./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/array-patterns/array4_pattern.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 48c9605d Calling Ultimate with: /root/.sdkman/candidates/java/21.0.5-tem/bin/java -Dosgi.configuration.area=/storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.6.800.v20240513-1750.jar -data @noDefault -ultimatedata /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/array-patterns/array4_pattern.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 51462516d41bb1edc1c2003475b488124e11e4eb166822052c5d908cea262957 --- Real Ultimate output --- This is Ultimate 0.3.0-?-48c9605-m [2025-02-07 17:14:13,345 INFO L188 SettingsManager]: Resetting all preferences to default values... [2025-02-07 17:14:13,378 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2025-02-07 17:14:13,381 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2025-02-07 17:14:13,382 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2025-02-07 17:14:13,398 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2025-02-07 17:14:13,399 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2025-02-07 17:14:13,399 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2025-02-07 17:14:13,400 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2025-02-07 17:14:13,401 INFO L153 SettingsManager]: * Use memory slicer=true [2025-02-07 17:14:13,401 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2025-02-07 17:14:13,401 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2025-02-07 17:14:13,402 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2025-02-07 17:14:13,402 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2025-02-07 17:14:13,402 INFO L153 SettingsManager]: * Use SBE=true [2025-02-07 17:14:13,402 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2025-02-07 17:14:13,402 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2025-02-07 17:14:13,402 INFO L153 SettingsManager]: * sizeof long=4 [2025-02-07 17:14:13,402 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2025-02-07 17:14:13,402 INFO L153 SettingsManager]: * sizeof POINTER=4 [2025-02-07 17:14:13,402 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2025-02-07 17:14:13,402 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2025-02-07 17:14:13,403 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2025-02-07 17:14:13,403 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2025-02-07 17:14:13,403 INFO L153 SettingsManager]: * sizeof long double=12 [2025-02-07 17:14:13,403 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2025-02-07 17:14:13,403 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2025-02-07 17:14:13,403 INFO L153 SettingsManager]: * Use constant arrays=true [2025-02-07 17:14:13,403 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2025-02-07 17:14:13,403 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2025-02-07 17:14:13,403 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2025-02-07 17:14:13,403 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2025-02-07 17:14:13,404 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-02-07 17:14:13,404 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2025-02-07 17:14:13,404 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2025-02-07 17:14:13,404 INFO L153 SettingsManager]: * Compute procedure contracts=false [2025-02-07 17:14:13,404 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2025-02-07 17:14:13,404 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2025-02-07 17:14:13,404 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2025-02-07 17:14:13,404 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2025-02-07 17:14:13,404 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2025-02-07 17:14:13,404 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2025-02-07 17:14:13,404 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2025-02-07 17:14:13,404 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 -> 51462516d41bb1edc1c2003475b488124e11e4eb166822052c5d908cea262957 [2025-02-07 17:14:13,623 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2025-02-07 17:14:13,631 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2025-02-07 17:14:13,633 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2025-02-07 17:14:13,633 INFO L270 PluginConnector]: Initializing CDTParser... [2025-02-07 17:14:13,634 INFO L274 PluginConnector]: CDTParser initialized [2025-02-07 17:14:13,634 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-patterns/array4_pattern.c [2025-02-07 17:14:14,761 INFO L533 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/18ee2fbc8/2146cc0a52474638ba8cbd24ee690154/FLAGb7e8dc555 [2025-02-07 17:14:14,985 INFO L384 CDTParser]: Found 1 translation units. [2025-02-07 17:14:14,985 INFO L180 CDTParser]: Scanning /storage/repos/ultimate-jdk21/releaseScripts/default/sv-benchmarks/c/array-patterns/array4_pattern.c [2025-02-07 17:14:14,992 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/18ee2fbc8/2146cc0a52474638ba8cbd24ee690154/FLAGb7e8dc555 [2025-02-07 17:14:15,318 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/18ee2fbc8/2146cc0a52474638ba8cbd24ee690154 [2025-02-07 17:14:15,320 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2025-02-07 17:14:15,321 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2025-02-07 17:14:15,326 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2025-02-07 17:14:15,326 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2025-02-07 17:14:15,329 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2025-02-07 17:14:15,329 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.02 05:14:15" (1/1) ... [2025-02-07 17:14:15,331 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4479722 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 05:14:15, skipping insertion in model container [2025-02-07 17:14:15,331 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.02 05:14:15" (1/1) ... [2025-02-07 17:14:15,343 INFO L175 MainTranslator]: Built tables and reachable declarations [2025-02-07 17:14:15,427 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/array-patterns/array4_pattern.c[1835,1848] [2025-02-07 17:14:15,443 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-02-07 17:14:15,450 INFO L200 MainTranslator]: Completed pre-run [2025-02-07 17:14:15,457 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/array-patterns/array4_pattern.c[1835,1848] [2025-02-07 17:14:15,463 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-02-07 17:14:15,472 INFO L204 MainTranslator]: Completed translation [2025-02-07 17:14:15,472 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 05:14:15 WrapperNode [2025-02-07 17:14:15,472 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2025-02-07 17:14:15,473 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2025-02-07 17:14:15,473 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2025-02-07 17:14:15,473 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2025-02-07 17:14:15,477 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 05:14:15" (1/1) ... [2025-02-07 17:14:15,481 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 05:14:15" (1/1) ... [2025-02-07 17:14:15,491 INFO L138 Inliner]: procedures = 16, calls = 27, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 87 [2025-02-07 17:14:15,491 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2025-02-07 17:14:15,492 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2025-02-07 17:14:15,492 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2025-02-07 17:14:15,492 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2025-02-07 17:14:15,497 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 05:14:15" (1/1) ... [2025-02-07 17:14:15,497 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 05:14:15" (1/1) ... [2025-02-07 17:14:15,502 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 05:14:15" (1/1) ... [2025-02-07 17:14:15,509 INFO L175 MemorySlicer]: Split 10 memory accesses to 3 slices as follows [2, 4, 4]. 40 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0, 0]. The 4 writes are split as follows [0, 2, 2]. [2025-02-07 17:14:15,509 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 05:14:15" (1/1) ... [2025-02-07 17:14:15,509 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 05:14:15" (1/1) ... [2025-02-07 17:14:15,513 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 05:14:15" (1/1) ... [2025-02-07 17:14:15,513 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 05:14:15" (1/1) ... [2025-02-07 17:14:15,514 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 05:14:15" (1/1) ... [2025-02-07 17:14:15,514 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 05:14:15" (1/1) ... [2025-02-07 17:14:15,515 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2025-02-07 17:14:15,516 INFO L112 PluginConnector]: ------------------------IcfgBuilder---------------------------- [2025-02-07 17:14:15,516 INFO L270 PluginConnector]: Initializing IcfgBuilder... [2025-02-07 17:14:15,516 INFO L274 PluginConnector]: IcfgBuilder initialized [2025-02-07 17:14:15,517 INFO L184 PluginConnector]: Executing the observer IcfgBuilderObserver from plugin IcfgBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 05:14:15" (1/1) ... [2025-02-07 17:14:15,520 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-02-07 17:14:15,528 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-07 17:14:15,542 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2025-02-07 17:14:15,544 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2025-02-07 17:14:15,558 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2025-02-07 17:14:15,558 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2025-02-07 17:14:15,559 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2025-02-07 17:14:15,559 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2025-02-07 17:14:15,559 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2025-02-07 17:14:15,559 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2025-02-07 17:14:15,559 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2025-02-07 17:14:15,559 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2025-02-07 17:14:15,559 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2025-02-07 17:14:15,559 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2025-02-07 17:14:15,559 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2025-02-07 17:14:15,559 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2025-02-07 17:14:15,559 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2025-02-07 17:14:15,559 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2025-02-07 17:14:15,559 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2025-02-07 17:14:15,559 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2025-02-07 17:14:15,605 INFO L257 CfgBuilder]: Building ICFG [2025-02-07 17:14:15,606 INFO L287 CfgBuilder]: Building CFG for each procedure with an implementation [2025-02-07 17:14:15,711 INFO L1324 $ProcedureCfgBuilder]: dead code at ProgramPoint L51: call ULTIMATE.dealloc(main_~#array1~0#1.base, main_~#array1~0#1.offset);havoc main_~#array1~0#1.base, main_~#array1~0#1.offset;call ULTIMATE.dealloc(main_~#array2~0#1.base, main_~#array2~0#1.offset);havoc main_~#array2~0#1.base, main_~#array2~0#1.offset; [2025-02-07 17:14:15,717 INFO L? ?]: Removed 12 outVars from TransFormulas that were not future-live. [2025-02-07 17:14:15,717 INFO L308 CfgBuilder]: Performing block encoding [2025-02-07 17:14:15,722 INFO L332 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2025-02-07 17:14:15,722 INFO L337 CfgBuilder]: Removed 0 assume(true) statements. [2025-02-07 17:14:15,723 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 07.02 05:14:15 BoogieIcfgContainer [2025-02-07 17:14:15,723 INFO L131 PluginConnector]: ------------------------ END IcfgBuilder---------------------------- [2025-02-07 17:14:15,724 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2025-02-07 17:14:15,724 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2025-02-07 17:14:15,727 INFO L274 PluginConnector]: TraceAbstraction initialized [2025-02-07 17:14:15,727 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.02 05:14:15" (1/3) ... [2025-02-07 17:14:15,727 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@a09c51f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.02 05:14:15, skipping insertion in model container [2025-02-07 17:14:15,727 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 05:14:15" (2/3) ... [2025-02-07 17:14:15,728 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@a09c51f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.02 05:14:15, skipping insertion in model container [2025-02-07 17:14:15,728 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 07.02 05:14:15" (3/3) ... [2025-02-07 17:14:15,728 INFO L128 eAbstractionObserver]: Analyzing ICFG array4_pattern.c [2025-02-07 17:14:15,737 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2025-02-07 17:14:15,738 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG array4_pattern.c that has 2 procedures, 28 locations, 1 initial locations, 3 loop locations, and 1 error locations. [2025-02-07 17:14:15,767 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2025-02-07 17:14:15,774 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;@746c53f0, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2025-02-07 17:14:15,774 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2025-02-07 17:14:15,777 INFO L276 IsEmpty]: Start isEmpty. Operand has 28 states, 20 states have (on average 1.4) internal successors, (28), 21 states have internal predecessors, (28), 5 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2025-02-07 17:14:15,781 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2025-02-07 17:14:15,782 INFO L210 NwaCegarLoop]: Found error trace [2025-02-07 17:14:15,782 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-07 17:14:15,782 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-07 17:14:15,785 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-07 17:14:15,786 INFO L85 PathProgramCache]: Analyzing trace with hash 1204921481, now seen corresponding path program 1 times [2025-02-07 17:14:15,791 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-07 17:14:15,793 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [942649453] [2025-02-07 17:14:15,793 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-07 17:14:15,793 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-07 17:14:15,851 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 13 statements into 1 equivalence classes. [2025-02-07 17:14:15,861 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 13 of 13 statements. [2025-02-07 17:14:15,862 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-07 17:14:15,862 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 17:14:15,893 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-07 17:14:15,894 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-07 17:14:15,895 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [942649453] [2025-02-07 17:14:15,896 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [942649453] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-07 17:14:15,896 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-07 17:14:15,896 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2025-02-07 17:14:15,897 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [570054091] [2025-02-07 17:14:15,898 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-07 17:14:15,900 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2025-02-07 17:14:15,900 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-07 17:14:15,914 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2025-02-07 17:14:15,915 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2025-02-07 17:14:15,916 INFO L87 Difference]: Start difference. First operand has 28 states, 20 states have (on average 1.4) internal successors, (28), 21 states have internal predecessors, (28), 5 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) Second operand has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2025-02-07 17:14:15,926 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-07 17:14:15,927 INFO L93 Difference]: Finished difference Result 54 states and 78 transitions. [2025-02-07 17:14:15,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2025-02-07 17:14:15,928 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 13 [2025-02-07 17:14:15,928 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-07 17:14:15,931 INFO L225 Difference]: With dead ends: 54 [2025-02-07 17:14:15,931 INFO L226 Difference]: Without dead ends: 24 [2025-02-07 17:14:15,933 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2025-02-07 17:14:15,935 INFO L435 NwaCegarLoop]: 35 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-02-07 17:14:15,935 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-02-07 17:14:15,943 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2025-02-07 17:14:15,951 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2025-02-07 17:14:15,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 17 states have (on average 1.2352941176470589) internal successors, (21), 17 states have internal predecessors, (21), 5 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2025-02-07 17:14:15,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 31 transitions. [2025-02-07 17:14:15,955 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 31 transitions. Word has length 13 [2025-02-07 17:14:15,956 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-07 17:14:15,956 INFO L471 AbstractCegarLoop]: Abstraction has 24 states and 31 transitions. [2025-02-07 17:14:15,956 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2025-02-07 17:14:15,956 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 31 transitions. [2025-02-07 17:14:15,957 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2025-02-07 17:14:15,957 INFO L210 NwaCegarLoop]: Found error trace [2025-02-07 17:14:15,957 INFO L218 NwaCegarLoop]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-07 17:14:15,958 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2025-02-07 17:14:15,958 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-07 17:14:15,958 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-07 17:14:15,959 INFO L85 PathProgramCache]: Analyzing trace with hash -1395749701, now seen corresponding path program 1 times [2025-02-07 17:14:15,959 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-07 17:14:15,959 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [645463768] [2025-02-07 17:14:15,959 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-07 17:14:15,959 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-07 17:14:15,982 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 39 statements into 1 equivalence classes. [2025-02-07 17:14:16,004 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 39 of 39 statements. [2025-02-07 17:14:16,005 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-07 17:14:16,005 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 17:14:16,099 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2025-02-07 17:14:16,099 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-07 17:14:16,099 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [645463768] [2025-02-07 17:14:16,099 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [645463768] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-07 17:14:16,099 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-07 17:14:16,099 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2025-02-07 17:14:16,099 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [73338099] [2025-02-07 17:14:16,100 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-07 17:14:16,101 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2025-02-07 17:14:16,101 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-07 17:14:16,102 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2025-02-07 17:14:16,103 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-02-07 17:14:16,103 INFO L87 Difference]: Start difference. First operand 24 states and 31 transitions. Second operand has 3 states, 3 states have (on average 5.666666666666667) internal successors, (17), 3 states have internal predecessors, (17), 2 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2025-02-07 17:14:16,144 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-07 17:14:16,145 INFO L93 Difference]: Finished difference Result 54 states and 71 transitions. [2025-02-07 17:14:16,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-02-07 17:14:16,145 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.666666666666667) internal successors, (17), 3 states have internal predecessors, (17), 2 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 39 [2025-02-07 17:14:16,147 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-07 17:14:16,147 INFO L225 Difference]: With dead ends: 54 [2025-02-07 17:14:16,147 INFO L226 Difference]: Without dead ends: 34 [2025-02-07 17:14:16,148 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-02-07 17:14:16,148 INFO L435 NwaCegarLoop]: 28 mSDtfsCounter, 1 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-02-07 17:14:16,148 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 48 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-02-07 17:14:16,149 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2025-02-07 17:14:16,152 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 33. [2025-02-07 17:14:16,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 22 states have (on average 1.1818181818181819) internal successors, (26), 22 states have internal predecessors, (26), 9 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2025-02-07 17:14:16,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 44 transitions. [2025-02-07 17:14:16,154 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 44 transitions. Word has length 39 [2025-02-07 17:14:16,154 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-07 17:14:16,154 INFO L471 AbstractCegarLoop]: Abstraction has 33 states and 44 transitions. [2025-02-07 17:14:16,154 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.666666666666667) internal successors, (17), 3 states have internal predecessors, (17), 2 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2025-02-07 17:14:16,155 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 44 transitions. [2025-02-07 17:14:16,155 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2025-02-07 17:14:16,155 INFO L210 NwaCegarLoop]: Found error trace [2025-02-07 17:14:16,155 INFO L218 NwaCegarLoop]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-07 17:14:16,155 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2025-02-07 17:14:16,155 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-07 17:14:16,156 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-07 17:14:16,156 INFO L85 PathProgramCache]: Analyzing trace with hash -508246020, now seen corresponding path program 1 times [2025-02-07 17:14:16,156 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-07 17:14:16,156 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [176510298] [2025-02-07 17:14:16,156 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-07 17:14:16,156 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-07 17:14:16,166 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 39 statements into 1 equivalence classes. [2025-02-07 17:14:16,176 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 39 of 39 statements. [2025-02-07 17:14:16,176 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-07 17:14:16,177 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 17:14:16,298 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2025-02-07 17:14:16,298 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-07 17:14:16,299 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [176510298] [2025-02-07 17:14:16,299 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [176510298] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-07 17:14:16,299 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-07 17:14:16,299 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2025-02-07 17:14:16,299 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [567251695] [2025-02-07 17:14:16,299 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-07 17:14:16,299 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-02-07 17:14:16,299 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-07 17:14:16,299 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-02-07 17:14:16,299 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2025-02-07 17:14:16,300 INFO L87 Difference]: Start difference. First operand 33 states and 44 transitions. Second operand has 4 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2025-02-07 17:14:16,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-07 17:14:16,319 INFO L93 Difference]: Finished difference Result 37 states and 48 transitions. [2025-02-07 17:14:16,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-02-07 17:14:16,322 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 39 [2025-02-07 17:14:16,323 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-07 17:14:16,323 INFO L225 Difference]: With dead ends: 37 [2025-02-07 17:14:16,323 INFO L226 Difference]: Without dead ends: 34 [2025-02-07 17:14:16,323 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2025-02-07 17:14:16,324 INFO L435 NwaCegarLoop]: 29 mSDtfsCounter, 3 mSDsluCounter, 39 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 68 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-02-07 17:14:16,324 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 68 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-02-07 17:14:16,324 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2025-02-07 17:14:16,330 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2025-02-07 17:14:16,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 23 states have (on average 1.173913043478261) internal successors, (27), 23 states have internal predecessors, (27), 9 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2025-02-07 17:14:16,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 45 transitions. [2025-02-07 17:14:16,331 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 45 transitions. Word has length 39 [2025-02-07 17:14:16,331 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-07 17:14:16,331 INFO L471 AbstractCegarLoop]: Abstraction has 34 states and 45 transitions. [2025-02-07 17:14:16,331 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2025-02-07 17:14:16,331 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 45 transitions. [2025-02-07 17:14:16,332 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2025-02-07 17:14:16,332 INFO L210 NwaCegarLoop]: Found error trace [2025-02-07 17:14:16,332 INFO L218 NwaCegarLoop]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-07 17:14:16,332 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2025-02-07 17:14:16,332 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-07 17:14:16,333 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-07 17:14:16,333 INFO L85 PathProgramCache]: Analyzing trace with hash 1424274317, now seen corresponding path program 1 times [2025-02-07 17:14:16,333 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-07 17:14:16,333 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1155321996] [2025-02-07 17:14:16,333 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-07 17:14:16,333 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-07 17:14:16,342 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 40 statements into 1 equivalence classes. [2025-02-07 17:14:16,353 