./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/nla-digbench-scaling/egcd2-ll_valuebound20.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 551b0097 Calling Ultimate with: /root/.sdkman/candidates/java/21.0.5-tem/bin/java -Dosgi.configuration.area=/storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.6.800.v20240513-1750.jar -data @noDefault -ultimatedata /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/nla-digbench-scaling/egcd2-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 e587d407128aaafd417211e5ccf66790913a0bc1afeba03ae0cdb578f5831614 --- Real Ultimate output --- This is Ultimate 0.3.0-?-551b009-m [2025-01-09 03:18:10,280 INFO L188 SettingsManager]: Resetting all preferences to default values... [2025-01-09 03:18:10,332 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2025-01-09 03:18:10,336 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2025-01-09 03:18:10,336 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2025-01-09 03:18:10,353 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2025-01-09 03:18:10,354 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2025-01-09 03:18:10,354 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2025-01-09 03:18:10,354 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2025-01-09 03:18:10,354 INFO L153 SettingsManager]: * Use memory slicer=true [2025-01-09 03:18:10,355 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2025-01-09 03:18:10,355 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2025-01-09 03:18:10,355 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2025-01-09 03:18:10,355 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2025-01-09 03:18:10,355 INFO L153 SettingsManager]: * Use SBE=true [2025-01-09 03:18:10,356 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2025-01-09 03:18:10,356 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2025-01-09 03:18:10,356 INFO L153 SettingsManager]: * sizeof long=4 [2025-01-09 03:18:10,356 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2025-01-09 03:18:10,356 INFO L153 SettingsManager]: * sizeof POINTER=4 [2025-01-09 03:18:10,356 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2025-01-09 03:18:10,356 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2025-01-09 03:18:10,356 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2025-01-09 03:18:10,356 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2025-01-09 03:18:10,356 INFO L153 SettingsManager]: * sizeof long double=12 [2025-01-09 03:18:10,356 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2025-01-09 03:18:10,356 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2025-01-09 03:18:10,357 INFO L153 SettingsManager]: * Use constant arrays=true [2025-01-09 03:18:10,357 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2025-01-09 03:18:10,357 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2025-01-09 03:18:10,357 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2025-01-09 03:18:10,357 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2025-01-09 03:18:10,357 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-01-09 03:18:10,357 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2025-01-09 03:18:10,357 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2025-01-09 03:18:10,357 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2025-01-09 03:18:10,357 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2025-01-09 03:18:10,357 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-01-09 03:18:10,357 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2025-01-09 03:18:10,357 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2025-01-09 03:18:10,357 INFO L153 SettingsManager]: * Compute procedure contracts=false [2025-01-09 03:18:10,357 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2025-01-09 03:18:10,357 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2025-01-09 03:18:10,357 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2025-01-09 03:18:10,357 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2025-01-09 03:18:10,357 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2025-01-09 03:18:10,357 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2025-01-09 03:18:10,357 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2025-01-09 03:18:10,357 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 -> e587d407128aaafd417211e5ccf66790913a0bc1afeba03ae0cdb578f5831614 [2025-01-09 03:18:10,581 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2025-01-09 03:18:10,589 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2025-01-09 03:18:10,592 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2025-01-09 03:18:10,593 INFO L270 PluginConnector]: Initializing CDTParser... [2025-01-09 03:18:10,594 INFO L274 PluginConnector]: CDTParser initialized [2025-01-09 03:18:10,595 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/nla-digbench-scaling/egcd2-ll_valuebound20.c [2025-01-09 03:18:11,724 INFO L533 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/a48cb12f1/5b756da20ad74aadb8f45ffcba090146/FLAGd3f190aa2 [2025-01-09 03:18:11,947 INFO L384 CDTParser]: Found 1 translation units. [2025-01-09 03:18:11,952 INFO L180 CDTParser]: Scanning /storage/repos/ultimate-jdk21/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/egcd2-ll_valuebound20.c [2025-01-09 03:18:11,958 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/a48cb12f1/5b756da20ad74aadb8f45ffcba090146/FLAGd3f190aa2 [2025-01-09 03:18:12,294 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/a48cb12f1/5b756da20ad74aadb8f45ffcba090146 [2025-01-09 03:18:12,295 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2025-01-09 03:18:12,296 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2025-01-09 03:18:12,297 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2025-01-09 03:18:12,297 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2025-01-09 03:18:12,300 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2025-01-09 03:18:12,301 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.01 03:18:12" (1/1) ... [2025-01-09 03:18:12,302 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1c186f21 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 03:18:12, skipping insertion in model container [2025-01-09 03:18:12,302 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.01 03:18:12" (1/1) ... [2025-01-09 03:18:12,313 INFO L175 MainTranslator]: Built tables and reachable declarations [2025-01-09 03:18:12,407 WARN L250 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate-jdk21/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/egcd2-ll_valuebound20.c[490,503] [2025-01-09 03:18:12,421 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-01-09 03:18:12,428 INFO L200 MainTranslator]: Completed pre-run [2025-01-09 03:18:12,434 WARN L250 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate-jdk21/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/egcd2-ll_valuebound20.c[490,503] [2025-01-09 03:18:12,439 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-01-09 03:18:12,450 INFO L204 MainTranslator]: Completed translation [2025-01-09 03:18:12,452 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 03:18:12 WrapperNode [2025-01-09 03:18:12,452 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2025-01-09 03:18:12,453 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2025-01-09 03:18:12,453 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2025-01-09 03:18:12,453 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2025-01-09 03:18:12,457 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 03:18:12" (1/1) ... [2025-01-09 03:18:12,461 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 03:18:12" (1/1) ... [2025-01-09 03:18:12,471 INFO L138 Inliner]: procedures = 14, calls = 19, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 73 [2025-01-09 03:18:12,472 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2025-01-09 03:18:12,472 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2025-01-09 03:18:12,472 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2025-01-09 03:18:12,472 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2025-01-09 03:18:12,478 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 03:18:12" (1/1) ... [2025-01-09 03:18:12,478 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 03:18:12" (1/1) ... [2025-01-09 03:18:12,478 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 03:18:12" (1/1) ... [2025-01-09 03:18:12,485 INFO L175 MemorySlicer]: Split 2 memory accesses to 1 slices as follows [2]. 100 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2]. The 0 writes are split as follows [0]. [2025-01-09 03:18:12,485 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 03:18:12" (1/1) ... [2025-01-09 03:18:12,485 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 03:18:12" (1/1) ... [2025-01-09 03:18:12,487 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 03:18:12" (1/1) ... [2025-01-09 03:18:12,488 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 03:18:12" (1/1) ... [2025-01-09 03:18:12,490 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 03:18:12" (1/1) ... [2025-01-09 03:18:12,491 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 03:18:12" (1/1) ... [2025-01-09 03:18:12,492 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 03:18:12" (1/1) ... [2025-01-09 03:18:12,492 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2025-01-09 03:18:12,493 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2025-01-09 03:18:12,493 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2025-01-09 03:18:12,493 INFO L274 PluginConnector]: RCFGBuilder initialized [2025-01-09 03:18:12,494 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 03:18:12" (1/1) ... [2025-01-09 03:18:12,498 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-01-09 03:18:12,506 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-09 03:18:12,518 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2025-01-09 03:18:12,522 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2025-01-09 03:18:12,540 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2025-01-09 03:18:12,540 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2025-01-09 03:18:12,540 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2025-01-09 03:18:12,540 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2025-01-09 03:18:12,540 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2025-01-09 03:18:12,540 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2025-01-09 03:18:12,540 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2025-01-09 03:18:12,540 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2025-01-09 03:18:12,578 INFO L234 CfgBuilder]: Building ICFG [2025-01-09 03:18:12,580 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2025-01-09 03:18:12,693 INFO L? ?]: Removed 11 outVars from TransFormulas that were not future-live. [2025-01-09 03:18:12,694 INFO L283 CfgBuilder]: Performing block encoding [2025-01-09 03:18:12,700 INFO L307 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2025-01-09 03:18:12,700 INFO L312 CfgBuilder]: Removed 2 assume(true) statements. [2025-01-09 03:18:12,700 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.01 03:18:12 BoogieIcfgContainer [2025-01-09 03:18:12,700 