./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/array-fpi/s32if.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/s32if.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 371b46898ac196d32c6a3ef4c51b315e7fba4a376d0f69ff343a10a3b7c63d98 --- Real Ultimate output --- This is Ultimate 0.3.0-?-48c9605-m [2025-02-07 17:24:18,570 INFO L188 SettingsManager]: Resetting all preferences to default values... [2025-02-07 17:24:18,606 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2025-02-07 17:24:18,610 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2025-02-07 17:24:18,611 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2025-02-07 17:24:18,625 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2025-02-07 17:24:18,625 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2025-02-07 17:24:18,625 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2025-02-07 17:24:18,626 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2025-02-07 17:24:18,626 INFO L153 SettingsManager]: * Use memory slicer=true [2025-02-07 17:24:18,626 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2025-02-07 17:24:18,626 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2025-02-07 17:24:18,626 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2025-02-07 17:24:18,626 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2025-02-07 17:24:18,626 INFO L153 SettingsManager]: * Use SBE=true [2025-02-07 17:24:18,627 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2025-02-07 17:24:18,627 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2025-02-07 17:24:18,627 INFO L153 SettingsManager]: * sizeof long=4 [2025-02-07 17:24:18,627 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2025-02-07 17:24:18,627 INFO L153 SettingsManager]: * sizeof POINTER=4 [2025-02-07 17:24:18,627 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2025-02-07 17:24:18,627 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2025-02-07 17:24:18,627 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2025-02-07 17:24:18,627 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2025-02-07 17:24:18,627 INFO L153 SettingsManager]: * sizeof long double=12 [2025-02-07 17:24:18,627 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2025-02-07 17:24:18,628 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2025-02-07 17:24:18,628 INFO L153 SettingsManager]: * Use constant arrays=true [2025-02-07 17:24:18,628 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2025-02-07 17:24:18,628 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2025-02-07 17:24:18,628 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2025-02-07 17:24:18,628 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2025-02-07 17:24:18,628 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-02-07 17:24:18,628 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2025-02-07 17:24:18,628 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2025-02-07 17:24:18,628 INFO L153 SettingsManager]: * Compute procedure contracts=false [2025-02-07 17:24:18,628 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2025-02-07 17:24:18,628 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2025-02-07 17:24:18,628 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2025-02-07 17:24:18,628 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2025-02-07 17:24:18,628 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2025-02-07 17:24:18,628 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2025-02-07 17:24:18,628 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2025-02-07 17:24:18,628 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 -> 371b46898ac196d32c6a3ef4c51b315e7fba4a376d0f69ff343a10a3b7c63d98 [2025-02-07 17:24:18,822 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2025-02-07 17:24:18,829 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2025-02-07 17:24:18,831 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2025-02-07 17:24:18,832 INFO L270 PluginConnector]: Initializing CDTParser... [2025-02-07 17:24:18,832 INFO L274 PluginConnector]: CDTParser initialized [2025-02-07 17:24:18,833 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-fpi/s32if.c [2025-02-07 17:24:19,926 INFO L533 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/6a3aa61ed/3ddabcf80fe842f5a169371014c6870c/FLAG26233668e [2025-02-07 17:24:20,146 INFO L384 CDTParser]: Found 1 translation units. [2025-02-07 17:24:20,150 INFO L180 CDTParser]: Scanning /storage/repos/ultimate-jdk21/releaseScripts/default/sv-benchmarks/c/array-fpi/s32if.c [2025-02-07 17:24:20,158 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/6a3aa61ed/3ddabcf80fe842f5a169371014c6870c/FLAG26233668e [2025-02-07 17:24:20,172 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/6a3aa61ed/3ddabcf80fe842f5a169371014c6870c [2025-02-07 17:24:20,174 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2025-02-07 17:24:20,175 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2025-02-07 17:24:20,177 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2025-02-07 17:24:20,178 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2025-02-07 17:24:20,181 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2025-02-07 17:24:20,181 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.02 05:24:20" (1/1) ... [2025-02-07 17:24:20,182 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2959b12a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 05:24:20, skipping insertion in model container [2025-02-07 17:24:20,182 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.02 05:24:20" (1/1) ... [2025-02-07 17:24:20,195 INFO L175 MainTranslator]: Built tables and reachable declarations [2025-02-07 17:24:20,294 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/s32if.c[588,601] [2025-02-07 17:24:20,309 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-02-07 17:24:20,319 INFO L200 MainTranslator]: Completed pre-run [2025-02-07 17:24:20,327 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/s32if.c[588,601] [2025-02-07 17:24:20,333 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-02-07 17:24:20,343 INFO L204 MainTranslator]: Completed translation [2025-02-07 17:24:20,344 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 05:24:20 WrapperNode [2025-02-07 17:24:20,344 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2025-02-07 17:24:20,345 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2025-02-07 17:24:20,345 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2025-02-07 17:24:20,345 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2025-02-07 17:24:20,356 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 05:24:20" (1/1) ... [2025-02-07 17:24:20,363 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 05:24:20" (1/1) ... [2025-02-07 17:24:20,378 INFO L138 Inliner]: procedures = 17, calls = 36, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 89 [2025-02-07 17:24:20,380 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2025-02-07 17:24:20,380 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2025-02-07 17:24:20,381 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2025-02-07 17:24:20,381 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2025-02-07 17:24:20,386 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 05:24:20" (1/1) ... [2025-02-07 17:24:20,387 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 05:24:20" (1/1) ... [2025-02-07 17:24:20,388 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 05:24:20" (1/1) ... [2025-02-07 17:24:20,406 INFO L175 MemorySlicer]: Split 25 memory accesses to 4 slices as follows [2, 9, 8, 6]. 36 percent of accesses are in the largest equivalence class. The 10 initializations are split as follows [2, 0, 8, 0]. The 6 writes are split as follows [0, 3, 0, 3]. [2025-02-07 17:24:20,406 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 05:24:20" (1/1) ... [2025-02-07 17:24:20,406 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 05:24:20" (1/1) ... [2025-02-07 17:24:20,411 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 05:24:20" (1/1) ... [2025-02-07 17:24:20,415 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 05:24:20" (1/1) ... [2025-02-07 17:24:20,415 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 05:24:20" (1/1) ... [2025-02-07 17:24:20,416 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 05:24:20" (1/1) ... [2025-02-07 17:24:20,417 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2025-02-07 17:24:20,417 INFO L112 PluginConnector]: ------------------------IcfgBuilder---------------------------- [2025-02-07 17:24:20,417 INFO L270 PluginConnector]: Initializing IcfgBuilder... [2025-02-07 17:24:20,417 INFO L274 PluginConnector]: IcfgBuilder initialized [2025-02-07 17:24:20,418 INFO L184 PluginConnector]: Executing the observer IcfgBuilderObserver from plugin IcfgBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 05:24:20" (1/1) ... [2025-02-07 17:24:20,426 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-02-07 17:24:20,435 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-07 17:24:20,449 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 17:24:20,455 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 17:24:20,468 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2025-02-07 17:24:20,469 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2025-02-07 17:24:20,469 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2025-02-07 17:24:20,469 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2025-02-07 17:24:20,470 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2025-02-07 17:24:20,470 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2025-02-07 17:24:20,470 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2025-02-07 17:24:20,470 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2025-02-07 17:24:20,470 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2025-02-07 17:24:20,470 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2025-02-07 17:24:20,470 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2025-02-07 17:24:20,470 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2025-02-07 17:24:20,470 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2025-02-07 17:24:20,470 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2025-02-07 17:24:20,470 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2025-02-07 17:24:20,471 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2025-02-07 17:24:20,471 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#3 [2025-02-07 17:24:20,471 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2025-02-07 17:24:20,546 INFO L257 CfgBuilder]: Building ICFG [2025-02-07 17:24:20,548 INFO L287 CfgBuilder]: Building CFG for each procedure with an implementation [2025-02-07 17:24:20,690 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 17:24:20,695 INFO L? ?]: Removed 10 outVars from TransFormulas that were not future-live. [2025-02-07 17:24:20,695 INFO L308 CfgBuilder]: Performing block encoding [2025-02-07 17:24:20,704 INFO L332 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2025-02-07 17:24:20,705 INFO L337 CfgBuilder]: Removed 0 assume(true) statements. [2025-02-07 17:24:20,705 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 07.02 05:24:20 BoogieIcfgContainer [2025-02-07 17:24:20,706 INFO L131 PluginConnector]: ------------------------ END IcfgBuilder---------------------------- [2025-02-07 17:24:20,707 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2025-02-07 17:24:20,707 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2025-02-07 17:24:20,711 INFO L274 PluginConnector]: TraceAbstraction initialized [2025-02-07 17:24:20,711 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.02 05:24:20" (1/3) ... [2025-02-07 17:24:20,711 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5f3c76f7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.02 05:24:20, skipping insertion in model container [2025-02-07 17:24:20,711 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 05:24:20" (2/3) ... [2025-02-07 17:24:20,711 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5f3c76f7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.02 05:24:20, skipping insertion in model container [2025-02-07 17:24:20,712 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 07.02 05:24:20" (3/3) ... [2025-02-07 17:24:20,712 INFO L128 eAbstractionObserver]: Analyzing ICFG s32if.c [2025-02-07 17:24:20,722 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2025-02-07 17:24:20,723 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG s32if.c that has 1 procedures, 18 locations, 1 initial locations, 3 loop locations, and 1 error locations. [2025-02-07 17:24:20,752 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2025-02-07 17:24:20,761 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;@511c986f, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2025-02-07 17:24:20,761 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2025-02-07 17:24:20,763 INFO L276 IsEmpty]: Start isEmpty. Operand has 18 states, 16 states have (on average 1.5625) internal successors, (25), 17 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 17:24:20,766 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2025-02-07 17:24:20,766 INFO L210 NwaCegarLoop]: Found error trace [2025-02-07 17:24:20,767 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-07 17:24:20,767 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-07 17:24:20,770 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-07 17:24:20,770 INFO L85 PathProgramCache]: Analyzing trace with hash -1702049747, now seen corresponding path program 1 times [2025-02-07 17:24:20,774 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-07 17:24:20,775 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [916104961] [2025-02-07 17:24:20,775 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-07 17:24:20,775 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-07 17:24:20,825 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 9 statements into 1 equivalence classes. [2025-02-07 17:24:20,838 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 9 of 9 statements. [2025-02-07 17:24:20,839 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-07 17:24:20,839 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 17:24:20,882 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 17:24:20,883 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-07 17:24:20,883 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [916104961] [2025-02-07 17:24:20,883 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [916104961] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-07 17:24:20,883 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-07 17:24:20,883 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2025-02-07 17:24:20,884 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [392116840] [2025-02-07 17:24:20,884 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-07 17:24:20,886 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2025-02-07 17:24:20,887 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-07 17:24:20,899 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2025-02-07 17:24:20,899 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2025-02-07 17:24:20,900 INFO L87 Difference]: Start difference. First operand has 18 states, 16 states have (on average 1.5625) internal successors, (25), 17 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) Second operand has 2 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 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 17:24:20,907 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-07 17:24:20,908 INFO L93 Difference]: Finished difference Result 33 states and 45 transitions. [2025-02-07 17:24:20,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2025-02-07 17:24:20,909 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 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 9 [2025-02-07 17:24:20,909 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-07 17:24:20,912 INFO L225 Difference]: With dead ends: 33 [2025-02-07 17:24:20,912 INFO L226 Difference]: Without dead ends: 14 [2025-02-07 17:24:20,914 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 17:24:20,915 INFO L435 NwaCegarLoop]: 23 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, 23 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 17:24:20,916 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-02-07 17:24:20,924 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2025-02-07 17:24:20,929 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2025-02-07 17:24:20,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14 states, 13 states have (on average 1.3846153846153846) internal successors, (18), 13 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 17:24:20,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 18 transitions. [2025-02-07 17:24:20,933 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 18 transitions. Word has length 9 [2025-02-07 17:24:20,933 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-07 17:24:20,933 INFO L471 AbstractCegarLoop]: Abstraction has 14 states and 18 transitions. [2025-02-07 17:24:20,933 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 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 17:24:20,933 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 18 transitions. [2025-02-07 17:24:20,934 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2025-02-07 17:24:20,934 INFO L210 NwaCegarLoop]: Found error trace [2025-02-07 17:24:20,934 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-07 17:24:20,934 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2025-02-07 17:24:20,934 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-07 17:24:20,935 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-07 17:24:20,935 INFO L85 PathProgramCache]: Analyzing trace with hash -814546066, now seen corresponding path program 1 times [2025-02-07 17:24:20,935 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-07 17:24:20,935 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1849098909] [2025-02-07 17:24:20,935 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-07 17:24:20,935 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-07 17:24:20,943 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 9 statements into 1 equivalence classes. [2025-02-07 17:24:20,954 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 9 of 9 statements. [2025-02-07 17:24:20,954 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-07 17:24:20,954 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 17:24:21,050 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 17:24:21,050 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-07 17:24:21,050 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1849098909] [2025-02-07 17:24:21,050 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1849098909] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-07 17:24:21,050 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-07 17:24:21,050 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2025-02-07 17:24:21,050 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1950643324] [2025-02-07 17:24:21,050 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-07 17:24:21,051 