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 40 of 40 statements. [2025-02-07 17:14:16,353 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-07 17:14:16,353 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 17:14:16,449 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2025-02-07 17:14:16,450 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-07 17:14:16,450 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1155321996] [2025-02-07 17:14:16,451 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1155321996] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-07 17:14:16,451 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-07 17:14:16,451 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2025-02-07 17:14:16,451 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1832065306] [2025-02-07 17:14:16,451 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-07 17:14:16,451 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-02-07 17:14:16,451 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-07 17:14:16,452 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-02-07 17:14:16,452 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2025-02-07 17:14:16,452 INFO L87 Difference]: Start difference. First operand 34 states and 45 transitions. Second operand has 5 states, 5 states have (on average 3.6) internal successors, (18), 5 states have internal predecessors, (18), 2 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2025-02-07 17:14:16,525 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-07 17:14:16,525 INFO L93 Difference]: Finished difference Result 67 states and 88 transitions. [2025-02-07 17:14:16,526 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-02-07 17:14:16,527 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 5 states have internal predecessors, (18), 2 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 40 [2025-02-07 17:14:16,527 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-07 17:14:16,527 INFO L225 Difference]: With dead ends: 67 [2025-02-07 17:14:16,527 INFO L226 Difference]: Without dead ends: 36 [2025-02-07 17:14:16,528 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2025-02-07 17:14:16,530 INFO L435 NwaCegarLoop]: 29 mSDtfsCounter, 8 mSDsluCounter, 55 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 84 SdHoareTripleChecker+Invalid, 53 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-02-07 17:14:16,530 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 84 Invalid, 53 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-02-07 17:14:16,531 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2025-02-07 17:14:16,534 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 35. [2025-02-07 17:14:16,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 24 states have (on average 1.1666666666666667) internal successors, (28), 24 states have internal predecessors, (28), 9 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2025-02-07 17:14:16,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 46 transitions. [2025-02-07 17:14:16,536 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 46 transitions. Word has length 40 [2025-02-07 17:14:16,537 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-07 17:14:16,537 INFO L471 AbstractCegarLoop]: Abstraction has 35 states and 46 transitions. [2025-02-07 17:14:16,537 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 5 states have internal predecessors, (18), 2 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2025-02-07 17:14:16,537 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 46 transitions. [2025-02-07 17:14:16,537 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2025-02-07 17:14:16,538 INFO L210 NwaCegarLoop]: Found error trace [2025-02-07 17:14:16,538 INFO L218 NwaCegarLoop]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-07 17:14:16,538 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2025-02-07 17:14:16,538 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-07 17:14:16,538 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-07 17:14:16,538 INFO L85 PathProgramCache]: Analyzing trace with hash 340699335, now seen corresponding path program 1 times [2025-02-07 17:14:16,538 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-07 17:14:16,539 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1120754385] [2025-02-07 17:14:16,539 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-07 17:14:16,539 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-07 17:14:16,554 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 41 statements into 1 equivalence classes. [2025-02-07 17:14:16,577 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 41 of 41 statements. [2025-02-07 17:14:16,577 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-07 17:14:16,577 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unknown [2025-02-07 17:14:16,579 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [619458259] [2025-02-07 17:14:16,579 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-07 17:14:16,579 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-07 17:14:16,579 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-07 17:14:16,590 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-07 17:14:16,596 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2025-02-07 17:14:16,652 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 41 statements into 1 equivalence classes. [2025-02-07 17:14:16,682 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 41 of 41 statements. [2025-02-07 17:14:16,682 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-07 17:14:16,682 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 17:14:16,690 INFO L256 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 35 conjuncts are in the unsatisfiable core [2025-02-07 17:14:16,695 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-07 17:14:16,764 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2025-02-07 17:14:17,333 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 9 [2025-02-07 17:14:17,363 INFO L349 Elim1Store]: treesize reduction 48, result has 32.4 percent of original size [2025-02-07 17:14:17,364 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 33 treesize of output 39 [2025-02-07 17:14:17,467 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 20 proven. 18 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2025-02-07 17:14:17,468 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-07 17:14:17,523 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 32 [2025-02-07 17:14:17,526 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 56 treesize of output 54 [2025-02-07 17:14:17,802 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-07 17:14:17,803 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1120754385] [2025-02-07 17:14:17,803 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2025-02-07 17:14:17,803 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [619458259] [2025-02-07 17:14:17,803 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [619458259] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-07 17:14:17,803 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2025-02-07 17:14:17,803 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2025-02-07 17:14:17,803 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2065568478] [2025-02-07 17:14:17,804 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2025-02-07 17:14:17,804 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2025-02-07 17:14:17,804 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-07 17:14:17,804 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2025-02-07 17:14:17,805 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=505, Unknown=0, NotChecked=0, Total=600 [2025-02-07 17:14:17,805 INFO L87 Difference]: Start difference. First operand 35 states and 46 transitions. Second operand has 18 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 15 states have internal predecessors, (28), 4 states have call successors, (5), 4 states have call predecessors, (5), 4 states have return successors, (5), 3 states have call predecessors, (5), 4 states have call successors, (5) [2025-02-07 17:14:18,028 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-07 17:14:18,028 INFO L93 Difference]: Finished difference Result 73 states and 91 transitions. [2025-02-07 17:14:18,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2025-02-07 17:14:18,029 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 15 states have internal predecessors, (28), 4 states have call successors, (5), 4 states have call predecessors, (5), 4 states have return successors, (5), 3 states have call predecessors, (5), 4 states have call successors, (5) Word has length 41 [2025-02-07 17:14:18,029 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-07 17:14:18,030 INFO L225 Difference]: With dead ends: 73 [2025-02-07 17:14:18,030 INFO L226 Difference]: Without dead ends: 70 [2025-02-07 17:14:18,030 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 40 SyntacticMatches, 4 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 267 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=117, Invalid=585, Unknown=0, NotChecked=0, Total=702 [2025-02-07 17:14:18,031 INFO L435 NwaCegarLoop]: 33 mSDtfsCounter, 38 mSDsluCounter, 110 mSDsCounter, 0 mSdLazyCounter, 215 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 143 SdHoareTripleChecker+Invalid, 239 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 215 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2025-02-07 17:14:18,031 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [47 Valid, 143 Invalid, 239 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 215 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2025-02-07 17:14:18,031 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2025-02-07 17:14:18,038 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 61. [2025-02-07 17:14:18,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 43 states have (on average 1.1395348837209303) internal successors, (49), 43 states have internal predecessors, (49), 13 states have call successors, (13), 4 states have call predecessors, (13), 4 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2025-02-07 17:14:18,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 75 transitions. [2025-02-07 17:14:18,039 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 75 transitions. Word has length 41 [2025-02-07 17:14:18,039 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-07 17:14:18,039 INFO L471 AbstractCegarLoop]: Abstraction has 61 states and 75 transitions. [2025-02-07 17:14:18,039 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 15 states have internal predecessors, (28), 4 states have call successors, (5), 4 states have call predecessors, (5), 4 states have return successors, (5), 3 states have call predecessors, (5), 4 states have call successors, (5) [2025-02-07 17:14:18,039 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 75 transitions. [2025-02-07 17:14:18,040 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2025-02-07 17:14:18,040 INFO L210 NwaCegarLoop]: Found error trace [2025-02-07 17:14:18,040 INFO L218 NwaCegarLoop]: trace histogram [5, 5, 5, 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] [2025-02-07 17:14:18,048 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2025-02-07 17:14:18,244 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-07 17:14:18,244 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-07 17:14:18,245 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-07 17:14:18,245 INFO L85 PathProgramCache]: Analyzing trace with hash 1971776546, now seen corresponding path program 2 times [2025-02-07 17:14:18,245 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-07 17:14:18,245 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [764350659] [2025-02-07 17:14:18,245 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-07 17:14:18,245 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-07 17:14:18,254 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 42 statements into 2 equivalence classes. [2025-02-07 17:14:18,262 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 42 of 42 statements. [2025-02-07 17:14:18,262 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-02-07 17:14:18,262 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 17:14:18,341 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2025-02-07 17:14:18,341 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-07 17:14:18,341 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [764350659] [2025-02-07 17:14:18,341 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [764350659] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-07 17:14:18,341 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [421985101] [2025-02-07 17:14:18,341 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-07 17:14:18,341 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-07 17:14:18,341 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-07 17:14:18,345 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-07 17:14:18,346 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2025-02-07 17:14:18,385 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 42 statements into 2 equivalence classes. [2025-02-07 17:14:18,402 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 42 of 42 statements. [2025-02-07 17:14:18,402 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-02-07 17:14:18,402 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 17:14:18,403 INFO L256 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 6 conjuncts are in the unsatisfiable core [2025-02-07 17:14:18,406 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-07 17:14:18,460 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 19 proven. 1 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2025-02-07 17:14:18,460 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-07 17:14:18,509 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2025-02-07 17:14:18,510 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [421985101] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-07 17:14:18,510 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-07 17:14:18,510 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 11 [2025-02-07 17:14:18,510 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1424220913] [2025-02-07 17:14:18,510 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-07 17:14:18,511 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2025-02-07 17:14:18,511 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-07 17:14:18,511 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2025-02-07 17:14:18,511 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2025-02-07 17:14:18,511 INFO L87 Difference]: Start difference. First operand 61 states and 75 transitions. Second operand has 11 states, 11 states have (on average 2.727272727272727) internal successors, (30), 11 states have internal predecessors, (30), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2025-02-07 17:14:18,643 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-07 17:14:18,643 INFO L93 Difference]: Finished difference Result 131 states and 168 transitions. [2025-02-07 17:14:18,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2025-02-07 17:14:18,643 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.727272727272727) internal successors, (30), 11 states have internal predecessors, (30), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) Word has length 42 [2025-02-07 17:14:18,643 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-07 17:14:18,644 INFO L225 Difference]: With dead ends: 131 [2025-02-07 17:14:18,644 INFO L226 Difference]: Without dead ends: 107 [2025-02-07 17:14:18,644 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 77 SyntacticMatches, 3 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2025-02-07 17:14:18,645 INFO L435 NwaCegarLoop]: 25 mSDtfsCounter, 40 mSDsluCounter, 102 mSDsCounter, 0 mSdLazyCounter, 123 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 127 SdHoareTripleChecker+Invalid, 160 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 123 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-02-07 17:14:18,645 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [48 Valid, 127 Invalid, 160 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 123 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-02-07 17:14:18,645 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2025-02-07 17:14:18,654 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 97. [2025-02-07 17:14:18,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 66 states have (on average 1.1363636363636365) internal successors, (75), 67 states have internal predecessors, (75), 25 states have call successors, (25), 5 states have call predecessors, (25), 5 states have return successors, (25), 24 states have call predecessors, (25), 25 states have call successors, (25) [2025-02-07 17:14:18,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 125 transitions. [2025-02-07 17:14:18,655 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 125 transitions. Word has length 42 [2025-02-07 17:14:18,658 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-07 17:14:18,658 INFO L471 AbstractCegarLoop]: Abstraction has 97 states and 125 transitions. [2025-02-07 17:14:18,658 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.727272727272727) internal successors, (30), 11 states have internal predecessors, (30), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2025-02-07 17:14:18,658 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 125 transitions. [2025-02-07 17:14:18,658 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2025-02-07 17:14:18,658 INFO L210 NwaCegarLoop]: Found error trace [2025-02-07 17:14:18,658 INFO L218 NwaCegarLoop]: trace histogram [5, 5, 5, 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] [2025-02-07 17:14:18,671 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2025-02-07 17:14:18,859 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,3 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-07 17:14:18,859 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-07 17:14:18,860 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-07 17:14:18,860 INFO L85 PathProgramCache]: Analyzing trace with hash 1109613261, now seen corresponding path program 3 times [2025-02-07 17:14:18,860 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-07 17:14:18,860 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [486718180] [2025-02-07 17:14:18,860 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-02-07 17:14:18,861 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-07 17:14:18,869 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 42 statements into 6 equivalence classes. [2025-02-07 17:14:18,897 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) and asserted 42 of 42 statements. [2025-02-07 17:14:18,899 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2025-02-07 17:14:18,899 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 17:14:19,016 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2025-02-07 17:14:19,016 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-07 17:14:19,016 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [486718180] [2025-02-07 17:14:19,017 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [486718180] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-07 17:14:19,017 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1009711404] [2025-02-07 17:14:19,017 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-02-07 17:14:19,017 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-07 17:14:19,017 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-07 17:14:19,019 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-07 17:14:19,020 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2025-02-07 17:14:19,061 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 42 statements into 6 equivalence classes. [2025-02-07 17:14:19,090 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) and asserted 40 of 42 statements. [2025-02-07 17:14:19,090 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2025-02-07 17:14:19,090 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 17:14:19,091 INFO L256 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 28 conjuncts are in the unsatisfiable core [2025-02-07 17:14:19,095 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-07 17:14:19,384 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2025-02-07 17:14:19,395 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2025-02-07 17:14:19,572 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-02-07 17:14:19,572 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 25 [2025-02-07 17:14:19,581 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-02-07 17:14:19,581 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 24 [2025-02-07 17:14:19,657 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 21 proven. 13 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2025-02-07 17:14:19,657 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-07 17:14:19,791 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 40 [2025-02-07 17:14:19,794 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 38 [2025-02-07 17:14:19,797 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 64 treesize of output 58 [2025-02-07 17:14:19,800 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 76 treesize of output 64 [2025-02-07 17:14:20,248 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 9 proven. 13 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2025-02-07 17:14:20,249 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1009711404] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-07 17:14:20,249 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-07 17:14:20,249 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 15, 14] total 31 [2025-02-07 17:14:20,249 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [178986421] [2025-02-07 17:14:20,249 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-07 17:14:20,250 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2025-02-07 17:14:20,250 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-07 17:14:20,250 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2025-02-07 17:14:20,251 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=145, Invalid=785, Unknown=0, NotChecked=0, Total=930 [2025-02-07 17:14:20,251 INFO L87 Difference]: Start difference. First operand 97 states and 125 transitions. Second operand has 31 states, 29 states have (on average 2.1379310344827585) internal successors, (62), 29 states have internal predecessors, (62), 8 states have call successors, (13), 2 states have call predecessors, (13), 6 states have return successors, (13), 6 states have call predecessors, (13), 8 states have call successors, (13) [2025-02-07 17:14:21,547 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-07 17:14:21,547 INFO L93 Difference]: Finished difference Result 132 states and 169 transitions. [2025-02-07 17:14:21,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2025-02-07 17:14:21,548 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 29 states have (on average 2.1379310344827585) internal successors, (62), 29 states have internal predecessors, (62), 8 states have call successors, (13), 2 states have call predecessors, (13), 6 states have return successors, (13), 6 states have call predecessors, (13), 8 states have call successors, (13) Word has length 42 [2025-02-07 17:14:21,548 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-07 17:14:21,550 INFO L225 Difference]: With dead ends: 132 [2025-02-07 17:14:21,550 INFO L226 Difference]: Without dead ends: 67 [2025-02-07 17:14:21,551 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 59 SyntacticMatches, 1 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 823 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=616, Invalid=2806, Unknown=0, NotChecked=0, Total=3422 [2025-02-07 17:14:21,551 INFO L435 NwaCegarLoop]: 39 mSDtfsCounter, 167 mSDsluCounter, 264 mSDsCounter, 0 mSdLazyCounter, 806 mSolverCounterSat, 168 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 167 SdHoareTripleChecker+Valid, 303 SdHoareTripleChecker+Invalid, 974 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 168 IncrementalHoareTripleChecker+Valid, 806 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2025-02-07 17:14:21,552 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [167 Valid, 303 Invalid, 974 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [168 Valid, 806 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2025-02-07 17:14:21,552 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2025-02-07 17:14:21,558 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 54. [2025-02-07 17:14:21,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 37 states have (on average 1.135135135135135) internal successors, (42), 38 states have internal predecessors, (42), 13 states have call successors, (13), 3 states have call predecessors, (13), 3 states have return successors, (13), 12 states have call predecessors, (13), 13 states have call successors, (13) [2025-02-07 17:14:21,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 68 transitions. [2025-02-07 17:14:21,559 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 68 transitions. Word has length 42 [2025-02-07 17:14:21,559 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-07 17:14:21,559 INFO L471 AbstractCegarLoop]: Abstraction has 54 states and 68 transitions. [2025-02-07 17:14:21,559 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 29 states have (on average 2.1379310344827585) internal successors, (62), 29 states have internal predecessors, (62), 8 states have call successors, (13), 2 states have call predecessors, (13), 6 states have return successors, (13), 6 states have call predecessors, (13), 8 states have call successors, (13) [2025-02-07 17:14:21,559 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 68 transitions. [2025-02-07 17:14:21,559 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2025-02-07 17:14:21,559 INFO L210 NwaCegarLoop]: Found error trace [2025-02-07 17:14:21,560 INFO L218 NwaCegarLoop]: trace histogram [5, 5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-07 17:14:21,566 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2025-02-07 17:14:21,764 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-07 17:14:21,764 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-07 17:14:21,764 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-07 17:14:21,765 INFO L85 PathProgramCache]: Analyzing trace with hash 38304476, now seen corresponding path program 4 times [2025-02-07 17:14:21,765 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-07 17:14:21,765 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1133996376] [2025-02-07 17:14:21,765 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-02-07 17:14:21,765 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-07 17:14:21,770 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 43 statements into 2 equivalence classes. [2025-02-07 17:14:21,812 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 43 of 43 statements. [2025-02-07 17:14:21,812 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-02-07 17:14:21,812 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unknown [2025-02-07 17:14:21,813 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [273668462] [2025-02-07 17:14:21,813 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-02-07 17:14:21,813 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-07 17:14:21,813 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-07 17:14:21,815 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-07 17:14:21,816 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2025-02-07 17:14:21,851 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 43 statements into 2 equivalence classes. [2025-02-07 17:14:21,875 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 43 of 43 statements. [2025-02-07 17:14:21,875 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-02-07 17:14:21,875 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 17:14:21,880 INFO L256 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 60 conjuncts are in the unsatisfiable core [2025-02-07 17:14:21,885 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-07 17:14:21,900 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2025-02-07 17:14:21,906 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2025-02-07 17:14:21,936 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2025-02-07 17:14:21,945 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2025-02-07 17:14:22,845 INFO L349 Elim1Store]: treesize reduction 80, result has 36.0 percent of original size [2025-02-07 17:14:22,845 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 10 case distinctions, treesize of input 42 treesize of output 66 [2025-02-07 17:14:22,926 INFO L349 Elim1Store]: treesize reduction 88, result has 33.8 percent of original size [2025-02-07 17:14:22,926 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 10 case distinctions, treesize of input 42 treesize of output 68 [2025-02-07 17:14:23,188 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-02-07 17:14:23,188 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 55 treesize of output 31 [2025-02-07 17:14:23,193 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-02-07 17:14:23,193 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 73 treesize of output 41 [2025-02-07 17:14:23,225 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 16 proven. 