./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/recursified_nla-digbench/recursified_cohendiv-ll.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 551b0097 Calling Ultimate with: /root/.sdkman/candidates/java/21.0.5-tem/bin/java -Dosgi.configuration.area=/storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.6.800.v20240513-1750.jar -data @noDefault -ultimatedata /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/recursified_nla-digbench/recursified_cohendiv-ll.c -s /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 7c6261a52ba91bad3864c182e4633afd262bc5fe07cf18f92cb66db83623b9ae --- Real Ultimate output --- This is Ultimate 0.3.0-?-551b009-m [2025-01-09 04:10:52,279 INFO L188 SettingsManager]: Resetting all preferences to default values... [2025-01-09 04:10:52,360 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2025-01-09 04:10:52,367 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2025-01-09 04:10:52,367 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2025-01-09 04:10:52,394 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2025-01-09 04:10:52,395 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2025-01-09 04:10:52,395 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2025-01-09 04:10:52,396 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2025-01-09 04:10:52,396 INFO L153 SettingsManager]: * Use memory slicer=true [2025-01-09 04:10:52,396 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2025-01-09 04:10:52,397 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2025-01-09 04:10:52,397 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2025-01-09 04:10:52,397 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2025-01-09 04:10:52,397 INFO L153 SettingsManager]: * Use SBE=true [2025-01-09 04:10:52,398 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2025-01-09 04:10:52,398 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2025-01-09 04:10:52,398 INFO L153 SettingsManager]: * sizeof long=4 [2025-01-09 04:10:52,398 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2025-01-09 04:10:52,398 INFO L153 SettingsManager]: * sizeof POINTER=4 [2025-01-09 04:10:52,399 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2025-01-09 04:10:52,399 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2025-01-09 04:10:52,399 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2025-01-09 04:10:52,399 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2025-01-09 04:10:52,399 INFO L153 SettingsManager]: * sizeof long double=12 [2025-01-09 04:10:52,399 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2025-01-09 04:10:52,399 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2025-01-09 04:10:52,399 INFO L153 SettingsManager]: * Use constant arrays=true [2025-01-09 04:10:52,399 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2025-01-09 04:10:52,400 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2025-01-09 04:10:52,400 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2025-01-09 04:10:52,400 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2025-01-09 04:10:52,400 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-01-09 04:10:52,400 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2025-01-09 04:10:52,401 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2025-01-09 04:10:52,401 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2025-01-09 04:10:52,401 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2025-01-09 04:10:52,401 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-01-09 04:10:52,401 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2025-01-09 04:10:52,401 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2025-01-09 04:10:52,401 INFO L153 SettingsManager]: * Compute procedure contracts=false [2025-01-09 04:10:52,401 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2025-01-09 04:10:52,401 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2025-01-09 04:10:52,402 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2025-01-09 04:10:52,402 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2025-01-09 04:10:52,402 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2025-01-09 04:10:52,402 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2025-01-09 04:10:52,402 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2025-01-09 04:10:52,402 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 -> 7c6261a52ba91bad3864c182e4633afd262bc5fe07cf18f92cb66db83623b9ae [2025-01-09 04:10:52,662 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2025-01-09 04:10:52,672 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2025-01-09 04:10:52,674 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2025-01-09 04:10:52,678 INFO L270 PluginConnector]: Initializing CDTParser... [2025-01-09 04:10:52,678 INFO L274 PluginConnector]: CDTParser initialized [2025-01-09 04:10:52,679 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/recursified_nla-digbench/recursified_cohendiv-ll.c [2025-01-09 04:10:53,992 INFO L533 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/6a562fde6/b6973c96a6a84a99b3ac3d5bcf6d0b4c/FLAGfb7cf1abc [2025-01-09 04:10:54,265 INFO L384 CDTParser]: Found 1 translation units. [2025-01-09 04:10:54,287 INFO L180 CDTParser]: Scanning /storage/repos/ultimate-jdk21/releaseScripts/default/sv-benchmarks/c/recursified_nla-digbench/recursified_cohendiv-ll.c [2025-01-09 04:10:54,304 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/6a562fde6/b6973c96a6a84a99b3ac3d5bcf6d0b4c/FLAGfb7cf1abc [2025-01-09 04:10:54,325 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/6a562fde6/b6973c96a6a84a99b3ac3d5bcf6d0b4c [2025-01-09 04:10:54,329 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2025-01-09 04:10:54,330 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2025-01-09 04:10:54,331 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2025-01-09 