./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/list-ext3-properties/sll_nondet_insert-2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version c00e63dc 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/list-ext3-properties/sll_nondet_insert-2.i -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 5bf92ba2f935aadbe2c0ae3d366f72b4144ff6b8b5ce7c503e628d249b478be5 --- Real Ultimate output --- This is Ultimate 0.3.0-?-c00e63d-m [2025-02-05 14:42:42,393 INFO L188 SettingsManager]: Resetting all preferences to default values... [2025-02-05 14:42:42,427 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2025-02-05 14:42:42,431 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2025-02-05 14:42:42,431 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2025-02-05 14:42:42,445 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2025-02-05 14:42:42,446 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2025-02-05 14:42:42,446 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2025-02-05 14:42:42,446 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2025-02-05 14:42:42,446 INFO L153 SettingsManager]: * Use memory slicer=true [2025-02-05 14:42:42,446 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2025-02-05 14:42:42,446 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2025-02-05 14:42:42,447 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2025-02-05 14:42:42,447 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2025-02-05 14:42:42,447 INFO L153 SettingsManager]: * Use SBE=true [2025-02-05 14:42:42,447 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2025-02-05 14:42:42,447 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2025-02-05 14:42:42,447 INFO L153 SettingsManager]: * sizeof long=4 [2025-02-05 14:42:42,447 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2025-02-05 14:42:42,447 INFO L153 SettingsManager]: * sizeof POINTER=4 [2025-02-05 14:42:42,447 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2025-02-05 14:42:42,448 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2025-02-05 14:42:42,448 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2025-02-05 14:42:42,448 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2025-02-05 14:42:42,448 INFO L153 SettingsManager]: * sizeof long double=12 [2025-02-05 14:42:42,448 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2025-02-05 14:42:42,448 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2025-02-05 14:42:42,448 INFO L153 SettingsManager]: * Use constant arrays=true [2025-02-05 14:42:42,448 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2025-02-05 14:42:42,448 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2025-02-05 14:42:42,448 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2025-02-05 14:42:42,448 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2025-02-05 14:42:42,449 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-02-05 14:42:42,449 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2025-02-05 14:42:42,449 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2025-02-05 14:42:42,449 INFO L153 SettingsManager]: * Compute procedure contracts=false [2025-02-05 14:42:42,449 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2025-02-05 14:42:42,449 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2025-02-05 14:42:42,449 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2025-02-05 14:42:42,449 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2025-02-05 14:42:42,449 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2025-02-05 14:42:42,449 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2025-02-05 14:42:42,449 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2025-02-05 14:42:42,449 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 -> 5bf92ba2f935aadbe2c0ae3d366f72b4144ff6b8b5ce7c503e628d249b478be5 [2025-02-05 14:42:42,752 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2025-02-05 14:42:42,769 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2025-02-05 14:42:42,771 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2025-02-05 14:42:42,772 INFO L270 PluginConnector]: Initializing CDTParser... [2025-02-05 14:42:42,772 INFO L274 PluginConnector]: CDTParser initialized [2025-02-05 14:42:42,778 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/list-ext3-properties/sll_nondet_insert-2.i [2025-02-05 14:42:44,074 INFO L533 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/9c0fd03b8/ea2a08f8ec80409083afb6b38350b87a/FLAG1ae92eaec [2025-02-05 14:42:44,333 INFO L384 CDTParser]: Found 1 translation units. [2025-02-05 14:42:44,333 INFO L180 CDTParser]: Scanning /storage/repos/ultimate-jdk21/releaseScripts/default/sv-benchmarks/c/list-ext3-properties/sll_nondet_insert-2.i [2025-02-05 14:42:44,351 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/9c0fd03b8/ea2a08f8ec80409083afb6b38350b87a/FLAG1ae92eaec [2025-02-05 14:42:44,365 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/9c0fd03b8/ea2a08f8ec80409083afb6b38350b87a [2025-02-05 14:42:44,367 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2025-02-05 14:42:44,370 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2025-02-05 14:42:44,372 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2025-02-05 14:42:44,372 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2025-02-05 14:42:44,375 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2025-02-05 14:42:44,376 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 05.02 02:42:44" (1/1) ... [2025-02-05 14:42:44,378 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@33ff858a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.02 02:42:44, skipping insertion in model container [2025-02-05 14:42:44,378 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 05.02 02:42:44" (1/1) ... [2025-02-05 14:42:44,408 INFO L175 MainTranslator]: Built tables and reachable declarations [2025-02-05 14:42:44,671 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/list-ext3-properties/sll_nondet_insert-2.i[24494,24507] [2025-02-05 14:42:44,673 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-02-05 14:42:44,687 INFO L200 MainTranslator]: Completed pre-run [2025-02-05 14:42:44,717 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/list-ext3-properties/sll_nondet_insert-2.i[24494,24507] [2025-02-05 14:42:44,718 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-02-05 14:42:44,753 INFO L204 MainTranslator]: Completed translation [2025-02-05 14:42:44,753 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.02 02:42:44 WrapperNode [2025-02-05 14:42:44,754 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2025-02-05 14:42:44,755 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2025-02-05 14:42:44,755 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2025-02-05 14:42:44,755 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2025-02-05 14:42:44,769 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.02 02:42:44" (1/1) ... [2025-02-05 14:42:44,785 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.02 02:42:44" (1/1) ... [2025-02-05 14:42:44,812 INFO L138 Inliner]: procedures = 129, calls = 33, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 120 [2025-02-05 14:42:44,812 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2025-02-05 14:42:44,813 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2025-02-05 14:42:44,813 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2025-02-05 14:42:44,813 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2025-02-05 14:42:44,825 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.02 02:42:44" (1/1) ... [2025-02-05 14:42:44,825 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.02 02:42:44" (1/1) ... [2025-02-05 14:42:44,831 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.02 02:42:44" (1/1) ... [2025-02-05 14:42:44,850 INFO L175 MemorySlicer]: Split 13 memory accesses to 3 slices as follows [2, 6, 5]. 46 percent of accesses are in the largest equivalence class. The 3 initializations are split as follows [2, 0, 1]. The 4 writes are split as follows [0, 3, 1]. [2025-02-05 14:42:44,850 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.02 02:42:44" (1/1) ... [2025-02-05 14:42:44,850 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.02 02:42:44" (1/1) ... [2025-02-05 14:42:44,860 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.02 02:42:44" (1/1) ... [2025-02-05 14:42:44,860 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.02 02:42:44" (1/1) ... [2025-02-05 14:42:44,861 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.02 02:42:44" (1/1) ... [2025-02-05 14:42:44,862 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.02 02:42:44" (1/1) ... [2025-02-05 14:42:44,867 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2025-02-05 14:42:44,868 INFO L112 PluginConnector]: ------------------------IcfgBuilder---------------------------- [2025-02-05 14:42:44,868 INFO L270 PluginConnector]: Initializing IcfgBuilder... [2025-02-05 14:42:44,868 INFO L274 PluginConnector]: IcfgBuilder initialized [2025-02-05 14:42:44,868 INFO L184 PluginConnector]: Executing the observer IcfgBuilderObserver from plugin IcfgBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.02 02:42:44" (1/1) ... [2025-02-05 14:42:44,878 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-02-05 14:42:44,889 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-05 14:42:44,906 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2025-02-05 14:42:44,910 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2025-02-05 14:42:44,926 INFO L130 BoogieDeclarations]: Found specification of procedure myexit [2025-02-05 14:42:44,926 INFO L138 BoogieDeclarations]: Found implementation of procedure myexit [2025-02-05 14:42:44,926 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2025-02-05 14:42:44,926 INFO L130 BoogieDeclarations]: Found specification of procedure _get_nondet_int [2025-02-05 14:42:44,926 INFO L138 BoogieDeclarations]: Found implementation of procedure _get_nondet_int [2025-02-05 14:42:44,926 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2025-02-05 14:42:44,926 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2025-02-05 14:42:44,926 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#0 [2025-02-05 14:42:44,926 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#1 [2025-02-05 14:42:44,926 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#2 [2025-02-05 14:42:44,926 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#0 [2025-02-05 14:42:44,926 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#1 [2025-02-05 14:42:44,926 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#2 [2025-02-05 14:42:44,926 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2025-02-05 14:42:44,926 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#0 [2025-02-05 14:42:44,926 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#1 [2025-02-05 14:42:44,926 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#2 [2025-02-05 14:42:44,926 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2025-02-05 14:42:44,926 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2025-02-05 14:42:44,926 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2025-02-05 14:42:44,926 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2025-02-05 14:42:44,927 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2025-02-05 14:42:45,003 INFO L257 CfgBuilder]: Building ICFG [2025-02-05 14:42:45,004 INFO L287 CfgBuilder]: Building CFG for each procedure with an implementation [2025-02-05 14:42:45,022 INFO L1309 $ProcedureCfgBuilder]: dead code at ProgramPoint myexitFINAL: assume true; [2025-02-05 14:42:45,178 INFO L1309 $ProcedureCfgBuilder]: dead code at ProgramPoint L628: call ULTIMATE.dealloc(main_~#s~0#1.base, main_~#s~0#1.offset);havoc main_~#s~0#1.base, main_~#s~0#1.offset; [2025-02-05 14:42:45,190 INFO L? ?]: Removed 47 outVars from TransFormulas that were not future-live. [2025-02-05 14:42:45,190 INFO L308 CfgBuilder]: Performing block encoding [2025-02-05 14:42:45,196 INFO L332 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2025-02-05 14:42:45,196 INFO L337 CfgBuilder]: Removed 0 assume(true) statements. [2025-02-05 14:42:45,197 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 05.02 02:42:45 BoogieIcfgContainer [2025-02-05 14:42:45,197 INFO L131 PluginConnector]: ------------------------ END IcfgBuilder---------------------------- [2025-02-05 14:42:45,198 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2025-02-05 14:42:45,198 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2025-02-05 14:42:45,202 INFO L274 PluginConnector]: TraceAbstraction initialized [2025-02-05 14:42:45,202 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 05.02 02:42:44" (1/3) ... [2025-02-05 14:42:45,202 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6368e2e8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 05.02 02:42:45, skipping insertion in model container [2025-02-05 14:42:45,202 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.02 02:42:44" (2/3) ... [2025-02-05 14:42:45,204 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6368e2e8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 05.02 02:42:45, skipping insertion in model container [2025-02-05 14:42:45,204 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 05.02 02:42:45" (3/3) ... [2025-02-05 14:42:45,205 INFO L128 eAbstractionObserver]: Analyzing ICFG sll_nondet_insert-2.i [2025-02-05 14:42:45,218 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2025-02-05 14:42:45,219 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG sll_nondet_insert-2.i that has 3 procedures, 44 locations, 1 initial locations, 6 loop locations, and 1 error locations. [2025-02-05 14:42:45,251 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2025-02-05 14:42:45,261 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;@3e435472, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2025-02-05 14:42:45,262 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2025-02-05 14:42:45,266 INFO L276 IsEmpty]: Start isEmpty. Operand has 43 states, 35 states have (on average 1.4285714285714286) internal successors, (50), 37 states have internal predecessors, (50), 5 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2025-02-05 14:42:45,270 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2025-02-05 14:42:45,270 INFO L210 NwaCegarLoop]: Found error trace [2025-02-05 14:42:45,270 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-05 14:42:45,271 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-05 14:42:45,275 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-05 14:42:45,276 INFO L85 PathProgramCache]: Analyzing trace with hash -2064314670, now seen corresponding path program 1 times [2025-02-05 14:42:45,281 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-05 14:42:45,283 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [493470203] [2025-02-05 14:42:45,284 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-05 14:42:45,284 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-05 14:42:45,348 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 24 statements into 1 equivalence classes. [2025-02-05 14:42:45,356 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 24 of 24 statements. [2025-02-05 14:42:45,356 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-05 14:42:45,356 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 14:42:45,389 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-02-05 14:42:45,389 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-05 14:42:45,389 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [493470203] [2025-02-05 14:42:45,390 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [493470203] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-05 14:42:45,390 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [778711864] [2025-02-05 14:42:45,390 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-05 14:42:45,390 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 14:42:45,391 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-05 14:42:45,393 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-05 14:42:45,394 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2025-02-05 14:42:45,454 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 24 statements into 1 equivalence classes. [2025-02-05 14:42:45,474 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 24 of 24 statements. [2025-02-05 14:42:45,474 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-05 14:42:45,474 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 14:42:45,476 INFO L256 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 1 conjuncts are in the unsatisfiable core [2025-02-05 14:42:45,478 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-05 14:42:45,485 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-02-05 14:42:45,485 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-02-05 14:42:45,485 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [778711864] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-05 14:42:45,485 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2025-02-05 14:42:45,485 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [2] total 2 [2025-02-05 14:42:45,487 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2084062625] [2025-02-05 14:42:45,487 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-05 14:42:45,490 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2025-02-05 14:42:45,490 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-05 14:42:45,501 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2025-02-05 14:42:45,502 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2025-02-05 14:42:45,503 INFO L87 Difference]: Start difference. First operand has 43 states, 35 states have (on average 1.4285714285714286) internal successors, (50), 37 states have internal predecessors, (50), 5 states have call successors, (5), 2 states have call predecessors, (5), 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 9.0) internal successors, (18), 2 states have internal predecessors, (18), 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) [2025-02-05 14:42:45,514 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-05 14:42:45,515 INFO L93 Difference]: Finished difference Result 83 states and 115 transitions. [2025-02-05 14:42:45,515 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2025-02-05 14:42:45,516 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 9.0) internal successors, (18), 2 states have internal predecessors, (18), 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 24 [2025-02-05 14:42:45,516 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-05 14:42:45,520 INFO L225 Difference]: With dead ends: 83 [2025-02-05 14:42:45,520 INFO L226 Difference]: Without dead ends: 34 [2025-02-05 14:42:45,522 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2025-02-05 14:42:45,523 INFO L435 NwaCegarLoop]: 54 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, 54 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-02-05 14:42:45,524 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 54 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-02-05 14:42:45,532 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2025-02-05 14:42:45,541 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2025-02-05 14:42:45,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 29 states have (on average 1.2413793103448276) internal successors, (36), 29 states have internal predecessors, (36), 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) [2025-02-05 14:42:45,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 42 transitions. [2025-02-05 14:42:45,545 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 42 transitions. Word has length 24 [2025-02-05 14:42:45,545 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-05 14:42:45,545 INFO L471 AbstractCegarLoop]: Abstraction has 34 states and 42 transitions. [2025-02-05 14:42:45,545 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 9.0) internal