15 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2025-02-07 17:14:23,226 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-07 17:14:23,857 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-07 17:14:23,858 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1133996376] [2025-02-07 17:14:23,858 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2025-02-07 17:14:23,858 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [273668462] [2025-02-07 17:14:23,858 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [273668462] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-07 17:14:23,858 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2025-02-07 17:14:23,858 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2025-02-07 17:14:23,858 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [513752863] [2025-02-07 17:14:23,858 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2025-02-07 17:14:23,858 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2025-02-07 17:14:23,858 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-07 17:14:23,859 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2025-02-07 17:14:23,859 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=579, Unknown=0, NotChecked=0, Total=702 [2025-02-07 17:14:23,859 INFO L87 Difference]: Start difference. First operand 54 states and 68 transitions. Second operand has 17 states, 15 states have (on average 1.8) internal successors, (27), 16 states have internal predecessors, (27), 5 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (5), 3 states have call predecessors, (5), 5 states have call successors, (5) [2025-02-07 17:14:24,230 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-07 17:14:24,231 INFO L93 Difference]: Finished difference Result 87 states and 110 transitions. [2025-02-07 17:14:24,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2025-02-07 17:14:24,231 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 15 states have (on average 1.8) internal successors, (27), 16 states have internal predecessors, (27), 5 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (5), 3 states have call predecessors, (5), 5 states have call successors, (5) Word has length 43 [2025-02-07 17:14:24,231 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-07 17:14:24,232 INFO L225 Difference]: With dead ends: 87 [2025-02-07 17:14:24,232 INFO L226 Difference]: Without dead ends: 84 [2025-02-07 17:14:24,232 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 36 SyntacticMatches, 4 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 239 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=138, Invalid=674, Unknown=0, NotChecked=0, Total=812 [2025-02-07 17:14:24,233 INFO L435 NwaCegarLoop]: 29 mSDtfsCounter, 7 mSDsluCounter, 159 mSDsCounter, 0 mSdLazyCounter, 362 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 188 SdHoareTripleChecker+Invalid, 364 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 362 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2025-02-07 17:14:24,233 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 188 Invalid, 364 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 362 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2025-02-07 17:14:24,233 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2025-02-07 17:14:24,241 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 72. [2025-02-07 17:14:24,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 50 states have (on average 1.14) internal successors, (57), 51 states have internal predecessors, (57), 17 states have call successors, (17), 4 states have call predecessors, (17), 4 states have return successors, (17), 16 states have call predecessors, (17), 17 states have call successors, (17) [2025-02-07 17:14:24,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 91 transitions. [2025-02-07 17:14:24,242 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 91 transitions. Word has length 43 [2025-02-07 17:14:24,242 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-07 17:14:24,243 INFO L471 AbstractCegarLoop]: Abstraction has 72 states and 91 transitions. [2025-02-07 17:14:24,243 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 15 states have (on average 1.8) internal successors, (27), 16 states have internal predecessors, (27), 5 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (5), 3 states have call predecessors, (5), 5 states have call successors, (5) [2025-02-07 17:14:24,243 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 91 transitions. [2025-02-07 17:14:24,243 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2025-02-07 17:14:24,243 INFO L210 NwaCegarLoop]: Found error trace [2025-02-07 17:14:24,243 INFO L218 NwaCegarLoop]: trace histogram [5, 5, 5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-07 17:14:24,249 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2025-02-07 17:14:24,444 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2025-02-07 17:14:24,444 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-07 17:14:24,444 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-07 17:14:24,444 INFO L85 PathProgramCache]: Analyzing trace with hash 1187470509, now seen corresponding path program 5 times [2025-02-07 17:14:24,444 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-07 17:14:24,444 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1811868548] [2025-02-07 17:14:24,444 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-02-07 17:14:24,444 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-07 17:14:24,453 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 44 statements into 6 equivalence classes. [2025-02-07 17:14:24,480 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) and asserted 44 of 44 statements. [2025-02-07 17:14:24,481 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2025-02-07 17:14:24,481 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 17:14:24,566 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2025-02-07 17:14:24,566 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-07 17:14:24,566 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1811868548] [2025-02-07 17:14:24,566 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1811868548] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-07 17:14:24,566 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1037226340] [2025-02-07 17:14:24,566 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-02-07 17:14:24,566 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-07 17:14:24,566 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-07 17:14:24,568 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-07 17:14:24,569 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2025-02-07 17:14:24,606 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 44 statements into 6 equivalence classes. [2025-02-07 17:14:24,628 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) and asserted 44 of 44 statements. [2025-02-07 17:14:24,629 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2025-02-07 17:14:24,629 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 17:14:24,630 INFO L256 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 8 conjuncts are in the unsatisfiable core [2025-02-07 17:14:24,631 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-07 17:14:24,713 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 22 proven. 3 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2025-02-07 17:14:24,714 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-07 17:14:24,755 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2025-02-07 17:14:24,756 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1037226340] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-07 17:14:24,756 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-07 17:14:24,756 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 12 [2025-02-07 17:14:24,756 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [717979496] [2025-02-07 17:14:24,756 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-07 17:14:24,756 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2025-02-07 17:14:24,757 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-07 17:14:24,757 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2025-02-07 17:14:24,757 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2025-02-07 17:14:24,758 INFO L87 Difference]: Start difference. First operand 72 states and 91 transitions. Second operand has 12 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 12 states have internal predecessors, (29), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2025-02-07 17:14:24,888 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-07 17:14:24,888 INFO L93 Difference]: Finished difference Result 169 states and 221 transitions. [2025-02-07 17:14:24,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2025-02-07 17:14:24,888 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 12 states have internal predecessors, (29), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) Word has length 44 [2025-02-07 17:14:24,889 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-07 17:14:24,890 INFO L225 Difference]: With dead ends: 169 [2025-02-07 17:14:24,890 INFO L226 Difference]: Without dead ends: 132 [2025-02-07 17:14:24,891 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 79 SyntacticMatches, 6 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=66, Invalid=144, Unknown=0, NotChecked=0, Total=210 [2025-02-07 17:14:24,891 INFO L435 NwaCegarLoop]: 32 mSDtfsCounter, 93 mSDsluCounter, 99 mSDsCounter, 0 mSdLazyCounter, 151 mSolverCounterSat, 89 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 105 SdHoareTripleChecker+Valid, 131 SdHoareTripleChecker+Invalid, 240 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 89 IncrementalHoareTripleChecker+Valid, 151 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-02-07 17:14:24,891 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [105 Valid, 131 Invalid, 240 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [89 Valid, 151 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-02-07 17:14:24,892 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2025-02-07 17:14:24,915 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 122. [2025-02-07 17:14:24,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 122 states, 83 states have (on average 1.1325301204819278) internal successors, (94), 84 states have internal predecessors, (94), 33 states have call successors, (33), 5 states have call predecessors, (33), 5 states have return successors, (33), 32 states have call predecessors, (33), 33 states have call successors, (33) [2025-02-07 17:14:24,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 160 transitions. [2025-02-07 17:14:24,916 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 160 transitions. Word has length 44 [2025-02-07 17:14:24,916 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-07 17:14:24,916 INFO L471 AbstractCegarLoop]: Abstraction has 122 states and 160 transitions. [2025-02-07 17:14:24,917 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 12 states have internal predecessors, (29), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2025-02-07 17:14:24,917 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 160 transitions. [2025-02-07 17:14:24,917 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2025-02-07 17:14:24,917 INFO L210 NwaCegarLoop]: Found error trace [2025-02-07 17:14:24,917 INFO L218 NwaCegarLoop]: trace histogram [5, 5, 5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-07 17:14:24,923 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2025-02-07 17:14:25,122 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-07 17:14:25,122 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-07 17:14:25,122 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-07 17:14:25,122 INFO L85 PathProgramCache]: Analyzing trace with hash 230212450, now seen corresponding path program 6 times [2025-02-07 17:14:25,122 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-07 17:14:25,122 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1997786245] [2025-02-07 17:14:25,123 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-02-07 17:14:25,123 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-07 17:14:25,128 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 44 statements into 7 equivalence classes. [2025-02-07 17:14:25,138 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) and asserted 39 of 44 statements. [2025-02-07 17:14:25,138 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2025-02-07 17:14:25,138 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 17:14:25,239 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2025-02-07 17:14:25,239 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-07 17:14:25,239 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1997786245] [2025-02-07 17:14:25,239 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1997786245] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-07 17:14:25,239 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1594532669] [2025-02-07 17:14:25,239 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-02-07 17:14:25,239 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-07 17:14:25,239 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-07 17:14:25,241 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-07 17:14:25,264 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2025-02-07 17:14:25,295 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 44 statements into 7 equivalence classes. [2025-02-07 17:14:25,354 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) and asserted 39 of 44 statements. [2025-02-07 17:14:25,354 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2025-02-07 17:14:25,354 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 17:14:25,355 INFO L256 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 8 conjuncts are in the unsatisfiable core [2025-02-07 17:14:25,359 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-07 17:14:25,413 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 19 proven. 6 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2025-02-07 17:14:25,413 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-07 17:14:25,468 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2025-02-07 17:14:25,468 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1594532669] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-07 17:14:25,468 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-07 17:14:25,468 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 13 [2025-02-07 17:14:25,468 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [908298679] [2025-02-07 17:14:25,468 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-07 17:14:25,469 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2025-02-07 17:14:25,470 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-07 17:14:25,470 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2025-02-07 17:14:25,470 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=107, Unknown=0, NotChecked=0, Total=156 [2025-02-07 17:14:25,471 INFO L87 Difference]: Start difference. First operand 122 states and 160 transitions. Second operand has 13 states, 13 states have (on average 2.3846153846153846) internal successors, (31), 13 states have internal predecessors, (31), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2025-02-07 17:14:25,656 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-07 17:14:25,656 INFO L93 Difference]: Finished difference Result 133 states and 170 transitions. [2025-02-07 17:14:25,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2025-02-07 17:14:25,656 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.3846153846153846) internal successors, (31), 13 states have internal predecessors, (31), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) Word has length 44 [2025-02-07 17:14:25,657 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-07 17:14:25,657 INFO L225 Difference]: With dead ends: 133 [2025-02-07 17:14:25,657 INFO L226 Difference]: Without dead ends: 130 [2025-02-07 17:14:25,658 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 78 SyntacticMatches, 6 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=73, Invalid=167, Unknown=0, NotChecked=0, Total=240 [2025-02-07 17:14:25,658 INFO L435 NwaCegarLoop]: 55 mSDtfsCounter, 51 mSDsluCounter, 194 mSDsCounter, 0 mSdLazyCounter, 265 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 249 SdHoareTripleChecker+Invalid, 300 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 265 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2025-02-07 17:14:25,658 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [59 Valid, 249 Invalid, 300 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 265 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2025-02-07 17:14:25,659 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2025-02-07 17:14:25,677 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 123. [2025-02-07 17:14:25,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 123 states, 84 states have (on average 1.130952380952381) internal successors, (95), 85 states have internal predecessors, (95), 33 states have call successors, (33), 5 states have call predecessors, (33), 5 states have return successors, (33), 32 states have call predecessors, (33), 33 states have call successors, (33) [2025-02-07 17:14:25,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 161 transitions. [2025-02-07 17:14:25,679 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 161 transitions. Word has length 44 [2025-02-07 17:14:25,679 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-07 17:14:25,679 INFO L471 AbstractCegarLoop]: Abstraction has 123 states and 161 transitions. [2025-02-07 17:14:25,679 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.3846153846153846) internal successors, (31), 13 states have internal predecessors, (31), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2025-02-07 17:14:25,679 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 161 transitions. [2025-02-07 17:14:25,680 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2025-02-07 17:14:25,680 INFO L210 NwaCegarLoop]: Found error trace [2025-02-07 17:14:25,680 INFO L218 NwaCegarLoop]: trace histogram [5, 5, 5, 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] [2025-02-07 17:14:25,687 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2025-02-07 17:14:25,884 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2025-02-07 17:14:25,884 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-07 17:14:25,884 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-07 17:14:25,885 INFO L85 PathProgramCache]: Analyzing trace with hash -1453316889, now seen corresponding path program 7 times [2025-02-07 17:14:25,885 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-07 17:14:25,885 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1866958821] [2025-02-07 17:14:25,885 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-02-07 17:14:25,885 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-07 17:14:25,890 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 45 statements into 1 equivalence classes. [2025-02-07 17:14:25,909 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 45 of 45 statements. [2025-02-07 17:14:25,909 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-07 17:14:25,909 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unknown [2025-02-07 17:14:25,910 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [360362822] [2025-02-07 17:14:25,910 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-02-07 17:14:25,910 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-07 17:14:25,910 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-07 17:14:25,912 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-07 17:14:25,913 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2025-02-07 17:14:25,946 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 45 statements into 1 equivalence classes. [2025-02-07 17:14:25,978 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 45 of 45 statements. [2025-02-07 17:14:25,979 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-07 17:14:25,979 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 17:14:25,980 INFO L256 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 74 conjuncts are in the unsatisfiable core [2025-02-07 17:14:25,982 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-07 17:14:26,002 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2025-02-07 17:14:26,008 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2025-02-07 17:14:26,026 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2025-02-07 17:14:26,037 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2025-02-07 17:14:26,075 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-02-07 17:14:26,076 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 28 [2025-02-07 17:14:26,087 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-02-07 17:14:26,088 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 28 [2025-02-07 17:14:27,350 INFO L349 Elim1Store]: treesize reduction 120, result has 35.8 percent of original size [2025-02-07 17:14:27,350 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 3 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 21 case distinctions, treesize of input 56 treesize of output 94 [2025-02-07 17:14:27,467 INFO L349 Elim1Store]: treesize reduction 132, result has 33.7 percent of original size [2025-02-07 17:14:27,468 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 3 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 21 case distinctions, treesize of input 56 treesize of output 96 [2025-02-07 17:14:28,011 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-02-07 17:14:28,011 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 96 treesize of output 52 [2025-02-07 17:14:28,014 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-02-07 17:14:28,015 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 132 treesize of output 76 [2025-02-07 17:14:28,042 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 16 proven. 