04:10:54,332 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2025-01-09 04:10:54,336 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2025-01-09 04:10:54,337 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.01 04:10:54" (1/1) ... [2025-01-09 04:10:54,337 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@438f0176 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 04:10:54, skipping insertion in model container [2025-01-09 04:10:54,337 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.01 04:10:54" (1/1) ... [2025-01-09 04:10:54,351 INFO L175 MainTranslator]: Built tables and reachable declarations [2025-01-09 04:10:54,480 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/recursified_nla-digbench/recursified_cohendiv-ll.c[1136,1149] [2025-01-09 04:10:54,505 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-01-09 04:10:54,514 INFO L200 MainTranslator]: Completed pre-run [2025-01-09 04:10:54,523 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/recursified_nla-digbench/recursified_cohendiv-ll.c[1136,1149] [2025-01-09 04:10:54,533 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-01-09 04:10:54,545 INFO L204 MainTranslator]: Completed translation [2025-01-09 04:10:54,547 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 04:10:54 WrapperNode [2025-01-09 04:10:54,548 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2025-01-09 04:10:54,548 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2025-01-09 04:10:54,548 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2025-01-09 04:10:54,548 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2025-01-09 04:10:54,554 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 04:10:54" (1/1) ... [2025-01-09 04:10:54,560 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 04:10:54" (1/1) ... [2025-01-09 04:10:54,572 INFO L138 Inliner]: procedures = 17, calls = 84, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 71 [2025-01-09 04:10:54,573 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2025-01-09 04:10:54,573 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2025-01-09 04:10:54,573 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2025-01-09 04:10:54,573 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2025-01-09 04:10:54,580 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 04:10:54" (1/1) ... [2025-01-09 04:10:54,580 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 04:10:54" (1/1) ... [2025-01-09 04:10:54,582 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 04:10:54" (1/1) ... [2025-01-09 04:10:54,605 INFO L175 MemorySlicer]: Split 49 memory accesses to 7 slices as follows [2, 6, 8, 10, 8, 10, 5]. 20 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0, 0, 0, 0, 0, 0]. The 12 writes are split as follows [0, 2, 3, 2, 3, 1, 1]. [2025-01-09 04:10:54,605 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 04:10:54" (1/1) ... [2025-01-09 04:10:54,605 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 04:10:54" (1/1) ... [2025-01-09 04:10:54,611 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 04:10:54" (1/1) ... [2025-01-09 04:10:54,611 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 04:10:54" (1/1) ... [2025-01-09 04:10:54,613 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 04:10:54" (1/1) ... [2025-01-09 04:10:54,614 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 04:10:54" (1/1) ... [2025-01-09 04:10:54,615 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 04:10:54" (1/1) ... [2025-01-09 04:10:54,617 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2025-01-09 04:10:54,618 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2025-01-09 04:10:54,618 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2025-01-09 04:10:54,618 INFO L274 PluginConnector]: RCFGBuilder initialized [2025-01-09 04:10:54,619 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 04:10:54" (1/1) ... [2025-01-09 04:10:54,623 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-01-09 04:10:54,636 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-09 04:10:54,649 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2025-01-09 04:10:54,652 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2025-01-09 04:10:54,668 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2025-01-09 04:10:54,668 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2025-01-09 04:10:54,669 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2025-01-09 04:10:54,669 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2025-01-09 04:10:54,669 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2025-01-09 04:10:54,669 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#4 [2025-01-09 04:10:54,669 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#5 [2025-01-09 04:10:54,669 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#6 [2025-01-09 04:10:54,670 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2025-01-09 04:10:54,670 INFO L130 BoogieDeclarations]: Found specification of procedure func_to_recursive_line_41_to_52_0 [2025-01-09 04:10:54,670 INFO L138 BoogieDeclarations]: Found implementation of procedure func_to_recursive_line_41_to_52_0 [2025-01-09 04:10:54,670 INFO L130 BoogieDeclarations]: Found specification of procedure func_to_recursive_line_32_to_55_0 [2025-01-09 04:10:54,670 INFO L138 BoogieDeclarations]: Found implementation of procedure func_to_recursive_line_32_to_55_0 [2025-01-09 04:10:54,670 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2025-01-09 04:10:54,670 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2025-01-09 04:10:54,670 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2025-01-09 04:10:54,671 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2025-01-09 04:10:54,671 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#4 [2025-01-09 04:10:54,671 