./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/array-crafted/zero_sum_const4.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 551b0097 Calling Ultimate with: /root/.sdkman/candidates/java/21.0.5-tem/bin/java -Dosgi.configuration.area=/storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.6.800.v20240513-1750.jar -data @noDefault -ultimatedata /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/array-crafted/zero_sum_const4.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 e61c61c9ffe0a2031cf5a0964b1882adcc5bdae1b7345aeaf1c374f155ad9e78 --- Real Ultimate output --- This is Ultimate 0.3.0-?-551b009-m [2025-01-08 22:26:09,682 INFO L188 SettingsManager]: Resetting all preferences to default values... [2025-01-08 22:26:09,732 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2025-01-08 22:26:09,737 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2025-01-08 22:26:09,737 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2025-01-08 22:26:09,760 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2025-01-08 22:26:09,761 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2025-01-08 22:26:09,761 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2025-01-08 22:26:09,762 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2025-01-08 22:26:09,762 INFO L153 SettingsManager]: * Use memory slicer=true [2025-01-08 22:26:09,762 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2025-01-08 22:26:09,762 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2025-01-08 22:26:09,763 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2025-01-08 22:26:09,763 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2025-01-08 22:26:09,763 INFO L153 SettingsManager]: * Use SBE=true [2025-01-08 22:26:09,763 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2025-01-08 22:26:09,763 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2025-01-08 22:26:09,763 INFO L153 SettingsManager]: * sizeof long=4 [2025-01-08 22:26:09,764 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2025-01-08 22:26:09,764 INFO L153 SettingsManager]: * sizeof POINTER=4 [2025-01-08 22:26:09,764 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2025-01-08 22:26:09,764 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2025-01-08 22:26:09,764 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2025-01-08 22:26:09,764 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2025-01-08 22:26:09,764 INFO L153 SettingsManager]: * sizeof long double=12 [2025-01-08 22:26:09,764 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2025-01-08 22:26:09,764 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2025-01-08 22:26:09,764 INFO L153 SettingsManager]: * Use constant arrays=true [2025-01-08 22:26:09,764 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2025-01-08 22:26:09,764 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2025-01-08 22:26:09,764 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2025-01-08 22:26:09,765 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2025-01-08 22:26:09,765 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-01-08 22:26:09,765 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2025-01-08 22:26:09,765 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2025-01-08 22:26:09,765 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2025-01-08 22:26:09,765 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2025-01-08 22:26:09,765 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-01-08 22:26:09,766 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2025-01-08 22:26:09,766 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2025-01-08 22:26:09,766 INFO L153 SettingsManager]: * Compute procedure contracts=false [2025-01-08 22:26:09,766 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2025-01-08 22:26:09,766 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2025-01-08 22:26:09,766 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2025-01-08 22:26:09,766 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2025-01-08 22:26:09,766 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2025-01-08 22:26:09,766 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2025-01-08 22:26:09,766 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2025-01-08 22:26:09,766 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 -> e61c61c9ffe0a2031cf5a0964b1882adcc5bdae1b7345aeaf1c374f155ad9e78 [2025-01-08 22:26:09,989 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2025-01-08 22:26:09,996 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2025-01-08 22:26:09,997 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2025-01-08 22:26:09,998 INFO L270 PluginConnector]: Initializing CDTParser... [2025-01-08 22:26:09,998 INFO L274 PluginConnector]: CDTParser initialized [2025-01-08 22:26:09,999 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-crafted/zero_sum_const4.c [2025-01-08 22:26:11,095 INFO L533 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/9c018748b/79938ce782d743b5930818897658ca25/FLAG36811f913 [2025-01-08 22:26:11,351 INFO L384 CDTParser]: Found 1 translation units. [2025-01-08 22:26:11,351 INFO L180 CDTParser]: Scanning /storage/repos/ultimate-jdk21/releaseScripts/default/sv-benchmarks/c/array-crafted/zero_sum_const4.c [2025-01-08 22:26:11,359 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/9c018748b/79938ce782d743b5930818897658ca25/FLAG36811f913 [2025-01-08 22:26:11,682 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/9c018748b/79938ce782d743b5930818897658ca25 [2025-01-08 22:26:11,685 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2025-01-08 22:26:11,687 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2025-01-08 22:26:11,688 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2025-01-08 22:26:11,688 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2025-01-08 22:26:11,694 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2025-01-08 22:26:11,695 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 08.01 10:26:11" (1/1) ... [2025-01-08 22:26:11,696 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1e5c9c1d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.01 10:26:11, skipping insertion in model container [2025-01-08 22:26:11,699 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 08.01 10:26:11" (1/1) ... [2025-01-08 22:26:11,715 INFO L175 MainTranslator]: Built tables and reachable declarations [2025-01-08 22:26:11,882 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-crafted/zero_sum_const4.c[406,419] [2025-01-08 22:26:11,915 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-01-08 22:26:11,931 INFO L200 MainTranslator]: Completed pre-run [2025-01-08 22:26:11,946 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-crafted/zero_sum_const4.c[406,419] [2025-01-08 22:26:11,953 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-01-08 22:26:11,966 INFO L204 MainTranslator]: Completed translation [2025-01-08 22:26:11,967 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.01 10:26:11 WrapperNode [2025-01-08 22:26:11,968 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2025-01-08 22:26:11,968 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2025-01-08 22:26:11,968 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2025-01-08 22:26:11,969 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2025-01-08 22:26:11,973 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.01 10:26:11" (1/1) ... [2025-01-08 22:26:11,981 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.01 10:26:11" (1/1) ... [2025-01-08 22:26:11,994 INFO L138 Inliner]: procedures = 16, calls = 18, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 100 [2025-01-08 22:26:11,994 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2025-01-08 22:26:11,995 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2025-01-08 22:26:11,995 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2025-01-08 22:26:11,996 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2025-01-08 22:26:12,001 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.01 10:26:11" (1/1) ... [2025-01-08 22:26:12,001 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.01 10:26:11" (1/1) ... [2025-01-08 22:26:12,003 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.01 10:26:11" (1/1) ... [2025-01-08 22:26:12,011 INFO L175 MemorySlicer]: Split 11 memory accesses to 2 slices as follows [2, 9]. 82 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0]. The 1 writes are split as follows [0, 1]. [2025-01-08 22:26:12,015 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.01 10:26:11" (1/1) ... [2025-01-08 22:26:12,015 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.01 10:26:11" (1/1) ... [2025-01-08 22:26:12,021 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.01 10:26:11" (1/1) ... [2025-01-08 22:26:12,022 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.01 10:26:11" (1/1) ... [2025-01-08 22:26:12,028 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.01 10:26:11" (1/1) ... [2025-01-08 22:26:12,028 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.01 10:26:11" (1/1) ... [2025-01-08 22:26:12,029 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.01 10:26:11" (1/1) ... [2025-01-08 22:26:12,030 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2025-01-08 22:26:12,030 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2025-01-08 22:26:12,032 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2025-01-08 22:26:12,032 INFO L274 PluginConnector]: RCFGBuilder initialized [2025-01-08 22:26:12,033 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.01 10:26:11" (1/1) ... [2025-01-08 22:26:12,036 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-01-08 22:26:12,045 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-08 22:26:12,055 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2025-01-08 22:26:12,061 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2025-01-08 22:26:12,074 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2025-01-08 22:26:12,075 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2025-01-08 22:26:12,075 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2025-01-08 22:26:12,075 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2025-01-08 22:26:12,075 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2025-01-08 22:26:12,075 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2025-01-08 22:26:12,075 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2025-01-08 22:26:12,075 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2025-01-08 22:26:12,075 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2025-01-08 22:26:12,075 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2025-01-08 22:26:12,130 INFO L234 CfgBuilder]: Building ICFG [2025-01-08 22:26:12,132 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2025-01-08 22:26:12,283 INFO L? ?]: Removed 7 outVars from TransFormulas that were not future-live. [2025-01-08 22:26:12,283 INFO L283 CfgBuilder]: Performing block encoding [2025-01-08 22:26:12,290 INFO L307 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2025-01-08 22:26:12,290 INFO L312 CfgBuilder]: Removed 0 assume(true) statements. [2025-01-08 22:26:12,290 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 08.01 10:26:12 BoogieIcfgContainer [2025-01-08 22:26:12,290 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2025-01-08 22:26:12,293 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2025-01-08 22:26:12,293 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2025-01-08 22:26:12,296 INFO L274 PluginConnector]: TraceAbstraction initialized [2025-01-08 22:26:12,296 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 08.01 10:26:11" (1/3) ... [2025-01-08 22:26:12,298 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@379913ec and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 08.01 10:26:12, skipping insertion in model container [2025-01-08 22:26:12,298 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.01 10:26:11" (2/3) ... [2025-01-08 22:26:12,298 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@379913ec and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 08.01 10:26:12, skipping insertion in model container [2025-01-08 22:26:12,299 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 08.01 10:26:12" (3/3) ... [2025-01-08 22:26:12,299 INFO L128 eAbstractionObserver]: Analyzing ICFG zero_sum_const4.c [2025-01-08 22:26:12,309 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2025-01-08 22:26:12,311 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG zero_sum_const4.c that has 1 procedures, 20 locations, 1 initial locations, 9 loop locations, and 1 error locations. [2025-01-08 22:26:12,346 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2025-01-08 22:26:12,356 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;@13835c00, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2025-01-08 22:26:12,356 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2025-01-08 22:26:12,359 INFO L276 IsEmpty]: Start isEmpty. Operand has 20 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-08 22:26:12,362 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2025-01-08 22:26:12,363 INFO L210 NwaCegarLoop]: Found error trace [2025-01-08 22:26:12,363 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-01-08 22:26:12,363 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-01-08 22:26:12,367 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-08 22:26:12,367 INFO L85 PathProgramCache]: Analyzing trace with hash -1764357437, now seen corresponding path program 1 times [2025-01-08 22:26:12,372 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-08 22:26:12,372 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [914116621] [2025-01-08 22:26:12,373 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-08 22:26:12,373 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-08 22:26:12,418 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 14 statements into 1 equivalence classes. [2025-01-08 22:26:12,429 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 14 of 14 statements. [2025-01-08 22:26:12,429 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-08 22:26:12,429 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-08 22:26:12,530 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-01-08 22:26:12,531 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-08 22:26:12,531 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [914116621] [2025-01-08 22:26:12,532 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [914116621] provided 1 perfect and 0 imperfect interpolant sequences [2025-01-08 22:26:12,532 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-01-08 22:26:12,532 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2025-01-08 22:26:12,536 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [268821290] [2025-01-08 22:26:12,537 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-01-08 22:26:12,539 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2025-01-08 22:26:12,539 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-08 22:26:12,554 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2025-01-08 22:26:12,554 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-01-08 22:26:12,555 INFO L87 Difference]: Start difference. First operand has 20 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-08 22:26:12,612 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-01-08 22:26:12,612 INFO L93 Difference]: Finished difference Result 37 states and 56 transitions. [2025-01-08 22:26:12,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-01-08 22:26:12,614 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2025-01-08 22:26:12,614 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-01-08 22:26:12,618 INFO L225 Difference]: With dead ends: 37 [2025-01-08 22:26:12,618 INFO L226 Difference]: Without dead ends: 16 [2025-01-08 22:26:12,620 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 [2025-01-08 22:26:12,622 INFO L435 NwaCegarLoop]: 28 mSDtfsCounter, 0 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-01-08 22:26:12,622 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 33 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-01-08 22:26:12,631 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2025-01-08 22:26:12,637 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2025-01-08 22:26:12,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 15 states have (on average 1.6) internal successors, (24), 15 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-08 22:26:12,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 24 transitions. [2025-01-08 22:26:12,641 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 24 transitions. Word has length 14 [2025-01-08 22:26:12,641 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-01-08 22:26:12,641 INFO L471 AbstractCegarLoop]: Abstraction has 16 states and 24 transitions. [2025-01-08 22:26:12,642 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-08 22:26:12,642 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 24 transitions. [2025-01-08 22:26:12,642 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2025-01-08 22:26:12,642 INFO L210 NwaCegarLoop]: Found error trace [2025-01-08 22:26:12,642 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-01-08 22:26:12,643 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2025-01-08 22:26:12,643 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-01-08 22:26:12,643 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-08 22:26:12,643 INFO L85 PathProgramCache]: Analyzing trace with hash -862471522, now seen corresponding path program 1 times [2025-01-08 22:26:12,643 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-08 22:26:12,644 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [304540012] [2025-01-08 22:26:12,644 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-08 22:26:12,644 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-08 22:26:12,652 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 15 statements into 1 equivalence classes. [2025-01-08 22:26:12,658 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 15 of 15 statements. [2025-01-08 22:26:12,659 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-08 22:26:12,659 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-08 22:26:12,756 