28 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2025-02-07 17:14:28,042 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-07 17:14:28,881 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-07 17:14:28,881 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1866958821] [2025-02-07 17:14:28,881 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2025-02-07 17:14:28,881 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [360362822] [2025-02-07 17:14:28,881 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [360362822] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-07 17:14:28,881 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2025-02-07 17:14:28,881 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2025-02-07 17:14:28,882 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1876247254] [2025-02-07 17:14:28,882 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2025-02-07 17:14:28,882 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2025-02-07 17:14:28,882 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-07 17:14:28,883 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2025-02-07 17:14:28,884 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=172, Invalid=1160, Unknown=0, NotChecked=0, Total=1332 [2025-02-07 17:14:28,884 INFO L87 Difference]: Start difference. First operand 123 states and 161 transitions. Second operand has 23 states, 20 states have (on average 1.45) internal successors, (29), 19 states have internal predecessors, (29), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 3 states have call predecessors, (5), 5 states have call successors, (5) [2025-02-07 17:14:29,748 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-07 17:14:29,749 INFO L93 Difference]: Finished difference Result 158 states and 205 transitions. [2025-02-07 17:14:29,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2025-02-07 17:14:29,749 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 20 states have (on average 1.45) internal successors, (29), 19 states have internal predecessors, (29), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 3 states have call predecessors, (5), 5 states have call successors, (5) Word has length 45 [2025-02-07 17:14:29,750 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-07 17:14:29,751 INFO L225 Difference]: With dead ends: 158 [2025-02-07 17:14:29,751 INFO L226 Difference]: Without dead ends: 155 [2025-02-07 17:14:29,752 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 28 SyntacticMatches, 5 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 519 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=258, Invalid=1464, Unknown=0, NotChecked=0, Total=1722 [2025-02-07 17:14:29,752 INFO L435 NwaCegarLoop]: 37 mSDtfsCounter, 41 mSDsluCounter, 242 mSDsCounter, 0 mSdLazyCounter, 652 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 279 SdHoareTripleChecker+Invalid, 684 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 652 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2025-02-07 17:14:29,753 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [54 Valid, 279 Invalid, 684 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 652 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2025-02-07 17:14:29,753 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2025-02-07 17:14:29,776 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 141. [2025-02-07 17:14:29,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 141 states, 97 states have (on average 1.134020618556701) internal successors, (110), 98 states have internal predecessors, (110), 37 states have call successors, (37), 6 states have call predecessors, (37), 6 states have return successors, (37), 36 states have call predecessors, (37), 37 states have call successors, (37) [2025-02-07 17:14:29,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 184 transitions. [2025-02-07 17:14:29,778 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 184 transitions. Word has length 45 [2025-02-07 17:14:29,779 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-07 17:14:29,779 INFO L471 AbstractCegarLoop]: Abstraction has 141 states and 184 transitions. [2025-02-07 17:14:29,779 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 20 states have (on average 1.45) internal successors, (29), 19 states have internal predecessors, (29), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 3 states have call predecessors, (5), 5 states have call successors, (5) [2025-02-07 17:14:29,779 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 184 transitions. [2025-02-07 17:14:29,780 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2025-02-07 17:14:29,780 INFO L210 NwaCegarLoop]: Found error trace [2025-02-07 17:14:29,780 INFO L218 NwaCegarLoop]: trace histogram [5, 5, 5, 4, 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] [2025-02-07 17:14:29,786 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 [2025-02-07 17:14:29,980 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,8 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-07 17:14:29,981 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-07 17:14:29,982 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-07 17:14:29,982 INFO L85 PathProgramCache]: Analyzing trace with hash -2103118846, now seen corresponding path program 8 times [2025-02-07 17:14:29,982 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-07 17:14:29,982 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1374108674] [2025-02-07 17:14:29,982 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-07 17:14:29,982 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-07 17:14:29,987 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 46 statements into 2 equivalence classes. [2025-02-07 17:14:29,992 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 46 of 46 statements. [2025-02-07 17:14:29,992 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-02-07 17:14:29,992 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 17:14:30,098 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2025-02-07 17:14:30,098 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-07 17:14:30,099 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1374108674] [2025-02-07 17:14:30,099 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1374108674] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-07 17:14:30,099 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1423675423] [2025-02-07 17:14:30,099 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-07 17:14:30,099 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-07 17:14:30,099 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-07 17:14:30,101 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-07 17:14:30,103 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2025-02-07 17:14:30,154 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 46 statements into 2 equivalence classes. [2025-02-07 17:14:30,170 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 46 of 46 statements. [2025-02-07 17:14:30,170 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-02-07 17:14:30,170 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 17:14:30,171 INFO L256 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 10 conjuncts are in the unsatisfiable core [2025-02-07 17:14:30,172 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-07 17:14:30,246 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 26 proven. 6 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2025-02-07 17:14:30,246 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-07 17:14:30,305 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2025-02-07 17:14:30,305 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1423675423] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-07 17:14:30,305 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-07 17:14:30,305 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 17 [2025-02-07 17:14:30,305 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [329011848] [2025-02-07 17:14:30,305 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-07 17:14:30,306 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2025-02-07 17:14:30,306 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-07 17:14:30,306 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2025-02-07 17:14:30,306 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=197, Unknown=0, NotChecked=0, Total=272 [2025-02-07 17:14:30,306 INFO L87 Difference]: Start difference. First operand 141 states and 184 transitions. Second operand has 17 states, 17 states have (on average 2.1176470588235294) internal successors, (36), 17 states have internal predecessors, (36), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2025-02-07 17:14:30,604 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-07 17:14:30,604 INFO L93 Difference]: Finished difference Result 331 states and 442 transitions. [2025-02-07 17:14:30,605 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2025-02-07 17:14:30,605 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.1176470588235294) internal successors, (36), 17 states have internal predecessors, (36), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) Word has length 46 [2025-02-07 17:14:30,606 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-07 17:14:30,608 INFO L225 Difference]: With dead ends: 331 [2025-02-07 17:14:30,608 INFO L226 Difference]: Without dead ends: 240 [2025-02-07 17:14:30,609 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 79 SyntacticMatches, 7 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 167 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=133, Invalid=329, Unknown=0, NotChecked=0, Total=462 [2025-02-07 17:14:30,609 INFO L435 NwaCegarLoop]: 42 mSDtfsCounter, 194 mSDsluCounter, 179 mSDsCounter, 0 mSdLazyCounter, 287 mSolverCounterSat, 159 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 210 SdHoareTripleChecker+Valid, 221 SdHoareTripleChecker+Invalid, 446 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 159 IncrementalHoareTripleChecker+Valid, 287 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2025-02-07 17:14:30,609 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [210 Valid, 221 Invalid, 446 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [159 Valid, 287 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2025-02-07 17:14:30,609 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 240 states. [2025-02-07 17:14:30,659 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 240 to 211. [2025-02-07 17:14:30,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 211 states, 142 states have (on average 1.1338028169014085) internal successors, (161), 143 states have internal predecessors, (161), 61 states have call successors, (61), 7 states have call predecessors, (61), 7 states have return successors, (61), 60 states have call predecessors, (61), 61 states have call successors, (61) [2025-02-07 17:14:30,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 211 states to 211 states and 283 transitions. [2025-02-07 17:14:30,664 INFO L78 Accepts]: Start accepts. Automaton has 211 states and 283 transitions. Word has length 46 [2025-02-07 17:14:30,664 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-07 17:14:30,664 INFO L471 AbstractCegarLoop]: Abstraction has 211 states and 283 transitions. [2025-02-07 17:14:30,664 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.1176470588235294) internal successors, (36), 17 states have internal predecessors, (36), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2025-02-07 17:14:30,664 INFO L276 IsEmpty]: Start isEmpty. Operand 211 states and 283 transitions. [2025-02-07 17:14:30,665 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2025-02-07 17:14:30,665 INFO L210 NwaCegarLoop]: Found error trace [2025-02-07 17:14:30,666 INFO L218 NwaCegarLoop]: trace histogram [5, 5, 5, 4, 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] [2025-02-07 17:14:30,671 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2025-02-07 17:14:30,866 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,9 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-07 17:14:30,866 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-07 17:14:30,867 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-07 17:14:30,867 INFO L85 PathProgramCache]: Analyzing trace with hash -1713347603, now seen corresponding path program 9 times [2025-02-07 17:14:30,867 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-07 17:14:30,867 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [909671044] [2025-02-07 17:14:30,867 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-02-07 17:14:30,867 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-07 17:14:30,873 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 46 statements into 7 equivalence classes. [2025-02-07 17:14:30,898 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) and asserted 46 of 46 statements. [2025-02-07 17:14:30,898 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2025-02-07 17:14:30,898 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 17:14:31,015 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 3 proven. 13 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2025-02-07 17:14:31,015 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-07 17:14:31,015 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [909671044] [2025-02-07 17:14:31,015 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [909671044] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-07 17:14:31,015 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [316741479] [2025-02-07 17:14:31,015 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-02-07 17:14:31,015 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-07 17:14:31,015 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-07 17:14:31,021 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-07 17:14:31,024 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2025-02-07 17:14:31,060 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 46 statements into 7 equivalence classes. [2025-02-07 17:14:31,091 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) and asserted 46 of 46 statements. [2025-02-07 17:14:31,091 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2025-02-07 17:14:31,091 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 17:14:31,092 INFO L256 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 10 conjuncts are in the unsatisfiable core [2025-02-07 17:14:31,093 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-07 17:14:31,177 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 22 proven. 10 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2025-02-07 17:14:31,177 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-07 17:14:31,237 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2025-02-07 17:14:31,237 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [316741479] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-07 17:14:31,237 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-07 17:14:31,237 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 17 [2025-02-07 17:14:31,237 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2144909266] [2025-02-07 17:14:31,237 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-07 17:14:31,237 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2025-02-07 17:14:31,237 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-07 17:14:31,238 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2025-02-07 17:14:31,238 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=197, Unknown=0, NotChecked=0, Total=272 [2025-02-07 17:14:31,238 INFO L87 Difference]: Start difference. First operand 211 states and 283 transitions. Second operand has 17 states, 17 states have (on average 2.1176470588235294) internal successors, (36), 17 states have internal predecessors, (36), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2025-02-07 17:14:31,470 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-07 17:14:31,470 INFO L93 Difference]: Finished difference Result 229 states and 300 transitions. [2025-02-07 17:14:31,472 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2025-02-07 17:14:31,472 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.1176470588235294) internal successors, (36), 17 states have internal predecessors, (36), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) Word has length 46 [2025-02-07 17:14:31,472 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-07 17:14:31,474 INFO L225 Difference]: With dead ends: 229 [2025-02-07 17:14:31,474 INFO L226 Difference]: Without dead ends: 226 [2025-02-07 17:14:31,474 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 78 SyntacticMatches, 8 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 161 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=113, Invalid=307, Unknown=0, NotChecked=0, Total=420 [2025-02-07 17:14:31,475 INFO L435 NwaCegarLoop]: 79 mSDtfsCounter, 71 mSDsluCounter, 275 mSDsCounter, 0 mSdLazyCounter, 461 mSolverCounterSat, 55 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 83 SdHoareTripleChecker+Valid, 354 SdHoareTripleChecker+Invalid, 516 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 461 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2025-02-07 17:14:31,475 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [83 Valid, 354 Invalid, 516 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [55 Valid, 461 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2025-02-07 17:14:31,475 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 226 states. [2025-02-07 17:14:31,502 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 226 to 212. [2025-02-07 17:14:31,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 212 states, 143 states have (on average 1.132867132867133) internal successors, (162), 144 states have internal predecessors, (162), 61 states have call successors, (61), 7 states have call predecessors, (61), 7 states have return successors, (61), 60 states have call predecessors, (61), 61 states have call successors, (61) [2025-02-07 17:14:31,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 212 states to 212 states and 284 transitions. [2025-02-07 17:14:31,505 INFO L78 Accepts]: Start accepts. Automaton has 212 states and 284 transitions. Word has length 46 [2025-02-07 17:14:31,506 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-07 17:14:31,506 INFO L471 AbstractCegarLoop]: Abstraction has 212 states and 284 transitions. [2025-02-07 17:14:31,506 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.1176470588235294) internal successors, (36), 17 states have internal predecessors, (36), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2025-02-07 17:14:31,506 INFO L276 IsEmpty]: Start isEmpty. Operand 212 states and 284 transitions. [2025-02-07 17:14:31,506 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2025-02-07 17:14:31,506 INFO L210 NwaCegarLoop]: Found error trace [2025-02-07 17:14:31,506 INFO L218 NwaCegarLoop]: trace histogram [5, 5, 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] [2025-02-07 17:14:31,513 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2025-02-07 17:14:31,711 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,10 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-07 17:14:31,711 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-07 17:14:31,711 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-07 17:14:31,711 INFO L85 PathProgramCache]: Analyzing trace with hash -1574136388, now seen corresponding path program 10 times [2025-02-07 17:14:31,711 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-07 17:14:31,711 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [330842269] [2025-02-07 17:14:31,711 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-02-07 17:14:31,711 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-07 17:14:31,720 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 47 statements into 2 equivalence classes. [2025-02-07 17:14:31,750 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 47 of 47 statements. [2025-02-07 17:14:31,751 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-02-07 17:14:31,751 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unknown [2025-02-07 17:14:31,752 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1946832033] [2025-02-07 17:14:31,752 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-02-07 17:14:31,752 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-07 17:14:31,752 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-07 17:14:31,754 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-07 17:14:31,758 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2025-02-07 17:14:31,798 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 47 statements into 2 equivalence classes. [2025-02-07 17:14:31,877 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 47 of 47 statements. [2025-02-07 17:14:31,877 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-02-07 17:14:31,877 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 17:14:31,878 INFO L256 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 72 conjuncts are in the unsatisfiable core [2025-02-07 17:14:31,880 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-07 17:14:31,902 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2025-02-07 17:14:31,910 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2025-02-07 17:14:31,930 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2025-02-07 17:14:31,937 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2025-02-07 17:14:31,990 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-02-07 17:14:31,990 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 28 [2025-02-07 17:14:32,004 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-02-07 17:14:32,004 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 28 [2025-02-07 17:14:32,048 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-02-07 17:14:32,048 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 38 [2025-02-07 17:14:32,065 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-02-07 17:14:32,065 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 38 [2025-02-07 17:14:33,581 INFO L349 Elim1Store]: treesize reduction 328, result has 28.9 percent of original size [2025-02-07 17:14:33,582 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 12 select indices, 12 select index equivalence classes, 6 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 78 case distinctions, treesize of input 98 treesize of output 180 [2025-02-07 17:14:33,772 INFO L349 Elim1Store]: treesize reduction 304, result has 30.4 percent of original size [2025-02-07 17:14:33,773 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 12 select indices, 12 select index equivalence classes, 6 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 78 case distinctions, treesize of input 98 treesize of output 178 [2025-02-07 17:14:34,988 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-02-07 17:14:34,989 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 152 treesize of output 84 [2025-02-07 17:14:34,994 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-02-07 17:14:34,994 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 221 treesize of output 121 [2025-02-07 17:14:35,045 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 22 proven. 32 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-02-07 17:14:35,045 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-07 17:14:37,310 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-07 17:14:37,311 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [330842269] [2025-02-07 17:14:37,311 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2025-02-07 17:14:37,311 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1946832033] [2025-02-07 17:14:37,311 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1946832033] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-07 17:14:37,311 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2025-02-07 17:14:37,311 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2025-02-07 17:14:37,311 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [451410336] [2025-02-07 17:14:37,311 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2025-02-07 17:14:37,312 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2025-02-07 17:14:37,312 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-07 17:14:37,312 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2025-02-07 17:14:37,312 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=748, Unknown=0, NotChecked=0, Total=870 [2025-02-07 17:14:37,312 INFO L87 Difference]: Start difference. First operand 212 states and 284 transitions. Second operand has 23 states, 22 states have (on average 1.5454545454545454) internal successors, (34), 21 states have internal predecessors, (34), 4 states have call successors, (5), 3 states have call predecessors, (5), 4 states have return successors, (5), 3 states have call predecessors, (5), 4 states have call successors, (5) [2025-02-07 17:14:38,170 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-07 17:14:38,171 INFO L93 Difference]: Finished difference Result 250 states and 330 transitions. [2025-02-07 17:14:38,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2025-02-07 17:14:38,171 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 22 states have (on average 1.5454545454545454) internal successors, (34), 21 states have internal predecessors, (34), 4 states have call successors, (5), 3 states have call predecessors, (5), 4 states have return successors, (5), 3 states have call predecessors, (5), 4 states have call successors, (5) Word has length 47 [2025-02-07 17:14:38,171 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-07 17:14:38,173 INFO L225 Difference]: With dead ends: 250 [2025-02-07 17:14:38,173 INFO L226 Difference]: Without dead ends: 247 [2025-02-07 17:14:38,173 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 40 SyntacticMatches, 3 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 233 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=122, Invalid=748, Unknown=0, NotChecked=0, Total=870 [2025-02-07 17:14:38,173 INFO L435 NwaCegarLoop]: 37 mSDtfsCounter, 27 mSDsluCounter, 238 mSDsCounter, 0 mSdLazyCounter, 640 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 275 SdHoareTripleChecker+Invalid, 647 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 640 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2025-02-07 17:14:38,173 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [39 Valid, 275 Invalid, 647 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 640 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2025-02-07 17:14:38,174 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 247 states. [2025-02-07 17:14:38,204 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 247 to 234. [2025-02-07 17:14:38,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 234 states, 159 states have (on average 1.1320754716981132) internal successors, (180), 160 states have internal predecessors, (180), 65 states have call successors, (65), 9 states have call predecessors, (65), 9 states have return successors, (65), 64 states have call predecessors, (65), 65 states have call successors, (65) [2025-02-07 17:14:38,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 234 states to 234 states and 310 transitions. [2025-02-07 17:14:38,206 INFO L78 Accepts]: Start accepts. Automaton has 234 states and 310 transitions. Word has length 47 [2025-02-07 17:14:38,207 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-07 17:14:38,207 INFO L471 AbstractCegarLoop]: Abstraction has 234 states and 310 transitions. [2025-02-07 17:14:38,207 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 22 states have (on average 1.5454545454545454) internal successors, (34), 21 states have internal predecessors, (34), 4 states have call successors, (5), 3 states have call predecessors, (5), 4 states have return successors, (5), 3 states have call predecessors, (5), 4 states have call successors, (5) [2025-02-07 17:14:38,207 INFO L276 IsEmpty]: Start isEmpty. Operand 234 states and 310 transitions. [2025-02-07 17:14:38,207 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2025-02-07 17:14:38,208 INFO L210 NwaCegarLoop]: Found error trace [2025-02-07 17:14:38,208 INFO L218 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-07 17:14:38,218 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2025-02-07 17:14:38,412 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,SelfDestructingSolverStorable13 [2025-02-07 17:14:38,412 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-07 17:14:38,413 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-07 17:14:38,413 INFO L85 PathProgramCache]: Analyzing trace with hash -1553556019, now seen corresponding path program 11 times [2025-02-07 17:14:38,413 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-07 17:14:38,413 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1868456930] [2025-02-07 17:14:38,413 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-02-07 17:14:38,413 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-07 17:14:38,419 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 48 statements into 7 equivalence classes. [2025-02-07 17:14:38,467 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) and asserted 48 of 48 statements. [2025-02-07 17:14:38,467 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2025-02-07 17:14:38,467 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 17:14:38,585 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2025-02-07 17:14:38,585 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-07 17:14:38,585 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1868456930] [2025-02-07 17:14:38,585 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1868456930] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-07 17:14:38,585 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1667598261] [2025-02-07 17:14:38,585 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-02-07 17:14:38,586 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-07 17:14:38,586 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-07 17:14:38,591 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-07 17:14:38,601 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2025-02-07 17:14:38,646 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 48 statements into 7 equivalence classes. [2025-02-07 17:14:38,713 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) and asserted 48 of 48 statements. [2025-02-07 17:14:38,714 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2025-02-07 17:14:38,714 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 17:14:38,715 INFO L256 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 12 conjuncts are in the unsatisfiable core [2025-02-07 17:14:38,716 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-07 17:14:38,805 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 31 proven. 