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#5 [2025-01-09 04:10:54,671 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#6 [2025-01-09 04:10:54,671 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2025-01-09 04:10:54,671 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2025-01-09 04:10:54,671 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2025-01-09 04:10:54,671 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2025-01-09 04:10:54,671 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2025-01-09 04:10:54,671 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#3 [2025-01-09 04:10:54,671 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#4 [2025-01-09 04:10:54,672 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#5 [2025-01-09 04:10:54,672 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#6 [2025-01-09 04:10:54,672 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2025-01-09 04:10:54,672 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2025-01-09 04:10:54,672 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2025-01-09 04:10:54,772 INFO L234 CfgBuilder]: Building ICFG [2025-01-09 04:10:54,774 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2025-01-09 04:10:55,035 INFO L? ?]: Removed 11 outVars from TransFormulas that were not future-live. [2025-01-09 04:10:55,036 INFO L283 CfgBuilder]: Performing block encoding [2025-01-09 04:10:55,044 INFO L307 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2025-01-09 04:10:55,045 INFO L312 CfgBuilder]: Removed 2 assume(true) statements. [2025-01-09 04:10:55,046 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.01 04:10:55 BoogieIcfgContainer [2025-01-09 04:10:55,046 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2025-01-09 04:10:55,048 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2025-01-09 04:10:55,048 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2025-01-09 04:10:55,053 INFO L274 PluginConnector]: TraceAbstraction initialized [2025-01-09 04:10:55,054 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.01 04:10:54" (1/3) ... [2025-01-09 04:10:55,054 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@cfbeeda and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.01 04:10:55, skipping insertion in model container [2025-01-09 04:10:55,055 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 04:10:54" (2/3) ... [2025-01-09 04:10:55,056 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@cfbeeda and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.01 04:10:55, skipping insertion in model container [2025-01-09 04:10:55,056 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.01 04:10:55" (3/3) ... [2025-01-09 04:10:55,057 INFO L128 eAbstractionObserver]: Analyzing ICFG recursified_cohendiv-ll.c [2025-01-09 04:10:55,070 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2025-01-09 04:10:55,071 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG recursified_cohendiv-ll.c that has 4 procedures, 43 locations, 1 initial locations, 0 loop locations, and 1 error locations. [2025-01-09 04:10:55,110 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2025-01-09 04:10:55,120 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;@40994782, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2025-01-09 04:10:55,120 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2025-01-09 04:10:55,125 INFO L276 IsEmpty]: Start isEmpty. Operand has 43 states, 27 states have (on average 1.2592592592592593) internal successors, (34), 30 states have internal predecessors, (34), 11 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2025-01-09 04:10:55,129 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2025-01-09 04:10:55,130 INFO L210 NwaCegarLoop]: Found error trace [2025-01-09 04:10:55,130 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-01-09 04:10:55,130 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-01-09 04:10:55,134 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-09 04:10:55,134 INFO L85 PathProgramCache]: Analyzing trace with hash 389886345, now seen corresponding path program 1 times [2025-01-09 04:10:55,141 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-09 04:10:55,144 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [144825798] [2025-01-09 04:10:55,144 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-09 04:10:55,145 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-09 04:10:55,227 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 11 statements into 1 equivalence classes. [2025-01-09 04:10:55,259 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 11 of 11 statements. [2025-01-09 04:10:55,259 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-09 04:10:55,259 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 04:10:55,344 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-01-09 04:10:55,345 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-09 04:10:55,345 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [144825798] [2025-01-09 04:10:55,345 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [144825798] provided 1 perfect and 0 imperfect interpolant sequences [2025-01-09 04:10:55,345 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-01-09 04:10:55,345 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2025-01-09 04:10:55,347 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [57777496] [2025-01-09 04:10:55,347 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-01-09 04:10:55,349 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2025-01-09 04:10:55,350 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-09 04:10:55,363 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2025-01-09 04:10:55,364 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2025-01-09 04:10:55,365 INFO L87 Difference]: Start difference. First operand has 43 states, 27 states have (on