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2025-01-09 03:18:12,702 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2025-01-09 03:18:12,702 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2025-01-09 03:18:12,705 INFO L274 PluginConnector]: TraceAbstraction initialized [2025-01-09 03:18:12,705 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.01 03:18:12" (1/3) ... [2025-01-09 03:18:12,705 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1e539f67 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.01 03:18:12, skipping insertion in model container [2025-01-09 03:18:12,705 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 03:18:12" (2/3) ... [2025-01-09 03:18:12,706 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1e539f67 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.01 03:18:12, skipping insertion in model container [2025-01-09 03:18:12,706 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.01 03:18:12" (3/3) ... [2025-01-09 03:18:12,707 INFO L128 eAbstractionObserver]: Analyzing ICFG egcd2-ll_valuebound20.c [2025-01-09 03:18:12,716 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2025-01-09 03:18:12,717 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG egcd2-ll_valuebound20.c that has 3 procedures, 33 locations, 1 initial locations, 2 loop locations, and 1 error locations. [2025-01-09 03:18:12,760 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2025-01-09 03:18:12,770 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;@5a8b74e7, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2025-01-09 03:18:12,770 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2025-01-09 03:18:12,774 INFO L276 IsEmpty]: Start isEmpty. Operand has 33 states, 18 states have (on average 1.3333333333333333) internal successors, (24), 19 states have internal predecessors, (24), 12 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2025-01-09 03:18:12,779 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2025-01-09 03:18:12,779 INFO L210 NwaCegarLoop]: Found error trace [2025-01-09 03:18:12,780 INFO L218 NwaCegarLoop]: trace histogram [6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-01-09 03:18:12,780 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-01-09 03:18:12,783 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-09 03:18:12,784 INFO L85 PathProgramCache]: Analyzing trace with hash 476401834, now seen corresponding path program 1 times [2025-01-09 03:18:12,790 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-09 03:18:12,790 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1542218623] [2025-01-09 03:18:12,791 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-09 03:18:12,791 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-09 03:18:12,838 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 39 statements into 1 equivalence classes. [2025-01-09 03:18:12,863 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 39 of 39 statements. [2025-01-09 03:18:12,865 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-09 03:18:12,865 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 03:18:13,112 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2025-01-09 03:18:13,112 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-09 03:18:13,112 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1542218623] [2025-01-09 03:18:13,113 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1542218623] provided 0 perfect and 1 imperfect interpolant sequences [2025-01-09 03:18:13,113 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [17764210] [2025-01-09 03:18:13,113 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-09 03:18:13,113 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-09 03:18:13,113 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-09 03:18:13,115 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-01-09 03:18:13,117 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2025-01-09 03:18:13,154 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 39 statements into 1 equivalence classes. [2025-01-09 03:18:13,171 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 39 of 39 statements. [2025-01-09 03:18:13,171 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-09 03:18:13,171 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 03:18:13,173 INFO L256 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 19 conjuncts are in the unsatisfiable core [2025-01-09 03:18:13,179 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-09 03:18:13,362 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 3 proven. 12 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2025-01-09 03:18:13,362 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-01-09 03:18:13,472 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [17764210] provided 0 perfect and 1 imperfect interpolant sequences [2025-01-09 03:18:13,472 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2025-01-09 03:18:13,472 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 9] total 11 [2025-01-09 03:18:13,473 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1135866364] [2025-01-09 03:18:13,474 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2025-01-09 03:18:13,477 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2025-01-09 03:18:13,477 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-09 03:18:13,488 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2025-01-09 03:18:13,488 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2025-01-09 03:18:13,490 INFO L87 Difference]: Start difference. First operand has 33 states, 18 states have (on average 1.3333333333333333) internal successors, (24), 19 states have internal predecessors, (24), 12 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) Second operand has 11 states, 10 states have (on average 1.8) internal successors, (18), 8 states have internal predecessors, (18), 6 states have call successors, (12), 3 states have call predecessors, (12), 2 states have return successors, (11), 5 states have call predecessors, (11), 4 states have call successors, (11) [2025-01-09 03:18:13,688 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-01-09 03:18:13,688 INFO L93 Difference]: Finished difference Result 74 states and 127 transitions. [2025-01-09 03:18:13,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2025-01-09 03:18:13,691 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 1.8) internal successors, (18), 8 states have internal predecessors, (18), 6 states have call successors, (12), 3 states have call predecessors, (12), 2 states have return successors, (11), 5 states have call predecessors, (11), 4 states have call successors, (11) Word has length 39 [2025-01-09 03:18:13,691 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-01-09 03:18:13,695 INFO L225 Difference]: With dead ends: 74 [2025-01-09 03:18:13,696 INFO L226 Difference]: Without dead ends: 40 [2025-01-09 03:18:13,699 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=55, Invalid=251, Unknown=0, NotChecked=0, Total=306 [2025-01-09 03:18:13,701 INFO L435 NwaCegarLoop]: 32 mSDtfsCounter, 29 mSDsluCounter, 150 mSDsCounter, 0 mSdLazyCounter, 152 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 182 SdHoareTripleChecker+Invalid, 181 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 152 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-01-09 03:18:13,701 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [29 Valid, 182 Invalid, 181 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 152 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-01-09 03:18:13,710 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2025-01-09 03:18:13,722 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 39. [2025-01-09 03:18:13,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 19 states have (on average 1.2105263157894737) internal successors, (23), 20 states have internal predecessors, (23), 16 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2025-01-09 03:18:13,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 54 transitions. [2025-01-09 03:18:13,726 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 54 transitions. Word has length 39 [2025-01-09 03:18:13,726 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-01-09 03:18:13,726 INFO L471 AbstractCegarLoop]: Abstraction has 39 states and 54 transitions. [2025-01-09 03:18:13,726 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 1.8) internal successors, (18), 8 states have internal predecessors, (18), 6 states have call successors, (12), 3 states have call predecessors, (12), 2 states have return successors, (11), 5 states have call predecessors, (11), 4 states have call successors, (11) [2025-01-09 03:18:13,727 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 54 transitions. [2025-01-09 03:18:13,727 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2025-01-09 03:18:13,727 INFO L210 NwaCegarLoop]: Found error trace [2025-01-09 03:18:13,727 INFO L218 NwaCegarLoop]: trace histogram [6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-01-09 03:18:13,733 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2025-01-09 03:18:13,928 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2025-01-09 03:18:13,928 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-01-09 03:18:13,929 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-09 03:18:13,929 INFO L85 PathProgramCache]: Analyzing trace with hash 478010548, now seen corresponding path program 1 times [2025-01-09 03:18:13,929 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-09 03:18:13,929 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1903250831] [2025-01-09 03:18:13,929 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-09 03:18:13,929 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-09 03:18:13,934 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 39 statements into 1 equivalence classes. [2025-01-09 03:18:13,946 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 39 of 39 statements. [2025-01-09 03:18:13,946 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-09 03:18:13,946 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unknown [2025-01-09 03:18:13,950 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [589675211] [2025-01-09 03:18:13,952 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-09 03:18:13,952 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-09 03:18:13,952 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-09 03:18:13,954 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-01-09 03:18:13,956 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2025-01-09 03:18:13,979 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 39 statements into 1 equivalence classes. [2025-01-09 03:18:13,991 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 39 of 39 statements. [2025-01-09 03:18:13,991 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-09 03:18:13,991 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 03:18:13,993 INFO L256 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 7 conjuncts are in the unsatisfiable core [2025-01-09 03:18:13,994 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-09 03:18:14,024 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2025-01-09 03:18:14,024 