10 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2025-02-07 17:14:38,805 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-07 17:14:38,876 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2025-02-07 17:14:38,876 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1667598261] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-07 17:14:38,876 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-07 17:14:38,876 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 18 [2025-02-07 17:14:38,877 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [316161894] [2025-02-07 17:14:38,877 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-07 17:14:38,877 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2025-02-07 17:14:38,877 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-07 17:14:38,877 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2025-02-07 17:14:38,877 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=223, Unknown=0, NotChecked=0, Total=306 [2025-02-07 17:14:38,878 INFO L87 Difference]: Start difference. First operand 234 states and 310 transitions. Second operand has 18 states, 18 states have (on average 1.9444444444444444) internal successors, (35), 18 states have internal predecessors, (35), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2025-02-07 17:14:39,309 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-07 17:14:39,309 INFO L93 Difference]: Finished difference Result 573 states and 772 transitions. [2025-02-07 17:14:39,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2025-02-07 17:14:39,309 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.9444444444444444) internal successors, (35), 18 states have internal predecessors, (35), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) Word has length 48 [2025-02-07 17:14:39,309 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-07 17:14:39,312 INFO L225 Difference]: With dead ends: 573 [2025-02-07 17:14:39,313 INFO L226 Difference]: Without dead ends: 408 [2025-02-07 17:14:39,315 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 81 SyntacticMatches, 10 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 208 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=228, Invalid=584, Unknown=0, NotChecked=0, Total=812 [2025-02-07 17:14:39,315 INFO L435 NwaCegarLoop]: 74 mSDtfsCounter, 204 mSDsluCounter, 275 mSDsCounter, 0 mSdLazyCounter, 590 mSolverCounterSat, 181 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 224 SdHoareTripleChecker+Valid, 349 SdHoareTripleChecker+Invalid, 771 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 181 IncrementalHoareTripleChecker+Valid, 590 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2025-02-07 17:14:39,316 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [224 Valid, 349 Invalid, 771 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [181 Valid, 590 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2025-02-07 17:14:39,316 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 408 states. [2025-02-07 17:14:39,367 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 408 to 326. [2025-02-07 17:14:39,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 326 states, 218 states have (on average 1.1330275229357798) internal successors, (247), 219 states have internal predecessors, (247), 97 states have call successors, (97), 10 states have call predecessors, (97), 10 states have return successors, (97), 96 states have call predecessors, (97), 97 states have call successors, (97) [2025-02-07 17:14:39,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 326 states to 326 states and 441 transitions. [2025-02-07 17:14:39,370 INFO L78 Accepts]: Start accepts. Automaton has 326 states and 441 transitions. Word has length 48 [2025-02-07 17:14:39,370 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-07 17:14:39,370 INFO L471 AbstractCegarLoop]: Abstraction has 326 states and 441 transitions. [2025-02-07 17:14:39,370 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.9444444444444444) internal successors, (35), 18 states have internal predecessors, (35), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2025-02-07 17:14:39,370 INFO L276 IsEmpty]: Start isEmpty. Operand 326 states and 441 transitions. [2025-02-07 17:14:39,371 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2025-02-07 17:14:39,371 INFO L210 NwaCegarLoop]: Found error trace [2025-02-07 17:14:39,371 INFO L218 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-07 17:14:39,377 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2025-02-07 17:14:39,571 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2025-02-07 17:14:39,572 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-07 17:14:39,572 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-07 17:14:39,572 INFO L85 PathProgramCache]: Analyzing trace with hash 1939417922, now seen corresponding path program 12 times [2025-02-07 17:14:39,572 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-07 17:14:39,572 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1376303194] [2025-02-07 17:14:39,572 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-02-07 17:14:39,572 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-07 17:14:39,578 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 48 statements into 8 equivalence classes. [2025-02-07 17:14:39,596 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) and asserted 48 of 48 statements. [2025-02-07 17:14:39,596 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2025-02-07 17:14:39,596 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 17:14:39,722 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 10 proven. 15 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2025-02-07 17:14:39,722 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-07 17:14:39,722 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1376303194] [2025-02-07 17:14:39,722 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1376303194] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-07 17:14:39,722 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1531041390] [2025-02-07 17:14:39,723 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-02-07 17:14:39,723 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-07 17:14:39,723 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-07 17:14:39,724 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-07 17:14:39,726 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2025-02-07 17:14:39,772 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 48 statements into 8 equivalence classes. [2025-02-07 17:14:39,948 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) and asserted 48 of 48 statements. [2025-02-07 17:14:39,948 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2025-02-07 17:14:39,948 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 17:14:39,950 INFO L256 TraceCheckSpWp]: Trace formula consists of 207 conjuncts, 12 conjuncts are in the unsatisfiable core [2025-02-07 17:14:39,952 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-07 17:14:40,035 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 26 proven. 15 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2025-02-07 17:14:40,035 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-07 17:14:40,116 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 10 proven. 15 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2025-02-07 17:14:40,116 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1531041390] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-07 17:14:40,116 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-07 17:14:40,116 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 19 [2025-02-07 17:14:40,117 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [858526800] [2025-02-07 17:14:40,117 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-07 17:14:40,117 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2025-02-07 17:14:40,117 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-07 17:14:40,117 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2025-02-07 17:14:40,117 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=245, Unknown=0, NotChecked=0, Total=342 [2025-02-07 17:14:40,117 INFO L87 Difference]: Start difference. First operand 326 states and 441 transitions. Second operand has 19 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 19 states have internal predecessors, (37), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2025-02-07 17:14:40,478 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-07 17:14:40,478 INFO L93 Difference]: Finished difference Result 354 states and 468 transitions. [2025-02-07 17:14:40,479 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2025-02-07 17:14:40,479 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 19 states have internal predecessors, (37), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) Word has length 48 [2025-02-07 17:14:40,479 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-07 17:14:40,481 INFO L225 Difference]: With dead ends: 354 [2025-02-07 17:14:40,481 INFO L226 Difference]: Without dead ends: 351 [2025-02-07 17:14:40,481 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 80 SyntacticMatches, 10 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 216 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=152, Invalid=400, Unknown=0, NotChecked=0, Total=552 [2025-02-07 17:14:40,482 INFO L435 NwaCegarLoop]: 103 mSDtfsCounter, 121 mSDsluCounter, 294 mSDsCounter, 0 mSdLazyCounter, 477 mSolverCounterSat, 87 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 137 SdHoareTripleChecker+Valid, 397 SdHoareTripleChecker+Invalid, 564 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 87 IncrementalHoareTripleChecker+Valid, 477 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2025-02-07 17:14:40,482 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [137 Valid, 397 Invalid, 564 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [87 Valid, 477 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2025-02-07 17:14:40,483 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 351 states. [2025-02-07 17:14:40,531 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 351 to 327. [2025-02-07 17:14:40,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 327 states, 219 states have (on average 1.1324200913242009) internal successors, (248), 220 states have internal predecessors, (248), 97 states have call successors, (97), 10 states have call predecessors, (97), 10 states have return successors, (97), 96 states have call predecessors, (97), 97 states have call successors, (97) [2025-02-07 17:14:40,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 327 states to 327 states and 442 transitions. [2025-02-07 17:14:40,534 INFO L78 Accepts]: Start accepts. Automaton has 327 states and 442 transitions. Word has length 48 [2025-02-07 17:14:40,534 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-07 17:14:40,534 INFO L471 AbstractCegarLoop]: Abstraction has 327 states and 442 transitions. [2025-02-07 17:14:40,534 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 19 states have internal predecessors, (37), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2025-02-07 17:14:40,534 INFO L276 IsEmpty]: Start isEmpty. Operand 327 states and 442 transitions. [2025-02-07 17:14:40,536 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2025-02-07 17:14:40,536 INFO L210 NwaCegarLoop]: Found error trace [2025-02-07 17:14:40,536 INFO L218 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-07 17:14:40,543 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2025-02-07 17:14:40,737 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,13 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-07 17:14:40,737 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-07 17:14:40,737 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-07 17:14:40,737 INFO L85 PathProgramCache]: Analyzing trace with hash -7554809, now seen corresponding path program 13 times [2025-02-07 17:14:40,737 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-07 17:14:40,737 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [517613050] [2025-02-07 17:14:40,737 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-02-07 17:14:40,738 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-07 17:14:40,746 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 49 statements into 1 equivalence classes. [2025-02-07 17:14:40,769 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 49 of 49 statements. [2025-02-07 17:14:40,769 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-07 17:14:40,769 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unknown [2025-02-07 17:14:40,772 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2003600287] [2025-02-07 17:14:40,772 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-02-07 17:14:40,772 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-07 17:14:40,772 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-07 17:14:40,776 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-07 17:14:40,779 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2025-02-07 17:14:40,827 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 49 statements into 1 equivalence classes. [2025-02-07 17:14:40,914 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 49 of 49 statements. [2025-02-07 17:14:40,914 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-07 17:14:40,914 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 17:14:40,915 INFO L256 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 87 conjuncts are in the unsatisfiable core [2025-02-07 17:14:40,919 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-07 17:14:40,934 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2025-02-07 17:14:40,941 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2025-02-07 17:14:40,960 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2025-02-07 17:14:40,966 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2025-02-07 17:14:40,997 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-02-07 17:14:40,997 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 28 [2025-02-07 17:14:41,009 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-02-07 17:14:41,009 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 28 [2025-02-07 17:14:41,050 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-02-07 17:14:41,050 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 38 [2025-02-07 17:14:41,066 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-02-07 17:14:41,066 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 38 [2025-02-07 17:14:41,112 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-02-07 17:14:41,112 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 10 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 40 treesize of output 48 [2025-02-07 17:14:41,128 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-02-07 17:14:41,128 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 10 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 40 treesize of output 48 [2025-02-07 17:14:42,853 INFO L349 Elim1Store]: treesize reduction 220, result has 33.5 percent of original size [2025-02-07 17:14:42,854 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 10 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 55 case distinctions, treesize of input 84 treesize of output 152 [2025-02-07 17:14:42,987 INFO L349 Elim1Store]: treesize reduction 200, result has 35.7 percent of original size [2025-02-07 17:14:42,987 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 10 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 55 case distinctions, treesize of input 84 treesize of output 150 [2025-02-07 17:14:44,782 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-02-07 17:14:44,783 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 209 treesize of output 113 [2025-02-07 17:14:44,789 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-02-07 17:14:44,789 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 331 treesize of output 175 [2025-02-07 17:14:44,856 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 19 proven. 46 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2025-02-07 17:14:44,857 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-07 17:14:45,713 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-07 17:14:45,713 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [517613050] [2025-02-07 17:14:45,713 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2025-02-07 17:14:45,713 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2003600287] [2025-02-07 17:14:45,713 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2003600287] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-07 17:14:45,713 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2025-02-07 17:14:45,714 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2025-02-07 17:14:45,714 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [604840296] [2025-02-07 17:14:45,714 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2025-02-07 17:14:45,714 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2025-02-07 17:14:45,714 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-07 17:14:45,714 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2025-02-07 17:14:45,715 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=154, Invalid=1252, Unknown=0, NotChecked=0, Total=1406 [2025-02-07 17:14:45,715 INFO L87 Difference]: Start difference. First operand 327 states and 442 transitions. Second operand has 26 states, 24 states have (on average 1.5) internal successors, (36), 24 states have internal predecessors, (36), 5 states have call successors, (5), 3 states have call predecessors, (5), 4 states have return successors, (5), 3 states have call predecessors, (5), 5 states have call successors, (5) [2025-02-07 17:14:46,889 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-07 17:14:46,890 INFO L93 Difference]: Finished difference Result 366 states and 490 transitions. [2025-02-07 17:14:46,890 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2025-02-07 17:14:46,890 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 24 states have (on average 1.5) internal successors, (36), 24 states have internal predecessors, (36), 5 states have call successors, (5), 3 states have call predecessors, (5), 4 states have return successors, (5), 3 states have call predecessors, (5), 5 states have call successors, (5) Word has length 49 [2025-02-07 17:14:46,890 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-07 17:14:46,892 INFO L225 Difference]: With dead ends: 366 [2025-02-07 17:14:46,893 INFO L226 Difference]: Without dead ends: 363 [2025-02-07 17:14:46,894 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 33 SyntacticMatches, 5 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 455 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=215, Invalid=1507, Unknown=0, NotChecked=0, Total=1722 [2025-02-07 17:14:46,894 INFO L435 NwaCegarLoop]: 43 mSDtfsCounter, 40 mSDsluCounter, 244 mSDsCounter, 0 mSdLazyCounter, 824 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 287 SdHoareTripleChecker+Invalid, 854 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 824 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2025-02-07 17:14:46,894 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [53 Valid, 287 Invalid, 854 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 824 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2025-02-07 17:14:46,895 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 363 states. [2025-02-07 17:14:46,987 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 363 to 345. [2025-02-07 17:14:46,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 345 states, 232 states have (on average 1.1336206896551724) internal successors, (263), 233 states have internal predecessors, (263), 101 states have call successors, (101), 11 states have call predecessors, (101), 11 states have return successors, (101), 100 states have call predecessors, (101), 101 states have call successors, (101) [2025-02-07 17:14:46,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 345 states to 345 states and 465 transitions. [2025-02-07 17:14:46,990 INFO L78 Accepts]: Start accepts. Automaton has 345 states and 465 transitions. Word has length 49 [2025-02-07 17:14:46,990 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-07 17:14:46,990 INFO L471 AbstractCegarLoop]: Abstraction has 345 states and 465 transitions. [2025-02-07 17:14:46,990 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 24 states have (on average 1.5) internal successors, (36), 24 states have internal predecessors, (36), 5 states have call successors, (5), 3 states have call predecessors, (5), 4 states have return successors, (5), 3 states have call predecessors, (5), 5 states have call successors, (5) [2025-02-07 17:14:46,990 INFO L276 IsEmpty]: Start isEmpty. Operand 345 states and 465 transitions. [2025-02-07 17:14:46,991 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2025-02-07 17:14:46,991 INFO L210 NwaCegarLoop]: Found error trace [2025-02-07 17:14:46,991 INFO L218 NwaCegarLoop]: trace histogram [6, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-07 17:14:46,998 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2025-02-07 17:14:47,191 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2025-02-07 17:14:47,192 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-07 17:14:47,192 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-07 17:14:47,193 INFO L85 PathProgramCache]: Analyzing trace with hash -234167326, now seen corresponding path program 14 times [2025-02-07 17:14:47,193 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-07 17:14:47,193 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [420659936] [2025-02-07 17:14:47,193 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-07 17:14:47,193 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-07 17:14:47,199 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 50 statements into 2 equivalence classes. [2025-02-07 17:14:47,204 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 50 of 50 statements. [2025-02-07 17:14:47,204 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-02-07 17:14:47,204 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 17:14:47,416 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 16 proven. 20 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2025-02-07 17:14:47,416 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-07 17:14:47,416 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [420659936] [2025-02-07 17:14:47,416 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [420659936] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-07 17:14:47,416 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [244039349] [2025-02-07 17:14:47,416 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-07 17:14:47,416 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-07 17:14:47,417 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-07 17:14:47,420 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-07 17:14:47,425 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2025-02-07 17:14:47,477 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 50 statements into 2 equivalence classes. [2025-02-07 17:14:47,495 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 50 of 50 statements. [2025-02-07 17:14:47,495 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-02-07 17:14:47,496 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 17:14:47,496 INFO L256 TraceCheckSpWp]: Trace formula consists of 217 conjuncts, 14 conjuncts are in the unsatisfiable core [2025-02-07 17:14:47,497 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-07 17:14:47,640 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 37 proven. 15 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2025-02-07 17:14:47,641 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-07 17:14:47,757 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2025-02-07 17:14:47,757 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [244039349] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-07 17:14:47,758 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-07 17:14:47,758 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 23 [2025-02-07 17:14:47,758 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1024985049] [2025-02-07 17:14:47,758 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-07 17:14:47,758 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2025-02-07 17:14:47,758 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-07 17:14:47,758 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2025-02-07 17:14:47,759 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=375, Unknown=0, NotChecked=0, Total=506 [2025-02-07 17:14:47,759 INFO L87 Difference]: Start difference. First operand 345 states and 465 transitions. Second operand has 23 states, 23 states have (on average 1.826086956521739) internal successors, (42), 23 states have internal predecessors, (42), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2025-02-07 17:14:48,555 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-07 17:14:48,556 INFO L93 Difference]: Finished difference Result 887 states and 1205 transitions. [2025-02-07 17:14:48,556 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2025-02-07 17:14:48,556 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.826086956521739) internal successors, (42), 23 states have internal predecessors, (42), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) Word has length 50 [2025-02-07 17:14:48,556 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-07 17:14:48,558 INFO L225 Difference]: With dead ends: 887 [2025-02-07 17:14:48,559 INFO L226 Difference]: Without dead ends: 626 [2025-02-07 17:14:48,560 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 81 SyntacticMatches, 11 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 487 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=381, Invalid=1101, Unknown=0, NotChecked=0, Total=1482 [2025-02-07 17:14:48,560 INFO L435 NwaCegarLoop]: 84 mSDtfsCounter, 455 mSDsluCounter, 310 mSDsCounter, 0 mSdLazyCounter, 631 mSolverCounterSat, 384 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 479 SdHoareTripleChecker+Valid, 394 SdHoareTripleChecker+Invalid, 1015 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 384 IncrementalHoareTripleChecker+Valid, 631 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2025-02-07 17:14:48,560 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [479 Valid, 394 Invalid, 1015 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [384 Valid, 631 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2025-02-07 17:14:48,560 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 626 states. [2025-02-07 17:14:48,628 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 626 to 459. [2025-02-07 17:14:48,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 459 states, 305 states have (on average 1.1344262295081968) internal successors, (346), 306 states have internal predecessors, (346), 141 states have call successors, (141), 12 states have call predecessors, (141), 12 states have return successors, (141), 140 states have call predecessors, (141), 141 states have call successors, (141) [2025-02-07 17:14:48,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 459 states to 459 states and 628 transitions. [2025-02-07 17:14:48,632 INFO L78 Accepts]: Start accepts. Automaton has 459 states and 628 transitions. Word has length 50 [2025-02-07 17:14:48,632 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-07 17:14:48,632 INFO L471 AbstractCegarLoop]: Abstraction has 459 states and 628 transitions. [2025-02-07 17:14:48,632 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.826086956521739) internal successors, (42), 23 states have internal predecessors, (42), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2025-02-07 17:14:48,632 INFO L276 IsEmpty]: Start isEmpty. Operand 459 states and 628 transitions. [2025-02-07 17:14:48,632 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2025-02-07 17:14:48,633 INFO L210 NwaCegarLoop]: Found error trace [2025-02-07 17:14:48,633 INFO L218 NwaCegarLoop]: trace histogram [6, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-07 17:14:48,639 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2025-02-07 17:14:48,837 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2025-02-07 17:14:48,837 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-07 17:14:48,837 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-07 17:14:48,837 INFO L85 PathProgramCache]: Analyzing trace with hash 673842445, now seen corresponding path program 15 times [2025-02-07 17:14:48,837 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-07 17:14:48,837 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1235672418] [2025-02-07 17:14:48,837 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-02-07 17:14:48,837 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-07 17:14:48,843 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 50 statements into 8 equivalence classes. [2025-02-07 17:14:48,877 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) and asserted 50 of 50 statements. [2025-02-07 17:14:48,877 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2025-02-07 17:14:48,877 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 17:14:49,037 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 10 proven. 