average 1.2592592592592593) internal successors, (34), 30 states have internal predecessors, (34), 11 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) Second operand has 2 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 1 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-09 04:10:55,386 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-01-09 04:10:55,387 INFO L93 Difference]: Finished difference Result 83 states and 119 transitions. [2025-01-09 04:10:55,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2025-01-09 04:10:55,389 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 1 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2025-01-09 04:10:55,390 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-01-09 04:10:55,394 INFO L225 Difference]: With dead ends: 83 [2025-01-09 04:10:55,395 INFO L226 Difference]: Without dead ends: 39 [2025-01-09 04:10:55,397 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2025-01-09 04:10:55,400 INFO L435 NwaCegarLoop]: 52 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, 52 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-01-09 04:10:55,400 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 52 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-01-09 04:10:55,411 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2025-01-09 04:10:55,422 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2025-01-09 04:10:55,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 24 states have (on average 1.125) internal successors, (27), 27 states have internal predecessors, (27), 11 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2025-01-09 04:10:55,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 48 transitions. [2025-01-09 04:10:55,431 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 48 transitions. Word has length 11 [2025-01-09 04:10:55,431 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-01-09 04:10:55,431 INFO L471 AbstractCegarLoop]: Abstraction has 39 states and 48 transitions. [2025-01-09 04:10:55,431 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 1 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-09 04:10:55,431 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 48 transitions. [2025-01-09 04:10:55,433 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2025-01-09 04:10:55,433 INFO L210 NwaCegarLoop]: Found error trace [2025-01-09 04:10:55,433 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-01-09 04:10:55,434 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2025-01-09 04:10:55,434 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-01-09 04:10:55,434 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-09 04:10:55,434 INFO L85 PathProgramCache]: Analyzing trace with hash 1069944715, now seen corresponding path program 1 times [2025-01-09 04:10:55,435 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-09 04:10:55,435 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [511232717] [2025-01-09 04:10:55,435 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-09 04:10:55,435 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-09 04:10:55,463 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 11 statements into 1 equivalence classes. [2025-01-09 04:10:55,521 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 11 of 11 statements. [2025-01-09 04:10:55,521 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-09 04:10:55,521 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unknown [2025-01-09 04:10:55,527 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [668680876] [2025-01-09 04:10:55,529 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-09 04:10:55,530 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-09 04:10:55,530 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-09 04:10:55,533 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-01-09 04:10:55,535 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2025-01-09 04:10:55,619 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 11 statements into 1 equivalence classes. [2025-01-09 04:10:55,672 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 11 of 11 statements. [2025-01-09 04:10:55,673 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-09 04:10:55,673 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 04:10:55,676 INFO L256 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 33 conjuncts are in the unsatisfiable core [2025-01-09 04:10:55,683 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-09 04:10:55,727 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2025-01-09 04:10:55,740 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2025-01-09 04:10:55,891 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-01-09 04:10:55,891 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-01-09 04:10:55,891 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-09 04:10:55,891 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [511232717] [2025-01-09 04:10:55,892 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2025-01-09 04:10:55,892 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [668680876] [2025-01-09 04:10:55,892 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [668680876] provided 1 perfect and 0 imperfect interpolant sequences [2025-01-09 04:10:55,892 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-01-09 04:10:55,892 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2025-01-09 04:10:55,893 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [293085590] [2025-01-09 04:10:55,893 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-01-09 04:10:55,893 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2025-01-09 04:10:55,893 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-09 04:10:55,895 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2025-01-09 04:10:55,895 