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-01-09 03:18:14,025 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-09 03:18:14,025 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1903250831] [2025-01-09 03:18:14,026 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2025-01-09 03:18:14,026 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [589675211] [2025-01-09 03:18:14,026 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [589675211] provided 1 perfect and 0 imperfect interpolant sequences [2025-01-09 03:18:14,026 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-01-09 03:18:14,026 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2025-01-09 03:18:14,026 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1088394102] [2025-01-09 03:18:14,026 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-01-09 03:18:14,027 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-01-09 03:18:14,027 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-09 03:18:14,028 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-01-09 03:18:14,028 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2025-01-09 03:18:14,028 INFO L87 Difference]: Start difference. First operand 39 states and 54 transitions. Second operand has 5 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2025-01-09 03:18:14,065 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-01-09 03:18:14,065 INFO L93 Difference]: Finished difference Result 56 states and 80 transitions. [2025-01-09 03:18:14,065 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-01-09 03:18:14,066 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) Word has length 39 [2025-01-09 03:18:14,066 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-01-09 03:18:14,067 INFO L225 Difference]: With dead ends: 56 [2025-01-09 03:18:14,068 INFO L226 Difference]: Without dead ends: 54 [2025-01-09 03:18:14,068 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2025-01-09 03:18:14,069 INFO L435 NwaCegarLoop]: 34 mSDtfsCounter, 4 mSDsluCounter, 94 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 128 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-01-09 03:18:14,069 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 128 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-01-09 03:18:14,070 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2025-01-09 03:18:14,075 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 45. [2025-01-09 03:18:14,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 22 states have (on average 1.1818181818181819) internal successors, (26), 25 states have internal predecessors, (26), 18 states have call successors, (18), 4 states have call predecessors, (18), 4 states have return successors, (17), 15 states have call predecessors, (17), 17 states have call successors, (17) [2025-01-09 03:18:14,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 61 transitions. [2025-01-09 03:18:14,077 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 61 transitions. Word has length 39 [2025-01-09 03:18:14,077 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-01-09 03:18:14,077 INFO L471 AbstractCegarLoop]: Abstraction has 45 states and 61 transitions. [2025-01-09 03:18:14,077 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2025-01-09 03:18:14,077 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 61 transitions. [2025-01-09 03:18:14,078 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2025-01-09 03:18:14,078 INFO L210 NwaCegarLoop]: Found error trace [2025-01-09 03:18:14,078 INFO L218 NwaCegarLoop]: trace histogram [6, 6, 6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-01-09 03:18:14,084 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2025-01-09 03:18:14,282 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-09 03:18:14,282 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-01-09 03:18:14,282 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-09 03:18:14,282 INFO L85 PathProgramCache]: Analyzing trace with hash -598860767, now seen corresponding path program 1 times [2025-01-09 03:18:14,282 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-09 03:18:14,283 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [875052822] [2025-01-09 03:18:14,283 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-09 03:18:14,283 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-09 03:18:14,287 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 44 statements into 1 equivalence classes. [2025-01-09 03:18:14,294 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 44 of 44 statements. [2025-01-09 03:18:14,294 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-09 03:18:14,294 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unknown [2025-01-09 03:18:14,295 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [738343649] [2025-01-09 03:18:14,295 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-09 03:18:14,295 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-09 03:18:14,295 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-09 03:18:14,297 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-01-09 03:18:14,298 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2025-01-09 03:18:14,322 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 44 statements into 1 equivalence classes. [2025-01-09 03:18:14,334 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 44 of 44 statements. [2025-01-09 03:18:14,334 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-09 03:18:14,334 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 03:18:14,335 INFO L256 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 9 conjuncts are in the unsatisfiable core [2025-01-09 03:18:14,336 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-09 03:18:14,377 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2025-01-09 03:18:14,377 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-01-09 03:18:14,377 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-09 03:18:14,377 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [875052822] [2025-01-09 03:18:14,377 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2025-01-09 03:18:14,377 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [738343649] [2025-01-09 03:18:14,378 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [738343649] provided 1 perfect and 0 imperfect interpolant sequences [2025-01-09 03:18:14,378 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-01-09 03:18:14,378 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2025-01-09 03:18:14,378 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [755411527] [2025-01-09 03:18:14,378 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-01-09 03:18:14,378 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-01-09 03:18:14,378 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-09 03:18:14,378 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-01-09 03:18:14,378 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2025-01-09 03:18:14,378 INFO L87 Difference]: Start difference. First operand 45 states and 61 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (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) [2025-01-09 03:18:14,410 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-01-09 03:18:14,411 INFO L93 Difference]: Finished difference Result 52 states and 67 transitions. [2025-01-09 03:18:14,411 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-01-09 03:18:14,411 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (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 44 [2025-01-09 03:18:14,412 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-01-09 03:18:14,413 INFO L225 Difference]: With dead ends: 52 [2025-01-09 03:18:14,414 INFO L226 Difference]: Without dead ends: 50 [2025-01-09 03:18:14,415 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2025-01-09 03:18:14,415 INFO L435 NwaCegarLoop]: 38 mSDtfsCounter, 5 mSDsluCounter, 100 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 138 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-01-09 03:18:14,415 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 138 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-01-09 03:18:14,416 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2025-01-09 03:18:14,432 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 49. [2025-01-09 03:18:14,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 25 states have (on average 1.16) internal successors, (29), 28 states have internal predecessors, (29), 18 states have call successors, (18), 5 states have call predecessors, (18), 5 states have return successors, (17), 15 states have call predecessors, (17), 17 states have call successors, (17) [2025-01-09 03:18:14,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 64 transitions. [2025-01-09 03:18:14,433 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 64 transitions. Word has length 44 [2025-01-09 03:18:14,433 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-01-09 03:18:14,433 INFO L471 AbstractCegarLoop]: Abstraction has 49 states and 64 transitions. [2025-01-09 03:18:14,433 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (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) [2025-01-09 03:18:14,433 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 64 transitions. [2025-01-09 03:18:14,434 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2025-01-09 03:18:14,434 INFO L210 NwaCegarLoop]: Found error trace [2025-01-09 03:18:14,434 INFO L218 NwaCegarLoop]: trace histogram [6, 6, 6, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-01-09 03:18:14,441 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2025-01-09 03:18:14,634 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 [2025-01-09 03:18:14,635 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-01-09 03:18:14,635 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-09 03:18:14,635 INFO L85 PathProgramCache]: Analyzing trace with hash -1269759039, now seen corresponding path program 1 times [2025-01-09 03:18:14,636 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-09 03:18:14,636 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1945053388] [2025-01-09 03:18:14,636 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-09 03:18:14,636 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-09 03:18:14,644 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 54 statements into 1 equivalence classes. [2025-01-09 03:18:14,658 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 54 of 54 statements. [2025-01-09 03:18:14,658 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-09 03:18:14,658 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unknown [2025-01-09 03:18:14,663 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2049601045] [2025-01-09 03:18:14,663 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-09 03:18:14,663 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-09 03:18:14,663 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-09 03:18:14,665 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-01-09 03:18:14,666 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2025-01-09 03:18:14,693 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 54 statements into 1 equivalence