26 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2025-02-07 17:14:49,037 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-07 17:14:49,037 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1235672418] [2025-02-07 17:14:49,037 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1235672418] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-07 17:14:49,037 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1461645097] [2025-02-07 17:14:49,037 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-02-07 17:14:49,037 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-07 17:14:49,038 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-07 17:14:49,039 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-07 17:14:49,043 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2025-02-07 17:14:49,095 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 50 statements into 8 equivalence classes. [2025-02-07 17:14:49,146 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) and asserted 50 of 50 statements. [2025-02-07 17:14:49,146 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2025-02-07 17:14:49,146 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 17:14:49,147 INFO L256 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 14 conjuncts are in the unsatisfiable core [2025-02-07 17:14:49,148 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-07 17:14:49,247 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 31 proven. 21 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2025-02-07 17:14:49,247 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-07 17:14:49,344 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 15 proven. 21 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2025-02-07 17:14:49,344 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1461645097] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-07 17:14:49,344 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-07 17:14:49,344 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 23 [2025-02-07 17:14:49,344 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1906840164] [2025-02-07 17:14:49,344 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-07 17:14:49,344 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2025-02-07 17:14:49,344 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-07 17:14:49,344 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2025-02-07 17:14:49,345 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=375, Unknown=0, NotChecked=0, Total=506 [2025-02-07 17:14:49,345 INFO L87 Difference]: Start difference. First operand 459 states and 628 transitions. Second operand has 23 states, 23 states have (on average 1.826086956521739) internal successors, (42), 23 states have internal predecessors, (42), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2025-02-07 17:14:49,915 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-07 17:14:49,915 INFO L93 Difference]: Finished difference Result 500 states and 668 transitions. [2025-02-07 17:14:49,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2025-02-07 17:14:49,916 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.826086956521739) internal successors, (42), 23 states have internal predecessors, (42), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) Word has length 50 [2025-02-07 17:14:49,916 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-07 17:14:49,918 INFO L225 Difference]: With dead ends: 500 [2025-02-07 17:14:49,918 INFO L226 Difference]: Without dead ends: 497 [2025-02-07 17:14:49,919 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 80 SyntacticMatches, 12 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 359 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=206, Invalid=606, Unknown=0, NotChecked=0, Total=812 [2025-02-07 17:14:49,919 INFO L435 NwaCegarLoop]: 127 mSDtfsCounter, 130 mSDsluCounter, 594 mSDsCounter, 0 mSdLazyCounter, 851 mSolverCounterSat, 94 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 150 SdHoareTripleChecker+Valid, 721 SdHoareTripleChecker+Invalid, 945 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 94 IncrementalHoareTripleChecker+Valid, 851 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2025-02-07 17:14:49,919 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [150 Valid, 721 Invalid, 945 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [94 Valid, 851 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2025-02-07 17:14:49,920 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 497 states. [2025-02-07 17:14:49,993 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 497 to 460. [2025-02-07 17:14:49,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 460 states, 306 states have (on average 1.1339869281045751) internal successors, (347), 307 states have internal predecessors, (347), 141 states have call successors, (141), 12 states have call predecessors, (141), 12 states have return successors, (141), 140 states have call predecessors, (141), 141 states have call successors, (141) [2025-02-07 17:14:49,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 460 states to 460 states and 629 transitions. [2025-02-07 17:14:49,996 INFO L78 Accepts]: Start accepts. Automaton has 460 states and 629 transitions. Word has length 50 [2025-02-07 17:14:49,996 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-07 17:14:49,996 INFO L471 AbstractCegarLoop]: Abstraction has 460 states and 629 transitions. [2025-02-07 17:14:49,996 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.826086956521739) internal successors, (42), 23 states have internal predecessors, (42), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2025-02-07 17:14:49,996 INFO L276 IsEmpty]: Start isEmpty. Operand 460 states and 629 transitions. [2025-02-07 17:14:49,997 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2025-02-07 17:14:49,997 INFO L210 NwaCegarLoop]: Found error trace [2025-02-07 17:14:49,997 INFO L218 NwaCegarLoop]: trace histogram [6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-07 17:14:50,004 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2025-02-07 17:14:50,197 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,16 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-07 17:14:50,198 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-07 17:14:50,198 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-07 17:14:50,198 INFO L85 PathProgramCache]: Analyzing trace with hash -585688932, now seen corresponding path program 16 times [2025-02-07 17:14:50,198 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-07 17:14:50,198 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1093817920] [2025-02-07 17:14:50,198 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-02-07 17:14:50,199 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-07 17:14:50,204 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 51 statements into 2 equivalence classes. [2025-02-07 17:14:50,223 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 51 of 51 statements. [2025-02-07 17:14:50,223 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-02-07 17:14:50,224 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unknown [2025-02-07 17:14:50,224 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [831501084] [2025-02-07 17:14:50,224 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-02-07 17:14:50,224 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-07 17:14:50,225 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-07 17:14:50,226 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-07 17:14:50,228 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2025-02-07 17:14:50,279 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 51 statements into 2 equivalence classes. [2025-02-07 17:14:50,449 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 51 of 51 statements. [2025-02-07 17:14:50,449 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-02-07 17:14:50,449 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 17:14:50,453 INFO L256 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 105 conjuncts are in the unsatisfiable core [2025-02-07 17:14:50,456 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-07 17:14:50,477 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2025-02-07 17:14:50,484 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2025-02-07 17:14:50,507 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2025-02-07 17:14:50,514 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2025-02-07 17:14:50,548 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-02-07 17:14:50,549 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 28 [2025-02-07 17:14:50,560 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-02-07 17:14:50,560 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 28 [2025-02-07 17:14:50,603 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-02-07 17:14:50,604 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 38 [2025-02-07 17:14:50,618 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-02-07 17:14:50,618 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 38 [2025-02-07 17:14:50,680 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-02-07 17:14:50,681 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 10 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 40 treesize of output 48 [2025-02-07 17:14:50,696 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-02-07 17:14:50,696 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 10 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 40 treesize of output 48 [2025-02-07 17:14:50,750 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-02-07 17:14:50,751 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 15 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 47 treesize of output 58 [2025-02-07 17:14:50,770 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-02-07 17:14:50,770 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 15 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 47 treesize of output 58 [2025-02-07 17:14:52,683 INFO L349 Elim1Store]: treesize reduction 264, result has 33.5 percent of original size [2025-02-07 17:14:52,683 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 12 select indices, 12 select index equivalence classes, 15 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 78 case distinctions, treesize of input 98 treesize of output 180 [2025-02-07 17:14:52,872 INFO L349 Elim1Store]: treesize reduction 240, result has 35.7 percent of original size [2025-02-07 17:14:52,872 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 12 select indices, 12 select index equivalence classes, 15 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 78 case distinctions, treesize of input 98 treesize of output 178 [2025-02-07 17:14:55,922 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-02-07 17:14:55,923 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 15 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 261 treesize of output 133 [2025-02-07 17:14:55,931 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-02-07 17:14:55,932 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 15 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 399 treesize of output 223 [2025-02-07 17:14:55,997 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 16 proven. 42 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2025-02-07 17:14:55,998 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-07 17:14:57,889 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-07 17:14:57,890 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1093817920] [2025-02-07 17:14:57,890 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2025-02-07 17:14:57,890 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [831501084] [2025-02-07 17:14:57,890 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [831501084] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-07 17:14:57,890 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2025-02-07 17:14:57,890 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2025-02-07 17:14:57,890 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [298396366] [2025-02-07 17:14:57,890 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2025-02-07 17:14:57,890 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2025-02-07 17:14:57,890 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-07 17:14:57,890 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2025-02-07 17:14:57,891 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=221, Invalid=1585, Unknown=0, NotChecked=0, Total=1806 [2025-02-07 17:14:57,891 INFO L87 Difference]: Start difference. First operand 460 states and 629 transitions. Second operand has 26 states, 23 states have (on average 1.391304347826087) internal successors, (32), 23 states have internal predecessors, (32), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 3 states have call predecessors, (5), 5 states have call successors, (5) [2025-02-07 17:14:58,904 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-07 17:14:58,904 INFO L93 Difference]: Finished difference Result 500 states and 678 transitions. [2025-02-07 17:14:58,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2025-02-07 17:14:58,905 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 23 states have (on average 1.391304347826087) internal successors, (32), 23 states have internal predecessors, (32), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 3 states have call predecessors, (5), 5 states have call successors, (5) Word has length 51 [2025-02-07 17:14:58,905 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-07 17:14:58,907 INFO L225 Difference]: With dead ends: 500 [2025-02-07 17:14:58,907 INFO L226 Difference]: Without dead ends: 497 [2025-02-07 17:14:58,907 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 32 SyntacticMatches, 4 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 450 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=230, Invalid=1662, Unknown=0, NotChecked=0, Total=1892 [2025-02-07 17:14:58,909 INFO L435 NwaCegarLoop]: 43 mSDtfsCounter, 22 mSDsluCounter, 240 mSDsCounter, 0 mSdLazyCounter, 937 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 283 SdHoareTripleChecker+Invalid, 944 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 937 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2025-02-07 17:14:58,910 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [36 Valid, 283 Invalid, 944 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 937 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2025-02-07 17:14:58,914 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 497 states. [2025-02-07 17:14:58,988 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 497 to 478. [2025-02-07 17:14:58,989 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 478 states, 319 states have (on average 1.134796238244514) internal successors, (362), 320 states have internal predecessors, (362), 145 states have call successors, (145), 13 states have call predecessors, (145), 13 states have return successors, (145), 144 states have call predecessors, (145), 145 states have call successors, (145) [2025-02-07 17:14:58,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 478 states to 478 states and 652 transitions. [2025-02-07 17:14:58,991 INFO L78 Accepts]: Start accepts. Automaton has 478 states and 652 transitions. Word has length 51 [2025-02-07 17:14:58,991 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-07 17:14:58,991 INFO L471 AbstractCegarLoop]: Abstraction has 478 states and 652 transitions. [2025-02-07 17:14:58,991 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 23 states have (on average 1.391304347826087) internal successors, (32), 23 states have internal predecessors, (32), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 3 states have call predecessors, (5), 5 states have call successors, (5) [2025-02-07 17:14:58,991 INFO L276 IsEmpty]: Start isEmpty. Operand 478 states and 652 transitions. [2025-02-07 17:14:58,992 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2025-02-07 17:14:58,992 INFO L210 NwaCegarLoop]: Found error trace [2025-02-07 17:14:58,992 INFO L218 NwaCegarLoop]: trace histogram [7, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-07 17:14:59,003 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2025-02-07 17:14:59,196 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,17 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-07 17:14:59,196 INFO L396 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-07 17:14:59,196 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-07 17:14:59,196 INFO L85 PathProgramCache]: Analyzing trace with hash -976455955, now seen corresponding path program 17 times [2025-02-07 17:14:59,196 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-07 17:14:59,196 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [84829061] [2025-02-07 17:14:59,196 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-02-07 17:14:59,196 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-07 17:14:59,203 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 52 statements into 8 equivalence classes. [2025-02-07 17:14:59,246 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) and asserted 52 of 52 statements. [2025-02-07 17:14:59,248 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2025-02-07 17:14:59,248 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 17:14:59,394 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 28 proven. 21 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2025-02-07 17:14:59,395 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-07 17:14:59,395 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [84829061] [2025-02-07 17:14:59,395 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [84829061] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-07 17:14:59,395 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [348963562] [2025-02-07 17:14:59,395 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-02-07 17:14:59,395 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-07 17:14:59,395 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-07 17:14:59,397 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-07 17:14:59,398 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2025-02-07 17:14:59,457 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 52 statements into 8 equivalence classes. [2025-02-07 17:14:59,601 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) and asserted 52 of 52 statements. [2025-02-07 17:14:59,601 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2025-02-07 17:14:59,601 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 17:14:59,602 INFO L256 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 16 conjuncts are in the unsatisfiable core [2025-02-07 17:14:59,603 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-07 17:14:59,732 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 44 proven. 21 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2025-02-07 17:14:59,732 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-07 17:14:59,817 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 28 proven. 21 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2025-02-07 17:14:59,817 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [348963562] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-07 17:14:59,817 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-07 17:14:59,817 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 24 [2025-02-07 17:14:59,817 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [851636206] [2025-02-07 17:14:59,817 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-07 17:14:59,818 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2025-02-07 17:14:59,818 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-07 17:14:59,818 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2025-02-07 17:14:59,818 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=409, Unknown=0, NotChecked=0, Total=552 [2025-02-07 17:14:59,818 INFO L87 Difference]: Start difference. First operand 478 states and 652 transitions. Second operand has 24 states, 24 states have (on average 1.7083333333333333) internal successors, (41), 24 states have internal predecessors, (41), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2025-02-07 17:15:00,779 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-07 17:15:00,779 INFO L93 Difference]: Finished difference Result 1278 states and 1745 transitions. [2025-02-07 17:15:00,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2025-02-07 17:15:00,781 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.7083333333333333) internal successors, (41), 24 states have internal predecessors, (41), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) Word has length 52 [2025-02-07 17:15:00,781 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-07 17:15:00,785 INFO L225 Difference]: With dead ends: 1278 [2025-02-07 17:15:00,785 INFO L226 Difference]: Without dead ends: 899 [2025-02-07 17:15:00,787 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 83 SyntacticMatches, 14 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 640 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=558, Invalid=1698, Unknown=0, NotChecked=0, Total=2256 [2025-02-07 17:15:00,787 INFO L435 NwaCegarLoop]: 94 mSDtfsCounter, 845 mSDsluCounter, 317 mSDsCounter, 0 mSdLazyCounter, 676 mSolverCounterSat, 706 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 873 SdHoareTripleChecker+Valid, 411 SdHoareTripleChecker+Invalid, 1382 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 706 IncrementalHoareTripleChecker+Valid, 676 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2025-02-07 17:15:00,787 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [873 Valid, 411 Invalid, 1382 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [706 Valid, 676 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2025-02-07 17:15:00,788 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 899 states. [2025-02-07 17:15:00,897 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 899 to 614. [2025-02-07 17:15:00,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 614 states, 406 states have (on average 1.1354679802955665) internal successors, (461), 407 states have internal predecessors, (461), 193 states have call successors, (193), 14 states have call predecessors, (193), 14 states have return successors, (193), 192 states have call predecessors, (193), 193 states have call successors, (193) [2025-02-07 17:15:00,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 614 states to 614 states and 847 transitions. [2025-02-07 17:15:00,901 INFO L78 Accepts]: Start accepts. Automaton has 614 states and 847 transitions. Word has length 52 [2025-02-07 17:15:00,901 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-07 17:15:00,901 INFO L471 AbstractCegarLoop]: Abstraction has 614 states and 847 transitions. [2025-02-07 17:15:00,901 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 1.7083333333333333) internal successors, (41), 24 states have internal predecessors, (41), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2025-02-07 17:15:00,901 INFO L276 IsEmpty]: Start isEmpty. Operand 614 states and 847 transitions. [2025-02-07 17:15:00,902 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2025-02-07 17:15:00,902 INFO L210 NwaCegarLoop]: Found error trace [2025-02-07 17:15:00,902 INFO L218 NwaCegarLoop]: trace histogram [7, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-07 17:15:00,911 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2025-02-07 17:15:01,106 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,18 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-07 17:15:01,106 INFO L396 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-07 17:15:01,106 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-07 17:15:01,107 INFO L85 PathProgramCache]: Analyzing trace with hash 1402043170, now seen corresponding path program 18 times [2025-02-07 17:15:01,107 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-07 17:15:01,107 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [93820730] [2025-02-07 17:15:01,107 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-02-07 17:15:01,107 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-07 17:15:01,113 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 52 statements into 9 equivalence classes. [2025-02-07 17:15:01,135 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) and asserted 52 of 52 statements. [2025-02-07 17:15:01,135 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2025-02-07 17:15:01,135 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 17:15:01,445 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 21 proven. 28 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2025-02-07 17:15:01,445 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-07 17:15:01,445 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [93820730] [2025-02-07 17:15:01,445 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [93820730] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-07 17:15:01,445 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2126369924] [2025-02-07 17:15:01,445 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-02-07 17:15:01,446 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-07 17:15:01,446 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-07 17:15:01,448 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-07 17:15:01,453 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2025-02-07 17:15:01,523 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 52 statements into 9 equivalence classes. [2025-02-07 17:15:02,949 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) and asserted 52 of 52 statements. [2025-02-07 17:15:02,949 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2025-02-07 17:15:02,949 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 17:15:02,952 INFO L256 TraceCheckSpWp]: Trace formula consists of 239 conjuncts, 16 conjuncts are in the unsatisfiable core [2025-02-07 17:15:02,953 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-07 17:15:03,064 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 37 proven. 