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2025-01-09 04:10:55,895 INFO L87 Difference]: Start difference. First operand 39 states and 48 transitions. Second operand has 8 states, 6 states have (on average 1.5) internal successors, (9), 6 states have internal predecessors, (9), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-09 04:10:56,063 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-01-09 04:10:56,063 INFO L93 Difference]: Finished difference Result 56 states and 67 transitions. [2025-01-09 04:10:56,064 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2025-01-09 04:10:56,064 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 6 states have (on average 1.5) internal successors, (9), 6 states have internal predecessors, (9), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2025-01-09 04:10:56,065 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-01-09 04:10:56,066 INFO L225 Difference]: With dead ends: 56 [2025-01-09 04:10:56,066 INFO L226 Difference]: Without dead ends: 54 [2025-01-09 04:10:56,066 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2025-01-09 04:10:56,067 INFO L435 NwaCegarLoop]: 41 mSDtfsCounter, 15 mSDsluCounter, 208 mSDsCounter, 0 mSdLazyCounter, 85 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 249 SdHoareTripleChecker+Invalid, 91 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 85 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-01-09 04:10:56,067 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 249 Invalid, 91 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 85 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-01-09 04:10:56,069 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2025-01-09 04:10:56,079 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 52. [2025-01-09 04:10:56,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 33 states have (on average 1.121212121212121) internal successors, (37), 36 states have internal predecessors, (37), 13 states have call successors, (13), 5 states have call predecessors, (13), 5 states have return successors, (13), 12 states have call predecessors, (13), 12 states have call successors, (13) [2025-01-09 04:10:56,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 63 transitions. [2025-01-09 04:10:56,084 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 63 transitions. Word has length 11 [2025-01-09 04:10:56,085 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-01-09 04:10:56,085 INFO L471 AbstractCegarLoop]: Abstraction has 52 states and 63 transitions. [2025-01-09 04:10:56,085 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 6 states have (on average 1.5) internal successors, (9), 6 states have internal predecessors, (9), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-09 04:10:56,085 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 63 transitions. [2025-01-09 04:10:56,085 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2025-01-09 04:10:56,085 INFO L210 NwaCegarLoop]: Found error trace [2025-01-09 04:10:56,085 INFO L218 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-01-09 04:10:56,097 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2025-01-09 04:10:56,286 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-09 04:10:56,286 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-01-09 04:10:56,287 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-09 04:10:56,287 INFO L85 PathProgramCache]: Analyzing trace with hash -1882485824, now seen corresponding path program 1 times [2025-01-09 04:10:56,287 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-09 04:10:56,287 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [521688348] [2025-01-09 04:10:56,287 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-09 04:10:56,287 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-09 04:10:56,301 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 17 statements into 1 equivalence classes. [2025-01-09 04:10:56,342 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 17 of 17 statements. [2025-01-09 04:10:56,342 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-09 04:10:56,342 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unknown [2025-01-09 04:10:56,344 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2005811672] [2025-01-09 04:10:56,344 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-09 04:10:56,344 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-09 04:10:56,344 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-09 04:10:56,348 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-01-09 04:10:56,349 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2025-01-09 04:10:56,417 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 17 statements into 1 equivalence classes. [2025-01-09 04:10:56,450 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 17 of 17 statements. [2025-01-09 04:10:56,450 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-09 04:10:56,450 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 04:10:56,452 INFO L256 TraceCheckSpWp]: Trace formula consists of 206 conjuncts, 45 conjuncts are in the unsatisfiable core [2025-01-09 04:10:56,456 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-09 04:10:56,462 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2025-01-09 04:10:56,467 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2025-01-09 04:10:56,474 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2025-01-09 04:10:56,634 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2025-01-09 04:10:56,638 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2025-01-09 04:10:56,678 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-01-09 04:10:56,679 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-01-09 04:10:56,791 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-01-09 04:10:56,792 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-09 