classes. [2025-01-09 03:18:14,712 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 54 of 54 statements. [2025-01-09 03:18:14,712 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-09 03:18:14,712 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 03:18:14,715 INFO L256 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 11 conjuncts are in the unsatisfiable core [2025-01-09 03:18:14,716 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-09 03:18:14,812 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2025-01-09 03:18:14,812 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-01-09 03:18:14,812 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-09 03:18:14,812 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1945053388] [2025-01-09 03:18:14,812 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2025-01-09 03:18:14,812 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2049601045] [2025-01-09 03:18:14,812 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2049601045] provided 1 perfect and 0 imperfect interpolant sequences [2025-01-09 03:18:14,812 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-01-09 03:18:14,812 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2025-01-09 03:18:14,812 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [824268266] [2025-01-09 03:18:14,812 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-01-09 03:18:14,813 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-01-09 03:18:14,813 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-09 03:18:14,813 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-01-09 03:18:14,813 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2025-01-09 03:18:14,813 INFO L87 Difference]: Start difference. First operand 49 states and 64 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2025-01-09 03:18:14,864 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-01-09 03:18:14,864 INFO L93 Difference]: Finished difference Result 56 states and 70 transitions. [2025-01-09 03:18:14,865 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-01-09 03:18:14,865 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) Word has length 54 [2025-01-09 03:18:14,865 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-01-09 03:18:14,866 INFO L225 Difference]: With dead ends: 56 [2025-01-09 03:18:14,866 INFO L226 Difference]: Without dead ends: 54 [2025-01-09 03:18:14,866 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2025-01-09 03:18:14,867 INFO L435 NwaCegarLoop]: 35 mSDtfsCounter, 5 mSDsluCounter, 90 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 125 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-01-09 03:18:14,867 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 125 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-01-09 03:18:14,867 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2025-01-09 03:18:14,878 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 53. [2025-01-09 03:18:14,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 28 states have (on average 1.1428571428571428) internal successors, (32), 31 states have internal predecessors, (32), 18 states have call successors, (18), 6 states have call predecessors, (18), 6 states have return successors, (17), 15 states have call predecessors, (17), 17 states have call successors, (17) [2025-01-09 03:18:14,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 67 transitions. [2025-01-09 03:18:14,880 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 67 transitions. Word has length 54 [2025-01-09 03:18:14,880 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-01-09 03:18:14,880 INFO L471 AbstractCegarLoop]: Abstraction has 53 states and 67 transitions. [2025-01-09 03:18:14,880 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2025-01-09 03:18:14,880 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 67 transitions. [2025-01-09 03:18:14,881 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2025-01-09 03:18:14,881 INFO L210 NwaCegarLoop]: Found error trace [2025-01-09 03:18:14,881 INFO L218 NwaCegarLoop]: trace histogram [6, 6, 6, 5, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-01-09 03:18:14,888 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2025-01-09 03:18:15,082 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 [2025-01-09 03:18:15,082 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-01-09 03:18:15,083 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-09 03:18:15,083 INFO L85 PathProgramCache]: Analyzing trace with hash -1519288936, now seen corresponding path program 1 times [2025-01-09 03:18:15,083 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-09 03:18:15,083 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [342064456] [2025-01-09 03:18:15,083 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-09 03:18:15,083 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-09 03:18:15,089 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 60 statements into 1 equivalence classes. [2025-01-09 03:18:15,101 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 60 of 60 statements. [2025-01-09 03:18:15,104 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-09 03:18:15,105 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unknown [2025-01-09 03:18:15,106 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1205737618] [2025-01-09 03:18:15,106 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-09 03:18:15,106 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-09 03:18:15,106 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-09 03:18:15,108 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-01-09 03:18:15,108 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2025-01-09 03:18:15,135 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 60 statements into 1 equivalence classes. [2025-01-09 03:18:15,151 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 60 of 60 statements. [2025-01-09 03:18:15,152 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-09 03:18:15,152 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 03:18:15,153 INFO L256 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 11 conjuncts are in the unsatisfiable core [2025-01-09 03:18:15,154 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-09 03:18:15,197 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 8 proven. 1 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2025-01-09 03:18:15,197 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-01-09 03:18:15,282 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 8 proven. 1 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2025-01-09 03:18:15,283 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-09 03:18:15,283 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [342064456] [2025-01-09 03:18:15,283 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2025-01-09 03:18:15,283 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1205737618] [2025-01-09 03:18:15,283 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1205737618] provided 0 perfect and 2 imperfect interpolant sequences [2025-01-09 03:18:15,283 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2025-01-09 03:18:15,283 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2025-01-09 03:18:15,283 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [513330053] [2025-01-09 03:18:15,283 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2025-01-09 03:18:15,284 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2025-01-09 03:18:15,284 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-09 03:18:15,284 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2025-01-09 03:18:15,284 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2025-01-09 03:18:15,284 INFO L87 Difference]: Start difference. First operand 53 states and 67 transitions. Second operand has 7 states, 5 states have (on average 3.2) internal successors, (16), 6 states have internal predecessors, (16), 4 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2025-01-09 03:18:15,371 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-01-09 03:18:15,372 INFO L93 Difference]: Finished difference Result 79 states and 110 transitions. [2025-01-09 03:18:15,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2025-01-09 03:18:15,372 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 5 states have (on average 3.2) internal successors, (16), 6 states have internal predecessors, (16), 4 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) Word has length 60 [2025-01-09 03:18:15,373 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-01-09 03:18:15,373 INFO L225 Difference]: With dead ends: 79 [2025-01-09 03:18:15,373 INFO L226 Difference]: Without dead ends: 77 [2025-01-09 03:18:15,374 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 110 SyntacticMatches, 3 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2025-01-09 03:18:15,374 INFO L435 NwaCegarLoop]: 41 mSDtfsCounter, 8 mSDsluCounter, 103 mSDsCounter, 0 mSdLazyCounter, 59 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 144 SdHoareTripleChecker+Invalid, 65 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 59 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-01-09 03:18:15,374 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 144 Invalid, 65 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 59 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-01-09 03:18:15,376 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2025-01-09 03:18:15,393 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 51. [2025-01-09 03:18:15,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 28 states have (on average 1.1428571428571428) internal successors, (32), 29 states have internal predecessors, (32), 16 states have call successors, (16), 6 states have call predecessors, (16), 6 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2025-01-09 03:18:15,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 63 transitions. [2025-01-09 03:18:15,394 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 63 transitions. Word has length 60 [2025-01-09 03:18:15,395 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-01-09 03:18:15,395 INFO L471 AbstractCegarLoop]: Abstraction has 51 states and 63 transitions. [2025-01-09 03:18:15,395 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 5 states have (on average 3.2) internal successors, (16), 6 states have internal predecessors, (16), 4 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2025-01-09 03:18:15,395 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 63 transitions. [2025-01-09 03:18:15,395 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2025-01-09 03:18:15,395 INFO L210 NwaCegarLoop]: Found error trace [2025-01-09 03:18:15,395 INFO L218 NwaCegarLoop]: trace histogram [6, 6, 6, 5, 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, 1, 1, 1, 1, 1, 1, 1] [2025-01-09 03:18:15,402 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2025-01-09 03:18:15,596 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-09 03:18:15,596 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-01-09 03:18:15,596 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-09 03:18:15,596 INFO L85 PathProgramCache]: Analyzing trace with hash 1565962236, now seen corresponding path program 1 times [2025-01-09 03:18:15,597 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-09 03:18:15,597 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [970043999] [2025-01-09 03:18:15,597 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-09 03:18:15,597 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-09 03:18:15,601 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 62 statements into 1 equivalence classes. [2025-01-09 03:18:15,616 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 62 of 62 statements. [2025-01-09 03:18:15,616 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-09 03:18:15,616 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 03:18:15,777 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 14 proven. 