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-02-07 17:24:21,051 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-07 17:24:21,051 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-02-07 17:24:21,055 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2025-02-07 17:24:21,056 INFO L87 Difference]: Start difference. First operand 14 states and 18 transitions. Second operand has 4 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 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 17:24:21,124 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-07 17:24:21,124 INFO L93 Difference]: Finished difference Result 30 states and 42 transitions. [2025-02-07 17:24:21,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-02-07 17:24:21,124 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 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 9 [2025-02-07 17:24:21,125 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-07 17:24:21,125 INFO L225 Difference]: With dead ends: 30 [2025-02-07 17:24:21,125 INFO L226 Difference]: Without dead ends: 21 [2025-02-07 17:24:21,125 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 17:24:21,126 INFO L435 NwaCegarLoop]: 5 mSDtfsCounter, 29 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 8 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-02-07 17:24:21,126 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [29 Valid, 8 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-02-07 17:24:21,126 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2025-02-07 17:24:21,130 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 17. [2025-02-07 17:24:21,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 16 states have (on average 1.3125) internal successors, (21), 16 states have internal predecessors, (21), 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 17:24:21,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 21 transitions. [2025-02-07 17:24:21,130 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 21 transitions. Word has length 9 [2025-02-07 17:24:21,130 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-07 17:24:21,130 INFO L471 AbstractCegarLoop]: Abstraction has 17 states and 21 transitions. [2025-02-07 17:24:21,131 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 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 17:24:21,131 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 21 transitions. [2025-02-07 17:24:21,131 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2025-02-07 17:24:21,131 INFO L210 NwaCegarLoop]: Found error trace [2025-02-07 17:24:21,131 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-07 17:24:21,131 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2025-02-07 17:24:21,131 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-07 17:24:21,131 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-07 17:24:21,131 INFO L85 PathProgramCache]: Analyzing trace with hash 2089170647, now seen corresponding path program 1 times [2025-02-07 17:24:21,132 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-07 17:24:21,132 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [80032925] [2025-02-07 17:24:21,132 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-07 17:24:21,132 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-07 17:24:21,142 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 16 statements into 1 equivalence classes. [2025-02-07 17:24:21,156 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 16 of 16 statements. [2025-02-07 17:24:21,156 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-07 17:24:21,156 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 17:24:21,589 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-02-07 17:24:21,590 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-07 17:24:21,590 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [80032925] [2025-02-07 17:24:21,590 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [80032925] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-07 17:24:21,590 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1034793201] [2025-02-07 17:24:21,590 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-07 17:24:21,590 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-07 17:24:21,590 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-07 17:24:21,593 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 17:24:21,594 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 17:24:21,630 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 16 statements into 1 equivalence classes. [2025-02-07 17:24:21,647 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 16 of 16 statements. [2025-02-07 17:24:21,647 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-07 17:24:21,647 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 17:24:21,648 INFO L256 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 16 conjuncts are in the unsatisfiable core [2025-02-07 17:24:21,652 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-07 17:24:21,693 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 1 [2025-02-07 17:24:21,746 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 36 treesize of output 13 [2025-02-07 17:24:21,795 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 15 treesize of output 7 [2025-02-07 17:24:21,809 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-07 17:24:21,809 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-07 17:24:21,946 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 17:24:21,951 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 18 treesize of output 16 [2025-02-07 17:24:21,967 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-07 17:24:21,968 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1034793201] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-07 17:24:21,968 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-07 17:24:21,968 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8] total 22 [2025-02-07 17:24:21,968 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1728994998] [2025-02-07 17:24:21,968 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-07 17:24:21,968 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2025-02-07 17:24:21,968 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-07 17:24:21,969 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2025-02-07 17:24:21,970 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=386, Unknown=0, NotChecked=0, Total=462 [2025-02-07 17:24:21,970 INFO L87 Difference]: Start difference. First operand 17 states and 21 transitions. Second operand has 22 states, 22 states have (on average 1.7727272727272727) internal successors, (39), 22 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 17:24:22,990 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-07 17:24:22,990 INFO L93 Difference]: Finished difference Result 128 states and 183 transitions. [2025-02-07 17:24:22,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2025-02-07 17:24:22,991 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.7727272727272727) internal successors, (39), 22 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) Word has length 16 [2025-02-07 17:24:22,991 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-07 17:24:22,992 INFO L225 Difference]: With dead ends: 128 [2025-02-07 17:24:22,992 INFO L226 Difference]: Without dead ends: 118 [2025-02-07 17:24:22,994 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1215 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=752, Invalid=3538, Unknown=0, NotChecked=0, Total=4290 [2025-02-07 17:24:22,995 INFO L435 NwaCegarLoop]: 6 mSDtfsCounter, 270 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 383 mSolverCounterSat, 58 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 270 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 441 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 58 IncrementalHoareTripleChecker+Valid, 383 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2025-02-07 17:24:22,995 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [270 Valid, 58 Invalid, 441 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [58 Valid, 383 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2025-02-07 17:24:22,995 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2025-02-07 17:24:23,001 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 45. [2025-02-07 17:24:23,002 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 44 states have (on average 1.4545454545454546) internal successors, (64), 44 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 17:24:23,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 64 transitions. [2025-02-07 17:24:23,002 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 64 transitions. Word has length 16 [2025-02-07 17:24:23,002 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-07 17:24:23,002 INFO L471 AbstractCegarLoop]: Abstraction has 45 states and 64 transitions. [2025-02-07 17:24:23,002 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.7727272727272727) internal successors, (39), 22 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 17:24:23,003 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 64 transitions. [2025-02-07 17:24:23,003 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2025-02-07 17:24:23,003 INFO L210 NwaCegarLoop]: Found error trace [2025-02-07 17:24:23,003 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-07 17:24:23,009 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 17:24:23,207 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 17:24:23,207 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-07 17:24:23,207 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-07 17:24:23,207 INFO L85 PathProgramCache]: Analyzing trace with hash 2090094168, now seen corresponding path program 1 times [2025-02-07 17:24:23,207 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-07 17:24:23,207 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [762645414] [2025-02-07 17:24:23,208 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-07 17:24:23,208 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-07 17:24:23,215 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 16 statements into 1 equivalence classes. [2025-02-07 17:24:23,226 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 16 of 16 statements. [2025-02-07 17:24:23,226 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-07 17:24:23,226 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 17:24:23,373 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-02-07 17:24:23,373 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-07 17:24:23,373 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [762645414] [2025-02-07 17:24:23,373 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [762645414] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-07 17:24:23,373 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1804952726] [2025-02-07 17:24:23,373 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-07 17:24:23,373 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-07 17:24:23,373 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-07 17:24:23,375 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 17:24:23,377 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 17:24:23,404 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 16 statements into 1 equivalence classes. [2025-02-07 17:24:23,416 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 16 of 16 statements. [2025-02-07 17:24:23,416 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-07 17:24:23,416 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 17:24:23,417 INFO L256 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 13 conjuncts are in the unsatisfiable core [2025-02-07 17:24:23,418 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-07 17:24:23,430 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 17:24:23,447 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-02-07 17:24:23,447 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-07 17:24:23,469 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 17:24:23,470 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 17:24:23,485 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-02-07 17:24:23,485 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1804952726] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-07 17:24:23,485 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-07 17:24:23,485 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 10 [2025-02-07 17:24:23,485 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1163281213] [2025-02-07 17:24:23,485 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-07 17:24:23,485 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2025-02-07 17:24:23,486 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-07 17:24:23,486 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2025-02-07 17:24:23,486 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2025-02-07 17:24:23,486 INFO L87 Difference]: Start difference. First operand 45 states and 64 transitions. Second operand has 10 states, 10 states have (on average 2.2) internal successors, (22), 10 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 17:24:23,557 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-07 17:24:23,558 INFO L93 Difference]: Finished difference Result 71 states and 99 transitions. [2025-02-07 17:24:23,558 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2025-02-07 17:24:23,558 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.2) internal successors, (22), 10 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) Word has length 16 [2025-02-07 17:24:23,558 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-07 17:24:23,559 INFO L225 Difference]: With dead ends: 71 [2025-02-07 17:24:23,559 INFO L226 Difference]: Without dead ends: 37 [2025-02-07 17:24:23,559 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 30 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 17:24:23,559 INFO L435 NwaCegarLoop]: 10 mSDtfsCounter, 8 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 70 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 72 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 70 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-02-07 17:24:23,559 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 38 Invalid, 72 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 70 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-02-07 17:24:23,564 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2025-02-07 17:24:23,567 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 29. [2025-02-07 17:24:23,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 28 states have (on average 1.3571428571428572) internal successors, (38), 28 states have internal predecessors, (38), 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 17:24:23,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 38 transitions. [2025-02-07 17:24:23,568 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 38 transitions. Word has length 16 [2025-02-07 17:24:23,568 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-07 17:24:23,568 INFO L471 AbstractCegarLoop]: Abstraction has 29 states and 38 transitions. [2025-02-07 17:24:23,568 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.2) internal successors, (22), 10 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 17:24:23,568 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 38 transitions. [2025-02-07 17:24:23,569 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2025-02-07 17:24:23,569 INFO L210 NwaCegarLoop]: Found error trace [2025-02-07 17:24:23,569 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-07 17:24:23,575 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 17:24:23,769 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 17:24:23,770 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-07 17:24:23,770 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-07 17:24:23,770 INFO L85 PathProgramCache]: Analyzing trace with hash -397418665, now seen corresponding path program 1 times [2025-02-07 17:24:23,770 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-07 17:24:23,771 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [159568099] [2025-02-07 17:24:23,771 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-07 17:24:23,771 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-07 17:24:23,790 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 16 statements into 1 equivalence classes. [2025-02-07 17:24:23,798 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 16 of 16 statements. [2025-02-07 17:24:23,798 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-07 17:24:23,798 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 17:24:23,947 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-02-07 17:24:23,947 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-07 17:24:23,947 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [159568099] [2025-02-07 17:24:23,947 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [159568099] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-07 17:24:23,947 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [936674473] [2025-02-07 17:24:23,948 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-07 17:24:23,948 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-07 17:24:23,948 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-07 17:24:23,949 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 17:24:23,951 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 17:24:23,982 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 16 statements into 1 equivalence classes. [2025-02-07 17:24:23,995 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 16 of 16 statements. [2025-02-07 17:24:23,995 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-07 17:24:23,995 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 17:24:23,999 INFO L256 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 17 conjuncts are in the unsatisfiable core [2025-02-07 17:24:24,000 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-07 17:24:24,039 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 17:24:24,059 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-02-07 17:24:24,059 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-07 17:24:24,099 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 27 treesize of output 23 [2025-02-07 17:24:24,106 INFO L349 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2025-02-07 17:24:24,106 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 16 [2025-02-07 17:24:24,117 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-02-07 17:24:24,117 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [936674473] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-07 17:24:24,117 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-07 17:24:24,117 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 15 [2025-02-07 17:24:24,117 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [575074994] [2025-02-07 17:24:24,117 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-07 17:24:24,117 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2025-02-07 17:24:24,117 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-07 17:24:24,118 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2025-02-07 17:24:24,118 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2025-02-07 17:24:24,118 INFO L87 Difference]: Start difference. First operand 29 states and 38 transitions. Second operand has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-07 17:24:24,255 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-07 17:24:24,256 INFO L93 Difference]: Finished difference Result 72 states and 97 transitions. [2025-02-07 17:24:24,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2025-02-07 17:24:24,256 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2025-02-07 17:24:24,256 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-07 17:24:24,257 INFO L225 Difference]: With dead ends: 72 [2025-02-07 17:24:24,257 INFO L226 Difference]: Without dead ends: 61 [2025-02-07 17:24:24,257 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=72, Invalid=200, Unknown=0, NotChecked=0, Total=272 [2025-02-07 17:24:24,257 INFO L435 NwaCegarLoop]: 7 mSDtfsCounter, 37 mSDsluCounter, 50 mSDsCounter, 0 mSdLazyCounter, 180 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 57 SdHoareTripleChecker+Invalid, 188 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 180 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-02-07 17:24:24,257 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [37 Valid, 57 Invalid, 188 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 180 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-02-07 17:24:24,258 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2025-02-07 17:24:24,266 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 39. [2025-02-07 17:24:24,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 38 states have (on average 1.368421052631579) internal successors, (52), 38 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 17:24:24,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 52 transitions. [2025-02-07 17:24:24,268 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 52 transitions. Word has length 16 [2025-02-07 17:24:24,268 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-07 17:24:24,269 INFO L471 AbstractCegarLoop]: Abstraction has 39 states and 52 transitions. [2025-02-07 17:24:24,269 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-07 17:24:24,269 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 52 transitions. [2025-02-07 17:24:24,269 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2025-02-07 17:24:24,270 INFO L210 NwaCegarLoop]: Found error trace [2025-02-07 17:24:24,270 INFO L218 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-07 17:24:24,275 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2025-02-07 17:24:24,470 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 17:24:24,471 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-07 17:24:24,471 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-07 17:24:24,474 INFO L85 PathProgramCache]: Analyzing trace with hash -643528403, now seen corresponding path program 1 times [2025-02-07 17:24:24,475 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-07 17:24:24,475 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [943444143] [2025-02-07 17:24:24,475 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-07 17:24:24,475 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-07 17:24:24,488 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 17 statements into 1 equivalence classes. [2025-02-07 17:24:24,498 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 17 of 17 statements. [2025-02-07 17:24:24,502 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-07 17:24:24,502 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 17:24:24,578 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-02-07 17:24:24,578 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-07 17:24:24,578 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [943444143] [2025-02-07 17:24:24,578 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [943444143] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-07 17:24:24,578 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1683908196] [2025-02-07 17:24:24,578 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-07 17:24:24,578 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-07 17:24:24,578 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-07 17:24:24,581 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 17:24:24,582 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 17:24:24,612 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 17 statements into 1 equivalence classes. [2025-02-07 17:24:24,623 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 17 of 17 statements. [2025-02-07 17:24:24,623 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-07 17:24:24,623 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 17:24:24,624 INFO L256 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 6 conjuncts are in the unsatisfiable core [2025-02-07 17:24:24,625 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-07 17:24:24,688 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-02-07 17:24:24,688 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-07 17:24:24,764 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-02-07 17:24:24,764 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1683908196] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-07 17:24:24,764 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-07 17:24:24,764 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 11 [2025-02-07 17:24:24,765 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1536831923] [2025-02-07 17:24:24,765 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-07 17:24:24,765 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2025-02-07 17:24:24,765 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-07 17:24:24,765 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2025-02-07 17:24:24,765 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2025-02-07 17:24:24,765 INFO L87 Difference]: Start difference. First operand 39 states and 52 transitions. Second operand has 11 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 11 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 17:24:24,974 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-07 17:24:24,974 INFO L93 Difference]: Finished difference Result 72 states and 95 transitions. [2025-02-07 17:24:24,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2025-02-07 17:24:24,974 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 11 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2025-02-07 17:24:24,975 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-07 17:24:24,975 INFO L225 Difference]: With dead ends: 72 [2025-02-07 17:24:24,975 INFO L226 Difference]: Without dead ends: 64 [2025-02-07 17:24:24,975 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 26 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 17:24:24,976 INFO L435 NwaCegarLoop]: 6 mSDtfsCounter, 52 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 163 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 20 SdHoareTripleChecker+Invalid, 186 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 163 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2025-02-07 17:24:24,976 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [52 Valid, 20 Invalid, 186 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 163 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2025-02-07 17:24:24,976 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2025-02-07 17:24:24,983 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 44. [2025-02-07 17:24:24,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 43 states have (on average 1.372093023255814) internal successors, (59), 43 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 17:24:24,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 59 transitions. [2025-02-07 17:24:24,985 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 59 transitions. Word has length 17 [2025-02-07 17:24:24,985 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-07 17:24:24,985 INFO L471 AbstractCegarLoop]: Abstraction has 44 states and 59 transitions. [2025-02-07 17:24:24,985 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 11 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 17:24:24,985 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 59 transitions. [2025-02-07 17:24:24,985 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2025-02-07 17:24:24,985 INFO L210 NwaCegarLoop]: Found error trace [2025-02-07 17:24:24,985 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-07 17:24:24,993 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 17:24:25,186 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 17:24:25,186 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-07 17:24:25,187 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-07 17:24:25,187 INFO L85 PathProgramCache]: Analyzing trace with hash 100913453, now seen corresponding path program 2 times [2025-02-07 17:24:25,187 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-07 17:24:25,187 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [651929650] [2025-02-07 17:24:25,188 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-07 17:24:25,188 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-07 17:24:25,197 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 19 statements into 2 equivalence classes. [2025-02-07 17:24:25,210 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 19 of 19 statements. [2025-02-07 17:24:25,211 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-02-07 17:24:25,211 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 17:24:25,269 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-02-07 17:24:25,270 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-07 17:24:25,270 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [651929650] [2025-02-07 17:24:25,270 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [651929650] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-07 17:24:25,270 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1728828268] [2025-02-07 17:24:25,270 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-07 17:24:25,270 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-07 17:24:25,270 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-07 17:24:25,277 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 17:24:25,278 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 17:24:25,311 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 19 statements into 2 equivalence classes. [2025-02-07 17:24:25,325 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 19 of 19 statements. [2025-02-07 17:24:25,325 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-02-07 17:24:25,325 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 17:24:25,325 INFO L256 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 6 conjuncts are in the unsatisfiable core [2025-02-07 17:24:25,326 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-07 17:24:25,361 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-02-07 17:24:25,361 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-07 17:24:25,396 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-02-07 17:24:25,396 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1728828268] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-07 17:24:25,396 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-07 17:24:25,396 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 11 [2025-02-07 17:24:25,396 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1727986735] [2025-02-07 17:24:25,396 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-07 17:24:25,396 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2025-02-07 17:24:25,396 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-07 17:24:25,396 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2025-02-07 17:24:25,396 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2025-02-07 17:24:25,397 INFO L87 Difference]: Start difference. First operand 44 states and 59 transitions. Second operand has 11 states, 11 states have (on average 2.727272727272727) internal successors, (30), 11 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-07 17:24:25,468 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-07 17:24:25,468 INFO L93 Difference]: Finished difference Result 65 states and 84 transitions. [2025-02-07 17:24:25,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2025-02-07 17:24:25,468 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.727272727272727) internal successors, (30), 11 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2025-02-07 17:24:25,468 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-07 17:24:25,469 INFO L225 Difference]: With dead ends: 65 [2025-02-07 17:24:25,469 INFO L226 Difference]: Without dead ends: 34 [2025-02-07 17:24:25,469 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 31 SyntacticMatches, 3 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2025-02-07 17:24:25,469 INFO L435 NwaCegarLoop]: 7 mSDtfsCounter, 17 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 84 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 96 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 84 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-02-07 17:24:25,470 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 21 Invalid, 96 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 84 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-02-07 17:24:25,470 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2025-02-07 17:24:25,475 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 29. [2025-02-07 17:24:25,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 28 states have (on average 1.2857142857142858) internal successors, (36), 28 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-07 17:24:25,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 36 transitions. [2025-02-07 17:24:25,481 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 36 transitions. Word has length 19 [2025-02-07 17:24:25,481 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-07 17:24:25,481 INFO L471 AbstractCegarLoop]: Abstraction has 29 states and 36 transitions. [2025-02-07 17:24:25,481 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.727272727272727) internal successors, (30), 11 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-07 17:24:25,481 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 36 transitions. [2025-02-07 17:24:25,481 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2025-02-07 17:24:25,481 INFO L210 NwaCegarLoop]: Found error trace [2025-02-07 17:24:25,481 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-07 17:24:25,487 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2025-02-07 17:24:25,682 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 17:24:25,682 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-07 17:24:25,682 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-07 17:24:25,682 INFO L85 PathProgramCache]: Analyzing trace with hash 1738020749, now seen corresponding path program 1 times [2025-02-07 17:24:25,682 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-07 17:24:25,682 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [108945168] [2025-02-07 17:24:25,682 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-07 17:24:25,682 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-07 17:24:25,689 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 23 statements into 1 equivalence classes. [2025-02-07 17:24:25,698 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 23 of 23 statements. [2025-02-07 17:24:25,698 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-07 17:24:25,698 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 17:24:26,080 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2025-02-07 17:24:26,080 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-07 17:24:26,080 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [108945168] [2025-02-07 17:24:26,080 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [108945168] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-07 17:24:26,080 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1814147454] [2025-02-07 17:24:26,081 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-07 17:24:26,081 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-07 17:24:26,081 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-07 17:24:26,084 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 17:24:26,088 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 17:24:26,124 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 23 statements into 1 equivalence classes. [2025-02-07 17:24:26,137 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 23 of 23 statements. [2025-02-07 17:24:26,137 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-07 17:24:26,137 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 17:24:26,141 INFO L256 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 28 conjuncts are in the unsatisfiable core [2025-02-07 17:24:26,143 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-07 17:24:26,176 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 17:24:26,220 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 23 treesize of output 11 [2025-02-07 17:24:26,254 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 17:24:26,339 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-07 17:24:26,339 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-07 17:24:26,523 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 15 [2025-02-07 17:24:26,524 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 12 treesize of output 8 [2025-02-07 17:24:26,558 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-07 17:24:26,558 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1814147454] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-07 17:24:26,558 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-07 17:24:26,559 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11, 12] total 32 [2025-02-07 17:24:26,559 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [242048151] [2025-02-07 17:24:26,559 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-07 17:24:26,559 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2025-02-07 17:24:26,559 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-07 17:24:26,560 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2025-02-07 17:24:26,561 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=871, Unknown=0, NotChecked=0, Total=992 [2025-02-07 17:24:26,561 INFO L87 Difference]: Start difference. First operand 29 states and 36 transitions. Second operand has 32 states, 32 states have (on average 1.75) internal successors, (56), 32 states have internal predecessors, (56), 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 17:24:29,916 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-07 17:24:29,917 INFO L93 Difference]: Finished difference Result 240 states and 343 transitions. [2025-02-07 17:24:29,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 123 states. [2025-02-07 17:24:29,917 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.75) internal successors, (56), 32 states have internal predecessors, (56), 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 17:24:29,917 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-07 17:24:29,918 INFO L225 Difference]: With dead ends: 240 [2025-02-07 17:24:29,918 INFO L226 Difference]: Without dead ends: 229 [2025-02-07 17:24:29,926 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 165 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 138 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6855 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=2247, Invalid=17213, Unknown=0, NotChecked=0, Total=19460 [2025-02-07 17:24:29,926 INFO L435 NwaCegarLoop]: 7 mSDtfsCounter, 361 mSDsluCounter, 98 mSDsCounter, 0 mSdLazyCounter, 1138 mSolverCounterSat, 166 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 361 SdHoareTripleChecker+Valid, 105 SdHoareTripleChecker+Invalid, 1304 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 166 IncrementalHoareTripleChecker+Valid, 1138 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2025-02-07 17:24:29,927 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [361 Valid, 105 Invalid, 1304 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [166 Valid, 1138 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2025-02-07 17:24:29,928 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 229 states. [2025-02-07 17:24:29,949 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 229 to 94. [2025-02-07 17:24:29,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 93 states have (on average 1.4301075268817205) internal successors, (133), 93 states have internal predecessors, (133), 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 17:24:29,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 133 transitions. [2025-02-07 17:24:29,950 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 133 transitions. Word has length 23 [2025-02-07 17:24:29,950 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-07 17:24:29,950 INFO L471 AbstractCegarLoop]: Abstraction has 94 states and 133 transitions. [2025-02-07 17:24:29,950 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 1.75) internal successors, (56), 32 states have internal predecessors, (56), 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 17:24:29,951 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 133 transitions. [2025-02-07 17:24:29,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2025-02-07 17:24:29,951 INFO L210 NwaCegarLoop]: Found error trace [2025-02-07 17:24:29,951 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-07 17:24:29,958 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2025-02-07 17:24:30,151 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 17:24:30,152 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-07 17:24:30,152 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-07 17:24:30,152 INFO L85 PathProgramCache]: Analyzing trace with hash 1738944270, now seen corresponding path program 1 times [2025-02-07 17:24:30,152 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-07 17:24:30,152 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1201461295] [2025-02-07 17:24:30,152 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-07 17:24:30,152 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-07 17:24:30,162 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 23 statements into 1 equivalence classes. [2025-02-07 17:24:30,173 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 23 of 23 statements. [2025-02-07 17:24:30,173 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-07 17:24:30,173 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 17:24:30,480 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2025-02-07 17:24:30,481 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-07 17:24:30,481 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1201461295] [2025-02-07 17:24:30,481 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1201461295] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-07 17:24:30,481 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [16646979] [2025-02-07 17:24:30,481 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-07 17:24:30,481 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-07 17:24:30,481 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-07 17:24:30,483 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 17:24:30,484 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 17:24:30,521 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 23 statements into 1 equivalence classes. [2025-02-07 17:24:30,533 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 23 of 23 statements. [2025-02-07 17:24:30,533 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-07 17:24:30,533 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 17:24:30,534 INFO L256 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 19 conjuncts are in the unsatisfiable core [2025-02-07 17:24:30,535 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-07 17:24:30,543 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 17:24:30,573 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 23 treesize of output 11 [2025-02-07 17:24:30,594 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2025-02-07 17:24:30,594 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-07 17:24:30,630 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 17:24:30,632 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 17:24:30,651 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2025-02-07 17:24:30,651 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [16646979] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-07 17:24:30,652 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-07 17:24:30,652 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8] total 19 [2025-02-07 17:24:30,652 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [984470733] [2025-02-07 17:24:30,652 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-07 17:24:30,652 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2025-02-07 17:24:30,652 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-07 17:24:30,652 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2025-02-07 17:24:30,653 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=277, Unknown=0, NotChecked=0, Total=342 [2025-02-07 17:24:30,653 INFO L87 Difference]: Start difference. First operand 94 states and 133 transitions. Second operand has 19 states, 19 states have (on average 2.0) internal successors, (38), 19 states have internal predecessors, (38), 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 17:24:30,799 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-07 17:24:30,799 INFO L93 Difference]: Finished difference Result 133 states and 186 transitions. [2025-02-07 17:24:30,799 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2025-02-07 17:24:30,799 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0) internal successors, (38), 19 states have internal predecessors, (38), 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 17:24:30,800 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-07 17:24:30,800 INFO L225 Difference]: With dead ends: 133 [2025-02-07 17:24:30,800 INFO L226 Difference]: Without dead ends: 67 [2025-02-07 17:24:30,800 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=97, Invalid=365, Unknown=0, NotChecked=0, Total=462 [2025-02-07 17:24:30,801 INFO L435 NwaCegarLoop]: 9 mSDtfsCounter, 14 mSDsluCounter, 55 mSDsCounter, 0 mSdLazyCounter, 257 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 64 SdHoareTripleChecker+Invalid, 260 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 257 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-02-07 17:24:30,801 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 64 Invalid, 260 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 257 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-02-07 17:24:30,801 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2025-02-07 17:24:30,815 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 56. [2025-02-07 17:24:30,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 55 states have (on average 1.3272727272727274) internal successors, (73), 55 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 17:24:30,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 73 transitions. [2025-02-07 17:24:30,816 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 73 transitions. Word has length 23 [2025-02-07 17:24:30,816 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-07 17:24:30,816 INFO L471 AbstractCegarLoop]: Abstraction has 56 states and 73 transitions. [2025-02-07 17:24:30,816 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.0) internal successors, (38), 19 states have internal predecessors, (38), 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 17:24:30,816 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 73 transitions. [2025-02-07 17:24:30,816 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2025-02-07 17:24:30,816 INFO L210 NwaCegarLoop]: Found error trace [2025-02-07 17:24:30,816 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-07 17:24:30,831 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2025-02-07 17:24:31,017 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 17:24:31,017 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-07 17:24:31,018 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-07 17:24:31,018 INFO L85 PathProgramCache]: Analyzing trace with hash 1609861551, now seen corresponding path program 1 times [2025-02-07 17:24:31,018 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-07 17:24:31,018 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [113231668] [2025-02-07 17:24:31,018 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-07 17:24:31,018 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-07 17:24:31,027 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 23 statements into 1 equivalence classes. [2025-02-07 17:24:31,042 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 23 of 23 statements. [2025-02-07 17:24:31,045 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-07 17:24:31,045 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 17:24:31,347 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-07 17:24:31,347 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-07 17:24:31,347 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [113231668] [2025-02-07 17:24:31,348 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [113231668] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-07 17:24:31,348 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1370768938] [2025-02-07 17:24:31,348 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-07 17:24:31,348 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-07 17:24:31,348 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-07 17:24:31,350 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 17:24:31,353 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 17:24:31,390 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 23 statements into 1 equivalence classes. [2025-02-07 17:24:31,404 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 23 of 23 statements. [2025-02-07 17:24:31,405 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-07 17:24:31,405 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 17:24:31,407 INFO L256 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 21 conjuncts are in the unsatisfiable core [2025-02-07 17:24:31,408 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-07 17:24:31,449 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 17:24:31,484 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-02-07 17:24:31,484 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-07 17:24:31,540 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 29 treesize of output 25 [2025-02-07 17:24:31,543 INFO L349 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2025-02-07 17:24:31,544 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 26 treesize of output 16 [2025-02-07 17:24:31,566 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-02-07 17:24:31,567 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1370768938] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-07 17:24:31,567 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-07 17:24:31,567 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10, 9] total 24 [2025-02-07 17:24:31,567 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1372238503] [2025-02-07 17:24:31,567 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-07 17:24:31,567 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2025-02-07 17:24:31,567 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-07 17:24:31,567 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2025-02-07 17:24:31,568 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=457, Unknown=0, NotChecked=0, Total=552 [2025-02-07 17:24:31,568 INFO L87 Difference]: Start difference. First operand 56 states and 73 transitions. Second operand has 24 states, 24 states have (on average 2.0416666666666665) internal successors, (49), 24 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 17:24:31,843 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-07 17:24:31,843 INFO L93 Difference]: Finished difference Result 88 states and 112 transitions. [2025-02-07 17:24:31,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2025-02-07 17:24:31,844 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.0416666666666665) internal successors, (49), 24 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) Word has length 23 [2025-02-07 17:24:31,844 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-07 17:24:31,844 INFO L225 Difference]: With dead ends: 88 [2025-02-07 17:24:31,844 INFO L226 Difference]: Without dead ends: 82 [2025-02-07 17:24:31,845 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 305 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=234, Invalid=956, Unknown=0, NotChecked=0, Total=1190 [2025-02-07 17:24:31,846 INFO L435 NwaCegarLoop]: 6 mSDtfsCounter, 141 mSDsluCounter, 49 mSDsCounter, 0 mSdLazyCounter, 326 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 141 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 361 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 326 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-02-07 17:24:31,846 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [141 Valid, 55 Invalid, 361 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 326 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-02-07 17:24:31,846 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2025-02-07 17:24:31,856 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 62. [2025-02-07 17:24:31,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 61 states have (on average 1.2950819672131149) internal successors, (79), 61 states have internal predecessors, (79), 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 17:24:31,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 79 transitions. [2025-02-07 17:24:31,857 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 79 transitions. Word has length 23 [2025-02-07 17:24:31,857 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-07 17:24:31,857 INFO L471 AbstractCegarLoop]: Abstraction has 62 states and 79 transitions. [2025-02-07 17:24:31,858 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.0416666666666665) internal successors, (49), 24 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 17:24:31,858 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 79 transitions. [2025-02-07 17:24:31,859 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2025-02-07 17:24:31,861 INFO L210 NwaCegarLoop]: Found error trace [2025-02-07 17:24:31,861 INFO L218 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-07 17:24:31,871 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 17:24:32,061 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 17:24:32,062 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-07 17:24:32,062 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-07 17:24:32,062 INFO L85 PathProgramCache]: Analyzing trace with hash -1935748873, now seen corresponding path program 3 times [2025-02-07 17:24:32,062 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-07 17:24:32,062 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1881232777] [2025-02-07 17:24:32,063 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-02-07 17:24:32,063 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-07 17:24:32,070 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 24 statements into 3 equivalence classes. [2025-02-07 17:24:32,086 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) and asserted 24 of 24 statements. [2025-02-07 17:24:32,087 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2025-02-07 17:24:32,087 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 17:24:32,203 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2025-02-07 17:24:32,203 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-07 17:24:32,203 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1881232777] [2025-02-07 17:24:32,203 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1881232777] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-07 17:24:32,203 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1701317210] [2025-02-07 17:24:32,203 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-02-07 17:24:32,203 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-07 17:24:32,204 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-07 17:24:32,205 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 17:24:32,207 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 17:24:32,247 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 24 statements into 3 equivalence classes. [2025-02-07 17:24:32,266 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) and asserted 24 of 24 statements. [2025-02-07 17:24:32,266 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2025-02-07 17:24:32,266 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 17:24:32,267 INFO L256 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 8 conjuncts are in the unsatisfiable core [2025-02-07 17:24:32,268 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-07 17:24:32,330 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 3 proven. 8 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2025-02-07 17:24:32,330 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-07 17:24:32,388 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 3 proven. 8 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2025-02-07 17:24:32,388 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1701317210] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-07 17:24:32,388 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-07 17:24:32,389 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 14 [2025-02-07 17:24:32,389 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [611047314] [2025-02-07 17:24:32,389 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-07 17:24:32,389 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2025-02-07 17:24:32,389 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-07 17:24:32,389 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2025-02-07 17:24:32,389 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2025-02-07 17:24:32,390 INFO L87 Difference]: Start difference. First operand 62 states and 79 transitions. Second operand has 14 states, 14 states have (on average 2.5) internal successors, (35), 14 states have internal predecessors, (35), 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 17:24:32,552 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-07 17:24:32,552 INFO L93 Difference]: Finished difference Result 107 states and 137 transitions. [2025-02-07 17:24:32,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2025-02-07 17:24:32,553 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.5) internal successors, (35), 14 states have internal predecessors, (35), 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 17:24:32,553 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-07 17:24:32,553 INFO L225 Difference]: With dead ends: 107 [2025-02-07 17:24:32,553 INFO L226 Difference]: Without dead ends: 96 [2025-02-07 17:24:32,554 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 37 SyntacticMatches, 6 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 111 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=100, Invalid=280, Unknown=0, NotChecked=0, Total=380 [2025-02-07 17:24:32,554 INFO L435 NwaCegarLoop]: 6 mSDtfsCounter, 57 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 269 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 293 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 269 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-02-07 17:24:32,554 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [57 Valid, 22 Invalid, 293 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 269 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-02-07 17:24:32,554 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2025-02-07 17:24:32,562 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 65. [2025-02-07 17:24:32,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 64 states have (on average 1.3125) internal successors, (84), 64 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 17:24:32,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 84 transitions. [2025-02-07 17:24:32,562 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 84 transitions. Word has length 24 [2025-02-07 17:24:32,563 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-07 17:24:32,563 INFO L471 AbstractCegarLoop]: Abstraction has 65 states and 84 transitions. [2025-02-07 17:24:32,563 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.5) internal successors, (35), 14 states have internal predecessors, (35), 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 17:24:32,563 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 84 transitions. [2025-02-07 17:24:32,563 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2025-02-07 17:24:32,563 INFO L210 NwaCegarLoop]: Found error trace [2025-02-07 17:24:32,563 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-07 17:24:32,572 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 17:24:32,764 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 17:24:32,764 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-07 17:24:32,765 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-07 17:24:32,765 INFO L85 PathProgramCache]: Analyzing trace with hash 156166101, now seen corresponding path program 4 times [2025-02-07 17:24:32,765 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-07 17:24:32,765 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1763316183] [2025-02-07 17:24:32,765 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-02-07 17:24:32,765 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-07 17:24:32,770 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 26 statements into 2 equivalence classes. [2025-02-07 17:24:32,773 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) and asserted 23 of 26 statements. [2025-02-07 17:24:32,773 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) [2025-02-07 17:24:32,773 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 17:24:32,813 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 12 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-02-07 17:24:32,813 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-07 17:24:32,813 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1763316183] [2025-02-07 17:24:32,813 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1763316183] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-07 17:24:32,813 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1546242235] [2025-02-07 17:24:32,813 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-02-07 17:24:32,814 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-07 17:24:32,814 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-07 17:24:32,819 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 17:24:32,820 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 17:24:32,858 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 26 statements into 2 equivalence classes. [2025-02-07 17:24:32,866 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) and asserted 23 of 26 statements. [2025-02-07 17:24:32,866 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) [2025-02-07 17:24:32,866 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 17:24:32,867 INFO L256 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 8 conjuncts are in the unsatisfiable core [2025-02-07 17:24:32,867 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-07 17:24:32,912 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 12 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-02-07 17:24:32,912 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-07 17:24:32,940 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 12 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-02-07 17:24:32,940 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1546242235] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-07 17:24:32,940 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-07 17:24:32,940 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 11 [2025-02-07 17:24:32,940 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1006436689] [2025-02-07 17:24:32,940 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-07 17:24:32,940 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2025-02-07 17:24:32,940 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-07 17:24:32,941 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2025-02-07 17:24:32,941 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2025-02-07 17:24:32,941 INFO L87 Difference]: Start difference. First operand 65 states and 84 transitions. Second operand has 11 states, 11 states have (on average 3.0) internal successors, (33), 11 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 17:24:33,022 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-07 17:24:33,023 INFO L93 Difference]: Finished difference Result 95 states and 119 transitions. [2025-02-07 17:24:33,023 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2025-02-07 17:24:33,023 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.0) internal successors, (33), 11 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 26 [2025-02-07 17:24:33,023 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-07 17:24:33,024 INFO L225 Difference]: With dead ends: 95 [2025-02-07 17:24:33,024 INFO L226 Difference]: Without dead ends: 44 [2025-02-07 17:24:33,024 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 44 SyntacticMatches, 5 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=58, Invalid=124, Unknown=0, NotChecked=0, Total=182 [2025-02-07 17:24:33,024 INFO L435 NwaCegarLoop]: 7 mSDtfsCounter, 39 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 87 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 112 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 87 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-02-07 17:24:33,024 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [39 Valid, 17 Invalid, 112 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 87 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-02-07 17:24:33,025 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2025-02-07 17:24:33,032 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 39. [2025-02-07 17:24:33,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 38 states have (on average 1.236842105263158) internal successors, (47), 38 states have internal predecessors, (47), 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 17:24:33,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 47 transitions. [2025-02-07 17:24:33,034 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 47 transitions. Word has length 26 [2025-02-07 17:24:33,034 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-07 17:24:33,034 INFO L471 AbstractCegarLoop]: Abstraction has 39 states and 47 transitions. [2025-02-07 17:24:33,034 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.0) internal successors, (33), 11 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 17:24:33,035 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 47 transitions. [2025-02-07 17:24:33,036 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2025-02-07 17:24:33,036 INFO L210 NwaCegarLoop]: Found error trace [2025-02-07 17:24:33,036 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-07 17:24:33,042 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2025-02-07 17:24:33,240 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 17:24:33,240 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-07 17:24:33,241 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-07 17:24:33,241 INFO L85 PathProgramCache]: Analyzing trace with hash 1087963607, now seen corresponding path program 2 times [2025-02-07 17:24:33,241 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-07 17:24:33,241 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1860192909] [2025-02-07 17:24:33,241 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-07 17:24:33,241 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-07 17:24:33,247 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 30 statements into 2 equivalence classes. [2025-02-07 17:24:33,255 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 30 of 30 statements. [2025-02-07 17:24:33,256 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-02-07 17:24:33,256 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 17:24:33,877 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2025-02-07 17:24:33,877 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-07 17:24:33,877 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1860192909] [2025-02-07 17:24:33,877 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1860192909] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-07 17:24:33,877 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1019774421] [2025-02-07 17:24:33,877 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-07 17:24:33,878 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-07 17:24:33,878 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-07 17:24:33,879 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 17:24:33,881 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 17:24:33,925 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 30 statements into 2 equivalence classes. [2025-02-07 17:24:33,944 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 30 of 30 statements. [2025-02-07 17:24:33,944 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-02-07 17:24:33,944 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 17:24:33,945 INFO L256 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 34 conjuncts are in the unsatisfiable core [2025-02-07 17:24:33,949 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-07 17:24:33,954 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 17:24:34,060 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 17:24:34,198 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 17:24:34,349 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 17:24:34,387 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2025-02-07 17:24:34,388 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-07 17:24:34,731 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2025-02-07 17:24:34,731 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1019774421] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-07 17:24:34,731 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-07 17:24:34,732 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 14, 14] total 33 [2025-02-07 17:24:34,732 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [282673360] [2025-02-07 17:24:34,732 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-07 17:24:34,733 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2025-02-07 17:24:34,733 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-07 17:24:34,734 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2025-02-07 17:24:34,734 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=951, Unknown=0, NotChecked=0, Total=1056 [2025-02-07 17:24:34,738 INFO L87 Difference]: Start difference. First operand 39 states and 47 transitions. Second operand has 33 states, 33 states have (on average 1.6666666666666667) internal successors, (55), 33 states have internal predecessors, (55), 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 17:24:35,829 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-07 17:24:35,829 INFO L93 Difference]: Finished difference Result 107 states and 140 transitions. [2025-02-07 17:24:35,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2025-02-07 17:24:35,832 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.6666666666666667) internal successors, (55), 33 states have internal predecessors, (55), 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 30 [2025-02-07 17:24:35,832 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-07 17:24:35,833 INFO L225 Difference]: With dead ends: 107 [2025-02-07 17:24:35,833 INFO L226 Difference]: Without dead ends: 100 [2025-02-07 17:24:35,834 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 43 SyntacticMatches, 1 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 757 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=376, Invalid=3046, Unknown=0, NotChecked=0, Total=3422 [2025-02-07 17:24:35,834 INFO L435 NwaCegarLoop]: 6 mSDtfsCounter, 33 mSDsluCounter, 68 mSDsCounter, 0 mSdLazyCounter, 1021 mSolverCounterSat, 70 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 74 SdHoareTripleChecker+Invalid, 1091 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 70 IncrementalHoareTripleChecker+Valid, 1021 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2025-02-07 17:24:35,834 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [33 Valid, 74 Invalid, 1091 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [70 Valid, 1021 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2025-02-07 17:24:35,835 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2025-02-07 17:24:35,847 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 85. [2025-02-07 17:24:35,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 84 states have (on average 1.2976190476190477) internal successors, (109), 84 states have internal predecessors, (109), 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 17:24:35,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 109 transitions. [2025-02-07 17:24:35,848 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 109 transitions. Word has length 30 [2025-02-07 17:24:35,849 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-07 17:24:35,849 INFO L471 AbstractCegarLoop]: Abstraction has 85 states and 109 transitions. [2025-02-07 17:24:35,849 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 1.6666666666666667) internal successors, (55), 33 states have internal predecessors, (55), 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 17:24:35,849 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 109 transitions. [2025-02-07 17:24:35,850 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2025-02-07 17:24:35,850 INFO L210 NwaCegarLoop]: Found error trace [2025-02-07 17:24:35,850 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-07 17:24:35,856 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2025-02-07 17:24:36,050 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 17:24:36,051 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-07 17:24:36,051 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-07 17:24:36,051 INFO L85 PathProgramCache]: Analyzing trace with hash 1088887128, now seen corresponding path program 2 times [2025-02-07 17:24:36,051 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-07 17:24:36,051 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [645114975] [2025-02-07 17:24:36,052 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-07 17:24:36,052 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-07 17:24:36,062 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 30 statements into 2 equivalence classes. [2025-02-07 17:24:36,075 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 30 of 30 statements. [2025-02-07 17:24:36,075 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-02-07 17:24:36,075 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 17:24:36,276 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 5 proven. 13 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2025-02-07 17:24:36,276 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-07 17:24:36,276 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [645114975] [2025-02-07 17:24:36,277 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [645114975] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-07 17:24:36,277 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1837809161] [2025-02-07 17:24:36,277 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-07 17:24:36,277 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-07 17:24:36,277 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-07 17:24:36,279 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 17:24:36,280 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 17:24:36,327 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 30 statements into 2 equivalence classes. [2025-02-07 17:24:36,349 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 30 of 30 statements. [2025-02-07 17:24:36,349 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-02-07 17:24:36,349 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 17:24:36,351 INFO L256 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 25 conjuncts are in the unsatisfiable core [2025-02-07 17:24:36,353 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-07 17:24:36,369 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 17:24:36,390 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 23 treesize of output 11 [2025-02-07 17:24:36,410 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2025-02-07 17:24:36,437 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 5 proven. 13 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2025-02-07 17:24:36,437 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-07 17:24:36,497 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 17:24:36,499 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 17:24:36,528 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 5 proven. 13 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2025-02-07 17:24:36,528 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1837809161] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-07 17:24:36,528 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-07 17:24:36,528 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 19 [2025-02-07 17:24:36,528 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [568761452] [2025-02-07 17:24:36,528 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-07 17:24:36,528 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2025-02-07 17:24:36,528 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-07 17:24:36,529 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2025-02-07 17:24:36,529 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2025-02-07 17:24:36,529 INFO L87 Difference]: Start difference. First operand 85 states and 109 transitions. Second operand has 19 states, 19 states have (on average 2.1052631578947367) internal successors, (40), 19 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 17:24:36,661 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-07 17:24:36,661 INFO L93 Difference]: Finished difference Result 142 states and 188 transitions. [2025-02-07 17:24:36,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2025-02-07 17:24:36,662 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.1052631578947367) internal successors, (40), 19 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 30 [2025-02-07 17:24:36,663 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-07 17:24:36,663 INFO L225 Difference]: With dead ends: 142 [2025-02-07 17:24:36,663 INFO L226 Difference]: Without dead ends: 96 [2025-02-07 17:24:36,663 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=68, Invalid=312, Unknown=0, NotChecked=0, Total=380 [2025-02-07 17:24:36,664 INFO L435 NwaCegarLoop]: 10 mSDtfsCounter, 13 mSDsluCounter, 46 mSDsCounter, 0 mSdLazyCounter, 283 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 288 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 283 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-02-07 17:24:36,664 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 56 Invalid, 288 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 283 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-02-07 17:24:36,664 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2025-02-07 17:24:36,680 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 87. [2025-02-07 17:24:36,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 86 states have (on average 1.2906976744186047) internal successors, (111), 86 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 17:24:36,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 111 transitions. [2025-02-07 17:24:36,683 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 111 transitions. Word has length 30 [2025-02-07 17:24:36,683 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-07 17:24:36,683 INFO L471 AbstractCegarLoop]: Abstraction has 87 states and 111 transitions. [2025-02-07 17:24:36,683 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.1052631578947367) internal successors, (40), 19 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 17:24:36,683 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 111 transitions. [2025-02-07 17:24:36,683 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2025-02-07 17:24:36,683 INFO L210 NwaCegarLoop]: Found error trace [2025-02-07 17:24:36,683 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-07 17:24:36,690 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2025-02-07 17:24:36,888 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 17:24:36,888 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-07 17:24:36,889 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-07 17:24:36,889 INFO L85 PathProgramCache]: Analyzing trace with hash -418664681, now seen corresponding path program 2 times [2025-02-07 17:24:36,889 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-07 17:24:36,889 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1604451004] [2025-02-07 17:24:36,889 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-07 17:24:36,889 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-07 17:24:36,895 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 30 statements into 2 equivalence classes. [2025-02-07 17:24:36,908 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 30 of 30 statements. [2025-02-07 17:24:36,909 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-02-07 17:24:36,909 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 17:24:37,218 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 5 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-07 17:24:37,218 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-07 17:24:37,218 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1604451004] [2025-02-07 17:24:37,219 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1604451004] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-07 17:24:37,219 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1263806133] [2025-02-07 17:24:37,219 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-07 17:24:37,219 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-07 17:24:37,219 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-07 17:24:37,222 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 17:24:37,227 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 17:24:37,288 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 30 statements into 2 equivalence classes. [2025-02-07 17:24:37,306 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 30 of 30 statements. [2025-02-07 17:24:37,307 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-02-07 17:24:37,307 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 17:24:37,308 INFO L256 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 31 conjuncts are in the unsatisfiable core [2025-02-07 17:24:37,309 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-07 17:24:37,357 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 17:24:37,415 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 5 proven. 24 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-02-07 17:24:37,415 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-07 17:24:37,500 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 29 treesize of output 25 [2025-02-07 17:24:37,505 INFO L349 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2025-02-07 17:24:37,505 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 26 treesize of output 16 [2025-02-07 17:24:37,544 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 5 proven. 19 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-02-07 17:24:37,545 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1263806133] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-07 17:24:37,545 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-07 17:24:37,545 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12, 11] total 28 [2025-02-07 17:24:37,545 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1820207181] [2025-02-07 17:24:37,545 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-07 17:24:37,545 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2025-02-07 17:24:37,545 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-07 17:24:37,546 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2025-02-07 17:24:37,547 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=636, Unknown=0, NotChecked=0, Total=756 [2025-02-07 17:24:37,547 INFO L87 Difference]: Start difference. First operand 87 states and 111 transitions. Second operand has 28 states, 28 states have (on average 2.3214285714285716) internal successors, (65), 28 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 17:24:37,972 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-07 17:24:37,972 INFO L93 Difference]: Finished difference Result 122 states and 156 transitions. [2025-02-07 17:24:37,972 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2025-02-07 17:24:37,972 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.3214285714285716) internal successors, (65), 28 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) Word has length 30 [2025-02-07 17:24:37,972 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-07 17:24:37,973 INFO L225 Difference]: With dead ends: 122 [2025-02-07 17:24:37,973 INFO L226 Difference]: Without dead ends: 116 [2025-02-07 17:24:37,973 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 432 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=303, Invalid=1419, Unknown=0, NotChecked=0, Total=1722 [2025-02-07 17:24:37,974 INFO L435 NwaCegarLoop]: 6 mSDtfsCounter, 120 mSDsluCounter, 65 mSDsCounter, 0 mSdLazyCounter, 542 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 120 SdHoareTripleChecker+Valid, 71 SdHoareTripleChecker+Invalid, 573 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 542 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2025-02-07 17:24:37,974 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [120 Valid, 71 Invalid, 573 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 542 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2025-02-07 17:24:37,974 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2025-02-07 17:24:37,986 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 93. [2025-02-07 17:24:37,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 92 states have (on average 1.2717391304347827) internal successors, (117), 92 states have internal predecessors, (117), 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 17:24:37,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 117 transitions. [2025-02-07 17:24:37,987 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 117 transitions. Word has length 30 [2025-02-07 17:24:37,987 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-07 17:24:37,987 INFO L471 AbstractCegarLoop]: Abstraction has 93 states and 117 transitions. [2025-02-07 17:24:37,987 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 2.3214285714285716) internal successors, (65), 28 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 17:24:37,987 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 117 transitions. [2025-02-07 17:24:37,987 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2025-02-07 17:24:37,987 INFO L210 NwaCegarLoop]: Found error trace [2025-02-07 17:24:37,988 INFO L218 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-07 17:24:37,998 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2025-02-07 17:24:38,192 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 17:24:38,192 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-07 17:24:38,193 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-07 17:24:38,193 INFO L85 PathProgramCache]: Analyzing trace with hash -1182026579, now seen corresponding path program 5 times [2025-02-07 17:24:38,193 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-07 17:24:38,193 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [73071222] [2025-02-07 17:24:38,193 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-02-07 17:24:38,193 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-07 17:24:38,198 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 31 statements into 4 equivalence classes. [2025-02-07 17:24:38,204 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) and asserted 31 of 31 statements. [2025-02-07 17:24:38,205 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2025-02-07 17:24:38,205 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 17:24:38,273 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 6 proven. 16 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2025-02-07 17:24:38,274 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-07 17:24:38,274 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [73071222] [2025-02-07 17:24:38,274 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [73071222] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-07 17:24:38,274 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [815177747] [2025-02-07 17:24:38,274 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-02-07 17:24:38,274 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-07 17:24:38,274 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-07 17:24:38,276 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 17:24:38,278 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 17:24:38,323 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 31 statements into 4 equivalence classes. [2025-02-07 17:24:38,349 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) and asserted 31 of 31 statements. [2025-02-07 17:24:38,350 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2025-02-07 17:24:38,350 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 17:24:38,351 INFO L256 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 10 conjuncts are in the unsatisfiable core [2025-02-07 17:24:38,351 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-07 17:24:38,403 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 6 proven. 16 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2025-02-07 17:24:38,403 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-07 17:24:38,472 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 6 proven. 16 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2025-02-07 17:24:38,473 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [815177747] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-07 17:24:38,473 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-07 17:24:38,473 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 15 [2025-02-07 17:24:38,473 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1798923600] [2025-02-07 17:24:38,473 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-07 17:24:38,473 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2025-02-07 17:24:38,474 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-07 17:24:38,474 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2025-02-07 17:24:38,474 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2025-02-07 17:24:38,475 INFO L87 Difference]: Start difference. First operand 93 states and 117 transitions. Second operand has 15 states, 15 states have (on average 2.4) internal successors, (36), 15 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-07 17:24:38,705 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-07 17:24:38,706 INFO L93 Difference]: Finished difference Result 139 states and 173 transitions. [2025-02-07 17:24:38,706 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2025-02-07 17:24:38,706 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.4) internal successors, (36), 15 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2025-02-07 17:24:38,706 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-07 17:24:38,707 INFO L225 Difference]: With dead ends: 139 [2025-02-07 17:24:38,707 INFO L226 Difference]: Without dead ends: 123 [2025-02-07 17:24:38,707 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 49 SyntacticMatches, 9 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 157 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=149, Invalid=403, Unknown=0, NotChecked=0, Total=552 [2025-02-07 17:24:38,707 INFO L435 NwaCegarLoop]: 6 mSDtfsCounter, 56 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 399 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 422 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 399 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2025-02-07 17:24:38,707 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [56 Valid, 21 Invalid, 422 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 399 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2025-02-07 17:24:38,708 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2025-02-07 17:24:38,720 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 85. [2025-02-07 17:24:38,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 84 states have (on average 1.2738095238095237) internal successors, (107), 84 states have internal predecessors, (107), 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 17:24:38,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 107 transitions. [2025-02-07 17:24:38,721 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 107 transitions. Word has length 31 [2025-02-07 17:24:38,721 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-07 17:24:38,721 INFO L471 AbstractCegarLoop]: Abstraction has 85 states and 107 transitions. [2025-02-07 17:24:38,721 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.4) internal successors, (36), 15 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-07 17:24:38,721 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 107 transitions. [2025-02-07 17:24:38,722 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2025-02-07 17:24:38,722 INFO L210 NwaCegarLoop]: Found error trace [2025-02-07 17:24:38,722 INFO L218 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-07 17:24:38,728 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 17:24:38,922 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 17:24:38,923 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-07 17:24:38,923 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-07 17:24:38,923 INFO L85 PathProgramCache]: Analyzing trace with hash -1478956691, now seen corresponding path program 6 times [2025-02-07 17:24:38,923 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-07 17:24:38,924 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [199391489] [2025-02-07 17:24:38,924 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-02-07 17:24:38,924 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-07 17:24:38,930 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 33 statements into 5 equivalence classes. [2025-02-07 17:24:38,951 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) and asserted 33 of 33 statements. [2025-02-07 17:24:38,951 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2025-02-07 17:24:38,951 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 17:24:39,028 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 15 proven. 13 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2025-02-07 17:24:39,028 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-07 17:24:39,028 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [199391489] [2025-02-07 17:24:39,028 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [199391489] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-07 17:24:39,028 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1363811996] [2025-02-07 17:24:39,029 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-02-07 17:24:39,029 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-07 17:24:39,029 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-07 17:24:39,030 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 17:24:39,034 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 17:24:39,083 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 33 statements into 5 equivalence classes. [2025-02-07 17:24:39,109 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) and asserted 33 of 33 statements. [2025-02-07 17:24:39,109 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2025-02-07 17:24:39,110 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 17:24:39,110 INFO L256 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 10 conjuncts are in the unsatisfiable core [2025-02-07 17:24:39,111 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-07 17:24:39,177 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 22 proven. 6 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2025-02-07 17:24:39,177 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-07 17:24:39,229 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 22 proven. 6 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2025-02-07 17:24:39,230 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1363811996] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-07 17:24:39,230 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-07 17:24:39,230 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 17 [2025-02-07 17:24:39,230 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1313408396] [2025-02-07 17:24:39,230 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-07 17:24:39,230 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2025-02-07 17:24:39,230 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-07 17:24:39,231 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2025-02-07 17:24:39,231 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=197, Unknown=0, NotChecked=0, Total=272 [2025-02-07 17:24:39,231 INFO L87 Difference]: Start difference. First operand 85 states and 107 transitions. Second operand has 17 states, 17 states have (on average 2.588235294117647) internal successors, (44), 17 states have internal predecessors, (44), 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 17:24:39,351 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-07 17:24:39,351 INFO L93 Difference]: Finished difference Result 124 states and 152 transitions. [2025-02-07 17:24:39,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2025-02-07 17:24:39,352 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.588235294117647) internal successors, (44), 17 states have internal predecessors, (44), 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 17:24:39,352 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-07 17:24:39,352 INFO L225 Difference]: With dead ends: 124 [2025-02-07 17:24:39,352 INFO L226 Difference]: Without dead ends: 54 [2025-02-07 17:24:39,353 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 53 SyntacticMatches, 7 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 156 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=108, Invalid=272, Unknown=0, NotChecked=0, Total=380 [2025-02-07 17:24:39,353 INFO L435 NwaCegarLoop]: 7 mSDtfsCounter, 86 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 184 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 86 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 227 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 184 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-02-07 17:24:39,353 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [86 Valid, 23 Invalid, 227 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 184 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-02-07 17:24:39,353 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2025-02-07 17:24:39,359 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 49. [2025-02-07 17:24:39,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 48 states have (on average 1.2083333333333333) internal successors, (58), 48 states have internal predecessors, (58), 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 17:24:39,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 58 transitions. [2025-02-07 17:24:39,360 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 58 transitions. Word has length 33 [2025-02-07 17:24:39,360 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-07 17:24:39,360 INFO L471 AbstractCegarLoop]: Abstraction has 49 states and 58 transitions. [2025-02-07 17:24:39,360 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.588235294117647) internal successors, (44), 17 states have internal predecessors, (44), 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 17:24:39,360 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 58 transitions. [2025-02-07 17:24:39,360 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2025-02-07 17:24:39,360 INFO L210 NwaCegarLoop]: Found error trace [2025-02-07 17:24:39,360 INFO L218 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-07 17:24:39,368 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 17:24:39,567 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 17:24:39,569 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-07 17:24:39,570 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-07 17:24:39,570 INFO L85 PathProgramCache]: Analyzing trace with hash -1314561267, now seen corresponding path program 3 times [2025-02-07 17:24:39,572 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-07 17:24:39,572 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1531262917] [2025-02-07 17:24:39,572 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-02-07 17:24:39,572 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-07 17:24:39,623 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 37 statements into 5 equivalence classes. [2025-02-07 17:24:39,661 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) and asserted 37 of 37 statements. [2025-02-07 17:24:39,666 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2025-02-07 17:24:39,667 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 17:24:40,170 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2025-02-07 17:24:40,170 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-07 17:24:40,170 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1531262917] [2025-02-07 17:24:40,170 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1531262917] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-07 17:24:40,170 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1561370982] [2025-02-07 17:24:40,170 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-02-07 17:24:40,170 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-07 17:24:40,170 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-07 17:24:40,172 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 17:24:40,173 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 17:24:40,226 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 37 statements into 5 equivalence classes. [2025-02-07 17:24:40,257 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) and asserted 37 of 37 statements. [2025-02-07 17:24:40,257 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2025-02-07 17:24:40,257 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 17:24:40,258 INFO L256 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 45 conjuncts are in the unsatisfiable core [2025-02-07 17:24:40,260 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-07 17:24:40,265 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 17:24:40,416 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 17:24:40,521 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 17:24:40,672 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 17:24:40,861 INFO L349 Elim1Store]: treesize reduction 48, result has 2.0 percent of original size [2025-02-07 17:24:40,861 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 45 treesize of output 13 [2025-02-07 17:24:40,867 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 17:24:40,942 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 6 proven. 26 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2025-02-07 17:24:40,942 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-07 17:24:41,796 INFO L349 Elim1Store]: treesize reduction 48, result has 2.0 percent of original size [2025-02-07 17:24:41,796 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 49 treesize of output 17 [2025-02-07 17:24:42,107 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 6 proven. 26 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2025-02-07 17:24:42,107 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1561370982] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-07 17:24:42,107 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-07 17:24:42,108 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 21, 21] total 53 [2025-02-07 17:24:42,108 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1685446831] [2025-02-07 17:24:42,108 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-07 17:24:42,108 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2025-02-07 17:24:42,108 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-07 17:24:42,108 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2025-02-07 17:24:42,109 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=266, Invalid=2490, Unknown=0, NotChecked=0, Total=2756 [2025-02-07 17:24:42,109 INFO L87 Difference]: Start difference. First operand 49 states and 58 transitions. Second operand has 53 states, 53 states have (on average 1.471698113207547) internal successors, (78), 53 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 17:24:45,530 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-07 17:24:45,531 INFO L93 Difference]: Finished difference Result 149 states and 188 transitions. [2025-02-07 17:24:45,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2025-02-07 17:24:45,531 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 53 states have (on average 1.471698113207547) internal successors, (78), 53 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 37 [2025-02-07 17:24:45,531 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-07 17:24:45,532 INFO L225 Difference]: With dead ends: 149 [2025-02-07 17:24:45,532 INFO L226 Difference]: Without dead ends: 128 [2025-02-07 17:24:45,535 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 104 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2816 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=1299, Invalid=9831, Unknown=0, NotChecked=0, Total=11130 [2025-02-07 17:24:45,535 INFO L435 NwaCegarLoop]: 6 mSDtfsCounter, 185 mSDsluCounter, 86 mSDsCounter, 0 mSdLazyCounter, 1787 mSolverCounterSat, 227 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 185 SdHoareTripleChecker+Valid, 92 SdHoareTripleChecker+Invalid, 2014 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 227 IncrementalHoareTripleChecker+Valid, 1787 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2025-02-07 17:24:45,535 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [185 Valid, 92 Invalid, 2014 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [227 Valid, 1787 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2025-02-07 17:24:45,536 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2025-02-07 17:24:45,550 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 84. [2025-02-07 17:24:45,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 83 states have (on average 1.1927710843373494) internal successors, (99), 83 states have internal predecessors, (99), 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 17:24:45,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 99 transitions. [2025-02-07 17:24:45,551 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 99 transitions. Word has length 37 [2025-02-07 17:24:45,551 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-07 17:24:45,551 INFO L471 AbstractCegarLoop]: Abstraction has 84 states and 99 transitions. [2025-02-07 17:24:45,552 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 53 states have (on average 1.471698113207547) internal successors, (78), 53 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 17:24:45,552 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 99 transitions. [2025-02-07 17:24:45,553 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2025-02-07 17:24:45,553 INFO L210 NwaCegarLoop]: Found error trace [2025-02-07 17:24:45,553 INFO L218 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-07 17:24:45,559 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 17:24:45,757 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 17:24:45,757 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-07 17:24:45,758 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-07 17:24:45,758 INFO L85 PathProgramCache]: Analyzing trace with hash -316565393, now seen corresponding path program 3 times [2025-02-07 17:24:45,758 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-07 17:24:45,758 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [642942850] [2025-02-07 17:24:45,758 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-02-07 17:24:45,758 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-07 17:24:45,769 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 37 statements into 5 equivalence classes. [2025-02-07 17:24:45,793 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) and asserted 25 of 37 statements. [2025-02-07 17:24:45,793 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2025-02-07 17:24:45,793 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 17:24:46,174 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2025-02-07 17:24:46,174 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-07 17:24:46,174 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [642942850] [2025-02-07 17:24:46,175 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [642942850] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-07 17:24:46,175 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [517411611] [2025-02-07 17:24:46,175 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-02-07 17:24:46,175 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-07 17:24:46,175 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-07 17:24:46,177 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 17:24:46,181 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 17:24:46,239 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 37 statements into 5 equivalence classes. [2025-02-07 17:24:46,259 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) and asserted 25 of 37 statements. [2025-02-07 17:24:46,259 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2025-02-07 17:24:46,259 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 17:24:46,260 INFO L256 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 17 conjuncts are in the unsatisfiable core [2025-02-07 17:24:46,262 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-07 17:24:46,282 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 27 treesize of output 15 [2025-02-07 17:24:46,365 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-02-07 17:24:46,365 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 17:24:46,401 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 10 proven. 10 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2025-02-07 17:24:46,401 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-07 17:24:46,532 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 10 proven. 10 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2025-02-07 17:24:46,532 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [517411611] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-07 17:24:46,532 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-07 17:24:46,532 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 9, 9] total 26 [2025-02-07 17:24:46,532 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [550475108] [2025-02-07 17:24:46,532 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-07 17:24:46,533 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2025-02-07 17:24:46,533 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-07 17:24:46,533 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2025-02-07 17:24:46,534 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=562, Unknown=0, NotChecked=0, Total=650 [2025-02-07 17:24:46,534 INFO L87 Difference]: Start difference. First operand 84 states and 99 transitions. Second operand has 26 states, 26 states have (on average 1.8461538461538463) internal successors, (48), 26 states have internal predecessors, (48), 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 17:24:47,789 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-07 17:24:47,790 INFO L93 Difference]: Finished difference Result 220 states and 277 transitions. [2025-02-07 17:24:47,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2025-02-07 17:24:47,790 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.8461538461538463) internal successors, (48), 26 states have internal predecessors, (48), 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 17:24:47,790 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-07 17:24:47,791 INFO L225 Difference]: With dead ends: 220 [2025-02-07 17:24:47,791 INFO L226 Difference]: Without dead ends: 201 [2025-02-07 17:24:47,792 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 67 SyntacticMatches, 3 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1187 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1082, Invalid=3748, Unknown=0, NotChecked=0, Total=4830 [2025-02-07 17:24:47,793 INFO L435 NwaCegarLoop]: 13 mSDtfsCounter, 264 mSDsluCounter, 121 mSDsCounter, 0 mSdLazyCounter, 729 mSolverCounterSat, 144 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 264 SdHoareTripleChecker+Valid, 134 SdHoareTripleChecker+Invalid, 873 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 144 IncrementalHoareTripleChecker+Valid, 729 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2025-02-07 17:24:47,793 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [264 Valid, 134 Invalid, 873 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [144 Valid, 729 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2025-02-07 17:24:47,793 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 201 states. [2025-02-07 17:24:47,838 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 201 to 150. [2025-02-07 17:24:47,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 150 states, 149 states have (on average 1.2751677852348993) internal successors, (190), 149 states have internal predecessors, (190), 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 17:24:47,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 190 transitions. [2025-02-07 17:24:47,839 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 190 transitions. Word has length 37 [2025-02-07 17:24:47,839 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-07 17:24:47,839 INFO L471 AbstractCegarLoop]: Abstraction has 150 states and 190 transitions. [2025-02-07 17:24:47,839 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.8461538461538463) internal successors, (48), 26 states have internal predecessors, (48), 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 17:24:47,839 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 190 transitions. [2025-02-07 17:24:47,840 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2025-02-07 17:24:47,840 INFO L210 NwaCegarLoop]: Found error trace [2025-02-07 17:24:47,840 INFO L218 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-07 17:24:47,846 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 17:24:48,044 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 17:24:48,044 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-07 17:24:48,045 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-07 17:24:48,045 INFO L85 PathProgramCache]: Analyzing trace with hash 1521862039, now seen corresponding path program 3 times [2025-02-07 17:24:48,045 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-07 17:24:48,045 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1914146485] [2025-02-07 17:24:48,045 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-02-07 17:24:48,045 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-07 17:24:48,051 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 38 statements into 5 equivalence classes. [2025-02-07 17:24:48,059 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) and asserted 38 of 38 statements. [2025-02-07 17:24:48,060 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2025-02-07 17:24:48,060 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 17:24:48,153 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 6 proven. 31 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2025-02-07 17:24:48,153 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-07 17:24:48,153 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1914146485] [2025-02-07 17:24:48,153 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1914146485] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-07 17:24:48,153 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [769267719] [2025-02-07 17:24:48,153 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-02-07 17:24:48,153 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-07 17:24:48,154 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-07 17:24:48,155 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 17:24:48,167 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 17:24:48,235 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 38 statements into 5 equivalence classes. [2025-02-07 17:24:48,285 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) and asserted 38 of 38 statements. [2025-02-07 17:24:48,285 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2025-02-07 17:24:48,285 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 17:24:48,286 INFO L256 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 15 conjuncts are in the unsatisfiable core [2025-02-07 17:24:48,287 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-07 17:24:48,400 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 20 proven. 27 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2025-02-07 17:24:48,401 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-07 17:24:48,520 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 10 proven. 37 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2025-02-07 17:24:48,521 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [769267719] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-07 17:24:48,521 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-07 17:24:48,521 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 15, 15] total 24 [2025-02-07 17:24:48,521 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [480046483] [2025-02-07 17:24:48,521 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-07 17:24:48,521 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2025-02-07 17:24:48,521 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-07 17:24:48,522 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2025-02-07 17:24:48,523 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=399, Unknown=0, NotChecked=0, Total=552 [2025-02-07 17:24:48,523 INFO L87 Difference]: Start difference. First operand 150 states and 190 transitions. Second operand has 24 states, 24 states have (on average 2.3333333333333335) internal successors, (56), 24 states have internal predecessors, (56), 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 17:24:48,844 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-07 17:24:48,844 INFO L93 Difference]: Finished difference Result 234 states and 297 transitions. [2025-02-07 17:24:48,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2025-02-07 17:24:48,845 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.3333333333333335) internal successors, (56), 24 states have internal predecessors, (56), 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 38 [2025-02-07 17:24:48,845 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-07 17:24:48,846 INFO L225 Difference]: With dead ends: 234 [2025-02-07 17:24:48,846 INFO L226 Difference]: Without dead ends: 193 [2025-02-07 17:24:48,847 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 55 SyntacticMatches, 10 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 410 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=285, Invalid=837, Unknown=0, NotChecked=0, Total=1122 [2025-02-07 17:24:48,848 INFO L435 NwaCegarLoop]: 6 mSDtfsCounter, 108 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 534 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 108 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 583 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 534 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2025-02-07 17:24:48,849 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [108 Valid, 19 Invalid, 583 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 534 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2025-02-07 17:24:48,853 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2025-02-07 17:24:48,877 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 126. [2025-02-07 17:24:48,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 126 states, 125 states have (on average 1.264) internal successors, (158), 125 states have internal predecessors, (158), 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 17:24:48,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 158 transitions. [2025-02-07 17:24:48,878 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 158 transitions. Word has length 38 [2025-02-07 17:24:48,878 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-07 17:24:48,878 INFO L471 AbstractCegarLoop]: Abstraction has 126 states and 158 transitions. [2025-02-07 17:24:48,878 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.3333333333333335) internal successors, (56), 24 states have internal predecessors, (56), 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 17:24:48,878 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 158 transitions. [2025-02-07 17:24:48,879 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2025-02-07 17:24:48,879 INFO L210 NwaCegarLoop]: Found error trace [2025-02-07 17:24:48,879 INFO L218 NwaCegarLoop]: trace histogram [6, 6, 6, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-07 17:24:48,887 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2025-02-07 17:24:49,079 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 17:24:49,080 INFO L396 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-07 17:24:49,080 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-07 17:24:49,080 INFO L85 PathProgramCache]: Analyzing trace with hash -1212597362, now seen corresponding path program 7 times [2025-02-07 17:24:49,080 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-07 17:24:49,080 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2146258668] [2025-02-07 17:24:49,080 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-02-07 17:24:49,080 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-07 17:24:49,091 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 43 statements into 1 equivalence classes. [2025-02-07 17:24:49,096 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 43 of 43 statements. [2025-02-07 17:24:49,096 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-07 17:24:49,096 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 17:24:49,219 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 38 proven. 23 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2025-02-07 17:24:49,219 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-07 17:24:49,219 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2146258668] [2025-02-07 17:24:49,219 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2146258668] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-07 17:24:49,219 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [971289999] [2025-02-07 17:24:49,219 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-02-07 17:24:49,220 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-07 17:24:49,220 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-07 17:24:49,221 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 17:24:49,225 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 17:24:49,285 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 43 statements into 1 equivalence classes. [2025-02-07 17:24:49,305 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 43 of 43 statements. [2025-02-07 17:24:49,305 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-07 17:24:49,306 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 17:24:49,307 INFO L256 TraceCheckSpWp]: Trace formula consists of 227 conjuncts, 12 conjuncts are in the unsatisfiable core [2025-02-07 17:24:49,307 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-07 17:24:49,401 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 48 proven. 10 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2025-02-07 17:24:49,402 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-07 17:24:49,473 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 48 proven. 10 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2025-02-07 17:24:49,474 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [971289999] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-07 17:24:49,474 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-07 17:24:49,474 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 21 [2025-02-07 17:24:49,475 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [224221766] [2025-02-07 17:24:49,475 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-07 17:24:49,475 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2025-02-07 17:24:49,475 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-07 17:24:49,475 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2025-02-07 17:24:49,476 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=312, Unknown=0, NotChecked=0, Total=420 [2025-02-07 17:24:49,476 INFO L87 Difference]: Start difference. First operand 126 states and 158 transitions. Second operand has 21 states, 21 states have (on average 2.6666666666666665) internal successors, (56), 21 states have internal predecessors, (56), 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 17:24:49,621 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-07 17:24:49,622 INFO L93 Difference]: Finished difference Result 162 states and 202 transitions. [2025-02-07 17:24:49,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2025-02-07 17:24:49,622 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.6666666666666665) internal successors, (56), 21 states have internal predecessors, (56), 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 17:24:49,622 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-07 17:24:49,623 INFO L225 Difference]: With dead ends: 162 [2025-02-07 17:24:49,623 INFO L226 Difference]: Without dead ends: 88 [2025-02-07 17:24:49,624 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 70 SyntacticMatches, 9 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 256 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=158, Invalid=442, Unknown=0, NotChecked=0, Total=600 [2025-02-07 17:24:49,625 INFO L435 NwaCegarLoop]: 7 mSDtfsCounter, 74 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 202 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 74 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 240 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 202 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-02-07 17:24:49,625 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [74 Valid, 34 Invalid, 240 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 202 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-02-07 17:24:49,625 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2025-02-07 17:24:49,640 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 76. [2025-02-07 17:24:49,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 75 states have (on average 1.2533333333333334) internal successors, (94), 75 states have internal predecessors, (94), 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 17:24:49,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 94 transitions. [2025-02-07 17:24:49,641 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 94 transitions. Word has length 43 [2025-02-07 17:24:49,641 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-07 17:24:49,641 INFO L471 AbstractCegarLoop]: Abstraction has 76 states and 94 transitions. [2025-02-07 17:24:49,642 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.6666666666666665) internal successors, (56), 21 states have internal predecessors, (56), 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 17:24:49,642 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 94 transitions. [2025-02-07 17:24:49,642 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2025-02-07 17:24:49,642 INFO L210 NwaCegarLoop]: Found error trace [2025-02-07 17:24:49,642 INFO L218 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-07 17:24:49,648 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 17:24:49,842 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 17:24:49,843 INFO L396 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-07 17:24:49,843 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-07 17:24:49,843 INFO L85 PathProgramCache]: Analyzing trace with hash -2074309706, now seen corresponding path program 4 times [2025-02-07 17:24:49,843 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-07 17:24:49,843 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [664175852] [2025-02-07 17:24:49,843 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-02-07 17:24:49,843 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-07 17:24:49,850 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 44 statements into 2 equivalence classes. [2025-02-07 17:24:49,861 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) and asserted 41 of 44 statements. [2025-02-07 17:24:49,861 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) [2025-02-07 17:24:49,861 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 17:24:50,078 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 8 proven. 27 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2025-02-07 17:24:50,078 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-07 17:24:50,078 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [664175852] [2025-02-07 17:24:50,078 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [664175852] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-07 17:24:50,078 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [954502785] [2025-02-07 17:24:50,078 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-02-07 17:24:50,078 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-07 17:24:50,078 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-07 17:24:50,080 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 17:24:50,082 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 17:24:50,176 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 44 statements into 2 equivalence classes. [2025-02-07 17:24:50,192 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) and asserted 41 of 44 statements. [2025-02-07 17:24:50,192 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) [2025-02-07 17:24:50,192 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 17:24:50,193 INFO L256 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 50 conjuncts are in the unsatisfiable core [2025-02-07 17:24:50,194 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-07 17:24:50,198 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 17:24:50,244 INFO L349 Elim1Store]: treesize reduction 22, result has 42.1 percent of original size [2025-02-07 17:24:50,244 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 1 case distinctions, treesize of input 28 treesize of output 20 [2025-02-07 17:24:50,293 INFO L349 Elim1Store]: treesize reduction 24, result has 40.0 percent of original size [2025-02-07 17:24:50,293 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 1 case distinctions, treesize of input 36 treesize of output 24 [2025-02-07 17:24:50,356 INFO L349 Elim1Store]: treesize reduction 24, result has 40.0 percent of original size [2025-02-07 17:24:50,356 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 1 case distinctions, treesize of input 39 treesize of output 27 [2025-02-07 17:24:50,428 INFO L349 Elim1Store]: treesize reduction 24, result has 40.0 percent of original size [2025-02-07 17:24:50,428 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 1 case distinctions, treesize of input 42 treesize of output 30 [2025-02-07 17:24:50,534 INFO L349 Elim1Store]: treesize reduction 27, result has 38.6 percent of original size [2025-02-07 17:24:50,534 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 44 treesize of output 35 [2025-02-07 17:24:50,594 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 5 proven. 35 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2025-02-07 17:24:50,595 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-07 17:24:51,528 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 14 proven. 61 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2025-02-07 17:24:51,528 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [954502785] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-07 17:24:51,528 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-07 17:24:51,528 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 15, 21] total 43 [2025-02-07 17:24:51,529 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [988296115] [2025-02-07 17:24:51,529 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-07 17:24:51,529 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2025-02-07 17:24:51,529 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-07 17:24:51,529 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2025-02-07 17:24:51,529 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=245, Invalid=1561, Unknown=0, NotChecked=0, Total=1806 [2025-02-07 17:24:51,530 INFO L87 Difference]: Start difference. First operand 76 states and 94 transitions. Second operand has 43 states, 43 states have (on average 1.744186046511628) internal successors, (75), 43 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 17:25:06,247 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2025-02-07 17:25:24,347 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2025-02-07 17:25:33,111 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2025-02-07 17:25:43,640 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2025-02-07 17:25:52,400 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2025-02-07 17:26:00,652 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1]