04:10:56,792 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [521688348] [2025-01-09 04:10:56,792 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2025-01-09 04:10:56,792 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2005811672] [2025-01-09 04:10:56,792 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2005811672] provided 1 perfect and 1 imperfect interpolant sequences [2025-01-09 04:10:56,792 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2025-01-09 04:10:56,792 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [9] total 9 [2025-01-09 04:10:56,792 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [735789633] [2025-01-09 04:10:56,792 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-01-09 04:10:56,792 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2025-01-09 04:10:56,792 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-09 04:10:56,794 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2025-01-09 04:10:56,794 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2025-01-09 04:10:56,795 INFO L87 Difference]: Start difference. First operand 52 states and 63 transitions. Second operand has 8 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 6 states have internal predecessors, (13), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2025-01-09 04:10:56,959 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-01-09 04:10:56,959 INFO L93 Difference]: Finished difference Result 61 states and 72 transitions. [2025-01-09 04:10:56,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2025-01-09 04:10:56,959 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 6 states have internal predecessors, (13), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 17 [2025-01-09 04:10:56,959 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-01-09 04:10:56,960 INFO L225 Difference]: With dead ends: 61 [2025-01-09 04:10:56,960 INFO L226 Difference]: Without dead ends: 59 [2025-01-09 04:10:56,961 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 21 SyntacticMatches, 4 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2025-01-09 04:10:56,961 INFO L435 NwaCegarLoop]: 42 mSDtfsCounter, 15 mSDsluCounter, 210 mSDsCounter, 0 mSdLazyCounter, 99 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 252 SdHoareTripleChecker+Invalid, 106 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 99 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-01-09 04:10:56,961 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 252 Invalid, 106 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 99 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-01-09 04:10:56,962 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2025-01-09 04:10:56,968 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 56. [2025-01-09 04:10:56,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 36 states have (on average 1.1111111111111112) internal successors, (40), 39 states have internal predecessors, (40), 13 states have call successors, (13), 6 states have call predecessors, (13), 6 states have return successors, (13), 12 states have call predecessors, (13), 12 states have call successors, (13) [2025-01-09 04:10:56,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 66 transitions. [2025-01-09 04:10:56,973 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 66 transitions. Word has length 17 [2025-01-09 04:10:56,973 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-01-09 04:10:56,973 INFO L471 AbstractCegarLoop]: Abstraction has 56 states and 66 transitions. [2025-01-09 04:10:56,973 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 6 states have internal predecessors, (13), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2025-01-09 04:10:56,973 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 66 transitions. [2025-01-09 04:10:56,974 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2025-01-09 04:10:56,974 INFO L210 NwaCegarLoop]: Found error trace [2025-01-09 04:10:56,974 INFO L218 NwaCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-01-09 04:10:56,982 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2025-01-09 04:10:57,174 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-09 04:10:57,175 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-01-09 04:10:57,175 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-09 04:10:57,175 INFO L85 PathProgramCache]: Analyzing trace with hash -1124067473, now seen corresponding path program 1 times [2025-01-09 04:10:57,175 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-09 04:10:57,175 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1443206822] [2025-01-09 04:10:57,175 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-09 04:10:57,175 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-09 04:10:57,188 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 27 statements into 1 equivalence classes. [2025-01-09 04:10:57,218 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 27 of 27 statements. [2025-01-09 04:10:57,222 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-09 04:10:57,222 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unknown [2025-01-09 04:10:57,225 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [839815457] [2025-01-09 04:10:57,229 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-09 04:10:57,230 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-09 04:10:57,230 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-09 04:10:57,233 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-01-09 04:10:57,234 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2025-01-09 04:10:57,306 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 27 statements into 1 equivalence classes. [2025-01-09 04:10:57,346 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 27 of 27 statements. [2025-01-09 