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-01-08 22:26:12,756 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-08 22:26:12,756 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [304540012] [2025-01-08 22:26:12,756 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [304540012] provided 1 perfect and 0 imperfect interpolant sequences [2025-01-08 22:26:12,756 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-01-08 22:26:12,756 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2025-01-08 22:26:12,756 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1949108098] [2025-01-08 22:26:12,756 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-01-08 22:26:12,757 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-01-08 22:26:12,757 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-08 22:26:12,757 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-01-08 22:26:12,757 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2025-01-08 22:26:12,757 INFO L87 Difference]: Start difference. First operand 16 states and 24 transitions. Second operand has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-08 22:26:12,812 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-01-08 22:26:12,815 INFO L93 Difference]: Finished difference Result 34 states and 56 transitions. [2025-01-08 22:26:12,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-01-08 22:26:12,815 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2025-01-08 22:26:12,815 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-01-08 22:26:12,816 INFO L225 Difference]: With dead ends: 34 [2025-01-08 22:26:12,816 INFO L226 Difference]: Without dead ends: 24 [2025-01-08 22:26:12,816 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2025-01-08 22:26:12,816 INFO L435 NwaCegarLoop]: 5 mSDtfsCounter, 26 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 7 SdHoareTripleChecker+Invalid, 45 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-01-08 22:26:12,817 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [26 Valid, 7 Invalid, 45 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-01-08 22:26:12,817 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2025-01-08 22:26:12,824 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2025-01-08 22:26:12,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 23 states have (on average 1.391304347826087) internal successors, (32), 23 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-08 22:26:12,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 32 transitions. [2025-01-08 22:26:12,829 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 32 transitions. Word has length 15 [2025-01-08 22:26:12,829 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-01-08 22:26:12,829 INFO L471 AbstractCegarLoop]: Abstraction has 24 states and 32 transitions. [2025-01-08 22:26:12,829 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-08 22:26:12,829 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 32 transitions. [2025-01-08 22:26:12,829 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2025-01-08 22:26:12,829 INFO L210 NwaCegarLoop]: Found error trace [2025-01-08 22:26:12,829 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-01-08 22:26:12,829 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2025-01-08 22:26:12,830 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-01-08 22:26:12,830 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-08 22:26:12,830 INFO L85 PathProgramCache]: Analyzing trace with hash 805414422, now seen corresponding path program 1 times [2025-01-08 22:26:12,830 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-08 22:26:12,830 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [931448707] [2025-01-08 22:26:12,830 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-08 22:26:12,830 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-08 22:26:12,847 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 23 statements into 1 equivalence classes. [2025-01-08 22:26:12,867 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 23 of 23 statements. [2025-01-08 22:26:12,868 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-08 22:26:12,868 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-08 22:26:12,996 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2025-01-08 22:26:12,997 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-08 22:26:12,997 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [931448707] [2025-01-08 22:26:12,999 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [931448707] provided 0 perfect and 1 imperfect interpolant sequences [2025-01-08 22:26:13,000 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [976426363] [2025-01-08 22:26:13,000 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-08 22:26:13,000 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-08 22:26:13,000 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-08 22:26:13,002 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-01-08 22:26:13,003 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2025-01-08 22:26:13,046 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 23 statements into 1 equivalence classes. [2025-01-08 22:26:13,066 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 23 of 23 statements. [2025-01-08 22:26:13,066 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-08 22:26:13,066 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-08 22:26:13,068 INFO L256 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 4 conjuncts are in the unsatisfiable core [2025-01-08 22:26:13,071 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-08 22:26:13,114 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2025-01-08 22:26:13,115 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-01-08 22:26:13,141 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2025-01-08 22:26:13,143 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [976426363] provided 0 perfect and 2 imperfect interpolant sequences [2025-01-08 22:26:13,143 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-01-08 22:26:13,143 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2025-01-08 22:26:13,143 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [227559269] [2025-01-08 22:26:13,143 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-01-08 22:26:13,144 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2025-01-08 22:26:13,145 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-08 22:26:13,145 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2025-01-08 22:26:13,145 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=22, Unknown=0, NotChecked=0, Total=42 [2025-01-08 22:26:13,146 INFO L87 Difference]: Start difference. First operand 24 states and 32 transitions. Second operand has 7 states, 7 states have (on average 4.0) internal successors, (28), 7 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-08 22:26:13,191 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-01-08 22:26:13,192 INFO L93 Difference]: Finished difference Result 44 states and 60 transitions. [2025-01-08 22:26:13,192 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-01-08 22:26:13,192 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.0) internal successors, (28), 7 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2025-01-08 22:26:13,192 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-01-08 22:26:13,193 INFO L225 Difference]: With dead ends: 44 [2025-01-08 22:26:13,193 INFO L226 Difference]: Without dead ends: 25 [2025-01-08 22:26:13,194 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 42 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=22, Unknown=0, NotChecked=0, Total=42 [2025-01-08 22:26:13,194 INFO L435 NwaCegarLoop]: 22 mSDtfsCounter, 0 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 61 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 61 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 61 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-01-08 22:26:13,195 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 28 Invalid, 61 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 61 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-01-08 22:26:13,196 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2025-01-08 22:26:13,200 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2025-01-08 22:26:13,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 24 states have (on average 1.375) internal successors, (33), 24 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-08 22:26:13,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 33 transitions. [2025-01-08 22:26:13,201 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 33 transitions. Word has length 23 [2025-01-08 22:26:13,202 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-01-08 22:26:13,202 INFO L471 AbstractCegarLoop]: Abstraction has 25 states and 33 transitions. [2025-01-08 22:26:13,202 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.0) internal successors, (28), 7 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-08 22:26:13,202 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 33 transitions. [2025-01-08 22:26:13,219 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2025-01-08 22:26:13,220 INFO L210 NwaCegarLoop]: Found error trace [2025-01-08 22:26:13,220 INFO L218 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-01-08 22:26:13,228 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2025-01-08 22:26:13,426 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-08 22:26:13,426 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-01-08 22:26:13,427 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-08 22:26:13,427 INFO L85 PathProgramCache]: Analyzing trace with hash 310942875, now seen corresponding path program 2 times [2025-01-08 22:26:13,428 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-08 22:26:13,428 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [113770821] [2025-01-08 22:26:13,428 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-01-08 22:26:13,428 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-08 22:26:13,438 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 24 statements into 2 equivalence classes. [2025-01-08 22:26:13,447 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 24 of 24 statements. [2025-01-08 22:26:13,447 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-01-08 22:26:13,447 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-08 22:26:13,516 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2025-01-08 22:26:13,516 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-08 22:26:13,516 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [113770821] [2025-01-08 22:26:13,516 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [113770821] provided 0 perfect and 1 imperfect interpolant sequences [2025-01-08 22:26:13,516 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2042294617] [2025-01-08 22:26:13,516 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-01-08 22:26:13,516 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-08 22:26:13,517 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-08 22:26:13,518 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-01-08 22:26:13,520 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2025-01-08 22:26:13,548 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 24 statements into 2 equivalence classes. [2025-01-08 22:26:13,563 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 24 of 24 statements. [2025-01-08 22:26:13,564 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-01-08 22:26:13,564 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-08 22:26:13,564 INFO L256 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 4 conjuncts are in the unsatisfiable core [2025-01-08 22:26:13,565 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-08 22:26:13,605 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2025-01-08 22:26:13,606 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-01-08 22:26:13,640 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2025-01-08 22:26:13,640 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2042294617] provided 0 perfect and 2 imperfect interpolant sequences [2025-01-08 22:26:13,641 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-01-08 22:26:13,641 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 8 [2025-01-08 22:26:13,641 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [400381503] [2025-01-08 22:26:13,641 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-01-08 22:26:13,641 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2025-01-08 22:26:13,641 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-08 22:26:13,641 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2025-01-08 22:26:13,641 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2025-01-08 22:26:13,642 INFO L87 Difference]: Start difference. First operand 25 states and 33 transitions. Second operand has 8 states, 8 states have (on average 3.5) internal successors, (28), 8 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-08 22:26:13,698 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-01-08 22:26:13,698 INFO L93 Difference]: Finished difference Result 50 states and 72 transitions. [2025-01-08 22:26:13,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-01-08 22:26:13,699 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.5) internal successors, (28), 8 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2025-01-08 22:26:13,699 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-01-08 22:26:13,699 INFO L225 Difference]: With dead ends: 50 [2025-01-08 22:26:13,699 INFO L226 Difference]: Without dead ends: 33 [2025-01-08 22:26:13,699 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 42 SyntacticMatches, 3 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2025-01-08 22:26:13,700 INFO L435 NwaCegarLoop]: 5 mSDtfsCounter, 9 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 65 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 11 SdHoareTripleChecker+Invalid, 96 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 65 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-01-08 22:26:13,700 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 11 Invalid, 96 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 65 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-01-08 22:26:13,701 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2025-01-08 22:26:13,703 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2025-01-08 22:26:13,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 32 states have (on average 1.28125) internal successors, (41), 32 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-08 22:26:13,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 41 transitions. [2025-01-08 22:26:13,704 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 41 transitions. Word has length 24 [2025-01-08 22:26:13,704 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-01-08 22:26:13,704 INFO L471 AbstractCegarLoop]: Abstraction has 33 states and 41 transitions. [2025-01-08 22:26:13,704 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.5) internal successors, (28), 8 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-08 22:26:13,704 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 41 transitions. [2025-01-08 22:26:13,704 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2025-01-08 22:26:13,704 INFO L210 NwaCegarLoop]: Found error trace [2025-01-08 22:26:13,704 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-01-08 22:26:13,710 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2025-01-08 22:26:13,909 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-08 22:26:13,909 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-01-08 22:26:13,910 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-08 22:26:13,910 INFO L85 PathProgramCache]: Analyzing trace with hash -206880221, now seen corresponding path program 3 times [2025-01-08 22:26:13,910 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-08 22:26:13,910 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1782747620] [2025-01-08 22:26:13,910 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-01-08 22:26:13,910 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-08 22:26:13,917 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 32 statements into 2 equivalence classes. [2025-01-08 22:26:13,934 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) and asserted 32 of 32 statements. [2025-01-08 22:26:13,934 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2025-01-08 22:26:13,934 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-08 22:26:15,615 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-01-08 22:26:15,616 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-08 22:26:15,616 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1782747620] [2025-01-08 22:26:15,616 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1782747620] provided 0 perfect and 1 imperfect interpolant sequences [2025-01-08 22:26:15,616 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [662338203] [2025-01-08 22:26:15,616 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-01-08 22:26:15,616 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-08 22:26:15,616 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-08 22:26:15,621 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-01-08 22:26:15,624 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2025-01-08 22:26:15,665 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 32 statements into 2 equivalence classes. [2025-01-08 22:26:15,688 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) and asserted 32 of 32 statements. [2025-01-08 22:26:15,689 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2025-01-08 22:26:15,689 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-08 22:26:15,690 INFO L256 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 80 conjuncts are in the unsatisfiable core [2025-01-08 22:26:15,697 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-08 22:26:15,745 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 [2025-01-08 22:26:16,016 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-01-08 22:26:16,016 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-01-08 22:26:16,197 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-01-08 