successors, (18), 2 states have internal predecessors, (18), 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) [2025-02-05 14:42:45,545 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 42 transitions. [2025-02-05 14:42:45,546 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2025-02-05 14:42:45,546 INFO L210 NwaCegarLoop]: Found error trace [2025-02-05 14:42:45,546 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-05 14:42:45,553 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2025-02-05 14:42:45,747 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 [2025-02-05 14:42:45,747 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-05 14:42:45,748 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-05 14:42:45,748 INFO L85 PathProgramCache]: Analyzing trace with hash -108265213, now seen corresponding path program 1 times [2025-02-05 14:42:45,748 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-05 14:42:45,748 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1354634405] [2025-02-05 14:42:45,748 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-05 14:42:45,748 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-05 14:42:45,757 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 29 statements into 1 equivalence classes. [2025-02-05 14:42:45,770 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 29 of 29 statements. [2025-02-05 14:42:45,770 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-05 14:42:45,770 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 14:42:46,013 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-02-05 14:42:46,013 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-05 14:42:46,013 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1354634405] [2025-02-05 14:42:46,013 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1354634405] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-05 14:42:46,013 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1821752938] [2025-02-05 14:42:46,013 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-05 14:42:46,013 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 14:42:46,013 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-05 14:42:46,020 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-05 14:42:46,021 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2025-02-05 14:42:46,087 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 29 statements into 1 equivalence classes. [2025-02-05 14:42:46,109 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 29 of 29 statements. [2025-02-05 14:42:46,109 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-05 14:42:46,109 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 14:42:46,110 INFO L256 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 10 conjuncts are in the unsatisfiable core [2025-02-05 14:42:46,114 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-05 14:42:46,194 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-05 14:42:46,195 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-02-05 14:42:46,196 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1821752938] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-05 14:42:46,196 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2025-02-05 14:42:46,196 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7] total 12 [2025-02-05 14:42:46,196 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2036489536] [2025-02-05 14:42:46,197 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-05 14:42:46,198 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2025-02-05 14:42:46,199 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-05 14:42:46,199 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2025-02-05 14:42:46,199 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2025-02-05 14:42:46,201 INFO L87 Difference]: Start difference. First operand 34 states and 42 transitions. Second operand has 7 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 6 states have internal predecessors, (25), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2025-02-05 14:42:46,255 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-05 14:42:46,256 INFO L93 Difference]: Finished difference Result 62 states and 77 transitions. [2025-02-05 14:42:46,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2025-02-05 14:42:46,256 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 6 states have internal predecessors, (25), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 29 [2025-02-05 14:42:46,257 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-05 14:42:46,257 INFO L225 Difference]: With dead ends: 62 [2025-02-05 14:42:46,257 INFO L226 Difference]: Without dead ends: 36 [2025-02-05 14:42:46,257 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2025-02-05 14:42:46,258 INFO L435 NwaCegarLoop]: 33 mSDtfsCounter, 1 mSDsluCounter, 149 mSDsCounter, 0 mSdLazyCounter, 60 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 182 SdHoareTripleChecker+Invalid, 61 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 60 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-02-05 14:42:46,258 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 182 Invalid, 61 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 60 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-02-05 14:42:46,259 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2025-02-05 14:42:46,261 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2025-02-05 14:42:46,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 31 states have (on average 1.2258064516129032) internal successors, (38), 31 states have internal predecessors, (38), 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) [2025-02-05 14:42:46,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 44 transitions. [2025-02-05 14:42:46,262 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 44 transitions. Word has length 29 [2025-02-05 14:42:46,262 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-05 14:42:46,263 INFO L471 AbstractCegarLoop]: Abstraction has 36 states and 44 transitions. [2025-02-05 14:42:46,263 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 6 states have internal predecessors, (25), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2025-02-05 14:42:46,263 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 44 transitions. [2025-02-05 14:42:46,263 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2025-02-05 14:42:46,263 INFO L210 NwaCegarLoop]: Found error trace [2025-02-05 14:42:46,263 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-05 14:42:46,270 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2025-02-05 14:42:46,468 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 14:42:46,468 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-05 14:42:46,469 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-05 14:42:46,469 INFO L85 PathProgramCache]: Analyzing trace with hash 821514783, now seen corresponding path program 1 times [2025-02-05 14:42:46,469 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-05 14:42:46,469 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [545701428] [2025-02-05 14:42:46,469 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-05 14:42:46,469 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-05 14:42:46,478 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 33 statements into 1 equivalence classes. [2025-02-05 14:42:46,483 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 33 of 33 statements. [2025-02-05 14:42:46,483 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-05 14:42:46,483 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 14:42:46,580 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-02-05 14:42:46,581 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-05 14:42:46,581 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [545701428] [2025-02-05 14:42:46,581 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [545701428] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-05 14:42:46,581 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1321100360] [2025-02-05 14:42:46,581 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-05 14:42:46,581 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 14:42:46,581 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-05 14:42:46,587 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-05 14:42:46,592 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2025-02-05 14:42:46,638 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 33 statements into 1 equivalence classes. [2025-02-05 14:42:46,655 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 33 of 33 statements. [2025-02-05 14:42:46,655 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-05 14:42:46,656 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 14:42:46,657 INFO L256 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 12 conjuncts are in the unsatisfiable core [2025-02-05 14:42:46,658 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-05 14:42:46,740 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 7 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-05 14:42:46,741 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-05 14:42:46,892 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-02-05 14:42:46,892 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1321100360] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-05 14:42:46,892 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-05 14:42:46,892 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 15 [2025-02-05 14:42:46,893 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1549350737] [2025-02-05 14:42:46,893 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-05 14:42:46,893 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2025-02-05 14:42:46,893 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-05 14:42:46,893 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2025-02-05 14:42:46,893 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2025-02-05 14:42:46,894 INFO L87 Difference]: Start difference. First operand 36 states and 44 transitions. Second operand has 15 states, 15 states have (on average 3.533333333333333) internal successors, (53), 13 states have internal predecessors, (53), 2 states have call successors, (3), 2 states have call predecessors, (3), 5 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2025-02-05 14:42:47,029 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-05 14:42:47,030 INFO L93 Difference]: Finished difference Result 87 states and 110 transitions. [2025-02-05 14:42:47,030 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2025-02-05 14:42:47,030 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.533333333333333) internal successors, (53), 13 states have internal predecessors, (53), 2 states have call successors, (3), 2 states have call predecessors, (3), 5 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) Word has length 33 [2025-02-05 14:42:47,031 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-05 14:42:47,032 INFO L225 Difference]: With dead ends: 87 [2025-02-05 14:42:47,032 INFO L226 Difference]: Without dead ends: 61 [2025-02-05 14:42:47,032 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 57 SyntacticMatches, 4 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=66, Invalid=314, Unknown=0, NotChecked=0, Total=380 [2025-02-05 14:42:47,033 INFO L435 NwaCegarLoop]: 36 mSDtfsCounter, 15 mSDsluCounter, 268 mSDsCounter, 0 mSdLazyCounter, 136 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 304 SdHoareTripleChecker+Invalid, 144 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 136 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-02-05 14:42:47,033 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 304 Invalid, 144 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 136 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-02-05 14:42:47,034 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2025-02-05 14:42:47,037 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 40. [2025-02-05 14:42:47,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 35 states have (on average 1.2) internal successors, (42), 35 states have internal predecessors, (42), 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) [2025-02-05 14:42:47,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 48 transitions. [2025-02-05 14:42:47,038 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 48 transitions. Word has length 33 [2025-02-05 14:42:47,038 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-05 14:42:47,038 INFO L471 AbstractCegarLoop]: Abstraction has 40 states and 48 transitions. [2025-02-05 14:42:47,038 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.533333333333333) internal successors, (53), 13 states have internal predecessors, (53), 2 states have call successors, (3), 2 states have call predecessors, (3), 5 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2025-02-05 14:42:47,039 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 48 transitions. [2025-02-05 14:42:47,039 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2025-02-05 14:42:47,039 INFO L210 NwaCegarLoop]: Found error trace [2025-02-05 14:42:47,039 INFO L218 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-05 14:42:47,045 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2025-02-05 14:42:47,244 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 14:42:47,244 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-05 14:42:47,245 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-05 14:42:47,246 INFO L85 PathProgramCache]: Analyzing trace with hash 836547899, now seen corresponding path program 2 times [2025-02-05 14:42:47,246 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-05 14:42:47,246 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1087772142] [2025-02-05 14:42:47,246 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-05 14:42:47,246 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-05 14:42:47,255 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 37 statements into 2 equivalence classes. [2025-02-05 14:42:47,262 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 37 of 37 statements. [2025-02-05 14:42:47,262 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-02-05 14:42:47,262 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 14:42:47,330 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2025-02-05 14:42:47,331 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-05 14:42:47,331 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1087772142] [2025-02-05 14:42:47,331 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1087772142] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-05 14:42:47,331 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-05 14:42:47,331 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2025-02-05 14:42:47,331 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2141473558] [2025-02-05 14:42:47,331 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-05 14:42:47,332 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2025-02-05 14:42:47,332 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-05 14:42:47,332 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2025-02-05 14:42:47,332 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2025-02-05 14:42:47,332 INFO L87 Difference]: Start difference. First operand 40 states and 48 transitions. Second operand has 7 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 7 states have internal predecessors, (26), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2025-02-05 14:42:47,384 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-05 14:42:47,384 INFO L93 Difference]: Finished difference Result 60 states and 72 transitions. [2025-02-05 14:42:47,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2025-02-05 14:42:47,385 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 7 states have internal predecessors, (26), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 37 [2025-02-05 14:42:47,385 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-05 14:42:47,385 INFO L225 Difference]: With dead ends: 60 [2025-02-05 14:42:47,385 INFO L226 Difference]: Without dead ends: 56 [2025-02-05 14:42:47,386 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2025-02-05 14:42:47,386 INFO L435 NwaCegarLoop]: 35 mSDtfsCounter, 19 mSDsluCounter, 160 mSDsCounter, 0 mSdLazyCounter, 67 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 195 SdHoareTripleChecker+Invalid, 67 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 67 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-02-05 14:42:47,386 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 195 Invalid, 67 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 67 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-02-05 14:42:47,387 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2025-02-05 14:42:47,390 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 51. [2025-02-05 14:42:47,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 45 states have (on average 1.2222222222222223) internal successors, (55), 45 states have internal predecessors, (55), 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) [2025-02-05 14:42:47,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 63 transitions. [2025-02-05 14:42:47,391 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 63 transitions. Word has length 37 [2025-02-05 14:42:47,391 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-05 14:42:47,391 INFO L471 AbstractCegarLoop]: Abstraction has 51 states and 63 transitions. [2025-02-05 14:42:47,391 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 7 states have internal predecessors, (26), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2025-02-05 14:42:47,391 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 63 transitions. [2025-02-05 14:42:47,392 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2025-02-05 14:42:47,392 INFO L210 NwaCegarLoop]: Found error trace [2025-02-05 14:42:47,392 INFO L218 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-05 14:42:47,392 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2025-02-05 14:42:47,392 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-05 14:42:47,393 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-05 14:42:47,393 INFO L85 PathProgramCache]: Analyzing trace with hash 164167315, now seen corresponding path program 1 times [2025-02-05 14:42:47,393 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-05 14:42:47,393 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1862392976] [2025-02-05 14:42:47,393 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-05 14:42:47,393 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-05 14:42:47,401 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 38 statements into 1 equivalence classes. [2025-02-05 14:42:47,405 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 38 of 38 statements. [2025-02-05 14:42:47,405 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-05 14:42:47,405 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 14:42:47,571 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2025-02-05 14:42:47,571 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-05 14:42:47,571 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1862392976] [2025-02-05 14:42:47,572 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1862392976] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-05 14:42:47,572 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1521774921] [2025-02-05 14:42:47,572 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-05 14:42:47,572 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 14:42:47,572 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-05 14:42:47,574 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-05 14:42:47,581 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2025-02-05 14:42:47,627 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 38 statements into 1 equivalence classes. [2025-02-05 14:42:47,647 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 38 of 38 statements. [2025-02-05 14:42:47,647 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-05 14:42:47,647 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 14:42:47,648 INFO L256 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 35 conjuncts are in the unsatisfiable core [2025-02-05 14:42:47,650 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-05 14:42:47,689 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2025-02-05 14:42:47,834 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 12 [2025-02-05 14:42:47,854 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 8 [2025-02-05 14:42:47,856 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 11 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-05 14:42:47,856 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-05 14:42:47,871 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 25 treesize of output 17 [2025-02-05 14:42:47,874 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 13 [2025-02-05 14:42:47,891 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2025-02-05 14:42:47,891 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1521774921] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-05 14:42:47,891 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-05 14:42:47,891 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11, 9] total 15 [2025-02-05 14:42:47,891 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [389548936] [2025-02-05 14:42:47,891 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-05 14:42:47,892 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2025-02-05 14:42:47,892 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-05 14:42:47,892 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2025-02-05 14:42:47,892 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=177, Unknown=0, NotChecked=0, Total=210 [2025-02-05 14:42:47,892 INFO L87 Difference]: Start difference. First operand 51 states and 63 transitions. Second operand has 15 states, 15 states have (on average 2.933333333333333) internal successors, (44), 15 states have internal predecessors, (44), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2025-02-05 14:42:48,089 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-05 14:42:48,089 INFO L93 Difference]: Finished difference Result 79 states and 95 transitions. [2025-02-05 14:42:48,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2025-02-05 14:42:48,090 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.933333333333333) internal successors, (44), 15 states have internal predecessors, (44), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 38 [2025-02-05 14:42:48,090 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-05 14:42:48,090 INFO L225 Difference]: With dead ends: 79 [2025-02-05 14:42:48,091 INFO L226 Difference]: Without dead ends: 75 [2025-02-05 14:42:48,091 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 70 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=65, Invalid=315, Unknown=0, NotChecked=0, Total=380 [2025-02-05 14:42:48,092 INFO L435 NwaCegarLoop]: 42 mSDtfsCounter, 38 mSDsluCounter, 341 mSDsCounter, 0 mSdLazyCounter, 181 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 383 SdHoareTripleChecker+Invalid, 182 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 181 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-02-05 14:42:48,092 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [39 Valid, 383 Invalid, 182 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 181 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-02-05 14:42:48,093 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2025-02-05 14:42:48,098 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 61. [2025-02-05 14:42:48,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 53 states have (on average 1.2452830188679245) internal successors, (66), 54 states have internal predecessors, (66), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 4 states have call predecessors, (5), 5 states have call successors, (5) [2025-02-05 14:42:48,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 76 transitions. [2025-02-05 14:42:48,099 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 76 transitions. Word has length 38 [2025-02-05 14:42:48,099 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-05 14:42:48,099 INFO L471 AbstractCegarLoop]: Abstraction has 61 states and 76 transitions. [2025-02-05 14:42:48,100 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.933333333333333) internal successors, (44), 15 states have internal predecessors, (44), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2025-02-05 14:42:48,100 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 76 transitions. [2025-02-05 14:42:48,100 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2025-02-05 14:42:48,100 INFO L210 NwaCegarLoop]: Found error trace [2025-02-05 14:42:48,100 INFO L218 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-05 14:42:48,108 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2025-02-05 14:42:48,305 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 [2025-02-05 14:42:48,305 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-05 14:42:48,306 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-05 14:42:48,306 INFO L85 PathProgramCache]: Analyzing trace with hash 795205691, now seen corresponding path program 2 times [2025-02-05 14:42:48,306 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-05 14:42:48,306 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1844225801] [2025-02-05 14:42:48,306 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-05 14:42:48,306 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-05 14:42:48,314 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 39 statements into 2 equivalence classes. [2025-02-05 14:42:48,325 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 39 of 39 statements. [2025-02-05 14:42:48,326 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-02-05 14:42:48,326 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 14:42:48,598 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2025-02-05 14:42:48,598 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-05 14:42:48,598 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1844225801] [2025-02-05 14:42:48,598 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1844225801] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-05 14:42:48,598 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1808085399] [2025-02-05 14:42:48,598 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-05 14:42:48,599 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 14:42:48,599 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-05 14:42:48,600 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-05 14:42:48,602 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2025-02-05 14:42:48,654 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 39 statements into 2 equivalence classes. [2025-02-05 14:42:48,676 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 39 of 39 statements. [2025-02-05 14:42:48,676 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-02-05 14:42:48,676 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 14:42:48,677 INFO L256 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 35 conjuncts are in the unsatisfiable core [2025-02-05 14:42:48,679 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-05 14:42:48,867 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2025-02-05 14:42:48,868 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-05 14:42:49,060 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2025-02-05 14:42:49,061 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1808085399] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-05 14:42:49,061 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-05 14:42:49,061 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 15] total 26 [2025-02-05 14:42:49,061 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1954689060] [2025-02-05 14:42:49,061 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-05 14:42:49,061 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2025-02-05 14:42:49,061 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-05 14:42:49,062 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2025-02-05 14:42:49,062 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=570, Unknown=0, NotChecked=0, Total=650 [2025-02-05 14:42:49,063 INFO L87 Difference]: Start difference. First operand 61 states and 76 transitions. Second operand has 26 states, 26 states have (on average 1.7692307692307692) internal successors, (46), 23 states have internal predecessors, (46), 2 states have call successors, (2), 1 states have call predecessors, (2), 3 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2025-02-05 14:42:49,374 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-05 14:42:49,374 INFO L93 Difference]: Finished difference Result 160 states and 219 transitions. [2025-02-05 14:42:49,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2025-02-05 14:42:49,376 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.7692307692307692) internal successors, (46), 23 states have internal predecessors, (46), 2 states have call successors, (2), 1 states have call predecessors, (2), 3 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) Word has length 39 [2025-02-05 14:42:49,376 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-05 14:42:49,377 INFO L225 Difference]: With dead ends: 160 [2025-02-05 14:42:49,377 INFO L226 Difference]: Without dead ends: 156 [2025-02-05 14:42:49,378 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 130 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=108, Invalid=822, Unknown=0, NotChecked=0, Total=930 [2025-02-05 14:42:49,378 INFO L435 NwaCegarLoop]: 29 mSDtfsCounter, 86 mSDsluCounter, 481 mSDsCounter, 0 mSdLazyCounter, 434 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 89 SdHoareTripleChecker+Valid, 510 SdHoareTripleChecker+Invalid, 453 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 434 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2025-02-05 14:42:49,381 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [89 Valid, 510 Invalid, 453 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 434 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2025-02-05 14:42:49,381 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2025-02-05 14:42:49,401 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 114. [2025-02-05 14:42:49,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 114 states, 100 states have (on average 1.27) internal successors, (127), 103 states have internal predecessors, (127), 9 states have call successors, (9), 2 states have call predecessors, (9), 4 states have return successors, (18), 8 states have call predecessors, (18), 9 states have call successors, (18) [2025-02-05 14:42:49,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 154 transitions. [2025-02-05 14:42:49,405 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 154 transitions. Word has length 39 [2025-02-05 14:42:49,405 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-05 14:42:49,405 INFO L471 AbstractCegarLoop]: Abstraction has 114 states and 154 transitions. [2025-02-05 14:42:49,405 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.7692307692307692) internal successors, (46), 23 states have internal predecessors, (46), 2 states have call successors, (2), 1 states have call predecessors, (2), 3 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2025-02-05 14:42:49,405 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 154 transitions. [2025-02-05 14:42:49,406 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2025-02-05 14:42:49,408 INFO L210 NwaCegarLoop]: Found error trace [2025-02-05 14:42:49,408 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-05 14:42:49,414 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2025-02-05 14:42:49,612 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 [2025-02-05 14:42:49,612 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-05 14:42:49,613 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-05 14:42:49,613 INFO L85 PathProgramCache]: Analyzing trace with hash -1117441133, now seen corresponding path program 3 times [2025-02-05 14:42:49,613 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-05 14:42:49,613 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [73425634] [2025-02-05 14:42:49,613 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-02-05 14:42:49,614 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-05 14:42:49,626 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 40 statements into 4 equivalence classes. [2025-02-05 14:42:49,649 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) and asserted 40 of 40 statements. [2025-02-05 14:42:49,650 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2025-02-05 14:42:49,650 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 14:42:50,104 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 3 proven. 11 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2025-02-05 14:42:50,104 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-05 14:42:50,104 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [73425634] [2025-02-05 14:42:50,104 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [73425634] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-05 14:42:50,104 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2139039069] [2025-02-05 14:42:50,105 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-02-05 14:42:50,105 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 14:42:50,105 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-05 14:42:50,108 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-05 14:42:50,109 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2025-02-05 14:42:50,160 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 40 statements into 4 equivalence classes. [2025-02-05 14:42:50,185 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) and asserted 40 of 40 statements. [2025-02-05 14:42:50,185 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2025-02-05 14:42:50,185 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 14:42:50,187 INFO L256 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 62 conjuncts are in the unsatisfiable core [2025-02-05 14:42:50,190 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-05 14:42:50,210 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 6 treesize of output 5 [2025-02-05 14:42:50,258 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2025-02-05 14:42:50,266 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2025-02-05 14:42:50,331 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2025-02-05 14:42:50,332 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2025-02-05 14:42:50,384 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 15 [2025-02-05 14:42:50,388 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 22 [2025-02-05 14:42:50,651 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 65 treesize of output 41 [2025-02-05 14:42:50,727 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 10 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-05 14:42:50,727 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-05 14:42:50,755 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 72 treesize of output 52 [2025-02-05 14:42:50,757 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 56 treesize of output 36 [2025-02-05 14:42:54,821 WARN L851 $PredicateComparison]: unable to prove that (and (forall ((|v_ULTIMATE.start_sll_create_~new_head~0#1.base_23| Int)) (or (not (= (select |c_#valid| |v_ULTIMATE.start_sll_create_~new_head~0#1.base_23|) 0)) (= (select (select (store |c_#memory_$Pointer$#1.base| |v_ULTIMATE.start_sll_create_~new_head~0#1.base_23| (store (select |c_#memory_$Pointer$#1.base| |v_ULTIMATE.start_sll_create_~new_head~0#1.base_23|) 0 |c_ULTIMATE.start_sll_create_~head~0#1.base|)) |c_ULTIMATE.start_sll_create_~head~0#1.base|) |c_ULTIMATE.start_sll_create_~head~0#1.offset|) 0))) (forall ((|v_ULTIMATE.start_sll_create_~new_head~0#1.base_23| Int)) (or (= (select (select (store |c_#memory_$Pointer$#1.offset| |v_ULTIMATE.start_sll_create_~new_head~0#1.base_23| (store (select |c_#memory_$Pointer$#1.offset| |v_ULTIMATE.start_sll_create_~new_head~0#1.base_23|) 0 |c_ULTIMATE.start_sll_create_~head~0#1.offset|)) |c_ULTIMATE.start_sll_create_~head~0#1.base|) |c_ULTIMATE.start_sll_create_~head~0#1.offset|) 0) (not (= (select |c_#valid| |v_ULTIMATE.start_sll_create_~new_head~0#1.base_23|) 0))))) is different from false [2025-02-05 14:42:55,063 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 3 proven. 7 refuted. 0 times theorem prover too weak. 7 trivial. 4 not checked. [2025-02-05 14:42:55,063 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2139039069] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-05 14:42:55,063 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-05 14:42:55,063 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13, 12] total 24 [2025-02-05 14:42:55,063 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1153681018] [2025-02-05 14:42:55,063 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-05 14:42:55,064 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2025-02-05 14:42:55,064 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-05 14:42:55,064 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2025-02-05 14:42:55,064 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=449, Unknown=1, NotChecked=42, Total=552 [2025-02-05 14:42:55,064 INFO L87 Difference]: Start difference. First operand 114 states and 154 transitions. Second operand has 24 states, 24 states have (on average 2.4166666666666665) internal successors, (58), 24 states have internal predecessors, (58), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2025-02-05 14:43:15,542 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-05 14:43:15,542 INFO L93 Difference]: Finished difference Result 178 states and 234 transitions. [2025-02-05 14:43:15,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2025-02-05 14:43:15,543 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.4166666666666665) internal successors, (58), 24 states have internal predecessors, (58), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 40 [2025-02-05 14:43:15,544 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-05 14:43:15,545 INFO L225 Difference]: With dead ends: 178 [2025-02-05 14:43:15,545 INFO L226 Difference]: Without dead ends: 170 [2025-02-05 14:43:15,546 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 67 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 121 ImplicationChecksByTransitivity, 24.6s TimeCoverageRelationStatistics Valid=87, Invalid=618, Unknown=1, NotChecked=50, Total=756 [2025-02-05 14:43:15,547 INFO L435 NwaCegarLoop]: 41 mSDtfsCounter, 33 mSDsluCounter, 602 mSDsCounter, 0 mSdLazyCounter, 351 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 643 SdHoareTripleChecker+Invalid, 406 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 351 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 52 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2025-02-05 14:43:15,547 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [34 Valid, 643 Invalid, 406 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 351 Invalid, 0 Unknown, 52 Unchecked, 0.3s Time] [2025-02-05 14:43:15,547 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2025-02-05 14:43:15,558 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 150. [2025-02-05 14:43:15,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 150 states, 130 states have (on average 1.2615384615384615) internal successors, (164), 136 states have internal predecessors, (164), 13 states have call successors, (13), 3 states have call predecessors, (13), 6 states have return successors, (26), 10 states have call predecessors, (26), 13 states have call successors, (26) [2025-02-05 14:43:15,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 203 transitions. [2025-02-05 14:43:15,560 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 203 transitions. Word has length 40 [2025-02-05 14:43:15,560 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-05 14:43:15,560 INFO L471 AbstractCegarLoop]: Abstraction has 150 states and 203 transitions. [2025-02-05 14:43:15,560 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.4166666666666665) internal successors, (58), 24 states have internal predecessors, (58), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2025-02-05 14:43:15,560 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 203 transitions. [2025-02-05 14:43:15,562 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2025-02-05 14:43:15,565 INFO L210 NwaCegarLoop]: Found error trace [2025-02-05 14:43:15,565 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-05 14:43:15,576 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2025-02-05 14:43:15,766 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 [2025-02-05 14:43:15,766 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-05 14:43:15,767 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-05 14:43:15,767 INFO L85 PathProgramCache]: Analyzing trace with hash -1254961077, now seen corresponding path program 1 times [2025-02-05 14:43:15,767 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-05 14:43:15,767 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1199133680] [2025-02-05 14:43:15,767 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-05 14:43:15,767 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-05 14:43:15,783 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 42 statements into 1 equivalence classes. [2025-02-05 14:43:15,791 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 42 of 42 statements. [2025-02-05 14:43:15,794 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-05 14:43:15,794 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 14:43:16,074 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2025-02-05 14:43:16,074 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-05 14:43:16,074 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1199133680] [2025-02-05 14:43:16,074 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1199133680] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-05 14:43:16,074 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1312288413] [2025-02-05 14:43:16,074 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-05 14:43:16,074 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 14:43:16,074 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-05 14:43:16,081 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-05 14:43:16,084 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2025-02-05 14:43:16,141 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 42 statements into 1 equivalence classes. [2025-02-05 14:43:16,167 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 42 of 42 statements. [2025-02-05 14:43:16,168 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-05 14:43:16,168 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 14:43:16,172 INFO L256 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 14 conjuncts are in the unsatisfiable core [2025-02-05 14:43:16,173 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-05 14:43:16,455 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2025-02-05 14:43:16,456 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-05 14:43:16,820 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2025-02-05 14:43:16,821 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1312288413] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-05 14:43:16,821 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-05 14:43:16,821 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 24 [2025-02-05 14:43:16,821 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [516316462] [2025-02-05 14:43:16,821 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-05 14:43:16,822 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2025-02-05 14:43:16,822 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-05 14:43:16,822 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2025-02-05 14:43:16,824 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=473, Unknown=0, NotChecked=0, Total=552 [2025-02-05 14:43:16,824 INFO L87 Difference]: Start difference. First operand 150 states and 203 transitions. Second operand has 24 states, 24 states have (on average 2.9166666666666665) internal successors, (70), 22 states have internal predecessors, (70), 3 states have call successors, (3), 1 states have call predecessors, (3), 6 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2025-02-05 14:43:17,140 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-05 14:43:17,141 INFO L93 Difference]: Finished difference Result 287 states and 402 transitions. [2025-02-05 14:43:17,141 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2025-02-05 14:43:17,141 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.9166666666666665) internal successors, (70), 22 states have internal predecessors, (70), 3 states have call successors, (3), 1 states have call predecessors, (3), 6 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) Word has length 42 [2025-02-05 14:43:17,142 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-05 14:43:17,144 INFO L225 Difference]: With dead ends: 287 [2025-02-05 14:43:17,144 INFO L226 Difference]: Without dead ends: 212 [2025-02-05 14:43:17,145 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 68 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 151 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=168, Invalid=762, Unknown=0, NotChecked=0, Total=930 [2025-02-05 14:43:17,145 INFO L435 NwaCegarLoop]: 36 mSDtfsCounter, 75 mSDsluCounter, 440 mSDsCounter, 0 mSdLazyCounter, 224 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 79 SdHoareTripleChecker+Valid, 476 SdHoareTripleChecker+Invalid, 249 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 224 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2025-02-05 14:43:17,145 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [79 Valid, 476 Invalid, 249 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 224 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2025-02-05 14:43:17,146 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 212 states. [2025-02-05 14:43:17,164 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 212 to 174. [2025-02-05 14:43:17,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 174 states, 151 states have (on average 1.2913907284768211) internal successors, (195), 159 states have internal predecessors, (195), 13 states have call successors, (13), 4 states have call predecessors, (13), 9 states have return successors, (32), 10 states have call predecessors, (32), 13 states have call successors, (32) [2025-02-05 14:43:17,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174 states to 174 states and 240 transitions. [2025-02-05 14:43:17,170 INFO L78 Accepts]: Start accepts. Automaton has 174 states and 240 transitions. Word has length 42 [2025-02-05 14:43:17,170 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-05 14:43:17,170 INFO L471 AbstractCegarLoop]: Abstraction has 174 states and 240 transitions. [2025-02-05 14:43:17,170 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.9166666666666665) internal successors, (70), 22 states have internal predecessors, (70), 3 states have call successors, (3), 1 states have call predecessors, (3), 6 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2025-02-05 14:43:17,170 INFO L276 IsEmpty]: Start isEmpty. Operand 174 states and 240 transitions. [2025-02-05 14:43:17,172 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2025-02-05 14:43:17,172 INFO L210 NwaCegarLoop]: Found error trace [2025-02-05 14:43:17,172 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-05 14:43:17,184 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2025-02-05 14:43:17,372 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 [2025-02-05 14:43:17,373 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-05 14:43:17,373 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-05 14:43:17,373 INFO L85 PathProgramCache]: Analyzing trace with hash -1548364084, now seen corresponding path program 1 times [2025-02-05 14:43:17,374 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-05 14:43:17,374 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1562401806] [2025-02-05 14:43:17,374 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-05 14:43:17,374 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-05 14:43:17,384 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 42 statements into 1 equivalence classes. [2025-02-05 14:43:17,391 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 42 of 42 statements. [2025-02-05 14:43:17,394 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-05 14:43:17,394 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 14:43:17,532 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 9 proven. 3 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2025-02-05 14:43:17,532 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-05 14:43:17,532 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1562401806] [2025-02-05 14:43:17,532 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1562401806] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-05 14:43:17,532 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [541414792] [2025-02-05 14:43:17,532 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-05 14:43:17,533 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 14:43:17,533 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-05 14:43:17,538 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-05 14:43:17,539 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2025-02-05 14:43:17,591 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 42 statements into 1 equivalence classes. [2025-02-05 14:43:17,608 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 42 of 42 statements. [2025-02-05 14:43:17,608 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-05 14:43:17,608 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 14:43:17,609 INFO L256 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 9 conjuncts are in the unsatisfiable core [2025-02-05 14:43:17,610 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-05 14:43:17,661 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2025-02-05 14:43:17,662 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-02-05 14:43:17,662 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [541414792] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-05 14:43:17,662 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2025-02-05 14:43:17,662 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7] total 11 [2025-02-05 14:43:17,662 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2013179073] [2025-02-05 14:43:17,662 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-05 14:43:17,662 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2025-02-05 14:43:17,662 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-05 14:43:17,663 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2025-02-05 14:43:17,663 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2025-02-05 14:43:17,663 INFO L87 Difference]: Start difference. First operand 174 states and 240 transitions. Second operand has 7 states, 7 states have (on average 4.571428571428571) internal successors, (32), 6 states have internal predecessors, (32), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2025-02-05 14:43:17,746 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-05 14:43:17,747 INFO L93 Difference]: Finished difference Result 203 states and 283 transitions. [2025-02-05 14:43:17,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2025-02-05 14:43:17,747 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.571428571428571) internal successors, (32), 6 states have internal predecessors, (32), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 42 [2025-02-05 14:43:17,747 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-05 14:43:17,749 INFO L225 Difference]: With dead ends: 203 [2025-02-05 14:43:17,751 INFO L226 Difference]: Without dead ends: 193 [2025-02-05 14:43:17,751 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2025-02-05 14:43:17,751 INFO L435 NwaCegarLoop]: 43 mSDtfsCounter, 13 mSDsluCounter, 183 mSDsCounter, 0 mSdLazyCounter, 87 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 226 SdHoareTripleChecker+Invalid, 87 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 87 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-02-05 14:43:17,752 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 226 Invalid, 87 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 87 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-02-05 14:43:17,752 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2025-02-05 14:43:17,771 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 178. [2025-02-05 14:43:17,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 178 states, 155 states have (on average 1.2838709677419355) internal successors, (199), 161 states have internal predecessors, (199), 13 states have call successors, (13), 4 states have call predecessors, (13), 9 states have return successors, (32), 12 states have call predecessors, (32), 13 states have call successors, (32) [2025-02-05 14:43:17,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 178 states to 178 states and 244 transitions. [2025-02-05 14:43:17,775 INFO L78 Accepts]: Start accepts. Automaton has 178 states and 244 transitions. Word has length 42 [2025-02-05 14:43:17,775 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-05 14:43:17,775 INFO L471 AbstractCegarLoop]: Abstraction has 178 states and 244 transitions. [2025-02-05 14:43:17,775 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.571428571428571) internal successors, (32), 6 states have internal predecessors, (32), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2025-02-05 14:43:17,776 INFO L276 IsEmpty]: Start isEmpty. Operand 178 states and 244 transitions. [2025-02-05 14:43:17,776 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2025-02-05 14:43:17,776 INFO L210 NwaCegarLoop]: Found error trace [2025-02-05 14:43:17,776 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-05 14:43:17,783 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2025-02-05 14:43:17,977 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 [2025-02-05 14:43:17,977 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-05 14:43:17,978 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-05 14:43:17,978 INFO L85 PathProgramCache]: Analyzing trace with hash -1344369715, now seen corresponding path program 2 times [2025-02-05 14:43:17,978 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-05 14:43:17,978 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1064584000] [2025-02-05 14:43:17,978 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-05 14:43:17,978 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-05 14:43:17,985 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 42 statements into 2 equivalence classes. [2025-02-05 14:43:17,993 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 42 of 42 statements. [2025-02-05 14:43:17,993 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-02-05 14:43:17,994 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 14:43:18,142 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2025-02-05 14:43:18,142 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-05 14:43:18,142 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1064584000] [2025-02-05 14:43:18,142 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1064584000] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-05 14:43:18,142 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1445851454] [2025-02-05 14:43:18,142 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-05 14:43:18,143 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 14:43:18,143 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-05 14:43:18,144 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-05 14:43:18,146 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2025-02-05 14:43:18,199 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 42 statements into 2 equivalence classes. [2025-02-05 14:43:18,218 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 42 of 42 statements. [2025-02-05 14:43:18,218 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-02-05 14:43:18,218 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 14:43:18,219 INFO L256 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 15 conjuncts are in the unsatisfiable core [2025-02-05 14:43:18,220 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-05 14:43:18,311 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 13 proven. 8 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-02-05 14:43:18,311 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-05 14:43:18,475 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 3 proven. 17 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2025-02-05 14:43:18,475 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1445851454] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-05 14:43:18,475 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-05 14:43:18,475 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 18 [2025-02-05 14:43:18,475 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1986774512] [2025-02-05 14:43:18,475 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-05 14:43:18,475 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2025-02-05 14:43:18,475 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-05 14:43:18,476 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2025-02-05 14:43:18,476 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=254, Unknown=0, NotChecked=0, Total=306 [2025-02-05 14:43:18,476 INFO L87 Difference]: Start difference. First operand 178 states and 244 transitions. Second operand has 18 states, 18 states have (on average 3.7222222222222223) internal successors, (67), 17 states have internal predecessors, (67), 2 states have call successors, (3), 2 states have call predecessors, (3), 5 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2025-02-05 14:43:18,683 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-05 14:43:18,683 INFO L93 Difference]: Finished difference Result 251 states and 344 transitions. [2025-02-05 14:43:18,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2025-02-05 14:43:18,684 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.7222222222222223) internal successors, (67), 17 states have internal predecessors, (67), 2 states have call successors, (3), 2 states have call predecessors, (3), 5 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 42 [2025-02-05 14:43:18,684 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-05 14:43:18,685 INFO L225 Difference]: With dead ends: 251 [2025-02-05 14:43:18,685 INFO L226 Difference]: Without dead ends: 178 [2025-02-05 14:43:18,686 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 74 SyntacticMatches, 5 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=93, Invalid=459, Unknown=0, NotChecked=0, Total=552 [2025-02-05 14:43:18,686 INFO L435 NwaCegarLoop]: 51 mSDtfsCounter, 28 mSDsluCounter, 436 mSDsCounter, 0 mSdLazyCounter, 213 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 487 SdHoareTripleChecker+Invalid, 219 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 213 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-02-05 14:43:18,686 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [28 Valid, 487 Invalid, 219 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 213 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-02-05 14:43:18,687 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2025-02-05 14:43:18,696 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 170. [2025-02-05 14:43:18,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 170 states, 148 states have (on average 1.2837837837837838) internal successors, (190), 154 states have internal predecessors, (190), 12 states have call successors, (12), 4 states have call predecessors, (12), 9 states have return successors, (29), 11 states have call predecessors, (29), 12 states have call successors, (29) [2025-02-05 14:43:18,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170 states to 170 states and 231 transitions. [2025-02-05 14:43:18,697 INFO L78 Accepts]: Start accepts. Automaton has 170 states and 231 transitions. Word has length 42 [2025-02-05 14:43:18,697 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-05 14:43:18,697 INFO L471 AbstractCegarLoop]: Abstraction has 170 states and 231 transitions. [2025-02-05 14:43:18,698 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 3.7222222222222223) internal successors, (67), 17 states have internal predecessors, (67), 2 states have call successors, (3), 2 states have call predecessors, (3), 5 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2025-02-05 14:43:18,698 INFO L276 IsEmpty]: Start isEmpty. Operand 170 states and 231 transitions. [2025-02-05 14:43:18,698 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2025-02-05 14:43:18,698 INFO L210 NwaCegarLoop]: Found error trace [2025-02-05 14:43:18,698 INFO L218 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-05 14:43:18,705 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2025-02-05 14:43:18,899 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 [2025-02-05 14:43:18,899 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-05 14:43:18,900 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-05 14:43:18,900 INFO L85 PathProgramCache]: Analyzing trace with hash 1373329655, now seen corresponding path program 4 times [2025-02-05 14:43:18,900 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-05 14:43:18,900 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2145555582] [2025-02-05 14:43:18,900 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-02-05 14:43:18,900 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-05 14:43:18,909 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 44 statements into 2 equivalence classes. [2025-02-05 14:43:18,923 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 44 of 44 statements. [2025-02-05 14:43:18,923 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-02-05 14:43:18,923 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 14:43:19,137 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 13 proven. 11 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2025-02-05 14:43:19,137 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-05 14:43:19,138 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2145555582] [2025-02-05 14:43:19,138 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2145555582] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-05 14:43:19,138 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1036302927] [2025-02-05 14:43:19,138 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-02-05 14:43:19,138 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 14:43:19,138 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-05 14:43:19,140 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-05 14:43:19,144 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2025-02-05 14:43:19,204 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 44 statements into 2 equivalence classes. [2025-02-05 14:43:19,231 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 44 of 44 statements. [2025-02-05 14:43:19,231 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-02-05 14:43:19,231 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 14:43:19,232 INFO L256 TraceCheckSpWp]: Trace formula consists of 257 conjuncts, 14 conjuncts are in the unsatisfiable core [2025-02-05 14:43:19,234 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-05 14:43:19,309 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 23 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-02-05 14:43:19,309 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-05 14:43:19,481 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 16 proven. 8 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2025-02-05 14:43:19,481 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1036302927] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-05 14:43:19,481 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-05 14:43:19,481 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 13 [2025-02-05 14:43:19,481 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [858555157] [2025-02-05 14:43:19,481 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-05 14:43:19,481 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2025-02-05 14:43:19,481 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-05 14:43:19,482 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2025-02-05 14:43:19,482 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2025-02-05 14:43:19,482 INFO L87 Difference]: Start difference. First operand 170 states and 231 transitions. Second operand has 13 states, 13 states have (on average 4.076923076923077) internal successors, (53), 12 states have internal predecessors, (53), 2 states have call successors, (3), 2 states have call predecessors, (3), 4 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2025-02-05 14:43:19,592 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-05 14:43:19,592 INFO L93 Difference]: Finished difference Result 263 states and 361 transitions. [2025-02-05 14:43:19,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2025-02-05 14:43:19,595 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.076923076923077) internal successors, (53), 12 states have internal predecessors, (53), 2 states have call successors, (3), 2 states have call predecessors, (3), 4 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 44 [2025-02-05 14:43:19,595 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-05 14:43:19,596 INFO L225 Difference]: With dead ends: 263 [2025-02-05 14:43:19,596 INFO L226 Difference]: Without dead ends: 163 [2025-02-05 14:43:19,597 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 81 SyntacticMatches, 4 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2025-02-05 14:43:19,598 INFO L435 NwaCegarLoop]: 35 mSDtfsCounter, 4 mSDsluCounter, 232 mSDsCounter, 0 mSdLazyCounter, 109 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 267 SdHoareTripleChecker+Invalid, 109 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 109 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-02-05 14:43:19,598 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 267 Invalid, 109 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 109 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-02-05 14:43:19,598 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2025-02-05 14:43:19,616 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 152. [2025-02-05 14:43:19,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 152 states, 133 states have (on average 1.2706766917293233) internal successors, (169), 137 states have internal predecessors, (169), 10 states have call successors, (10), 4 states have call predecessors, (10), 8 states have return successors, (22), 10 states have call predecessors, (22), 10 states have call successors, (22) [2025-02-05 14:43:19,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 201 transitions. [2025-02-05 14:43:19,619 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 201 transitions. Word has length 44 [2025-02-05 14:43:19,619 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-05 14:43:19,619 INFO L471 AbstractCegarLoop]: Abstraction has 152 states and 201 transitions. [2025-02-05 14:43:19,619 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 4.076923076923077) internal successors, (53), 12 states have internal predecessors, (53), 2 states have call successors, (3), 2 states have call predecessors, (3), 4 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2025-02-05 14:43:19,619 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 201 transitions. [2025-02-05 14:43:19,620 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2025-02-05 14:43:19,620 INFO L210 NwaCegarLoop]: Found error trace [2025-02-05 14:43:19,620 INFO L218 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-05 14:43:19,627 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2025-02-05 14:43:19,821 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 [2025-02-05 14:43:19,821 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-05 14:43:19,822 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-05 14:43:19,822 INFO L85 PathProgramCache]: Analyzing trace with hash -120057623, now seen corresponding path program 3 times [2025-02-05 14:43:19,823 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-05 14:43:19,823 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [259311735] [2025-02-05 14:43:19,823 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-02-05 14:43:19,823 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-05 14:43:19,830 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 46 statements into 5 equivalence classes. [2025-02-05 14:43:19,841 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) and asserted 46 of 46 statements. [2025-02-05 14:43:19,843 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2025-02-05 14:43:19,843 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 14:43:20,129 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 6 proven. 15 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2025-02-05 14:43:20,129 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-05 14:43:20,130 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [259311735] [2025-02-05 14:43:20,130 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [259311735] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-05 14:43:20,130 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [590204545] [2025-02-05 14:43:20,130 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-02-05 14:43:20,130 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 14:43:20,130 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-05 14:43:20,132 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-05 14:43:20,134 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2025-02-05 14:43:20,198 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 46 statements into 5 equivalence classes. [2025-02-05 14:43:20,230 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) and asserted 46 of 46 statements. [2025-02-05 14:43:20,230 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2025-02-05 14:43:20,230 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 14:43:20,232 INFO L256 TraceCheckSpWp]: Trace formula consists of 258 conjuncts, 54 conjuncts are in the unsatisfiable core [2025-02-05 14:43:20,234 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-05 14:43:20,286 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2025-02-05 14:43:20,368 INFO L349 Elim1Store]: treesize reduction 25, result has 43.2 percent of original size [2025-02-05 14:43:20,368 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 1 case distinctions, treesize of input 28 treesize of output 24 [2025-02-05 14:43:20,376 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2025-02-05 14:43:20,710 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 47 treesize of output 31 [2025-02-05 14:43:20,785 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 7 treesize of output 3 [2025-02-05 14:43:20,854 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-02-05 14:43:20,854 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 3 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 23 [2025-02-05 14:43:20,864 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 20 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-02-05 14:43:20,864 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-05 14:43:20,898 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 41 treesize of output 29 [2025-02-05 14:43:20,900 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 33 treesize of output 21 [2025-02-05 14:43:21,115 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 6 proven. 15 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2025-02-05 14:43:21,115 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [590204545] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-05 14:43:21,115 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-05 14:43:21,115 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14, 13] total 25 [2025-02-05 14:43:21,115 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1230098966] [2025-02-05 14:43:21,115 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-05 14:43:21,116 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2025-02-05 14:43:21,119 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-05 14:43:21,120 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2025-02-05 14:43:21,120 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=533, Unknown=0, NotChecked=0, Total=600 [2025-02-05 14:43:21,120 INFO L87 Difference]: Start difference. First operand 152 states and 201 transitions. Second operand has 25 states, 25 states have (on average 2.48) internal successors, (62), 25 states have internal predecessors, (62), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2025-02-05 14:43:22,028 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-05 14:43:22,028 INFO L93 Difference]: Finished difference Result 171 states and 221 transitions. [2025-02-05 14:43:22,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2025-02-05 14:43:22,029 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.48) internal successors, (62), 25 states have internal predecessors, (62), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 46 [2025-02-05 14:43:22,030 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-05 14:43:22,033 INFO L225 Difference]: With dead ends: 171 [2025-02-05 14:43:22,033 INFO L226 Difference]: Without dead ends: 167 [2025-02-05 14:43:22,038 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 81 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 160 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=148, Invalid=908, Unknown=0, NotChecked=0, Total=1056 [2025-02-05 14:43:22,038 INFO L435 NwaCegarLoop]: 57 mSDtfsCounter, 41 mSDsluCounter, 926 mSDsCounter, 0 mSdLazyCounter, 491 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 983 SdHoareTripleChecker+Invalid, 493 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 491 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2025-02-05 14:43:22,038 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [42 Valid, 983 Invalid, 493 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 491 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2025-02-05 14:43:22,039 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2025-02-05 14:43:22,058 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 153. [2025-02-05 14:43:22,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 153 states, 134 states have (on average 1.2686567164179106) internal successors, (170), 138 states have internal predecessors, (170), 10 states have call successors, (10), 4 states have call predecessors, (10), 8 states have return successors, (22), 10 states have call predecessors, (22), 10 states have call successors, (22) [2025-02-05 14:43:22,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 202 transitions. [2025-02-05 14:43:22,063 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 202 transitions. Word has length 46 [2025-02-05 14:43:22,063 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-05 14:43:22,063 INFO L471 AbstractCegarLoop]: Abstraction has 153 states and 202 transitions. [2025-02-05 14:43:22,063 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.48) internal successors, (62), 25 states have internal predecessors, (62), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2025-02-05 14:43:22,063 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 202 transitions. [2025-02-05 14:43:22,064 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2025-02-05 14:43:22,064 INFO L210 NwaCegarLoop]: Found error trace [2025-02-05 14:43:22,064 INFO L218 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-05 14:43:22,079 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2025-02-05 14:43:22,264 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 [2025-02-05 14:43:22,265 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-05 14:43:22,269 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-05 14:43:22,269 INFO L85 PathProgramCache]: Analyzing trace with hash 574167205, now seen corresponding path program 4 times [2025-02-05 14:43:22,269 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-05 14:43:22,269 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [653207086] [2025-02-05 14:43:22,269 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-02-05 14:43:22,269 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-05 14:43:22,284 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 47 statements into 2 equivalence classes. [2025-02-05 14:43:22,302 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 47 of 47 statements. [2025-02-05 14:43:22,302 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-02-05 14:43:22,302 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 14:43:22,692 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2025-02-05 14:43:22,693 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-05 14:43:22,693 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [653207086] [2025-02-05 14:43:22,693 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [653207086] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-05 14:43:22,693 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1807395681] [2025-02-05 14:43:22,693 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-02-05 14:43:22,693 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 14:43:22,696 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-05 14:43:22,697 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-05 14:43:22,699 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2025-02-05 14:43:22,777 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 47 statements into 2 equivalence classes. [2025-02-05 14:43:22,806 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 47 of 47 statements. [2025-02-05 14:43:22,807 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-02-05 14:43:22,807 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 14:43:22,808 INFO L256 TraceCheckSpWp]: Trace formula consists of 265 conjuncts, 39 conjuncts are in the unsatisfiable core [2025-02-05 14:43:22,812 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-05 14:43:23,020 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2025-02-05 14:43:23,020 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-05 14:43:23,293 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2025-02-05 14:43:23,293 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1807395681] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-05 14:43:23,293 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-05 14:43:23,293 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 17] total 31 [2025-02-05 14:43:23,293 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1659662696] [2025-02-05 14:43:23,293 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-05 14:43:23,295 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2025-02-05 14:43:23,295 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-05 14:43:23,296 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2025-02-05 14:43:23,296 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=835, Unknown=0, NotChecked=0, Total=930 [2025-02-05 14:43:23,296 INFO L87 Difference]: Start difference. First operand 153 states and 202 transitions. Second operand has 31 states, 31 states have (on average 1.8387096774193548) internal successors, (57), 28 states have internal predecessors, (57), 2 states have call successors, (2), 1 states have call predecessors, (2), 4 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2025-02-05 14:43:23,963 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-05 14:43:23,963 INFO L93 Difference]: Finished difference Result 270 states and 381 transitions. [2025-02-05 14:43:23,964 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2025-02-05 14:43:23,964 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.8387096774193548) internal successors, (57), 28 states have internal predecessors, (57), 2 states have call successors, (2), 1 states have call predecessors, (2), 4 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) Word has length 47 [2025-02-05 14:43:23,965 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-05 14:43:23,967 INFO L225 Difference]: With dead ends: 270 [2025-02-05 14:43:23,969 INFO L226 Difference]: Without dead ends: 266 [2025-02-05 14:43:23,970 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 81 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 220 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=152, Invalid=1408, Unknown=0, NotChecked=0, Total=1560 [2025-02-05 14:43:23,971 INFO L435 NwaCegarLoop]: 60 mSDtfsCounter, 129 mSDsluCounter, 1026 mSDsCounter, 0 mSdLazyCounter, 804 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 134 SdHoareTripleChecker+Valid, 1086 SdHoareTripleChecker+Invalid, 831 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 804 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2025-02-05 14:43:23,971 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [134 Valid, 1086 Invalid, 831 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 804 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2025-02-05 14:43:23,975 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 266 states. [2025-02-05 14:43:24,003 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 266 to 200. [2025-02-05 14:43:24,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 200 states, 176 states have (on average 1.2556818181818181) internal successors, (221), 181 states have internal predecessors, (221), 14 states have call successors, (14), 4 states have call predecessors, (14), 9 states have return successors, (25), 14 states have call predecessors, (25), 14 states have call successors, (25) [2025-02-05 14:43:24,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 200 states to 200 states and 260 transitions. [2025-02-05 14:43:24,007 INFO L78 Accepts]: Start accepts. Automaton has 200 states and 260 transitions. Word has length 47 [2025-02-05 14:43:24,007 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-05 14:43:24,008 INFO L471 AbstractCegarLoop]: Abstraction has 200 states and 260 transitions. [2025-02-05 14:43:24,009 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 1.8387096774193548) internal successors, (57), 28 states have internal predecessors, (57), 2 states have call successors, (2), 1 states have call predecessors, (2), 4 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2025-02-05 14:43:24,009 INFO L276 IsEmpty]: Start isEmpty. Operand 200 states and 260 transitions. [2025-02-05 14:43:24,009 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2025-02-05 14:43:24,009 INFO L210 NwaCegarLoop]: Found error trace [2025-02-05 14:43:24,009 INFO L218 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-05 14:43:24,023 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2025-02-05 14:43:24,213 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 [2025-02-05 14:43:24,213 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-05 14:43:24,214 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-05 14:43:24,214 INFO L85 PathProgramCache]: Analyzing trace with hash 620300393, now seen corresponding path program 5 times [2025-02-05 14:43:24,214 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-05 14:43:24,214 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1402443738] [2025-02-05 14:43:24,214 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-02-05 14:43:24,214 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-05 14:43:24,246 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 48 statements into 5 equivalence classes. [2025-02-05 14:43:24,268 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) and asserted 48 of 48 statements. [2025-02-05 14:43:24,272 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2025-02-05 14:43:24,272 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 14:43:25,072 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2025-02-05 14:43:25,073 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-05 14:43:25,073 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1402443738] [2025-02-05 14:43:25,073 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1402443738] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-05 14:43:25,073 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [996184446] [2025-02-05 14:43:25,073 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-02-05 14:43:25,073 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 14:43:25,073 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-05 14:43:25,075 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-05 14:43:25,078 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2025-02-05 14:43:25,149 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 48 statements into 5 equivalence classes. [2025-02-05 14:43:25,188 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) and asserted 48 of 48 statements. [2025-02-05 14:43:25,188 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2025-02-05 14:43:25,188 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 14:43:25,191 INFO L256 TraceCheckSpWp]: Trace formula consists of 272 conjuncts, 81 conjuncts are in the unsatisfiable core [2025-02-05 14:43:25,193 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-05 14:43:25,204 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 6 treesize of output 5 [2025-02-05 14:43:25,219 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2025-02-05 14:43:25,227 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2025-02-05 14:43:25,280 INFO L349 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2025-02-05 14:43:25,280 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2025-02-05 14:43:25,351 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 15 [2025-02-05 14:43:25,356 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 22 [2025-02-05 14:43:25,429 INFO L349 Elim1Store]: treesize reduction 8, result has 61.9 percent of original size [2025-02-05 14:43:25,429 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 20 treesize of output 22 [2025-02-05 14:43:25,524 INFO L349 Elim1Store]: treesize reduction 41, result has 14.6 percent of original size [2025-02-05 14:43:25,524 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 74 treesize of output 44 [2025-02-05 14:43:25,528 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 40 [2025-02-05 14:43:26,105 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 164 treesize of output 120 [2025-02-05 14:43:26,110 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 124 treesize of output 88 [2025-02-05 14:43:26,409 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 14 proven. 24 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-02-05 14:43:26,409 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-05 14:43:26,620 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 136 treesize of output 100 [2025-02-05 14:43:26,623 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 104 treesize of output 68 [2025-02-05 14:43:27,848 INFO L173 IndexEqualityManager]: detected equality via solver [2025-02-05 14:43:27,850 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 7180 treesize of output 6668 [2025-02-05 14:43:27,859 INFO L173 IndexEqualityManager]: detected equality via solver [2025-02-05 14:43:27,881 INFO L173 IndexEqualityManager]: detected equality via solver [2025-02-05 14:43:27,883 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 1046 treesize of output 982 [2025-02-05 14:43:27,889 INFO L173 IndexEqualityManager]: detected equality via solver [2025-02-05 14:43:28,230 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 4 proven. 24 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2025-02-05 14:43:28,231 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [996184446] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-05 14:43:28,231 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-05 14:43:28,231 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 15] total 39 [2025-02-05 14:43:28,231 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1632320426] [2025-02-05 14:43:28,231 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-05 14:43:28,231 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2025-02-05 14:43:28,231 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-05 14:43:28,232 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2025-02-05 14:43:28,232 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=1372, Unknown=0, NotChecked=0, Total=1482 [2025-02-05 14:43:28,232 INFO L87 Difference]: Start difference. First operand 200 states and 260 transitions. Second operand has 39 states, 39 states have (on average 2.1025641025641026) internal successors, (82), 39 states have internal predecessors, (82), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2025-02-05 14:43:29,392 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-05 14:43:29,393 INFO L93 Difference]: Finished difference Result 268 states and 344 transitions. [2025-02-05 14:43:29,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2025-02-05 14:43:29,393 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.1025641025641026) internal successors, (82), 39 states have internal predecessors, (82), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 48 [2025-02-05 14:43:29,394 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-05 14:43:29,395 INFO L225 Difference]: With dead ends: 268 [2025-02-05 14:43:29,395 INFO L226 Difference]: Without dead ends: 259 [2025-02-05 14:43:29,395 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 72 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 416 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=153, Invalid=1739, Unknown=0, NotChecked=0, Total=1892 [2025-02-05 14:43:29,396 INFO L435 NwaCegarLoop]: 61 mSDtfsCounter, 57 mSDsluCounter, 1433 mSDsCounter, 0 mSdLazyCounter, 829 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 1494 SdHoareTripleChecker+Invalid, 833 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 829 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2025-02-05 14:43:29,396 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [58 Valid, 1494 Invalid, 833 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 829 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2025-02-05 14:43:29,396 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 259 states. [2025-02-05 14:43:29,434 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 259 to 239. [2025-02-05 14:43:29,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 239 states, 209 states have (on average 1.2488038277511961) internal successors, (261), 216 states have internal predecessors, (261), 18 states have call successors, (18), 5 states have call predecessors, (18), 11 states have return successors, (33), 17 states have call predecessors, (33), 18 states have call successors, (33) [2025-02-05 14:43:29,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 239 states to 239 states and 312 transitions. [2025-02-05 14:43:29,436 INFO L78 Accepts]: Start accepts. Automaton has 239 states and 312 transitions. Word has length 48 [2025-02-05 14:43:29,436 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-05 14:43:29,436 INFO L471 AbstractCegarLoop]: Abstraction has 239 states and 312 transitions. [2025-02-05 14:43:29,436 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 2.1025641025641026) internal successors, (82), 39 states have internal predecessors, (82), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2025-02-05 14:43:29,436 INFO L276 IsEmpty]: Start isEmpty. Operand 239 states and 312 transitions. [2025-02-05 14:43:29,438 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2025-02-05 14:43:29,438 INFO L210 NwaCegarLoop]: Found error trace [2025-02-05 14:43:29,438 INFO L218 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-05 14:43:29,452 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2025-02-05 14:43:29,639 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 [2025-02-05 14:43:29,643 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-05 14:43:29,643 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-05 14:43:29,643 INFO L85 PathProgramCache]: Analyzing trace with hash -270659017, now seen corresponding path program 6 times [2025-02-05 14:43:29,643 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-05 14:43:29,643 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [621492876] [2025-02-05 14:43:29,643 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-02-05 14:43:29,643 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-05 14:43:29,656 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 50 statements into 5 equivalence classes. [2025-02-05 14:43:29,674 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) and asserted 50 of 50 statements. [2025-02-05 14:43:29,674 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2025-02-05 14:43:29,674 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 14:43:29,874 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 3 proven. 36 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2025-02-05 14:43:29,874 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-05 14:43:29,874 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [621492876] [2025-02-05 14:43:29,874 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [621492876] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-05 14:43:29,874 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1720988238] [2025-02-05 14:43:29,874 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-02-05 14:43:29,874 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 14:43:29,874 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-05 14:43:29,877 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-05 14:43:29,878 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2025-02-05 14:43:29,944 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 50 statements into 5 equivalence classes. [2025-02-05 14:43:29,992 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) and asserted 50 of 50 statements. [2025-02-05 14:43:29,992 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2025-02-05 14:43:29,992 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 14:43:29,995 INFO L256 TraceCheckSpWp]: Trace formula consists of 273 conjuncts, 18 conjuncts are in the unsatisfiable core [2025-02-05 14:43:29,996 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-05 14:43:30,090 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 22 proven. 18 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-02-05 14:43:30,091 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-05 14:43:30,281 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 9 proven. 30 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2025-02-05 14:43:30,281 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1720988238] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-05 14:43:30,281 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-05 14:43:30,281 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 12] total 21 [2025-02-05 14:43:30,281 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [784635037] [2025-02-05 14:43:30,281 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-05 14:43:30,282 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2025-02-05 14:43:30,282 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-05 14:43:30,282 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2025-02-05 14:43:30,282 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=349, Unknown=0, NotChecked=0, Total=420 [2025-02-05 14:43:30,282 INFO L87 Difference]: Start difference. First operand 239 states and 312 transitions. Second operand has 21 states, 21 states have (on average 3.619047619047619) internal successors, (76), 20 states have internal predecessors, (76), 2 states have call successors, (3), 2 states have call predecessors, (3), 5 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2025-02-05 14:43:30,557 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-05 14:43:30,557 INFO L93 Difference]: Finished difference Result 316 states and 423 transitions. [2025-02-05 14:43:30,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2025-02-05 14:43:30,557 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.619047619047619) internal successors, (76), 20 states have internal predecessors, (76), 2 states have call successors, (3), 2 states have call predecessors, (3), 5 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 50 [2025-02-05 14:43:30,558 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-05 14:43:30,559 INFO L225 Difference]: With dead ends: 316 [2025-02-05 14:43:30,560 INFO L226 Difference]: Without dead ends: 258 [2025-02-05 14:43:30,563 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 90 SyntacticMatches, 6 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 155 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=129, Invalid=627, Unknown=0, NotChecked=0, Total=756 [2025-02-05 14:43:30,563 INFO L435 NwaCegarLoop]: 57 mSDtfsCounter, 32 mSDsluCounter, 497 mSDsCounter, 0 mSdLazyCounter, 277 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 554 SdHoareTripleChecker+Invalid, 287 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 277 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2025-02-05 14:43:30,563 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [32 Valid, 554 Invalid, 287 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 277 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2025-02-05 14:43:30,564 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 258 states. [2025-02-05 14:43:30,582 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 258 to 230. [2025-02-05 14:43:30,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 230 states, 201 states have (on average 1.2487562189054726) internal successors, (251), 208 states have internal predecessors, (251), 17 states have call successors, (17), 5 states have call predecessors, (17), 11 states have return successors, (31), 16 states have call predecessors, (31), 17 states have call successors, (31) [2025-02-05 14:43:30,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 230 states to 230 states and 299 transitions. [2025-02-05 14:43:30,584 INFO L78 Accepts]: Start accepts. Automaton has 230 states and 299 transitions. Word has length 50 [2025-02-05 14:43:30,585 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-05 14:43:30,585 INFO L471 AbstractCegarLoop]: Abstraction has 230 states and 299 transitions. [2025-02-05 14:43:30,585 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 3.619047619047619) internal successors, (76), 20 states have internal predecessors, (76), 2 states have call successors, (3), 2 states have call predecessors, (3), 5 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2025-02-05 14:43:30,585 INFO L276 IsEmpty]: Start isEmpty. Operand 230 states and 299 transitions. [2025-02-05 14:43:30,586 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2025-02-05 14:43:30,586 INFO L210 NwaCegarLoop]: Found error trace [2025-02-05 14:43:30,586 INFO L218 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-05 14:43:30,597 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2025-02-05 14:43:30,786 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 [2025-02-05 14:43:30,786 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-05 14:43:30,787 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-05 14:43:30,787 INFO L85 PathProgramCache]: Analyzing trace with hash 1965639813, now seen corresponding path program 7 times [2025-02-05 14:43:30,787 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-05 14:43:30,787 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [50577909] [2025-02-05 14:43:30,787 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-02-05 14:43:30,787 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-05 14:43:30,796 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 52 statements into 1 equivalence classes. [2025-02-05 14:43:30,800 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 52 of 52 statements. [2025-02-05 14:43:30,800 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-05 14:43:30,800 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 14:43:30,937 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 29 proven. 