10 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2025-01-09 03:18:15,777 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-09 03:18:15,777 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [970043999] [2025-01-09 03:18:15,777 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [970043999] provided 0 perfect and 1 imperfect interpolant sequences [2025-01-09 03:18:15,777 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1606407779] [2025-01-09 03:18:15,777 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-09 03:18:15,777 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-09 03:18:15,777 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-09 03:18:15,780 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-01-09 03:18:15,780 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2025-01-09 03:18:15,804 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 62 statements into 1 equivalence classes. [2025-01-09 03:18:15,820 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 62 of 62 statements. [2025-01-09 03:18:15,820 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-09 03:18:15,820 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 03:18:15,822 INFO L256 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 9 conjuncts are in the unsatisfiable core [2025-01-09 03:18:15,823 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-09 03:18:15,869 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 14 proven. 10 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2025-01-09 03:18:15,869 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-01-09 03:18:15,945 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 14 proven. 10 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2025-01-09 03:18:15,946 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1606407779] provided 0 perfect and 2 imperfect interpolant sequences [2025-01-09 03:18:15,946 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-01-09 03:18:15,946 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 12 [2025-01-09 03:18:15,946 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [15630507] [2025-01-09 03:18:15,946 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-01-09 03:18:15,946 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2025-01-09 03:18:15,947 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-09 03:18:15,947 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2025-01-09 03:18:15,947 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2025-01-09 03:18:15,947 INFO L87 Difference]: Start difference. First operand 51 states and 63 transitions. Second operand has 12 states, 12 states have (on average 2.25) internal successors, (27), 11 states have internal predecessors, (27), 7 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (16), 6 states have call predecessors, (16), 6 states have call successors, (16) [2025-01-09 03:18:16,077 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-01-09 03:18:16,077 INFO L93 Difference]: Finished difference Result 91 states and 131 transitions. [2025-01-09 03:18:16,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2025-01-09 03:18:16,078 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.25) internal successors, (27), 11 states have internal predecessors, (27), 7 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (16), 6 states have call predecessors, (16), 6 states have call successors, (16) Word has length 62 [2025-01-09 03:18:16,078 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-01-09 03:18:16,079 INFO L225 Difference]: With dead ends: 91 [2025-01-09 03:18:16,079 INFO L226 Difference]: Without dead ends: 83 [2025-01-09 03:18:16,080 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 116 SyntacticMatches, 4 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2025-01-09 03:18:16,080 INFO L435 NwaCegarLoop]: 40 mSDtfsCounter, 25 mSDsluCounter, 199 mSDsCounter, 0 mSdLazyCounter, 118 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 239 SdHoareTripleChecker+Invalid, 148 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 118 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-01-09 03:18:16,080 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [35 Valid, 239 Invalid, 148 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 118 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-01-09 03:18:16,080 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2025-01-09 03:18:16,106 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 75. [2025-01-09 03:18:16,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 36 states have (on average 1.25) internal successors, (45), 37 states have internal predecessors, (45), 32 states have call successors, (32), 6 states have call predecessors, (32), 6 states have return successors, (31), 31 states have call predecessors, (31), 31 states have call successors, (31) [2025-01-09 03:18:16,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 108 transitions. [2025-01-09 03:18:16,109 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 108 transitions. Word has length 62 [2025-01-09 03:18:16,109 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-01-09 03:18:16,109 INFO L471 AbstractCegarLoop]: Abstraction has 75 states and 108 transitions. [2025-01-09 03:18:16,109 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.25) internal successors, (27), 11 states have internal predecessors, (27), 7 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (16), 6 states have call predecessors, (16), 6 states have call successors, (16) [2025-01-09 03:18:16,111 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 108 transitions. [2025-01-09 03:18:16,111 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2025-01-09 03:18:16,111 INFO L210 NwaCegarLoop]: Found error trace [2025-01-09 03:18:16,112 INFO L218 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-01-09 03:18:16,122 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2025-01-09 03:18:16,312 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,SelfDestructingSolverStorable5 [2025-01-09 03:18:16,312 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-01-09 03:18:16,312 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-09 03:18:16,313 INFO L85 PathProgramCache]: Analyzing trace with hash 843939855, now seen corresponding path program 1 times [2025-01-09 03:18:16,313 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-09 03:18:16,313 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [71699842] [2025-01-09 03:18:16,313 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-09 03:18:16,313 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-09 03:18:16,317 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 67 statements into 1 equivalence classes. [2025-01-09 03:18:16,331 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 67 of 67 statements. [2025-01-09 03:18:16,332 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-09 03:18:16,332 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unknown [2025-01-09 03:18:16,332 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1564047605] [2025-01-09 03:18:16,332 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-09 03:18:16,332 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-09 03:18:16,332 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-09 03:18:16,336 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-01-09 03:18:16,338 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2025-01-09 03:18:16,360 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 67 statements into 1 equivalence classes. [2025-01-09 03:18:16,377 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 67 of 67 statements. [2025-01-09 03:18:16,377 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-09 03:18:16,377 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 03:18:16,380 INFO L256 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 17 conjuncts are in the unsatisfiable core [2025-01-09 03:18:16,382 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-09 03:18:16,451 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 10 proven. 3 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2025-01-09 03:18:16,451 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-01-09 03:18:16,477 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-09 03:18:16,478 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [71699842] [2025-01-09 03:18:16,478 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2025-01-09 03:18:16,478 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1564047605] [2025-01-09 03:18:16,478 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1564047605] provided 0 perfect and 1 imperfect interpolant sequences [2025-01-09 03:18:16,478 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2025-01-09 03:18:16,478 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2025-01-09 03:18:16,478 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [861019440] [2025-01-09 03:18:16,478 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2025-01-09 03:18:16,478 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2025-01-09 03:18:16,478 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-09 03:18:16,479 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2025-01-09 03:18:16,479 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2025-01-09 03:18:16,479 INFO L87 Difference]: Start difference. First operand 75 states and 108 transitions. Second operand has 6 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 5 states have internal predecessors, (17), 3 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2025-01-09 03:18:16,555 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-01-09 03:18:16,555 INFO L93 Difference]: Finished difference Result 105 states and 154 transitions. [2025-01-09 03:18:16,556 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2025-01-09 03:18:16,556 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 5 states have internal predecessors, (17), 3 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) Word has length 67 [2025-01-09 03:18:16,556 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-01-09 03:18:16,557 INFO L225 Difference]: With dead ends: 105 [2025-01-09 03:18:16,557 INFO L226 Difference]: Without dead ends: 102 [2025-01-09 03:18:16,558 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 64 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2025-01-09 03:18:16,558 INFO L435 NwaCegarLoop]: 45 mSDtfsCounter, 