22:26:16,197 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [662338203] provided 0 perfect and 2 imperfect interpolant sequences [2025-01-08 22:26:16,197 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-01-08 22:26:16,197 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 9] total 21 [2025-01-08 22:26:16,197 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [515148722] [2025-01-08 22:26:16,197 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-01-08 22:26:16,197 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2025-01-08 22:26:16,197 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-08 22:26:16,198 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2025-01-08 22:26:16,198 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=359, Unknown=0, NotChecked=0, Total=420 [2025-01-08 22:26:16,198 INFO L87 Difference]: Start difference. First operand 33 states and 41 transitions. Second operand has 21 states, 21 states have (on average 3.619047619047619) internal successors, (76), 21 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-08 22:26:16,381 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-01-08 22:26:16,381 INFO L93 Difference]: Finished difference Result 58 states and 73 transitions. [2025-01-08 22:26:16,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2025-01-08 22:26:16,382 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.619047619047619) internal successors, (76), 21 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2025-01-08 22:26:16,382 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-01-08 22:26:16,383 INFO L225 Difference]: With dead ends: 58 [2025-01-08 22:26:16,383 INFO L226 Difference]: Without dead ends: 55 [2025-01-08 22:26:16,383 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=61, Invalid=359, Unknown=0, NotChecked=0, Total=420 [2025-01-08 22:26:16,384 INFO L435 NwaCegarLoop]: 13 mSDtfsCounter, 0 mSDsluCounter, 60 mSDsCounter, 0 mSdLazyCounter, 334 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 73 SdHoareTripleChecker+Invalid, 336 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 334 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2025-01-08 22:26:16,384 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 73 Invalid, 336 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 334 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2025-01-08 22:26:16,385 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2025-01-08 22:26:16,390 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 53. [2025-01-08 22:26:16,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 52 states have (on average 1.3076923076923077) internal successors, (68), 52 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-08 22:26:16,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 68 transitions. [2025-01-08 22:26:16,391 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 68 transitions. Word has length 32 [2025-01-08 22:26:16,391 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-01-08 22:26:16,391 INFO L471 AbstractCegarLoop]: Abstraction has 53 states and 68 transitions. [2025-01-08 22:26:16,392 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 3.619047619047619) internal successors, (76), 21 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-08 22:26:16,392 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 68 transitions. [2025-01-08 22:26:16,392 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2025-01-08 22:26:16,392 INFO L210 NwaCegarLoop]: Found error trace [2025-01-08 22:26:16,392 INFO L218 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-01-08 22:26:16,398 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2025-01-08 22:26:16,593 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-08 22:26:16,593 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-01-08 22:26:16,594 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-08 22:26:16,595 INFO L85 PathProgramCache]: Analyzing trace with hash -1005717378, now seen corresponding path program 4 times [2025-01-08 22:26:16,595 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-08 22:26:16,595 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [756919585] [2025-01-08 22:26:16,595 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-01-08 22:26:16,595 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-08 22:26:16,604 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 33 statements into 2 equivalence classes. [2025-01-08 22:26:16,613 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) and asserted 30 of 33 statements. [2025-01-08 22:26:16,613 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) [2025-01-08 22:26:16,613 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-08 22:26:16,668 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2025-01-08 22:26:16,669 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-08 22:26:16,669 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [756919585] [2025-01-08 22:26:16,669 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [756919585] provided 0 perfect and 1 imperfect interpolant sequences [2025-01-08 22:26:16,669 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1382706113] [2025-01-08 22:26:16,669 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-01-08 22:26:16,669 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-08 22:26:16,669 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-08 22:26:16,674 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-01-08 22:26:16,675 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2025-01-08 22:26:16,710 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 33 statements into 2 equivalence classes. [2025-01-08 22:26:16,723 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) and asserted 30 of 33 statements. [2025-01-08 22:26:16,723 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) [2025-01-08 22:26:16,723 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-08 22:26:16,724 INFO L256 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 8 conjuncts are in the unsatisfiable core [2025-01-08 22:26:16,725 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-08 22:26:16,772 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2025-01-08 22:26:16,772 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-01-08 22:26:16,803 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2025-01-08 22:26:16,803 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1382706113] provided 0 perfect and 2 imperfect interpolant sequences [2025-01-08 22:26:16,803 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-01-08 22:26:16,804 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 11 [2025-01-08 22:26:16,804 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [286915466] [2025-01-08 22:26:16,804 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-01-08 22:26:16,805 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2025-01-08 22:26:16,805 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-08 22:26:16,805 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2025-01-08 22:26:16,805 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2025-01-08 22:26:16,805 INFO L87 Difference]: Start difference. First operand 53 states and 68 transitions. Second operand has 11 states, 11 states have (on average 2.727272727272727) internal successors, (30), 11 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-08 22:26:17,009 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-01-08 22:26:17,009 INFO L93 Difference]: Finished difference Result 109 states and 146 transitions. [2025-01-08 22:26:17,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2025-01-08 22:26:17,010 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), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2025-01-08 22:26:17,010 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-01-08 22:26:17,010 INFO L225 Difference]: With dead ends: 109 [2025-01-08 22:26:17,010 INFO L226 Difference]: Without dead ends: 60 [2025-01-08 22:26:17,013 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 58 SyntacticMatches, 5 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=58, Invalid=124, Unknown=0, NotChecked=0, Total=182 [2025-01-08 22:26:17,013 INFO L435 NwaCegarLoop]: 5 mSDtfsCounter, 0 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 160 mSolverCounterSat, 108 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 268 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 108 IncrementalHoareTripleChecker+Valid, 160 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2025-01-08 22:26:17,013 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 17 Invalid, 268 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [108 Valid, 160 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2025-01-08 22:26:17,013 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2025-01-08 22:26:17,022 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 59. [2025-01-08 22:26:17,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 58 states have (on average 1.2586206896551724) internal successors, (73), 58 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-08 22:26:17,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 73 transitions. [2025-01-08 22:26:17,023 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 73 transitions. Word has length 33 [2025-01-08 22:26:17,023 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-01-08 22:26:17,023 INFO L471 AbstractCegarLoop]: Abstraction has 59 states and 73 transitions. [2025-01-08 22:26:17,023 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), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-08 22:26:17,023 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 73 transitions. [2025-01-08 22:26:17,023 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2025-01-08 22:26:17,023 INFO L210 NwaCegarLoop]: Found error trace [2025-01-08 22:26:17,023 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-01-08 22:26:17,029 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2025-01-08 22:26:17,228 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,SelfDestructingSolverStorable5 [2025-01-08 22:26:17,228 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-01-08 22:26:17,228 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-08 22:26:17,228 INFO L85 PathProgramCache]: Analyzing trace with hash -582781115, now seen corresponding path program 5 times [2025-01-08 22:26:17,228 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-08 22:26:17,228 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [479751215] [2025-01-08 22:26:17,228 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-01-08 22:26:17,229 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-08 22:26:17,240 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 34 statements into 3 equivalence classes. [2025-01-08 22:26:17,250 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) and asserted 34 of 34 statements. [2025-01-08 22:26:17,251 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2025-01-08 22:26:17,251 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-08 22:26:17,325 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2025-01-08 22:26:17,325 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-08 22:26:17,325 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [479751215] [2025-01-08 22:26:17,325 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [479751215] provided 0 perfect and 1 imperfect interpolant sequences [2025-01-08 22:26:17,325 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [620063384] [2025-01-08 22:26:17,325 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-01-08 22:26:17,325 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-08 22:26:17,325 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-08 22:26:17,327 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-01-08 22:26:17,330 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2025-01-08 22:26:17,357 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 34 statements into 3 equivalence classes. [2025-01-08 22:26:17,390 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) and asserted 34 of 34 statements. [2025-01-08 22:26:17,390 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2025-01-08 22:26:17,390 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-08 22:26:17,391 INFO L256 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 8 conjuncts are in the unsatisfiable core [2025-01-08 22:26:17,392 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-08 22:26:17,433 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2025-01-08 22:26:17,433 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-01-08 22:26:17,476 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2025-01-08 22:26:17,476 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [620063384] provided 0 perfect and 2 imperfect interpolant sequences [2025-01-08 22:26:17,476 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-01-08 22:26:17,476 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 12 [2025-01-08 22:26:17,476 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [251407953] [2025-01-08 22:26:17,476 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-01-08 22:26:17,477 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2025-01-08 22:26:17,477 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-08 22:26:17,477 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2025-01-08 22:26:17,477 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2025-01-08 22:26:17,477 INFO L87 Difference]: Start difference. First operand 59 states and 73 transitions. Second operand has 12 states, 12 states have (on average 2.5) internal successors, (30), 12 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-08 22:26:17,616 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-01-08 22:26:17,616 INFO L93 Difference]: Finished difference Result 63 states and 77 transitions. [2025-01-08 22:26:17,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2025-01-08 22:26:17,616 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.5) internal successors, (30), 12 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2025-01-08 22:26:17,616 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-01-08 22:26:17,617 INFO L225 Difference]: With dead ends: 63 [2025-01-08 22:26:17,617 INFO L226 Difference]: Without dead ends: 42 [2025-01-08 22:26:17,617 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 58 SyntacticMatches, 7 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=87, Invalid=219, Unknown=0, NotChecked=0, Total=306 [2025-01-08 22:26:17,618 INFO L435 NwaCegarLoop]: 5 mSDtfsCounter, 23 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 153 mSolverCounterSat, 83 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 20 SdHoareTripleChecker+Invalid, 236 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 83 IncrementalHoareTripleChecker+Valid, 153 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-01-08 22:26:17,618 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [23 Valid, 20 Invalid, 236 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [83 Valid, 153 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-01-08 22:26:17,618 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2025-01-08 22:26:17,621 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2025-01-08 22:26:17,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 41 states have (on average 1.2195121951219512) internal successors, (50), 41 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-08 22:26:17,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 50 transitions. [2025-01-08 22:26:17,622 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 50 transitions. Word has length 34 [2025-01-08 22:26:17,622 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-01-08 22:26:17,622 INFO L471 AbstractCegarLoop]: Abstraction has 42 states and 50 transitions. [2025-01-08 22:26:17,622 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.5) internal successors, (30), 12 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-08 22:26:17,622 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 50 transitions. [2025-01-08 22:26:17,622 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2025-01-08 22:26:17,623 INFO L210 NwaCegarLoop]: Found error trace [2025-01-08 22:26:17,623 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-01-08 22:26:17,628 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2025-01-08 22:26:17,827 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-08 22:26:17,827 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-01-08 22:26:17,828 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-08 22:26:17,828 INFO L85 PathProgramCache]: Analyzing trace with hash -1982577482, now seen corresponding path program 6 times [2025-01-08 22:26:17,828 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-08 22:26:17,828 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1840710454] [2025-01-08 22:26:17,828 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-01-08 22:26:17,828 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-08 22:26:17,836 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 41 statements into 3 equivalence classes. [2025-01-08 22:26:17,890 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) and asserted 41 of 41 statements. [2025-01-08 22:26:17,890 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2025-01-08 22:26:17,891 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-08 22:26:20,514 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-01-08 22:26:20,515 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-08 22:26:20,515 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1840710454] [2025-01-08 22:26:20,515 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1840710454] provided 0 perfect and 1 imperfect interpolant sequences [2025-01-08 22:26:20,515 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1829971019] [2025-01-08 22:26:20,515 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-01-08 22:26:20,515 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-08 22:26:20,515 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-08 22:26:20,517 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-01-08 22:26:20,521 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2025-01-08 22:26:20,552 