15 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2025-02-05 14:43:30,938 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-05 14:43:30,938 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [50577909] [2025-02-05 14:43:30,938 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [50577909] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-05 14:43:30,938 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [249144605] [2025-02-05 14:43:30,938 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-02-05 14:43:30,938 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 14:43:30,938 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-05 14:43:30,940 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-05 14:43:30,942 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2025-02-05 14:43:31,020 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 52 statements into 1 equivalence classes. [2025-02-05 14:43:31,044 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 52 of 52 statements. [2025-02-05 14:43:31,044 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-05 14:43:31,045 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 14:43:31,046 INFO L256 TraceCheckSpWp]: Trace formula consists of 306 conjuncts, 17 conjuncts are in the unsatisfiable core [2025-02-05 14:43:31,047 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-05 14:43:31,121 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 39 proven. 6 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2025-02-05 14:43:31,122 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-05 14:43:31,298 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 29 proven. 15 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2025-02-05 14:43:31,298 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [249144605] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-05 14:43:31,298 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-05 14:43:31,298 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 17 [2025-02-05 14:43:31,298 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [703699122] [2025-02-05 14:43:31,298 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-05 14:43:31,299 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2025-02-05 14:43:31,299 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-05 14:43:31,299 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2025-02-05 14:43:31,299 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=220, Unknown=0, NotChecked=0, Total=272 [2025-02-05 14:43:31,300 INFO L87 Difference]: Start difference. First operand 230 states and 299 transitions. Second operand has 17 states, 17 states have (on average 4.0588235294117645) internal successors, (69), 16 states have internal predecessors, (69), 2 states have call successors, (3), 2 states have call predecessors, (3), 5 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2025-02-05 14:43:31,490 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-05 14:43:31,490 INFO L93 Difference]: Finished difference Result 333 states and 445 transitions. [2025-02-05 14:43:31,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2025-02-05 14:43:31,491 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 4.0588235294117645) internal successors, (69), 16 states have internal predecessors, (69), 2 states have call successors, (3), 2 states have call predecessors, (3), 5 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 52 [2025-02-05 14:43:31,491 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-05 14:43:31,492 INFO L225 Difference]: With dead ends: 333 [2025-02-05 14:43:31,492 INFO L226 Difference]: Without dead ends: 247 [2025-02-05 14:43:31,493 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 96 SyntacticMatches, 5 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=90, Invalid=372, Unknown=0, NotChecked=0, Total=462 [2025-02-05 14:43:31,493 INFO L435 NwaCegarLoop]: 43 mSDtfsCounter, 28 mSDsluCounter, 330 mSDsCounter, 0 mSdLazyCounter, 163 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 373 SdHoareTripleChecker+Invalid, 167 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 163 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-02-05 14:43:31,493 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [28 Valid, 373 Invalid, 167 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 163 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-02-05 14:43:31,494 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 247 states. [2025-02-05 14:43:31,509 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 247 to 219. [2025-02-05 14:43:31,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 219 states, 192 states have (on average 1.2447916666666667) internal successors, (239), 198 states have internal predecessors, (239), 15 states have call successors, (15), 5 states have call predecessors, (15), 11 states have return successors, (27), 15 states have call predecessors, (27), 15 states have call successors, (27) [2025-02-05 14:43:31,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 219 states to 219 states and 281 transitions. [2025-02-05 14:43:31,511 INFO L78 Accepts]: Start accepts. Automaton has 219 states and 281 transitions. Word has length 52 [2025-02-05 14:43:31,511 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-05 14:43:31,511 INFO L471 AbstractCegarLoop]: Abstraction has 219 states and 281 transitions. [2025-02-05 14:43:31,511 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 4.0588235294117645) internal successors, (69), 16 states have internal predecessors, (69), 2 states have call successors, (3), 2 states have call predecessors, (3), 5 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2025-02-05 14:43:31,511 INFO L276 IsEmpty]: Start isEmpty. Operand 219 states and 281 transitions. [2025-02-05 14:43:31,512 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2025-02-05 14:43:31,512 INFO L210 NwaCegarLoop]: Found error trace [2025-02-05 14:43:31,512 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-05 14:43:31,520 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2025-02-05 14:43:31,715 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 [2025-02-05 14:43:31,716 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-05 14:43:31,716 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-05 14:43:31,717 INFO L85 PathProgramCache]: Analyzing trace with hash 375700016, now seen corresponding path program 1 times [2025-02-05 14:43:31,717 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-05 14:43:31,717 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [706035423] [2025-02-05 14:43:31,717 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-05 14:43:31,717 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-05 14:43:31,726 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 54 statements into 1 equivalence classes. [2025-02-05 14:43:31,729 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 54 of 54 statements. [2025-02-05 14:43:31,730 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-05 14:43:31,730 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 14:43:31,789 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2025-02-05 14:43:31,790 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-05 14:43:31,790 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [706035423] [2025-02-05 14:43:31,790 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [706035423] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-05 14:43:31,790 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [772288794] [2025-02-05 14:43:31,790 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-05 14:43:31,790 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 14:43:31,790 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-05 14:43:31,792 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-05 14:43:31,795 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2025-02-05 14:43:31,872 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 54 statements into 1 equivalence classes. [2025-02-05 14:43:31,895 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 54 of 54 statements. [2025-02-05 14:43:31,895 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-05 14:43:31,895 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 14:43:31,897 INFO L256 TraceCheckSpWp]: Trace formula consists of 298 conjuncts, 8 conjuncts are in the unsatisfiable core [2025-02-05 14:43:31,898 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-05 14:43:31,942 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 21 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2025-02-05 14:43:31,942 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-02-05 14:43:31,942 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [772288794] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-05 14:43:31,942 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2025-02-05 14:43:31,942 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 10 [2025-02-05 14:43:31,942 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1822713059] [2025-02-05 14:43:31,942 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-05 14:43:31,942 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2025-02-05 14:43:31,942 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-05 14:43:31,943 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2025-02-05 14:43:31,943 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2025-02-05 14:43:31,943 INFO L87 Difference]: Start difference. First operand 219 states and 281 transitions. Second operand has 6 states, 6 states have (on average 7.166666666666667) internal successors, (43), 5 states have internal predecessors, (43), 2 states have call successors, (3), 2 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2025-02-05 14:43:32,016 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-05 14:43:32,017 INFO L93 Difference]: Finished difference Result 305 states and 389 transitions. [2025-02-05 14:43:32,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2025-02-05 14:43:32,018 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 7.166666666666667) internal successors, (43), 5 states have internal predecessors, (43), 2 states have call successors, (3), 2 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 54 [2025-02-05 14:43:32,018 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-05 14:43:32,019 INFO L225 Difference]: With dead ends: 305 [2025-02-05 14:43:32,019 INFO L226 Difference]: Without dead ends: 174 [2025-02-05 14:43:32,019 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2025-02-05 14:43:32,019 INFO L435 NwaCegarLoop]: 34 mSDtfsCounter, 1 mSDsluCounter, 124 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 158 SdHoareTripleChecker+Invalid, 51 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 51 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-02-05 14:43:32,020 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 158 Invalid, 51 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 51 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-02-05 14:43:32,020 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174 states. [2025-02-05 14:43:32,034 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174 to 164. [2025-02-05 14:43:32,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 164 states, 144 states have (on average 1.2083333333333333) internal successors, (174), 149 states have internal predecessors, (174), 9 states have call successors, (9), 5 states have call predecessors, (9), 10 states have return successors, (15), 9 states have call predecessors, (15), 9 states have call successors, (15) [2025-02-05 14:43:32,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 198 transitions. [2025-02-05 14:43:32,036 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 198 transitions. Word has length 54 [2025-02-05 14:43:32,036 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-05 14:43:32,036 INFO L471 AbstractCegarLoop]: Abstraction has 164 states and 198 transitions. [2025-02-05 14:43:32,036 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 7.166666666666667) internal successors, (43), 5 states have internal predecessors, (43), 2 states have call successors, (3), 2 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2025-02-05 14:43:32,037 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 198 transitions. [2025-02-05 14:43:32,037 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2025-02-05 14:43:32,037 INFO L210 NwaCegarLoop]: Found error trace [2025-02-05 14:43:32,037 INFO L218 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-05 14:43:32,044 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2025-02-05 14:43:32,238 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 [2025-02-05 14:43:32,238 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-05 14:43:32,238 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-05 14:43:32,238 INFO L85 PathProgramCache]: Analyzing trace with hash -910408293, now seen corresponding path program 8 times [2025-02-05 14:43:32,238 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-05 14:43:32,238 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1408996578] [2025-02-05 14:43:32,238 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-05 14:43:32,238 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-05 14:43:32,248 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 54 statements into 2 equivalence classes. [2025-02-05 14:43:32,254 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 54 of 54 statements. [2025-02-05 14:43:32,254 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-02-05 14:43:32,254 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 14:43:32,772 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 12 proven. 26 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2025-02-05 14:43:32,773 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-05 14:43:32,773 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1408996578] [2025-02-05 14:43:32,773 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1408996578] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-05 14:43:32,773 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1267951482] [2025-02-05 14:43:32,773 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-05 14:43:32,773 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 14:43:32,773 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-05 14:43:32,776 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-05 14:43:32,781 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2025-02-05 14:43:32,869 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 54 statements into 2 equivalence classes. [2025-02-05 14:43:32,900 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 54 of 54 statements. [2025-02-05 14:43:32,901 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-02-05 14:43:32,901 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 14:43:32,903 INFO L256 TraceCheckSpWp]: Trace formula consists of 307 conjuncts, 75 conjuncts are in the unsatisfiable core [2025-02-05 14:43:32,905 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-05 14:43:32,917 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 6 treesize of output 5 [2025-02-05 14:43:32,932 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2025-02-05 14:43:32,957 INFO L349 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2025-02-05 14:43:32,957 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2025-02-05 14:43:33,022 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 28 treesize of output 16 [2025-02-05 14:43:33,027 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2025-02-05 14:43:33,090 INFO L349 Elim1Store]: treesize reduction 8, result has 61.9 percent of original size [2025-02-05 14:43:33,090 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 20 treesize of output 22 [2025-02-05 14:43:33,150 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 22 [2025-02-05 14:43:33,172 INFO L349 Elim1Store]: treesize reduction 41, result has 14.6 percent of original size [2025-02-05 14:43:33,173 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 60 treesize of output 38 [2025-02-05 14:43:33,557 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 142 treesize of output 102 [2025-02-05 14:43:33,560 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 106 treesize of output 74 [2025-02-05 14:43:33,681 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2025-02-05 14:43:33,760 INFO L349 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2025-02-05 14:43:33,760 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 68 treesize of output 26 [2025-02-05 14:43:33,763 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 21 proven. 30 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2025-02-05 14:43:33,763 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-05 14:43:33,783 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 73 treesize of output 53 [2025-02-05 14:43:33,785 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 57 treesize of output 37 [2025-02-05 14:43:34,436 INFO L173 IndexEqualityManager]: detected equality via solver [2025-02-05 14:43:34,528 INFO L173 IndexEqualityManager]: detected equality via solver [2025-02-05 14:43:34,751 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 8 proven. 