7 mSDsluCounter, 137 mSDsCounter, 0 mSdLazyCounter, 69 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 182 SdHoareTripleChecker+Invalid, 71 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 69 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-01-09 03:18:16,558 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 182 Invalid, 71 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 69 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-01-09 03:18:16,558 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2025-01-09 03:18:16,578 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 99. [2025-01-09 03:18:16,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 46 states have (on average 1.2826086956521738) internal successors, (59), 48 states have internal predecessors, (59), 45 states have call successors, (45), 7 states have call predecessors, (45), 7 states have return successors, (43), 43 states have call predecessors, (43), 43 states have call successors, (43) [2025-01-09 03:18:16,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 147 transitions. [2025-01-09 03:18:16,579 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 147 transitions. Word has length 67 [2025-01-09 03:18:16,579 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-01-09 03:18:16,580 INFO L471 AbstractCegarLoop]: Abstraction has 99 states and 147 transitions. [2025-01-09 03:18:16,580 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 5 states have internal predecessors, (17), 3 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2025-01-09 03:18:16,580 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 147 transitions. [2025-01-09 03:18:16,580 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2025-01-09 03:18:16,580 INFO L210 NwaCegarLoop]: Found error trace [2025-01-09 03:18:16,581 INFO L218 NwaCegarLoop]: trace histogram [7, 6, 6, 6, 6, 6, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-01-09 03:18:16,587 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2025-01-09 03:18:16,785 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,8 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-09 03:18:16,785 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-01-09 03:18:16,785 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-09 03:18:16,785 INFO L85 PathProgramCache]: Analyzing trace with hash -785223322, now seen corresponding path program 2 times [2025-01-09 03:18:16,785 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-09 03:18:16,785 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1842437097] [2025-01-09 03:18:16,786 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-01-09 03:18:16,786 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-09 03:18:16,790 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 72 statements into 2 equivalence classes. [2025-01-09 03:18:16,806 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 72 of 72 statements. [2025-01-09 03:18:16,807 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-01-09 03:18:16,807 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unknown [2025-01-09 03:18:16,807 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [771768323] [2025-01-09 03:18:16,808 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-01-09 03:18:16,809 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-09 03:18:16,809 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-09 03:18:16,810 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-01-09 03:18:16,812 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2025-01-09 03:18:16,837 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 72 statements into 2 equivalence classes. [2025-01-09 03:18:16,855 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 72 of 72 statements. [2025-01-09 03:18:16,855 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-01-09 03:18:16,855 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 03:18:16,856 INFO L256 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 21 conjuncts are in the unsatisfiable core [2025-01-09 03:18:16,858 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-09 03:18:16,993 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 12 proven. 4 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2025-01-09 03:18:16,993 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-01-09 03:18:17,029 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-09 03:18:17,029 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1842437097] [2025-01-09 03:18:17,029 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2025-01-09 03:18:17,029 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [771768323] [2025-01-09 03:18:17,029 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [771768323] provided 0 perfect and 1 imperfect interpolant sequences [2025-01-09 03:18:17,029 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2025-01-09 03:18:17,029 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2025-01-09 03:18:17,029 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2013184075] [2025-01-09 03:18:17,030 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2025-01-09 03:18:17,030 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2025-01-09 03:18:17,030 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-09 03:18:17,030 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2025-01-09 03:18:17,030 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2025-01-09 03:18:17,031 INFO L87 Difference]: Start difference. First operand 99 states and 147 transitions. Second operand has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 6 states have internal predecessors, (17), 4 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (12), 4 states have call predecessors, (12), 4 states have call successors, (12) [2025-01-09 03:18:17,153 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-01-09 03:18:17,153 INFO L93 Difference]: Finished difference Result 111 states and 157 transitions. [2025-01-09 03:18:17,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2025-01-09 03:18:17,155 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 6 states have internal predecessors, (17), 4 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (12), 4 states have call predecessors, (12), 4 states have call successors, (12) Word has length 72 [2025-01-09 03:18:17,155 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-01-09 03:18:17,156 INFO L225 Difference]: With dead ends: 111 [2025-01-09 03:18:17,157 INFO L226 Difference]: Without dead ends: 109 [2025-01-09 03:18:17,157 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 68 SyntacticMatches, 2 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2025-01-09 03:18:17,158 INFO L435 NwaCegarLoop]: 39 mSDtfsCounter, 10 mSDsluCounter, 157 mSDsCounter, 0 mSdLazyCounter, 96 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 196 SdHoareTripleChecker+Invalid, 103 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 96 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-01-09 03:18:17,158 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 196 Invalid, 103 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 96 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-01-09 03:18:17,161 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2025-01-09 03:18:17,179 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 107. [2025-01-09 03:18:17,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107 states, 52 states have (on average 1.25) internal successors, (65), 54 states have internal predecessors, (65), 45 states have call successors, (45), 9 states have call predecessors, (45), 9 states have return successors, (43), 43 states have call predecessors, (43), 43 states have call successors, (43) [2025-01-09 03:18:17,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 153 transitions. [2025-01-09 03:18:17,181 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 153 transitions. Word has length 72 [2025-01-09 03:18:17,181 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-01-09 03:18:17,181 INFO L471 AbstractCegarLoop]: Abstraction has 107 states and 153 transitions. [2025-01-09 03:18:17,182 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 6 states have internal predecessors, (17), 4 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (12), 4 states have call predecessors, (12), 4 states have call successors, (12) [2025-01-09 03:18:17,182 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 153 transitions. [2025-01-09 03:18:17,185 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2025-01-09 03:18:17,187 INFO L210 NwaCegarLoop]: Found error trace [2025-01-09 03:18:17,187 INFO L218 NwaCegarLoop]: trace histogram [8, 7, 7, 6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-01-09 03:18:17,196 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2025-01-09 03:18:17,388 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,9 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-09 03:18:17,388 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-01-09 03:18:17,389 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-09 03:18:17,389 INFO L85 PathProgramCache]: Analyzing trace with hash -1253124561, now seen corresponding path program 3 times [2025-01-09 03:18:17,389 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-09 03:18:17,389 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1470632278] [2025-01-09 03:18:17,389 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-01-09 03:18:17,389 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-09 03:18:17,393 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 77 statements into 6 equivalence classes. [2025-01-09 03:18:17,425 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) and asserted 77 of 77 statements. [2025-01-09 03:18:17,425 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2025-01-09 03:18:17,425 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unknown [2025-01-09 03:18:17,426 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1095057695] [2025-01-09 03:18:17,426 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-01-09 03:18:17,426 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-09 03:18:17,426 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-09 03:18:17,428 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-01-09 03:18:17,429 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2025-01-09 03:18:17,453 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 77 statements into 6 equivalence classes. [2025-01-09 03:18:17,472 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) and asserted 46 of 77 statements. [2025-01-09 03:18:17,473 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2025-01-09 03:18:17,473 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 03:18:17,474 INFO L256 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 48 conjuncts are in the unsatisfiable core [2025-01-09 03:18:17,476 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-09 03:18:17,929 INFO L134 CoverageAnalysis]: Checked inductivity of 163 backedges. 43 proven. 