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 41 statements into 3 equivalence classes. [2025-01-08 22:26:20,576 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) and asserted 41 of 41 statements. [2025-01-08 22:26:20,576 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2025-01-08 22:26:20,577 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-08 22:26:20,578 WARN L254 TraceCheckSpWp]: Trace formula consists of 218 conjuncts, 118 conjuncts are in the unsatisfiable core [2025-01-08 22:26:20,581 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-08 22:26:20,645 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 [2025-01-08 22:26:21,440 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-01-08 22:26:21,440 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-01-08 22:26:22,160 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 43 treesize of output 37 [2025-01-08 22:26:22,173 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-01-08 22:26:22,173 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 97 treesize of output 69 [2025-01-08 22:26:22,312 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-01-08 22:26:22,313 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1829971019] provided 0 perfect and 2 imperfect interpolant sequences [2025-01-08 22:26:22,313 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-01-08 22:26:22,313 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 22, 23] total 71 [2025-01-08 22:26:22,313 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [550750974] [2025-01-08 22:26:22,314 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-01-08 22:26:22,314 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 71 states [2025-01-08 22:26:22,314 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-08 22:26:22,315 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2025-01-08 22:26:22,318 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=418, Invalid=4552, Unknown=0, NotChecked=0, Total=4970 [2025-01-08 22:26:22,318 INFO L87 Difference]: Start difference. First operand 42 states and 50 transitions. Second operand has 71 states, 71 states have (on average 1.619718309859155) internal successors, (115), 71 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-08 22:26:23,550 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-01-08 22:26:23,551 INFO L93 Difference]: Finished difference Result 108 states and 132 transitions. [2025-01-08 22:26:23,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2025-01-08 22:26:23,551 INFO L78 Accepts]: Start accepts. Automaton has has 71 states, 71 states have (on average 1.619718309859155) internal successors, (115), 71 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2025-01-08 22:26:23,552 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-01-08 22:26:23,552 INFO L225 Difference]: With dead ends: 108 [2025-01-08 22:26:23,552 INFO L226 Difference]: Without dead ends: 43 [2025-01-08 22:26:23,553 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2247 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=544, Invalid=5618, Unknown=0, NotChecked=0, Total=6162 [2025-01-08 22:26:23,553 INFO L435 NwaCegarLoop]: 5 mSDtfsCounter, 5 mSDsluCounter, 90 mSDsCounter, 0 mSdLazyCounter, 1675 mSolverCounterSat, 135 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 95 SdHoareTripleChecker+Invalid, 1810 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 135 IncrementalHoareTripleChecker+Valid, 1675 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2025-01-08 22:26:23,554 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 95 Invalid, 1810 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [135 Valid, 1675 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2025-01-08 22:26:23,554 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2025-01-08 22:26:23,557 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2025-01-08 22:26:23,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 42 states have (on average 1.2142857142857142) internal successors, (51), 42 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-08 22:26:23,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 51 transitions. [2025-01-08 22:26:23,557 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 51 transitions. Word has length 41 [2025-01-08 22:26:23,557 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-01-08 22:26:23,557 INFO L471 AbstractCegarLoop]: Abstraction has 43 states and 51 transitions. [2025-01-08 22:26:23,557 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 71 states, 71 states have (on average 1.619718309859155) internal successors, (115), 71 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-08 22:26:23,558 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 51 transitions. [2025-01-08 22:26:23,558 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2025-01-08 22:26:23,558 INFO L210 NwaCegarLoop]: Found error trace [2025-01-08 22:26:23,558 INFO L218 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-01-08 22:26:23,564 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2025-01-08 22:26:23,763 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2025-01-08 22:26:23,763 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-01-08 22:26:23,764 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-08 22:26:23,764 INFO L85 PathProgramCache]: Analyzing trace with hash -1437694981, now seen corresponding path program 7 times [2025-01-08 22:26:23,764 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-08 22:26:23,764 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1232275065] [2025-01-08 22:26:23,764 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-01-08 22:26:23,764 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-08 22:26:23,769 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 42 statements into 1 equivalence classes. [2025-01-08 22:26:23,775 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 42 of 42 statements. [2025-01-08 22:26:23,775 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-08 22:26:23,775 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-08 22:26:23,861 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 3 proven. 13 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2025-01-08 22:26:23,862 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-08 22:26:23,862 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1232275065] [2025-01-08 22:26:23,862 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1232275065] provided 0 perfect and 1 imperfect interpolant sequences [2025-01-08 22:26:23,862 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1955955309] [2025-01-08 22:26:23,862 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-01-08 22:26:23,862 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-08 22:26:23,862 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-08 22:26:23,864 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-01-08 22:26:23,867 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2025-01-08 22:26:23,898 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 42 statements into 1 equivalence classes. [2025-01-08 22:26:23,918 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 42 of 42 statements. [2025-01-08 22:26:23,918 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-08 22:26:23,918 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-08 22:26:23,919 INFO L256 TraceCheckSpWp]: Trace formula consists of 225 conjuncts, 10 conjuncts are in the unsatisfiable core [2025-01-08 22:26:23,920 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-08 22:26:23,971 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2025-01-08 22:26:23,971 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-01-08 22:26:24,021 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2025-01-08 22:26:24,021 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1955955309] provided 0 perfect and 2 imperfect interpolant sequences [2025-01-08 22:26:24,021 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-01-08 22:26:24,021 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 17 [2025-01-08 22:26:24,022 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1859682858] [2025-01-08 22:26:24,023 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-01-08 22:26:24,023 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2025-01-08 22:26:24,023 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-08 22:26:24,023 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2025-01-08 22:26:24,023 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=197, Unknown=0, NotChecked=0, Total=272 [2025-01-08 22:26:24,024 INFO L87 Difference]: Start difference. First operand 43 states and 51 transitions. Second operand has 17 states, 17 states have (on average 2.176470588235294) internal successors, (37), 17 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-08 22:26:24,224 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-01-08 22:26:24,224 INFO L93 Difference]: Finished difference Result 82 states and 104 transitions. [2025-01-08 22:26:24,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2025-01-08 22:26:24,224 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.176470588235294) internal successors, (37), 17 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2025-01-08 22:26:24,224 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-01-08 22:26:24,225 INFO L225 Difference]: With dead ends: 82 [2025-01-08 22:26:24,227 INFO L226 Difference]: Without dead ends: 51 [2025-01-08 22:26:24,227 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 70 SyntacticMatches, 8 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 182 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=128, Invalid=378, Unknown=0, NotChecked=0, Total=506 [2025-01-08 22:26:24,228 INFO L435 NwaCegarLoop]: 5 mSDtfsCounter, 19 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 269 mSolverCounterSat, 192 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 461 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 192 IncrementalHoareTripleChecker+Valid, 269 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2025-01-08 22:26:24,228 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 17 Invalid, 461 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [192 Valid, 269 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2025-01-08 22:26:24,228 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2025-01-08 22:26:24,233 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2025-01-08 22:26:24,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 50 states have (on average 1.18) internal successors, (59), 50 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-08 22:26:24,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 59 transitions. [2025-01-08 22:26:24,235 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 59 transitions. Word has length 42 [2025-01-08 22:26:24,235 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-01-08 22:26:24,235 INFO L471 AbstractCegarLoop]: Abstraction has 51 states and 59 transitions. [2025-01-08 22:26:24,235 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.176470588235294) internal successors, (37), 17 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-08 22:26:24,235 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 59 transitions. [2025-01-08 22:26:24,236 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2025-01-08 22:26:24,236 INFO L210 NwaCegarLoop]: Found error trace [2025-01-08 22:26:24,236 INFO L218 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-01-08 22:26:24,245 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2025-01-08 22:26:24,440 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-08 22:26:24,440 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-01-08 22:26:24,441 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-08 22:26:24,441 INFO L85 PathProgramCache]: Analyzing trace with hash 1647141251, now seen corresponding path program 8 times [2025-01-08 22:26:24,441 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-08 22:26:24,441 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [280192849] [2025-01-08 22:26:24,441 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-01-08 22:26:24,441 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-08 22:26:24,450 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 50 statements into 2 equivalence classes. [2025-01-08 22:26:24,474 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 50 of 50 statements. [2025-01-08 22:26:24,474 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-01-08 22:26:24,474 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-08 22:26:27,267 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-01-08 22:26:27,268 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-08 22:26:27,268 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [280192849] [2025-01-08 22:26:27,268 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [280192849] provided 0 perfect and 1 imperfect interpolant sequences [2025-01-08 22:26:27,268 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [689569989] [2025-01-08 22:26:27,268 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-01-08 22:26:27,268 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-08 22:26:27,268 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-08 22:26:27,270 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-01-08 22:26:27,271 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2025-01-08 22:26:27,317 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 50 statements into 2 equivalence classes. [2025-01-08 22:26:27,348 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 50 of 50 statements. [2025-01-08 22:26:27,348 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-01-08 22:26:27,348 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-08 22:26:27,351 WARN L254 TraceCheckSpWp]: Trace formula consists of 265 conjuncts, 145 conjuncts are in the unsatisfiable core [2025-01-08 22:26:27,355 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-08 22:26:27,376 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 [2025-01-08 22:26:27,655 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-01-08 22:26:27,655 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-01-08 22:26:28,040 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 80 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2025-01-08 22:26:28,040 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [689569989] provided 0 perfect and 2 imperfect interpolant sequences [2025-01-08 22:26:28,040 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-01-08 22:26:28,040 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 18, 13] total 48 [2025-01-08 22:26:28,040 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1606622644] [2025-01-08 22:26:28,041 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-01-08 22:26:28,041 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2025-01-08 22:26:28,041 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-08 22:26:28,041 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2025-01-08 22:26:28,042 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=220, Invalid=2036, Unknown=0, NotChecked=0, Total=2256 [2025-01-08 22:26:28,042 INFO L87 Difference]: Start difference. First operand 51 states and 59 transitions. Second operand has 48 states, 48 states have (on average 2.5833333333333335) internal successors, (124), 48 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-08 22:26:28,969 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-01-08 22:26:28,970 INFO L93 Difference]: Finished difference Result 90 states and 105 transitions. [2025-01-08 22:26:28,970 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2025-01-08 22:26:28,970 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 2.5833333333333335) internal successors, (124), 48 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 50 [2025-01-08 22:26:28,970 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-01-08 22:26:28,971 INFO L225 Difference]: With dead ends: 90 [2025-01-08 22:26:28,971 INFO L226 Difference]: Without dead ends: 87 [2025-01-08 22:26:28,971 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 98 SyntacticMatches, 2 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 924 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=330, Invalid=2862, Unknown=0, NotChecked=0, Total=3192 [2025-01-08 22:26:28,972 INFO L435 NwaCegarLoop]: 5 mSDtfsCounter, 4 mSDsluCounter, 93 mSDsCounter, 0 mSdLazyCounter, 1518 mSolverCounterSat, 82 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 98 SdHoareTripleChecker+Invalid, 1600 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 82 IncrementalHoareTripleChecker+Valid, 1518 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2025-01-08 22:26:28,972 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 98 Invalid, 1600 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [82 Valid, 1518 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2025-01-08 22:26:28,972 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2025-01-08 22:26:28,979 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 83. [2025-01-08 22:26:28,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 82 states have (on average 1.1951219512195121) internal successors, (98), 82 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-08 22:26:28,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 98 transitions. [2025-01-08 22:26:28,980 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 98 transitions. Word has length 50 [2025-01-08 22:26:28,980 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-01-08 22:26:28,980 INFO L471 AbstractCegarLoop]: Abstraction has 83 states and 98 transitions. [2025-01-08 22:26:28,980 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 2.5833333333333335) internal successors, (124), 48 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-08 22:26:28,980 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 98 transitions. [2025-01-08 22:26:28,984 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2025-01-08 22:26:28,984 INFO L210 NwaCegarLoop]: Found error trace [2025-01-08 22:26:28,984 INFO L218 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-01-08 22:26:28,993 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2025-01-08 22:26:29,184 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,9 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-08 22:26:29,185 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-01-08 22:26:29,185 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-08 22:26:29,185 INFO L85 PathProgramCache]: Analyzing trace with hash 1203793566, now seen corresponding path program 9 times [2025-01-08 22:26:29,185 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-08 22:26:29,188 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1936172503] [2025-01-08 22:26:29,188 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-01-08 22:26:29,189 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-08 22:26:29,194 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 51 statements into 4 equivalence classes. [2025-01-08 22:26:29,223 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) and asserted 51 of 51 statements. [2025-01-08 22:26:29,223 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2025-01-08 22:26:29,223 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-08 22:26:29,356 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 6 proven. 