28 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2025-02-07 17:15:03,065 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-07 17:15:03,178 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 21 proven. 28 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2025-02-07 17:15:03,178 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2126369924] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-07 17:15:03,178 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-07 17:15:03,178 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 25 [2025-02-07 17:15:03,178 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1806641215] [2025-02-07 17:15:03,178 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-07 17:15:03,178 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2025-02-07 17:15:03,178 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-07 17:15:03,179 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2025-02-07 17:15:03,179 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=161, Invalid=439, Unknown=0, NotChecked=0, Total=600 [2025-02-07 17:15:03,179 INFO L87 Difference]: Start difference. First operand 614 states and 847 transitions. Second operand has 25 states, 25 states have (on average 1.72) internal successors, (43), 25 states have internal predecessors, (43), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2025-02-07 17:15:03,670 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-07 17:15:03,671 INFO L93 Difference]: Finished difference Result 671 states and 903 transitions. [2025-02-07 17:15:03,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2025-02-07 17:15:03,674 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.72) internal successors, (43), 25 states have internal predecessors, (43), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) Word has length 52 [2025-02-07 17:15:03,674 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-07 17:15:03,676 INFO L225 Difference]: With dead ends: 671 [2025-02-07 17:15:03,676 INFO L226 Difference]: Without dead ends: 668 [2025-02-07 17:15:03,677 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 82 SyntacticMatches, 14 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 432 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=259, Invalid=733, Unknown=0, NotChecked=0, Total=992 [2025-02-07 17:15:03,678 INFO L435 NwaCegarLoop]: 151 mSDtfsCounter, 204 mSDsluCounter, 442 mSDsCounter, 0 mSdLazyCounter, 720 mSolverCounterSat, 151 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 228 SdHoareTripleChecker+Valid, 593 SdHoareTripleChecker+Invalid, 871 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 151 IncrementalHoareTripleChecker+Valid, 720 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2025-02-07 17:15:03,678 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [228 Valid, 593 Invalid, 871 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [151 Valid, 720 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2025-02-07 17:15:03,679 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 668 states. [2025-02-07 17:15:03,777 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 668 to 615. [2025-02-07 17:15:03,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 615 states, 407 states have (on average 1.135135135135135) internal successors, (462), 408 states have internal predecessors, (462), 193 states have call successors, (193), 14 states have call predecessors, (193), 14 states have return successors, (193), 192 states have call predecessors, (193), 193 states have call successors, (193) [2025-02-07 17:15:03,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 615 states to 615 states and 848 transitions. [2025-02-07 17:15:03,780 INFO L78 Accepts]: Start accepts. Automaton has 615 states and 848 transitions. Word has length 52 [2025-02-07 17:15:03,780 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-07 17:15:03,781 INFO L471 AbstractCegarLoop]: Abstraction has 615 states and 848 transitions. [2025-02-07 17:15:03,781 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.72) internal successors, (43), 25 states have internal predecessors, (43), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2025-02-07 17:15:03,781 INFO L276 IsEmpty]: Start isEmpty. Operand 615 states and 848 transitions. [2025-02-07 17:15:03,781 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2025-02-07 17:15:03,781 INFO L210 NwaCegarLoop]: Found error trace [2025-02-07 17:15:03,781 INFO L218 NwaCegarLoop]: trace histogram [7, 7, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-07 17:15:03,792 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2025-02-07 17:15:03,982 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,19 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-07 17:15:03,982 INFO L396 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-07 17:15:03,983 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-07 17:15:03,983 INFO L85 PathProgramCache]: Analyzing trace with hash 513697063, now seen corresponding path program 19 times [2025-02-07 17:15:03,983 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-07 17:15:03,983 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1174622443] [2025-02-07 17:15:03,983 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-02-07 17:15:03,983 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-07 17:15:03,990 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 53 statements into 1 equivalence classes. [2025-02-07 17:15:04,014 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 53 of 53 statements. [2025-02-07 17:15:04,015 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-07 17:15:04,015 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unknown [2025-02-07 17:15:04,017 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1209534860] [2025-02-07 17:15:04,017 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-02-07 17:15:04,017 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-07 17:15:04,017 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-07 17:15:04,022 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-07 17:15:04,023 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2025-02-07 17:15:04,083 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 53 statements into 1 equivalence classes. [2025-02-07 17:15:04,223 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 53 of 53 statements. [2025-02-07 17:15:04,224 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-07 17:15:04,224 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 17:15:04,226 INFO L256 TraceCheckSpWp]: Trace formula consists of 244 conjuncts, 114 conjuncts are in the unsatisfiable core [2025-02-07 17:15:04,230 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-07 17:15:04,248 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2025-02-07 17:15:04,253 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2025-02-07 17:15:04,270 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2025-02-07 17:15:04,277 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2025-02-07 17:15:04,306 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-02-07 17:15:04,307 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 28 [2025-02-07 17:15:04,317 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-02-07 17:15:04,317 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 28 [2025-02-07 17:15:04,347 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-02-07 17:15:04,347 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 38 [2025-02-07 17:15:04,363 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-02-07 17:15:04,363 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 38 [2025-02-07 17:15:04,411 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-02-07 17:15:04,412 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 10 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 40 treesize of output 48 [2025-02-07 17:15:04,429 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-02-07 17:15:04,429 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 10 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 40 treesize of output 48 [2025-02-07 17:15:04,494 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-02-07 17:15:04,494 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 15 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 47 treesize of output 58 [2025-02-07 17:15:04,521 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-02-07 17:15:04,521 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 15 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 47 treesize of output 58 [2025-02-07 17:15:04,604 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-02-07 17:15:04,604 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 21 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 54 treesize of output 68 [2025-02-07 17:15:04,626 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-02-07 17:15:04,627 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 21 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 54 treesize of output 68 [2025-02-07 17:15:07,056 INFO L349 Elim1Store]: treesize reduction 280, result has 35.6 percent of original size [2025-02-07 17:15:07,056 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 14 select indices, 14 select index equivalence classes, 21 disjoint index pairs (out of 91 index pairs), introduced 14 new quantified variables, introduced 105 case distinctions, treesize of input 112 treesize of output 206 [2025-02-07 17:15:07,353 INFO L349 Elim1Store]: treesize reduction 308, result has 33.5 percent of original size [2025-02-07 17:15:07,354 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 14 select indices, 14 select index equivalence classes, 21 disjoint index pairs (out of 91 index pairs), introduced 14 new quantified variables, introduced 105 case distinctions, treesize of input 112 treesize of output 208 [2025-02-07 17:15:11,878 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-02-07 17:15:11,879 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 7 select indices, 7 select index equivalence classes, 21 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 21 case distinctions, treesize of input 330 treesize of output 166 [2025-02-07 17:15:11,891 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-02-07 17:15:11,891 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 7 select indices, 7 select index equivalence classes, 21 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 21 case distinctions, treesize of input 503 treesize of output 283 [2025-02-07 17:15:11,976 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 16 proven. 72 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2025-02-07 17:15:11,976 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-07 17:15:14,411 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-07 17:15:14,412 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1174622443] [2025-02-07 17:15:14,412 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2025-02-07 17:15:14,412 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1209534860] [2025-02-07 17:15:14,412 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1209534860] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-07 17:15:14,412 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2025-02-07 17:15:14,412 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31] total 31 [2025-02-07 17:15:14,412 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [90508674] [2025-02-07 17:15:14,412 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2025-02-07 17:15:14,412 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2025-02-07 17:15:14,413 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-07 17:15:14,413 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2025-02-07 17:15:14,413 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=224, Invalid=2128, Unknown=0, NotChecked=0, Total=2352 [2025-02-07 17:15:14,413 INFO L87 Difference]: Start difference. First operand 615 states and 848 transitions. Second operand has 31 states, 28 states have (on average 1.3214285714285714) internal successors, (37), 27 states have internal predecessors, (37), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 3 states have call predecessors, (5), 5 states have call successors, (5) [2025-02-07 17:15:16,462 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-07 17:15:16,462 INFO L93 Difference]: Finished difference Result 658 states and 900 transitions. [2025-02-07 17:15:16,463 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2025-02-07 17:15:16,463 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 28 states have (on average 1.3214285714285714) internal successors, (37), 27 states have internal predecessors, (37), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 3 states have call predecessors, (5), 5 states have call successors, (5) Word has length 53 [2025-02-07 17:15:16,463 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-07 17:15:16,465 INFO L225 Difference]: With dead ends: 658 [2025-02-07 17:15:16,466 INFO L226 Difference]: Without dead ends: 655 [2025-02-07 17:15:16,466 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 28 SyntacticMatches, 5 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 705 ImplicationChecksByTransitivity, 4.8s TimeCoverageRelationStatistics Valid=322, Invalid=2540, Unknown=0, NotChecked=0, Total=2862 [2025-02-07 17:15:16,468 INFO L435 NwaCegarLoop]: 43 mSDtfsCounter, 42 mSDsluCounter, 309 mSDsCounter, 0 mSdLazyCounter, 1210 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 352 SdHoareTripleChecker+Invalid, 1243 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 1210 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2025-02-07 17:15:16,468 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [55 Valid, 352 Invalid, 1243 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 1210 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2025-02-07 17:15:16,468 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 655 states. [2025-02-07 17:15:16,579 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 655 to 633. [2025-02-07 17:15:16,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 633 states, 420 states have (on average 1.1357142857142857) internal successors, (477), 421 states have internal predecessors, (477), 197 states have call successors, (197), 15 states have call predecessors, (197), 15 states have return successors, (197), 196 states have call predecessors, (197), 197 states have call successors, (197) [2025-02-07 17:15:16,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 633 states to 633 states and 871 transitions. [2025-02-07 17:15:16,582 INFO L78 Accepts]: Start accepts. Automaton has 633 states and 871 transitions. Word has length 53 [2025-02-07 17:15:16,582 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-07 17:15:16,582 INFO L471 AbstractCegarLoop]: Abstraction has 633 states and 871 transitions. [2025-02-07 17:15:16,583 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 28 states have (on average 1.3214285714285714) internal successors, (37), 27 states have internal predecessors, (37), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 3 states have call predecessors, (5), 5 states have call successors, (5) [2025-02-07 17:15:16,583 INFO L276 IsEmpty]: Start isEmpty. Operand 633 states and 871 transitions. [2025-02-07 17:15:16,583 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2025-02-07 17:15:16,583 INFO L210 NwaCegarLoop]: Found error trace [2025-02-07 17:15:16,583 INFO L218 NwaCegarLoop]: trace histogram [8, 7, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-07 17:15:16,591 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2025-02-07 17:15:16,784 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,20 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-07 17:15:16,784 INFO L396 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-07 17:15:16,785 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-07 17:15:16,785 INFO L85 PathProgramCache]: Analyzing trace with hash -1255228478, now seen corresponding path program 20 times [2025-02-07 17:15:16,785 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-07 17:15:16,785 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1968576790] [2025-02-07 17:15:16,785 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-07 17:15:16,785 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-07 17:15:16,792 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 54 statements into 2 equivalence classes. [2025-02-07 17:15:16,796 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 54 of 54 statements. [2025-02-07 17:15:16,796 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-02-07 17:15:16,797 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 17:15:16,968 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 29 proven. 35 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2025-02-07 17:15:16,968 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-07 17:15:16,968 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1968576790] [2025-02-07 17:15:16,968 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1968576790] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-07 17:15:16,968 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1731449084] [2025-02-07 17:15:16,968 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-07 17:15:16,968 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-07 17:15:16,969 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-07 17:15:16,970 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-07 17:15:16,972 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2025-02-07 17:15:17,042 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 54 statements into 2 equivalence classes. [2025-02-07 17:15:17,064 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 54 of 54 statements. [2025-02-07 17:15:17,064 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-02-07 17:15:17,065 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 17:15:17,066 INFO L256 TraceCheckSpWp]: Trace formula consists of 249 conjuncts, 18 conjuncts are in the unsatisfiable core [2025-02-07 17:15:17,067 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-07 17:15:17,231 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 52 proven. 28 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2025-02-07 17:15:17,231 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-07 17:15:17,363 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 36 proven. 28 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2025-02-07 17:15:17,363 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1731449084] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-07 17:15:17,364 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-07 17:15:17,364 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 19] total 29 [2025-02-07 17:15:17,364 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [428371773] [2025-02-07 17:15:17,364 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-07 17:15:17,364 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2025-02-07 17:15:17,364 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-07 17:15:17,365 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2025-02-07 17:15:17,365 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=203, Invalid=609, Unknown=0, NotChecked=0, Total=812 [2025-02-07 17:15:17,365 INFO L87 Difference]: Start difference. First operand 633 states and 871 transitions. Second operand has 29 states, 29 states have (on average 1.6551724137931034) internal successors, (48), 29 states have internal predecessors, (48), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2025-02-07 17:15:18,623 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-07 17:15:18,623 INFO L93 Difference]: Finished difference Result 1747 states and 2393 transitions. [2025-02-07 17:15:18,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2025-02-07 17:15:18,624 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.6551724137931034) internal successors, (48), 29 states have internal predecessors, (48), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) Word has length 54 [2025-02-07 17:15:18,624 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-07 17:15:18,628 INFO L225 Difference]: With dead ends: 1747 [2025-02-07 17:15:18,628 INFO L226 Difference]: Without dead ends: 1228 [2025-02-07 17:15:18,630 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 83 SyntacticMatches, 15 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1168 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=813, Invalid=2727, Unknown=0, NotChecked=0, Total=3540 [2025-02-07 17:15:18,630 INFO L435 NwaCegarLoop]: 104 mSDtfsCounter, 984 mSDsluCounter, 440 mSDsCounter, 0 mSdLazyCounter, 1002 mSolverCounterSat, 818 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1016 SdHoareTripleChecker+Valid, 544 SdHoareTripleChecker+Invalid, 1820 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 818 IncrementalHoareTripleChecker+Valid, 1002 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2025-02-07 17:15:18,630 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [1016 Valid, 544 Invalid, 1820 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [818 Valid, 1002 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2025-02-07 17:15:18,631 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1228 states. [2025-02-07 17:15:18,776 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1228 to 791. [2025-02-07 17:15:18,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 791 states, 521 states have (on average 1.1362763915547025) internal successors, (592), 522 states have internal predecessors, (592), 253 states have call successors, (253), 16 states have call predecessors, (253), 16 states have return successors, (253), 252 states have call predecessors, (253), 253 states have call successors, (253) [2025-02-07 17:15:18,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 791 states to 791 states and 1098 transitions. [2025-02-07 17:15:18,781 INFO L78 Accepts]: Start accepts. Automaton has 791 states and 1098 transitions. Word has length 54 [2025-02-07 17:15:18,781 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-07 17:15:18,781 INFO L471 AbstractCegarLoop]: Abstraction has 791 states and 1098 transitions. [2025-02-07 17:15:18,782 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 1.6551724137931034) internal successors, (48), 29 states have internal predecessors, (48), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2025-02-07 17:15:18,782 INFO L276 IsEmpty]: Start isEmpty. Operand 791 states and 1098 transitions. [2025-02-07 17:15:18,782 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2025-02-07 17:15:18,782 INFO L210 NwaCegarLoop]: Found error trace [2025-02-07 17:15:18,782 INFO L218 NwaCegarLoop]: trace histogram [8, 7, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-07 17:15:18,792 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2025-02-07 17:15:18,987 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,21 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-07 17:15:18,987 INFO L396 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-07 17:15:18,988 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-07 17:15:18,988 INFO L85 PathProgramCache]: Analyzing trace with hash -536199635, now seen corresponding path program 21 times [2025-02-07 17:15:18,988 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-07 17:15:18,988 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1861221812] [2025-02-07 17:15:18,988 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-02-07 17:15:18,988 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-07 17:15:19,000 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 54 statements into 9 equivalence classes. [2025-02-07 17:15:19,034 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) and asserted 54 of 54 statements. [2025-02-07 17:15:19,034 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2025-02-07 17:15:19,035 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 17:15:19,229 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 21 proven. 43 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2025-02-07 17:15:19,229 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-07 17:15:19,229 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1861221812] [2025-02-07 17:15:19,230 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1861221812] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-07 17:15:19,230 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1209349771] [2025-02-07 17:15:19,230 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-02-07 17:15:19,230 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-07 17:15:19,230 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-07 17:15:19,232 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-07 17:15:19,233 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2025-02-07 17:15:19,307 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 54 statements into 9 equivalence classes. [2025-02-07 17:15:19,376 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) and asserted 54 of 54 statements. [2025-02-07 17:15:19,376 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2025-02-07 17:15:19,376 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 17:15:19,377 INFO L256 TraceCheckSpWp]: Trace formula consists of 255 conjuncts, 18 conjuncts are in the unsatisfiable core [2025-02-07 17:15:19,378 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-07 17:15:19,523 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 44 proven. 36 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2025-02-07 17:15:19,523 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-07 17:15:19,667 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 28 proven. 