18 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2025-01-09 03:18:17,930 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-01-09 03:18:18,338 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-09 03:18:18,338 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1470632278] [2025-01-09 03:18:18,338 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2025-01-09 03:18:18,338 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1095057695] [2025-01-09 03:18:18,338 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1095057695] provided 0 perfect and 1 imperfect interpolant sequences [2025-01-09 03:18:18,338 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2025-01-09 03:18:18,339 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2025-01-09 03:18:18,339 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [489886415] [2025-01-09 03:18:18,339 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2025-01-09 03:18:18,339 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2025-01-09 03:18:18,339 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-09 03:18:18,339 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2025-01-09 03:18:18,340 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=394, Unknown=0, NotChecked=0, Total=462 [2025-01-09 03:18:18,340 INFO L87 Difference]: Start difference. First operand 107 states and 153 transitions. Second operand has 15 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 13 states have internal predecessors, (23), 5 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (13), 5 states have call predecessors, (13), 5 states have call successors, (13) [2025-01-09 03:18:18,651 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-01-09 03:18:18,651 INFO L93 Difference]: Finished difference Result 115 states and 160 transitions. [2025-01-09 03:18:18,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2025-01-09 03:18:18,652 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 13 states have internal predecessors, (23), 5 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (13), 5 states have call predecessors, (13), 5 states have call successors, (13) Word has length 77 [2025-01-09 03:18:18,652 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-01-09 03:18:18,654 INFO L225 Difference]: With dead ends: 115 [2025-01-09 03:18:18,654 INFO L226 Difference]: Without dead ends: 113 [2025-01-09 03:18:18,655 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 79 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 111 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=94, Invalid=506, Unknown=0, NotChecked=0, Total=600 [2025-01-09 03:18:18,655 INFO L435 NwaCegarLoop]: 24 mSDtfsCounter, 20 mSDsluCounter, 204 mSDsCounter, 0 mSdLazyCounter, 377 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 228 SdHoareTripleChecker+Invalid, 386 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 377 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2025-01-09 03:18:18,655 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [30 Valid, 228 Invalid, 386 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 377 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2025-01-09 03:18:18,655 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2025-01-09 03:18:18,675 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 111. [2025-01-09 03:18:18,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 55 states have (on average 1.2363636363636363) internal successors, (68), 57 states have internal predecessors, (68), 45 states have call successors, (45), 10 states have call predecessors, (45), 10 states have return successors, (43), 43 states have call predecessors, (43), 43 states have call successors, (43) [2025-01-09 03:18:18,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 156 transitions. [2025-01-09 03:18:18,677 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 156 transitions. Word has length 77 [2025-01-09 03:18:18,678 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-01-09 03:18:18,678 INFO L471 AbstractCegarLoop]: Abstraction has 111 states and 156 transitions. [2025-01-09 03:18:18,678 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 13 states have internal predecessors, (23), 5 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (13), 5 states have call predecessors, (13), 5 states have call successors, (13) [2025-01-09 03:18:18,678 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 156 transitions. [2025-01-09 03:18:18,679 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2025-01-09 03:18:18,679 INFO L210 NwaCegarLoop]: Found error trace [2025-01-09 03:18:18,679 INFO L218 NwaCegarLoop]: trace histogram [9, 8, 8, 6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-01-09 03:18:18,685 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2025-01-09 03:18:18,884 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,10 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-09 03:18:18,884 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-01-09 03:18:18,884 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-09 03:18:18,885 INFO L85 PathProgramCache]: Analyzing trace with hash -575517032, now seen corresponding path program 1 times [2025-01-09 03:18:18,885 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-09 03:18:18,885 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1534001376] [2025-01-09 03:18:18,885 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-09 03:18:18,885 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-09 03:18:18,889 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 83 statements into 1 equivalence classes. [2025-01-09 03:18:18,898 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 83 of 83 statements. [2025-01-09 03:18:18,898 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-09 03:18:18,898 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unknown [2025-01-09 03:18:18,899 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1268219832] [2025-01-09 03:18:18,899 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-09 03:18:18,899 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-09 03:18:18,899 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-09 03:18:18,901 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-01-09 03:18:18,903 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2025-01-09 03:18:18,926 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 83 statements into 1 equivalence classes. [2025-01-09 03:18:18,945 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 83 of 83 statements. [2025-01-09 03:18:18,945 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-09 03:18:18,945 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 03:18:18,946 INFO L256 TraceCheckSpWp]: Trace formula consists of 205 conjuncts, 41 conjuncts are in the unsatisfiable core [2025-01-09 03:18:18,948 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-09 03:18:19,335 INFO L134 CoverageAnalysis]: Checked inductivity of 194 backedges. 22 proven. 15 refuted. 0 times theorem prover too weak. 157 trivial. 0 not checked. [2025-01-09 03:18:19,336 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-01-09 03:18:19,623 INFO L134 CoverageAnalysis]: Checked inductivity of 194 backedges. 16 proven. 6 refuted. 0 times theorem prover too weak. 172 trivial. 0 not checked. [2025-01-09 03:18:19,623 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-09 03:18:19,623 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1534001376] [2025-01-09 03:18:19,623 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2025-01-09 03:18:19,623 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1268219832] [2025-01-09 03:18:19,624 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1268219832] provided 0 perfect and 2 imperfect interpolant sequences [2025-01-09 03:18:19,624 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2025-01-09 03:18:19,624 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10] total 21 [2025-01-09 03:18:19,624 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1509298959] [2025-01-09 03:18:19,624 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2025-01-09 03:18:19,624 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2025-01-09 03:18:19,624 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-09 03:18:19,625 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2025-01-09 03:18:19,625 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=356, Unknown=0, NotChecked=0, Total=420 [2025-01-09 03:18:19,625 INFO L87 Difference]: Start difference. First operand 111 states and 156 transitions. Second operand has 21 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 18 states have internal predecessors, (29), 10 states have call successors, (27), 3 states have call predecessors, (27), 2 states have return successors, (26), 8 states have call predecessors, (26), 8 states have call successors, (26) [2025-01-09 03:18:21,479 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-01-09 03:18:21,479 INFO L93 Difference]: Finished difference Result 195 states and 303 transitions. [2025-01-09 03:18:21,480 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2025-01-09 03:18:21,480 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 18 states have internal predecessors, (29), 10 states have call successors, (27), 3 states have call predecessors, (27), 2 states have return successors, (26), 8 states have call predecessors, (26), 8 states have call successors, (26) Word has length 83 [2025-01-09 03:18:21,480 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-01-09 03:18:21,482 INFO L225 Difference]: With dead ends: 195 [2025-01-09 03:18:21,483 INFO L226 Difference]: Without dead ends: 191 [2025-01-09 03:18:21,484 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 181 GetRequests, 145 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 206 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=255, Invalid=1151, Unknown=0, NotChecked=0, Total=1406 [2025-01-09 03:18:21,485 INFO L435 NwaCegarLoop]: 40 mSDtfsCounter, 59 mSDsluCounter, 347 mSDsCounter, 0 mSdLazyCounter, 530 mSolverCounterSat, 114 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 387 SdHoareTripleChecker+Invalid, 644 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 114 IncrementalHoareTripleChecker+Valid, 530 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2025-01-09 03:18:21,485 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [64 Valid, 387 Invalid, 644 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [114 Valid, 530 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2025-01-09 03:18:21,485 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191 states. [2025-01-09 03:18:21,525 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191 to 188. [2025-01-09 03:18:21,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 188 states, 81 states have (on average 1.3333333333333333) internal successors, (108), 84 states have internal predecessors, (108), 94 states have call successors, (94), 12 states have call predecessors, (94), 12 states have return successors, (92), 91 states have call predecessors, (92), 92 states have call successors, (92) [2025-01-09 03:18:21,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 188 states to 188 states and 294 transitions. [2025-01-09 03:18:21,527 INFO L78 Accepts]: Start accepts. Automaton has 188 states and 294 transitions. Word has length 83 [2025-01-09 03:18:21,527 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-01-09 