19 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2025-01-08 22:26:29,356 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-08 22:26:29,356 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1936172503] [2025-01-08 22:26:29,356 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1936172503] provided 0 perfect and 1 imperfect interpolant sequences [2025-01-08 22:26:29,356 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [306051841] [2025-01-08 22:26:29,356 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-01-08 22:26:29,356 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-08 22:26:29,356 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-08 22:26:29,358 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-01-08 22:26:29,359 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2025-01-08 22:26:29,395 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 51 statements into 4 equivalence classes. [2025-01-08 22:26:29,425 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) and asserted 51 of 51 statements. [2025-01-08 22:26:29,425 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2025-01-08 22:26:29,425 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-08 22:26:29,426 INFO L256 TraceCheckSpWp]: Trace formula consists of 270 conjuncts, 12 conjuncts are in the unsatisfiable core [2025-01-08 22:26:29,428 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-08 22:26:29,496 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 10 proven. 15 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2025-01-08 22:26:29,497 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-01-08 22:26:29,576 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 10 proven. 15 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2025-01-08 22:26:29,576 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [306051841] provided 0 perfect and 2 imperfect interpolant sequences [2025-01-08 22:26:29,576 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-01-08 22:26:29,576 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 20 [2025-01-08 22:26:29,576 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [158916103] [2025-01-08 22:26:29,576 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-01-08 22:26:29,576 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2025-01-08 22:26:29,576 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-08 22:26:29,577 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2025-01-08 22:26:29,577 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=279, Unknown=0, NotChecked=0, Total=380 [2025-01-08 22:26:29,577 INFO L87 Difference]: Start difference. First operand 83 states and 98 transitions. Second operand has 20 states, 20 states have (on average 2.3) internal successors, (46), 20 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-08 22:26:29,928 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-01-08 22:26:29,928 INFO L93 Difference]: Finished difference Result 165 states and 201 transitions. [2025-01-08 22:26:29,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2025-01-08 22:26:29,929 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.3) internal successors, (46), 20 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 51 [2025-01-08 22:26:29,929 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-01-08 22:26:29,929 INFO L225 Difference]: With dead ends: 165 [2025-01-08 22:26:29,930 INFO L226 Difference]: Without dead ends: 100 [2025-01-08 22:26:29,930 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 90 SyntacticMatches, 10 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 277 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=172, Invalid=530, Unknown=0, NotChecked=0, Total=702 [2025-01-08 22:26:29,931 INFO L435 NwaCegarLoop]: 5 mSDtfsCounter, 3 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 751 mSolverCounterSat, 137 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 888 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 137 IncrementalHoareTripleChecker+Valid, 751 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2025-01-08 22:26:29,931 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 24 Invalid, 888 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [137 Valid, 751 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2025-01-08 22:26:29,931 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2025-01-08 22:26:29,944 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 90. [2025-01-08 22:26:29,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 89 states have (on average 1.1797752808988764) internal successors, (105), 89 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-08 22:26:29,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 105 transitions. [2025-01-08 22:26:29,946 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 105 transitions. Word has length 51 [2025-01-08 22:26:29,946 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-01-08 22:26:29,946 INFO L471 AbstractCegarLoop]: Abstraction has 90 states and 105 transitions. [2025-01-08 22:26:29,946 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.3) internal successors, (46), 20 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-08 22:26:29,946 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 105 transitions. [2025-01-08 22:26:29,947 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2025-01-08 22:26:29,947 INFO L210 NwaCegarLoop]: Found error trace [2025-01-08 22:26:29,947 INFO L218 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-01-08 22:26:29,954 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2025-01-08 22:26:30,147 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-08 22:26:30,147 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-01-08 22:26:30,148 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-08 22:26:30,148 INFO L85 PathProgramCache]: Analyzing trace with hash -478291234, now seen corresponding path program 10 times [2025-01-08 22:26:30,148 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-08 22:26:30,148 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [586847775] [2025-01-08 22:26:30,148 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-01-08 22:26:30,148 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-08 22:26:30,157 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 51 statements into 2 equivalence classes. [2025-01-08 22:26:30,166 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) and asserted 48 of 51 statements. [2025-01-08 22:26:30,166 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) [2025-01-08 22:26:30,166 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-08 22:26:30,261 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2025-01-08 22:26:30,261 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-08 22:26:30,261 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [586847775] [2025-01-08 22:26:30,261 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [586847775] provided 0 perfect and 1 imperfect interpolant sequences [2025-01-08 22:26:30,261 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1456857597] [2025-01-08 22:26:30,261 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-01-08 22:26:30,261 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-08 22:26:30,261 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-08 22:26:30,263 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-01-08 22:26:30,265 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2025-01-08 22:26:30,300 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 51 statements into 2 equivalence classes. [2025-01-08 22:26:30,335 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) and asserted 48 of 51 statements. [2025-01-08 22:26:30,335 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) [2025-01-08 22:26:30,335 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-08 22:26:30,336 INFO L256 TraceCheckSpWp]: Trace formula consists of 227 conjuncts, 12 conjuncts are in the unsatisfiable core [2025-01-08 22:26:30,337 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-08 22:26:30,443 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2025-01-08 22:26:30,443 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-01-08 22:26:30,535 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2025-01-08 22:26:30,535 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1456857597] provided 0 perfect and 2 imperfect interpolant sequences [2025-01-08 22:26:30,535 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-01-08 22:26:30,535 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 18 [2025-01-08 22:26:30,535 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2081103834] [2025-01-08 22:26:30,535 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-01-08 22:26:30,536 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2025-01-08 22:26:30,536 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-08 22:26:30,536 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2025-01-08 22:26:30,536 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=223, Unknown=0, NotChecked=0, Total=306 [2025-01-08 22:26:30,536 INFO L87 Difference]: Start difference. First operand 90 states and 105 transitions. Second operand has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-08 22:26:30,772 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-01-08 22:26:30,773 INFO L93 Difference]: Finished difference Result 146 states and 169 transitions. [2025-01-08 22:26:30,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2025-01-08 22:26:30,773 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 51 [2025-01-08 22:26:30,773 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-01-08 22:26:30,774 INFO L225 Difference]: With dead ends: 146 [2025-01-08 22:26:30,774 INFO L226 Difference]: Without dead ends: 60 [2025-01-08 22:26:30,774 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 87 SyntacticMatches, 10 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 155 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=143, Invalid=363, Unknown=0, NotChecked=0, Total=506 [2025-01-08 22:26:30,775 INFO L435 NwaCegarLoop]: 6 mSDtfsCounter, 0 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 282 mSolverCounterSat, 250 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 532 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 250 IncrementalHoareTripleChecker+Valid, 282 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2025-01-08 22:26:30,775 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 22 Invalid, 532 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [250 Valid, 282 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2025-01-08 22:26:30,775 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2025-01-08 22:26:30,779 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2025-01-08 22:26:30,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 59 states have (on average 1.152542372881356) internal successors, (68), 59 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-08 22:26:30,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 68 transitions. [2025-01-08 22:26:30,780 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 68 transitions. Word has length 51 [2025-01-08 22:26:30,780 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-01-08 22:26:30,780 INFO L471 AbstractCegarLoop]: Abstraction has 60 states and 68 transitions. [2025-01-08 22:26:30,780 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-08 22:26:30,780 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 68 transitions. [2025-01-08 22:26:30,781 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2025-01-08 22:26:30,781 INFO L210 NwaCegarLoop]: Found error trace [2025-01-08 22:26:30,781 INFO L218 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-01-08 22:26:30,786 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2025-01-08 22:26:30,981 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2025-01-08 22:26:30,981 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-01-08 22:26:30,982 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-08 22:26:30,982 INFO L85 PathProgramCache]: Analyzing trace with hash -567805098, now seen corresponding path program 11 times [2025-01-08 22:26:30,982 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-08 22:26:30,982 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1813527710] [2025-01-08 22:26:30,982 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-01-08 22:26:30,982 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-08 22:26:30,987 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 59 statements into 4 equivalence classes. [2025-01-08 22:26:31,045 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) and asserted 59 of 59 statements. [2025-01-08 22:26:31,046 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2025-01-08 22:26:31,046 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-08 22:26:34,976 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 0 proven. 135 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-01-08 22:26:34,976 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-08 22:26:34,976 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1813527710] [2025-01-08 22:26:34,979 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1813527710] provided 0 perfect and 1 imperfect interpolant sequences [2025-01-08 22:26:34,979 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [217254635] [2025-01-08 22:26:34,979 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-01-08 22:26:34,980 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-08 22:26:34,980 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-08 22:26:34,982 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-01-08 22:26:34,983 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2025-01-08 22:26:35,020 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 59 statements into 4 equivalence classes. [2025-01-08 22:26:35,089 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) and asserted 59 of 59 statements. [2025-01-08 22:26:35,090 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2025-01-08 22:26:35,090 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-08 22:26:35,093 WARN L254 TraceCheckSpWp]: Trace formula consists of 312 conjuncts, 185 conjuncts are in the unsatisfiable core [2025-01-08 22:26:35,095 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-08 22:26:35,118 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 [2025-01-08 22:26:35,129 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 [2025-01-08 22:26:35,145 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-01-08 22:26:35,145 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 [2025-01-08 22:26:35,165 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-01-08 22:26:35,165 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 [2025-01-08 22:26:35,756 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 0 proven. 135 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-01-08 22:26:35,756 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-01-08 22:26:36,399 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2025-01-08 22:26:36,399 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [217254635] provided 0 perfect and 2 imperfect interpolant sequences [2025-01-08 22:26:36,399 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-01-08 22:26:36,399 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 21, 15] total 54 [2025-01-08 22:26:36,399 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2131153251] [2025-01-08 22:26:36,400 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-01-08 22:26:36,400 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 54 states [2025-01-08 22:26:36,400 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-08 22:26:36,400 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2025-01-08 22:26:36,401 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=184, Invalid=2678, Unknown=0, NotChecked=0, Total=2862 [2025-01-08 22:26:36,401 INFO L87 Difference]: Start difference. First operand 60 states and 68 transitions. Second operand has 54 states, 54 states have (on average 2.5) internal successors, (135), 54 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-08 22:26:37,360 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-01-08 22:26:37,360 INFO L93 Difference]: Finished difference Result 106 states and 121 transitions. [2025-01-08 22:26:37,360 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2025-01-08 22:26:37,361 INFO L78 Accepts]: Start accepts. Automaton has has 54 states, 54 states have (on average 2.5) internal successors, (135), 54 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2025-01-08 22:26:37,362 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-01-08 22:26:37,363 INFO L225 Difference]: With dead ends: 106 [2025-01-08 22:26:37,363 INFO L226 Difference]: Without dead ends: 103 [2025-01-08 22:26:37,364 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 120 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 705 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=184, Invalid=2678, Unknown=0, NotChecked=0, Total=2862 [2025-01-08 22:26:37,365 INFO L435 NwaCegarLoop]: 13 mSDtfsCounter, 0 mSDsluCounter, 144 mSDsCounter, 0 mSdLazyCounter, 2030 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 157 SdHoareTripleChecker+Invalid, 2034 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 2030 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2025-01-08 22:26:37,366 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 157 Invalid, 2034 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 2030 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2025-01-08 22:26:37,366 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2025-01-08 22:26:37,380 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 98. [2025-01-08 22:26:37,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98 states, 97 states have (on average 1.1649484536082475) internal successors, (113), 97 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-08 22:26:37,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 113 transitions. [2025-01-08 22:26:37,382 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 113 transitions. Word has length 59 [2025-01-08 22:26:37,382 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-01-08 22:26:37,382 INFO L471 AbstractCegarLoop]: Abstraction has 98 states and 113 transitions. [2025-01-08 22:26:37,382 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 54 states, 54 states have (on average 2.5) internal successors, (135), 54 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-08 22:26:37,382 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 113 transitions. [2025-01-08 22:26:37,382 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2025-01-08 22:26:37,383 INFO L210 NwaCegarLoop]: Found error trace [2025-01-08 22:26:37,383 INFO L218 NwaCegarLoop]: trace histogram [6, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-01-08 22:26:37,389 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2025-01-08 22:26:37,583 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2025-01-08 22:26:37,583 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-01-08 22:26:37,583 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-08 22:26:37,584 INFO L85 PathProgramCache]: Analyzing trace with hash 946644063, now seen corresponding path program 12 times [2025-01-08 22:26:37,584 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-08 22:26:37,584 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [497512524] [2025-01-08 22:26:37,584 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-01-08 22:26:37,584 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-08 22:26:37,593 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 60 statements into 4 equivalence classes. [2025-01-08 22:26:37,606 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) and asserted 60 of 60 statements. [2025-01-08 22:26:37,606 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2025-01-08 22:26:37,606 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-08 22:26:37,755 INFO L134 CoverageAnalysis]: Checked inductivity of 141 backedges. 10 proven. 26 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2025-01-08 22:26:37,755 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-08 22:26:37,756 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [497512524] [2025-01-08 22:26:37,756 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [497512524] provided 0 perfect and 1 imperfect interpolant sequences [2025-01-08 22:26:37,756 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2133319261] [2025-01-08 22:26:37,756 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-01-08 22:26:37,756 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-08 22:26:37,756 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-08 22:26:37,758 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-01-08 22:26:37,759 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2025-01-08 22:26:37,820 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 60 statements into 4 equivalence classes. [2025-01-08 22:26:37,857 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) and asserted 60 of 60 statements. [2025-01-08 22:26:37,857 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2025-01-08 22:26:37,857 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-08 22:26:37,858 INFO L256 TraceCheckSpWp]: Trace formula consists of 317 conjuncts, 14 conjuncts are in the unsatisfiable core [2025-01-08 22:26:37,859 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-08 22:26:37,948 INFO L134 CoverageAnalysis]: Checked inductivity of 141 backedges. 15 proven. 21 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2025-01-08 22:26:37,948 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-01-08 22:26:38,061 INFO L134 CoverageAnalysis]: Checked inductivity of 141 backedges. 15 proven. 21 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2025-01-08 22:26:38,061 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2133319261] provided 0 perfect and 2 imperfect interpolant sequences [2025-01-08 22:26:38,061 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-01-08 22:26:38,061 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 23 [2025-01-08 22:26:38,061 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1303207265] [2025-01-08 22:26:38,062 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-01-08 22:26:38,062 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2025-01-08 22:26:38,062 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-08 22:26:38,062 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2025-01-08 22:26:38,062 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=375, Unknown=0, NotChecked=0, Total=506 [2025-01-08 22:26:38,063 INFO L87 Difference]: Start difference. First operand 98 states and 113 transitions. Second operand has 23 states, 23 states have (on average 1.8695652173913044) internal successors, (43), 23 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-08 22:26:38,471 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-01-08 22:26:38,471 INFO L93 Difference]: Finished difference Result 194 states and 230 transitions. [2025-01-08 22:26:38,472 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2025-01-08 22:26:38,472 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.8695652173913044) internal successors, (43), 23 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 60 [2025-01-08 22:26:38,472 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-01-08 22:26:38,473 INFO L225 Difference]: With dead ends: 194 [2025-01-08 22:26:38,474 INFO L226 Difference]: Without dead ends: 117 [2025-01-08 22:26:38,474 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 106 SyntacticMatches, 12 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 390 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=223, Invalid=707, Unknown=0, NotChecked=0, Total=930 [2025-01-08 22:26:38,475 INFO L435 NwaCegarLoop]: 5 mSDtfsCounter, 3 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 779 mSolverCounterSat, 208 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 20 SdHoareTripleChecker+Invalid, 987 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 208 IncrementalHoareTripleChecker+Valid, 779 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2025-01-08 22:26:38,475 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 20 Invalid, 987 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [208 Valid, 779 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2025-01-08 22:26:38,475 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2025-01-08 22:26:38,489 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 105. [2025-01-08 22:26:38,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 104 states have (on average 1.1538461538461537) internal successors, (120), 104 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-08 22:26:38,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 120 transitions. [2025-01-08 22:26:38,493 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 120 transitions. Word has length 60 [2025-01-08 22:26:38,493 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-01-08 22:26:38,493 INFO L471 AbstractCegarLoop]: Abstraction has 105 states and 120 transitions. [2025-01-08 22:26:38,493 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.8695652173913044) internal successors, (43), 23 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-08 22:26:38,493 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 120 transitions. [2025-01-08 22:26:38,493 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2025-01-08 22:26:38,493 INFO L210 NwaCegarLoop]: Found error trace [2025-01-08 22:26:38,493 INFO L218 NwaCegarLoop]: trace histogram [6, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-01-08 22:26:38,500 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2025-01-08 22:26:38,694 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,13 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-08 22:26:38,694 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-01-08 22:26:38,694 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-08 22:26:38,694 INFO L85 PathProgramCache]: Analyzing trace with hash -422151317, now seen corresponding path program 13 times [2025-01-08 22:26:38,694 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-08 22:26:38,694 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [760196337] [2025-01-08 22:26:38,694 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-01-08 22:26:38,694 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-08 22:26:38,701 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 60 statements into 1 equivalence classes. [2025-01-08 22:26:38,707 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 60 of 60 statements. [2025-01-08 22:26:38,707 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-08 22:26:38,707 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-08 22:26:38,842 INFO L134 CoverageAnalysis]: Checked inductivity of 141 backedges. 16 proven. 20 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2025-01-08 22:26:38,842 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-08 22:26:38,842 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [760196337] [2025-01-08 22:26:38,842 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [760196337] provided 0 perfect and 1 imperfect interpolant sequences [2025-01-08 22:26:38,842 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [552391263] [2025-01-08 22:26:38,842 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-01-08 22:26:38,842 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-08 22:26:38,842 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-08 22:26:38,844 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-01-08 22:26:38,846 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2025-01-08 22:26:38,884 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 60 statements into 1 equivalence classes. [2025-01-08 22:26:38,910 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 60 of 60 statements. [2025-01-08 22:26:38,911 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-08 22:26:38,911 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-08 22:26:38,912 INFO L256 TraceCheckSpWp]: Trace formula consists of 317 conjuncts, 14 conjuncts are in the unsatisfiable core [2025-01-08 22:26:38,913 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-08 22:26:39,025 INFO L134 CoverageAnalysis]: Checked inductivity of 141 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2025-01-08 22:26:39,026 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-01-08 22:26:39,120 INFO L134 CoverageAnalysis]: Checked inductivity of 141 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2025-01-08 22:26:39,121 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [552391263] provided 0 perfect and 2 imperfect interpolant sequences [2025-01-08 22:26:39,121 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-01-08 22:26:39,121 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 23 [2025-01-08 22:26:39,121 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [857255088] [2025-01-08 22:26:39,121 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-01-08 22:26:39,121 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2025-01-08 22:26:39,122 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-08 22:26:39,122 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2025-01-08 22:26:39,122 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=375, Unknown=0, NotChecked=0, Total=506 [2025-01-08 22:26:39,122 INFO L87 Difference]: Start difference. First operand 105 states and 120 transitions. Second operand has 23 states, 23 states have (on average 1.8695652173913044) internal successors, (43), 23 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-08 22:26:39,366 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-01-08 22:26:39,366 INFO L93 Difference]: Finished difference Result 170 states and 193 transitions. [2025-01-08 22:26:39,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2025-01-08 22:26:39,366 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.8695652173913044) internal successors, (43), 23 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 60 [2025-01-08 22:26:39,367 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-01-08 22:26:39,367 INFO L225 Difference]: With dead ends: 170 [2025-01-08 22:26:39,367 INFO L226 Difference]: Without dead ends: 69 [2025-01-08 22:26:39,368 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 101 SyntacticMatches, 11 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 333 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=201, Invalid=555, Unknown=0, NotChecked=0, Total=756 [2025-01-08 22:26:39,368 INFO L435 NwaCegarLoop]: 6 mSDtfsCounter, 0 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 328 mSolverCounterSat, 308 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 20 SdHoareTripleChecker+Invalid, 636 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 308 IncrementalHoareTripleChecker+Valid, 328 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2025-01-08 22:26:39,368 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 20 Invalid, 636 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [308 Valid, 328 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2025-01-08 22:26:39,368 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2025-01-08 22:26:39,376 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 69. [2025-01-08 22:26:39,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 68 states have (on average 1.1323529411764706) internal successors, (77), 68 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-08 22:26:39,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 77 transitions. [2025-01-08 22:26:39,377 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 77 transitions. Word has length 60 [2025-01-08 22:26:39,377 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-01-08 22:26:39,377 INFO L471 AbstractCegarLoop]: Abstraction has 69 states and 77 transitions. [2025-01-08 22:26:39,377 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.8695652173913044) internal successors, (43), 23 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-08 22:26:39,377 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 77 transitions. [2025-01-08 22:26:39,377 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2025-01-08 22:26:39,377 INFO L210 NwaCegarLoop]: Found error trace [2025-01-08 22:26:39,377 INFO L218 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-01-08 22:26:39,383 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2025-01-08 22:26:39,578 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,14 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-08 22:26:39,578 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-01-08 22:26:39,579 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-08 22:26:39,579 INFO L85 PathProgramCache]: Analyzing trace with hash -6133533, now seen corresponding path program 14 times [2025-01-08 22:26:39,579 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-08 22:26:39,579 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2074657676] [2025-01-08 22:26:39,579 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-01-08 22:26:39,579 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-08 22:26:39,588 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 68 statements into 2 equivalence classes. [2025-01-08 22:26:39,611 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 68 of 68 statements. [2025-01-08 22:26:39,611 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-01-08 22:26:39,611 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-08 22:26:44,444 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 0 proven. 189 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-01-08 22:26:44,445 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-08 22:26:44,445 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2074657676] [2025-01-08 22:26:44,445 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2074657676] provided 0 perfect and 1 imperfect interpolant sequences [2025-01-08 22:26:44,445 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [170910855] [2025-01-08 22:26:44,445 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-01-08 22:26:44,445 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-08 22:26:44,445 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-08 22:26:44,450 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-01-08 22:26:44,451 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2025-01-08 22:26:44,496 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 68 statements into 2 equivalence classes. [2025-01-08 22:26:44,535 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 68 of 68 statements. [2025-01-08 22:26:44,535 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-01-08 22:26:44,536 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-08 22:26:44,539 WARN L254 TraceCheckSpWp]: Trace formula consists of 359 conjuncts, 216 conjuncts are in the unsatisfiable core [2025-01-08 22:26:44,542 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-08 22:26:44,568 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 [2025-01-08 22:26:44,988 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 0 proven. 189 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-01-08 22:26:44,988 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-01-08 22:26:45,671 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 0 proven. 168 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2025-01-08 22:26:45,671 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [170910855] provided 0 perfect and 2 imperfect interpolant sequences [2025-01-08 22:26:45,671 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-01-08 22:26:45,671 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [58, 24, 17] total 74 [2025-01-08 22:26:45,671 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1630886712] [2025-01-08 22:26:45,671 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-01-08 22:26:45,672 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 74 states [2025-01-08 22:26:45,672 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-08 22:26:45,673 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2025-01-08 22:26:45,674 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=371, Invalid=5031, Unknown=0, NotChecked=0, Total=5402 [2025-01-08 22:26:45,674 INFO L87 Difference]: Start difference. First operand 69 states and 77 transitions. Second operand has 74 states, 74 states have (on average 2.2972972972972974) internal successors, (170), 74 states have internal predecessors, (170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-08 22:26:48,679 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-01-08 22:26:48,679 INFO L93 Difference]: Finished difference Result 233 states and 292 transitions. [2025-01-08 22:26:48,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2025-01-08 22:26:48,679 INFO L78 Accepts]: Start accepts. Automaton has has 74 states, 74 states have (on average 2.2972972972972974) internal successors, (170), 74 states have internal predecessors, (170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 68 [2025-01-08 22:26:48,679 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-01-08 22:26:48,681 INFO L225 Difference]: With dead ends: 233 [2025-01-08 22:26:48,681 INFO L226 Difference]: Without dead ends: 180 [2025-01-08 22:26:48,683 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 228 GetRequests, 128 SyntacticMatches, 0 SemanticMatches, 100 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2706 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=921, Invalid=9381, Unknown=0, NotChecked=0, Total=10302 [2025-01-08 22:26:48,683 INFO L435 NwaCegarLoop]: 5 mSDtfsCounter, 0 mSDsluCounter, 144 mSDsCounter, 0 mSdLazyCounter, 3332 mSolverCounterSat, 797 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 149 SdHoareTripleChecker+Invalid, 4129 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 797 IncrementalHoareTripleChecker+Valid, 3332 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2025-01-08 22:26:48,683 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 149 Invalid, 4129 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [797 Valid, 3332 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2025-01-08 22:26:48,684 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180 states. [2025-01-08 22:26:48,707 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180 to 170. [2025-01-08 22:26:48,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 170 states, 169 states have (on average 1.2248520710059172) internal successors, (207), 169 states have internal predecessors, (207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-08 22:26:48,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170 states to 170 states and 207 transitions. [2025-01-08 22:26:48,708 INFO L78 Accepts]: Start accepts. Automaton has 170 states and 207 transitions. Word has length 68 [2025-01-08 22:26:48,708 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-01-08 22:26:48,708 INFO L471 AbstractCegarLoop]: Abstraction has 170 states and 207 transitions. [2025-01-08 22:26:48,708 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 74 states, 74 states have (on average 2.2972972972972974) internal successors, (170), 74 states have internal predecessors, (170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-08 22:26:48,709 INFO L276 IsEmpty]: Start isEmpty. Operand 170 states and 207 transitions. [2025-01-08 22:26:48,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2025-01-08 22:26:48,709 INFO L210 NwaCegarLoop]: Found error trace [2025-01-08 22:26:48,709 INFO L218 NwaCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-01-08 22:26:48,715 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2025-01-08 22:26:48,913 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,SelfDestructingSolverStorable15 [2025-01-08 22:26:48,913 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-01-08 22:26:48,913 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-08 22:26:48,913 INFO L85 PathProgramCache]: Analyzing trace with hash -601037307, now seen corresponding path program 15 times [2025-01-08 22:26:48,913 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-08 22:26:48,913 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1812874780] [2025-01-08 22:26:48,913 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-01-08 22:26:48,913 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-08 22:26:48,923 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 70 statements into 5 equivalence classes. [2025-01-08 22:26:48,950 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) and asserted 70 of 70 statements. [2025-01-08 22:26:48,950 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2025-01-08 22:26:48,950 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-08 22:26:49,093 INFO L134 CoverageAnalysis]: Checked inductivity of 203 backedges. 15 proven. 34 refuted. 0 times theorem prover too weak. 154 trivial. 0 not checked. [2025-01-08 22:26:49,094 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-08 22:26:49,094 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1812874780] [2025-01-08 22:26:49,094 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1812874780] provided 0 perfect and 1 imperfect interpolant sequences [2025-01-08 22:26:49,094 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1386048466] [2025-01-08 22:26:49,094 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-01-08 22:26:49,094 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-08 22:26:49,095 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-08 22:26:49,097 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-01-08 22:26:49,098 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2025-01-08 22:26:49,142 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 70 statements into 5 equivalence classes. [2025-01-08 22:26:49,192 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) and asserted 70 of 70 statements. [2025-01-08 22:26:49,192 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2025-01-08 22:26:49,192 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-08 22:26:49,194 INFO L256 TraceCheckSpWp]: Trace formula consists of 371 conjuncts, 16 conjuncts are in the unsatisfiable core [2025-01-08 22:26:49,195 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-08 22:26:49,321 INFO L134 CoverageAnalysis]: Checked inductivity of 203 backedges. 21 proven. 28 refuted. 0 times theorem prover too weak. 154 trivial. 0 not checked. [2025-01-08 22:26:49,321 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-01-08 22:26:49,437 INFO L134 CoverageAnalysis]: Checked inductivity of 203 backedges. 21 proven. 28 refuted. 0 times theorem prover too weak. 154 trivial. 0 not checked. [2025-01-08 22:26:49,438 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1386048466] provided 0 perfect and 2 imperfect interpolant sequences [2025-01-08 22:26:49,438 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-01-08 22:26:49,438 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 26 [2025-01-08 22:26:49,438 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1501218799] [2025-01-08 22:26:49,438 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-01-08 22:26:49,438 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2025-01-08 22:26:49,438 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-08 22:26:49,438 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2025-01-08 22:26:49,439 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=165, Invalid=485, Unknown=0, NotChecked=0, Total=650 [2025-01-08 22:26:49,439 INFO L87 Difference]: Start difference. First operand 170 states and 207 transitions. Second operand has 26 states, 26 states have (on average 1.7692307692307692) internal successors, (46), 26 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-08 22:26:49,929 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-01-08 22:26:49,929 INFO L93 Difference]: Finished difference Result 350 states and 431 transitions. [2025-01-08 22:26:49,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2025-01-08 22:26:49,929 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.7692307692307692) internal successors, (46), 26 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 70 [2025-01-08 22:26:49,930 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-01-08 22:26:49,931 INFO L225 Difference]: With dead ends: 350 [2025-01-08 22:26:49,931 INFO L226 Difference]: Without dead ends: 215 [2025-01-08 22:26:49,931 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 117 SyntacticMatches, 14 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 521 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=281, Invalid=909, Unknown=0, NotChecked=0, Total=1190 [2025-01-08 22:26:49,932 INFO L435 NwaCegarLoop]: 5 mSDtfsCounter, 3 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 1125 mSolverCounterSat, 267 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 1392 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 267 IncrementalHoareTripleChecker+Valid, 1125 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2025-01-08 22:26:49,932 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 21 Invalid, 1392 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [267 Valid, 1125 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2025-01-08 22:26:49,933 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 215 states. [2025-01-08 22:26:49,958 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 215 to 150. [2025-01-08 22:26:49,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 150 states, 149 states have (on average 1.1946308724832215) internal successors, (178), 149 states have internal predecessors, (178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-08 22:26:49,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 178 transitions. [2025-01-08 22:26:49,960 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 178 transitions. Word has length 70 [2025-01-08 22:26:49,960 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-01-08 22:26:49,960 INFO L471 AbstractCegarLoop]: Abstraction has 150 states and 178 transitions. [2025-01-08 22:26:49,960 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.7692307692307692) internal successors, (46), 26 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-08 22:26:49,960 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 178 transitions. [2025-01-08 22:26:49,960 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2025-01-08 22:26:49,960 INFO L210 NwaCegarLoop]: Found error trace [2025-01-08 22:26:49,960 INFO L218 NwaCegarLoop]: trace histogram [8, 7, 7, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-01-08 22:26:49,970 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2025-01-08 22:26:50,161 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2025-01-08 22:26:50,161 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-01-08 22:26:50,161 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-08 22:26:50,161 INFO L85 PathProgramCache]: Analyzing trace with hash 400546273, now seen corresponding path program 16 times [2025-01-08 22:26:50,161 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-08 22:26:50,161 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [44927406] [2025-01-08 22:26:50,161 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-01-08 22:26:50,162 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-08 22:26:50,168 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 72 statements into 2 equivalence classes. [2025-01-08 22:26:50,174 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) and asserted 69 of 72 statements. [2025-01-08 22:26:50,174 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) [2025-01-08 22:26:50,174 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-08 22:26:50,333 INFO L134 CoverageAnalysis]: Checked inductivity of 218 backedges. 28 proven. 21 refuted. 0 times theorem prover too weak. 169 trivial. 0 not checked. [2025-01-08 22:26:50,333 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-08 22:26:50,333 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [44927406] [2025-01-08 22:26:50,333 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [44927406] provided 0 perfect and 1 imperfect interpolant sequences [2025-01-08 22:26:50,333 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1228775798] [2025-01-08 22:26:50,333 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-01-08 22:26:50,333 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-08 22:26:50,334 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-08 22:26:50,337 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-01-08 22:26:50,341 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2025-01-08 22:26:50,388 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 72 statements into 2 equivalence classes. [2025-01-08 22:26:50,421 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) and asserted 69 of 72 statements. [2025-01-08 22:26:50,422 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) [2025-01-08 22:26:50,422 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-08 22:26:50,423 INFO L256 TraceCheckSpWp]: Trace formula consists of 336 conjuncts, 16 conjuncts are in the unsatisfiable core [2025-01-08 22:26:50,424 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-08 22:26:50,575 INFO L134 CoverageAnalysis]: Checked inductivity of 218 backedges. 35 proven. 21 refuted. 0 times theorem prover too weak. 162 trivial. 0 not checked. [2025-01-08 22:26:50,576 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-01-08 22:26:50,670 INFO L134 CoverageAnalysis]: Checked inductivity of 218 backedges. 35 proven. 21 refuted. 0 times theorem prover too weak. 162 trivial. 0 not checked. [2025-01-08 22:26:50,671 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1228775798] provided 0 perfect and 2 imperfect interpolant sequences [2025-01-08 22:26:50,671 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-01-08 22:26:50,671 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 24 [2025-01-08 22:26:50,671 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [813701277] [2025-01-08 22:26:50,671 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-01-08 22:26:50,671 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2025-01-08 22:26:50,671 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-08 22:26:50,671 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2025-01-08 22:26:50,672 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=409, Unknown=0, NotChecked=0, Total=552 [2025-01-08 22:26:50,672 INFO L87 Difference]: Start difference. First operand 150 states and 178 transitions. Second operand has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 24 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-08 22:26:50,931 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-01-08 22:26:50,931 INFO L93 Difference]: Finished difference Result 217 states and 252 transitions. [2025-01-08 22:26:50,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2025-01-08 22:26:50,932 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 24 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 72 [2025-01-08 22:26:50,932 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-01-08 22:26:50,932 INFO L225 Difference]: With dead ends: 217 [2025-01-08 22:26:50,932 INFO L226 Difference]: Without dead ends: 78 [2025-01-08 22:26:50,933 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 123 SyntacticMatches, 14 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 322 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=248, Invalid=682, Unknown=0, NotChecked=0, Total=930 [2025-01-08 22:26:50,934 INFO L435 NwaCegarLoop]: 6 mSDtfsCounter, 8 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 392 mSolverCounterSat, 258 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 650 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 258 IncrementalHoareTripleChecker+Valid, 392 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2025-01-08 22:26:50,934 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 28 Invalid, 650 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [258 Valid, 392 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2025-01-08 22:26:50,934 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2025-01-08 22:26:50,949 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 78. [2025-01-08 22:26:50,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 77 states have (on average 1.1168831168831168) internal successors, (86), 77 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-08 22:26:50,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 86 transitions. [2025-01-08 22:26:50,950 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 86 transitions. Word has length 72 [2025-01-08 22:26:50,950 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-01-08 22:26:50,950 INFO L471 AbstractCegarLoop]: Abstraction has 78 states and 86 transitions. [2025-01-08 22:26:50,950 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 24 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-08 22:26:50,950 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 86 transitions. [2025-01-08 22:26:50,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2025-01-08 22:26:50,951 INFO L210 NwaCegarLoop]: Found error trace [2025-01-08 22:26:50,951 INFO L218 NwaCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-01-08 22:26:50,957 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2025-01-08 22:26:51,155 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2025-01-08 22:26:51,155 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-01-08 22:26:51,155 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-08 22:26:51,155 INFO L85 PathProgramCache]: Analyzing trace with hash -42546698, now seen corresponding path program 17 times [2025-01-08 22:26:51,155 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-08 22:26:51,155 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [710129056] [2025-01-08 22:26:51,155 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-01-08 22:26:51,155 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-08 22:26:51,162 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 77 statements into 5 equivalence classes. [2025-01-08 22:26:51,217 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) and asserted 77 of 77 statements. [2025-01-08 22:26:51,218 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2025-01-08 22:26:51,218 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-08 22:26:59,695 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 0 proven. 