./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/array-fpi/s5if.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 48c9605d Calling Ultimate with: /root/.sdkman/candidates/java/21.0.5-tem/bin/java -Dosgi.configuration.area=/storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.6.800.v20240513-1750.jar -data @noDefault -ultimatedata /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/array-fpi/s5if.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 b618695aa08df106816e7defd71220f009a5c8c09539ff7c8c29235c85f2ce8d --- Real Ultimate output --- This is Ultimate 0.3.0-?-48c9605-m [2025-02-07 17:25:15,911 INFO L188 SettingsManager]: Resetting all preferences to default values... [2025-02-07 17:25:15,948 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2025-02-07 17:25:15,955 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2025-02-07 17:25:15,958 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2025-02-07 17:25:15,980 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2025-02-07 17:25:15,982 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2025-02-07 17:25:15,982 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2025-02-07 17:25:15,983 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2025-02-07 17:25:15,983 INFO L153 SettingsManager]: * Use memory slicer=true [2025-02-07 17:25:15,983 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2025-02-07 17:25:15,983 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2025-02-07 17:25:15,984 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2025-02-07 17:25:15,984 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2025-02-07 17:25:15,984 INFO L153 SettingsManager]: * Use SBE=true [2025-02-07 17:25:15,984 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2025-02-07 17:25:15,984 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2025-02-07 17:25:15,985 INFO L153 SettingsManager]: * sizeof long=4 [2025-02-07 17:25:15,985 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2025-02-07 17:25:15,985 INFO L153 SettingsManager]: * sizeof POINTER=4 [2025-02-07 17:25:15,985 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2025-02-07 17:25:15,985 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2025-02-07 17:25:15,985 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2025-02-07 17:25:15,985 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2025-02-07 17:25:15,985 INFO L153 SettingsManager]: * sizeof long double=12 [2025-02-07 17:25:15,985 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2025-02-07 17:25:15,985 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2025-02-07 17:25:15,985 INFO L153 SettingsManager]: * Use constant arrays=true [2025-02-07 17:25:15,985 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2025-02-07 17:25:15,985 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2025-02-07 17:25:15,986 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2025-02-07 17:25:15,986 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2025-02-07 17:25:15,986 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-02-07 17:25:15,986 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2025-02-07 17:25:15,986 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2025-02-07 17:25:15,986 INFO L153 SettingsManager]: * Compute procedure contracts=false [2025-02-07 17:25:15,986 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2025-02-07 17:25:15,987 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2025-02-07 17:25:15,987 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2025-02-07 17:25:15,987 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2025-02-07 17:25:15,987 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2025-02-07 17:25:15,987 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2025-02-07 17:25:15,987 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2025-02-07 17:25:15,987 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 -> b618695aa08df106816e7defd71220f009a5c8c09539ff7c8c29235c85f2ce8d [2025-02-07 17:25:16,227 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2025-02-07 17:25:16,236 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2025-02-07 17:25:16,238 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2025-02-07 17:25:16,240 INFO L270 PluginConnector]: Initializing CDTParser... [2025-02-07 17:25:16,240 INFO L274 PluginConnector]: CDTParser initialized [2025-02-07 17:25:16,241 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-fpi/s5if.c [2025-02-07 17:25:17,477 INFO L533 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/9620f1971/e37dffe53356439f8488a32d14aa0881/FLAG97ff3967c [2025-02-07 17:25:17,702 INFO L384 CDTParser]: Found 1 translation units. [2025-02-07 17:25:17,704 INFO L180 CDTParser]: Scanning /storage/repos/ultimate-jdk21/releaseScripts/default/sv-benchmarks/c/array-fpi/s5if.c [2025-02-07 17:25:17,741 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/9620f1971/e37dffe53356439f8488a32d14aa0881/FLAG97ff3967c [2025-02-07 17:25:17,758 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/9620f1971/e37dffe53356439f8488a32d14aa0881 [2025-02-07 17:25:17,759 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2025-02-07 17:25:17,761 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2025-02-07 17:25:17,761 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2025-02-07 17:25:17,761 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2025-02-07 17:25:17,764 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2025-02-07 17:25:17,765 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.02 05:25:17" (1/1) ... [2025-02-07 17:25:17,765 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1ace9b1e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 05:25:17, skipping insertion in model container [2025-02-07 17:25:17,765 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.02 05:25:17" (1/1) ... [2025-02-07 17:25:17,777 INFO L175 MainTranslator]: Built tables and reachable declarations [2025-02-07 17:25:17,874 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-fpi/s5if.c[587,600] [2025-02-07 17:25:17,889 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-02-07 17:25:17,896 INFO L200 MainTranslator]: Completed pre-run [2025-02-07 17:25:17,904 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-fpi/s5if.c[587,600] [2025-02-07 17:25:17,915 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-02-07 17:25:17,925 INFO L204 MainTranslator]: Completed translation [2025-02-07 17:25:17,925 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 05:25:17 WrapperNode [2025-02-07 17:25:17,926 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2025-02-07 17:25:17,928 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2025-02-07 17:25:17,928 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2025-02-07 17:25:17,928 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2025-02-07 17:25:17,931 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 05:25:17" (1/1) ... [2025-02-07 17:25:17,935 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 05:25:17" (1/1) ... [2025-02-07 17:25:17,949 INFO L138 Inliner]: procedures = 17, calls = 30, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 73 [2025-02-07 17:25:17,949 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2025-02-07 17:25:17,950 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2025-02-07 17:25:17,950 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2025-02-07 17:25:17,950 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2025-02-07 17:25:17,955 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 05:25:17" (1/1) ... [2025-02-07 17:25:17,955 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 05:25:17" (1/1) ... [2025-02-07 17:25:17,956 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 05:25:17" (1/1) ... [2025-02-07 17:25:17,964 INFO L175 MemorySlicer]: Split 19 memory accesses to 4 slices as follows [2, 7, 6, 4]. 37 percent of accesses are in the largest equivalence class. The 9 initializations are split as follows [2, 7, 0, 0]. The 4 writes are split as follows [0, 0, 3, 1]. [2025-02-07 17:25:17,964 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 05:25:17" (1/1) ... [2025-02-07 17:25:17,964 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 05:25:17" (1/1) ... [2025-02-07 17:25:17,967 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 05:25:17" (1/1) ... [2025-02-07 17:25:17,968 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 05:25:17" (1/1) ... [2025-02-07 17:25:17,968 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 05:25:17" (1/1) ... [2025-02-07 17:25:17,969 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 05:25:17" (1/1) ... [2025-02-07 17:25:17,970 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2025-02-07 17:25:17,970 INFO L112 PluginConnector]: ------------------------IcfgBuilder---------------------------- [2025-02-07 17:25:17,970 INFO L270 PluginConnector]: Initializing IcfgBuilder... [2025-02-07 17:25:17,970 INFO L274 PluginConnector]: IcfgBuilder initialized [2025-02-07 17:25:17,971 INFO L184 PluginConnector]: Executing the observer IcfgBuilderObserver from plugin IcfgBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 05:25:17" (1/1) ... [2025-02-07 17:25:17,975 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-02-07 17:25:17,985 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-07 17:25:17,995 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2025-02-07 17:25:17,996 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2025-02-07 17:25:18,012 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2025-02-07 17:25:18,012 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2025-02-07 17:25:18,012 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2025-02-07 17:25:18,012 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2025-02-07 17:25:18,012 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2025-02-07 17:25:18,012 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2025-02-07 17:25:18,012 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2025-02-07 17:25:18,012 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2025-02-07 17:25:18,012 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2025-02-07 17:25:18,012 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2025-02-07 17:25:18,012 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2025-02-07 17:25:18,012 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2025-02-07 17:25:18,012 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2025-02-07 17:25:18,012 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2025-02-07 17:25:18,012 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2025-02-07 17:25:18,012 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2025-02-07 17:25:18,012 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#3 [2025-02-07 17:25:18,012 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2025-02-07 17:25:18,061 INFO L257 CfgBuilder]: Building ICFG [2025-02-07 17:25:18,063 INFO L287 CfgBuilder]: Building CFG for each procedure with an implementation [2025-02-07 17:25:18,144 INFO L1324 $ProcedureCfgBuilder]: dead code at ProgramPoint L28: call ULTIMATE.dealloc(main_~#sum~0#1.base, main_~#sum~0#1.offset);havoc main_~#sum~0#1.base, main_~#sum~0#1.offset; [2025-02-07 17:25:18,148 INFO L? ?]: Removed 10 outVars from TransFormulas that were not future-live. [2025-02-07 17:25:18,148 INFO L308 CfgBuilder]: Performing block encoding [2025-02-07 17:25:18,152 INFO L332 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2025-02-07 17:25:18,153 INFO L337 CfgBuilder]: Removed 0 assume(true) statements. [2025-02-07 17:25:18,153 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 07.02 05:25:18 BoogieIcfgContainer [2025-02-07 17:25:18,153 INFO L131 PluginConnector]: ------------------------ END IcfgBuilder---------------------------- [2025-02-07 17:25:18,154 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2025-02-07 17:25:18,154 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2025-02-07 17:25:18,157 INFO L274 PluginConnector]: TraceAbstraction initialized [2025-02-07 17:25:18,157 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.02 05:25:17" (1/3) ... [2025-02-07 17:25:18,158 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5e5f7fcf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.02 05:25:18, skipping insertion in model container [2025-02-07 17:25:18,158 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 05:25:17" (2/3) ... [2025-02-07 17:25:18,158 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5e5f7fcf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.02 05:25:18, skipping insertion in model container [2025-02-07 17:25:18,158 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 07.02 05:25:18" (3/3) ... [2025-02-07 17:25:18,159 INFO L128 eAbstractionObserver]: Analyzing ICFG s5if.c [2025-02-07 17:25:18,167 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2025-02-07 17:25:18,168 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG s5if.c that has 1 procedures, 15 locations, 1 initial locations, 2 loop locations, and 1 error locations. [2025-02-07 17:25:18,210 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2025-02-07 17:25:18,217 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;@12e475a2, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2025-02-07 17:25:18,217 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2025-02-07 17:25:18,220 INFO L276 IsEmpty]: Start isEmpty. Operand has 15 states, 13 states have (on average 1.5384615384615385) internal successors, (20), 14 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-07 17:25:18,226 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2025-02-07 17:25:18,230 INFO L210 NwaCegarLoop]: Found error trace [2025-02-07 17:25:18,231 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2025-02-07 17:25:18,232 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-07 17:25:18,238 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-07 17:25:18,239 INFO L85 PathProgramCache]: Analyzing trace with hash -1854963527, now seen corresponding path program 1 times [2025-02-07 17:25:18,247 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-07 17:25:18,251 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2111071054] [2025-02-07 17:25:18,252 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-07 17:25:18,252 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-07 17:25:18,329 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 8 statements into 1 equivalence classes. [2025-02-07 17:25:18,340 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 8 of 8 statements. [2025-02-07 17:25:18,340 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-07 17:25:18,340 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 17:25:18,373 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-07 17:25:18,373 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-07 17:25:18,373 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2111071054] [2025-02-07 17:25:18,374 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2111071054] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-07 17:25:18,374 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-07 17:25:18,374 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2025-02-07 17:25:18,375 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [459222416] [2025-02-07 17:25:18,376 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-07 17:25:18,378 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2025-02-07 17:25:18,378 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-07 17:25:18,390 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2025-02-07 17:25:18,390 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2025-02-07 17:25:18,392 INFO L87 Difference]: Start difference. First operand has 15 states, 13 states have (on average 1.5384615384615385) internal successors, (20), 14 states have internal predecessors, (20), 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 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-07 17:25:18,399 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-07 17:25:18,399 INFO L93 Difference]: Finished difference Result 27 states and 35 transitions. [2025-02-07 17:25:18,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2025-02-07 17:25:18,400 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 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 8 [2025-02-07 17:25:18,401 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-07 17:25:18,404 INFO L225 Difference]: With dead ends: 27 [2025-02-07 17:25:18,404 INFO L226 Difference]: Without dead ends: 11 [2025-02-07 17:25:18,406 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2025-02-07 17:25:18,408 INFO L435 NwaCegarLoop]: 18 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 18 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-02-07 17:25:18,409 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-02-07 17:25:18,418 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2025-02-07 17:25:18,423 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 11. [2025-02-07 17:25:18,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11 states, 10 states have (on average 1.3) internal successors, (13), 10 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-07 17:25:18,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 13 transitions. [2025-02-07 17:25:18,427 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 13 transitions. Word has length 8 [2025-02-07 17:25:18,427 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-07 17:25:18,427 INFO L471 AbstractCegarLoop]: Abstraction has 11 states and 13 transitions. [2025-02-07 17:25:18,428 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-07 17:25:18,428 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 13 transitions. [2025-02-07 17:25:18,428 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2025-02-07 17:25:18,428 INFO L210 NwaCegarLoop]: Found error trace [2025-02-07 17:25:18,428 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2025-02-07 17:25:18,428 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2025-02-07 17:25:18,429 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-07 17:25:18,429 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-07 17:25:18,429 INFO L85 PathProgramCache]: Analyzing trace with hash -1826334376, now seen corresponding path program 1 times [2025-02-07 17:25:18,429 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-07 17:25:18,429 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1796661455] [2025-02-07 17:25:18,429 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-07 17:25:18,430 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-07 17:25:18,438 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 8 statements into 1 equivalence classes. [2025-02-07 17:25:18,447 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 8 of 8 statements. [2025-02-07 17:25:18,448 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-07 17:25:18,448 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 17:25:18,539 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-07 17:25:18,540 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-07 17:25:18,540 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1796661455] [2025-02-07 17:25:18,540 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1796661455] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-07 17:25:18,540 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-07 17:25:18,540 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2025-02-07 17:25:18,540 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1621742940] [2025-02-07 17:25:18,540 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-07 17:25:18,541 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-02-07 17:25:18,542 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-07 17:25:18,543 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-02-07 17:25:18,543 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2025-02-07 17:25:18,543 INFO L87 Difference]: Start difference. First operand 11 states and 13 transitions. Second operand has 4 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-07 17:25:18,585 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-07 17:25:18,585 INFO L93 Difference]: Finished difference Result 21 states and 27 transitions. [2025-02-07 17:25:18,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-02-07 17:25:18,586 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 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 8 [2025-02-07 17:25:18,586 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-07 17:25:18,586 INFO L225 Difference]: With dead ends: 21 [2025-02-07 17:25:18,586 INFO L226 Difference]: Without dead ends: 15 [2025-02-07 17:25:18,587 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 [2025-02-07 17:25:18,588 INFO L435 NwaCegarLoop]: 5 mSDtfsCounter, 13 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 8 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-02-07 17:25:18,588 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 8 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-02-07 17:25:18,589 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2025-02-07 17:25:18,592 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 13. [2025-02-07 17:25:18,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13 states, 12 states have (on average 1.25) internal successors, (15), 12 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) [2025-02-07 17:25:18,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 15 transitions. [2025-02-07 17:25:18,593 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 15 transitions. Word has length 8 [2025-02-07 17:25:18,594 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-07 17:25:18,594 INFO L471 AbstractCegarLoop]: Abstraction has 13 states and 15 transitions. [2025-02-07 17:25:18,594 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-07 17:25:18,594 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 15 transitions. [2025-02-07 17:25:18,594 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2025-02-07 17:25:18,594 INFO L210 NwaCegarLoop]: Found error trace [2025-02-07 17:25:18,595 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-07 17:25:18,595 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2025-02-07 17:25:18,595 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-07 17:25:18,595 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-07 17:25:18,595 INFO L85 PathProgramCache]: Analyzing trace with hash -955252263, now seen corresponding path program 1 times [2025-02-07 17:25:18,596 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-07 17:25:18,596 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [75465204] [2025-02-07 17:25:18,596 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-07 17:25:18,596 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-07 17:25:18,615 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 12 statements into 1 equivalence classes. [2025-02-07 17:25:18,656 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 12 of 12 statements. [2025-02-07 17:25:18,656 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-07 17:25:18,656 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 17:25:19,146 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-07 17:25:19,147 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-07 17:25:19,147 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [75465204] [2025-02-07 17:25:19,147 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [75465204] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-07 17:25:19,147 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [759423595] [2025-02-07 17:25:19,147 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-07 17:25:19,150 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-07 17:25:19,150 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-07 17:25:19,152 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-07 17:25:19,153 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2025-02-07 17:25:19,191 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 12 statements into 1 equivalence classes. [2025-02-07 17:25:19,203 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 12 of 12 statements. [2025-02-07 17:25:19,204 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-07 17:25:19,204 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 17:25:19,205 INFO L256 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 19 conjuncts are in the unsatisfiable core [2025-02-07 17:25:19,208 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-07 17:25:19,251 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2025-02-07 17:25:19,346 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 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 19 treesize of output 11 [2025-02-07 17:25:19,365 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-07 17:25:19,365 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-07 17:25:19,507 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-07 17:25:19,508 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [759423595] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-07 17:25:19,508 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-07 17:25:19,508 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 19 [2025-02-07 17:25:19,509 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [307410935] [2025-02-07 17:25:19,509 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-07 17:25:19,509 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2025-02-07 17:25:19,509 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-07 17:25:19,510 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2025-02-07 17:25:19,511 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=266, Unknown=0, NotChecked=0, Total=342 [2025-02-07 17:25:19,511 INFO L87 Difference]: Start difference. First operand 13 states and 15 transitions. Second operand has 19 states, 19 states have (on average 1.368421052631579) internal successors, (26), 19 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-07 17:25:19,724 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-07 17:25:19,725 INFO L93 Difference]: Finished difference Result 25 states and 31 transitions. [2025-02-07 17:25:19,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2025-02-07 17:25:19,726 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.368421052631579) internal successors, (26), 19 states have internal predecessors, (26), 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 12 [2025-02-07 17:25:19,726 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-07 17:25:19,726 INFO L225 Difference]: With dead ends: 25 [2025-02-07 17:25:19,726 INFO L226 Difference]: Without dead ends: 22 [2025-02-07 17:25:19,727 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 170 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=154, Invalid=496, Unknown=0, NotChecked=0, Total=650 [2025-02-07 17:25:19,727 INFO L435 NwaCegarLoop]: 5 mSDtfsCounter, 18 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 155 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 172 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 155 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-02-07 17:25:19,727 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 37 Invalid, 172 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 155 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-02-07 17:25:19,728 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2025-02-07 17:25:19,730 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 19. [2025-02-07 17:25:19,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 18 states have (on average 1.3333333333333333) internal successors, (24), 18 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) [2025-02-07 17:25:19,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 24 transitions. [2025-02-07 17:25:19,730 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 24 transitions. Word has length 12 [2025-02-07 17:25:19,730 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-07 17:25:19,730 INFO L471 AbstractCegarLoop]: Abstraction has 19 states and 24 transitions. [2025-02-07 17:25:19,731 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.368421052631579) internal successors, (26), 19 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-07 17:25:19,731 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 24 transitions. [2025-02-07 17:25:19,731 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2025-02-07 17:25:19,731 INFO L210 NwaCegarLoop]: Found error trace [2025-02-07 17:25:19,731 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-07 17:25:19,740 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2025-02-07 17:25:19,931 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 [2025-02-07 17:25:19,931 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-07 17:25:19,932 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-07 