03:18:21,527 INFO L471 AbstractCegarLoop]: Abstraction has 188 states and 294 transitions. [2025-01-09 03:18:21,527 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 18 states have internal predecessors, (29), 10 states have call successors, (27), 3 states have call predecessors, (27), 2 states have return successors, (26), 8 states have call predecessors, (26), 8 states have call successors, (26) [2025-01-09 03:18:21,528 INFO L276 IsEmpty]: Start isEmpty. Operand 188 states and 294 transitions. [2025-01-09 03:18:21,529 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2025-01-09 03:18:21,529 INFO L210 NwaCegarLoop]: Found error trace [2025-01-09 03:18:21,529 INFO L218 NwaCegarLoop]: trace histogram [10, 9, 9, 6, 6, 6, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-01-09 03:18:21,535 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2025-01-09 03:18:21,730 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2025-01-09 03:18:21,730 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-01-09 03:18:21,730 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-09 03:18:21,731 INFO L85 PathProgramCache]: Analyzing trace with hash 1898025057, now seen corresponding path program 4 times [2025-01-09 03:18:21,731 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-09 03:18:21,731 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2008589895] [2025-01-09 03:18:21,731 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-01-09 03:18:21,731 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-09 03:18:21,735 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 90 statements into 2 equivalence classes. [2025-01-09 03:18:21,739 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) and asserted 83 of 90 statements. [2025-01-09 03:18:21,739 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) [2025-01-09 03:18:21,739 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 03:18:21,811 INFO L134 CoverageAnalysis]: Checked inductivity of 235 backedges. 31 proven. 0 refuted. 0 times theorem prover too weak. 204 trivial. 0 not checked. [2025-01-09 03:18:21,811 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-09 03:18:21,812 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2008589895] [2025-01-09 03:18:21,812 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2008589895] provided 1 perfect and 0 imperfect interpolant sequences [2025-01-09 03:18:21,812 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-01-09 03:18:21,812 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2025-01-09 03:18:21,812 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2019311148] [2025-01-09 03:18:21,812 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-01-09 03:18:21,812 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-01-09 03:18:21,812 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-09 03:18:21,813 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-01-09 03:18:21,813 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2025-01-09 03:18:21,813 INFO L87 Difference]: Start difference. First operand 188 states and 294 transitions. Second operand has 5 states, 5 states have (on average 4.0) internal successors, (20), 5 states have internal predecessors, (20), 3 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (15), 3 states have call predecessors, (15), 3 states have call successors, (15) [2025-01-09 03:18:21,884 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-01-09 03:18:21,884 INFO L93 Difference]: Finished difference Result 233 states and 362 transitions. [2025-01-09 03:18:21,884 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2025-01-09 03:18:21,884 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.0) internal successors, (20), 5 states have internal predecessors, (20), 3 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (15), 3 states have call predecessors, (15), 3 states have call successors, (15) Word has length 90 [2025-01-09 03:18:21,885 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-01-09 03:18:21,886 INFO L225 Difference]: With dead ends: 233 [2025-01-09 03:18:21,886 INFO L226 Difference]: Without dead ends: 171 [2025-01-09 03:18:21,888 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2025-01-09 03:18:21,889 INFO L435 NwaCegarLoop]: 46 mSDtfsCounter, 4 mSDsluCounter, 111 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 157 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-01-09 03:18:21,889 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 157 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-01-09 03:18:21,890 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2025-01-09 03:18:21,934 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 162. [2025-01-09 03:18:21,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 162 states, 71 states have (on average 1.2394366197183098) internal successors, (88), 74 states have internal predecessors, (88), 78 states have call successors, (78), 12 states have call predecessors, (78), 12 states have return successors, (76), 75 states have call predecessors, (76), 76 states have call successors, (76) [2025-01-09 03:18:21,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 242 transitions. [2025-01-09 03:18:21,936 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 242 transitions. Word has length 90 [2025-01-09 03:18:21,936 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-01-09 03:18:21,936 INFO L471 AbstractCegarLoop]: Abstraction has 162 states and 242 transitions. [2025-01-09 03:18:21,937 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.0) internal successors, (20), 5 states have internal predecessors, (20), 3 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (15), 3 states have call predecessors, (15), 3 states have call successors, (15) [2025-01-09 03:18:21,937 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 242 transitions. [2025-01-09 03:18:21,937 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2025-01-09 03:18:21,937 INFO L210 NwaCegarLoop]: Found error trace [2025-01-09 03:18:21,937 INFO L218 NwaCegarLoop]: trace histogram [12, 11, 11, 6, 6, 6, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-01-09 03:18:21,937 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2025-01-09 03:18:21,937 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-01-09 03:18:21,938 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-09 03:18:21,938 INFO L85 PathProgramCache]: Analyzing trace with hash -1889096685, now seen corresponding path program 1 times [2025-01-09 03:18:21,938 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-09 03:18:21,938 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1984250644] [2025-01-09 03:18:21,938 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-09 03:18:21,938 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-09 03:18:21,942 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 98 statements into 1 equivalence classes. [2025-01-09 03:18:21,959 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 98 of 98 statements. [2025-01-09 03:18:21,959 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-09 03:18:21,959 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unknown [2025-01-09 03:18:21,960 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [824662777] [2025-01-09 03:18:21,960 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-09 03:18:21,960 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-09 03:18:21,960 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-09 03:18:21,962 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-01-09 03:18:21,963 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2025-01-09 03:18:21,987 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 98 statements into 1 equivalence classes. [2025-01-09 03:18:22,011 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 98 of 98 statements. [2025-01-09 03:18:22,011 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-09 03:18:22,011 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 03:18:22,012 INFO L256 TraceCheckSpWp]: Trace formula consists of 235 conjuncts, 54 conjuncts are in the unsatisfiable core [2025-01-09 03:18:22,014 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-09 03:18:22,602 INFO L134 CoverageAnalysis]: Checked inductivity of 316 backedges. 74 proven. 31 refuted. 0 times theorem prover too weak. 211 trivial. 0 not checked. [2025-01-09 03:18:22,602 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-01-09 03:18:43,722 INFO L134 CoverageAnalysis]: Checked inductivity of 316 backedges. 68 proven. 22 refuted. 0 times theorem prover too weak. 226 trivial. 0 not checked. [2025-01-09 03:18:43,722 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-09 03:18:43,722 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1984250644] [2025-01-09 03:18:43,722 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2025-01-09 03:18:43,723 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [824662777] [2025-01-09 03:18:43,723 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [824662777] provided 0 perfect and 2 imperfect interpolant sequences [2025-01-09 03:18:43,723 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2025-01-09 03:18:43,723 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13] total 25 [2025-01-09 03:18:43,723 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1717526701] [2025-01-09 03:18:43,723 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2025-01-09 03:18:43,723 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2025-01-09 03:18:43,723 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-09 03:18:43,724 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2025-01-09 03:18:43,724 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=488, Unknown=0, NotChecked=0, Total=600 [2025-01-09 03:18:43,724 INFO L87 Difference]: Start difference. First operand 162 states and 242 transitions. Second operand has 25 states, 21 states have (on average 1.619047619047619) internal successors, (34), 21 states have internal predecessors, (34), 11 states have call successors, (33), 3 states have call predecessors, (33), 3 states have return successors, (32), 12 states have call predecessors, (32), 10 states have call successors, (32) [2025-01-09 03:18:47,738 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2025-01-09 03:18:51,901 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2025-01-09 03:18:56,014 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2025-01-09 03:19:08,409 WARN L286 SmtUtils]: Spent 11.21s on a formula simplification. DAG size of input: 75 DAG size of output: 74 (called from [L 388] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2025-01-09 03:19:13,317 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2025-01-09 03:19:17,575 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2025-01-09 03:19:21,579 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2025-01-09 03:19:25,583 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2025-01-09 03:19:34,119 WARN L286 SmtUtils]: Spent 8.19s on a formula simplification. DAG size of input: 63 DAG size of output: 62 (called from [L 388] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2025-01-09 03:19:46,589 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers []