./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/array-cav19/array_init_nondet_vars.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 551b0097 Calling Ultimate with: /root/.sdkman/candidates/java/21.0.5-tem/bin/java -Dosgi.configuration.area=/storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.6.800.v20240513-1750.jar -data @noDefault -ultimatedata /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/array-cav19/array_init_nondet_vars.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 b36a429fc2ac304c1da00c90b438bd7c9bbfb7e9d7c6704fc9e7805ab1ca424f --- Real Ultimate output --- This is Ultimate 0.3.0-?-551b009-m [2025-01-08 22:34:31,471 INFO L188 SettingsManager]: Resetting all preferences to default values... [2025-01-08 22:34:31,507 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2025-01-08 22:34:31,510 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2025-01-08 22:34:31,511 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2025-01-08 22:34:31,525 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2025-01-08 22:34:31,525 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2025-01-08 22:34:31,525 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2025-01-08 22:34:31,526 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2025-01-08 22:34:31,526 INFO L153 SettingsManager]: * Use memory slicer=true [2025-01-08 22:34:31,526 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2025-01-08 22:34:31,526 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2025-01-08 22:34:31,526 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2025-01-08 22:34:31,526 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2025-01-08 22:34:31,526 INFO L153 SettingsManager]: * Use SBE=true [2025-01-08 22:34:31,526 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2025-01-08 22:34:31,527 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2025-01-08 22:34:31,527 INFO L153 SettingsManager]: * sizeof long=4 [2025-01-08 22:34:31,527 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2025-01-08 22:34:31,527 INFO L153 SettingsManager]: * sizeof POINTER=4 [2025-01-08 22:34:31,527 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2025-01-08 22:34:31,527 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2025-01-08 22:34:31,527 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2025-01-08 22:34:31,527 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2025-01-08 22:34:31,527 INFO L153 SettingsManager]: * sizeof long double=12 [2025-01-08 22:34:31,527 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2025-01-08 22:34:31,527 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2025-01-08 22:34:31,528 INFO L153 SettingsManager]: * Use constant arrays=true [2025-01-08 22:34:31,528 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2025-01-08 22:34:31,528 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2025-01-08 22:34:31,528 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2025-01-08 22:34:31,528 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2025-01-08 22:34:31,528 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-01-08 22:34:31,528 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2025-01-08 22:34:31,528 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2025-01-08 22:34:31,528 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2025-01-08 22:34:31,528 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2025-01-08 22:34:31,528 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-01-08 22:34:31,529 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2025-01-08 22:34:31,529 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2025-01-08 22:34:31,529 INFO L153 SettingsManager]: * Compute procedure contracts=false [2025-01-08 22:34:31,529 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2025-01-08 22:34:31,529 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2025-01-08 22:34:31,529 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2025-01-08 22:34:31,529 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2025-01-08 22:34:31,529 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2025-01-08 22:34:31,529 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2025-01-08 22:34:31,529 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2025-01-08 22:34:31,529 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 -> b36a429fc2ac304c1da00c90b438bd7c9bbfb7e9d7c6704fc9e7805ab1ca424f [2025-01-08 22:34:31,726 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2025-01-08 22:34:31,736 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2025-01-08 22:34:31,738 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2025-01-08 22:34:31,740 INFO L270 PluginConnector]: Initializing CDTParser... [2025-01-08 22:34:31,740 INFO L274 PluginConnector]: CDTParser initialized [2025-01-08 22:34:31,740 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-cav19/array_init_nondet_vars.c [2025-01-08 22:34:32,899 INFO L533 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/6ba3675df/36c23b50774f40e48dc93ca80950a052/FLAG58f1b904d [2025-01-08 22:34:33,102 INFO L384 CDTParser]: Found 1 translation units. [2025-01-08 22:34:33,103 INFO L180 CDTParser]: Scanning /storage/repos/ultimate-jdk21/releaseScripts/default/sv-benchmarks/c/array-cav19/array_init_nondet_vars.c [2025-01-08 22:34:33,110 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/6ba3675df/36c23b50774f40e48dc93ca80950a052/FLAG58f1b904d [2025-01-08 22:34:33,472 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/6ba3675df/36c23b50774f40e48dc93ca80950a052 [2025-01-08 22:34:33,474 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2025-01-08 22:34:33,475 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2025-01-08 22:34:33,475 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2025-01-08 22:34:33,476 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2025-01-08 22:34:33,478 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2025-01-08 22:34:33,479 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 08.01 10:34:33" (1/1) ... [2025-01-08 22:34:33,480 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7b2aadb6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.01 10:34:33, skipping insertion in model container [2025-01-08 22:34:33,480 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 08.01 10:34:33" (1/1) ... [2025-01-08 22:34:33,488 INFO L175 MainTranslator]: Built tables and reachable declarations [2025-01-08 22:34:33,567 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-cav19/array_init_nondet_vars.c[413,426] [2025-01-08 22:34:33,576 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-01-08 22:34:33,581 INFO L200 MainTranslator]: Completed pre-run [2025-01-08 22:34:33,588 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-cav19/array_init_nondet_vars.c[413,426] [2025-01-08 22:34:33,591 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-01-08 22:34:33,603 INFO L204 MainTranslator]: Completed translation [2025-01-08 22:34:33,604 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.01 10:34:33 WrapperNode [2025-01-08 22:34:33,604 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2025-01-08 22:34:33,605 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2025-01-08 22:34:33,605 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2025-01-08 22:34:33,605 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2025-01-08 22:34:33,609 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.01 10:34:33" (1/1) ... [2025-01-08 22:34:33,613 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.01 10:34:33" (1/1) ... [2025-01-08 22:34:33,624 INFO L138 Inliner]: procedures = 15, calls = 16, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 51 [2025-01-08 22:34:33,626 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2025-01-08 22:34:33,626 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2025-01-08 22:34:33,626 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2025-01-08 22:34:33,626 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2025-01-08 22:34:33,631 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.01 10:34:33" (1/1) ... [2025-01-08 22:34:33,631 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.01 10:34:33" (1/1) ... [2025-01-08 22:34:33,637 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.01 10:34:33" (1/1) ... [2025-01-08 22:34:33,646 INFO L175 MemorySlicer]: Split 4 memory accesses to 2 slices as follows [2, 2]. 50 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0]. The 1 writes are split as follows [0, 1]. [2025-01-08 22:34:33,646 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.01 10:34:33" (1/1) ... [2025-01-08 22:34:33,647 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.01 10:34:33" (1/1) ... [2025-01-08 22:34:33,651 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.01 10:34:33" (1/1) ... [2025-01-08 22:34:33,656 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.01 10:34:33" (1/1) ... [2025-01-08 22:34:33,657 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.01 10:34:33" (1/1) ... [2025-01-08 22:34:33,658 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.01 10:34:33" (1/1) ... [2025-01-08 22:34:33,658 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.01 10:34:33" (1/1) ... [2025-01-08 22:34:33,659 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2025-01-08 22:34:33,660 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2025-01-08 22:34:33,660 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2025-01-08 22:34:33,660 INFO L274 PluginConnector]: RCFGBuilder initialized [2025-01-08 22:34:33,661 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.01 10:34:33" (1/1) ... [2025-01-08 22:34:33,665 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-01-08 22:34:33,673 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-08 22:34:33,682 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2025-01-08 22:34:33,692 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2025-01-08 22:34:33,704 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2025-01-08 22:34:33,705 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2025-01-08 22:34:33,705 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2025-01-08 22:34:33,705 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2025-01-08 22:34:33,705 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2025-01-08 22:34:33,705 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2025-01-08 22:34:33,705 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2025-01-08 22:34:33,706 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2025-01-08 22:34:33,706 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2025-01-08 22:34:33,706 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2025-01-08 22:34:33,706 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2025-01-08 22:34:33,706 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2025-01-08 22:34:33,706 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2025-01-08 22:34:33,757 INFO L234 CfgBuilder]: Building ICFG [2025-01-08 22:34:33,759 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2025-01-08 22:34:33,853 INFO L? ?]: Removed 9 outVars from TransFormulas that were not future-live. [2025-01-08 22:34:33,853 INFO L283 CfgBuilder]: Performing block encoding [2025-01-08 22:34:33,860 INFO L307 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2025-01-08 22:34:33,860 INFO L312 CfgBuilder]: Removed 0 assume(true) statements. [2025-01-08 22:34:33,861 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 08.01 10:34:33 BoogieIcfgContainer [2025-01-08 22:34:33,861 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2025-01-08 22:34:33,862 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2025-01-08 22:34:33,863 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2025-01-08 22:34:33,866 INFO L274 PluginConnector]: TraceAbstraction initialized [2025-01-08 22:34:33,866 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 08.01 10:34:33" (1/3) ... [2025-01-08 22:34:33,867 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1abaddf3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 08.01 10:34:33, skipping insertion in model container [2025-01-08 22:34:33,867 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.01 10:34:33" (2/3) ... [2025-01-08 22:34:33,867 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1abaddf3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 08.01 10:34:33, skipping insertion in model container [2025-01-08 22:34:33,867 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 08.01 10:34:33" (3/3) ... [2025-01-08 22:34:33,868 INFO L128 eAbstractionObserver]: Analyzing ICFG array_init_nondet_vars.c [2025-01-08 22:34:33,878 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2025-01-08 22:34:33,879 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG array_init_nondet_vars.c that has 2 procedures, 21 locations, 1 initial locations, 2 loop locations, and 1 error locations. [2025-01-08 22:34:33,914 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2025-01-08 22:34:33,922 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;@234a0c13, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2025-01-08 22:34:33,922 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2025-01-08 22:34:33,925 INFO L276 IsEmpty]: Start isEmpty. Operand has 21 states, 15 states have (on average 1.3333333333333333) internal successors, (20), 16 states have internal predecessors, (20), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2025-01-08 22:34:33,929 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2025-01-08 22:34:33,930 INFO L210 NwaCegarLoop]: Found error trace [2025-01-08 22:34:33,930 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-01-08 22:34:33,930 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-01-08 22:34:33,934 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-08 22:34:33,935 INFO L85 PathProgramCache]: Analyzing trace with hash 1305136913, now seen corresponding path program 1 times [2025-01-08 22:34:33,939 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-08 22:34:33,939 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [437740190] [2025-01-08 22:34:33,939 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-08 22:34:33,941 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-08 22:34:33,989 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 18 statements into 1 equivalence classes. [2025-01-08 22:34:33,997 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 18 of 18 statements. [2025-01-08 22:34:33,997 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-08 22:34:33,997 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-08 22:34:34,031 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-01-08 22:34:34,032 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-08 22:34:34,032 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [437740190] [2025-01-08 22:34:34,033 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [437740190] provided 0 perfect and 1 imperfect interpolant sequences [2025-01-08 22:34:34,033 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1692240713] [2025-01-08 22:34:34,033 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-08 22:34:34,033 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-08 22:34:34,033 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-08 22:34:34,036 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-01-08 22:34:34,037 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2025-01-08 22:34:34,080 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 18 statements into 1 equivalence classes. [2025-01-08 22:34:34,102 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 18 of 18 statements. [2025-01-08 22:34:34,102 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-08 22:34:34,102 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-08 22:34:34,105 INFO L256 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 1 conjuncts are in the unsatisfiable core [2025-01-08 22:34:34,107 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-08 22:34:34,115 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-01-08 22:34:34,115 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-01-08 22:34:34,115 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1692240713] provided 1 perfect and 0 imperfect interpolant sequences [2025-01-08 22:34:34,115 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2025-01-08 22:34:34,115 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [2] total 2 [2025-01-08 22:34:34,116 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [940735438] [2025-01-08 22:34:34,118 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-01-08 22:34:34,121 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2025-01-08 22:34:34,121 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-08 22:34:34,133 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2025-01-08 22:34:34,133 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2025-01-08 22:34:34,134 INFO L87 Difference]: Start difference. First operand has 21 states, 15 states have (on average 1.3333333333333333) internal successors, (20), 16 states have internal predecessors, (20), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 2 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2025-01-08 22:34:34,144 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-01-08 22:34:34,145 INFO L93 Difference]: Finished difference Result 39 states and 51 transitions. [2025-01-08 22:34:34,146 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2025-01-08 22:34:34,146 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 18 [2025-01-08 22:34:34,147 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-01-08 22:34:34,150 INFO L225 Difference]: With dead ends: 39 [2025-01-08 22:34:34,151 INFO L226 Difference]: Without dead ends: 18 [2025-01-08 22:34:34,153 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2025-01-08 22:34:34,155 INFO L435 NwaCegarLoop]: 24 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, 24 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 [2025-01-08 22:34:34,155 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-01-08 22:34:34,164 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2025-01-08 22:34:34,174 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2025-01-08 22:34:34,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 13 states have (on average 1.1538461538461537) internal successors, (15), 13 states have internal predecessors, (15), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2025-01-08 22:34:34,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 21 transitions. [2025-01-08 22:34:34,179 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 21 transitions. Word has length 18 [2025-01-08 22:34:34,179 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-01-08 22:34:34,179 INFO L471 AbstractCegarLoop]: Abstraction has 18 states and 21 transitions. [2025-01-08 22:34:34,179 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2025-01-08 22:34:34,179 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 21 transitions. [2025-01-08 22:34:34,180 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2025-01-08 22:34:34,181 INFO L210 NwaCegarLoop]: Found error trace [2025-01-08 22:34:34,181 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-01-08 22:34:34,186 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2025-01-08 22:34:34,385 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2025-01-08 22:34:34,386 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-01-08 22:34:34,387 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-08 22:34:34,387 INFO L85 PathProgramCache]: Analyzing trace with hash -515326963, now seen corresponding path program 1 times [2025-01-08 22:34:34,387 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-08 22:34:34,387 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1777215109] [2025-01-08 22:34:34,387 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-08 22:34:34,387 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-08 22:34:34,394 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 18 statements into 1 equivalence classes. [2025-01-08 22:34:34,406 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 18 of 18 statements. [2025-01-08 22:34:34,406 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-08 22:34:34,406 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-08 22:34:34,498 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2025-01-08 22:34:34,499 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-08 22:34:34,499 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1777215109] [2025-01-08 22:34:34,499 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1777215109] provided 1 perfect and 0 imperfect interpolant sequences [2025-01-08 22:34:34,499 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-01-08 22:34:34,499 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2025-01-08 22:34:34,499 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [557455486] [2025-01-08 22:34:34,499 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-01-08 22:34:34,500 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-01-08 22:34:34,500 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-08 22:34:34,500 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-01-08 22:34:34,500 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2025-01-08 22:34:34,501 INFO L87 Difference]: Start difference. First operand 18 states and 21 transitions. Second operand has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2025-01-08 22:34:34,526 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-01-08 22:34:34,526 INFO L93 Difference]: Finished difference Result 32 states and 37 transitions. [2025-01-08 22:34:34,526 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-01-08 22:34:34,526 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 18 [2025-01-08 22:34:34,527 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-01-08 22:34:34,527 INFO L225 Difference]: With dead ends: 32 [2025-01-08 22:34:34,527 INFO L226 Difference]: Without dead ends: 26 [2025-01-08 22:34:34,527 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2025-01-08 22:34:34,528 INFO L435 NwaCegarLoop]: 16 mSDtfsCounter, 5 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-01-08 22:34:34,528 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 42 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-01-08 22:34:34,528 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2025-01-08 22:34:34,531 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 19. [2025-01-08 22:34:34,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 14 states have (on average 1.1428571428571428) internal successors, (16), 14 states have internal predecessors, (16), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2025-01-08 22:34:34,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 22 transitions. [2025-01-08 22:34:34,532 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 22 transitions. Word has length 18 [2025-01-08 22:34:34,532 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-01-08 22:34:34,532 INFO L471 AbstractCegarLoop]: Abstraction has 19 states and 22 transitions. [2025-01-08 22:34:34,532 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2025-01-08 22:34:34,532 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 22 transitions. [2025-01-08 22:34:34,533 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2025-01-08 22:34:34,533 INFO L210 NwaCegarLoop]: Found error trace [2025-01-08 22:34:34,533 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-01-08 22:34:34,533 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2025-01-08 22:34:34,533 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-01-08 22:34:34,534 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-08 22:34:34,534 INFO L85 PathProgramCache]: Analyzing trace with hash 1960841404, now seen corresponding path program 1 times [2025-01-08 22:34:34,534 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-08 22:34:34,534 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1807614295] [2025-01-08 22:34:34,534 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-08 22:34:34,534 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-08 22:34:34,541 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 25 statements into 1 equivalence classes. [2025-01-08 22:34:34,558 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 25 of 25 statements. [2025-01-08 22:34:34,558 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-08 22:34:34,558 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-08 22:34:34,908 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-01-08 22:34:34,909 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-08 22:34:34,909 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1807614295] [2025-01-08 22:34:34,910 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1807614295] provided 0 perfect and 1 imperfect interpolant sequences [2025-01-08 22:34:34,910 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2065289833] [2025-01-08 22:34:34,910 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-08 22:34:34,910 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-08 22:34:34,911 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-08 22:34:34,912 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-01-08 22:34:34,914 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2025-01-08 22:34:34,946 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 25 statements into 1 equivalence classes. [2025-01-08 22:34:34,961 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 25 of 25 statements. [2025-01-08 22:34:34,961 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-08 22:34:34,962 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-08 22:34:34,964 INFO L256 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 26 conjuncts are in the unsatisfiable core [2025-01-08 22:34:34,967 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-08 22:34:35,146 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 [2025-01-08 22:34:35,219 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 [2025-01-08 22:34:35,242 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-01-08 22:34:35,242 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-01-08 22:34:35,293 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 [2025-01-08 22:34:35,297 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 20 treesize of output 16 [2025-01-08 22:34:35,433 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-01-08 22:34:35,434 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2065289833] provided 0 perfect and 2 imperfect interpolant sequences [2025-01-08 22:34:35,434 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-01-08 22:34:35,434 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 10] total 22 [2025-01-08 22:34:35,434 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [598520110] [2025-01-08 22:34:35,434 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-01-08 22:34:35,434 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2025-01-08 22:34:35,434 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-08 22:34:35,435 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2025-01-08 22:34:35,435 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=381, Unknown=0, NotChecked=0, Total=462 [2025-01-08 22:34:35,436 INFO L87 Difference]: Start difference. First operand 19 states and 22 transitions. Second operand has 22 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 16 states have internal predecessors, (30), 5 states have call successors, (6), 1 states have call predecessors, (6), 2 states have return successors, (7), 7 states have call predecessors, (7), 5 states have call successors, (7) [2025-01-08 22:34:35,592 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-01-08 22:34:35,592 INFO L93 Difference]: Finished difference Result 39 states and 45 transitions. [2025-01-08 22:34:35,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2025-01-08 22:34:35,594 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 16 states have internal predecessors, (30), 5 states have call successors, (6), 1 states have call predecessors, (6), 2 states have return successors, (7), 7 states have call predecessors, (7), 5 states have call successors, (7) Word has length 25 [2025-01-08 22:34:35,594 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-01-08 22:34:35,594 INFO L225 Difference]: With dead ends: 39 [2025-01-08 22:34:35,594 INFO L226 Difference]: Without dead ends: 37 [2025-01-08 22:34:35,595 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 39 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 110 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=122, Invalid=478, Unknown=0, NotChecked=0, Total=600 [2025-01-08 22:34:35,595 INFO L435 NwaCegarLoop]: 16 mSDtfsCounter, 48 mSDsluCounter, 122 mSDsCounter, 0 mSdLazyCounter, 143 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 138 SdHoareTripleChecker+Invalid, 149 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 143 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-01-08 22:34:35,595 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [49 Valid, 138 Invalid, 149 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 143 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-01-08 22:34:35,596 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2025-01-08 22:34:35,601 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 24. [2025-01-08 22:34:35,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 18 states have (on average 1.1666666666666667) internal successors, (21), 18 states have internal predecessors, (21), 4 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2025-01-08 22:34:35,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 29 transitions. [2025-01-08 22:34:35,602 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 29 transitions. Word has length 25 [2025-01-08 22:34:35,603 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-01-08 22:34:35,603 INFO L471 AbstractCegarLoop]: Abstraction has 24 states and 29 transitions. [2025-01-08 22:34:35,603 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 16 states have internal predecessors, (30), 5 states have call successors, (6), 1 states have call predecessors, (6), 2 states have return successors, (7), 7 states have call predecessors, (7), 5 states have call successors, (7) [2025-01-08 22:34:35,603 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 29 transitions. [2025-01-08 22:34:35,604 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2025-01-08 22:34:35,604 INFO L210 NwaCegarLoop]: Found error trace [2025-01-08 22:34:35,604 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-01-08 22:34:35,610 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2025-01-08 22:34:35,809 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-08 22:34:35,809 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-01-08 22:34:35,809 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-08 22:34:35,809 INFO L85 PathProgramCache]: Analyzing trace with hash -419141800, now seen corresponding path program 1 times [2025-01-08 22:34:35,809 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-08 22:34:35,809 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1374156718] [2025-01-08 22:34:35,809 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-08 22:34:35,810 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-08 22:34:35,815 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 28 statements into 1 equivalence classes. [2025-01-08 22:34:35,824 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 28 of 28 statements. [2025-01-08 22:34:35,828 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-08 22:34:35,828 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-08 22:34:35,889 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2025-01-08 22:34:35,889 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-08 22:34:35,889 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1374156718] [2025-01-08 22:34:35,889 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1374156718] provided 0 perfect and 1 imperfect interpolant sequences [2025-01-08 22:34:35,889 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2067405199] [2025-01-08 22:34:35,889 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-08 22:34:35,889 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-08 22:34:35,890 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-08 22:34:35,891 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-01-08 22:34:35,896 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2025-01-08 22:34:35,922 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 28 statements into 1 equivalence classes. [2025-01-08 22:34:35,932 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 28 of 28 statements. [2025-01-08 22:34:35,932 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-08 22:34:35,932 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-08 22:34:35,933 INFO L256 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 6 conjuncts are in the unsatisfiable core [2025-01-08 22:34:35,934 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-08 22:34:35,969 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2025-01-08 22:34:35,969 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-01-08 22:34:35,999 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2025-01-08 22:34:36,000 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2067405199] provided 0 perfect and 2 imperfect interpolant sequences [2025-01-08 22:34:36,000 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-01-08 22:34:36,000 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 10 [2025-01-08 22:34:36,000 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1551253060] [2025-01-08 22:34:36,000 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-01-08 22:34:36,000 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2025-01-08 22:34:36,000 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-08 22:34:36,001 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2025-01-08 22:34:36,001 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2025-01-08 22:34:36,001 INFO L87 Difference]: Start difference. First operand 24 states and 29 transitions. Second operand has 10 states, 10 states have (on average 2.8) internal successors, (28), 10 states have internal predecessors, (28), 3 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2025-01-08 22:34:36,039 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-01-08 22:34:36,039 INFO L93 Difference]: Finished difference Result 43 states and 49 transitions. [2025-01-08 22:34:36,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2025-01-08 22:34:36,040 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.8) internal successors, (28), 10 states have internal predecessors, (28), 3 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 28 [2025-01-08 22:34:36,040 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-01-08 22:34:36,040 INFO L225 Difference]: With dead ends: 43 [2025-01-08 22:34:36,040 INFO L226 Difference]: Without dead ends: 34 [2025-01-08 22:34:36,041 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 50 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2025-01-08 22:34:36,043 INFO L435 NwaCegarLoop]: 16 mSDtfsCounter, 9 mSDsluCounter, 58 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 74 SdHoareTripleChecker+Invalid, 49 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-01-08 22:34:36,044 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 74 Invalid, 49 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-01-08 22:34:36,044 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2025-01-08 22:34:36,049 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 22. [2025-01-08 22:34:36,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 16 states have (on average 1.125) internal successors, (18), 16 states have internal predecessors, (18), 4 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2025-01-08 22:34:36,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 26 transitions. [2025-01-08 22:34:36,050 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 26 transitions. Word has length 28 [2025-01-08 22:34:36,050 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-01-08 22:34:36,051 INFO L471 AbstractCegarLoop]: Abstraction has 22 states and 26 transitions. [2025-01-08 22:34:36,052 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.8) internal successors, (28), 10 states have internal predecessors, (28), 3 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2025-01-08 22:34:36,052 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 26 transitions. [2025-01-08 22:34:36,052 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2025-01-08 22:34:36,052 INFO L210 NwaCegarLoop]: Found error trace [2025-01-08 22:34:36,052 INFO L218 NwaCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-01-08 22:34:36,058 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2025-01-08 22:34:36,253 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-08 22:34:36,253 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-01-08 22:34:36,254 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-08 22:34:36,254 INFO L85 PathProgramCache]: Analyzing trace with hash -552605395, now seen corresponding path program 2 times [2025-01-08 22:34:36,254 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-08 22:34:36,254 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1088225527] [2025-01-08 22:34:36,254 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-01-08 22:34:36,254 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-08 22:34:36,261 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 32 statements into 2 equivalence classes. [2025-01-08 22:34:36,289 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 32 of 32 statements. [2025-01-08 22:34:36,289 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-01-08 22:34:36,289 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-08 22:34:36,592 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 6 proven. 11 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2025-01-08 22:34:36,592 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-08 22:34:36,593 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1088225527] [2025-01-08 22:34:36,593 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1088225527] provided 0 perfect and 1 imperfect interpolant sequences [2025-01-08 22:34:36,593 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1299132476] [2025-01-08 22:34:36,593 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-01-08 22:34:36,593 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-08 22:34:36,593 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-08 22:34:36,594 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-01-08 22:34:36,597 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2025-01-08 22:34:36,624 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 32 statements into 2 equivalence classes. [2025-01-08 22:34:36,636 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 32 of 32 statements. [2025-01-08 22:34:36,636 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-01-08 22:34:36,636 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-08 22:34:36,637 INFO L256 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 27 conjuncts are in the unsatisfiable core [2025-01-08 22:34:36,641 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-08 22:34:36,752 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 [2025-01-08 22:34:36,817 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 [2025-01-08 22:34:36,865 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 [2025-01-08 22:34:36,880 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 12 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-01-08 22:34:36,880 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-01-08 22:34:36,944 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 21 treesize of output 19 [2025-01-08 22:34:36,947 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 21 [2025-01-08 22:34:37,017 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 6 proven. 11 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2025-01-08 22:34:37,018 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1299132476] provided 0 perfect and 2 imperfect interpolant sequences [2025-01-08 22:34:37,018 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-01-08 22:34:37,018 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13, 11] total 22 [2025-01-08 22:34:37,018 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [690832503] [2025-01-08 22:34:37,018 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-01-08 22:34:37,018 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2025-01-08 22:34:37,018 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-08 22:34:37,019 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2025-01-08 22:34:37,019 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=388, Unknown=0, NotChecked=0, Total=462 [2025-01-08 22:34:37,019 INFO L87 Difference]: Start difference. First operand 22 states and 26 transitions. Second operand has 22 states, 21 states have (on average 1.619047619047619) internal successors, (34), 18 states have internal predecessors, (34), 6 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (7), 7 states have call predecessors, (7), 6 states have call successors, (7) [2025-01-08 22:34:41,209 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2025-01-08 22:34:45,230 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2025-01-08 22:34:45,230 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-01-08 22:34:45,230 INFO L93 Difference]: Finished difference Result 59 states and 67 transitions. [2025-01-08 22:34:45,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2025-01-08 22:34:45,235 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 21 states have (on average 1.619047619047619) internal successors, (34), 18 states have internal predecessors, (34), 6 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (7), 7 states have call predecessors, (7), 6 states have call successors, (7) Word has length 32 [2025-01-08 22:34:45,236 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-01-08 22:34:45,236 INFO L225 Difference]: With dead ends: 59 [2025-01-08 22:34:45,236 INFO L226 Difference]: Without dead ends: 57 [2025-01-08 22:34:45,237 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 50 SyntacticMatches, 5 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 176 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=145, Invalid=667, Unknown=0, NotChecked=0, Total=812 [2025-01-08 22:34:45,237 INFO L435 NwaCegarLoop]: 17 mSDtfsCounter, 176 mSDsluCounter, 119 mSDsCounter, 0 mSdLazyCounter, 156 mSolverCounterSat, 29 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 177 SdHoareTripleChecker+Valid, 136 SdHoareTripleChecker+Invalid, 187 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 156 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.1s IncrementalHoareTripleChecker+Time [2025-01-08 22:34:45,238 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [177 Valid, 136 Invalid, 187 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 156 Invalid, 2 Unknown, 0 Unchecked, 8.1s Time] [2025-01-08 22:34:45,238 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2025-01-08 22:34:45,242 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 35. [2025-01-08 22:34:45,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 25 states have (on average 1.16) internal successors, (29), 26 states have internal predecessors, (29), 7 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 6 states have call predecessors, (7), 7 states have call successors, (7) [2025-01-08 22:34:45,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 43 transitions. [2025-01-08 22:34:45,243 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 43 transitions. Word has length 32 [2025-01-08 22:34:45,243 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-01-08 22:34:45,243 INFO L471 AbstractCegarLoop]: Abstraction has 35 states and 43 transitions. [2025-01-08 22:34:45,243 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 21 states have (on average 1.619047619047619) internal successors, (34), 18 states have internal predecessors, (34), 6 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (7), 7 states have call predecessors, (7), 6 states have call successors, (7) [2025-01-08 22:34:45,243 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 43 transitions. [2025-01-08 22:34:45,244 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2025-01-08 22:34:45,244 INFO L210 NwaCegarLoop]: Found error trace [2025-01-08 22:34:45,244 INFO L218 NwaCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-01-08 22:34:45,259 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2025-01-08 22:34:45,448 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-08 22:34:45,448 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-01-08 22:34:45,448 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-08 22:34:45,448 INFO L85 PathProgramCache]: Analyzing trace with hash -52892345, now seen corresponding path program 2 times [2025-01-08 22:34:45,449 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-08 22:34:45,449 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [274821916] [2025-01-08 22:34:45,449 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-01-08 22:34:45,449 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-08 22:34:45,455 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 35 statements into 2 equivalence classes. [2025-01-08 22:34:45,480 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 35 of 35 statements. [2025-01-08 22:34:45,480 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-01-08 22:34:45,480 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-08 22:34:45,752 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 9 proven. 10 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2025-01-08 22:34:45,753 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-08 22:34:45,753 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [274821916] [2025-01-08 22:34:45,753 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [274821916] provided 0 perfect and 1 imperfect interpolant sequences [2025-01-08 22:34:45,753 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1366798136] [2025-01-08 22:34:45,753 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-01-08 22:34:45,753 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-08 22:34:45,753 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-08 22:34:45,755 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-01-08 22:34:45,758 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2025-01-08 22:34:45,783 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 35 statements into 2 equivalence classes. [2025-01-08 22:34:45,795 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 35 of 35 statements. [2025-01-08 22:34:45,795 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-01-08 22:34:45,795 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-08 22:34:45,796 INFO L256 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 36 conjuncts are in the unsatisfiable core [2025-01-08 22:34:45,798 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-08 22:34:45,944 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 19 treesize of output 1 [2025-01-08 22:34:46,024 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 19 treesize of output 7 [2025-01-08 22:34:46,039 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 3 proven. 13 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2025-01-08 22:34:46,039 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-01-08 22:34:46,102 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 [2025-01-08 22:34:46,105 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 20 treesize of output 16 [2025-01-08 22:34:46,297 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 9 proven. 10 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2025-01-08 22:34:46,298 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1366798136] provided 0 perfect and 2 imperfect interpolant sequences [2025-01-08 22:34:46,298 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-01-08 22:34:46,298 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13, 12] total 28 [2025-01-08 22:34:46,298 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1215374054] [2025-01-08 22:34:46,298 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-01-08 22:34:46,298 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2025-01-08 22:34:46,298 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-08 22:34:46,299 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2025-01-08 22:34:46,299 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=133, Invalid=623, Unknown=0, NotChecked=0, Total=756 [2025-01-08 22:34:46,299 INFO L87 Difference]: Start difference. First operand 35 states and 43 transitions. Second operand has 28 states, 28 states have (on average 1.5714285714285714) internal successors, (44), 22 states have internal predecessors, (44), 8 states have call successors, (9), 1 states have call predecessors, (9), 2 states have return successors, (11), 11 states have call predecessors, (11), 8 states have call successors, (11) [2025-01-08 22:34:46,641 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-01-08 22:34:46,642 INFO L93 Difference]: Finished difference Result 59 states and 69 transitions. [2025-01-08 22:34:46,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2025-01-08 22:34:46,642 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.5714285714285714) internal successors, (44), 22 states have internal predecessors, (44), 8 states have call successors, (9), 1 states have call predecessors, (9), 2 states have return successors, (11), 11 states have call predecessors, (11), 8 states have call successors, (11) Word has length 35 [2025-01-08 22:34:46,642 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-01-08 22:34:46,644 INFO L225 Difference]: With dead ends: 59 [2025-01-08 22:34:46,644 INFO L226 Difference]: Without dead ends: 57 [2025-01-08 22:34:46,644 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 298 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=268, Invalid=1064, Unknown=0, NotChecked=0, Total=1332 [2025-01-08 22:34:46,645 INFO L435 NwaCegarLoop]: 17 mSDtfsCounter, 97 mSDsluCounter, 161 mSDsCounter, 0 mSdLazyCounter, 301 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 97 SdHoareTripleChecker+Valid, 178 SdHoareTripleChecker+Invalid, 326 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 301 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2025-01-08 22:34:46,645 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [97 Valid, 178 Invalid, 326 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 301 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2025-01-08 22:34:46,645 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2025-01-08 22:34:46,650 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 44. [2025-01-08 22:34:46,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 34 states have (on average 1.1176470588235294) internal successors, (38), 35 states have internal predecessors, (38), 7 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 6 states have call predecessors, (7), 7 states have call successors, (7) [2025-01-08 22:34:46,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 52 transitions. [2025-01-08 22:34:46,651 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 52 transitions. Word has length 35 [2025-01-08 22:34:46,651 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-01-08 22:34:46,651 INFO L471 AbstractCegarLoop]: Abstraction has 44 states and 52 transitions. [2025-01-08 22:34:46,651 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 1.5714285714285714) internal successors, (44), 22 states have internal predecessors, (44), 8 states have call successors, (9), 1 states have call predecessors, (9), 2 states have return successors, (11), 11 states have call predecessors, (11), 8 states have call successors, (11) [2025-01-08 22:34:46,651 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 52 transitions. [2025-01-08 22:34:46,652 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2025-01-08 22:34:46,652 INFO L210 NwaCegarLoop]: Found error trace [2025-01-08 22:34:46,652 INFO L218 NwaCegarLoop]: trace histogram [5, 5, 5, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-01-08 22:34:46,661 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2025-01-08 22:34:46,856 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-08 22:34:46,856 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-01-08 22:34:46,856 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-08 22:34:46,856 INFO L85 PathProgramCache]: Analyzing trace with hash 1745726584, now seen corresponding path program 3 times [2025-01-08 22:34:46,857 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-08 22:34:46,857 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1811967256] [2025-01-08 22:34:46,857 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-01-08 22:34:46,857 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-08 22:34:46,864 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 42 statements into 5 equivalence classes. [2025-01-08 22:34:46,884 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) and asserted 42 of 42 statements. [2025-01-08 22:34:46,885 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2025-01-08 22:34:46,885 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-08 22:34:47,257 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 9 proven. 23 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2025-01-08 22:34:47,257 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-08 22:34:47,257 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1811967256] [2025-01-08 22:34:47,257 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1811967256] provided 0 perfect and 1 imperfect interpolant sequences [2025-01-08 22:34:47,258 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [260168991] [2025-01-08 22:34:47,258 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-01-08 22:34:47,258 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-08 22:34:47,258 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-08 22:34:47,259 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-01-08 22:34:47,261 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2025-01-08 22:34:47,298 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 42 statements into 5 equivalence classes. [2025-01-08 22:34:47,315 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) and asserted 42 of 42 statements. [2025-01-08 22:34:47,316 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2025-01-08 22:34:47,316 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-08 22:34:47,318 INFO L256 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 39 conjuncts are in the unsatisfiable core [2025-01-08 22:34:47,321 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-08 22:34:47,480 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 19 treesize of output 1 [2025-01-08 22:34:47,569 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 29 treesize of output 13 [2025-01-08 22:34:47,626 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 19 treesize of output 7 [2025-01-08 22:34:47,641 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 10 proven. 29 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2025-01-08 22:34:47,642 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-01-08 22:34:47,732 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [260168991] provided 0 perfect and 1 imperfect interpolant sequences [2025-01-08 22:34:47,732 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2025-01-08 22:34:47,732 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 15] total 23 [2025-01-08 22:34:47,732 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1351184453] [2025-01-08 22:34:47,732 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2025-01-08 22:34:47,733 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2025-01-08 22:34:47,733 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-08 22:34:47,733 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2025-01-08 22:34:47,734 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=553, Unknown=0, NotChecked=0, Total=650 [2025-01-08 22:34:47,735 INFO L87 Difference]: Start difference. First operand 44 states and 52 transitions. Second operand has 23 states, 23 states have (on average 1.6521739130434783) internal successors, (38), 19 states have internal predecessors, (38), 8 states have call successors, (9), 2 states have call predecessors, (9), 3 states have return successors, (10), 10 states have call predecessors, (10), 8 states have call successors, (10) [2025-01-08 22:34:51,765 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2025-01-08 22:34:55,821 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2025-01-08 22:35:00,097 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2025-01-08 22:35:04,135 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2025-01-08 22:35:04,136 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-01-08 22:35:04,136 INFO L93 Difference]: Finished difference Result 93 states and 101 transitions. [2025-01-08 22:35:04,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2025-01-08 22:35:04,142 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.6521739130434783) internal successors, (38), 19 states have internal predecessors, (38), 8 states have call successors, (9), 2 states have call predecessors, (9), 3 states have return successors, (10), 10 states have call predecessors, (10), 8 states have call successors, (10) Word has length 42 [2025-01-08 22:35:04,142 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-01-08 22:35:04,143 INFO L225 Difference]: With dead ends: 93 [2025-01-08 22:35:04,143 INFO L226 Difference]: Without dead ends: 91 [2025-01-08 22:35:04,144 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 39 SyntacticMatches, 2 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 259 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=187, Invalid=935, Unknown=0, NotChecked=0, Total=1122 [2025-01-08 22:35:04,144 INFO L435 NwaCegarLoop]: 22 mSDtfsCounter, 184 mSDsluCounter, 195 mSDsCounter, 0 mSdLazyCounter, 307 mSolverCounterSat, 34 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 16.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 185 SdHoareTripleChecker+Valid, 217 SdHoareTripleChecker+Invalid, 345 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 307 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 16.2s IncrementalHoareTripleChecker+Time [2025-01-08 22:35:04,144 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [185 Valid, 217 Invalid, 345 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 307 Invalid, 4 Unknown, 0 Unchecked, 16.2s Time] [2025-01-08 22:35:04,144 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2025-01-08 22:35:04,163 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 57. [2025-01-08 22:35:04,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 44 states have (on average 1.1363636363636365) internal successors, (50), 45 states have internal predecessors, (50), 8 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (8), 7 states have call predecessors, (8), 8 states have call successors, (8) [2025-01-08 22:35:04,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 66 transitions. [2025-01-08 22:35:04,164 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 66 transitions. Word has length 42 [2025-01-08 22:35:04,164 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-01-08 22:35:04,164 INFO L471 AbstractCegarLoop]: Abstraction has 57 states and 66 transitions. [2025-01-08 22:35:04,165 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.6521739130434783) internal successors, (38), 19 states have internal predecessors, (38), 8 states have call successors, (9), 2 states have call predecessors, (9), 3 states have return successors, (10), 10 states have call predecessors, (10), 8 states have call successors, (10) [2025-01-08 22:35:04,165 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 66 transitions. [2025-01-08 22:35:04,165 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2025-01-08 22:35:04,165 INFO L210 NwaCegarLoop]: Found error trace [2025-01-08 22:35:04,165 INFO L218 NwaCegarLoop]: trace histogram [6, 6, 6, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-01-08 22:35:04,180 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2025-01-08 22:35:04,371 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,SelfDestructingSolverStorable6 [2025-01-08 22:35:04,372 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-01-08 22:35:04,373 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-08 22:35:04,373 INFO L85 PathProgramCache]: Analyzing trace with hash -2119066035, now seen corresponding path program 3 times [2025-01-08 22:35:04,373 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-08 22:35:04,373 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1027095350] [2025-01-08 22:35:04,373 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-01-08 22:35:04,373 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-08 22:35:04,381 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 46 statements into 6 equivalence classes. [2025-01-08 22:35:04,403 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) and asserted 46 of 46 statements. [2025-01-08 22:35:04,403 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2025-01-08 22:35:04,403 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-08 22:35:04,790 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 9 proven. 37 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2025-01-08 22:35:04,790 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-08 22:35:04,790 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1027095350] [2025-01-08 22:35:04,790 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1027095350] provided 0 perfect and 1 imperfect interpolant sequences [2025-01-08 22:35:04,790 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2108625698] [2025-01-08 22:35:04,790 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-01-08 22:35:04,790 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-08 22:35:04,791 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-08 22:35:04,794 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-01-08 22:35:04,797 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2025-01-08 22:35:04,823 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 46 statements into 6 equivalence classes. [2025-01-08 22:35:04,842 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) and asserted 46 of 46 statements. [2025-01-08 22:35:04,842 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2025-01-08 22:35:04,842 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-08 22:35:04,843 INFO L256 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 30 conjuncts are in the unsatisfiable core [2025-01-08 22:35:04,846 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-08 22:35:04,910 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2025-01-08 22:35:04,971 INFO L349 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2025-01-08 22:35:04,971 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 33 treesize of output 13 [2025-01-08 22:35:05,028 INFO L349 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2025-01-08 22:35:05,029 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 13 [2025-01-08 22:35:05,105 INFO L349 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2025-01-08 22:35:05,105 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 33 treesize of output 13 [2025-01-08 22:35:05,119 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 19 treesize of output 7 [2025-01-08 22:35:05,134 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 33 proven. 31 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2025-01-08 22:35:05,135 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-01-08 22:35:05,279 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 20 treesize of output 18 [2025-01-08 22:35:05,286 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 24 treesize of output 20 [2025-01-08 22:35:05,354 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 6 proven. 37 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2025-01-08 22:35:05,355 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2108625698] provided 0 perfect and 2 imperfect interpolant sequences [2025-01-08 22:35:05,355 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-01-08 22:35:05,356 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14, 12] total 21 [2025-01-08 22:35:05,356 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [368512875] [2025-01-08 22:35:05,356 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-01-08 22:35:05,356 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2025-01-08 22:35:05,356 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-08 22:35:05,356 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2025-01-08 22:35:05,357 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=350, Unknown=0, NotChecked=0, Total=420 [2025-01-08 22:35:05,357 INFO L87 Difference]: Start difference. First operand 57 states and 66 transitions. Second operand has 21 states, 21 states have (on average 1.8571428571428572) internal successors, (39), 17 states have internal predecessors, (39), 7 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (11), 9 states have call predecessors, (11), 7 states have call successors, (11) [2025-01-08 22:35:05,583 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-01-08 22:35:05,584 INFO L93 Difference]: Finished difference Result 81 states and 89 transitions. [2025-01-08 22:35:05,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2025-01-08 22:35:05,584 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.8571428571428572) internal successors, (39), 17 states have internal predecessors, (39), 7 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (11), 9 states have call predecessors, (11), 7 states have call successors, (11) Word has length 46 [2025-01-08 22:35:05,584 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-01-08 22:35:05,585 INFO L225 Difference]: With dead ends: 81 [2025-01-08 22:35:05,585 INFO L226 Difference]: Without dead ends: 79 [2025-01-08 22:35:05,585 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 75 SyntacticMatches, 11 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 230 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=133, Invalid=623, Unknown=0, NotChecked=0, Total=756 [2025-01-08 22:35:05,586 INFO L435 NwaCegarLoop]: 19 mSDtfsCounter, 64 mSDsluCounter, 150 mSDsCounter, 0 mSdLazyCounter, 300 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 169 SdHoareTripleChecker+Invalid, 310 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 300 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-01-08 22:35:05,586 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [64 Valid, 169 Invalid, 310 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 300 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-01-08 22:35:05,586 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2025-01-08 22:35:05,591 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 54. [2025-01-08 22:35:05,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 42 states have (on average 1.119047619047619) internal successors, (47), 42 states have internal predecessors, (47), 7 states have call successors, (7), 4 states have call predecessors, (7), 4 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2025-01-08 22:35:05,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 61 transitions. [2025-01-08 22:35:05,592 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 61 transitions. Word has length 46 [2025-01-08 22:35:05,592 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-01-08 22:35:05,592 INFO L471 AbstractCegarLoop]: Abstraction has 54 states and 61 transitions. [2025-01-08 22:35:05,592 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.8571428571428572) internal successors, (39), 17 states have internal predecessors, (39), 7 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (11), 9 states have call predecessors, (11), 7 states have call successors, (11) [2025-01-08 22:35:05,592 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 61 transitions. [2025-01-08 22:35:05,593 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2025-01-08 22:35:05,593 INFO L210 NwaCegarLoop]: Found error trace [2025-01-08 22:35:05,593 INFO L218 NwaCegarLoop]: trace histogram [5, 5, 5, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-01-08 22:35:05,598 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2025-01-08 22:35:05,793 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-08 22:35:05,794 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-01-08 22:35:05,794 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-08 22:35:05,794 INFO L85 PathProgramCache]: Analyzing trace with hash -813538788, now seen corresponding path program 4 times [2025-01-08 22:35:05,794 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-08 22:35:05,794 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [820917505] [2025-01-08 22:35:05,794 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-01-08 22:35:05,794 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-08 22:35:05,799 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 45 statements into 2 equivalence classes. [2025-01-08 22:35:05,809 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 45 of 45 statements. [2025-01-08 22:35:05,809 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-01-08 22:35:05,809 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-08 22:35:06,085 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 15 proven. 22 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2025-01-08 22:35:06,086 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-08 22:35:06,086 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [820917505] [2025-01-08 22:35:06,086 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [820917505] provided 0 perfect and 1 imperfect interpolant sequences [2025-01-08 22:35:06,086 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2068482840] [2025-01-08 22:35:06,086 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-01-08 22:35:06,086 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-08 22:35:06,086 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-08 22:35:06,088 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-01-08 22:35:06,089 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2025-01-08 22:35:06,116 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 45 statements into 2 equivalence classes. [2025-01-08 22:35:06,130 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 45 of 45 statements. [2025-01-08 22:35:06,130 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-01-08 22:35:06,130 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-08 22:35:06,130 INFO L256 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 39 conjuncts are in the unsatisfiable core [2025-01-08 22:35:06,132 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-08 22:35:06,290 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 [2025-01-08 22:35:06,415 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 [2025-01-08 22:35:06,432 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 12 proven. 25 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2025-01-08 22:35:06,432 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-01-08 22:35:06,527 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 [2025-01-08 22:35:06,530 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 20 treesize of output 16 [2025-01-08 22:35:06,714 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 12 proven. 25 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2025-01-08 22:35:06,715 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2068482840] provided 0 perfect and 2 imperfect interpolant sequences [2025-01-08 22:35:06,715 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-01-08 22:35:06,715 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15, 14] total 34 [2025-01-08 22:35:06,715 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1177185075] [2025-01-08 22:35:06,715 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-01-08 22:35:06,715 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2025-01-08 22:35:06,715 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-08 22:35:06,716 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2025-01-08 22:35:06,716 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=987, Unknown=0, NotChecked=0, Total=1122 [2025-01-08 22:35:06,716 INFO L87 Difference]: Start difference. First operand 54 states and 61 transitions. Second operand has 34 states, 33 states have (on average 1.8181818181818181) internal successors, (60), 29 states have internal predecessors, (60), 11 states have call successors, (12), 1 states have call predecessors, (12), 2 states have return successors, (12), 12 states have call predecessors, (12), 11 states have call successors, (12) [2025-01-08 22:35:07,389 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-01-08 22:35:07,390 INFO L93 Difference]: Finished difference Result 89 states and 98 transitions. [2025-01-08 22:35:07,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2025-01-08 22:35:07,390 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 33 states have (on average 1.8181818181818181) internal successors, (60), 29 states have internal predecessors, (60), 11 states have call successors, (12), 1 states have call predecessors, (12), 2 states have return successors, (12), 12 states have call predecessors, (12), 11 states have call successors, (12) Word has length 45 [2025-01-08 22:35:07,390 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-01-08 22:35:07,391 INFO L225 Difference]: With dead ends: 89 [2025-01-08 22:35:07,391 INFO L226 Difference]: Without dead ends: 61 [2025-01-08 22:35:07,392 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 71 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 510 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=344, Invalid=1912, Unknown=0, NotChecked=0, Total=2256 [2025-01-08 22:35:07,393 INFO L435 NwaCegarLoop]: 20 mSDtfsCounter, 120 mSDsluCounter, 284 mSDsCounter, 0 mSdLazyCounter, 651 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 121 SdHoareTripleChecker+Valid, 304 SdHoareTripleChecker+Invalid, 680 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 651 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2025-01-08 22:35:07,394 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [121 Valid, 304 Invalid, 680 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 651 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2025-01-08 22:35:07,395 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2025-01-08 22:35:07,401 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 48. [2025-01-08 22:35:07,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 36 states have (on average 1.0833333333333333) internal successors, (39), 36 states have internal predecessors, (39), 7 states have call successors, (7), 4 states have call predecessors, (7), 4 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2025-01-08 22:35:07,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 53 transitions. [2025-01-08 22:35:07,402 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 53 transitions. Word has length 45 [2025-01-08 22:35:07,402 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-01-08 22:35:07,402 INFO L471 AbstractCegarLoop]: Abstraction has 48 states and 53 transitions. [2025-01-08 22:35:07,403 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 33 states have (on average 1.8181818181818181) internal successors, (60), 29 states have internal predecessors, (60), 11 states have call successors, (12), 1 states have call predecessors, (12), 2 states have return successors, (12), 12 states have call predecessors, (12), 11 states have call successors, (12) [2025-01-08 22:35:07,403 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 53 transitions. [2025-01-08 22:35:07,404 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2025-01-08 22:35:07,404 INFO L210 NwaCegarLoop]: Found error trace [2025-01-08 22:35:07,404 INFO L218 NwaCegarLoop]: trace histogram [6, 6, 6, 4, 4, 4, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-01-08 22:35:07,409 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2025-01-08 22:35:07,604 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,9 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-08 22:35:07,605 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-01-08 22:35:07,605 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-08 22:35:07,605 INFO L85 PathProgramCache]: Analyzing trace with hash -354772979, now seen corresponding path program 5 times [2025-01-08 22:35:07,605 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-08 22:35:07,605 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [467327314] [2025-01-08 22:35:07,606 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-01-08 22:35:07,606 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-08 22:35:07,611 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 52 statements into 6 equivalence classes. [2025-01-08 22:35:07,627 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) and asserted 52 of 52 statements. [2025-01-08 22:35:07,627 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2025-01-08 22:35:07,627 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-08 22:35:07,888 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 12 proven. 41 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2025-01-08 22:35:07,889 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-08 22:35:07,889 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [467327314] [2025-01-08 22:35:07,889 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [467327314] provided 0 perfect and 1 imperfect interpolant sequences [2025-01-08 22:35:07,889 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [336588749] [2025-01-08 22:35:07,889 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-01-08 22:35:07,889 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-08 22:35:07,889 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-08 22:35:07,891 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-01-08 22:35:07,909 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2025-01-08 22:35:07,942 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 52 statements into 6 equivalence classes. [2025-01-08 22:35:07,961 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) and asserted 52 of 52 statements. [2025-01-08 22:35:07,961 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2025-01-08 22:35:07,961 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-08 22:35:07,962 INFO L256 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 34 conjuncts are in the unsatisfiable core [2025-01-08 22:35:07,965 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-08 22:35:08,127 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 [2025-01-08 22:35:08,203 INFO L190 IndexEqualityManager]: detected not equals via solver [2025-01-08 22:35:08,203 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 27 treesize of output 11 [2025-01-08 22:35:08,308 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 [2025-01-08 22:35:08,325 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 26 proven. 41 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2025-01-08 22:35:08,325 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-01-08 22:35:08,412 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 21 treesize of output 19 [2025-01-08 22:35:08,415 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 21 [2025-01-08 22:35:08,502 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 12 proven. 41 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2025-01-08 22:35:08,503 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [336588749] provided 0 perfect and 2 imperfect interpolant sequences [2025-01-08 22:35:08,503 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-01-08 22:35:08,503 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 17, 15] total 29 [2025-01-08 22:35:08,503 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [713742892] [2025-01-08 22:35:08,503 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-01-08 22:35:08,503 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2025-01-08 22:35:08,503 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-08 22:35:08,504 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2025-01-08 22:35:08,504 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=705, Unknown=0, NotChecked=0, Total=812 [2025-01-08 22:35:08,504 INFO L87 Difference]: Start difference. First operand 48 states and 53 transitions. Second operand has 29 states, 28 states have (on average 1.8928571428571428) internal successors, (53), 25 states have internal predecessors, (53), 10 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (11), 11 states have call predecessors, (11), 10 states have call successors, (11) [2025-01-08 22:35:12,558 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2025-01-08 22:35:16,587 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2025-01-08 22:35:16,792 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-01-08 22:35:16,792 INFO L93 Difference]: Finished difference Result 65 states and 69 transitions. [2025-01-08 22:35:16,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2025-01-08 22:35:16,793 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 28 states have (on average 1.8928571428571428) internal successors, (53), 25 states have internal predecessors, (53), 10 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (11), 11 states have call predecessors, (11), 10 states have call successors, (11) Word has length 52 [2025-01-08 22:35:16,793 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-01-08 22:35:16,794 INFO L225 Difference]: With dead ends: 65 [2025-01-08 22:35:16,794 INFO L226 Difference]: Without dead ends: 63 [2025-01-08 22:35:16,794 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 84 SyntacticMatches, 8 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 331 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=180, Invalid=1080, Unknown=0, NotChecked=0, Total=1260 [2025-01-08 22:35:16,794 INFO L435 NwaCegarLoop]: 21 mSDtfsCounter, 55 mSDsluCounter, 210 mSDsCounter, 0 mSdLazyCounter, 394 mSolverCounterSat, 8 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 231 SdHoareTripleChecker+Invalid, 404 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 394 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.2s IncrementalHoareTripleChecker+Time [2025-01-08 22:35:16,795 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [55 Valid, 231 Invalid, 404 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 394 Invalid, 2 Unknown, 0 Unchecked, 8.2s Time] [2025-01-08 22:35:16,799 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2025-01-08 22:35:16,820 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 60. [2025-01-08 22:35:16,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 47 states have (on average 1.0851063829787233) internal successors, (51), 47 states have internal predecessors, (51), 7 states have call successors, (7), 5 states have call predecessors, (7), 5 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2025-01-08 22:35:16,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 65 transitions. [2025-01-08 22:35:16,825 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 65 transitions. Word has length 52 [2025-01-08 22:35:16,825 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-01-08 22:35:16,825 INFO L471 AbstractCegarLoop]: Abstraction has 60 states and 65 transitions. [2025-01-08 22:35:16,825 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 28 states have (on average 1.8928571428571428) internal successors, (53), 25 states have internal predecessors, (53), 10 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (11), 11 states have call predecessors, (11), 10 states have call successors, (11) [2025-01-08 22:35:16,825 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 65 transitions. [2025-01-08 22:35:16,825 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2025-01-08 22:35:16,825 INFO L210 NwaCegarLoop]: Found error trace [2025-01-08 22:35:16,826 INFO L218 NwaCegarLoop]: trace histogram [7, 7, 7, 5, 5, 5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-01-08 22:35:16,835 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2025-01-08 22:35:17,026 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,10 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-08 22:35:17,026 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-01-08 22:35:17,027 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-08 22:35:17,027 INFO L85 PathProgramCache]: Analyzing trace with hash 1147632024, now seen corresponding path program 6 times [2025-01-08 22:35:17,027 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-08 22:35:17,027 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [5751474] [2025-01-08 22:35:17,027 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-01-08 22:35:17,027 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-08 22:35:17,036 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 56 statements into 7 equivalence classes. [2025-01-08 22:35:17,055 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) and asserted 56 of 56 statements. [2025-01-08 22:35:17,056 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2025-01-08 22:35:17,056 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-08 22:35:17,438 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 12 proven. 55 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2025-01-08 22:35:17,438 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-08 22:35:17,438 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [5751474] [2025-01-08 22:35:17,438 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [5751474] provided 0 perfect and 1 imperfect interpolant sequences [2025-01-08 22:35:17,438 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [238422573] [2025-01-08 22:35:17,438 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-01-08 22:35:17,438 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-08 22:35:17,438 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-08 22:35:17,443 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-01-08 22:35:17,444 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2025-01-08 22:35:17,479 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 56 statements into 7 equivalence classes. [2025-01-08 22:35:17,505 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) and asserted 56 of 56 statements. [2025-01-08 22:35:17,505 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2025-01-08 22:35:17,505 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-08 22:35:17,506 INFO L256 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 36 conjuncts are in the unsatisfiable core [2025-01-08 22:35:17,508 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-08 22:35:17,643 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 [2025-01-08 22:35:17,754 INFO L190 IndexEqualityManager]: detected not equals via solver [2025-01-08 22:35:17,755 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 27 treesize of output 11 [2025-01-08 22:35:17,829 INFO L190 IndexEqualityManager]: detected not equals via solver [2025-01-08 22:35:17,829 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 27 treesize of output 11 [2025-01-08 22:35:17,908 INFO L190 IndexEqualityManager]: detected not equals via solver [2025-01-08 22:35:17,909 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 27 treesize of output 11 [2025-01-08 22:35:17,984 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 [2025-01-08 22:35:18,000 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 48 proven. 49 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2025-01-08 22:35:18,000 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-01-08 22:35:18,167 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 20 treesize of output 18 [2025-01-08 22:35:18,170 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 24 treesize of output 20 [2025-01-08 22:35:18,254 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 9 proven. 55 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2025-01-08 22:35:18,254 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [238422573] provided 0 perfect and 2 imperfect interpolant sequences [2025-01-08 22:35:18,254 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-01-08 22:35:18,254 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 17, 14] total 30 [2025-01-08 22:35:18,254 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1424253316] [2025-01-08 22:35:18,254 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-01-08 22:35:18,255 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2025-01-08 22:35:18,255 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-08 22:35:18,255 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2025-01-08 22:35:18,255 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=745, Unknown=0, NotChecked=0, Total=870 [2025-01-08 22:35:18,256 INFO L87 Difference]: Start difference. First operand 60 states and 65 transitions. Second operand has 30 states, 29 states have (on average 1.9655172413793103) internal successors, (57), 26 states have internal predecessors, (57), 12 states have call successors, (13), 2 states have call predecessors, (13), 3 states have return successors, (13), 13 states have call predecessors, (13), 12 states have call successors, (13) [2025-01-08 22:35:22,313 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] [2025-01-08 22:35:22,596 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-01-08 22:35:22,596 INFO L93 Difference]: Finished difference Result 68 states and 72 transitions. [2025-01-08 22:35:22,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2025-01-08 22:35:22,596 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 29 states have (on average 1.9655172413793103) internal successors, (57), 26 states have internal predecessors, (57), 12 states have call successors, (13), 2 states have call predecessors, (13), 3 states have return successors, (13), 13 states have call predecessors, (13), 12 states have call successors, (13) Word has length 56 [2025-01-08 22:35:22,597 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-01-08 22:35:22,597 INFO L225 Difference]: With dead ends: 68 [2025-01-08 22:35:22,597 INFO L226 Difference]: Without dead ends: 66 [2025-01-08 22:35:22,598 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 87 SyntacticMatches, 12 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 470 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=217, Invalid=1189, Unknown=0, NotChecked=0, Total=1406 [2025-01-08 22:35:22,598 INFO L435 NwaCegarLoop]: 23 mSDtfsCounter, 52 mSDsluCounter, 248 mSDsCounter, 0 mSdLazyCounter, 474 mSolverCounterSat, 9 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 271 SdHoareTripleChecker+Invalid, 484 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 474 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.2s IncrementalHoareTripleChecker+Time [2025-01-08 22:35:22,599 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [52 Valid, 271 Invalid, 484 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 474 Invalid, 1 Unknown, 0 Unchecked, 4.2s Time] [2025-01-08 22:35:22,599 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2025-01-08 22:35:22,605 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 48. [2025-01-08 22:35:22,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 37 states have (on average 1.054054054054054) internal successors, (39), 37 states have internal predecessors, (39), 6 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2025-01-08 22:35:22,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 51 transitions. [2025-01-08 22:35:22,606 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 51 transitions. Word has length 56 [2025-01-08 22:35:22,606 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-01-08 22:35:22,606 INFO L471 AbstractCegarLoop]: Abstraction has 48 states and 51 transitions. [2025-01-08 22:35:22,606 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 29 states have (on average 1.9655172413793103) internal successors, (57), 26 states have internal predecessors, (57), 12 states have call successors, (13), 2 states have call predecessors, (13), 3 states have return successors, (13), 13 states have call predecessors, (13), 12 states have call successors, (13) [2025-01-08 22:35:22,607 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 51 transitions. [2025-01-08 22:35:22,607 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2025-01-08 22:35:22,607 INFO L210 NwaCegarLoop]: Found error trace [2025-01-08 22:35:22,607 INFO L218 NwaCegarLoop]: trace histogram [6, 6, 6, 4, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-01-08 22:35:22,617 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2025-01-08 22:35:22,809 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,11 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-08 22:35:22,810 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-01-08 22:35:22,810 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-08 22:35:22,810 INFO L85 PathProgramCache]: Analyzing trace with hash 877482599, now seen corresponding path program 7 times [2025-01-08 22:35:22,810 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-08 22:35:22,810 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1782148050] [2025-01-08 22:35:22,810 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-01-08 22:35:22,810 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-08 22:35:22,815 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 55 statements into 1 equivalence classes. [2025-01-08 22:35:22,824 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 55 of 55 statements. [2025-01-08 22:35:22,824 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-08 22:35:22,824 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-08 22:35:23,133 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 15 proven. 46 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2025-01-08 22:35:23,133 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-08 22:35:23,133 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1782148050] [2025-01-08 22:35:23,133 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1782148050] provided 0 perfect and 1 imperfect interpolant sequences [2025-01-08 22:35:23,133 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [930060217] [2025-01-08 22:35:23,133 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-01-08 22:35:23,133 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-08 22:35:23,133 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-08 22:35:23,139 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-01-08 22:35:23,143 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2025-01-08 22:35:23,176 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 55 statements into 1 equivalence classes. [2025-01-08 22:35:23,190 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 55 of 55 statements. [2025-01-08 22:35:23,190 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-08 22:35:23,190 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-08 22:35:23,191 INFO L256 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 43 conjuncts are in the unsatisfiable core [2025-01-08 22:35:23,194 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-08 22:35:23,387 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 [2025-01-08 22:35:23,545 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 [2025-01-08 22:35:23,561 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 15 proven. 46 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2025-01-08 22:35:23,561 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-01-08 22:35:23,661 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 [2025-01-08 22:35:23,663 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 20 treesize of output 16 [2025-01-08 22:35:23,862 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 15 proven. 46 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2025-01-08 22:35:23,862 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [930060217] provided 0 perfect and 2 imperfect interpolant sequences [2025-01-08 22:35:23,862 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-01-08 22:35:23,862 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 18, 17] total 39 [2025-01-08 22:35:23,862 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1599181522] [2025-01-08 22:35:23,863 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-01-08 22:35:23,863 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2025-01-08 22:35:23,863 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-08 22:35:23,863 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2025-01-08 22:35:23,864 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=165, Invalid=1317, Unknown=0, NotChecked=0, Total=1482 [2025-01-08 22:35:23,864 INFO L87 Difference]: Start difference. First operand 48 states and 51 transitions. Second operand has 39 states, 38 states have (on average 1.8421052631578947) internal successors, (70), 33 states have internal predecessors, (70), 14 states have call successors, (15), 1 states have call predecessors, (15), 2 states have return successors, (16), 16 states have call predecessors, (16), 14 states have call successors, (16) [2025-01-08 22:35:24,284 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-01-08 22:35:24,284 INFO L93 Difference]: Finished difference Result 78 states and 84 transitions. [2025-01-08 22:35:24,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2025-01-08 22:35:24,285 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 38 states have (on average 1.8421052631578947) internal successors, (70), 33 states have internal predecessors, (70), 14 states have call successors, (15), 1 states have call predecessors, (15), 2 states have return successors, (16), 16 states have call predecessors, (16), 14 states have call successors, (16) Word has length 55 [2025-01-08 22:35:24,285 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-01-08 22:35:24,285 INFO L225 Difference]: With dead ends: 78 [2025-01-08 22:35:24,285 INFO L226 Difference]: Without dead ends: 76 [2025-01-08 22:35:24,286 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 84 SyntacticMatches, 5 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 551 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=265, Invalid=1805, Unknown=0, NotChecked=0, Total=2070 [2025-01-08 22:35:24,286 INFO L435 NwaCegarLoop]: 21 mSDtfsCounter, 118 mSDsluCounter, 298 mSDsCounter, 0 mSdLazyCounter, 665 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 119 SdHoareTripleChecker+Valid, 319 SdHoareTripleChecker+Invalid, 685 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 665 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2025-01-08 22:35:24,286 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [119 Valid, 319 Invalid, 685 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 665 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2025-01-08 22:35:24,287 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2025-01-08 22:35:24,292 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 54. [2025-01-08 22:35:24,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 42 states have (on average 1.0714285714285714) internal successors, (45), 42 states have internal predecessors, (45), 7 states have call successors, (7), 4 states have call predecessors, (7), 4 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2025-01-08 22:35:24,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 59 transitions. [2025-01-08 22:35:24,292 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 59 transitions. Word has length 55 [2025-01-08 22:35:24,293 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-01-08 22:35:24,293 INFO L471 AbstractCegarLoop]: Abstraction has 54 states and 59 transitions. [2025-01-08 22:35:24,293 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 38 states have (on average 1.8421052631578947) internal successors, (70), 33 states have internal predecessors, (70), 14 states have call successors, (15), 1 states have call predecessors, (15), 2 states have return successors, (16), 16 states have call predecessors, (16), 14 states have call successors, (16) [2025-01-08 22:35:24,293 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 59 transitions. [2025-01-08 22:35:24,293 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2025-01-08 22:35:24,293 INFO L210 NwaCegarLoop]: Found error trace [2025-01-08 22:35:24,294 INFO L218 NwaCegarLoop]: trace histogram [6, 6, 6, 5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-01-08 22:35:24,299 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2025-01-08 22:35:24,498 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,SelfDestructingSolverStorable11 [2025-01-08 22:35:24,498 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-01-08 22:35:24,498 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-08 22:35:24,498 INFO L85 PathProgramCache]: Analyzing trace with hash 1917927885, now seen corresponding path program 8 times [2025-01-08 22:35:24,499 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-08 22:35:24,499 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1129131042] [2025-01-08 22:35:24,499 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-01-08 22:35:24,499 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-08 22:35:24,503 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 58 statements into 2 equivalence classes. [2025-01-08 22:35:24,507 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 58 of 58 statements. [2025-01-08 22:35:24,507 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-01-08 22:35:24,507 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-08 22:35:24,589 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 16 proven. 32 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2025-01-08 22:35:24,590 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-08 22:35:24,590 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1129131042] [2025-01-08 22:35:24,590 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1129131042] provided 0 perfect and 1 imperfect interpolant sequences [2025-01-08 22:35:24,590 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [109180285] [2025-01-08 22:35:24,590 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-01-08 22:35:24,590 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-08 22:35:24,590 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-08 22:35:24,592 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-01-08 22:35:24,596 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2025-01-08 22:35:24,632 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 58 statements into 2 equivalence classes. [2025-01-08 22:35:24,647 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 58 of 58 statements. [2025-01-08 22:35:24,647 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-01-08 22:35:24,647 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-08 22:35:24,648 INFO L256 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 12 conjuncts are in the unsatisfiable core [2025-01-08 22:35:24,648 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-08 22:35:24,736 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 26 proven. 22 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2025-01-08 22:35:24,736 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-01-08 22:35:24,816 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 26 proven. 22 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2025-01-08 22:35:24,817 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [109180285] provided 0 perfect and 2 imperfect interpolant sequences [2025-01-08 22:35:24,817 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-01-08 22:35:24,817 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 19 [2025-01-08 22:35:24,817 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1749485052] [2025-01-08 22:35:24,817 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-01-08 22:35:24,817 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2025-01-08 22:35:24,817 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-08 22:35:24,818 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2025-01-08 22:35:24,818 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=249, Unknown=0, NotChecked=0, Total=342 [2025-01-08 22:35:24,818 INFO L87 Difference]: Start difference. First operand 54 states and 59 transitions. Second operand has 19 states, 19 states have (on average 2.736842105263158) internal successors, (52), 19 states have internal predecessors, (52), 6 states have call successors, (7), 1 states have call predecessors, (7), 1 states have return successors, (7), 6 states have call predecessors, (7), 6 states have call successors, (7) [2025-01-08 22:35:24,903 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-01-08 22:35:24,903 INFO L93 Difference]: Finished difference Result 82 states and 88 transitions. [2025-01-08 22:35:24,903 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2025-01-08 22:35:24,903 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.736842105263158) internal successors, (52), 19 states have internal predecessors, (52), 6 states have call successors, (7), 1 states have call predecessors, (7), 1 states have return successors, (7), 6 states have call predecessors, (7), 6 states have call successors, (7) Word has length 58 [2025-01-08 22:35:24,903 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-01-08 22:35:24,904 INFO L225 Difference]: With dead ends: 82 [2025-01-08 22:35:24,904 INFO L226 Difference]: Without dead ends: 64 [2025-01-08 22:35:24,904 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 101 SyntacticMatches, 8 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 203 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=139, Invalid=367, Unknown=0, NotChecked=0, Total=506 [2025-01-08 22:35:24,904 INFO L435 NwaCegarLoop]: 19 mSDtfsCounter, 25 mSDsluCounter, 111 mSDsCounter, 0 mSdLazyCounter, 98 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 130 SdHoareTripleChecker+Invalid, 109 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 98 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-01-08 22:35:24,904 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [26 Valid, 130 Invalid, 109 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 98 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-01-08 22:35:24,905 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2025-01-08 22:35:24,925 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 51. [2025-01-08 22:35:24,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 39 states have (on average 1.0512820512820513) internal successors, (41), 39 states have internal predecessors, (41), 7 states have call successors, (7), 4 states have call predecessors, (7), 4 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2025-01-08 22:35:24,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 55 transitions. [2025-01-08 22:35:24,925 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 55 transitions. Word has length 58 [2025-01-08 22:35:24,926 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-01-08 22:35:24,926 INFO L471 AbstractCegarLoop]: Abstraction has 51 states and 55 transitions. [2025-01-08 22:35:24,926 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.736842105263158) internal successors, (52), 19 states have internal predecessors, (52), 6 states have call successors, (7), 1 states have call predecessors, (7), 1 states have return successors, (7), 6 states have call predecessors, (7), 6 states have call successors, (7) [2025-01-08 22:35:24,926 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 55 transitions. [2025-01-08 22:35:24,927 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2025-01-08 22:35:24,927 INFO L210 NwaCegarLoop]: Found error trace [2025-01-08 22:35:24,927 INFO L218 NwaCegarLoop]: trace histogram [7, 7, 7, 5, 5, 5, 5, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-01-08 22:35:24,939 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2025-01-08 22:35:25,127 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,13 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-08 22:35:25,128 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-01-08 22:35:25,129 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-08 22:35:25,129 INFO L85 PathProgramCache]: Analyzing trace with hash -2047635688, now seen corresponding path program 9 times [2025-01-08 22:35:25,129 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-08 22:35:25,129 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [242329984] [2025-01-08 22:35:25,129 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-01-08 22:35:25,129 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-08 22:35:25,137 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 62 statements into 7 equivalence classes. [2025-01-08 22:35:25,153 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) and asserted 62 of 62 statements. [2025-01-08 22:35:25,156 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2025-01-08 22:35:25,157 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-08 22:35:25,435 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 15 proven. 65 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2025-01-08 22:35:25,436 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-08 22:35:25,436 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [242329984] [2025-01-08 22:35:25,436 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [242329984] provided 0 perfect and 1 imperfect interpolant sequences [2025-01-08 22:35:25,436 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [164157777] [2025-01-08 22:35:25,436 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-01-08 22:35:25,436 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-08 22:35:25,436 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-08 22:35:25,438 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-01-08 22:35:25,439 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2025-01-08 22:35:25,493 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 62 statements into 7 equivalence classes. [2025-01-08 22:35:25,532 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) and asserted 62 of 62 statements. [2025-01-08 22:35:25,533 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2025-01-08 22:35:25,533 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-08 22:35:25,534 INFO L256 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 44 conjuncts are in the unsatisfiable core [2025-01-08 22:35:25,537 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-08 22:35:25,681 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 19 treesize of output 1 [2025-01-08 22:35:25,784 INFO L349 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2025-01-08 22:35:25,784 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 33 treesize of output 13 [2025-01-08 22:35:25,900 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 19 treesize of output 7 [2025-01-08 22:35:25,921 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 33 proven. 65 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2025-01-08 22:35:25,922 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-01-08 22:35:26,036 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 21 treesize of output 19 [2025-01-08 22:35:26,039 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 21 [2025-01-08 22:35:26,137 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 15 proven. 65 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2025-01-08 22:35:26,137 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [164157777] provided 0 perfect and 2 imperfect interpolant sequences [2025-01-08 22:35:26,138 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-01-08 22:35:26,138 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 19, 18] total 33 [2025-01-08 22:35:26,138 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [220524314] [2025-01-08 22:35:26,138 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-01-08 22:35:26,138 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2025-01-08 22:35:26,138 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-08 22:35:26,138 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2025-01-08 22:35:26,139 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=939, Unknown=0, NotChecked=0, Total=1056 [2025-01-08 22:35:26,139 INFO L87 Difference]: Start difference. First operand 51 states and 55 transitions. Second operand has 33 states, 33 states have (on average 1.9393939393939394) internal successors, (64), 29 states have internal predecessors, (64), 11 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (13), 13 states have call predecessors, (13), 11 states have call successors, (13) [2025-01-08 22:35:30,213 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] [2025-01-08 22:35:34,256 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2025-01-08 22:35:38,291 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2025-01-08 22:35:38,582 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-01-08 22:35:38,582 INFO L93 Difference]: Finished difference Result 61 states and 64 transitions. [2025-01-08 22:35:38,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2025-01-08 22:35:38,582 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.9393939393939394) internal successors, (64), 29 states have internal predecessors, (64), 11 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (13), 13 states have call predecessors, (13), 11 states have call successors, (13) Word has length 62 [2025-01-08 22:35:38,583 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-01-08 22:35:38,583 INFO L225 Difference]: With dead ends: 61 [2025-01-08 22:35:38,583 INFO L226 Difference]: Without dead ends: 59 [2025-01-08 22:35:38,584 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 103 SyntacticMatches, 7 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 481 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=206, Invalid=1516, Unknown=0, NotChecked=0, Total=1722 [2025-01-08 22:35:38,584 INFO L435 NwaCegarLoop]: 20 mSDtfsCounter, 45 mSDsluCounter, 282 mSDsCounter, 0 mSdLazyCounter, 643 mSolverCounterSat, 10 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 12.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 302 SdHoareTripleChecker+Invalid, 656 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 643 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 12.3s IncrementalHoareTripleChecker+Time [2025-01-08 22:35:38,584 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [45 Valid, 302 Invalid, 656 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 643 Invalid, 3 Unknown, 0 Unchecked, 12.3s Time] [2025-01-08 22:35:38,584 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2025-01-08 22:35:38,589 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 58. [2025-01-08 22:35:38,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 45 states have (on average 1.0444444444444445) internal successors, (47), 45 states have internal predecessors, (47), 7 states have call successors, (7), 5 states have call predecessors, (7), 5 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2025-01-08 22:35:38,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 61 transitions. [2025-01-08 22:35:38,590 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 61 transitions. Word has length 62 [2025-01-08 22:35:38,590 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-01-08 22:35:38,590 INFO L471 AbstractCegarLoop]: Abstraction has 58 states and 61 transitions. [2025-01-08 22:35:38,591 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 1.9393939393939394) internal successors, (64), 29 states have internal predecessors, (64), 11 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (13), 13 states have call predecessors, (13), 11 states have call successors, (13) [2025-01-08 22:35:38,591 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 61 transitions. [2025-01-08 22:35:38,591 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2025-01-08 22:35:38,591 INFO L210 NwaCegarLoop]: Found error trace [2025-01-08 22:35:38,591 INFO L218 NwaCegarLoop]: trace histogram [7, 7, 7, 5, 5, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-01-08 22:35:38,598 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 [2025-01-08 22:35:38,795 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,14 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-08 22:35:38,795 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-01-08 22:35:38,795 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-08 22:35:38,795 INFO L85 PathProgramCache]: Analyzing trace with hash 310508412, now seen corresponding path program 10 times [2025-01-08 22:35:38,795 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-08 22:35:38,795 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2039364378] [2025-01-08 22:35:38,795 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-01-08 22:35:38,795 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-08 22:35:38,801 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 65 statements into 2 equivalence classes. [2025-01-08 22:35:38,818 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 65 of 65 statements. [2025-01-08 22:35:38,818 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-01-08 22:35:38,818 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-08 22:35:39,150 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 36 proven. 55 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2025-01-08 22:35:39,151 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-08 22:35:39,151 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2039364378] [2025-01-08 22:35:39,151 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2039364378] provided 0 perfect and 1 imperfect interpolant sequences [2025-01-08 22:35:39,151 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [221824198] [2025-01-08 22:35:39,151 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-01-08 22:35:39,151 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-08 22:35:39,151 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-08 22:35:39,153 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-01-08 22:35:39,154 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2025-01-08 22:35:39,192 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 65 statements into 2 equivalence classes. [2025-01-08 22:35:39,211 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 65 of 65 statements. [2025-01-08 22:35:39,211 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-01-08 22:35:39,211 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-08 22:35:39,212 INFO L256 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 47 conjuncts are in the unsatisfiable core [2025-01-08 22:35:39,214 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-08 22:35:39,467 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 [2025-01-08 22:35:39,679 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 [2025-01-08 22:35:39,699 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 18 proven. 73 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2025-01-08 22:35:39,699 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-01-08 22:35:39,880 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 [2025-01-08 22:35:39,882 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 20 treesize of output 16 [2025-01-08 22:35:40,120 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 18 proven. 73 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2025-01-08 22:35:40,120 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [221824198] provided 0 perfect and 2 imperfect interpolant sequences [2025-01-08 22:35:40,120 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-01-08 22:35:40,120 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 20, 19] total 48 [2025-01-08 22:35:40,121 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1744832389] [2025-01-08 22:35:40,121 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-01-08 22:35:40,121 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2025-01-08 22:35:40,121 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-08 22:35:40,121 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2025-01-08 22:35:40,122 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=209, Invalid=2047, Unknown=0, NotChecked=0, Total=2256 [2025-01-08 22:35:40,122 INFO L87 Difference]: Start difference. First operand 58 states and 61 transitions. Second operand has 48 states, 47 states have (on average 1.9148936170212767) internal successors, (90), 43 states have internal predecessors, (90), 17 states have call successors, (18), 1 states have call predecessors, (18), 2 states have return successors, (18), 18 states have call predecessors, (18), 17 states have call successors, (18) [2025-01-08 22:35:40,880 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-01-08 22:35:40,880 INFO L93 Difference]: Finished difference Result 92 states and 100 transitions. [2025-01-08 22:35:40,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2025-01-08 22:35:40,881 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 47 states have (on average 1.9148936170212767) internal successors, (90), 43 states have internal predecessors, (90), 17 states have call successors, (18), 1 states have call predecessors, (18), 2 states have return successors, (18), 18 states have call predecessors, (18), 17 states have call successors, (18) Word has length 65 [2025-01-08 22:35:40,881 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-01-08 22:35:40,881 INFO L225 Difference]: With dead ends: 92 [2025-01-08 22:35:40,881 INFO L226 Difference]: Without dead ends: 69 [2025-01-08 22:35:40,882 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 101 SyntacticMatches, 1 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 997 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=452, Invalid=3330, Unknown=0, NotChecked=0, Total=3782 [2025-01-08 22:35:40,882 INFO L435 NwaCegarLoop]: 19 mSDtfsCounter, 125 mSDsluCounter, 348 mSDsCounter, 0 mSdLazyCounter, 873 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 126 SdHoareTripleChecker+Valid, 367 SdHoareTripleChecker+Invalid, 902 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 873 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2025-01-08 22:35:40,883 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [126 Valid, 367 Invalid, 902 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 873 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2025-01-08 22:35:40,883 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2025-01-08 22:35:40,888 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 61. [2025-01-08 22:35:40,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 47 states have (on average 1.0425531914893618) internal successors, (49), 47 states have internal predecessors, (49), 8 states have call successors, (8), 5 states have call predecessors, (8), 5 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2025-01-08 22:35:40,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 65 transitions. [2025-01-08 22:35:40,889 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 65 transitions. Word has length 65 [2025-01-08 22:35:40,889 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-01-08 22:35:40,889 INFO L471 AbstractCegarLoop]: Abstraction has 61 states and 65 transitions. [2025-01-08 22:35:40,889 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 47 states have (on average 1.9148936170212767) internal successors, (90), 43 states have internal predecessors, (90), 17 states have call successors, (18), 1 states have call predecessors, (18), 2 states have return successors, (18), 18 states have call predecessors, (18), 17 states have call successors, (18) [2025-01-08 22:35:40,889 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 65 transitions. [2025-01-08 22:35:40,890 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2025-01-08 22:35:40,890 INFO L210 NwaCegarLoop]: Found error trace [2025-01-08 22:35:40,890 INFO L218 NwaCegarLoop]: trace histogram [8, 8, 8, 6, 6, 6, 6, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-01-08 22:35:40,896 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2025-01-08 22:35:41,094 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,SelfDestructingSolverStorable14 [2025-01-08 22:35:41,094 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-01-08 22:35:41,094 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-08 22:35:41,094 INFO L85 PathProgramCache]: Analyzing trace with hash -1733505299, now seen corresponding path program 11 times [2025-01-08 22:35:41,094 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-08 22:35:41,094 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1640344003] [2025-01-08 22:35:41,095 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-01-08 22:35:41,095 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-08 22:35:41,100 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 72 statements into 8 equivalence classes. [2025-01-08 22:35:41,108 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) and asserted 72 of 72 statements. [2025-01-08 22:35:41,109 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2025-01-08 22:35:41,109 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-08 22:35:41,422 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 18 proven. 95 refuted. 0 times theorem prover too weak. 76 trivial. 0 not checked. [2025-01-08 22:35:41,422 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-08 22:35:41,423 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1640344003] [2025-01-08 22:35:41,423 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1640344003] provided 0 perfect and 1 imperfect interpolant sequences [2025-01-08 22:35:41,423 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1316982440] [2025-01-08 22:35:41,423 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-01-08 22:35:41,423 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-08 22:35:41,423 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-08 22:35:41,426 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-01-08 22:35:41,427 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2025-01-08 22:35:41,466 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 72 statements into 8 equivalence classes. [2025-01-08 22:35:41,491 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) and asserted 72 of 72 statements. [2025-01-08 22:35:41,491 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2025-01-08 22:35:41,491 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-08 22:35:41,492 INFO L256 TraceCheckSpWp]: Trace formula consists of 218 conjuncts, 53 conjuncts are in the unsatisfiable core [2025-01-08 22:35:41,493 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-08 22:35:41,742 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 [2025-01-08 22:35:41,823 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 [2025-01-08 22:35:42,035 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 [2025-01-08 22:35:42,056 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 40 proven. 95 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2025-01-08 22:35:42,056 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-01-08 22:35:42,207 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 21 treesize of output 19 [2025-01-08 22:35:42,209 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 21 [2025-01-08 22:35:42,308 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 18 proven. 95 refuted. 0 times theorem prover too weak. 76 trivial. 0 not checked. [2025-01-08 22:35:42,309 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1316982440] provided 0 perfect and 2 imperfect interpolant sequences [2025-01-08 22:35:42,309 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-01-08 22:35:42,309 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 22, 20] total 39 [2025-01-08 22:35:42,309 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1681981583] [2025-01-08 22:35:42,309 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-01-08 22:35:42,309 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2025-01-08 22:35:42,309 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-08 22:35:42,310 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2025-01-08 22:35:42,310 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=159, Invalid=1323, Unknown=0, NotChecked=0, Total=1482 [2025-01-08 22:35:42,310 INFO L87 Difference]: Start difference. First operand 61 states and 65 transitions. Second operand has 39 states, 38 states have (on average 1.9473684210526316) internal successors, (74), 35 states have internal predecessors, (74), 14 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (15), 15 states have call predecessors, (15), 14 states have call successors, (15) [2025-01-08 22:35:46,857 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] [2025-01-08 22:35:46,903 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-01-08 22:35:46,903 INFO L93 Difference]: Finished difference Result 111 states and 119 transitions. [2025-01-08 22:35:46,903 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2025-01-08 22:35:46,903 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 38 states have (on average 1.9473684210526316) internal successors, (74), 35 states have internal predecessors, (74), 14 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (15), 15 states have call predecessors, (15), 14 states have call successors, (15) Word has length 72 [2025-01-08 22:35:46,903 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-01-08 22:35:46,904 INFO L225 Difference]: With dead ends: 111 [2025-01-08 22:35:46,904 INFO L226 Difference]: Without dead ends: 109 [2025-01-08 22:35:46,905 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 175 GetRequests, 116 SyntacticMatches, 10 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 735 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=306, Invalid=2244, Unknown=0, NotChecked=0, Total=2550 [2025-01-08 22:35:46,905 INFO L435 NwaCegarLoop]: 24 mSDtfsCounter, 179 mSDsluCounter, 408 mSDsCounter, 0 mSdLazyCounter, 810 mSolverCounterSat, 42 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 180 SdHoareTripleChecker+Valid, 432 SdHoareTripleChecker+Invalid, 853 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 810 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.4s IncrementalHoareTripleChecker+Time [2025-01-08 22:35:46,905 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [180 Valid, 432 Invalid, 853 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 810 Invalid, 1 Unknown, 0 Unchecked, 4.4s Time] [2025-01-08 22:35:46,906 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2025-01-08 22:35:46,913 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 75. [2025-01-08 22:35:46,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 57 states have (on average 1.0701754385964912) internal successors, (61), 58 states have internal predecessors, (61), 11 states have call successors, (11), 6 states have call predecessors, (11), 6 states have return successors, (11), 10 states have call predecessors, (11), 11 states have call successors, (11) [2025-01-08 22:35:46,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 83 transitions. [2025-01-08 22:35:46,914 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 83 transitions. Word has length 72 [2025-01-08 22:35:46,914 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-01-08 22:35:46,914 INFO L471 AbstractCegarLoop]: Abstraction has 75 states and 83 transitions. [2025-01-08 22:35:46,915 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 38 states have (on average 1.9473684210526316) internal successors, (74), 35 states have internal predecessors, (74), 14 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (15), 15 states have call predecessors, (15), 14 states have call successors, (15) [2025-01-08 22:35:46,915 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 83 transitions. [2025-01-08 22:35:46,915 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2025-01-08 22:35:46,915 INFO L210 NwaCegarLoop]: Found error trace [2025-01-08 22:35:46,915 INFO L218 NwaCegarLoop]: trace histogram [8, 8, 8, 6, 6, 6, 6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-01-08 22:35:46,922 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2025-01-08 22:35:47,115 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,SelfDestructingSolverStorable15 [2025-01-08 22:35:47,116 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-01-08 22:35:47,116 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-08 22:35:47,116 INFO L85 PathProgramCache]: Analyzing trace with hash -164810873, now seen corresponding path program 12 times [2025-01-08 22:35:47,116 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-08 22:35:47,116 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1245243700] [2025-01-08 22:35:47,116 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-01-08 22:35:47,116 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-08 22:35:47,122 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 75 statements into 8 equivalence classes. [2025-01-08 22:35:47,139 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) and asserted 75 of 75 statements. [2025-01-08 22:35:47,140 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2025-01-08 22:35:47,140 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-08 22:35:47,489 INFO L134 CoverageAnalysis]: Checked inductivity of 203 backedges. 39 proven. 88 refuted. 0 times theorem prover too weak. 76 trivial. 0 not checked. [2025-01-08 22:35:47,490 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-08 22:35:47,490 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1245243700] [2025-01-08 22:35:47,490 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1245243700] provided 0 perfect and 1 imperfect interpolant sequences [2025-01-08 22:35:47,490 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2147398858] [2025-01-08 22:35:47,490 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-01-08 22:35:47,490 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-08 22:35:47,490 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-08 22:35:47,492 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-01-08 22:35:47,497 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2025-01-08 22:35:47,552 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 75 statements into 8 equivalence classes. [2025-01-08 22:35:47,606 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) and asserted 75 of 75 statements. [2025-01-08 22:35:47,606 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2025-01-08 22:35:47,606 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-08 22:35:47,607 INFO L256 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 40 conjuncts are in the unsatisfiable core [2025-01-08 22:35:47,609 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-08 22:35:47,886 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 23 treesize of output 1 [2025-01-08 22:35:48,194 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2025-01-08 22:35:48,194 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 12 [2025-01-08 22:35:48,219 INFO L134 CoverageAnalysis]: Checked inductivity of 203 backedges. 50 proven. 86 refuted. 0 times theorem prover too weak. 67 trivial. 0 not checked. [2025-01-08 22:35:48,219 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-01-08 22:35:48,689 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 20 treesize of output 18 [2025-01-08 22:35:48,691 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 26 treesize of output 20 [2025-01-08 22:35:49,256 INFO L134 CoverageAnalysis]: Checked inductivity of 203 backedges. 51 proven. 76 refuted. 0 times theorem prover too weak. 76 trivial. 0 not checked. [2025-01-08 22:35:49,256 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2147398858] provided 0 perfect and 2 imperfect interpolant sequences [2025-01-08 22:35:49,256 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-01-08 22:35:49,256 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 21, 20] total 53 [2025-01-08 22:35:49,256 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [814885601] [2025-01-08 22:35:49,256 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-01-08 22:35:49,257 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2025-01-08 22:35:49,257 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-08 22:35:49,257 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2025-01-08 22:35:49,258 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=421, Invalid=2335, Unknown=0, NotChecked=0, Total=2756 [2025-01-08 22:35:49,258 INFO L87 Difference]: Start difference. First operand 75 states and 83 transitions. Second operand has 53 states, 53 states have (on average 1.9811320754716981) internal successors, (105), 47 states have internal predecessors, (105), 20 states have call successors, (21), 1 states have call predecessors, (21), 2 states have return successors, (23), 23 states have call predecessors, (23), 20 states have call successors, (23) [2025-01-08 22:35:50,910 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-01-08 22:35:50,910 INFO L93 Difference]: Finished difference Result 118 states and 126 transitions. [2025-01-08 22:35:50,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2025-01-08 22:35:50,911 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 53 states have (on average 1.9811320754716981) internal successors, (105), 47 states have internal predecessors, (105), 20 states have call successors, (21), 1 states have call predecessors, (21), 2 states have return successors, (23), 23 states have call predecessors, (23), 20 states have call successors, (23) Word has length 75 [2025-01-08 22:35:50,911 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-01-08 22:35:50,911 INFO L225 Difference]: With dead ends: 118 [2025-01-08 22:35:50,912 INFO L226 Difference]: Without dead ends: 97 [2025-01-08 22:35:50,913 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 198 GetRequests, 119 SyntacticMatches, 0 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1974 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=1222, Invalid=5258, Unknown=0, NotChecked=0, Total=6480 [2025-01-08 22:35:50,913 INFO L435 NwaCegarLoop]: 18 mSDtfsCounter, 215 mSDsluCounter, 223 mSDsCounter, 0 mSdLazyCounter, 427 mSolverCounterSat, 76 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 215 SdHoareTripleChecker+Valid, 241 SdHoareTripleChecker+Invalid, 504 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 76 IncrementalHoareTripleChecker+Valid, 427 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2025-01-08 22:35:50,913 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [215 Valid, 241 Invalid, 504 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [76 Valid, 427 Invalid, 1 Unknown, 0 Unchecked, 0.8s Time] [2025-01-08 22:35:50,913 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2025-01-08 22:35:50,921 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 75. [2025-01-08 22:35:50,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 57 states have (on average 1.0526315789473684) internal successors, (60), 58 states have internal predecessors, (60), 11 states have call successors, (11), 6 states have call predecessors, (11), 6 states have return successors, (11), 10 states have call predecessors, (11), 11 states have call successors, (11) [2025-01-08 22:35:50,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 82 transitions. [2025-01-08 22:35:50,922 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 82 transitions. Word has length 75 [2025-01-08 22:35:50,922 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-01-08 22:35:50,923 INFO L471 AbstractCegarLoop]: Abstraction has 75 states and 82 transitions. [2025-01-08 22:35:50,923 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 53 states have (on average 1.9811320754716981) internal successors, (105), 47 states have internal predecessors, (105), 20 states have call successors, (21), 1 states have call predecessors, (21), 2 states have return successors, (23), 23 states have call predecessors, (23), 20 states have call successors, (23) [2025-01-08 22:35:50,923 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 82 transitions. [2025-01-08 22:35:50,923 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2025-01-08 22:35:50,923 INFO L210 NwaCegarLoop]: Found error trace [2025-01-08 22:35:50,923 INFO L218 NwaCegarLoop]: trace histogram [9, 9, 9, 7, 7, 7, 7, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-01-08 22:35:50,929 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2025-01-08 22:35:51,124 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,SelfDestructingSolverStorable16 [2025-01-08 22:35:51,124 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-01-08 22:35:51,124 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-08 22:35:51,124 INFO L85 PathProgramCache]: Analyzing trace with hash -2011223624, now seen corresponding path program 13 times [2025-01-08 22:35:51,124 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-08 22:35:51,124 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [35992995] [2025-01-08 22:35:51,125 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-01-08 22:35:51,125 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-08 22:35:51,130 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 82 statements into 1 equivalence classes. [2025-01-08 22:35:51,146 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 82 of 82 statements. [2025-01-08 22:35:51,147 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-08 22:35:51,147 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-08 22:35:51,528 INFO L134 CoverageAnalysis]: Checked inductivity of 254 backedges. 21 proven. 131 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2025-01-08 22:35:51,528 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-08 22:35:51,528 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [35992995] [2025-01-08 22:35:51,528 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [35992995] provided 0 perfect and 1 imperfect interpolant sequences [2025-01-08 22:35:51,528 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [570964974] [2025-01-08 22:35:51,528 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-01-08 22:35:51,528 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-08 22:35:51,528 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-08 22:35:51,535 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-01-08 22:35:51,537 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2025-01-08 22:35:51,588 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 82 statements into 1 equivalence classes. [2025-01-08 22:35:51,608 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 82 of 82 statements. [2025-01-08 22:35:51,608 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-08 22:35:51,608 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-08 22:35:51,610 INFO L256 TraceCheckSpWp]: Trace formula consists of 246 conjuncts, 54 conjuncts are in the unsatisfiable core [2025-01-08 22:35:51,612 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-08 22:35:51,899 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 [2025-01-08 22:35:51,991 INFO L190 IndexEqualityManager]: detected not equals via solver [2025-01-08 22:35:51,992 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 27 treesize of output 11 [2025-01-08 22:35:52,253 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 [2025-01-08 22:35:52,274 INFO L134 CoverageAnalysis]: Checked inductivity of 254 backedges. 47 proven. 131 refuted. 0 times theorem prover too weak. 76 trivial. 0 not checked. [2025-01-08 22:35:52,275 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-01-08 22:35:52,463 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 21 treesize of output 19 [2025-01-08 22:35:52,465 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 21 [2025-01-08 22:35:52,578 INFO L134 CoverageAnalysis]: Checked inductivity of 254 backedges. 21 proven. 131 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2025-01-08 22:35:52,578 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [570964974] provided 0 perfect and 2 imperfect interpolant sequences [2025-01-08 22:35:52,578 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-01-08 22:35:52,578 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 24, 22] total 44 [2025-01-08 22:35:52,578 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2115316993] [2025-01-08 22:35:52,578 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-01-08 22:35:52,579 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2025-01-08 22:35:52,579 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-08 22:35:52,579 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2025-01-08 22:35:52,580 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=184, Invalid=1708, Unknown=0, NotChecked=0, Total=1892 [2025-01-08 22:35:52,580 INFO L87 Difference]: Start difference. First operand 75 states and 82 transitions. Second operand has 44 states, 43 states have (on average 2.046511627906977) internal successors, (88), 40 states have internal predecessors, (88), 16 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (17), 17 states have call predecessors, (17), 16 states have call successors, (17) [2025-01-08 22:35:53,200 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-01-08 22:35:53,200 INFO L93 Difference]: Finished difference Result 105 states and 110 transitions. [2025-01-08 22:35:53,200 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2025-01-08 22:35:53,200 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 43 states have (on average 2.046511627906977) internal successors, (88), 40 states have internal predecessors, (88), 16 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (17), 17 states have call predecessors, (17), 16 states have call successors, (17) Word has length 82 [2025-01-08 22:35:53,201 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-01-08 22:35:53,201 INFO L225 Difference]: With dead ends: 105 [2025-01-08 22:35:53,201 INFO L226 Difference]: Without dead ends: 103 [2025-01-08 22:35:53,202 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 196 GetRequests, 133 SyntacticMatches, 10 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 901 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=314, Invalid=2656, Unknown=0, NotChecked=0, Total=2970 [2025-01-08 22:35:53,202 INFO L435 NwaCegarLoop]: 26 mSDtfsCounter, 95 mSDsluCounter, 452 mSDsCounter, 0 mSdLazyCounter, 1068 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 95 SdHoareTripleChecker+Valid, 478 SdHoareTripleChecker+Invalid, 1085 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 1068 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2025-01-08 22:35:53,202 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [95 Valid, 478 Invalid, 1085 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 1068 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2025-01-08 22:35:53,203 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2025-01-08 22:35:53,214 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 100. [2025-01-08 22:35:53,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 80 states have (on average 1.05) internal successors, (84), 81 states have internal predecessors, (84), 11 states have call successors, (11), 8 states have call predecessors, (11), 8 states have return successors, (11), 10 states have call predecessors, (11), 11 states have call successors, (11) [2025-01-08 22:35:53,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 106 transitions. [2025-01-08 22:35:53,215 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 106 transitions. Word has length 82 [2025-01-08 22:35:53,215 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-01-08 22:35:53,215 INFO L471 AbstractCegarLoop]: Abstraction has 100 states and 106 transitions. [2025-01-08 22:35:53,215 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 43 states have (on average 2.046511627906977) internal successors, (88), 40 states have internal predecessors, (88), 16 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (17), 17 states have call predecessors, (17), 16 states have call successors, (17) [2025-01-08 22:35:53,215 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 106 transitions. [2025-01-08 22:35:53,216 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2025-01-08 22:35:53,216 INFO L210 NwaCegarLoop]: Found error trace [2025-01-08 22:35:53,216 INFO L218 NwaCegarLoop]: trace histogram [10, 10, 10, 8, 8, 8, 8, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-01-08 22:35:53,222 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 [2025-01-08 22:35:53,420 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2025-01-08 22:35:53,420 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-01-08 22:35:53,421 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-08 22:35:53,421 INFO L85 PathProgramCache]: Analyzing trace with hash 414901261, now seen corresponding path program 14 times [2025-01-08 22:35:53,421 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-08 22:35:53,421 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1084596545] [2025-01-08 22:35:53,421 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-01-08 22:35:53,421 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-08 22:35:53,426 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 86 statements into 2 equivalence classes. [2025-01-08 22:35:53,434 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 86 of 86 statements. [2025-01-08 22:35:53,434 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-01-08 22:35:53,434 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-08 22:35:53,849 INFO L134 CoverageAnalysis]: Checked inductivity of 298 backedges. 21 proven. 145 refuted. 0 times theorem prover too weak. 132 trivial. 0 not checked. [2025-01-08 22:35:53,849 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-08 22:35:53,849 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1084596545] [2025-01-08 22:35:53,849 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1084596545] provided 0 perfect and 1 imperfect interpolant sequences [2025-01-08 22:35:53,849 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [584635078] [2025-01-08 22:35:53,849 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-01-08 22:35:53,849 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-08 22:35:53,849 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-08 22:35:53,852 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-01-08 22:35:53,855 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2025-01-08 22:35:53,904 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 86 statements into 2 equivalence classes. [2025-01-08 22:35:53,927 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 86 of 86 statements. [2025-01-08 22:35:53,927 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-01-08 22:35:53,927 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-08 22:35:53,929 INFO L256 TraceCheckSpWp]: Trace formula consists of 254 conjuncts, 48 conjuncts are in the unsatisfiable core [2025-01-08 22:35:53,933 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-08 22:35:54,194 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 [2025-01-08 22:35:54,285 INFO L190 IndexEqualityManager]: detected not equals via solver [2025-01-08 22:35:54,285 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 27 treesize of output 11 [2025-01-08 22:35:54,377 INFO L190 IndexEqualityManager]: detected not equals via solver [2025-01-08 22:35:54,378 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 27 treesize of output 11 [2025-01-08 22:35:54,470 INFO L190 IndexEqualityManager]: detected not equals via solver [2025-01-08 22:35:54,471 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 27 treesize of output 11 [2025-01-08 22:35:54,668 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 [2025-01-08 22:35:54,694 INFO L134 CoverageAnalysis]: Checked inductivity of 298 backedges. 93 proven. 139 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2025-01-08 22:35:54,694 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-01-08 22:35:54,914 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 20 treesize of output 18 [2025-01-08 22:35:54,918 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 24 treesize of output 20 [2025-01-08 22:35:55,012 INFO L134 CoverageAnalysis]: Checked inductivity of 298 backedges. 18 proven. 145 refuted. 0 times theorem prover too weak. 135 trivial. 0 not checked. [2025-01-08 22:35:55,013 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [584635078] provided 0 perfect and 2 imperfect interpolant sequences [2025-01-08 22:35:55,013 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-01-08 22:35:55,013 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 23, 20] total 42 [2025-01-08 22:35:55,013 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1927917255] [2025-01-08 22:35:55,013 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-01-08 22:35:55,013 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2025-01-08 22:35:55,013 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-08 22:35:55,014 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2025-01-08 22:35:55,014 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=182, Invalid=1540, Unknown=0, NotChecked=0, Total=1722 [2025-01-08 22:35:55,014 INFO L87 Difference]: Start difference. First operand 100 states and 106 transitions. Second operand has 42 states, 41 states have (on average 2.1219512195121952) internal successors, (87), 38 states have internal predecessors, (87), 18 states have call successors, (19), 2 states have call predecessors, (19), 3 states have return successors, (19), 19 states have call predecessors, (19), 18 states have call successors, (19) [2025-01-08 22:35:55,534 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-01-08 22:35:55,535 INFO L93 Difference]: Finished difference Result 108 states and 113 transitions. [2025-01-08 22:35:55,535 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2025-01-08 22:35:55,535 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 41 states have (on average 2.1219512195121952) internal successors, (87), 38 states have internal predecessors, (87), 18 states have call successors, (19), 2 states have call predecessors, (19), 3 states have return successors, (19), 19 states have call predecessors, (19), 18 states have call successors, (19) Word has length 86 [2025-01-08 22:35:55,535 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-01-08 22:35:55,536 INFO L225 Difference]: With dead ends: 108 [2025-01-08 22:35:55,536 INFO L226 Difference]: Without dead ends: 106 [2025-01-08 22:35:55,537 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 204 GetRequests, 138 SyntacticMatches, 15 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 977 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=313, Invalid=2443, Unknown=0, NotChecked=0, Total=2756 [2025-01-08 22:35:55,537 INFO L435 NwaCegarLoop]: 29 mSDtfsCounter, 70 mSDsluCounter, 416 mSDsCounter, 0 mSdLazyCounter, 910 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 70 SdHoareTripleChecker+Valid, 445 SdHoareTripleChecker+Invalid, 925 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 910 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2025-01-08 22:35:55,537 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [70 Valid, 445 Invalid, 925 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 910 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2025-01-08 22:35:55,538 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2025-01-08 22:35:55,549 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 78. [2025-01-08 22:35:55,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 61 states have (on average 1.0327868852459017) internal successors, (63), 61 states have internal predecessors, (63), 9 states have call successors, (9), 7 states have call predecessors, (9), 7 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2025-01-08 22:35:55,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 81 transitions. [2025-01-08 22:35:55,550 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 81 transitions. Word has length 86 [2025-01-08 22:35:55,550 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-01-08 22:35:55,550 INFO L471 AbstractCegarLoop]: Abstraction has 78 states and 81 transitions. [2025-01-08 22:35:55,551 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 41 states have (on average 2.1219512195121952) internal successors, (87), 38 states have internal predecessors, (87), 18 states have call successors, (19), 2 states have call predecessors, (19), 3 states have return successors, (19), 19 states have call predecessors, (19), 18 states have call successors, (19) [2025-01-08 22:35:55,551 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 81 transitions. [2025-01-08 22:35:55,556 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2025-01-08 22:35:55,556 INFO L210 NwaCegarLoop]: Found error trace [2025-01-08 22:35:55,556 INFO L218 NwaCegarLoop]: trace histogram [9, 9, 9, 7, 7, 7, 7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-01-08 22:35:55,562 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2025-01-08 22:35:55,756 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,19 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-08 22:35:55,756 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-01-08 22:35:55,756 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-08 22:35:55,757 INFO L85 PathProgramCache]: Analyzing trace with hash -1564418852, now seen corresponding path program 15 times [2025-01-08 22:35:55,757 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-08 22:35:55,757 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1286563833] [2025-01-08 22:35:55,757 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-01-08 22:35:55,757 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-08 22:35:55,766 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 85 statements into 9 equivalence classes. [2025-01-08 22:35:55,794 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) and asserted 85 of 85 statements. [2025-01-08 22:35:55,794 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2025-01-08 22:35:55,794 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-08 22:35:56,228 INFO L134 CoverageAnalysis]: Checked inductivity of 271 backedges. 54 proven. 115 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2025-01-08 22:35:56,228 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-08 22:35:56,229 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1286563833] [2025-01-08 22:35:56,229 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1286563833] provided 0 perfect and 1 imperfect interpolant sequences [2025-01-08 22:35:56,229 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1436644953] [2025-01-08 22:35:56,229 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-01-08 22:35:56,229 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-08 22:35:56,229 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-08 22:35:56,231 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-01-08 22:35:56,232 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2025-01-08 22:35:56,284 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 85 statements into 9 equivalence classes. [2025-01-08 22:35:56,458 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) and asserted 85 of 85 statements. [2025-01-08 22:35:56,458 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2025-01-08 22:35:56,458 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-08 22:35:56,462 INFO L256 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 48 conjuncts are in the unsatisfiable core [2025-01-08 22:35:56,464 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-08 22:35:56,708 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 19 treesize of output 1 [2025-01-08 22:35:56,984 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 19 treesize of output 7 [2025-01-08 22:35:57,004 INFO L134 CoverageAnalysis]: Checked inductivity of 271 backedges. 24 proven. 145 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2025-01-08 22:35:57,005 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-01-08 22:35:57,276 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 [2025-01-08 22:35:57,278 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 20 treesize of output 16 [2025-01-08 22:35:57,646 INFO L134 CoverageAnalysis]: Checked inductivity of 271 backedges. 24 proven. 145 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2025-01-08 22:35:57,646 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1436644953] provided 0 perfect and 2 imperfect interpolant sequences [2025-01-08 22:35:57,646 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-01-08 22:35:57,646 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22, 22] total 57 [2025-01-08 22:35:57,646 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1825675894] [2025-01-08 22:35:57,646 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-01-08 22:35:57,647 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 57 states [2025-01-08 22:35:57,647 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-08 22:35:57,647 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2025-01-08 22:35:57,648 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=478, Invalid=2714, Unknown=0, NotChecked=0, Total=3192 [2025-01-08 22:35:57,648 INFO L87 Difference]: Start difference. First operand 78 states and 81 transitions. Second operand has 57 states, 57 states have (on average 2.087719298245614) internal successors, (119), 52 states have internal predecessors, (119), 22 states have call successors, (23), 1 states have call predecessors, (23), 2 states have return successors, (24), 24 states have call predecessors, (24), 22 states have call successors, (24) [2025-01-08 22:35:58,566 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-01-08 22:35:58,566 INFO L93 Difference]: Finished difference Result 121 states and 130 transitions. [2025-01-08 22:35:58,566 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2025-01-08 22:35:58,567 INFO L78 Accepts]: Start accepts. Automaton has has 57 states, 57 states have (on average 2.087719298245614) internal successors, (119), 52 states have internal predecessors, (119), 22 states have call successors, (23), 1 states have call predecessors, (23), 2 states have return successors, (24), 24 states have call predecessors, (24), 22 states have call successors, (24) Word has length 85 [2025-01-08 22:35:58,567 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-01-08 22:35:58,568 INFO L225 Difference]: With dead ends: 121 [2025-01-08 22:35:58,568 INFO L226 Difference]: Without dead ends: 89 [2025-01-08 22:35:58,569 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 213 GetRequests, 135 SyntacticMatches, 2 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1968 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=942, Invalid=5064, Unknown=0, NotChecked=0, Total=6006 [2025-01-08 22:35:58,570 INFO L435 NwaCegarLoop]: 24 mSDtfsCounter, 187 mSDsluCounter, 396 mSDsCounter, 0 mSdLazyCounter, 1039 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 188 SdHoareTripleChecker+Valid, 420 SdHoareTripleChecker+Invalid, 1081 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 1039 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2025-01-08 22:35:58,570 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [188 Valid, 420 Invalid, 1081 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 1039 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2025-01-08 22:35:58,570 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2025-01-08 22:35:58,579 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 81. [2025-01-08 22:35:58,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 63 states have (on average 1.0317460317460319) internal successors, (65), 63 states have internal predecessors, (65), 10 states have call successors, (10), 7 states have call predecessors, (10), 7 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2025-01-08 22:35:58,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 85 transitions. [2025-01-08 22:35:58,580 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 85 transitions. Word has length 85 [2025-01-08 22:35:58,580 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-01-08 22:35:58,580 INFO L471 AbstractCegarLoop]: Abstraction has 81 states and 85 transitions. [2025-01-08 22:35:58,580 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 57 states, 57 states have (on average 2.087719298245614) internal successors, (119), 52 states have internal predecessors, (119), 22 states have call successors, (23), 1 states have call predecessors, (23), 2 states have return successors, (24), 24 states have call predecessors, (24), 22 states have call successors, (24) [2025-01-08 22:35:58,580 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 85 transitions. [2025-01-08 22:35:58,581 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2025-01-08 22:35:58,581 INFO L210 NwaCegarLoop]: Found error trace [2025-01-08 22:35:58,581 INFO L218 NwaCegarLoop]: trace histogram [10, 10, 10, 8, 8, 8, 8, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-01-08 22:35:58,588 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2025-01-08 22:35:58,781 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,20 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-08 22:35:58,782 INFO L396 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-01-08 22:35:58,782 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-08 22:35:58,782 INFO L85 PathProgramCache]: Analyzing trace with hash 298356173, now seen corresponding path program 16 times [2025-01-08 22:35:58,782 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-08 22:35:58,782 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1794240377] [2025-01-08 22:35:58,782 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-01-08 22:35:58,782 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-08 22:35:58,789 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 92 statements into 2 equivalence classes. [2025-01-08 22:35:58,804 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 92 of 92 statements. [2025-01-08 22:35:58,805 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-01-08 22:35:58,805 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-08 22:35:59,248 INFO L134 CoverageAnalysis]: Checked inductivity of 329 backedges. 24 proven. 173 refuted. 0 times theorem prover too weak. 132 trivial. 0 not checked. [2025-01-08 22:35:59,250 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-08 22:35:59,250 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1794240377] [2025-01-08 22:35:59,250 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1794240377] provided 0 perfect and 1 imperfect interpolant sequences [2025-01-08 22:35:59,250 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1765417603] [2025-01-08 22:35:59,250 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-01-08 22:35:59,250 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-08 22:35:59,250 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-08 22:35:59,252 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) [2025-01-08 22:35:59,257 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 [2025-01-08 22:35:59,309 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 92 statements into 2 equivalence classes. [2025-01-08 22:35:59,338 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 92 of 92 statements. [2025-01-08 22:35:59,339 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-01-08 22:35:59,339 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-08 22:35:59,340 INFO L256 TraceCheckSpWp]: Trace formula consists of 274 conjuncts, 59 conjuncts are in the unsatisfiable core [2025-01-08 22:35:59,342 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-08 22:35:59,708 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 [2025-01-08 22:35:59,786 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 [2025-01-08 22:36:00,055 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 [2025-01-08 22:36:00,077 INFO L134 CoverageAnalysis]: Checked inductivity of 329 backedges. 54 proven. 173 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2025-01-08 22:36:00,077 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-01-08 22:36:00,255 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1765417603] provided 0 perfect and 1 imperfect interpolant sequences [2025-01-08 22:36:00,256 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2025-01-08 22:36:00,256 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 26] total 45 [2025-01-08 22:36:00,256 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [3110734] [2025-01-08 22:36:00,256 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2025-01-08 22:36:00,256 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2025-01-08 22:36:00,256 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-08 22:36:00,257 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2025-01-08 22:36:00,257 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=200, Invalid=1962, Unknown=0, NotChecked=0, Total=2162 [2025-01-08 22:36:00,258 INFO L87 Difference]: Start difference. First operand 81 states and 85 transitions. Second operand has 45 states, 44 states have (on average 2.0454545454545454) internal successors, (90), 41 states have internal predecessors, (90), 18 states have call successors, (19), 2 states have call predecessors, (19), 3 states have return successors, (19), 19 states have call predecessors, (19), 18 states have call successors, (19) [2025-01-08 22:36:01,007 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-01-08 22:36:01,007 INFO L93 Difference]: Finished difference Result 137 states and 145 transitions. [2025-01-08 22:36:01,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2025-01-08 22:36:01,007 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 44 states have (on average 2.0454545454545454) internal successors, (90), 41 states have internal predecessors, (90), 18 states have call successors, (19), 2 states have call predecessors, (19), 3 states have return successors, (19), 19 states have call predecessors, (19), 18 states have call successors, (19) Word has length 92 [2025-01-08 22:36:01,008 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-01-08 22:36:01,008 INFO L225 Difference]: With dead ends: 137 [2025-01-08 22:36:01,008 INFO L226 Difference]: Without dead ends: 135 [2025-01-08 22:36:01,009 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 85 SyntacticMatches, 10 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1126 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=385, Invalid=3275, Unknown=0, NotChecked=0, Total=3660 [2025-01-08 22:36:01,009 INFO L435 NwaCegarLoop]: 28 mSDtfsCounter, 202 mSDsluCounter, 442 mSDsCounter, 0 mSdLazyCounter, 1199 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 203 SdHoareTripleChecker+Valid, 470 SdHoareTripleChecker+Invalid, 1246 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 1199 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2025-01-08 22:36:01,009 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [203 Valid, 470 Invalid, 1246 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 1199 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2025-01-08 22:36:01,010 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2025-01-08 22:36:01,030 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 95. [2025-01-08 22:36:01,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 73 states have (on average 1.0547945205479452) internal successors, (77), 74 states have internal predecessors, (77), 13 states have call successors, (13), 8 states have call predecessors, (13), 8 states have return successors, (13), 12 states have call predecessors, (13), 13 states have call successors, (13) [2025-01-08 22:36:01,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 103 transitions. [2025-01-08 22:36:01,031 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 103 transitions. Word has length 92 [2025-01-08 22:36:01,031 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-01-08 22:36:01,031 INFO L471 AbstractCegarLoop]: Abstraction has 95 states and 103 transitions. [2025-01-08 22:36:01,031 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 44 states have (on average 2.0454545454545454) internal successors, (90), 41 states have internal predecessors, (90), 18 states have call successors, (19), 2 states have call predecessors, (19), 3 states have return successors, (19), 19 states have call predecessors, (19), 18 states have call successors, (19) [2025-01-08 22:36:01,031 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 103 transitions. [2025-01-08 22:36:01,032 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2025-01-08 22:36:01,032 INFO L210 NwaCegarLoop]: Found error trace [2025-01-08 22:36:01,032 INFO L218 NwaCegarLoop]: trace histogram [10, 10, 10, 8, 8, 8, 8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-01-08 22:36:01,038 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2025-01-08 22:36:01,232 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,21 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-08 22:36:01,232 INFO L396 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-01-08 22:36:01,233 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-08 22:36:01,233 INFO L85 PathProgramCache]: Analyzing trace with hash 2046198951, now seen corresponding path program 17 times [2025-01-08 22:36:01,233 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-08 22:36:01,233 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [687268246] [2025-01-08 22:36:01,233 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-01-08 22:36:01,233 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-08 22:36:01,239 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 95 statements into 10 equivalence classes. [2025-01-08 22:36:01,253 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) and asserted 95 of 95 statements. [2025-01-08 22:36:01,253 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2025-01-08 22:36:01,253 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-08 22:36:01,682 INFO L134 CoverageAnalysis]: Checked inductivity of 349 backedges. 27 proven. 190 refuted. 0 times theorem prover too weak. 132 trivial. 0 not checked. [2025-01-08 22:36:01,682 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-08 22:36:01,682 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [687268246] [2025-01-08 22:36:01,683 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [687268246] provided 0 perfect and 1 imperfect interpolant sequences [2025-01-08 22:36:01,683 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1012270633] [2025-01-08 22:36:01,683 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-01-08 22:36:01,683 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-08 22:36:01,683 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-08 22:36:01,685 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-01-08 22:36:01,689 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2025-01-08 22:36:01,748 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 95 statements into 10 equivalence classes. [2025-01-08 22:36:01,783 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) and asserted 95 of 95 statements. [2025-01-08 22:36:01,783 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2025-01-08 22:36:01,783 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-08 22:36:01,785 INFO L256 TraceCheckSpWp]: Trace formula consists of 284 conjuncts, 61 conjuncts are in the unsatisfiable core [2025-01-08 22:36:01,786 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-08 22:36:02,203 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 [2025-01-08 22:36:02,584 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 [2025-01-08 22:36:02,608 INFO L134 CoverageAnalysis]: Checked inductivity of 349 backedges. 27 proven. 190 refuted. 0 times theorem prover too weak. 132 trivial. 0 not checked. [2025-01-08 22:36:02,608 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-01-08 22:36:02,788 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 [2025-01-08 22:36:02,790 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 20 treesize of output 16 [2025-01-08 22:36:02,908 INFO L134 CoverageAnalysis]: Checked inductivity of 349 backedges. 27 proven. 190 refuted. 0 times theorem prover too weak. 132 trivial. 0 not checked. [2025-01-08 22:36:02,908 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1012270633] provided 0 perfect and 2 imperfect interpolant sequences [2025-01-08 22:36:02,908 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-01-08 22:36:02,908 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 26, 25] total 48 [2025-01-08 22:36:02,908 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [889129972] [2025-01-08 22:36:02,908 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-01-08 22:36:02,908 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2025-01-08 22:36:02,908 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-08 22:36:02,909 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2025-01-08 22:36:02,909 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=186, Invalid=2070, Unknown=0, NotChecked=0, Total=2256 [2025-01-08 22:36:02,909 INFO L87 Difference]: Start difference. First operand 95 states and 103 transitions. Second operand has 48 states, 47 states have (on average 2.0638297872340425) internal successors, (97), 44 states have internal predecessors, (97), 18 states have call successors, (19), 1 states have call predecessors, (19), 2 states have return successors, (19), 19 states have call predecessors, (19), 18 states have call successors, (19) [2025-01-08 22:36:03,796 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-01-08 22:36:03,796 INFO L93 Difference]: Finished difference Result 159 states and 167 transitions. [2025-01-08 22:36:03,797 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2025-01-08 22:36:03,797 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 47 states have (on average 2.0638297872340425) internal successors, (97), 44 states have internal predecessors, (97), 18 states have call successors, (19), 1 states have call predecessors, (19), 2 states have return successors, (19), 19 states have call predecessors, (19), 18 states have call successors, (19) Word has length 95 [2025-01-08 22:36:03,797 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-01-08 22:36:03,798 INFO L225 Difference]: With dead ends: 159 [2025-01-08 22:36:03,798 INFO L226 Difference]: Without dead ends: 157 [2025-01-08 22:36:03,798 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 226 GetRequests, 157 SyntacticMatches, 11 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1015 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=337, Invalid=3203, Unknown=0, NotChecked=0, Total=3540 [2025-01-08 22:36:03,799 INFO L435 NwaCegarLoop]: 29 mSDtfsCounter, 169 mSDsluCounter, 674 mSDsCounter, 0 mSdLazyCounter, 1542 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 170 SdHoareTripleChecker+Valid, 703 SdHoareTripleChecker+Invalid, 1573 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 1542 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2025-01-08 22:36:03,799 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [170 Valid, 703 Invalid, 1573 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 1542 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2025-01-08 22:36:03,799 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2025-01-08 22:36:03,813 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 98. [2025-01-08 22:36:03,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98 states, 76 states have (on average 1.0526315789473684) internal successors, (80), 77 states have internal predecessors, (80), 13 states have call successors, (13), 8 states have call predecessors, (13), 8 states have return successors, (13), 12 states have call predecessors, (13), 13 states have call successors, (13) [2025-01-08 22:36:03,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 106 transitions. [2025-01-08 22:36:03,813 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 106 transitions. Word has length 95 [2025-01-08 22:36:03,814 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-01-08 22:36:03,814 INFO L471 AbstractCegarLoop]: Abstraction has 98 states and 106 transitions. [2025-01-08 22:36:03,814 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 47 states have (on average 2.0638297872340425) internal successors, (97), 44 states have internal predecessors, (97), 18 states have call successors, (19), 1 states have call predecessors, (19), 2 states have return successors, (19), 19 states have call predecessors, (19), 18 states have call successors, (19) [2025-01-08 22:36:03,814 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 106 transitions. [2025-01-08 22:36:03,814 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2025-01-08 22:36:03,814 INFO L210 NwaCegarLoop]: Found error trace [2025-01-08 22:36:03,814 INFO L218 NwaCegarLoop]: trace histogram [10, 10, 10, 9, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-01-08 22:36:03,821 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2025-01-08 22:36:04,015 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2025-01-08 22:36:04,015 INFO L396 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-01-08 22:36:04,015 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-08 22:36:04,015 INFO L85 PathProgramCache]: Analyzing trace with hash -153098355, now seen corresponding path program 18 times [2025-01-08 22:36:04,015 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-08 22:36:04,015 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1316419558] [2025-01-08 22:36:04,015 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-01-08 22:36:04,015 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-08 22:36:04,022 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 98 statements into 10 equivalence classes. [2025-01-08 22:36:04,059 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) and asserted 98 of 98 statements. [2025-01-08 22:36:04,062 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2025-01-08 22:36:04,063 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-08 22:36:04,363 INFO L134 CoverageAnalysis]: Checked inductivity of 372 backedges. 78 proven. 114 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2025-01-08 22:36:04,364 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-08 22:36:04,364 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1316419558] [2025-01-08 22:36:04,364 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1316419558] provided 0 perfect and 1 imperfect interpolant sequences [2025-01-08 22:36:04,364 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [876326856] [2025-01-08 22:36:04,364 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-01-08 22:36:04,364 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-08 22:36:04,364 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-08 22:36:04,370 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-01-08 22:36:04,371 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2025-01-08 22:36:04,431 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 98 statements into 10 equivalence classes. [2025-01-08 22:36:04,574 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) and asserted 98 of 98 statements. [2025-01-08 22:36:04,574 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2025-01-08 22:36:04,574 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-08 22:36:04,576 INFO L256 TraceCheckSpWp]: Trace formula consists of 294 conjuncts, 20 conjuncts are in the unsatisfiable core [2025-01-08 22:36:04,577 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-08 22:36:04,758 INFO L134 CoverageAnalysis]: Checked inductivity of 372 backedges. 100 proven. 92 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2025-01-08 22:36:04,758 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-01-08 22:36:04,952 INFO L134 CoverageAnalysis]: Checked inductivity of 372 backedges. 100 proven. 92 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2025-01-08 22:36:04,953 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [876326856] provided 0 perfect and 2 imperfect interpolant sequences [2025-01-08 22:36:04,953 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-01-08 22:36:04,953 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20, 20] total 30 [2025-01-08 22:36:04,953 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [155451499] [2025-01-08 22:36:04,953 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-01-08 22:36:04,954 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2025-01-08 22:36:04,954 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-08 22:36:04,954 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2025-01-08 22:36:04,955 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=221, Invalid=649, Unknown=0, NotChecked=0, Total=870 [2025-01-08 22:36:04,955 INFO L87 Difference]: Start difference. First operand 98 states and 106 transitions. Second operand has 30 states, 30 states have (on average 2.7) internal successors, (81), 30 states have internal predecessors, (81), 9 states have call successors, (10), 1 states have call predecessors, (10), 1 states have return successors, (10), 9 states have call predecessors, (10), 9 states have call successors, (10) [2025-01-08 22:36:05,106 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-01-08 22:36:05,106 INFO L93 Difference]: Finished difference Result 158 states and 166 transitions. [2025-01-08 22:36:05,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2025-01-08 22:36:05,107 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.7) internal successors, (81), 30 states have internal predecessors, (81), 9 states have call successors, (10), 1 states have call predecessors, (10), 1 states have return successors, (10), 9 states have call predecessors, (10), 9 states have call successors, (10) Word has length 98 [2025-01-08 22:36:05,107 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-01-08 22:36:05,107 INFO L225 Difference]: With dead ends: 158 [2025-01-08 22:36:05,107 INFO L226 Difference]: Without dead ends: 128 [2025-01-08 22:36:05,108 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 222 GetRequests, 170 SyntacticMatches, 16 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 515 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=361, Invalid=1045, Unknown=0, NotChecked=0, Total=1406 [2025-01-08 22:36:05,108 INFO L435 NwaCegarLoop]: 25 mSDtfsCounter, 71 mSDsluCounter, 123 mSDsCounter, 0 mSdLazyCounter, 152 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 148 SdHoareTripleChecker+Invalid, 184 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 152 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-01-08 22:36:05,108 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [72 Valid, 148 Invalid, 184 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 152 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-01-08 22:36:05,108 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2025-01-08 22:36:05,121 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 95. [2025-01-08 22:36:05,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 73 states have (on average 1.0410958904109588) internal successors, (76), 74 states have internal predecessors, (76), 13 states have call successors, (13), 8 states have call predecessors, (13), 8 states have return successors, (13), 12 states have call predecessors, (13), 13 states have call successors, (13) [2025-01-08 22:36:05,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 102 transitions. [2025-01-08 22:36:05,121 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 102 transitions. Word has length 98 [2025-01-08 22:36:05,122 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-01-08 22:36:05,122 INFO L471 AbstractCegarLoop]: Abstraction has 95 states and 102 transitions. [2025-01-08 22:36:05,122 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.7) internal successors, (81), 30 states have internal predecessors, (81), 9 states have call successors, (10), 1 states have call predecessors, (10), 1 states have return successors, (10), 9 states have call predecessors, (10), 9 states have call successors, (10) [2025-01-08 22:36:05,122 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 102 transitions. [2025-01-08 22:36:05,122 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2025-01-08 22:36:05,122 INFO L210 NwaCegarLoop]: Found error trace [2025-01-08 22:36:05,122 INFO L218 NwaCegarLoop]: trace histogram [11, 11, 11, 9, 9, 9, 9, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-01-08 22:36:05,129 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2025-01-08 22:36:05,323 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2025-01-08 22:36:05,323 INFO L396 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-01-08 22:36:05,323 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-08 22:36:05,324 INFO L85 PathProgramCache]: Analyzing trace with hash 1919843416, now seen corresponding path program 19 times [2025-01-08 22:36:05,324 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-08 22:36:05,324 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [389132966] [2025-01-08 22:36:05,324 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-01-08 22:36:05,324 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-08 22:36:05,332 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 102 statements into 1 equivalence classes. [2025-01-08 22:36:05,347 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 102 of 102 statements. [2025-01-08 22:36:05,347 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-08 22:36:05,347 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-08 22:36:05,895 INFO L134 CoverageAnalysis]: Checked inductivity of 414 backedges. 27 proven. 221 refuted. 0 times theorem prover too weak. 166 trivial. 0 not checked. [2025-01-08 22:36:05,896 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-08 22:36:05,896 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [389132966] [2025-01-08 22:36:05,896 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [389132966] provided 0 perfect and 1 imperfect interpolant sequences [2025-01-08 22:36:05,896 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1643535978] [2025-01-08 22:36:05,896 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-01-08 22:36:05,896 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-08 22:36:05,896 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-08 22:36:05,898 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-01-08 22:36:05,899 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2025-01-08 22:36:05,962 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 102 statements into 1 equivalence classes. [2025-01-08 22:36:05,988 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 102 of 102 statements. [2025-01-08 22:36:05,988 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-08 22:36:05,988 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-08 22:36:05,989 INFO L256 TraceCheckSpWp]: Trace formula consists of 302 conjuncts, 62 conjuncts are in the unsatisfiable core [2025-01-08 22:36:05,991 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-08 22:36:06,431 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 [2025-01-08 22:36:06,519 INFO L190 IndexEqualityManager]: detected not equals via solver [2025-01-08 22:36:06,521 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 27 treesize of output 11 [2025-01-08 22:36:06,889 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 [2025-01-08 22:36:06,916 INFO L134 CoverageAnalysis]: Checked inductivity of 414 backedges. 61 proven. 221 refuted. 0 times theorem prover too weak. 132 trivial. 0 not checked. [2025-01-08 22:36:06,916 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-01-08 22:36:07,162 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 21 treesize of output 19 [2025-01-08 22:36:07,165 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 21 [2025-01-08 22:36:07,327 INFO L134 CoverageAnalysis]: Checked inductivity of 414 backedges. 27 proven. 221 refuted. 0 times theorem prover too weak. 166 trivial. 0 not checked. [2025-01-08 22:36:07,327 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1643535978] provided 0 perfect and 2 imperfect interpolant sequences [2025-01-08 22:36:07,327 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-01-08 22:36:07,327 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 28, 26] total 54 [2025-01-08 22:36:07,328 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1715867231] [2025-01-08 22:36:07,328 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-01-08 22:36:07,328 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 54 states [2025-01-08 22:36:07,328 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-08 22:36:07,328 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2025-01-08 22:36:07,329 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=231, Invalid=2631, Unknown=0, NotChecked=0, Total=2862 [2025-01-08 22:36:07,329 INFO L87 Difference]: Start difference. First operand 95 states and 102 transitions. Second operand has 54 states, 52 states have (on average 2.1153846153846154) internal successors, (110), 49 states have internal predecessors, (110), 21 states have call successors, (22), 2 states have call predecessors, (22), 3 states have return successors, (22), 22 states have call predecessors, (22), 21 states have call successors, (22) [2025-01-08 22:36:08,174 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-01-08 22:36:08,174 INFO L93 Difference]: Finished difference Result 131 states and 136 transitions. [2025-01-08 22:36:08,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2025-01-08 22:36:08,175 INFO L78 Accepts]: Start accepts. Automaton has has 54 states, 52 states have (on average 2.1153846153846154) internal successors, (110), 49 states have internal predecessors, (110), 21 states have call successors, (22), 2 states have call predecessors, (22), 3 states have return successors, (22), 22 states have call predecessors, (22), 21 states have call successors, (22) Word has length 102 [2025-01-08 22:36:08,175 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-01-08 22:36:08,176 INFO L225 Difference]: With dead ends: 131 [2025-01-08 22:36:08,176 INFO L226 Difference]: Without dead ends: 129 [2025-01-08 22:36:08,176 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 243 GetRequests, 166 SyntacticMatches, 12 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1411 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=389, Invalid=4033, Unknown=0, NotChecked=0, Total=4422 [2025-01-08 22:36:08,177 INFO L435 NwaCegarLoop]: 30 mSDtfsCounter, 97 mSDsluCounter, 585 mSDsCounter, 0 mSdLazyCounter, 1501 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 97 SdHoareTripleChecker+Valid, 615 SdHoareTripleChecker+Invalid, 1522 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 1501 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2025-01-08 22:36:08,178 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [97 Valid, 615 Invalid, 1522 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 1501 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2025-01-08 22:36:08,178 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2025-01-08 22:36:08,197 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 126. [2025-01-08 22:36:08,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 126 states, 102 states have (on average 1.0392156862745099) internal successors, (106), 103 states have internal predecessors, (106), 13 states have call successors, (13), 10 states have call predecessors, (13), 10 states have return successors, (13), 12 states have call predecessors, (13), 13 states have call successors, (13) [2025-01-08 22:36:08,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 132 transitions. [2025-01-08 22:36:08,198 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 132 transitions. Word has length 102 [2025-01-08 22:36:08,200 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-01-08 22:36:08,201 INFO L471 AbstractCegarLoop]: Abstraction has 126 states and 132 transitions. [2025-01-08 22:36:08,201 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 54 states, 52 states have (on average 2.1153846153846154) internal successors, (110), 49 states have internal predecessors, (110), 21 states have call successors, (22), 2 states have call predecessors, (22), 3 states have return successors, (22), 22 states have call predecessors, (22), 21 states have call successors, (22) [2025-01-08 22:36:08,201 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 132 transitions. [2025-01-08 22:36:08,201 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2025-01-08 22:36:08,201 INFO L210 NwaCegarLoop]: Found error trace [2025-01-08 22:36:08,203 INFO L218 NwaCegarLoop]: trace histogram [12, 12, 12, 10, 10, 10, 10, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-01-08 22:36:08,209 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2025-01-08 22:36:08,403 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2025-01-08 22:36:08,403 INFO L396 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-01-08 22:36:08,403 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-08 22:36:08,403 INFO L85 PathProgramCache]: Analyzing trace with hash 504943341, now seen corresponding path program 20 times [2025-01-08 22:36:08,404 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-08 22:36:08,404 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1154070242] [2025-01-08 22:36:08,404 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-01-08 22:36:08,404 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-08 22:36:08,411 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 106 statements into 2 equivalence classes. [2025-01-08 22:36:08,419 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 106 of 106 statements. [2025-01-08 22:36:08,419 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-01-08 22:36:08,419 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-08 22:36:08,955 INFO L134 CoverageAnalysis]: Checked inductivity of 466 backedges. 27 proven. 235 refuted. 0 times theorem prover too weak. 204 trivial. 0 not checked. [2025-01-08 22:36:08,955 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-08 22:36:08,955 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1154070242] [2025-01-08 22:36:08,955 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1154070242] provided 0 perfect and 1 imperfect interpolant sequences [2025-01-08 22:36:08,955 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1298050120] [2025-01-08 22:36:08,955 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-01-08 22:36:08,955 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-08 22:36:08,955 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-08 22:36:08,957 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-01-08 22:36:08,958 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2025-01-08 22:36:09,022 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 106 statements into 2 equivalence classes. [2025-01-08 22:36:09,050 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 106 of 106 statements. [2025-01-08 22:36:09,051 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-01-08 22:36:09,051 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-08 22:36:09,058 INFO L256 TraceCheckSpWp]: Trace formula consists of 310 conjuncts, 56 conjuncts are in the unsatisfiable core [2025-01-08 22:36:09,060 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-08 22:36:09,424 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2025-01-08 22:36:09,522 INFO L190 IndexEqualityManager]: detected not equals via solver [2025-01-08 22:36:09,523 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 27 treesize of output 11 [2025-01-08 22:36:09,621 INFO L190 IndexEqualityManager]: detected not equals via solver [2025-01-08 22:36:09,622 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 27 treesize of output 11 [2025-01-08 22:36:09,723 INFO L190 IndexEqualityManager]: detected not equals via solver [2025-01-08 22:36:09,723 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 27 treesize of output 11 [2025-01-08 22:36:10,030 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 [2025-01-08 22:36:10,061 INFO L134 CoverageAnalysis]: Checked inductivity of 466 backedges. 123 proven. 229 refuted. 0 times theorem prover too weak. 114 trivial. 0 not checked. [2025-01-08 22:36:10,061 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-01-08 22:36:10,346 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 20 treesize of output 18 [2025-01-08 22:36:10,349 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 24 treesize of output 20 [2025-01-08 22:36:10,490 INFO L134 CoverageAnalysis]: Checked inductivity of 466 backedges. 24 proven. 235 refuted. 0 times theorem prover too weak. 207 trivial. 0 not checked. [2025-01-08 22:36:10,490 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1298050120] provided 0 perfect and 2 imperfect interpolant sequences [2025-01-08 22:36:10,491 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-01-08 22:36:10,491 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 27, 24] total 50 [2025-01-08 22:36:10,491 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [355385782] [2025-01-08 22:36:10,491 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-01-08 22:36:10,491 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2025-01-08 22:36:10,491 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-08 22:36:10,492 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2025-01-08 22:36:10,492 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=220, Invalid=2230, Unknown=0, NotChecked=0, Total=2450 [2025-01-08 22:36:10,492 INFO L87 Difference]: Start difference. First operand 126 states and 132 transitions. Second operand has 50 states, 49 states have (on average 2.183673469387755) internal successors, (107), 46 states have internal predecessors, (107), 22 states have call successors, (23), 2 states have call predecessors, (23), 3 states have return successors, (23), 23 states have call predecessors, (23), 22 states have call successors, (23) [2025-01-08 22:36:11,427 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-01-08 22:36:11,427 INFO L93 Difference]: Finished difference Result 134 states and 139 transitions. [2025-01-08 22:36:11,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2025-01-08 22:36:11,428 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 49 states have (on average 2.183673469387755) internal successors, (107), 46 states have internal predecessors, (107), 22 states have call successors, (23), 2 states have call predecessors, (23), 3 states have return successors, (23), 23 states have call predecessors, (23), 22 states have call successors, (23) Word has length 106 [2025-01-08 22:36:11,428 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-01-08 22:36:11,428 INFO L225 Difference]: With dead ends: 134 [2025-01-08 22:36:11,428 INFO L226 Difference]: Without dead ends: 132 [2025-01-08 22:36:11,429 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 250 GetRequests, 172 SyntacticMatches, 17 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1410 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=377, Invalid=3529, Unknown=0, NotChecked=0, Total=3906 [2025-01-08 22:36:11,429 INFO L435 NwaCegarLoop]: 33 mSDtfsCounter, 71 mSDsluCounter, 618 mSDsCounter, 0 mSdLazyCounter, 1689 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 71 SdHoareTripleChecker+Valid, 651 SdHoareTripleChecker+Invalid, 1706 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 1689 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2025-01-08 22:36:11,429 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [71 Valid, 651 Invalid, 1706 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 1689 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2025-01-08 22:36:11,430 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2025-01-08 22:36:11,443 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 98. [2025-01-08 22:36:11,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98 states, 77 states have (on average 1.025974025974026) internal successors, (79), 77 states have internal predecessors, (79), 11 states have call successors, (11), 9 states have call predecessors, (11), 9 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2025-01-08 22:36:11,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 101 transitions. [2025-01-08 22:36:11,444 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 101 transitions. Word has length 106 [2025-01-08 22:36:11,444 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-01-08 22:36:11,444 INFO L471 AbstractCegarLoop]: Abstraction has 98 states and 101 transitions. [2025-01-08 22:36:11,444 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 49 states have (on average 2.183673469387755) internal successors, (107), 46 states have internal predecessors, (107), 22 states have call successors, (23), 2 states have call predecessors, (23), 3 states have return successors, (23), 23 states have call predecessors, (23), 22 states have call successors, (23) [2025-01-08 22:36:11,444 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 101 transitions. [2025-01-08 22:36:11,445 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2025-01-08 22:36:11,445 INFO L210 NwaCegarLoop]: Found error trace [2025-01-08 22:36:11,445 INFO L218 NwaCegarLoop]: trace histogram [11, 11, 11, 9, 9, 9, 9, 9, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-01-08 22:36:11,453 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Ended with exit code 0 [2025-01-08 22:36:11,645 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2025-01-08 22:36:11,645 INFO L396 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-01-08 22:36:11,646 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-08 22:36:11,646 INFO L85 PathProgramCache]: Analyzing trace with hash -2019490244, now seen corresponding path program 21 times [2025-01-08 22:36:11,646 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-08 22:36:11,646 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [64552146] [2025-01-08 22:36:11,646 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-01-08 22:36:11,646 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-08 22:36:11,653 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 105 statements into 11 equivalence classes. [2025-01-08 22:36:11,699 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) and asserted 105 of 105 statements. [2025-01-08 22:36:11,700 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2025-01-08 22:36:11,700 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-08 22:36:12,306 INFO L134 CoverageAnalysis]: Checked inductivity of 437 backedges. 93 proven. 178 refuted. 0 times theorem prover too weak. 166 trivial. 0 not checked. [2025-01-08 22:36:12,306 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-08 22:36:12,306 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [64552146] [2025-01-08 22:36:12,306 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [64552146] provided 0 perfect and 1 imperfect interpolant sequences [2025-01-08 22:36:12,306 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [631934945] [2025-01-08 22:36:12,306 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-01-08 22:36:12,307 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-08 22:36:12,307 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-08 22:36:12,308 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-01-08 22:36:12,309 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2025-01-08 22:36:12,376 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 105 statements into 11 equivalence classes.