17:25:19,932 INFO L85 PathProgramCache]: Analyzing trace with hash -954328742, now seen corresponding path program 1 times [2025-02-07 17:25:19,932 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-07 17:25:19,932 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [454397440] [2025-02-07 17:25:19,932 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-07 17:25:19,932 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-07 17:25:19,939 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 12 statements into 1 equivalence classes. [2025-02-07 17:25:19,946 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 12 of 12 statements. [2025-02-07 17:25:19,946 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-07 17:25:19,946 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 17:25:20,068 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-07 17:25:20,069 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-07 17:25:20,069 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [454397440] [2025-02-07 17:25:20,069 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [454397440] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-07 17:25:20,069 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [778801439] [2025-02-07 17:25:20,069 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-07 17:25:20,069 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-07 17:25:20,069 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-07 17:25:20,074 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-07 17:25:20,077 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2025-02-07 17:25:20,105 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 12 statements into 1 equivalence classes. [2025-02-07 17:25:20,116 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 12 of 12 statements. [2025-02-07 17:25:20,116 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-07 17:25:20,116 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 17:25:20,117 INFO L256 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 11 conjuncts are in the unsatisfiable core [2025-02-07 17:25:20,118 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-07 17:25:20,137 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2025-02-07 17:25:20,152 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-07 17:25:20,152 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-07 17:25:20,171 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 14 treesize of output 12 [2025-02-07 17:25:20,174 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 12 [2025-02-07 17:25:20,180 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-07 17:25:20,181 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [778801439] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-07 17:25:20,181 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-07 17:25:20,181 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 10 [2025-02-07 17:25:20,181 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1646979928] [2025-02-07 17:25:20,181 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-07 17:25:20,181 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2025-02-07 17:25:20,181 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-07 17:25:20,181 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2025-02-07 17:25:20,181 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2025-02-07 17:25:20,182 INFO L87 Difference]: Start difference. First operand 19 states and 24 transitions. Second operand has 10 states, 10 states have (on average 1.8) internal successors, (18), 10 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-07 17:25:20,213 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-07 17:25:20,214 INFO L93 Difference]: Finished difference Result 31 states and 39 transitions. [2025-02-07 17:25:20,214 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2025-02-07 17:25:20,214 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.8) internal successors, (18), 10 states have internal predecessors, (18), 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 12 [2025-02-07 17:25:20,214 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-07 17:25:20,214 INFO L225 Difference]: With dead ends: 31 [2025-02-07 17:25:20,214 INFO L226 Difference]: Without dead ends: 20 [2025-02-07 17:25:20,215 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2025-02-07 17:25:20,215 INFO L435 NwaCegarLoop]: 8 mSDtfsCounter, 15 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-02-07 17:25:20,215 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 27 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-02-07 17:25:20,216 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2025-02-07 17:25:20,218 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 19. [2025-02-07 17:25:20,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 18 states have (on average 1.2222222222222223) internal successors, (22), 18 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-07 17:25:20,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 22 transitions. [2025-02-07 17:25:20,219 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 22 transitions. Word has length 12 [2025-02-07 17:25:20,219 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-07 17:25:20,219 INFO L471 AbstractCegarLoop]: Abstraction has 19 states and 22 transitions. [2025-02-07 17:25:20,219 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 1.8) internal successors, (18), 10 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-07 17:25:20,219 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 22 transitions. [2025-02-07 17:25:20,219 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2025-02-07 17:25:20,219 INFO L210 NwaCegarLoop]: Found error trace [2025-02-07 17:25:20,219 INFO L218 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-07 17:25:20,225 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2025-02-07 17:25:20,424 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 [2025-02-07 17:25:20,424 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-07 17:25:20,425 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-07 17:25:20,425 INFO L85 PathProgramCache]: Analyzing trace with hash -1154488789, now seen corresponding path program 2 times [2025-02-07 17:25:20,425 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-07 17:25:20,425 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2113785535] [2025-02-07 17:25:20,425 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-07 17:25:20,425 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-07 17:25:20,434 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 13 statements into 2 equivalence classes. [2025-02-07 17:25:20,443 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 13 of 13 statements. [2025-02-07 17:25:20,443 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-02-07 17:25:20,443 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 17:25:20,495 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-07 17:25:20,496 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-07 17:25:20,496 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2113785535] [2025-02-07 17:25:20,496 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2113785535] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-07 17:25:20,496 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1317188125] [2025-02-07 17:25:20,496 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-07 17:25:20,496 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-07 17:25:20,497 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-07 17:25:20,500 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-07 17:25:20,502 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2025-02-07 17:25:20,537 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 13 statements into 2 equivalence classes. [2025-02-07 17:25:20,551 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 13 of 13 statements. [2025-02-07 17:25:20,552 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-02-07 17:25:20,552 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 17:25:20,553 INFO L256 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 6 conjuncts are in the unsatisfiable core [2025-02-07 17:25:20,553 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-07 17:25:20,606 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-07 17:25:20,606 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-07 17:25:20,648 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-07 17:25:20,648 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1317188125] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-07 17:25:20,648 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-07 17:25:20,649 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 11 [2025-02-07 17:25:20,649 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [824828571] [2025-02-07 17:25:20,649 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-07 17:25:20,649 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2025-02-07 17:25:20,649 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-07 17:25:20,649 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2025-02-07 17:25:20,649 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2025-02-07 17:25:20,649 INFO L87 Difference]: Start difference. First operand 19 states and 22 transitions. Second operand has 11 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 11 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) [2025-02-07 17:25:20,739 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-07 17:25:20,739 INFO L93 Difference]: Finished difference Result 26 states and 30 transitions. [2025-02-07 17:25:20,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2025-02-07 17:25:20,742 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 11 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) Word has length 13 [2025-02-07 17:25:20,742 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-07 17:25:20,743 INFO L225 Difference]: With dead ends: 26 [2025-02-07 17:25:20,743 INFO L226 Difference]: Without dead ends: 23 [2025-02-07 17:25:20,743 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 18 SyntacticMatches, 4 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=62, Invalid=148, Unknown=0, NotChecked=0, Total=210 [2025-02-07 17:25:20,743 INFO L435 NwaCegarLoop]: 6 mSDtfsCounter, 22 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 98 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 20 SdHoareTripleChecker+Invalid, 107 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 98 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-02-07 17:25:20,743 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 20 Invalid, 107 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 98 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-02-07 17:25:20,744 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2025-02-07 17:25:20,747 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 16. [2025-02-07 17:25:20,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 15 states have (on average 1.2) internal successors, (18), 15 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-07 17:25:20,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 18 transitions. [2025-02-07 17:25:20,748 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 18 transitions. Word has length 13 [2025-02-07 17:25:20,748 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-07 17:25:20,748 INFO L471 AbstractCegarLoop]: Abstraction has 16 states and 18 transitions. [2025-02-07 17:25:20,748 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 11 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) [2025-02-07 17:25:20,748 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 18 transitions. [2025-02-07 17:25:20,748 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2025-02-07 17:25:20,748 INFO L210 NwaCegarLoop]: Found error trace [2025-02-07 17:25:20,748 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-07 17:25:20,756 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2025-02-07 17:25:20,949 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 [2025-02-07 17:25:20,949 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-07 17:25:20,950 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-07 17:25:20,950 INFO L85 PathProgramCache]: Analyzing trace with hash 651473994, now seen corresponding path program 3 times [2025-02-07 17:25:20,950 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-07 17:25:20,950 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1094030968] [2025-02-07 17:25:20,950 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-02-07 17:25:20,950 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-07 17:25:20,958 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 15 statements into 3 equivalence classes. [2025-02-07 17:25:20,976 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) and asserted 15 of 15 statements. [2025-02-07 17:25:20,977 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2025-02-07 17:25:20,978 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 17:25:21,018 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-07 17:25:21,018 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-07 17:25:21,018 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1094030968] [2025-02-07 17:25:21,018 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1094030968] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-07 17:25:21,019 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [122408895] [2025-02-07 17:25:21,019 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-02-07 17:25:21,019 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-07 17:25:21,019 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-07 17:25:21,020 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-07 17:25:21,024 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2025-02-07 17:25:21,055 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 15 statements into 3 equivalence classes. [2025-02-07 17:25:21,069 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) and asserted 15 of 15 statements. [2025-02-07 17:25:21,069 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2025-02-07 17:25:21,070 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 17:25:21,070 INFO L256 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 6 conjuncts are in the unsatisfiable core [2025-02-07 17:25:21,071 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-07 17:25:21,105 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-07 17:25:21,106 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-07 17:25:21,130 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-07 17:25:21,131 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [122408895] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-07 17:25:21,131 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-07 17:25:21,131 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 10 [2025-02-07 17:25:21,131 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [594898100] [2025-02-07 17:25:21,131 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-07 17:25:21,131 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2025-02-07 17:25:21,131 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-07 17:25:21,131 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2025-02-07 17:25:21,132 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2025-02-07 17:25:21,132 INFO L87 Difference]: Start difference. First operand 16 states and 18 transitions. Second operand has 10 states, 10 states have (on average 2.6) internal successors, (26), 10 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-07 17:25:21,171 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-07 17:25:21,171 INFO L93 Difference]: Finished difference Result 29 states and 34 transitions. [2025-02-07 17:25:21,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2025-02-07 17:25:21,172 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.6) internal successors, (26), 10 states have internal predecessors, (26), 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 [2025-02-07 17:25:21,172 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-07 17:25:21,172 INFO L225 Difference]: With dead ends: 29 [2025-02-07 17:25:21,172 INFO L226 Difference]: Without dead ends: 19 [2025-02-07 17:25:21,172 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2025-02-07 17:25:21,173 INFO L435 NwaCegarLoop]: 7 mSDtfsCounter, 7 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 14 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-02-07 17:25:21,173 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 14 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-02-07 17:25:21,173 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2025-02-07 17:25:21,175 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 17. [2025-02-07 17:25:21,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 16 states have (on average 1.1875) internal successors, (19), 16 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-07 17:25:21,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 19 transitions. [2025-02-07 17:25:21,176 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 19 transitions. Word has length 15 [2025-02-07 17:25:21,176 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-07 17:25:21,176 INFO L471 AbstractCegarLoop]: Abstraction has 17 states and 19 transitions. [2025-02-07 17:25:21,176 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.6) internal successors, (26), 10 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-07 17:25:21,176 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 19 transitions. [2025-02-07 17:25:21,176 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2025-02-07 17:25:21,176 INFO L210 NwaCegarLoop]: Found error trace [2025-02-07 17:25:21,176 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-07 17:25:21,182 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2025-02-07 17:25:21,377 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 [2025-02-07 17:25:21,377 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-07 17:25:21,377 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-07 17:25:21,378 INFO L85 PathProgramCache]: Analyzing trace with hash 840931000, now seen corresponding path program 4 times [2025-02-07 17:25:21,379 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-07 17:25:21,379 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1395639434] [2025-02-07 17:25:21,379 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-02-07 17:25:21,379 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-07 17:25:21,398 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 16 statements into 2 equivalence classes. [2025-02-07 17:25:21,410 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 16 of 16 statements. [2025-02-07 17:25:21,410 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-02-07 17:25:21,411 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 17:25:21,739 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-07 17:25:21,739 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-07 17:25:21,739 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1395639434] [2025-02-07 17:25:21,739 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1395639434] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-07 17:25:21,739 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [334272110] [2025-02-07 17:25:21,739 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-02-07 17:25:21,739 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-07 17:25:21,739 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-07 17:25:21,745 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-07 17:25:21,746 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2025-02-07 17:25:21,783 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 16 statements into 2 equivalence classes. [2025-02-07 17:25:21,799 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 16 of 16 statements. [2025-02-07 17:25:21,799 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-02-07 17:25:21,799 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 17:25:21,800 INFO L256 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 33 conjuncts are in the unsatisfiable core [2025-02-07 17:25:21,802 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-07 17:25:21,806 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2025-02-07 17:25:21,874 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 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 19 treesize of output 11 [2025-02-07 17:25:22,008 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 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 19 treesize of output 11 [2025-02-07 17:25:22,019 INFO L349 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2025-02-07 17:25:22,019 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 7 [2025-02-07 17:25:22,069 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-07 17:25:22,070 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-07 17:25:22,247 INFO L349 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2025-02-07 17:25:22,248 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 9 [2025-02-07 17:25:22,431 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-07 17:25:22,431 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [334272110] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-07 17:25:22,431 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-07 17:25:22,431 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 27 [2025-02-07 17:25:22,431 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1276246880] [2025-02-07 17:25:22,431 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-07 17:25:22,432 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2025-02-07 17:25:22,432 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-07 17:25:22,432 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2025-02-07 17:25:22,433 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=608, Unknown=0, NotChecked=0, Total=702 [2025-02-07 17:25:22,433 INFO L87 Difference]: Start difference. First operand 17 states and 19 transitions. Second operand has 27 states, 27 states have (on average 1.2592592592592593) internal successors, (34), 27 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-07 17:25:23,186 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-07 17:25:23,186 INFO L93 Difference]: Finished difference Result 46 states and 61 transitions. [2025-02-07 17:25:23,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2025-02-07 17:25:23,186 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.2592592592592593) internal successors, (34), 27 states have internal predecessors, (34), 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 16 [2025-02-07 17:25:23,187 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-07 17:25:23,188 INFO L225 Difference]: With dead ends: 46 [2025-02-07 17:25:23,189 INFO L226 Difference]: Without dead ends: 39 [2025-02-07 17:25:23,190 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 438 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=294, Invalid=1598, Unknown=0, NotChecked=0, Total=1892 [2025-02-07 17:25:23,190 INFO L435 NwaCegarLoop]: 6 mSDtfsCounter, 16 mSDsluCounter, 45 mSDsCounter, 0 mSdLazyCounter, 269 mSolverCounterSat, 58 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 51 SdHoareTripleChecker+Invalid, 327 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 58 IncrementalHoareTripleChecker+Valid, 269 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2025-02-07 17:25:23,191 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 51 Invalid, 327 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [58 Valid, 269 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2025-02-07 17:25:23,191 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2025-02-07 17:25:23,195 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 32. [2025-02-07 17:25:23,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 31 states have (on average 1.2903225806451613) internal successors, (40), 31 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-07 17:25:23,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 40 transitions. [2025-02-07 17:25:23,196 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 40 transitions. Word has length 16 [2025-02-07 17:25:23,196 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-07 17:25:23,196 INFO L471 AbstractCegarLoop]: Abstraction has 32 states and 40 transitions. [2025-02-07 17:25:23,196 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.2592592592592593) internal successors, (34), 27 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-07 17:25:23,196 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 40 transitions. [2025-02-07 17:25:23,197 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2025-02-07 17:25:23,197 INFO L210 NwaCegarLoop]: Found error trace [2025-02-07 17:25:23,197 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-07 17:25:23,203 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2025-02-07 17:25:23,401 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-07 17:25:23,401 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-07 17:25:23,401 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-07 17:25:23,401 INFO L85 PathProgramCache]: Analyzing trace with hash 841854521, now seen corresponding path program 1 times [2025-02-07 17:25:23,401 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-07 17:25:23,401 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1775305024] [2025-02-07 17:25:23,401 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-07 17:25:23,401 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-07 17:25:23,409 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 16 statements into 1 equivalence classes. [2025-02-07 17:25:23,421 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 16 of 16 statements. [2025-02-07 17:25:23,423 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-07 17:25:23,423 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 17:25:23,572 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-07 17:25:23,572 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-07 17:25:23,572 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1775305024] [2025-02-07 17:25:23,572 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1775305024] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-07 17:25:23,572 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [820712159] [2025-02-07 17:25:23,572 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-07 17:25:23,573 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-07 17:25:23,573 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-07 17:25:23,577 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-07 17:25:23,580 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2025-02-07 17:25:23,610 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 16 statements into 1 equivalence classes. [2025-02-07 17:25:23,621 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 16 of 16 statements. [2025-02-07 17:25:23,621 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-07 17:25:23,621 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 17:25:23,622 INFO L256 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 15 conjuncts are in the unsatisfiable core [2025-02-07 17:25:23,623 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-07 17:25:23,634 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2025-02-07 17:25:23,658 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-07 17:25:23,659 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-07 17:25:23,688 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 16 treesize of output 14 [2025-02-07 17:25:23,690 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2025-02-07 17:25:23,706 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-07 17:25:23,706 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [820712159] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-07 17:25:23,706 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-07 17:25:23,706 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 14 [2025-02-07 17:25:23,706 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1434131521] [2025-02-07 17:25:23,706 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-07 17:25:23,706 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2025-02-07 17:25:23,706 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-07 17:25:23,707 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2025-02-07 17:25:23,707 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2025-02-07 17:25:23,707 INFO L87 Difference]: Start difference. First operand 32 states and 40 transitions. Second operand has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-07 17:25:23,770 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-07 17:25:23,770 INFO L93 Difference]: Finished difference Result 54 states and 68 transitions. [2025-02-07 17:25:23,770 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2025-02-07 17:25:23,771 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 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 16 [2025-02-07 17:25:23,771 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-07 17:25:23,771 INFO L225 Difference]: With dead ends: 54 [2025-02-07 17:25:23,771 INFO L226 Difference]: Without dead ends: 37 [2025-02-07 17:25:23,771 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=51, Invalid=159, Unknown=0, NotChecked=0, Total=210 [2025-02-07 17:25:23,772 INFO L435 NwaCegarLoop]: 8 mSDtfsCounter, 15 mSDsluCounter, 41 mSDsCounter, 0 mSdLazyCounter, 109 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 110 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 109 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-02-07 17:25:23,772 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 49 Invalid, 110 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 109 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-02-07 17:25:23,772 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2025-02-07 17:25:23,776 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 35. [2025-02-07 17:25:23,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 34 states have (on average 1.2352941176470589) internal successors, (42), 34 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-07 17:25:23,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 42 transitions. [2025-02-07 17:25:23,776 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 42 transitions. Word has length 16 [2025-02-07 17:25:23,776 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-07 17:25:23,776 INFO L471 AbstractCegarLoop]: Abstraction has 35 states and 42 transitions. [2025-02-07 17:25:23,777 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-07 17:25:23,777 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 42 transitions. [2025-02-07 17:25:23,777 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2025-02-07 17:25:23,777 INFO L210 NwaCegarLoop]: Found error trace [2025-02-07 17:25:23,777 INFO L218 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-07 17:25:23,784 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2025-02-07 17:25:23,977 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2025-02-07 17:25:23,978 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-07 17:25:23,978 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-07 17:25:23,978 INFO L85 PathProgramCache]: Analyzing trace with hash -1875836406, now seen corresponding path program 5 times [2025-02-07 17:25:23,979 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-07 17:25:23,979 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2137065295] [2025-02-07 17:25:23,979 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-02-07 17:25:23,979 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-07 17:25:23,984 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 17 statements into 3 equivalence classes. [2025-02-07 17:25:23,989 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) and asserted 17 of 17 statements. [2025-02-07 17:25:23,989 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2025-02-07 17:25:23,990 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 17:25:24,040 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 3 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-07 17:25:24,040 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-07 17:25:24,040 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2137065295] [2025-02-07 17:25:24,040 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2137065295] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-07 17:25:24,040 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [94245793] [2025-02-07 17:25:24,040 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-02-07 17:25:24,040 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-07 17:25:24,040 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-07 17:25:24,042 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-07 17:25:24,044 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2025-02-07 17:25:24,075 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 17 statements into 3 equivalence classes. [2025-02-07 17:25:24,088 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) and asserted 17 of 17 statements. [2025-02-07 17:25:24,088 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2025-02-07 17:25:24,088 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 17:25:24,089 INFO L256 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 8 conjuncts are in the unsatisfiable core [2025-02-07 17:25:24,091 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-07 17:25:24,152 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 3 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-07 17:25:24,153 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-07 17:25:24,197 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 3 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-07 17:25:24,197 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [94245793] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-07 17:25:24,199 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-07 17:25:24,199 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 12 [2025-02-07 17:25:24,200 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [216014434] [2025-02-07 17:25:24,200 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-07 17:25:24,200 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2025-02-07 17:25:24,200 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-07 17:25:24,200 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2025-02-07 17:25:24,200 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2025-02-07 17:25:24,201 INFO L87 Difference]: Start difference. First operand 35 states and 42 transitions. Second operand has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-07 17:25:24,346 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-07 17:25:24,346 INFO L93 Difference]: Finished difference Result 44 states and 52 transitions. [2025-02-07 17:25:24,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2025-02-07 17:25:24,347 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 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 17 [2025-02-07 17:25:24,347 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-07 17:25:24,347 INFO L225 Difference]: With dead ends: 44 [2025-02-07 17:25:24,347 INFO L226 Difference]: Without dead ends: 41 [2025-02-07 17:25:24,347 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 24 SyntacticMatches, 7 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=99, Invalid=243, Unknown=0, NotChecked=0, Total=342 [2025-02-07 17:25:24,348 INFO L435 NwaCegarLoop]: 6 mSDtfsCounter, 20 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 178 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 184 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 178 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-02-07 17:25:24,348 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 30 Invalid, 184 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 178 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-02-07 17:25:24,348 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2025-02-07 17:25:24,362 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 35. [2025-02-07 17:25:24,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 34 states have (on average 1.2352941176470589) internal successors, (42), 34 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-07 17:25:24,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 42 transitions. [2025-02-07 17:25:24,363 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 42 transitions. Word has length 17 [2025-02-07 17:25:24,363 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-07 17:25:24,363 INFO L471 AbstractCegarLoop]: Abstraction has 35 states and 42 transitions. [2025-02-07 17:25:24,363 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-07 17:25:24,363 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 42 transitions. [2025-02-07 17:25:24,365 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2025-02-07 17:25:24,365 INFO L210 NwaCegarLoop]: Found error trace [2025-02-07 17:25:24,365 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-07 17:25:24,374 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2025-02-07 17:25:24,565 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-07 17:25:24,565 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-07 17:25:24,566 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-07 17:25:24,566 INFO L85 PathProgramCache]: Analyzing trace with hash -249555316, now seen corresponding path program 2 times [2025-02-07 17:25:24,566 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-07 17:25:24,566 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2127961939] [2025-02-07 17:25:24,566 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-07 17:25:24,567 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-07 17:25:24,581 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 19 statements into 2 equivalence classes. [2025-02-07 17:25:24,592 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 19 of 19 statements. [2025-02-07 17:25:24,592 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-02-07 17:25:24,592 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 17:25:24,666 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 8 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-07 17:25:24,666 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-07 17:25:24,666 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2127961939] [2025-02-07 17:25:24,666 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2127961939] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-07 17:25:24,666 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1685237412] [2025-02-07 17:25:24,666 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-07 17:25:24,666 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-07 17:25:24,666 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-07 17:25:24,674 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-07 17:25:24,675 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2025-02-07 17:25:24,717 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 19 statements into 2 equivalence classes. [2025-02-07 17:25:24,730 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 19 of 19 statements. [2025-02-07 17:25:24,730 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-02-07 17:25:24,730 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 17:25:24,735 INFO L256 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 8 conjuncts are in the unsatisfiable core [2025-02-07 17:25:24,736 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-07 17:25:24,784 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 12 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-07 17:25:24,784 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-07 17:25:24,812 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 12 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-07 17:25:24,812 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1685237412] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-07 17:25:24,812 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-07 17:25:24,813 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 13 [2025-02-07 17:25:24,813 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [978271593] [2025-02-07 17:25:24,813 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-07 17:25:24,813 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2025-02-07 17:25:24,813 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-07 17:25:24,813 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2025-02-07 17:25:24,813 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=109, Unknown=0, NotChecked=0, Total=156 [2025-02-07 17:25:24,814 INFO L87 Difference]: Start difference. First operand 35 states and 42 transitions. Second operand has 13 states, 13 states have (on average 2.5384615384615383) internal successors, (33), 13 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) [2025-02-07 17:25:24,872 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-07 17:25:24,872 INFO L93 Difference]: Finished difference Result 47 states and 56 transitions. [2025-02-07 17:25:24,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2025-02-07 17:25:24,873 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.5384615384615383) internal successors, (33), 13 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) Word has length 19 [2025-02-07 17:25:24,873 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-07 17:25:24,873 INFO L225 Difference]: With dead ends: 47 [2025-02-07 17:25:24,873 INFO L226 Difference]: Without dead ends: 23 [2025-02-07 17:25:24,873 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 29 SyntacticMatches, 4 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=64, Invalid=146, Unknown=0, NotChecked=0, Total=210 [2025-02-07 17:25:24,873 INFO L435 NwaCegarLoop]: 7 mSDtfsCounter, 17 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 66 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 20 SdHoareTripleChecker+Invalid, 75 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 66 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-02-07 17:25:24,874 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 20 Invalid, 75 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 66 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-02-07 17:25:24,874 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2025-02-07 17:25:24,876 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 21. [2025-02-07 17:25:24,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 20 states have (on average 1.15) internal successors, (23), 20 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-07 17:25:24,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 23 transitions. [2025-02-07 17:25:24,877 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 23 transitions. Word has length 19 [2025-02-07 17:25:24,877 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-07 17:25:24,877 INFO L471 AbstractCegarLoop]: Abstraction has 21 states and 23 transitions. [2025-02-07 17:25:24,877 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.5384615384615383) internal successors, (33), 13 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) [2025-02-07 17:25:24,877 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 23 transitions. [2025-02-07 17:25:24,877 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2025-02-07 17:25:24,877 INFO L210 NwaCegarLoop]: Found error trace [2025-02-07 17:25:24,877 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-07 17:25:24,883 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2025-02-07 17:25:25,078 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,9 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-07 17:25:25,078 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-07 17:25:25,079 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-07 17:25:25,079 INFO L85 PathProgramCache]: Analyzing trace with hash -1104545159, now seen corresponding path program 6 times [2025-02-07 17:25:25,079 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-07 17:25:25,079 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [538284961] [2025-02-07 17:25:25,079 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-02-07 17:25:25,079 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-07 17:25:25,084 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 20 statements into 4 equivalence classes. [2025-02-07 17:25:25,105 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) and asserted 20 of 20 statements. [2025-02-07 17:25:25,106 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2025-02-07 17:25:25,106 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 17:25:25,525 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-07 17:25:25,525 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-07 17:25:25,525 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [538284961] [2025-02-07 17:25:25,525 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [538284961] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-07 17:25:25,525 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1823402544] [2025-02-07 17:25:25,525 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-02-07 17:25:25,525 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-07 17:25:25,525 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-07 17:25:25,528 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-07 17:25:25,533 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2025-02-07 17:25:25,574 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 20 statements into 4 equivalence classes. [2025-02-07 17:25:25,591 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) and asserted 20 of 20 statements. [2025-02-07 17:25:25,591 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2025-02-07 17:25:25,591 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 17:25:25,592 INFO L256 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 40 conjuncts are in the unsatisfiable core [2025-02-07 17:25:25,597 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-07 17:25:25,605 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2025-02-07 17:25:25,729 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 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 19 treesize of output 11 [2025-02-07 17:25:25,844 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 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 19 treesize of output 11 [2025-02-07 17:25:25,995 INFO L349 Elim1Store]: treesize reduction 24, result has 4.0 percent of original size [2025-02-07 17:25:25,996 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 34 treesize of output 10 [2025-02-07 17:25:25,999 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 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 19 treesize of output 11 [2025-02-07 17:25:26,092 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-07 17:25:26,092 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-07 17:25:26,564 INFO L349 Elim1Store]: treesize reduction 24, result has 4.0 percent of original size [2025-02-07 17:25:26,565 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 37 treesize of output 13 [2025-02-07 17:25:26,779 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-07 17:25:26,780 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1823402544] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-07 17:25:26,780 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-07 17:25:26,780 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17, 17] total 45 [2025-02-07 17:25:26,780 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [603359191] [2025-02-07 17:25:26,780 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-07 17:25:26,780 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2025-02-07 17:25:26,780 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-07 17:25:26,781 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2025-02-07 17:25:26,782 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=203, Invalid=1777, Unknown=0, NotChecked=0, Total=1980 [2025-02-07 17:25:26,782 INFO L87 Difference]: Start difference. First operand 21 states and 23 transitions. Second operand has 45 states, 45 states have (on average 1.1333333333333333) internal successors, (51), 45 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) [2025-02-07 17:25:27,564 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-07 17:25:27,565 INFO L93 Difference]: Finished difference Result 42 states and 50 transitions. [2025-02-07 17:25:27,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2025-02-07 17:25:27,565 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 1.1333333333333333) internal successors, (51), 45 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) Word has length 20 [2025-02-07 17:25:27,565 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-07 17:25:27,566 INFO L225 Difference]: With dead ends: 42 [2025-02-07 17:25:27,566 INFO L226 Difference]: Without dead ends: 39 [2025-02-07 17:25:27,567 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 807 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=397, Invalid=3143, Unknown=0, NotChecked=0, Total=3540 [2025-02-07 17:25:27,567 INFO L435 NwaCegarLoop]: 6 mSDtfsCounter, 10 mSDsluCounter, 70 mSDsCounter, 0 mSdLazyCounter, 484 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 76 SdHoareTripleChecker+Invalid, 498 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 484 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2025-02-07 17:25:27,567 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 76 Invalid, 498 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 484 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2025-02-07 17:25:27,568 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2025-02-07 17:25:27,574 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 24. [2025-02-07 17:25:27,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 23 states have (on average 1.173913043478261) internal successors, (27), 23 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-07 17:25:27,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 27 transitions. [2025-02-07 17:25:27,575 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 27 transitions. Word has length 20 [2025-02-07 17:25:27,575 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-07 17:25:27,575 INFO L471 AbstractCegarLoop]: Abstraction has 24 states and 27 transitions. [2025-02-07 17:25:27,575 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 1.1333333333333333) internal successors, (51), 45 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) [2025-02-07 17:25:27,576 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 27 transitions. [2025-02-07 17:25:27,576 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2025-02-07 17:25:27,576 INFO L210 NwaCegarLoop]: Found error trace [2025-02-07 17:25:27,576 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-07 17:25:27,583 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2025-02-07 17:25:27,777 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-07 17:25:27,777 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-07 17:25:27,778 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-07 17:25:27,778 INFO L85 PathProgramCache]: Analyzing trace with hash -1103621638, now seen corresponding path program 3 times [2025-02-07 17:25:27,778 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-07 17:25:27,778 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2088755032] [2025-02-07 17:25:27,778 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-02-07 17:25:27,778 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-07 17:25:27,784 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 20 statements into 4 equivalence classes. [2025-02-07 17:25:27,801 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) and asserted 17 of 20 statements. [2025-02-07 17:25:27,802 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2025-02-07 17:25:27,802 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 17:25:27,967 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 12 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2025-02-07 17:25:27,967 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-07 17:25:27,968 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2088755032] [2025-02-07 17:25:27,968 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2088755032] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-07 17:25:27,968 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1988600472] [2025-02-07 17:25:27,968 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-02-07 17:25:27,968 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-07 17:25:27,968 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-07 17:25:27,970 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-07 17:25:27,971 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2025-02-07 17:25:28,008 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 20 statements into 4 equivalence classes. [2025-02-07 17:25:28,028 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) and asserted 17 of 20 statements. [2025-02-07 17:25:28,029 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2025-02-07 17:25:28,029 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 17:25:28,029 INFO L256 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 11 conjuncts are in the unsatisfiable core [2025-02-07 17:25:28,031 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-07 17:25:28,035 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2025-02-07 17:25:28,075 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-02-07 17:25:28,075 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 17 [2025-02-07 17:25:28,104 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 7 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2025-02-07 17:25:28,104 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-07 17:25:28,164 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 7 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2025-02-07 17:25:28,164 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1988600472] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-07 17:25:28,164 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-07 17:25:28,164 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 7, 7] total 15 [2025-02-07 17:25:28,164 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1654212282] [2025-02-07 17:25:28,164 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-07 17:25:28,164 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2025-02-07 17:25:28,164 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-07 17:25:28,164 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2025-02-07 17:25:28,165 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2025-02-07 17:25:28,165 INFO L87 Difference]: Start difference. First operand 24 states and 27 transitions. Second operand has 15 states, 15 states have (on average 2.066666666666667) internal successors, (31), 15 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-07 17:25:28,360 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-07 17:25:28,361 INFO L93 Difference]: Finished difference Result 29 states and 32 transitions. [2025-02-07 17:25:28,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2025-02-07 17:25:28,361 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.066666666666667) internal successors, (31), 15 states have internal predecessors, (31), 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 20 [2025-02-07 17:25:28,361 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-07 17:25:28,361 INFO L225 Difference]: With dead ends: 29 [2025-02-07 17:25:28,361 INFO L226 Difference]: Without dead ends: 26 [2025-02-07 17:25:28,362 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 33 SyntacticMatches, 3 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=152, Invalid=354, Unknown=0, NotChecked=0, Total=506 [2025-02-07 17:25:28,362 INFO L435 NwaCegarLoop]: 6 mSDtfsCounter, 20 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 62 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 70 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 62 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-02-07 17:25:28,362 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 21 Invalid, 70 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 62 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-02-07 17:25:28,362 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2025-02-07 17:25:28,365 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 24. [2025-02-07 17:25:28,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 23 states have (on average 1.173913043478261) internal successors, (27), 23 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-07 17:25:28,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 27 transitions. [2025-02-07 17:25:28,366 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 27 transitions. Word has length 20 [2025-02-07 17:25:28,366 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-07 17:25:28,366 INFO L471 AbstractCegarLoop]: Abstraction has 24 states and 27 transitions. [2025-02-07 17:25:28,366 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.066666666666667) internal successors, (31), 15 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-07 17:25:28,366 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 27 transitions. [2025-02-07 17:25:28,366 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2025-02-07 17:25:28,367 INFO L210 NwaCegarLoop]: Found error trace [2025-02-07 17:25:28,367 INFO L218 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-07 17:25:28,373 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2025-02-07 17:25:28,571 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2025-02-07 17:25:28,571 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-07 17:25:28,572 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-07 17:25:28,572 INFO L85 PathProgramCache]: Analyzing trace with hash -1642039382, now seen corresponding path program 7 times [2025-02-07 17:25:28,572 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-07 17:25:28,572 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1789097368] [2025-02-07 17:25:28,572 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-02-07 17:25:28,572 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-07 17:25:28,577 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 23 statements into 1 equivalence classes. [2025-02-07 17:25:28,580 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 23 of 23 statements. [2025-02-07 17:25:28,580 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-07 17:25:28,581 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 17:25:28,675 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 15 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-07 17:25:28,676 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-07 17:25:28,676 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1789097368] [2025-02-07 17:25:28,676 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1789097368] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-07 17:25:28,676 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [124996818] [2025-02-07 17:25:28,676 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-02-07 17:25:28,676 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-07 17:25:28,676 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-07 17:25:28,678 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-07 17:25:28,680 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2025-02-07 17:25:28,725 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 23 statements into 1 equivalence classes. [2025-02-07 17:25:28,738 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 23 of 23 statements. [2025-02-07 17:25:28,738 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-07 17:25:28,738 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 17:25:28,739 INFO L256 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 10 conjuncts are in the unsatisfiable core [2025-02-07 17:25:28,739 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-07 17:25:28,844 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 22 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-07 17:25:28,845 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-07 17:25:28,924 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 22 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-07 17:25:28,924 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [124996818] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-07 17:25:28,924 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-07 17:25:28,924 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 16 [2025-02-07 17:25:28,925 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1870046411] [2025-02-07 17:25:28,925 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-07 17:25:28,925 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2025-02-07 17:25:28,925 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-07 17:25:28,926 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2025-02-07 17:25:28,926 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=172, Unknown=0, NotChecked=0, Total=240 [2025-02-07 17:25:28,926 INFO L87 Difference]: Start difference. First operand 24 states and 27 transitions. Second operand has 16 states, 16 states have (on average 2.5) internal successors, (40), 16 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-07 17:25:29,051 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-07 17:25:29,052 INFO L93 Difference]: Finished difference Result 48 states and 55 transitions. [2025-02-07 17:25:29,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2025-02-07 17:25:29,052 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.5) internal successors, (40), 16 states have internal predecessors, (40), 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 [2025-02-07 17:25:29,052 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-07 17:25:29,052 INFO L225 Difference]: With dead ends: 48 [2025-02-07 17:25:29,053 INFO L226 Difference]: Without dead ends: 30 [2025-02-07 17:25:29,053 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 34 SyntacticMatches, 6 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 132 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=98, Invalid=244, Unknown=0, NotChecked=0, Total=342 [2025-02-07 17:25:29,054 INFO L435 NwaCegarLoop]: 7 mSDtfsCounter, 32 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 89 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 20 SdHoareTripleChecker+Invalid, 102 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 89 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-02-07 17:25:29,054 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [32 Valid, 20 Invalid, 102 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 89 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-02-07 17:25:29,054 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2025-02-07 17:25:29,059 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 25. [2025-02-07 17:25:29,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 24 states have (on average 1.1666666666666667) internal successors, (28), 24 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) [2025-02-07 17:25:29,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 28 transitions. [2025-02-07 17:25:29,060 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 28 transitions. Word has length 23 [2025-02-07 17:25:29,061 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-07 17:25:29,061 INFO L471 AbstractCegarLoop]: Abstraction has 25 states and 28 transitions. [2025-02-07 17:25:29,061 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.5) internal successors, (40), 16 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-07 17:25:29,061 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 28 transitions. [2025-02-07 17:25:29,061 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2025-02-07 17:25:29,061 INFO L210 NwaCegarLoop]: Found error trace [2025-02-07 17:25:29,061 INFO L218 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-07 17:25:29,070 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2025-02-07 17:25:29,262 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2025-02-07 17:25:29,262 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-07 17:25:29,263 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-07 17:25:29,263 INFO L85 PathProgramCache]: Analyzing trace with hash -556725224, now seen corresponding path program 8 times [2025-02-07 17:25:29,263 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-07 17:25:29,263 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1890259900] [2025-02-07 17:25:29,264 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-07 17:25:29,264 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-07 17:25:29,271 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 24 statements into 2 equivalence classes. [2025-02-07 17:25:29,280 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 24 of 24 statements. [2025-02-07 17:25:29,281 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-02-07 17:25:29,281 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 17:25:29,787 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-07 17:25:29,787 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-07 17:25:29,787 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1890259900] [2025-02-07 17:25:29,787 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1890259900] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-07 17:25:29,787 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [335840063] [2025-02-07 17:25:29,787 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-07 17:25:29,787 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-07 17:25:29,787 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-07 17:25:29,793 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-07 17:25:29,795 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2025-02-07 17:25:29,839 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 24 statements into 2 equivalence classes. [2025-02-07 17:25:29,855 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 24 of 24 statements. [2025-02-07 17:25:29,855 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-02-07 17:25:29,856 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 17:25:29,857 INFO L256 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 58 conjuncts are in the unsatisfiable core [2025-02-07 17:25:29,859 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-07 17:25:29,949 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2025-02-07 17:25:30,136 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 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 19 treesize of output 11 [2025-02-07 17:25:30,214 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 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 19 treesize of output 11 [2025-02-07 17:25:30,300 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 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 19 treesize of output 11 [2025-02-07 17:25:30,426 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 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 19 treesize of output 11 [2025-02-07 17:25:30,474 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-07 17:25:30,474 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-07 17:25:31,071 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-07 17:25:31,071 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [335840063] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-07 17:25:31,071 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-07 17:25:31,071 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 19, 17] total 50 [2025-02-07 17:25:31,072 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2128664227] [2025-02-07 17:25:31,072 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-07 17:25:31,072 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2025-02-07 17:25:31,072 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-07 17:25:31,072 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2025-02-07 17:25:31,073 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=194, Invalid=2256, Unknown=0, NotChecked=0, Total=2450 [2025-02-07 17:25:31,073 INFO L87 Difference]: Start difference. First operand 25 states and 28 transitions. Second operand has 50 states, 50 states have (on average 1.26) internal successors, (63), 50 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-07 17:25:31,955 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-07 17:25:31,955 INFO L93 Difference]: Finished difference Result 48 states and 55 transitions. [2025-02-07 17:25:31,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2025-02-07 17:25:31,955 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 1.26) internal successors, (63), 50 states have internal predecessors, (63), 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 [2025-02-07 17:25:31,956 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-07 17:25:31,956 INFO L225 Difference]: With dead ends: 48 [2025-02-07 17:25:31,956 INFO L226 Difference]: Without dead ends: 45 [2025-02-07 17:25:31,957 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1145 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=375, Invalid=3915, Unknown=0, NotChecked=0, Total=4290 [2025-02-07 17:25:31,962 INFO L435 NwaCegarLoop]: 4 mSDtfsCounter, 18 mSDsluCounter, 60 mSDsCounter, 0 mSdLazyCounter, 832 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 64 SdHoareTripleChecker+Invalid, 863 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 832 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2025-02-07 17:25:31,962 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 64 Invalid, 863 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 832 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2025-02-07 17:25:31,962 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2025-02-07 17:25:31,975 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 34. [2025-02-07 17:25:31,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 33 states have (on average 1.1818181818181819) internal successors, (39), 33 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-07 17:25:31,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 39 transitions. [2025-02-07 17:25:31,977 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 39 transitions. Word has length 24 [2025-02-07 17:25:31,978 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-07 17:25:31,978 INFO L471 AbstractCegarLoop]: Abstraction has 34 states and 39 transitions. [2025-02-07 17:25:31,978 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 1.26) internal successors, (63), 50 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-07 17:25:31,979 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 39 transitions. [2025-02-07 17:25:31,979 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2025-02-07 17:25:31,979 INFO L210 NwaCegarLoop]: Found error trace [2025-02-07 17:25:31,980 INFO L218 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-07 17:25:31,985 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2025-02-07 17:25:32,181 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,13 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-07 17:25:32,182 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-07 17:25:32,182 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-07 17:25:32,182 INFO L85 PathProgramCache]: Analyzing trace with hash 1186085111, now seen corresponding path program 4 times [2025-02-07 17:25:32,182 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-07 17:25:32,182 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1471044700] [2025-02-07 17:25:32,182 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-02-07 17:25:32,182 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-07 17:25:32,189 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 24 statements into 2 equivalence classes. [2025-02-07 17:25:32,195 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) and asserted 21 of 24 statements. [2025-02-07 17:25:32,195 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) [2025-02-07 17:25:32,195 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 17:25:32,402 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 6 proven. 20 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-02-07 17:25:32,403 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-07 17:25:32,403 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1471044700] [2025-02-07 17:25:32,403 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1471044700] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-07 17:25:32,403 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1784891155] [2025-02-07 17:25:32,403 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-02-07 17:25:32,403 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-07 17:25:32,403 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-07 17:25:32,409 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-07 17:25:32,410 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2025-02-07 17:25:32,454 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 24 statements into 2 equivalence classes. [2025-02-07 17:25:32,463 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) and asserted 21 of 24 statements. [2025-02-07 17:25:32,463 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) [2025-02-07 17:25:32,463 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 17:25:32,464 INFO L256 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 17 conjuncts are in the unsatisfiable core [2025-02-07 17:25:32,465 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-07 17:25:32,469 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 16 treesize of output 12 [2025-02-07 17:25:32,480 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 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 28 treesize of output 27 [2025-02-07 17:25:32,547 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-02-07 17:25:32,548 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 36 treesize of output 30 [2025-02-07 17:25:32,601 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 6 proven. 18 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2025-02-07 17:25:32,601 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-07 17:25:32,648 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 6 proven. 18 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2025-02-07 17:25:32,648 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1784891155] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-07 17:25:32,648 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-07 17:25:32,648 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 17 [2025-02-07 17:25:32,648 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [951287316] [2025-02-07 17:25:32,648 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-07 17:25:32,649 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2025-02-07 17:25:32,649 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-07 17:25:32,649 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2025-02-07 17:25:32,649 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272 [2025-02-07 17:25:32,649 INFO L87 Difference]: Start difference. First operand 34 states and 39 transitions. Second operand has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 17 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) [2025-02-07 17:25:32,838 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-07 17:25:32,838 INFO L93 Difference]: Finished difference Result 42 states and 48 transitions. [2025-02-07 17:25:32,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2025-02-07 17:25:32,839 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 17 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) Word has length 24 [2025-02-07 17:25:32,839 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-07 17:25:32,839 INFO L225 Difference]: With dead ends: 42 [2025-02-07 17:25:32,839 INFO L226 Difference]: Without dead ends: 39 [2025-02-07 17:25:32,839 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 39 SyntacticMatches, 3 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 114 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=145, Invalid=407, Unknown=0, NotChecked=0, Total=552 [2025-02-07 17:25:32,840 INFO L435 NwaCegarLoop]: 7 mSDtfsCounter, 9 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 112 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 119 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 112 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-02-07 17:25:32,840 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 33 Invalid, 119 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 112 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-02-07 17:25:32,840 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2025-02-07 17:25:32,846 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 34. [2025-02-07 17:25:32,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 33 states have (on average 1.1818181818181819) internal successors, (39), 33 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-07 17:25:32,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 39 transitions. [2025-02-07 17:25:32,847 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 39 transitions. Word has length 24 [2025-02-07 17:25:32,847 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-07 17:25:32,847 INFO L471 AbstractCegarLoop]: Abstraction has 34 states and 39 transitions. [2025-02-07 17:25:32,847 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 17 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) [2025-02-07 17:25:32,847 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 39 transitions. [2025-02-07 17:25:32,847 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2025-02-07 17:25:32,847 INFO L210 NwaCegarLoop]: Found error trace [2025-02-07 17:25:32,847 INFO L218 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-07 17:25:32,858 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2025-02-07 17:25:33,047 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,14 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-07 17:25:33,048 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-07 17:25:33,048 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-07 17:25:33,048 INFO L85 PathProgramCache]: Analyzing trace with hash -1271724694, now seen corresponding path program 9 times [2025-02-07 17:25:33,048 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-07 17:25:33,048 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [659434756] [2025-02-07 17:25:33,048 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-02-07 17:25:33,048 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-07 17:25:33,053 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 25 statements into 5 equivalence classes. [2025-02-07 17:25:33,062 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) and asserted 25 of 25 statements. [2025-02-07 17:25:33,063 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2025-02-07 17:25:33,063 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 17:25:33,159 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 6 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-07 17:25:33,159 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-07 17:25:33,159 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [659434756] [2025-02-07 17:25:33,159 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [659434756] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-07 17:25:33,159 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1026209578] [2025-02-07 17:25:33,159 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-02-07 17:25:33,159 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-07 17:25:33,159 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-07 17:25:33,161 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-07 17:25:33,162 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2025-02-07 17:25:33,205 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 25 statements into 5 equivalence classes. [2025-02-07 17:25:33,228 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) and asserted 25 of 25 statements. [2025-02-07 17:25:33,229 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2025-02-07 17:25:33,229 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 17:25:33,230 INFO L256 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 12 conjuncts are in the unsatisfiable core [2025-02-07 17:25:33,231 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-07 17:25:33,304 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 10 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-07 17:25:33,304 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-07 17:25:33,392 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 10 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-07 17:25:33,392 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1026209578] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-07 17:25:33,392 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-07 17:25:33,392 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 20 [2025-02-07 17:25:33,392 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1026569508] [2025-02-07 17:25:33,392 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-07 17:25:33,392 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2025-02-07 17:25:33,392 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-07 17:25:33,393 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2025-02-07 17:25:33,393 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=279, Unknown=0, NotChecked=0, Total=380 [2025-02-07 17:25:33,393 INFO L87 Difference]: Start difference. First operand 34 states and 39 transitions. Second operand has 20 states, 20 states have (on average 2.25) internal successors, (45), 20 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-07 17:25:33,562 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-07 17:25:33,563 INFO L93 Difference]: Finished difference Result 64 states and 75 transitions. [2025-02-07 17:25:33,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2025-02-07 17:25:33,563 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 20 states have internal predecessors, (45), 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 25 [2025-02-07 17:25:33,563 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-07 17:25:33,564 INFO L225 Difference]: With dead ends: 64 [2025-02-07 17:25:33,564 INFO L226 Difference]: Without dead ends: 61 [2025-02-07 17:25:33,564 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 33 SyntacticMatches, 10 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 309 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=206, Invalid=664, Unknown=0, NotChecked=0, Total=870 [2025-02-07 17:25:33,564 INFO L435 NwaCegarLoop]: 6 mSDtfsCounter, 33 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 251 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 259 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 251 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-02-07 17:25:33,564 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [33 Valid, 33 Invalid, 259 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 251 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-02-07 17:25:33,565 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2025-02-07 17:25:33,570 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 28. [2025-02-07 17:25:33,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 27 states have (on average 1.1851851851851851) internal successors, (32), 27 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) [2025-02-07 17:25:33,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 32 transitions. [2025-02-07 17:25:33,571 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 32 transitions. Word has length 25 [2025-02-07 17:25:33,571 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-07 17:25:33,571 INFO L471 AbstractCegarLoop]: Abstraction has 28 states and 32 transitions. [2025-02-07 17:25:33,571 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 20 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-07 17:25:33,571 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 32 transitions. [2025-02-07 17:25:33,571 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2025-02-07 17:25:33,571 INFO L210 NwaCegarLoop]: Found error trace [2025-02-07 17:25:33,572 INFO L218 NwaCegarLoop]: trace histogram [5, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-07 17:25:33,578 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2025-02-07 17:25:33,772 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 [2025-02-07 17:25:33,773 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-07 17:25:33,773 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-07 17:25:33,773 INFO L85 PathProgramCache]: Analyzing trace with hash 1880886699, now seen corresponding path program 10 times [2025-02-07 17:25:33,773 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-07 17:25:33,773 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1924677888] [2025-02-07 17:25:33,773 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-02-07 17:25:33,774 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-07 17:25:33,779 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 27 statements into 2 equivalence classes. [2025-02-07 17:25:33,783 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 27 of 27 statements. [2025-02-07 17:25:33,783 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-02-07 17:25:33,783 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 17:25:33,858 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 35 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-07 17:25:33,858 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-07 17:25:33,858 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1924677888] [2025-02-07 17:25:33,858 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1924677888] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-07 17:25:33,858 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1922608490] [2025-02-07 17:25:33,858 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-02-07 17:25:33,858 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-07 17:25:33,859 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-07 17:25:33,862 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-07 17:25:33,864 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2025-02-07 17:25:33,908 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 27 statements into 2 equivalence classes. [2025-02-07 17:25:33,930 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 27 of 27 statements. [2025-02-07 17:25:33,930 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-02-07 17:25:33,930 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 17:25:33,931 INFO L256 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 12 conjuncts are in the unsatisfiable core [2025-02-07 17:25:33,932 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-07 17:25:34,007 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 35 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-07 17:25:34,007 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-07 17:25:34,056 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 35 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-07 17:25:34,057 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1922608490] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-07 17:25:34,057 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-07 17:25:34,057 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 17 [2025-02-07 17:25:34,057 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [602386974] [2025-02-07 17:25:34,057 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-07 17:25:34,057 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2025-02-07 17:25:34,057 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-07 17:25:34,058 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2025-02-07 17:25:34,058 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=196, Unknown=0, NotChecked=0, Total=272 [2025-02-07 17:25:34,058 INFO L87 Difference]: Start difference. First operand 28 states and 32 transitions. Second operand has 17 states, 17 states have (on average 2.411764705882353) internal successors, (41), 17 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) [2025-02-07 17:25:34,147 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-07 17:25:34,148 INFO L93 Difference]: Finished difference Result 67 states and 79 transitions. [2025-02-07 17:25:34,148 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2025-02-07 17:25:34,148 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.411764705882353) internal successors, (41), 17 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) Word has length 27 [2025-02-07 17:25:34,148 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-07 17:25:34,148 INFO L225 Difference]: With dead ends: 67 [2025-02-07 17:25:34,148 INFO L226 Difference]: Without dead ends: 41 [2025-02-07 17:25:34,149 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 40 SyntacticMatches, 9 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 122 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=131, Invalid=331, Unknown=0, NotChecked=0, Total=462 [2025-02-07 17:25:34,149 INFO L435 NwaCegarLoop]: 7 mSDtfsCounter, 61 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 97 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 20 SdHoareTripleChecker+Invalid, 119 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 97 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-02-07 17:25:34,149 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [61 Valid, 20 Invalid, 119 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 97 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-02-07 17:25:34,150 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2025-02-07 17:25:34,155 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 29. [2025-02-07 17:25:34,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 28 states have (on average 1.1785714285714286) internal successors, (33), 28 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) [2025-02-07 17:25:34,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 33 transitions. [2025-02-07 17:25:34,156 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 33 transitions. Word has length 27 [2025-02-07 17:25:34,156 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-07 17:25:34,156 INFO L471 AbstractCegarLoop]: Abstraction has 29 states and 33 transitions. [2025-02-07 17:25:34,156 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.411764705882353) internal successors, (41), 17 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) [2025-02-07 17:25:34,156 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 33 transitions. [2025-02-07 17:25:34,157 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2025-02-07 17:25:34,157 INFO L210 NwaCegarLoop]: Found error trace [2025-02-07 17:25:34,157 INFO L218 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-07 17:25:34,164 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2025-02-07 17:25:34,357 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 [2025-02-07 17:25:34,358 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-07 17:25:34,358 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-07 17:25:34,358 INFO L85 PathProgramCache]: Analyzing trace with hash 74496793, now seen corresponding path program 11 times [2025-02-07 17:25:34,358 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-07 17:25:34,358 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1748547814] [2025-02-07 17:25:34,358 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-02-07 17:25:34,359 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-07 17:25:34,363 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 28 statements into 6 equivalence classes. [2025-02-07 17:25:34,371 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) and asserted 28 of 28 statements. [2025-02-07 17:25:34,371 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2025-02-07 17:25:34,372 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 17:25:34,929 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 4 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-07 17:25:34,929 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-07 17:25:34,929 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1748547814] [2025-02-07 17:25:34,929 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1748547814] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-07 17:25:34,930 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [204763767] [2025-02-07 17:25:34,930 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-02-07 17:25:34,930 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-07 17:25:34,930 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-07 17:25:34,934 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-07 17:25:34,945 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2025-02-07 17:25:34,995 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 28 statements into 6 equivalence classes. [2025-02-07 17:25:35,028 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) and asserted 28 of 28 statements. [2025-02-07 17:25:35,028 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2025-02-07 17:25:35,028 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 17:25:35,029 INFO L256 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 63 conjuncts are in the unsatisfiable core [2025-02-07 17:25:35,031 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-07 17:25:35,037 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2025-02-07 17:25:35,067 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 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 19 treesize of output 11 [2025-02-07 17:25:35,190 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 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 19 treesize of output 11 [2025-02-07 17:25:35,378 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 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 19 treesize of output 11 [2025-02-07 17:25:35,612 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 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 19 treesize of output 11 [2025-02-07 17:25:35,872 INFO L349 Elim1Store]: treesize reduction 80, result has 1.2 percent of original size [2025-02-07 17:25:35,872 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 56 treesize of output 16 [2025-02-07 17:25:35,877 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 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 19 treesize of output 11 [2025-02-07 17:25:35,934 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-07 17:25:35,934 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-07 17:25:36,839 INFO L349 Elim1Store]: treesize reduction 80, result has 1.2 percent of original size [2025-02-07 17:25:36,840 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 61 treesize of output 21 [2025-02-07 17:25:37,193 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-07 17:25:37,194 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [204763767] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-07 17:25:37,194 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-07 17:25:37,194 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24, 24] total 57 [2025-02-07 17:25:37,194 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [384645569] [2025-02-07 17:25:37,194 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-07 17:25:37,194 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 57 states [2025-02-07 17:25:37,194 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-07 17:25:37,194 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2025-02-07 17:25:37,195 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=364, Invalid=2828, Unknown=0, NotChecked=0, Total=3192 [2025-02-07 17:25:37,195 INFO L87 Difference]: Start difference. First operand 29 states and 33 transitions. Second operand has 57 states, 57 states have (on average 1.1228070175438596) internal successors, (64), 57 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-07 17:25:44,828 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-07 17:25:44,829 INFO L93 Difference]: Finished difference Result 110 states and 141 transitions. [2025-02-07 17:25:44,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2025-02-07 17:25:44,829 INFO L78 Accepts]: Start accepts. Automaton has has 57 states, 57 states have (on average 1.1228070175438596) internal successors, (64), 57 states have internal predecessors, (64), 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 28 [2025-02-07 17:25:44,829 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-07 17:25:44,830 INFO L225 Difference]: With dead ends: 110 [2025-02-07 17:25:44,830 INFO L226 Difference]: Without dead ends: 96 [2025-02-07 17:25:44,832 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 107 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3667 ImplicationChecksByTransitivity, 8.3s TimeCoverageRelationStatistics Valid=1652, Invalid=10120, Unknown=0, NotChecked=0, Total=11772 [2025-02-07 17:25:44,832 INFO L435 NwaCegarLoop]: 6 mSDtfsCounter, 48 mSDsluCounter, 85 mSDsCounter, 0 mSdLazyCounter, 949 mSolverCounterSat, 174 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 91 SdHoareTripleChecker+Invalid, 1123 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 174 IncrementalHoareTripleChecker+Valid, 949 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2025-02-07 17:25:44,832 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [48 Valid, 91 Invalid, 1123 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [174 Valid, 949 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2025-02-07 17:25:44,832 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2025-02-07 17:25:44,849 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 63. [2025-02-07 17:25:44,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 62 states have (on average 1.2580645161290323) internal successors, (78), 62 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-07 17:25:44,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 78 transitions. [2025-02-07 17:25:44,850 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 78 transitions. Word has length 28 [2025-02-07 17:25:44,850 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-07 17:25:44,850 INFO L471 AbstractCegarLoop]: Abstraction has 63 states and 78 transitions. [2025-02-07 17:25:44,851 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 57 states, 57 states have (on average 1.1228070175438596) internal successors, (64), 57 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-07 17:25:44,851 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 78 transitions. [2025-02-07 17:25:44,851 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2025-02-07 17:25:44,851 INFO L210 NwaCegarLoop]: Found error trace [2025-02-07 17:25:44,851 INFO L218 NwaCegarLoop]: trace histogram [5, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-07 17:25:44,858 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 [2025-02-07 17:25:45,055 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 [2025-02-07 17:25:45,055 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-07 17:25:45,056 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-07 17:25:45,056 INFO L85 PathProgramCache]: Analyzing trace with hash -1722454566, now seen corresponding path program 5 times [2025-02-07 17:25:45,056 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-07 17:25:45,056 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1970530513] [2025-02-07 17:25:45,056 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-02-07 17:25:45,056 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-07 17:25:45,061 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 28 statements into 6 equivalence classes. [2025-02-07 17:25:45,069 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) and asserted 28 of 28 statements. [2025-02-07 17:25:45,069 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2025-02-07 17:25:45,069 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 17:25:45,427 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 22 proven. 21 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2025-02-07 17:25:45,427 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-07 17:25:45,427 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1970530513] [2025-02-07 17:25:45,428 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1970530513] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-07 17:25:45,428 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1349673573] [2025-02-07 17:25:45,428 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-02-07 17:25:45,428 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-07 17:25:45,428 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-07 17:25:45,430 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-07 17:25:45,434 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2025-02-07 17:25:45,492 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 28 statements into 6 equivalence classes. [2025-02-07 17:25:45,534 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) and asserted 28 of 28 statements. [2025-02-07 17:25:45,534 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2025-02-07 17:25:45,535 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 17:25:45,536 INFO L256 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 25 conjuncts are in the unsatisfiable core [2025-02-07 17:25:45,538 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-07 17:25:45,548 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2025-02-07 17:25:45,568 INFO L190 IndexEqualityManager]: detected not equals via solver [2025-02-07 17:25:45,569 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 21 treesize of output 20 [2025-02-07 17:25:45,600 INFO L190 IndexEqualityManager]: detected not equals via solver [2025-02-07 17:25:45,601 INFO L190 IndexEqualityManager]: detected not equals via solver [2025-02-07 17:25:45,602 INFO L190 IndexEqualityManager]: detected not equals via solver [2025-02-07 17:25:45,604 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-02-07 17:25:45,605 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 30 treesize of output 32 [2025-02-07 17:25:49,814 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 22 proven. 21 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2025-02-07 17:25:49,814 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-07 17:25:49,950 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 23 treesize of output 21 [2025-02-07 17:25:49,953 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 21 [2025-02-07 17:25:49,994 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 23 proven. 19 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2025-02-07 17:25:49,994 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1349673573] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-07 17:25:49,994 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-07 17:25:49,994 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 11] total 27 [2025-02-07 17:25:49,994 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [635428242] [2025-02-07 17:25:49,994 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-07 17:25:49,995 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2025-02-07 17:25:49,995 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-07 17:25:49,996 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2025-02-07 17:25:49,997 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=590, Unknown=1, NotChecked=0, Total=702 [2025-02-07 17:25:49,997 INFO L87 Difference]: Start difference. First operand 63 states and 78 transitions. Second operand has 27 states, 27 states have (on average 1.8518518518518519) internal successors, (50), 27 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) [2025-02-07 17:25:50,249 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-07 17:25:50,249 INFO L93 Difference]: Finished difference Result 115 states and 145 transitions. [2025-02-07 17:25:50,250 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2025-02-07 17:25:50,250 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.8518518518518519) internal successors, (50), 27 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) Word has length 28 [2025-02-07 17:25:50,250 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-07 17:25:50,251 INFO L225 Difference]: With dead ends: 115 [2025-02-07 17:25:50,251 INFO L226 Difference]: Without dead ends: 76 [2025-02-07 17:25:50,251 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 42 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 214 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=153, Invalid=776, Unknown=1, NotChecked=0, Total=930 [2025-02-07 17:25:50,252 INFO L435 NwaCegarLoop]: 6 mSDtfsCounter, 46 mSDsluCounter, 53 mSDsCounter, 0 mSdLazyCounter, 281 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 59 SdHoareTripleChecker+Invalid, 287 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 281 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-02-07 17:25:50,252 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [46 Valid, 59 Invalid, 287 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 281 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-02-07 17:25:50,253 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2025-02-07 17:25:50,288 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 66. [2025-02-07 17:25:50,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 65 states have (on average 1.2307692307692308) internal successors, (80), 65 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-07 17:25:50,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 80 transitions. [2025-02-07 17:25:50,289 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 80 transitions. Word has length 28 [2025-02-07 17:25:50,289 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-07 17:25:50,290 INFO L471 AbstractCegarLoop]: Abstraction has 66 states and 80 transitions. [2025-02-07 17:25:50,290 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.8518518518518519) internal successors, (50), 27 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) [2025-02-07 17:25:50,290 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 80 transitions. [2025-02-07 17:25:50,290 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2025-02-07 17:25:50,290 INFO L210 NwaCegarLoop]: Found error trace [2025-02-07 17:25:50,290 INFO L218 NwaCegarLoop]: trace histogram [6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-07 17:25:50,297 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2025-02-07 17:25:50,491 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 [2025-02-07 17:25:50,491 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-07 17:25:50,491 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-07 17:25:50,491 INFO L85 PathProgramCache]: Analyzing trace with hash -89015445, now seen corresponding path program 12 times [2025-02-07 17:25:50,491 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-07 17:25:50,491 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2047289123] [2025-02-07 17:25:50,491 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-02-07 17:25:50,491 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-07 17:25:50,498 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 29 statements into 6 equivalence classes. [2025-02-07 17:25:50,508 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) and asserted 29 of 29 statements. [2025-02-07 17:25:50,508 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2025-02-07 17:25:50,508 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 17:25:50,647 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 10 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-07 17:25:50,647 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-07 17:25:50,647 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2047289123] [2025-02-07 17:25:50,647 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2047289123] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-07 17:25:50,647 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1926142726] [2025-02-07 17:25:50,647 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-02-07 17:25:50,647 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-07 17:25:50,648 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-07 17:25:50,651 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-07 17:25:50,652 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2025-02-07 17:25:50,711 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 29 statements into 6 equivalence classes. [2025-02-07 17:25:50,740 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) and asserted 29 of 29 statements. [2025-02-07 17:25:50,740 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2025-02-07 17:25:50,740 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 17:25:50,741 INFO L256 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 14 conjuncts are in the unsatisfiable core [2025-02-07 17:25:50,742 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-07 17:25:50,854 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 15 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-07 17:25:50,854 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-07 17:25:50,958 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 15 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-07 17:25:50,958 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1926142726] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-07 17:25:50,958 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-07 17:25:50,958 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 23 [2025-02-07 17:25:50,958 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1805714396] [2025-02-07 17:25:50,958 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-07 17:25:50,959 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2025-02-07 17:25:50,959 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-07 17:25:50,959 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2025-02-07 17:25:50,959 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=375, Unknown=0, NotChecked=0, Total=506 [2025-02-07 17:25:50,959 INFO L87 Difference]: Start difference. First operand 66 states and 80 transitions. Second operand has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 23 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-07 17:25:51,214 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-07 17:25:51,214 INFO L93 Difference]: Finished difference Result 102 states and 123 transitions. [2025-02-07 17:25:51,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2025-02-07 17:25:51,215 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 23 states have internal predecessors, (52), 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 29 [2025-02-07 17:25:51,215 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-07 17:25:51,216 INFO L225 Difference]: With dead ends: 102 [2025-02-07 17:25:51,216 INFO L226 Difference]: Without dead ends: 99 [2025-02-07 17:25:51,216 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 38 SyntacticMatches, 12 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 441 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=274, Invalid=916, Unknown=0, NotChecked=0, Total=1190 [2025-02-07 17:25:51,217 INFO L435 NwaCegarLoop]: 6 mSDtfsCounter, 40 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 306 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 20 SdHoareTripleChecker+Invalid, 318 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 306 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-02-07 17:25:51,218 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [40 Valid, 20 Invalid, 318 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 306 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-02-07 17:25:51,218 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2025-02-07 17:25:51,238 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 69. [2025-02-07 17:25:51,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 68 states have (on average 1.2352941176470589) internal successors, (84), 68 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-07 17:25:51,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 84 transitions. [2025-02-07 17:25:51,239 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 84 transitions. Word has length 29 [2025-02-07 17:25:51,239 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-07 17:25:51,239 INFO L471 AbstractCegarLoop]: Abstraction has 69 states and 84 transitions. [2025-02-07 17:25:51,239 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 23 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-07 17:25:51,239 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 84 transitions. [2025-02-07 17:25:51,239 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2025-02-07 17:25:51,239 INFO L210 NwaCegarLoop]: Found error trace [2025-02-07 17:25:51,239 INFO L218 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-07 17:25:51,245 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2025-02-07 17:25:51,440 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 [2025-02-07 17:25:51,440 INFO L396 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-07 17:25:51,440 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-07 17:25:51,440 INFO L85 PathProgramCache]: Analyzing trace with hash -1745962632, now seen corresponding path program 13 times [2025-02-07 17:25:51,440 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-07 17:25:51,440 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1114241393] [2025-02-07 17:25:51,440 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-02-07 17:25:51,440 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-07 17:25:51,447 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 32 statements into 1 equivalence classes. [2025-02-07 17:25:51,454 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 32 of 32 statements. [2025-02-07 17:25:51,455 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-07 17:25:51,455 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 17:25:52,185 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-07 17:25:52,186 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-07 17:25:52,186 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1114241393] [2025-02-07 17:25:52,186 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1114241393] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-07 17:25:52,186 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1721893607] [2025-02-07 17:25:52,186 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-02-07 17:25:52,186 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-07 17:25:52,186 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-07 17:25:52,188 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-07 17:25:52,189 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2025-02-07 17:25:52,246 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 32 statements into 1 equivalence classes. [2025-02-07 17:25:52,263 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 32 of 32 statements. [2025-02-07 17:25:52,263 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-07 17:25:52,263 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 17:25:52,265 INFO L256 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 73 conjuncts are in the unsatisfiable core [2025-02-07 17:25:52,270 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-07 17:25:52,274 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2025-02-07 17:25:52,357 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 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 19 treesize of output 11 [2025-02-07 17:25:52,436 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 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 19 treesize of output 11 [2025-02-07 17:25:52,533 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 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 19 treesize of output 11 [2025-02-07 17:25:52,640 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 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 19 treesize of output 11 [2025-02-07 17:25:52,747 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 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 19 treesize of output 11 [2025-02-07 17:25:52,922 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 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 19 treesize of output 11 [2025-02-07 17:25:52,995 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-07 17:25:52,996 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-07 17:25:54,168 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-07 17:25:54,168 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1721893607] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-07 17:25:54,168 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-07 17:25:54,168 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 23, 23] total 61 [2025-02-07 17:25:54,168 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [988899420] [2025-02-07 17:25:54,168 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-07 17:25:54,169 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 61 states [2025-02-07 17:25:54,169 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-07 17:25:54,170 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2025-02-07 17:25:54,170 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=210, Invalid=3450, Unknown=0, NotChecked=0, Total=3660 [2025-02-07 17:25:54,170 INFO L87 Difference]: Start difference. First operand 69 states and 84 transitions. Second operand has 61 states, 61 states have (on average 1.278688524590164) internal successors, (78), 61 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-07 17:25:55,389 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-07 17:25:55,389 INFO L93 Difference]: Finished difference Result 96 states and 116 transitions. [2025-02-07 17:25:55,389 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2025-02-07 17:25:55,390 INFO L78 Accepts]: Start accepts. Automaton has has 61 states, 61 states have (on average 1.278688524590164) internal successors, (78), 61 states have internal predecessors, (78), 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 [2025-02-07 17:25:55,390 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-07 17:25:55,390 INFO L225 Difference]: With dead ends: 96 [2025-02-07 17:25:55,390 INFO L226 Difference]: Without dead ends: 93 [2025-02-07 17:25:55,391 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1636 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=343, Invalid=5357, Unknown=0, NotChecked=0, Total=5700 [2025-02-07 17:25:55,392 INFO L435 NwaCegarLoop]: 6 mSDtfsCounter, 4 mSDsluCounter, 106 mSDsCounter, 0 mSdLazyCounter, 1285 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 112 SdHoareTripleChecker+Invalid, 1319 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 1285 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2025-02-07 17:25:55,392 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 112 Invalid, 1319 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 1285 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2025-02-07 17:25:55,392 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2025-02-07 17:25:55,418 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 81. [2025-02-07 17:25:55,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 80 states have (on average 1.225) internal successors, (98), 80 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) [2025-02-07 17:25:55,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 98 transitions. [2025-02-07 17:25:55,420 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 98 transitions. Word has length 32 [2025-02-07 17:25:55,420 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-07 17:25:55,420 INFO L471 AbstractCegarLoop]: Abstraction has 81 states and 98 transitions. [2025-02-07 17:25:55,420 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 61 states, 61 states have (on average 1.278688524590164) internal successors, (78), 61 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-07 17:25:55,421 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 98 transitions. [2025-02-07 17:25:55,421 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2025-02-07 17:25:55,421 INFO L210 NwaCegarLoop]: Found error trace [2025-02-07 17:25:55,421 INFO L218 NwaCegarLoop]: trace histogram [6, 6, 6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-07 17:25:55,428 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2025-02-07 17:25:55,622 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,20 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-07 17:25:55,622 INFO L396 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-07 17:25:55,622 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-07 17:25:55,622 INFO L85 PathProgramCache]: Analyzing trace with hash 752053305, now seen corresponding path program 6 times [2025-02-07 17:25:55,623 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-07 17:25:55,623 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1422274004] [2025-02-07 17:25:55,623 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-02-07 17:25:55,623 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-07 17:25:55,628 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 32 statements into 7 equivalence classes. [2025-02-07 17:25:55,640 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) and asserted 32 of 32 statements. [2025-02-07 17:25:55,640 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2025-02-07 17:25:55,640 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 17:25:56,074 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 17 proven. 54 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-02-07 17:25:56,074 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-07 17:25:56,074 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1422274004] [2025-02-07 17:25:56,074 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1422274004] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-07 17:25:56,074 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2145505540] [2025-02-07 17:25:56,074 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-02-07 17:25:56,074 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-07 17:25:56,075 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-07 17:25:56,076 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-07 17:25:56,078 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2025-02-07 17:25:56,142 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 32 statements into 7 equivalence classes. [2025-02-07 17:25:56,195 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) and asserted 32 of 32 statements. [2025-02-07 17:25:56,196 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2025-02-07 17:25:56,196 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 17:25:56,200 INFO L256 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 37 conjuncts are in the unsatisfiable core [2025-02-07 17:25:56,201 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-07 17:25:56,216 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2025-02-07 17:25:56,236 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2025-02-07 17:25:56,267 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-02-07 17:25:56,267 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 28 [2025-02-07 17:25:57,037 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-02-07 17:25:57,037 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 31 treesize of output 37 [2025-02-07 17:25:57,177 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 62 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2025-02-07 17:25:57,178 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-07 17:25:57,472 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 17 proven. 42 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2025-02-07 17:25:57,472 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2145505540] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-07 17:25:57,472 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-07 17:25:57,472 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17, 14] total 39 [2025-02-07 17:25:57,472 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [892810348] [2025-02-07 17:25:57,472 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-07 17:25:57,472 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2025-02-07 17:25:57,472 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-07 17:25:57,473 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2025-02-07 17:25:57,473 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=158, Invalid=1324, Unknown=0, NotChecked=0, Total=1482 [2025-02-07 17:25:57,473 INFO L87 Difference]: Start difference. First operand 81 states and 98 transitions. Second operand has 39 states, 39 states have (on average 1.8461538461538463) internal successors, (72), 39 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-07 17:26:00,232 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-07 17:26:00,233 INFO L93 Difference]: Finished difference Result 196 states and 239 transitions. [2025-02-07 17:26:00,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2025-02-07 17:26:00,233 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 1.8461538461538463) internal successors, (72), 39 states have internal predecessors, (72), 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 [2025-02-07 17:26:00,233 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-07 17:26:00,234 INFO L225 Difference]: With dead ends: 196 [2025-02-07 17:26:00,234 INFO L226 Difference]: Without dead ends: 124 [2025-02-07 17:26:00,236 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 41 SyntacticMatches, 2 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3265 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=1391, Invalid=9115, Unknown=0, NotChecked=0, Total=10506 [2025-02-07 17:26:00,237 INFO L435 NwaCegarLoop]: 6 mSDtfsCounter, 81 mSDsluCounter, 45 mSDsCounter, 0 mSdLazyCounter, 674 mSolverCounterSat, 58 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 81 SdHoareTripleChecker+Valid, 51 SdHoareTripleChecker+Invalid, 734 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 58 IncrementalHoareTripleChecker+Valid, 674 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2025-02-07 17:26:00,237 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [81 Valid, 51 Invalid, 734 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [58 Valid, 674 Invalid, 2 Unknown, 0 Unchecked, 1.3s Time] [2025-02-07 17:26:00,238 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2025-02-07 17:26:00,260 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 71. [2025-02-07 17:26:00,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 70 states have (on average 1.1857142857142857) internal successors, (83), 70 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-07 17:26:00,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 83 transitions. [2025-02-07 17:26:00,261 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 83 transitions. Word has length 32 [2025-02-07 17:26:00,261 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-07 17:26:00,261 INFO L471 AbstractCegarLoop]: Abstraction has 71 states and 83 transitions. [2025-02-07 17:26:00,261 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 1.8461538461538463) internal successors, (72), 39 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-07 17:26:00,261 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 83 transitions. [2025-02-07 17:26:00,261 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2025-02-07 17:26:00,261 INFO L210 NwaCegarLoop]: Found error trace [2025-02-07 17:26:00,262 INFO L218 NwaCegarLoop]: trace histogram [7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-07 17:26:00,272 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2025-02-07 17:26:00,466 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,21 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-07 17:26:00,466 INFO L396 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-07 17:26:00,466 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-07 17:26:00,466 INFO L85 PathProgramCache]: Analyzing trace with hash -1976352566, now seen corresponding path program 14 times [2025-02-07 17:26:00,466 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-07 17:26:00,466 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [375759361] [2025-02-07 17:26:00,466 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-07 17:26:00,466 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-07 17:26:00,476 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 33 statements into 2 equivalence classes. [2025-02-07 17:26:00,480 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 33 of 33 statements. [2025-02-07 17:26:00,484 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-02-07 17:26:00,485 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 17:26:00,754 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 15 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-07 17:26:00,755 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-07 17:26:00,755 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [375759361] [2025-02-07 17:26:00,755 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [375759361] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-07 17:26:00,755 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [118466801] [2025-02-07 17:26:00,755 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-07 17:26:00,755 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-07 17:26:00,755 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-07 17:26:00,757 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-07 17:26:00,762 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2025-02-07 17:26:00,823 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 33 statements into 2 equivalence classes. [2025-02-07 17:26:00,840 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 33 of 33 statements. [2025-02-07 17:26:00,840 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-02-07 17:26:00,840 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 17:26:00,841 INFO L256 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 16 conjuncts are in the unsatisfiable core [2025-02-07 17:26:00,841 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-07 17:26:01,079 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 21 proven. 58 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-07 17:26:01,079 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-07 17:26:01,214 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 21 proven. 58 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-07 17:26:01,214 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [118466801] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-07 17:26:01,214 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-07 17:26:01,214 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 26 [2025-02-07 17:26:01,214 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [369081295] [2025-02-07 17:26:01,214 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-07 17:26:01,214 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2025-02-07 17:26:01,214 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-07 17:26:01,215 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2025-02-07 17:26:01,215 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=165, Invalid=485, Unknown=0, NotChecked=0, Total=650 [2025-02-07 17:26:01,215 INFO L87 Difference]: Start difference. First operand 71 states and 83 transitions. Second operand has 26 states, 26 states have (on average 2.269230769230769) internal successors, (59), 26 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) [2025-02-07 17:26:01,536 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-07 17:26:01,536 INFO L93 Difference]: Finished difference Result 106 states and 125 transitions. [2025-02-07 17:26:01,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2025-02-07 17:26:01,536 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.269230769230769) internal successors, (59), 26 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) Word has length 33 [2025-02-07 17:26:01,536 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-07 17:26:01,537 INFO L225 Difference]: With dead ends: 106 [2025-02-07 17:26:01,537 INFO L226 Difference]: Without dead ends: 103 [2025-02-07 17:26:01,537 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 43 SyntacticMatches, 14 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 595 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=352, Invalid=1208, Unknown=0, NotChecked=0, Total=1560 [2025-02-07 17:26:01,537 INFO L435 NwaCegarLoop]: 6 mSDtfsCounter, 38 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 509 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 521 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 509 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2025-02-07 17:26:01,538 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [38 Valid, 36 Invalid, 521 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 509 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2025-02-07 17:26:01,538 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2025-02-07 17:26:01,560 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 71. [2025-02-07 17:26:01,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 70 states have (on average 1.1857142857142857) internal successors, (83), 70 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-07 17:26:01,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 83 transitions. [2025-02-07 17:26:01,561 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 83 transitions. Word has length 33 [2025-02-07 17:26:01,561 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-07 17:26:01,561 INFO L471 AbstractCegarLoop]: Abstraction has 71 states and 83 transitions. [2025-02-07 17:26:01,561 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.269230769230769) internal successors, (59), 26 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) [2025-02-07 17:26:01,561 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 83 transitions. [2025-02-07 17:26:01,562 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2025-02-07 17:26:01,562 INFO L210 NwaCegarLoop]: Found error trace [2025-02-07 17:26:01,562 INFO L218 NwaCegarLoop]: trace histogram [7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-07 17:26:01,568 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2025-02-07 17:26:01,766 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2025-02-07 17:26:01,766 INFO L396 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-07 17:26:01,766 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-07 17:26:01,766 INFO L85 PathProgramCache]: Analyzing trace with hash -1989262407, now seen corresponding path program 15 times [2025-02-07 17:26:01,766 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-07 17:26:01,766 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2051888482] [2025-02-07 17:26:01,766 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-02-07 17:26:01,766 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-07 17:26:01,772 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 36 statements into 8 equivalence classes. [2025-02-07 17:26:01,790 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) and asserted 36 of 36 statements. [2025-02-07 17:26:01,790 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2025-02-07 17:26:01,790 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 17:26:02,797 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-07 17:26:02,797 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-07 17:26:02,797 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2051888482] [2025-02-07 17:26:02,797 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2051888482] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-07 17:26:02,798 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1986960277] [2025-02-07 17:26:02,798 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-02-07 17:26:02,798 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-07 17:26:02,798 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-07 17:26:02,800 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-07 17:26:02,800 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2025-02-07 17:26:02,877 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 36 statements into 8 equivalence classes. [2025-02-07 17:26:02,947 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) and asserted 36 of 36 statements. [2025-02-07 17:26:02,947 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2025-02-07 17:26:02,947 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 17:26:02,949 INFO L256 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 83 conjuncts are in the unsatisfiable core [2025-02-07 17:26:02,951 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-07 17:26:02,954 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2025-02-07 17:26:03,017 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 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 19 treesize of output 11 [2025-02-07 17:26:03,111 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 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 19 treesize of output 11 [2025-02-07 17:26:03,212 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 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 19 treesize of output 11 [2025-02-07 17:26:03,320 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 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 19 treesize of output 11 [2025-02-07 17:26:03,458 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 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 19 treesize of output 11 [2025-02-07 17:26:03,615 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 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 19 treesize of output 11 [2025-02-07 17:26:03,793 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 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 19 treesize of output 11 [2025-02-07 17:26:03,808 INFO L349 Elim1Store]: treesize reduction 168, result has 0.6 percent of original size [2025-02-07 17:26:03,809 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 21 case distinctions, treesize of input 78 treesize of output 22 [2025-02-07 17:26:03,907 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-07 17:26:03,907 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-07 17:26:05,060 INFO L349 Elim1Store]: treesize reduction 180, result has 0.6 percent of original size [2025-02-07 17:26:05,060 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 21 case distinctions, treesize of input 86 treesize of output 29 [2025-02-07 17:26:05,454 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-07 17:26:05,454 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1986960277] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-07 17:26:05,454 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-07 17:26:05,454 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 27, 27] total 73 [2025-02-07 17:26:05,454 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1221747922] [2025-02-07 17:26:05,454 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-07 17:26:05,455 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 73 states [2025-02-07 17:26:05,455 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-07 17:26:05,455 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2025-02-07 17:26:05,455 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=256, Invalid=5000, Unknown=0, NotChecked=0, Total=5256 [2025-02-07 17:26:05,456 INFO L87 Difference]: Start difference. First operand 71 states and 83 transitions. Second operand has 73 states, 73 states have (on average 1.2465753424657535) internal successors, (91), 73 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-07 17:26:07,354 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-07 17:26:07,354 INFO L93 Difference]: Finished difference Result 99 states and 116 transitions. [2025-02-07 17:26:07,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2025-02-07 17:26:07,355 INFO L78 Accepts]: Start accepts. Automaton has has 73 states, 73 states have (on average 1.2465753424657535) internal successors, (91), 73 states have internal predecessors, (91), 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 36 [2025-02-07 17:26:07,355 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-07 17:26:07,355 INFO L225 Difference]: With dead ends: 99 [2025-02-07 17:26:07,355 INFO L226 Difference]: Without dead ends: 96 [2025-02-07 17:26:07,356 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2393 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=456, Invalid=7734, Unknown=0, NotChecked=0, Total=8190 [2025-02-07 17:26:07,356 INFO L435 NwaCegarLoop]: 6 mSDtfsCounter, 10 mSDsluCounter, 134 mSDsCounter, 0 mSdLazyCounter, 1816 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 140 SdHoareTripleChecker+Invalid, 1852 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 1816 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2025-02-07 17:26:07,356 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 140 Invalid, 1852 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 1816 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2025-02-07 17:26:07,357 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2025-02-07 17:26:07,386 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 86. [2025-02-07 17:26:07,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 85 states have (on average 1.1764705882352942) internal successors, (100), 85 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-07 17:26:07,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 100 transitions. [2025-02-07 17:26:07,387 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 100 transitions. Word has length 36 [2025-02-07 17:26:07,387 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-07 17:26:07,387 INFO L471 AbstractCegarLoop]: Abstraction has 86 states and 100 transitions. [2025-02-07 17:26:07,387 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 73 states, 73 states have (on average 1.2465753424657535) internal successors, (91), 73 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-07 17:26:07,389 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 100 transitions. [2025-02-07 17:26:07,389 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2025-02-07 17:26:07,389 INFO L210 NwaCegarLoop]: Found error trace [2025-02-07 17:26:07,389 INFO L218 NwaCegarLoop]: trace histogram [8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-07 17:26:07,396 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2025-02-07 17:26:07,590 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2025-02-07 17:26:07,590 INFO L396 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-07 17:26:07,590 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-07 17:26:07,590 INFO L85 PathProgramCache]: Analyzing trace with hash 748343819, now seen corresponding path program 16 times [2025-02-07 17:26:07,590 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-07 17:26:07,590 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1027333556] [2025-02-07 17:26:07,590 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-02-07 17:26:07,590 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-07 17:26:07,598 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 37 statements into 2 equivalence classes. [2025-02-07 17:26:07,606 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 37 of 37 statements. [2025-02-07 17:26:07,606 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-02-07 17:26:07,606 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 17:26:07,795 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 28 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-07 17:26:07,795 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-07 17:26:07,795 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1027333556] [2025-02-07 17:26:07,795 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1027333556] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-07 17:26:07,795 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [585438412] [2025-02-07 17:26:07,795 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-02-07 17:26:07,795 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-07 17:26:07,795 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-07 17:26:07,800 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-07 17:26:07,802 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2025-02-07 17:26:07,871 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 37 statements into 2 equivalence classes. [2025-02-07 17:26:07,991 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 37 of 37 statements. [2025-02-07 17:26:07,991 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-02-07 17:26:07,991 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 17:26:07,993 INFO L256 TraceCheckSpWp]: Trace formula consists of 217 conjuncts, 18 conjuncts are in the unsatisfiable core [2025-02-07 17:26:07,993 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-07 17:26:08,122 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 28 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-07 17:26:08,122 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-07 17:26:08,264 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 28 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-07 17:26:08,264 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [585438412] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-07 17:26:08,264 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-07 17:26:08,264 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 19] total 27 [2025-02-07 17:26:08,264 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [135461295] [2025-02-07 17:26:08,264 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-07 17:26:08,265 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2025-02-07 17:26:08,265 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-07 17:26:08,266 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2025-02-07 17:26:08,266 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=179, Invalid=523, Unknown=0, NotChecked=0, Total=702 [2025-02-07 17:26:08,266 INFO L87 Difference]: Start difference. First operand 86 states and 100 transitions. Second operand has 27 states, 27 states have (on average 2.2222222222222223) internal successors, (60), 27 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-07 17:26:08,644 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-07 17:26:08,644 INFO L93 Difference]: Finished difference Result 153 states and 181 transitions. [2025-02-07 17:26:08,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2025-02-07 17:26:08,645 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.2222222222222223) internal successors, (60), 27 states have internal predecessors, (60), 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 37 [2025-02-07 17:26:08,645 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-07 17:26:08,645 INFO L225 Difference]: With dead ends: 153 [2025-02-07 17:26:08,645 INFO L226 Difference]: Without dead ends: 150 [2025-02-07 17:26:08,646 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 49 SyntacticMatches, 17 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 669 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=449, Invalid=1443, Unknown=0, NotChecked=0, Total=1892 [2025-02-07 17:26:08,646 INFO L435 NwaCegarLoop]: 6 mSDtfsCounter, 41 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 474 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 484 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 474 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2025-02-07 17:26:08,646 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [41 Valid, 34 Invalid, 484 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 474 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2025-02-07 17:26:08,646 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2025-02-07 17:26:08,671 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 74. [2025-02-07 17:26:08,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 73 states have (on average 1.1917808219178083) internal successors, (87), 73 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-07 17:26:08,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 87 transitions. [2025-02-07 17:26:08,672 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 87 transitions. Word has length 37 [2025-02-07 17:26:08,672 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-07 17:26:08,672 INFO L471 AbstractCegarLoop]: Abstraction has 74 states and 87 transitions. [2025-02-07 17:26:08,672 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.2222222222222223) internal successors, (60), 27 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-07 17:26:08,672 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 87 transitions. [2025-02-07 17:26:08,673 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2025-02-07 17:26:08,673 INFO L210 NwaCegarLoop]: Found error trace [2025-02-07 17:26:08,673 INFO L218 NwaCegarLoop]: trace histogram [8, 8, 8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-07 17:26:08,680 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Ended with exit code 0 [2025-02-07 17:26:08,873 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2025-02-07 17:26:08,873 INFO L396 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-07 17:26:08,874 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-07 17:26:08,874 INFO L85 PathProgramCache]: Analyzing trace with hash -39278998, now seen corresponding path program 17 times [2025-02-07 17:26:08,874 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-07 17:26:08,874 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [868672875] [2025-02-07 17:26:08,874 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-02-07 17:26:08,874 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-07 17:26:08,881 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 39 statements into 9 equivalence classes. [2025-02-07 17:26:08,888 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) and asserted 39 of 39 statements. [2025-02-07 17:26:08,888 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2025-02-07 17:26:08,888 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 17:26:09,141 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 92 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-07 17:26:09,141 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-07 17:26:09,141 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [868672875] [2025-02-07 17:26:09,141 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [868672875] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-07 17:26:09,141 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [695019571] [2025-02-07 17:26:09,141 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-02-07 17:26:09,141 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-07 17:26:09,141 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-07 17:26:09,144 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-07 17:26:09,150 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2025-02-07 17:26:09,221 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 39 statements into 9 equivalence classes. [2025-02-07 17:26:09,290 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) and asserted 39 of 39 statements. [2025-02-07 17:26:09,290 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2025-02-07 17:26:09,290 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 17:26:09,292 INFO L256 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 18 conjuncts are in the unsatisfiable core [2025-02-07 17:26:09,292 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-07 17:26:09,450 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 92 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-07 17:26:09,450 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-07 17:26:09,567 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 92 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-07 17:26:09,567 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [695019571] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-07 17:26:09,567 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-07 17:26:09,567 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 18] total 26 [2025-02-07 17:26:09,567 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [45215245] [2025-02-07 17:26:09,567 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-07 17:26:09,567 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2025-02-07 17:26:09,567 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-07 17:26:09,568 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2025-02-07 17:26:09,568 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=169, Invalid=481, Unknown=0, NotChecked=0, Total=650 [2025-02-07 17:26:09,568 INFO L87 Difference]: Start difference. First operand 74 states and 87 transitions. Second operand has 26 states, 26 states have (on average 2.3846153846153846) internal successors, (62), 26 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-07 17:26:09,809 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-07 17:26:09,810 INFO L93 Difference]: Finished difference Result 145 states and 172 transitions. [2025-02-07 17:26:09,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2025-02-07 17:26:09,810 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.3846153846153846) internal successors, (62), 26 states have internal predecessors, (62), 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 39 [2025-02-07 17:26:09,810 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-07 17:26:09,811 INFO L225 Difference]: With dead ends: 145 [2025-02-07 17:26:09,811 INFO L226 Difference]: Without dead ends: 63 [2025-02-07 17:26:09,811 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 55 SyntacticMatches, 15 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 444 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=398, Invalid=1162, Unknown=0, NotChecked=0, Total=1560 [2025-02-07 17:26:09,811 INFO L435 NwaCegarLoop]: 7 mSDtfsCounter, 112 mSDsluCounter, 11 mSDsCounter, 0 mSdLazyCounter, 233 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 112 SdHoareTripleChecker+Valid, 18 SdHoareTripleChecker+Invalid, 280 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 233 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-02-07 17:26:09,812 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [112 Valid, 18 Invalid, 280 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 233 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-02-07 17:26:09,812 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2025-02-07 17:26:09,824 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 41. [2025-02-07 17:26:09,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 40 states have (on average 1.15) internal successors, (46), 40 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) [2025-02-07 17:26:09,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 46 transitions. [2025-02-07 17:26:09,825 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 46 transitions. Word has length 39 [2025-02-07 17:26:09,825 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-07 17:26:09,825 INFO L471 AbstractCegarLoop]: Abstraction has 41 states and 46 transitions. [2025-02-07 17:26:09,826 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.3846153846153846) internal successors, (62), 26 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-07 17:26:09,826 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 46 transitions. [2025-02-07 17:26:09,826 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2025-02-07 17:26:09,826 INFO L210 NwaCegarLoop]: Found error trace [2025-02-07 17:26:09,826 INFO L218 NwaCegarLoop]: trace histogram [8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-07 17:26:09,833 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2025-02-07 17:26:10,026 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2025-02-07 17:26:10,027 INFO L396 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-07 17:26:10,027 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-07 17:26:10,027 INFO L85 PathProgramCache]: Analyzing trace with hash -1146183976, now seen corresponding path program 18 times [2025-02-07 17:26:10,027 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-07 17:26:10,027 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [834301680] [2025-02-07 17:26:10,027 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-02-07 17:26:10,027 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-07 17:26:10,034 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 40 statements into 9 equivalence classes. [2025-02-07 17:26:10,044 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) and asserted 40 of 40 statements. [2025-02-07 17:26:10,044 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2025-02-07 17:26:10,045 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 17:26:11,043 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 0 proven. 128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-07 17:26:11,043 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-07 17:26:11,044 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [834301680] [2025-02-07 17:26:11,044 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [834301680] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-07 17:26:11,044 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [590297745] [2025-02-07 17:26:11,044 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-02-07 17:26:11,044 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-07 17:26:11,044 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-07 17:26:11,045 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-07 17:26:11,046 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2025-02-07 17:26:11,123 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 40 statements into 9 equivalence classes. [2025-02-07 17:26:11,225 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) and asserted 40 of 40 statements. [2025-02-07 17:26:11,226 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2025-02-07 17:26:11,226 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 17:26:11,232 INFO L256 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 112 conjuncts are in the unsatisfiable core [2025-02-07 17:26:11,234 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-07 17:26:11,239 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2025-02-07 17:26:11,424 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2025-02-07 17:26:11,463 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2025-02-07 17:26:11,508 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-02-07 17:26:11,508 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 28 [2025-02-07 17:26:11,668 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 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 19 treesize of output 11 [2025-02-07 17:26:11,837 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 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 19 treesize of output 11 [2025-02-07 17:26:12,029 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 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 19 treesize of output 11 [2025-02-07 17:26:12,246 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 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 19 treesize of output 11 [2025-02-07 17:26:12,463 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 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 19 treesize of output 11 [2025-02-07 17:26:12,631 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 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 19 treesize of output 11 [2025-02-07 17:26:12,835 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 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 19 treesize of output 11 [2025-02-07 17:26:13,067 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 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 19 treesize of output 11 [2025-02-07 17:26:13,080 INFO L349 Elim1Store]: treesize reduction 136, result has 0.7 percent of original size [2025-02-07 17:26:13,080 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 10 select indices, 10 select index equivalence classes, 28 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 45 case distinctions, treesize of input 75 treesize of output 31 [2025-02-07 17:26:13,207 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 0 proven. 128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-07 17:26:13,207 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-07 17:26:19,539 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 240 treesize of output 226 [2025-02-07 17:26:19,568 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-02-07 17:26:19,569 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 21 case distinctions, treesize of input 393 treesize of output 413 [2025-02-07 17:26:20,169 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 0 proven. 128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-07 17:26:20,170 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [590297745] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-07 17:26:20,170 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-07 17:26:20,170 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 34, 34] total 99 [2025-02-07 17:26:20,170 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [268210396] [2025-02-07 17:26:20,170 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-07 17:26:20,170 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 99 states [2025-02-07 17:26:20,170 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-07 17:26:20,171 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 99 interpolants. [2025-02-07 17:26:20,171 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=419, Invalid=9283, Unknown=0, NotChecked=0, Total=9702 [2025-02-07 17:26:20,172 INFO L87 Difference]: Start difference. First operand 41 states and 46 transitions. Second operand has 99 states, 99 states have (on average 1.121212121212121) internal successors, (111), 99 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-07 17:26:22,467 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-07 17:26:22,468 INFO L93 Difference]: Finished difference Result 77 states and 88 transitions. [2025-02-07 17:26:22,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2025-02-07 17:26:22,468 INFO L78 Accepts]: Start accepts. Automaton has has 99 states, 99 states have (on average 1.121212121212121) internal successors, (111), 99 states have internal predecessors, (111), 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 40 [2025-02-07 17:26:22,468 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-07 17:26:22,469 INFO L225 Difference]: With dead ends: 77 [2025-02-07 17:26:22,469 INFO L226 Difference]: Without dead ends: 74 [2025-02-07 17:26:22,471 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 104 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3919 ImplicationChecksByTransitivity, 9.2s TimeCoverageRelationStatistics Valid=530, Invalid=10600, Unknown=0, NotChecked=0, Total=11130 [2025-02-07 17:26:22,471 INFO L435 NwaCegarLoop]: 6 mSDtfsCounter, 1 mSDsluCounter, 178 mSDsCounter, 0 mSdLazyCounter, 2488 mSolverCounterSat, 65 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 184 SdHoareTripleChecker+Invalid, 2553 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 65 IncrementalHoareTripleChecker+Valid, 2488 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2025-02-07 17:26:22,472 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 184 Invalid, 2553 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [65 Valid, 2488 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2025-02-07 17:26:22,472 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2025-02-07 17:26:22,490 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 56. [2025-02-07 17:26:22,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 55 states have (on average 1.1454545454545455) internal successors, (63), 55 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-07 17:26:22,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 63 transitions. [2025-02-07 17:26:22,491 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 63 transitions. Word has length 40 [2025-02-07 17:26:22,491 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-07 17:26:22,491 INFO L471 AbstractCegarLoop]: Abstraction has 56 states and 63 transitions. [2025-02-07 17:26:22,491 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 99 states, 99 states have (on average 1.121212121212121) internal successors, (111), 99 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-07 17:26:22,491 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 63 transitions. [2025-02-07 17:26:22,492 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2025-02-07 17:26:22,492 INFO L210 NwaCegarLoop]: Found error trace [2025-02-07 17:26:22,492 INFO L218 NwaCegarLoop]: trace histogram [8, 8, 8, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-07 17:26:22,498 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Ended with exit code 0 [2025-02-07 17:26:22,696 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2025-02-07 17:26:22,696 INFO L396 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-07 17:26:22,697 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-07 17:26:22,697 INFO L85 PathProgramCache]: Analyzing trace with hash -1651742601, now seen corresponding path program 7 times [2025-02-07 17:26:22,697 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-07 17:26:22,697 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1685309132] [2025-02-07 17:26:22,697 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-02-07 17:26:22,697 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-07 17:26:22,704 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 40 statements into 1 equivalence classes. [2025-02-07 17:26:22,713 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 40 of 40 statements. [2025-02-07 17:26:22,719 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-07 17:26:22,720 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 17:26:23,128 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 21 proven. 107 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-07 17:26:23,128 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-07 17:26:23,128 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1685309132] [2025-02-07 17:26:23,128 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1685309132] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-07 17:26:23,128 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [721300496] [2025-02-07 17:26:23,128 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-02-07 17:26:23,128 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-07 17:26:23,128 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-07 17:26:23,130 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-07 17:26:23,132 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2025-02-07 17:26:23,206 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 40 statements into 1 equivalence classes. [2025-02-07 17:26:23,225 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 40 of 40 statements. [2025-02-07 17:26:23,226 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-07 17:26:23,226 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 17:26:23,227 INFO L256 TraceCheckSpWp]: Trace formula consists of 227 conjuncts, 36 conjuncts are in the unsatisfiable core [2025-02-07 17:26:23,228 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-07 17:26:23,313 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2025-02-07 17:26:23,340 INFO L190 IndexEqualityManager]: detected not equals via solver [2025-02-07 17:26:23,340 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 21 treesize of output 20 [2025-02-07 17:26:23,384 INFO L190 IndexEqualityManager]: detected not equals via solver [2025-02-07 17:26:23,385 INFO L190 IndexEqualityManager]: detected not equals via solver [2025-02-07 17:26:23,385 INFO L190 IndexEqualityManager]: detected not equals via solver [2025-02-07 17:26:23,387 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-02-07 17:26:23,387 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 30 treesize of output 32 [2025-02-07 17:26:23,454 INFO L190 IndexEqualityManager]: detected not equals via solver [2025-02-07 17:26:23,455 INFO L190 IndexEqualityManager]: detected not equals via solver [2025-02-07 17:26:23,456 INFO L190 IndexEqualityManager]: detected not equals via solver [2025-02-07 17:26:23,457 INFO L190 IndexEqualityManager]: detected not equals via solver [2025-02-07 17:26:23,458 INFO L190 IndexEqualityManager]: detected not equals via solver [2025-02-07 17:26:23,459 INFO L190 IndexEqualityManager]: detected not equals via solver [2025-02-07 17:26:23,460 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-02-07 17:26:23,460 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 39 treesize of output 44 [2025-02-07 17:26:28,374 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 54 proven. 59 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2025-02-07 17:26:28,374 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-07 17:26:28,674 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 23 treesize of output 21 [2025-02-07 17:26:28,676 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 21 [2025-02-07 17:26:28,778 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 54 proven. 56 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2025-02-07 17:26:28,779 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [721300496] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-07 17:26:28,779 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-07 17:26:28,779 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 17, 15] total 48 [2025-02-07 17:26:28,779 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [303821081] [2025-02-07 17:26:28,779 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-07 17:26:28,779 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2025-02-07 17:26:28,779 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-07 17:26:28,780 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2025-02-07 17:26:28,780 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=262, Invalid=1992, Unknown=2, NotChecked=0, Total=2256 [2025-02-07 17:26:28,780 INFO L87 Difference]: Start difference. First operand 56 states and 63 transitions. Second operand has 48 states, 48 states have (on average 1.8541666666666667) internal successors, (89), 48 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-07 17:26:30,348 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-07 17:26:30,349 INFO L93 Difference]: Finished difference Result 88 states and 102 transitions. [2025-02-07 17:26:30,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2025-02-07 17:26:30,349 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 1.8541666666666667) internal successors, (89), 48 states have internal predecessors, (89), 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 40 [2025-02-07 17:26:30,349 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-07 17:26:30,349 INFO L225 Difference]: With dead ends: 88 [2025-02-07 17:26:30,350 INFO L226 Difference]: Without dead ends: 74 [2025-02-07 17:26:30,350 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 52 SyntacticMatches, 2 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1117 ImplicationChecksByTransitivity, 5.8s TimeCoverageRelationStatistics Valid=481, Invalid=3057, Unknown=2, NotChecked=0, Total=3540 [2025-02-07 17:26:30,350 INFO L435 NwaCegarLoop]: 6 mSDtfsCounter, 80 mSDsluCounter, 71 mSDsCounter, 0 mSdLazyCounter, 750 mSolverCounterSat, 8 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 80 SdHoareTripleChecker+Valid, 77 SdHoareTripleChecker+Invalid, 760 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 750 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2025-02-07 17:26:30,351 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [80 Valid, 77 Invalid, 760 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 750 Invalid, 2 Unknown, 0 Unchecked, 1.1s Time] [2025-02-07 17:26:30,351 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2025-02-07 17:26:30,372 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 59. [2025-02-07 17:26:30,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 58 states have (on average 1.1206896551724137) internal successors, (65), 58 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-07 17:26:30,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 65 transitions. [2025-02-07 17:26:30,373 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 65 transitions. Word has length 40 [2025-02-07 17:26:30,373 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-07 17:26:30,373 INFO L471 AbstractCegarLoop]: Abstraction has 59 states and 65 transitions. [2025-02-07 17:26:30,374 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 1.8541666666666667) internal successors, (89), 48 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-07 17:26:30,374 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 65 transitions. [2025-02-07 17:26:30,374 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2025-02-07 17:26:30,374 INFO L210 NwaCegarLoop]: Found error trace [2025-02-07 17:26:30,374 INFO L218 NwaCegarLoop]: trace histogram [9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-07 17:26:30,380 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2025-02-07 17:26:30,578 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2025-02-07 17:26:30,578 INFO L396 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-07 17:26:30,578 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-07 17:26:30,578 INFO L85 PathProgramCache]: Analyzing trace with hash -1100499926, now seen corresponding path program 19 times [2025-02-07 17:26:30,578 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-07 17:26:30,578 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1352168966] [2025-02-07 17:26:30,578 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-02-07 17:26:30,578 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-07 17:26:30,589 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 41 statements into 1 equivalence classes. [2025-02-07 17:26:30,592 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 41 of 41 statements. [2025-02-07 17:26:30,592 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-07 17:26:30,592 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 17:26:30,766 INFO L134 CoverageAnalysis]: Checked inductivity of 137 backedges. 28 proven. 109 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-07 17:26:30,766 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-07 17:26:30,766 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1352168966] [2025-02-07 17:26:30,766 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1352168966] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-07 17:26:30,766 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1597677052] [2025-02-07 17:26:30,766 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-02-07 17:26:30,766 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-07 17:26:30,766 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-07 17:26:30,768 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-07 17:26:30,769 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2025-02-07 17:26:30,850 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 41 statements into 1 equivalence classes. [2025-02-07 17:26:30,869 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 41 of 41 statements. [2025-02-07 17:26:30,870 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-07 17:26:30,870 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 17:26:30,871 INFO L256 TraceCheckSpWp]: Trace formula consists of 235 conjuncts, 20 conjuncts are in the unsatisfiable core [2025-02-07 17:26:30,872 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-07 17:26:31,067 INFO L134 CoverageAnalysis]: Checked inductivity of 137 backedges. 36 proven. 101 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-07 17:26:31,068 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-07 17:26:31,218 INFO L134 CoverageAnalysis]: Checked inductivity of 137 backedges. 36 proven. 101 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-07 17:26:31,219 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1597677052] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-07 17:26:31,219 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-07 17:26:31,219 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21, 21] total 32 [2025-02-07 17:26:31,219 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1084944076] [2025-02-07 17:26:31,219 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-07 17:26:31,219 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2025-02-07 17:26:31,219 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-07 17:26:31,219 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2025-02-07 17:26:31,219 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=245, Invalid=747, Unknown=0, NotChecked=0, Total=992 [2025-02-07 17:26:31,220 INFO L87 Difference]: Start difference. First operand 59 states and 65 transitions. Second operand has 32 states, 32 states have (on average 2.28125) internal successors, (73), 32 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) [2025-02-07 17:26:31,637 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-07 17:26:31,637 INFO L93 Difference]: Finished difference Result 110 states and 128 transitions. [2025-02-07 17:26:31,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2025-02-07 17:26:31,637 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.28125) internal successors, (73), 32 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) Word has length 41 [2025-02-07 17:26:31,637 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-07 17:26:31,638 INFO L225 Difference]: With dead ends: 110 [2025-02-07 17:26:31,638 INFO L226 Difference]: Without dead ends: 107 [2025-02-07 17:26:31,638 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 53 SyntacticMatches, 18 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 969 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=538, Invalid=1912, Unknown=0, NotChecked=0, Total=2450 [2025-02-07 17:26:31,638 INFO L435 NwaCegarLoop]: 6 mSDtfsCounter, 41 mSDsluCounter, 38 mSDsCounter, 0 mSdLazyCounter, 751 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 766 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 751 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2025-02-07 17:26:31,639 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [41 Valid, 44 Invalid, 766 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 751 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2025-02-07 17:26:31,639 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2025-02-07 17:26:31,660 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 44. [2025-02-07 17:26:31,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 43 states have (on average 1.1395348837209303) internal successors, (49), 43 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-07 17:26:31,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 49 transitions. [2025-02-07 17:26:31,661 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 49 transitions. Word has length 41 [2025-02-07 17:26:31,661 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-07 17:26:31,661 INFO L471 AbstractCegarLoop]: Abstraction has 44 states and 49 transitions. [2025-02-07 17:26:31,661 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.28125) internal successors, (73), 32 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) [2025-02-07 17:26:31,661 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 49 transitions. [2025-02-07 17:26:31,661 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2025-02-07 17:26:31,661 INFO L210 NwaCegarLoop]: Found error trace [2025-02-07 17:26:31,662 INFO L218 NwaCegarLoop]: trace histogram [9, 9, 9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-07 17:26:31,668 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Ended with exit code 0 [2025-02-07 17:26:31,862 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2025-02-07 17:26:31,862 INFO L396 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-07 17:26:31,863 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-07 17:26:31,863 INFO L85 PathProgramCache]: Analyzing trace with hash -858488085, now seen corresponding path program 20 times [2025-02-07 17:26:31,863 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-07 17:26:31,864 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [812139268] [2025-02-07 17:26:31,864 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-07 17:26:31,864 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-07 17:26:31,871 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 43 statements into 2 equivalence classes. [2025-02-07 17:26:31,876 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 43 of 43 statements. [2025-02-07 17:26:31,876 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-02-07 17:26:31,876 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 17:26:32,122 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 95 proven. 58 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-07 17:26:32,122 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-07 17:26:32,122 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [812139268] [2025-02-07 17:26:32,122 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [812139268] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-07 17:26:32,122 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [869001246] [2025-02-07 17:26:32,122 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-07 17:26:32,122 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-07 17:26:32,122 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-07 17:26:32,129 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-07 17:26:32,133 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2025-02-07 17:26:32,216 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 43 statements into 2 equivalence classes. [2025-02-07 17:26:32,239 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 43 of 43 statements. [2025-02-07 17:26:32,239 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-02-07 17:26:32,239 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 17:26:32,240 INFO L256 TraceCheckSpWp]: Trace formula consists of 239 conjuncts, 20 conjuncts are in the unsatisfiable core [2025-02-07 17:26:32,241 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-07 17:26:32,434 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 117 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-07 17:26:32,434 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-07 17:26:32,577 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 117 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-07 17:26:32,578 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [869001246] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-07 17:26:32,578 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-07 17:26:32,578 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20, 20] total 31 [2025-02-07 17:26:32,578 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1966457949] [2025-02-07 17:26:32,578 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-07 17:26:32,578 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2025-02-07 17:26:32,578 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-07 17:26:32,578 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2025-02-07 17:26:32,578 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=233, Invalid=697, Unknown=0, NotChecked=0, Total=930 [2025-02-07 17:26:32,578 INFO L87 Difference]: Start difference. First operand 44 states and 49 transitions. Second operand has 31 states, 31 states have (on average 2.4193548387096775) internal successors, (75), 31 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-07 17:26:32,788 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-07 17:26:32,788 INFO L93 Difference]: Finished difference Result 113 states and 132 transitions. [2025-02-07 17:26:32,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2025-02-07 17:26:32,788 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.4193548387096775) internal successors, (75), 31 states have internal predecessors, (75), 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 43 [2025-02-07 17:26:32,788 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-07 17:26:32,789 INFO L225 Difference]: With dead ends: 113 [2025-02-07 17:26:32,789 INFO L226 Difference]: Without dead ends: 67 [2025-02-07 17:26:32,789 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 59 SyntacticMatches, 16 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 617 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=373, Invalid=1109, Unknown=0, NotChecked=0, Total=1482 [2025-02-07 17:26:32,790 INFO L435 NwaCegarLoop]: 7 mSDtfsCounter, 77 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 238 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 267 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 238 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-02-07 17:26:32,790 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [77 Valid, 29 Invalid, 267 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 238 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-02-07 17:26:32,790 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2025-02-07 17:26:32,807 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 45. [2025-02-07 17:26:32,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 44 states have (on average 1.1363636363636365) internal successors, (50), 44 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) [2025-02-07 17:26:32,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 50 transitions. [2025-02-07 17:26:32,807 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 50 transitions. Word has length 43 [2025-02-07 17:26:32,807 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-07 17:26:32,807 INFO L471 AbstractCegarLoop]: Abstraction has 45 states and 50 transitions. [2025-02-07 17:26:32,807 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 2.4193548387096775) internal successors, (75), 31 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-07 17:26:32,808 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 50 transitions. [2025-02-07 17:26:32,808 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2025-02-07 17:26:32,808 INFO L210 NwaCegarLoop]: Found error trace [2025-02-07 17:26:32,808 INFO L218 NwaCegarLoop]: trace histogram [9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-07 17:26:32,814 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Ended with exit code 0 [2025-02-07 17:26:33,008 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,29 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-07 17:26:33,008 INFO L396 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-07 17:26:33,009 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-07 17:26:33,009 INFO L85 PathProgramCache]: Analyzing trace with hash -1389587367, now seen corresponding path program 21 times [2025-02-07 17:26:33,009 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-07 17:26:33,009 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [586667961] [2025-02-07 17:26:33,009 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-02-07 17:26:33,009 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-07 17:26:33,016 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 44 statements into 10 equivalence classes. [2025-02-07 17:26:33,028 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) and asserted 44 of 44 statements. [2025-02-07 17:26:33,028 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2025-02-07 17:26:33,028 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 17:26:34,242 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 0 proven. 162 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-07 17:26:34,242 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-07 17:26:34,242 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [586667961] [2025-02-07 17:26:34,242 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [586667961] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-07 17:26:34,242 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [523955668] [2025-02-07 17:26:34,242 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-02-07 17:26:34,242 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-07 17:26:34,242 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-07 17:26:34,244 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-07 17:26:34,245 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2025-02-07 17:26:34,336 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 44 statements into 10 equivalence classes. [2025-02-07 17:26:34,455 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) and asserted 44 of 44 statements. [2025-02-07 17:26:34,456 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2025-02-07 17:26:34,456 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 17:26:34,457 INFO L256 TraceCheckSpWp]: Trace formula consists of 246 conjuncts, 106 conjuncts are in the unsatisfiable core [2025-02-07 17:26:34,460 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-07 17:26:34,463 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2025-02-07 17:26:34,556 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 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 19 treesize of output 11 [2025-02-07 17:26:34,648 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 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 19 treesize of output 11 [2025-02-07 17:26:34,771 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 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 19 treesize of output 11 [2025-02-07 17:26:34,895 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 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 19 treesize of output 11 [2025-02-07 17:26:35,037 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 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 19 treesize of output 11 [2025-02-07 17:26:35,199 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 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 19 treesize of output 11 [2025-02-07 17:26:35,391 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 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 19 treesize of output 11 [2025-02-07 17:26:35,602 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 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 19 treesize of output 11 [2025-02-07 17:26:35,883 INFO L349 Elim1Store]: treesize reduction 288, result has 0.3 percent of original size [2025-02-07 17:26:35,884 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 36 case distinctions, treesize of input 100 treesize of output 28 [2025-02-07 17:26:35,887 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 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 19 treesize of output 11 [2025-02-07 17:26:36,013 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 0 proven. 162 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-07 17:26:36,013 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-07 17:26:38,238 INFO L349 Elim1Store]: treesize reduction 304, result has 0.3 percent of original size [2025-02-07 17:26:38,238 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 36 case distinctions, treesize of input 110 treesize of output 37 [2025-02-07 17:26:38,890 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 0 proven. 162 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-07 17:26:38,890 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [523955668] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-07 17:26:38,890 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-07 17:26:38,890 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 33, 33] total 91 [2025-02-07 17:26:38,890 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1011855388] [2025-02-07 17:26:38,890 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-07 17:26:38,890 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 91 states [2025-02-07 17:26:38,890 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-07 17:26:38,891 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 91 interpolants. [2025-02-07 17:26:38,891 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=320, Invalid=7870, Unknown=0, NotChecked=0, Total=8190 [2025-02-07 17:26:38,891 INFO L87 Difference]: Start difference. First operand 45 states and 50 transitions. Second operand has 91 states, 91 states have (on average 1.2417582417582418) internal successors, (113), 91 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) [2025-02-07 17:26:41,919 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-07 17:26:41,920 INFO L93 Difference]: Finished difference Result 79 states and 90 transitions. [2025-02-07 17:26:41,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2025-02-07 17:26:41,920 INFO L78 Accepts]: Start accepts. Automaton has has 91 states, 91 states have (on average 1.2417582417582418) internal successors, (113), 91 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) Word has length 44 [2025-02-07 17:26:41,920 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-07 17:26:41,921 INFO L225 Difference]: With dead ends: 79 [2025-02-07 17:26:41,924 INFO L226 Difference]: Without dead ends: 76 [2025-02-07 17:26:41,924 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 109 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3641 ImplicationChecksByTransitivity, 5.8s TimeCoverageRelationStatistics Valid=547, Invalid=11663, Unknown=0, NotChecked=0, Total=12210 [2025-02-07 17:26:41,925 INFO L435 NwaCegarLoop]: 6 mSDtfsCounter, 10 mSDsluCounter, 196 mSDsCounter, 0 mSdLazyCounter, 2832 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 202 SdHoareTripleChecker+Invalid, 2880 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 2832 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2025-02-07 17:26:41,925 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 202 Invalid, 2880 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 2832 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2025-02-07 17:26:41,925 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2025-02-07 17:26:41,951 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 63. [2025-02-07 17:26:41,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 62 states have (on average 1.1290322580645162) internal successors, (70), 62 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-07 17:26:41,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 70 transitions. [2025-02-07 17:26:41,952 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 70 transitions. Word has length 44 [2025-02-07 17:26:41,952 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-07 17:26:41,952 INFO L471 AbstractCegarLoop]: Abstraction has 63 states and 70 transitions. [2025-02-07 17:26:41,952 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 91 states, 91 states have (on average 1.2417582417582418) internal successors, (113), 91 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) [2025-02-07 17:26:41,952 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 70 transitions. [2025-02-07 17:26:41,953 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2025-02-07 17:26:41,953 INFO L210 NwaCegarLoop]: Found error trace [2025-02-07 17:26:41,953 INFO L218 NwaCegarLoop]: trace histogram [9, 9, 9, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-07 17:26:41,959 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2025-02-07 17:26:42,156 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,30 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-07 17:26:42,156 INFO L396 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-07 17:26:42,157 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-07 17:26:42,157 INFO L85 PathProgramCache]: Analyzing trace with hash -1895145992, now seen corresponding path program 8 times [2025-02-07 17:26:42,157 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-07 17:26:42,157 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [807092249] [2025-02-07 17:26:42,157 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-07 17:26:42,157 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-07 17:26:42,164 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 44 statements into 2 equivalence classes. [2025-02-07 17:26:42,172 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 44 of 44 statements. [2025-02-07 17:26:42,172 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-02-07 17:26:42,172 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 17:26:43,261 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 3 proven. 159 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-07 17:26:43,261 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-07 17:26:43,261 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [807092249] [2025-02-07 17:26:43,261 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [807092249] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-07 17:26:43,261 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [534716749] [2025-02-07 17:26:43,261 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-07 17:26:43,261 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-07 17:26:43,262 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-07 17:26:43,264 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-07 17:26:43,265 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2025-02-07 17:26:43,375 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 44 statements into 2 equivalence classes. [2025-02-07 17:26:43,397 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 44 of 44 statements. [2025-02-07 17:26:43,397 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-02-07 17:26:43,397 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 17:26:43,398 INFO L256 TraceCheckSpWp]: Trace formula consists of 245 conjuncts, 40 conjuncts are in the unsatisfiable core [2025-02-07 17:26:43,399 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-07 17:26:43,555 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2025-02-07 17:26:43,591 INFO L190 IndexEqualityManager]: detected not equals via solver [2025-02-07 17:26:43,591 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 21 treesize of output 20 [2025-02-07 17:26:43,645 INFO L190 IndexEqualityManager]: detected not equals via solver [2025-02-07 17:26:43,646 INFO L190 IndexEqualityManager]: detected not equals via solver [2025-02-07 17:26:43,647 INFO L190 IndexEqualityManager]: detected not equals via solver [2025-02-07 17:26:43,649 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-02-07 17:26:43,649 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 30 treesize of output 32 [2025-02-07 17:26:43,715 INFO L190 IndexEqualityManager]: detected not equals via solver [2025-02-07 17:26:43,717 INFO L190 IndexEqualityManager]: detected not equals via solver [2025-02-07 17:26:43,718 INFO L190 IndexEqualityManager]: detected not equals via solver [2025-02-07 17:26:43,719 INFO L190 IndexEqualityManager]: detected not equals via solver [2025-02-07 17:26:43,719 INFO L190 IndexEqualityManager]: detected not equals via solver [2025-02-07 17:26:43,720 INFO L190 IndexEqualityManager]: detected not equals via solver [2025-02-07 17:26:43,722 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-02-07 17:26:43,722 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 39 treesize of output 44 [2025-02-07 17:26:48,978 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 65 proven. 82 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2025-02-07 17:26:48,979 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-07 17:26:49,517 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 23 treesize of output 21 [2025-02-07 17:26:49,519 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 21 [2025-02-07 17:26:49,730 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 65 proven. 79 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2025-02-07 17:26:49,730 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [534716749] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-07 17:26:49,730 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-07 17:26:49,730 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 19, 17] total 64 [2025-02-07 17:26:49,730 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1215870777] [2025-02-07 17:26:49,730 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-07 17:26:49,731 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 64 states [2025-02-07 17:26:49,731 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-07 17:26:49,731 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2025-02-07 17:26:49,731 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=289, Invalid=3741, Unknown=2, NotChecked=0, Total=4032 [2025-02-07 17:26:49,731 INFO L87 Difference]: Start difference. First operand 63 states and 70 transitions. Second operand has 64 states, 64 states have (on average 1.59375) internal successors, (102), 64 states have internal predecessors, (102), 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)