252 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-01-08 22:26:59,696 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-08 22:26:59,696 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [710129056] [2025-01-08 22:26:59,696 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [710129056] provided 0 perfect and 1 imperfect interpolant sequences [2025-01-08 22:26:59,696 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [14096272] [2025-01-08 22:26:59,696 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-01-08 22:26:59,696 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-08 22:26:59,696 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-08 22:26:59,698 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) [2025-01-08 22:26:59,699 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 [2025-01-08 22:26:59,747 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 77 statements into 5 equivalence classes. [2025-01-08 22:27:00,035 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) and asserted 77 of 77 statements. [2025-01-08 22:27:00,036 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2025-01-08 22:27:00,036 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-08 22:27:00,040 WARN L254 TraceCheckSpWp]: Trace formula consists of 406 conjuncts, 249 conjuncts are in the unsatisfiable core [2025-01-08 22:27:00,044 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-08 22:27:00,332 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 [2025-01-08 22:27:00,410 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 [2025-01-08 22:27:01,941 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 0 proven. 252 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-01-08 22:27:01,941 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-01-08 22:27:03,301 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 0 proven. 224 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2025-01-08 22:27:03,301 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [14096272] provided 0 perfect and 2 imperfect interpolant sequences [2025-01-08 22:27:03,301 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-01-08 22:27:03,301 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [63, 27, 19] total 99 [2025-01-08 22:27:03,302 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [20331523] [2025-01-08 22:27:03,302 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-01-08 22:27:03,302 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 99 states [2025-01-08 22:27:03,302 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-08 22:27:03,302 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 99 interpolants. [2025-01-08 22:27:03,304 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=374, Invalid=9328, Unknown=0, NotChecked=0, Total=9702 [2025-01-08 22:27:03,304 INFO L87 Difference]: Start difference. First operand 78 states and 86 transitions. Second operand has 99 states, 99 states have (on average 2.1616161616161618) internal successors, (214), 99 states have internal predecessors, (214), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-08 22:27:06,731 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-01-08 22:27:06,732 INFO L93 Difference]: Finished difference Result 138 states and 153 transitions. [2025-01-08 22:27:06,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2025-01-08 22:27:06,732 INFO L78 Accepts]: Start accepts. Automaton has has 99 states, 99 states have (on average 2.1616161616161618) internal successors, (214), 99 states have internal predecessors, (214), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 77 [2025-01-08 22:27:06,732 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-01-08 22:27:06,733 INFO L225 Difference]: With dead ends: 138 [2025-01-08 22:27:06,733 INFO L226 Difference]: Without dead ends: 135 [2025-01-08 22:27:06,736 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 249 GetRequests, 129 SyntacticMatches, 1 SemanticMatches, 119 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3627 ImplicationChecksByTransitivity, 6.3s TimeCoverageRelationStatistics Valid=552, Invalid=13968, Unknown=0, NotChecked=0, Total=14520 [2025-01-08 22:27:06,736 INFO L435 NwaCegarLoop]: 13 mSDtfsCounter, 4 mSDsluCounter, 198 mSDsCounter, 0 mSdLazyCounter, 4130 mSolverCounterSat, 62 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 211 SdHoareTripleChecker+Invalid, 4192 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 62 IncrementalHoareTripleChecker+Valid, 4130 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2025-01-08 22:27:06,736 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 211 Invalid, 4192 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [62 Valid, 4130 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2025-01-08 22:27:06,737 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2025-01-08 22:27:06,761 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 128. [2025-01-08 22:27:06,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 128 states, 127 states have (on average 1.125984251968504) internal successors, (143), 127 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-08 22:27:06,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 143 transitions. [2025-01-08 22:27:06,762 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 143 transitions. Word has length 77 [2025-01-08 22:27:06,762 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-01-08 22:27:06,762 INFO L471 AbstractCegarLoop]: Abstraction has 128 states and 143 transitions. [2025-01-08 22:27:06,763 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 99 states, 99 states have (on average 2.1616161616161618) internal successors, (214), 99 states have internal predecessors, (214), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-08 22:27:06,763 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 143 transitions. [2025-01-08 22:27:06,763 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2025-01-08 22:27:06,763 INFO L210 NwaCegarLoop]: Found error trace [2025-01-08 22:27:06,763 INFO L218 NwaCegarLoop]: trace histogram [8, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-01-08 22:27:06,771 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2025-01-08 22:27:06,964 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,18 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-08 22:27:06,964 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-01-08 22:27:06,964 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-08 22:27:06,964 INFO L85 PathProgramCache]: Analyzing trace with hash 2029665343, now seen corresponding path program 18 times [2025-01-08 22:27:06,965 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-08 22:27:06,965 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1792720400] [2025-01-08 22:27:06,965 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-01-08 22:27:06,965 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-08 22:27:06,971 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 78 statements into 5 equivalence classes. [2025-01-08 22:27:06,990 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) and asserted 78 of 78 statements. [2025-01-08 22:27:06,990 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2025-01-08 22:27:06,990 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-08 22:27:07,178 INFO L134 CoverageAnalysis]: Checked inductivity of 260 backedges. 21 proven. 43 refuted. 0 times theorem prover too weak. 196 trivial. 0 not checked. [2025-01-08 22:27:07,179 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-08 22:27:07,179 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1792720400] [2025-01-08 22:27:07,179 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1792720400] provided 0 perfect and 1 imperfect interpolant sequences [2025-01-08 22:27:07,179 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1855346452] [2025-01-08 22:27:07,179 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-01-08 22:27:07,179 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-08 22:27:07,179 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-08 22:27:07,181 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) [2025-01-08 22:27:07,183 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 [2025-01-08 22:27:07,228 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 78 statements into 5 equivalence classes. [2025-01-08 22:27:07,290 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) and asserted 78 of 78 statements. [2025-01-08 22:27:07,291 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2025-01-08 22:27:07,291 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-08 22:27:07,297 INFO L256 TraceCheckSpWp]: Trace formula consists of 411 conjuncts, 21 conjuncts are in the unsatisfiable core [2025-01-08 22:27:07,299 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-08 22:27:07,583 INFO L134 CoverageAnalysis]: Checked inductivity of 260 backedges. 36 proven. 28 refuted. 0 times theorem prover too weak. 196 trivial. 0 not checked. [2025-01-08 22:27:07,583 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-01-08 22:27:07,860 INFO L134 CoverageAnalysis]: Checked inductivity of 260 backedges. 36 proven. 35 refuted. 0 times theorem prover too weak. 189 trivial. 0 not checked. [2025-01-08 22:27:07,861 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1855346452] provided 0 perfect and 2 imperfect interpolant sequences [2025-01-08 22:27:07,861 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-01-08 22:27:07,861 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 20] total 44 [2025-01-08 22:27:07,861 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [215332244] [2025-01-08 22:27:07,861 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-01-08 22:27:07,861 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2025-01-08 22:27:07,862 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-08 22:27:07,862 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2025-01-08 22:27:07,863 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=308, Invalid=1584, Unknown=0, NotChecked=0, Total=1892 [2025-01-08 22:27:07,863 INFO L87 Difference]: Start difference. First operand 128 states and 143 transitions. Second operand has 44 states, 44 states have (on average 1.5454545454545454) internal successors, (68), 44 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-08 22:27:09,000 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-01-08 22:27:09,001 INFO L93 Difference]: Finished difference Result 260 states and 297 transitions. [2025-01-08 22:27:09,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2025-01-08 22:27:09,002 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 1.5454545454545454) internal successors, (68), 44 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 78 [2025-01-08 22:27:09,002 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-01-08 22:27:09,003 INFO L225 Difference]: With dead ends: 260 [2025-01-08 22:27:09,003 INFO L226 Difference]: Without dead ends: 87 [2025-01-08 22:27:09,004 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 213 GetRequests, 137 SyntacticMatches, 10 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1366 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=683, Invalid=3873, Unknown=0, NotChecked=0, Total=4556 [2025-01-08 22:27:09,004 INFO L435 NwaCegarLoop]: 5 mSDtfsCounter, 104 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 2090 mSolverCounterSat, 599 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 104 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 2689 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 599 IncrementalHoareTripleChecker+Valid, 2090 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2025-01-08 22:27:09,004 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [104 Valid, 42 Invalid, 2689 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [599 Valid, 2090 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2025-01-08 22:27:09,005 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2025-01-08 22:27:09,021 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 87. [2025-01-08 22:27:09,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 86 states have (on average 1.1046511627906976) internal successors, (95), 86 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-08 22:27:09,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 95 transitions. [2025-01-08 22:27:09,023 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 95 transitions. Word has length 78 [2025-01-08 22:27:09,023 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-01-08 22:27:09,023 INFO L471 AbstractCegarLoop]: Abstraction has 87 states and 95 transitions. [2025-01-08 22:27:09,023 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 1.5454545454545454) internal successors, (68), 44 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-08 22:27:09,023 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 95 transitions. [2025-01-08 22:27:09,024 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2025-01-08 22:27:09,024 INFO L210 NwaCegarLoop]: Found error trace [2025-01-08 22:27:09,024 INFO L218 NwaCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-01-08 22:27:09,030 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 [2025-01-08 22:27:09,227 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,19 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-08 22:27:09,228 INFO L396 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-01-08 22:27:09,228 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-08 22:27:09,228 INFO L85 PathProgramCache]: Analyzing trace with hash -674211773, now seen corresponding path program 19 times [2025-01-08 22:27:09,228 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-08 22:27:09,228 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [305144567] [2025-01-08 22:27:09,229 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-01-08 22:27:09,229 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-08 22:27:09,236 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 86 statements into 1 equivalence classes. [2025-01-08 22:27:09,340 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 86 of 86 statements. [2025-01-08 22:27:09,341 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-08 22:27:09,341 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-08 22:27:22,683 INFO L134 CoverageAnalysis]: Checked inductivity of 324 backedges. 13 proven. 311 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-01-08 22:27:22,684 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-08 22:27:22,684 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [305144567] [2025-01-08 22:27:22,684 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [305144567] provided 0 perfect and 1 imperfect interpolant sequences [2025-01-08 22:27:22,684 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [550742097] [2025-01-08 22:27:22,684 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-01-08 22:27:22,684 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-08 22:27:22,684 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-08 22:27:22,690 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) [2025-01-08 22:27:22,693 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 [2025-01-08 22:27:22,806 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 86 statements into 1 equivalence classes. [2025-01-08 22:27:22,867 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 86 of 86 statements. [2025-01-08 22:27:22,867 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-08 22:27:22,868 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-08 22:27:22,878 WARN L254 TraceCheckSpWp]: Trace formula consists of 453 conjuncts, 281 conjuncts are in the unsatisfiable core [2025-01-08 22:27:22,883 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-08 22:27:23,210 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 [2025-01-08 22:27:24,880 INFO L134 CoverageAnalysis]: Checked inductivity of 324 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-01-08 22:27:24,881 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-01-08 22:27:26,597 INFO L134 CoverageAnalysis]: Checked inductivity of 324 backedges. 0 proven. 288 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2025-01-08 22:27:26,598 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [550742097] provided 0 perfect and 2 imperfect interpolant sequences [2025-01-08 22:27:26,598 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-01-08 22:27:26,598 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [73, 30, 21] total 115 [2025-01-08 22:27:26,598 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1820753659] [2025-01-08 22:27:26,598 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-01-08 22:27:26,599 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 115 states [2025-01-08 22:27:26,599 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-08 22:27:26,601 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 115 interpolants. [2025-01-08 22:27:26,609 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=590, Invalid=12520, Unknown=0, NotChecked=0, Total=13110 [2025-01-08 22:27:26,610 INFO L87 Difference]: Start difference. First operand 87 states and 95 transitions. Second operand has 115 states, 115 states have (on average 2.0956521739130434) internal successors, (241), 115 states have internal predecessors, (241), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)