30 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2025-02-05 14:43:34,751 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1267951482] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-05 14:43:34,751 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-05 14:43:34,751 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17, 16] total 31 [2025-02-05 14:43:34,751 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [468149965] [2025-02-05 14:43:34,751 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-05 14:43:34,751 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2025-02-05 14:43:34,751 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-05 14:43:34,752 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2025-02-05 14:43:34,752 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=850, Unknown=0, NotChecked=0, Total=930 [2025-02-05 14:43:34,752 INFO L87 Difference]: Start difference. First operand 164 states and 198 transitions. Second operand has 31 states, 31 states have (on average 2.3225806451612905) internal successors, (72), 31 states have internal predecessors, (72), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2025-02-05 14:43:35,701 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-05 14:43:35,701 INFO L93 Difference]: Finished difference Result 183 states and 218 transitions. [2025-02-05 14:43:35,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2025-02-05 14:43:35,702 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.3225806451612905) internal successors, (72), 31 states have internal predecessors, (72), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 54 [2025-02-05 14:43:35,702 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-05 14:43:35,703 INFO L225 Difference]: With dead ends: 183 [2025-02-05 14:43:35,703 INFO L226 Difference]: Without dead ends: 179 [2025-02-05 14:43:35,703 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 95 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 299 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=200, Invalid=1522, Unknown=0, NotChecked=0, Total=1722 [2025-02-05 14:43:35,704 INFO L435 NwaCegarLoop]: 59 mSDtfsCounter, 64 mSDsluCounter, 1026 mSDsCounter, 0 mSdLazyCounter, 659 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 1085 SdHoareTripleChecker+Invalid, 663 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 659 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2025-02-05 14:43:35,704 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [65 Valid, 1085 Invalid, 663 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 659 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2025-02-05 14:43:35,704 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2025-02-05 14:43:35,732 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 165. [2025-02-05 14:43:35,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 165 states, 145 states have (on average 1.206896551724138) internal successors, (175), 150 states have internal predecessors, (175), 9 states have call successors, (9), 5 states have call predecessors, (9), 10 states have return successors, (15), 9 states have call predecessors, (15), 9 states have call successors, (15) [2025-02-05 14:43:35,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 199 transitions. [2025-02-05 14:43:35,737 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 199 transitions. Word has length 54 [2025-02-05 14:43:35,737 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-05 14:43:35,737 INFO L471 AbstractCegarLoop]: Abstraction has 165 states and 199 transitions. [2025-02-05 14:43:35,737 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 2.3225806451612905) internal successors, (72), 31 states have internal predecessors, (72), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2025-02-05 14:43:35,737 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 199 transitions. [2025-02-05 14:43:35,737 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2025-02-05 14:43:35,737 INFO L210 NwaCegarLoop]: Found error trace [2025-02-05 14:43:35,737 INFO L218 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 4, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-05 14:43:35,747 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2025-02-05 14:43:35,938 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 [2025-02-05 14:43:35,938 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-05 14:43:35,939 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-05 14:43:35,939 INFO L85 PathProgramCache]: Analyzing trace with hash 1843100211, now seen corresponding path program 9 times [2025-02-05 14:43:35,939 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-05 14:43:35,939 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [10206722] [2025-02-05 14:43:35,939 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-02-05 14:43:35,939 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-05 14:43:35,951 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 55 statements into 6 equivalence classes. [2025-02-05 14:43:35,957 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) and asserted 47 of 55 statements. [2025-02-05 14:43:35,957 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2025-02-05 14:43:35,957 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 14:43:36,339 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 1 proven. 30 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2025-02-05 14:43:36,340 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-05 14:43:36,340 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [10206722] [2025-02-05 14:43:36,340 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [10206722] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-05 14:43:36,340 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2029014885] [2025-02-05 14:43:36,340 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-02-05 14:43:36,340 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 14:43:36,340 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-05 14:43:36,351 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-05 14:43:36,352 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2025-02-05 14:43:36,543 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 55 statements into 6 equivalence classes. [2025-02-05 14:43:36,581 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) and asserted 47 of 55 statements. [2025-02-05 14:43:36,581 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2025-02-05 14:43:36,581 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 14:43:36,582 INFO L256 TraceCheckSpWp]: Trace formula consists of 246 conjuncts, 43 conjuncts are in the unsatisfiable core [2025-02-05 14:43:36,587 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-05 14:43:36,927 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2025-02-05 14:43:36,927 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-05 14:43:37,483 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2025-02-05 14:43:37,483 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2029014885] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-05 14:43:37,483 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-05 14:43:37,483 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 18, 19] total 45 [2025-02-05 14:43:37,484 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [979283137] [2025-02-05 14:43:37,484 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-05 14:43:37,484 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2025-02-05 14:43:37,484 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-05 14:43:37,484 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2025-02-05 14:43:37,485 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=1840, Unknown=0, NotChecked=0, Total=1980 [2025-02-05 14:43:37,485 INFO L87 Difference]: Start difference. First operand 165 states and 199 transitions. Second operand has 45 states, 45 states have (on average 1.8) internal successors, (81), 42 states have internal predecessors, (81), 2 states have call successors, (2), 1 states have call predecessors, (2), 5 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2025-02-05 14:43:38,952 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-05 14:43:38,953 INFO L93 Difference]: Finished difference Result 420 states and 532 transitions. [2025-02-05 14:43:38,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2025-02-05 14:43:38,953 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 1.8) internal successors, (81), 42 states have internal predecessors, (81), 2 states have call successors, (2), 1 states have call predecessors, (2), 5 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) Word has length 55 [2025-02-05 14:43:38,954 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-05 14:43:38,955 INFO L225 Difference]: With dead ends: 420 [2025-02-05 14:43:38,955 INFO L226 Difference]: Without dead ends: 290 [2025-02-05 14:43:38,956 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 87 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 762 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=378, Invalid=3912, Unknown=0, NotChecked=0, Total=4290 [2025-02-05 14:43:38,956 INFO L435 NwaCegarLoop]: 67 mSDtfsCounter, 248 mSDsluCounter, 1564 mSDsCounter, 0 mSdLazyCounter, 1267 mSolverCounterSat, 90 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 251 SdHoareTripleChecker+Valid, 1631 SdHoareTripleChecker+Invalid, 1357 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 90 IncrementalHoareTripleChecker+Valid, 1267 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2025-02-05 14:43:38,956 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [251 Valid, 1631 Invalid, 1357 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [90 Valid, 1267 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2025-02-05 14:43:38,957 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 290 states. [2025-02-05 14:43:38,970 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 290 to 198. [2025-02-05 14:43:38,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 198 states, 176 states have (on average 1.1875) internal successors, (209), 181 states have internal predecessors, (209), 10 states have call successors, (10), 5 states have call predecessors, (10), 11 states have return successors, (18), 11 states have call predecessors, (18), 10 states have call successors, (18) [2025-02-05 14:43:38,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 198 states to 198 states and 237 transitions. [2025-02-05 14:43:38,971 INFO L78 Accepts]: Start accepts. Automaton has 198 states and 237 transitions. Word has length 55 [2025-02-05 14:43:38,971 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-05 14:43:38,971 INFO L471 AbstractCegarLoop]: Abstraction has 198 states and 237 transitions. [2025-02-05 14:43:38,972 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 1.8) internal successors, (81), 42 states have internal predecessors, (81), 2 states have call successors, (2), 1 states have call predecessors, (2), 5 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2025-02-05 14:43:38,972 INFO L276 IsEmpty]: Start isEmpty. Operand 198 states and 237 transitions. [2025-02-05 14:43:38,972 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2025-02-05 14:43:38,972 INFO L210 NwaCegarLoop]: Found error trace [2025-02-05 14:43:38,972 INFO L218 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-05 14:43:38,979 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2025-02-05 14:43:39,173 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 [2025-02-05 14:43:39,173 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-05 14:43:39,173 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-05 14:43:39,174 INFO L85 PathProgramCache]: Analyzing trace with hash -1995919489, now seen corresponding path program 1 times [2025-02-05 14:43:39,174 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-05 14:43:39,174 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2033409902] [2025-02-05 14:43:39,174 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-05 14:43:39,175 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-05 14:43:39,183 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 57 statements into 1 equivalence classes. [2025-02-05 14:43:39,189 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 57 of 57 statements. [2025-02-05 14:43:39,189 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-05 14:43:39,189 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 14:43:39,261 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2025-02-05 14:43:39,261 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-05 14:43:39,261 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2033409902] [2025-02-05 14:43:39,261 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2033409902] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-05 14:43:39,261 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-05 14:43:39,261 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2025-02-05 14:43:39,262 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [260353218] [2025-02-05 14:43:39,262 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-05 14:43:39,262 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-02-05 14:43:39,262 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-05 14:43:39,263 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-02-05 14:43:39,263 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2025-02-05 14:43:39,263 INFO L87 Difference]: Start difference. First operand 198 states and 237 transitions. Second operand has 5 states, 5 states have (on average 6.6) internal successors, (33), 5 states have internal predecessors, (33), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2025-02-05 14:43:39,336 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-05 14:43:39,336 INFO L93 Difference]: Finished difference Result 208 states and 247 transitions. [2025-02-05 14:43:39,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2025-02-05 14:43:39,336 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 6.6) internal successors, (33), 5 states have internal predecessors, (33), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 57 [2025-02-05 14:43:39,336 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-05 14:43:39,337 INFO L225 Difference]: With dead ends: 208 [2025-02-05 14:43:39,337 INFO L226 Difference]: Without dead ends: 204 [2025-02-05 14:43:39,338 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2025-02-05 14:43:39,339 INFO L435 NwaCegarLoop]: 48 mSDtfsCounter, 17 mSDsluCounter, 108 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 156 SdHoareTripleChecker+Invalid, 54 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 54 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-02-05 14:43:39,339 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 156 Invalid, 54 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 54 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-02-05 14:43:39,339 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 204 states. [2025-02-05 14:43:39,354 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 204 to 188. [2025-02-05 14:43:39,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 188 states, 167 states have (on average 1.1796407185628743) internal successors, (197), 172 states have internal predecessors, (197), 9 states have call successors, (9), 5 states have call predecessors, (9), 11 states have return successors, (17), 10 states have call predecessors, (17), 9 states have call successors, (17) [2025-02-05 14:43:39,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 188 states to 188 states and 223 transitions. [2025-02-05 14:43:39,355 INFO L78 Accepts]: Start accepts. Automaton has 188 states and 223 transitions. Word has length 57 [2025-02-05 14:43:39,355 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-05 14:43:39,355 INFO L471 AbstractCegarLoop]: Abstraction has 188 states and 223 transitions. [2025-02-05 14:43:39,355 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.6) internal successors, (33), 5 states have internal predecessors, (33), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2025-02-05 14:43:39,355 INFO L276 IsEmpty]: Start isEmpty. Operand 188 states and 223 transitions. [2025-02-05 14:43:39,356 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2025-02-05 14:43:39,356 INFO L210 NwaCegarLoop]: Found error trace [2025-02-05 14:43:39,356 INFO L218 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-05 14:43:39,356 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2025-02-05 14:43:39,356 INFO L396 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-05 14:43:39,356 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-05 14:43:39,356 INFO L85 PathProgramCache]: Analyzing trace with hash 1302517915, now seen corresponding path program 10 times [2025-02-05 14:43:39,356 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-05 14:43:39,356 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1944603482] [2025-02-05 14:43:39,356 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-02-05 14:43:39,356 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-05 14:43:39,365 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 56 statements into 2 equivalence classes. [2025-02-05 14:43:39,380 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 56 of 56 statements. [2025-02-05 14:43:39,380 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-02-05 14:43:39,380 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 14:43:40,488 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 0 proven. 47 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2025-02-05 14:43:40,489 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-05 14:43:40,489 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1944603482] [2025-02-05 14:43:40,489 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1944603482] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-05 14:43:40,489 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [711527596] [2025-02-05 14:43:40,489 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-02-05 14:43:40,489 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 14:43:40,489 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-05 14:43:40,492 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-05 14:43:40,493 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2025-02-05 14:43:40,578 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 56 statements into 2 equivalence classes. [2025-02-05 14:43:40,628 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 56 of 56 statements. [2025-02-05 14:43:40,628 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-02-05 14:43:40,628 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 14:43:40,635 INFO L256 TraceCheckSpWp]: Trace formula consists of 321 conjuncts, 104 conjuncts are in the unsatisfiable core [2025-02-05 14:43:40,637 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-05 14:43:40,654 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 6 treesize of output 5 [2025-02-05 14:43:40,665 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2025-02-05 14:43:40,674 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2025-02-05 14:43:40,699 INFO L349 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2025-02-05 14:43:40,699 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2025-02-05 14:43:40,772 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 15 [2025-02-05 14:43:40,782 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 22 [2025-02-05 14:43:40,877 INFO L349 Elim1Store]: treesize reduction 48, result has 36.0 percent of original size [2025-02-05 14:43:40,878 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 26 treesize of output 41 [2025-02-05 14:43:40,998 INFO L349 Elim1Store]: treesize reduction 33, result has 17.5 percent of original size [2025-02-05 14:43:40,999 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 87 treesize of output 49 [2025-02-05 14:43:41,009 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 40 [2025-02-05 14:43:41,094 INFO L190 IndexEqualityManager]: detected not equals via solver [2025-02-05 14:43:41,108 INFO L349 Elim1Store]: treesize reduction 12, result has 67.6 percent of original size [2025-02-05 14:43:41,108 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 37 [2025-02-05 14:43:41,224 INFO L349 Elim1Store]: treesize reduction 72, result has 17.2 percent of original size [2025-02-05 14:43:41,225 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 5 case distinctions, treesize of input 141 treesize of output 69 [2025-02-05 14:43:41,236 INFO L190 IndexEqualityManager]: detected not equals via solver [2025-02-05 14:43:41,237 INFO L190 IndexEqualityManager]: detected not equals via solver [2025-02-05 14:43:41,237 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 57 treesize of output 62 [2025-02-05 14:43:41,817 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 183 treesize of output 135 [2025-02-05 14:43:42,160 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 18 proven. 42 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2025-02-05 14:43:42,160 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-05 14:43:42,379 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 264 treesize of output 196 [2025-02-05 14:43:42,384 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 200 treesize of output 132