36 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2025-02-07 17:15:19,668 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1209349771] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-07 17:15:19,668 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-07 17:15:19,668 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 19] total 29 [2025-02-07 17:15:19,668 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [918314114] [2025-02-07 17:15:19,668 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-07 17:15:19,669 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2025-02-07 17:15:19,669 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-07 17:15:19,669 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2025-02-07 17:15:19,669 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=203, Invalid=609, Unknown=0, NotChecked=0, Total=812 [2025-02-07 17:15:19,670 INFO L87 Difference]: Start difference. First operand 791 states and 1098 transitions. Second operand has 29 states, 29 states have (on average 1.6551724137931034) internal successors, (48), 29 states have internal predecessors, (48), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2025-02-07 17:15:20,593 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-07 17:15:20,593 INFO L93 Difference]: Finished difference Result 867 states and 1173 transitions. [2025-02-07 17:15:20,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2025-02-07 17:15:20,594 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.6551724137931034) internal successors, (48), 29 states have internal predecessors, (48), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) Word has length 54 [2025-02-07 17:15:20,594 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-07 17:15:20,597 INFO L225 Difference]: With dead ends: 867 [2025-02-07 17:15:20,597 INFO L226 Difference]: Without dead ends: 864 [2025-02-07 17:15:20,598 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 82 SyntacticMatches, 16 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 629 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=327, Invalid=1005, Unknown=0, NotChecked=0, Total=1332 [2025-02-07 17:15:20,598 INFO L435 NwaCegarLoop]: 175 mSDtfsCounter, 212 mSDsluCounter, 774 mSDsCounter, 0 mSdLazyCounter, 1329 mSolverCounterSat, 156 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 240 SdHoareTripleChecker+Valid, 949 SdHoareTripleChecker+Invalid, 1485 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 156 IncrementalHoareTripleChecker+Valid, 1329 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2025-02-07 17:15:20,598 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [240 Valid, 949 Invalid, 1485 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [156 Valid, 1329 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2025-02-07 17:15:20,599 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 864 states. [2025-02-07 17:15:20,763 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 864 to 792. [2025-02-07 17:15:20,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 792 states, 522 states have (on average 1.1360153256704981) internal successors, (593), 523 states have internal predecessors, (593), 253 states have call successors, (253), 16 states have call predecessors, (253), 16 states have return successors, (253), 252 states have call predecessors, (253), 253 states have call successors, (253) [2025-02-07 17:15:20,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 792 states to 792 states and 1099 transitions. [2025-02-07 17:15:20,772 INFO L78 Accepts]: Start accepts. Automaton has 792 states and 1099 transitions. Word has length 54 [2025-02-07 17:15:20,772 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-07 17:15:20,772 INFO L471 AbstractCegarLoop]: Abstraction has 792 states and 1099 transitions. [2025-02-07 17:15:20,773 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 1.6551724137931034) internal successors, (48), 29 states have internal predecessors, (48), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2025-02-07 17:15:20,773 INFO L276 IsEmpty]: Start isEmpty. Operand 792 states and 1099 transitions. [2025-02-07 17:15:20,773 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2025-02-07 17:15:20,774 INFO L210 NwaCegarLoop]: Found error trace [2025-02-07 17:15:20,774 INFO L218 NwaCegarLoop]: trace histogram [8, 8, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-07 17:15:20,781 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2025-02-07 17:15:20,974 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2025-02-07 17:15:20,975 INFO L396 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-07 17:15:20,975 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-07 17:15:20,975 INFO L85 PathProgramCache]: Analyzing trace with hash 557712252, now seen corresponding path program 22 times [2025-02-07 17:15:20,975 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-07 17:15:20,975 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [198222934] [2025-02-07 17:15:20,975 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-02-07 17:15:20,975 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-07 17:15:20,982 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 55 statements into 2 equivalence classes. [2025-02-07 17:15:21,009 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 55 of 55 statements. [2025-02-07 17:15:21,010 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-02-07 17:15:21,010 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unknown [2025-02-07 17:15:21,011 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1183684202] [2025-02-07 17:15:21,011 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-02-07 17:15:21,011 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-07 17:15:21,011 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-07 17:15:21,013 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-07 17:15:21,014 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2025-02-07 17:15:21,085 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 55 statements into 2 equivalence classes. [2025-02-07 17:15:21,475 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 55 of 55 statements. [2025-02-07 17:15:21,475 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-02-07 17:15:21,475 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 17:15:21,479 INFO L256 TraceCheckSpWp]: Trace formula consists of 260 conjuncts, 128 conjuncts are in the unsatisfiable core [2025-02-07 17:15:21,482 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-07 17:15:21,502 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2025-02-07 17:15:21,508 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2025-02-07 17:15:21,528 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2025-02-07 17:15:21,538 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2025-02-07 17:15:21,567 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-02-07 17:15:21,568 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 28 [2025-02-07 17:15:21,579 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-02-07 17:15:21,579 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 28 [2025-02-07 17:15:21,614 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-02-07 17:15:21,614 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 38 [2025-02-07 17:15:21,628 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-02-07 17:15:21,628 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 38 [2025-02-07 17:15:21,671 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-02-07 17:15:21,672 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 10 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 40 treesize of output 48 [2025-02-07 17:15:21,685 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-02-07 17:15:21,686 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 10 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 40 treesize of output 48 [2025-02-07 17:15:21,738 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-02-07 17:15:21,738 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 15 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 47 treesize of output 58 [2025-02-07 17:15:21,757 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-02-07 17:15:21,757 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 15 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 47 treesize of output 58 [2025-02-07 17:15:21,823 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-02-07 17:15:21,823 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 21 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 54 treesize of output 68 [2025-02-07 17:15:21,843 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-02-07 17:15:21,843 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 21 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 54 treesize of output 68 [2025-02-07 17:15:21,927 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-02-07 17:15:21,927 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 28 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 21 case distinctions, treesize of input 61 treesize of output 78 [2025-02-07 17:15:21,947 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-02-07 17:15:21,947 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 28 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 21 case distinctions, treesize of input 61 treesize of output 78 [2025-02-07 17:15:24,377 INFO L349 Elim1Store]: treesize reduction 320, result has 35.6 percent of original size [2025-02-07 17:15:24,377 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 16 select indices, 16 select index equivalence classes, 28 disjoint index pairs (out of 120 index pairs), introduced 16 new quantified variables, introduced 136 case distinctions, treesize of input 126 treesize of output 234 [2025-02-07 17:15:24,646 INFO L349 Elim1Store]: treesize reduction 352, result has 33.5 percent of original size [2025-02-07 17:15:24,647 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 16 select indices, 16 select index equivalence classes, 28 disjoint index pairs (out of 120 index pairs), introduced 16 new quantified variables, introduced 136 case distinctions, treesize of input 126 treesize of output 236 [2025-02-07 17:15:31,842 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-02-07 17:15:31,842 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 28 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 406 treesize of output 202 [2025-02-07 17:15:31,858 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-02-07 17:15:31,858 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 28 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 817 treesize of output 389 [2025-02-07 17:15:31,957 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 16 proven. 72 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2025-02-07 17:15:31,957 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-07 17:15:34,785 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-07 17:15:34,785 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [198222934] [2025-02-07 17:15:34,785 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2025-02-07 17:15:34,785 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1183684202] [2025-02-07 17:15:34,785 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1183684202] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-07 17:15:34,785 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2025-02-07 17:15:34,785 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30] total 30 [2025-02-07 17:15:34,785 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [371024878] [2025-02-07 17:15:34,785 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2025-02-07 17:15:34,785 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2025-02-07 17:15:34,786 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-07 17:15:34,786 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2025-02-07 17:15:34,786 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=307, Invalid=2143, Unknown=0, NotChecked=0, Total=2450 [2025-02-07 17:15:34,786 INFO L87 Difference]: Start difference. First operand 792 states and 1099 transitions. Second operand has 30 states, 27 states have (on average 1.3333333333333333) internal successors, (36), 27 states have internal predecessors, (36), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 3 states have call predecessors, (5), 5 states have call successors, (5) [2025-02-07 17:15:36,828 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-07 17:15:36,828 INFO L93 Difference]: Finished difference Result 833 states and 1150 transitions. [2025-02-07 17:15:36,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2025-02-07 17:15:36,829 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 27 states have (on average 1.3333333333333333) internal successors, (36), 27 states have internal predecessors, (36), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 3 states have call predecessors, (5), 5 states have call successors, (5) Word has length 55 [2025-02-07 17:15:36,829 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-07 17:15:36,832 INFO L225 Difference]: With dead ends: 833 [2025-02-07 17:15:36,832 INFO L226 Difference]: Without dead ends: 818 [2025-02-07 17:15:36,833 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 31 SyntacticMatches, 4 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 532 ImplicationChecksByTransitivity, 5.6s TimeCoverageRelationStatistics Valid=330, Invalid=2322, Unknown=0, NotChecked=0, Total=2652 [2025-02-07 17:15:36,833 INFO L435 NwaCegarLoop]: 43 mSDtfsCounter, 8 mSDsluCounter, 351 mSDsCounter, 0 mSdLazyCounter, 1420 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 394 SdHoareTripleChecker+Invalid, 1430 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 1420 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2025-02-07 17:15:36,833 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 394 Invalid, 1430 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 1420 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2025-02-07 17:15:36,834 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 818 states. [2025-02-07 17:15:36,976 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 818 to 808. [2025-02-07 17:15:36,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 808 states, 533 states have (on average 1.1350844277673546) internal successors, (605), 534 states have internal predecessors, (605), 257 states have call successors, (257), 17 states have call predecessors, (257), 17 states have return successors, (257), 256 states have call predecessors, (257), 257 states have call successors, (257) [2025-02-07 17:15:36,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 808 states to 808 states and 1119 transitions. [2025-02-07 17:15:36,980 INFO L78 Accepts]: Start accepts. Automaton has 808 states and 1119 transitions. Word has length 55 [2025-02-07 17:15:36,980 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-07 17:15:36,980 INFO L471 AbstractCegarLoop]: Abstraction has 808 states and 1119 transitions. [2025-02-07 17:15:36,980 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 27 states have (on average 1.3333333333333333) internal successors, (36), 27 states have internal predecessors, (36), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 3 states have call predecessors, (5), 5 states have call successors, (5) [2025-02-07 17:15:36,980 INFO L276 IsEmpty]: Start isEmpty. Operand 808 states and 1119 transitions. [2025-02-07 17:15:36,982 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2025-02-07 17:15:36,982 INFO L210 NwaCegarLoop]: Found error trace [2025-02-07 17:15:36,982 INFO L218 NwaCegarLoop]: trace histogram [9, 8, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-07 17:15:36,991 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2025-02-07 17:15:37,187 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2025-02-07 17:15:37,188 INFO L396 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-07 17:15:37,188 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-07 17:15:37,188 INFO L85 PathProgramCache]: Analyzing trace with hash 924300034, now seen corresponding path program 23 times [2025-02-07 17:15:37,189 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-07 17:15:37,189 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [581398455] [2025-02-07 17:15:37,189 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-02-07 17:15:37,189 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-07 17:15:37,198 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 56 statements into 10 equivalence classes. [2025-02-07 17:15:37,239 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) and asserted 56 of 56 statements. [2025-02-07 17:15:37,239 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2025-02-07 17:15:37,239 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 17:15:37,448 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 36 proven. 45 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2025-02-07 17:15:37,448 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-07 17:15:37,448 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [581398455] [2025-02-07 17:15:37,448 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [581398455] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-07 17:15:37,448 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [508020289] [2025-02-07 17:15:37,449 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-02-07 17:15:37,449 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-07 17:15:37,449 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-07 17:15:37,450 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-07 17:15:37,452 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2025-02-07 17:15:37,534 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 56 statements into 10 equivalence classes. [2025-02-07 17:15:37,858 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) and asserted 56 of 56 statements. [2025-02-07 17:15:37,858 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2025-02-07 17:15:37,859 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 17:15:37,861 INFO L256 TraceCheckSpWp]: Trace formula consists of 271 conjuncts, 20 conjuncts are in the unsatisfiable core [2025-02-07 17:15:37,862 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-07 17:15:38,008 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 52 proven. 45 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2025-02-07 17:15:38,008 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-07 17:15:38,165 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 36 proven. 45 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2025-02-07 17:15:38,165 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [508020289] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-07 17:15:38,165 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-07 17:15:38,165 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21, 21] total 30 [2025-02-07 17:15:38,165 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1701501649] [2025-02-07 17:15:38,165 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-07 17:15:38,166 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2025-02-07 17:15:38,166 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-07 17:15:38,166 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2025-02-07 17:15:38,166 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=219, Invalid=651, Unknown=0, NotChecked=0, Total=870 [2025-02-07 17:15:38,166 INFO L87 Difference]: Start difference. First operand 808 states and 1119 transitions. Second operand has 30 states, 30 states have (on average 1.5666666666666667) internal successors, (47), 30 states have internal predecessors, (47), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2025-02-07 17:15:38,970 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-07 17:15:38,971 INFO L93 Difference]: Finished difference Result 1120 states and 1518 transitions. [2025-02-07 17:15:38,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2025-02-07 17:15:38,971 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.5666666666666667) internal successors, (47), 30 states have internal predecessors, (47), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) Word has length 56 [2025-02-07 17:15:38,971 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-07 17:15:38,975 INFO L225 Difference]: With dead ends: 1120 [2025-02-07 17:15:38,975 INFO L226 Difference]: Without dead ends: 1015 [2025-02-07 17:15:38,975 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 84 SyntacticMatches, 19 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 700 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=394, Invalid=1166, Unknown=0, NotChecked=0, Total=1560 [2025-02-07 17:15:38,976 INFO L435 NwaCegarLoop]: 199 mSDtfsCounter, 270 mSDsluCounter, 581 mSDsCounter, 0 mSdLazyCounter, 926 mSolverCounterSat, 199 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 302 SdHoareTripleChecker+Valid, 780 SdHoareTripleChecker+Invalid, 1125 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 199 IncrementalHoareTripleChecker+Valid, 926 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2025-02-07 17:15:38,976 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [302 Valid, 780 Invalid, 1125 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [199 Valid, 926 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2025-02-07 17:15:38,976 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1015 states. [2025-02-07 17:15:39,145 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1015 to 913. [2025-02-07 17:15:39,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 913 states, 601 states have (on average 1.1364392678868553) internal successors, (683), 602 states have internal predecessors, (683), 293 states have call successors, (293), 18 states have call predecessors, (293), 18 states have return successors, (293), 292 states have call predecessors, (293), 293 states have call successors, (293) [2025-02-07 17:15:39,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 913 states to 913 states and 1269 transitions. [2025-02-07 17:15:39,149 INFO L78 Accepts]: Start accepts. Automaton has 913 states and 1269 transitions. Word has length 56 [2025-02-07 17:15:39,149 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-07 17:15:39,149 INFO L471 AbstractCegarLoop]: Abstraction has 913 states and 1269 transitions. [2025-02-07 17:15:39,149 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 1.5666666666666667) internal successors, (47), 30 states have internal predecessors, (47), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2025-02-07 17:15:39,149 INFO L276 IsEmpty]: Start isEmpty. Operand 913 states and 1269 transitions. [2025-02-07 17:15:39,150 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2025-02-07 17:15:39,150 INFO L210 NwaCegarLoop]: Found error trace [2025-02-07 17:15:39,150 INFO L218 NwaCegarLoop]: trace histogram [9, 9, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-07 17:15:39,159 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Ended with exit code 0 [2025-02-07 17:15:39,350 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2025-02-07 17:15:39,351 INFO L396 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-07 17:15:39,351 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-07 17:15:39,351 INFO L85 PathProgramCache]: Analyzing trace with hash -1411438265, now seen corresponding path program 24 times [2025-02-07 17:15:39,351 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-07 17:15:39,351 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1626943733] [2025-02-07 17:15:39,351 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-02-07 17:15:39,351 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-07 17:15:39,362 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 57 statements into 10 equivalence classes. [2025-02-07 17:15:39,412 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) and asserted 57 of 57 statements. [2025-02-07 17:15:39,413 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2025-02-07 17:15:39,413 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unknown [2025-02-07 17:15:39,414 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [455630203] [2025-02-07 17:15:39,414 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-02-07 17:15:39,414 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-07 17:15:39,414 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-07 17:15:39,416 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-07 17:15:39,418 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2025-02-07 17:15:39,498 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 57 statements into 10 equivalence classes. [2025-02-07 17:15:41,001 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) and asserted 57 of 57 statements. [2025-02-07 17:15:41,001 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2025-02-07 17:15:41,001 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 17:15:41,006 WARN L254 TraceCheckSpWp]: Trace formula consists of 276 conjuncts, 139 conjuncts are in the unsatisfiable core [2025-02-07 17:15:41,010 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-07 17:15:41,026 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2025-02-07 17:15:41,032 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2025-02-07 17:15:41,056 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2025-02-07 17:15:41,061 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2025-02-07 17:15:41,097 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-02-07 17:15:41,098 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 28 [2025-02-07 17:15:41,106 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-02-07 17:15:41,107 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 28 [2025-02-07 17:15:41,140 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-02-07 17:15:41,140 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 38 [2025-02-07 17:15:41,153 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-02-07 17:15:41,153 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 38 [2025-02-07 17:15:41,209 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-02-07 17:15:41,209 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 10 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 40 treesize of output 48 [2025-02-07 17:15:41,225 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-02-07 17:15:41,226 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 10 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 40 treesize of output 48 [2025-02-07 17:15:41,285 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-02-07 17:15:41,285 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 15 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 47 treesize of output 58 [2025-02-07 17:15:41,305 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-02-07 17:15:41,305 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 15 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 47 treesize of output 58 [2025-02-07 17:15:41,376 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-02-07 17:15:41,376 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 21 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 54 treesize of output 68 [2025-02-07 17:15:41,396 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-02-07 17:15:41,396 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 21 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 54 treesize of output 68 [2025-02-07 17:15:41,491 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-02-07 17:15:41,492 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 28 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 21 case distinctions, treesize of input 61 treesize of output 78 [2025-02-07 17:15:41,512 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-02-07 17:15:41,512 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 28 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 21 case distinctions, treesize of input 61 treesize of output 78 [2025-02-07 17:15:41,601 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-02-07 17:15:41,601 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 36 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 68 treesize of output 88 [2025-02-07 17:15:41,625 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-02-07 17:15:41,626 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 36 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 68 treesize of output 88 [2025-02-07 17:15:45,023 INFO L349 Elim1Store]: treesize reduction 576, result has 25.7 percent of original size [2025-02-07 17:15:45,024 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 19 select indices, 19 select index equivalence classes, 36 disjoint index pairs (out of 171 index pairs), introduced 19 new quantified variables, introduced 189 case distinctions, treesize of input 149 treesize of output 267 [2025-02-07 17:15:45,488 INFO L349 Elim1Store]: treesize reduction 540, result has 26.9 percent of original size [2025-02-07 17:15:45,488 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 19 select indices, 19 select index equivalence classes, 36 disjoint index pairs (out of 171 index pairs), introduced 19 new quantified variables, introduced 189 case distinctions, treesize of input 149 treesize of output 265