04:10:57,346 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-09 04:10:57,346 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 04:10:57,349 INFO L256 TraceCheckSpWp]: Trace formula consists of 286 conjuncts, 59 conjuncts are in the unsatisfiable core [2025-01-09 04:10:57,354 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-09 04:10:57,359 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2025-01-09 04:10:57,371 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2025-01-09 04:10:57,376 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2025-01-09 04:10:57,424 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2025-01-09 04:10:57,427 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2025-01-09 04:10:57,458 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2025-01-09 04:10:57,458 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-01-09 04:10:57,458 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-09 04:10:57,458 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1443206822] [2025-01-09 04:10:57,458 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2025-01-09 04:10:57,458 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [839815457] [2025-01-09 04:10:57,458 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [839815457] provided 1 perfect and 0 imperfect interpolant sequences [2025-01-09 04:10:57,458 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-01-09 04:10:57,458 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2025-01-09 04:10:57,458 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [776642934] [2025-01-09 04:10:57,458 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-01-09 04:10:57,459 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2025-01-09 04:10:57,459 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-09 04:10:57,459 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2025-01-09 04:10:57,459 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2025-01-09 04:10:57,460 INFO L87 Difference]: Start difference. First operand 56 states and 66 transitions. Second operand has 8 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 6 states have internal predecessors, (17), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2025-01-09 04:10:57,640 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-01-09 04:10:57,641 INFO L93 Difference]: Finished difference Result 77 states and 92 transitions. [2025-01-09 04:10:57,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2025-01-09 04:10:57,641 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 6 states have internal predecessors, (17), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 27 [2025-01-09 04:10:57,641 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-01-09 04:10:57,644 INFO L225 Difference]: With dead ends: 77 [2025-01-09 04:10:57,644 INFO L226 Difference]: Without dead ends: 75 [2025-01-09 04:10:57,645 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2025-01-09 04:10:57,645 INFO L435 NwaCegarLoop]: 40 mSDtfsCounter, 19 mSDsluCounter, 184 mSDsCounter, 0 mSdLazyCounter, 127 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 224 SdHoareTripleChecker+Invalid, 137 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 127 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-01-09 04:10:57,645 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 224 Invalid, 137 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 127 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-01-09 04:10:57,646 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2025-01-09 04:10:57,659 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 71. [2025-01-09 04:10:57,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 46 states have (on average 1.108695652173913) internal successors, (51), 49 states have internal predecessors, (51), 16 states have call successors, (16), 8 states have call predecessors, (16), 8 states have return successors, (17), 15 states have call predecessors, (17), 15 states have call successors, (17) [2025-01-09 04:10:57,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 84 transitions. [2025-01-09 04:10:57,662 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 84 transitions. Word has length 27 [2025-01-09 04:10:57,662 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-01-09 04:10:57,662 INFO L471 AbstractCegarLoop]: Abstraction has 71 states and 84 transitions. [2025-01-09 04:10:57,662 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 6 states have internal predecessors, (17), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2025-01-09 04:10:57,662 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 84 transitions. [2025-01-09 04:10:57,663 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2025-01-09 04:10:57,663 INFO L210 NwaCegarLoop]: Found error trace [2025-01-09 04:10:57,663 INFO L218 NwaCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-01-09 04:10:57,673 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2025-01-09 04:10:57,868 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-09 04:10:57,868 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-01-09 04:10:57,868 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-09 04:10:57,868 INFO L85 PathProgramCache]: Analyzing trace with hash -1573514457, now seen corresponding path program 1 times [2025-01-09 04:10:57,868 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-09 04:10:57,868 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [525980535] [2025-01-09 04:10:57,869 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-09 04:10:57,869 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-09 04:10:57,892 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 27 statements into 1 equivalence classes. [2025-01-09 04:10:57,935 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 27 of 27 statements. [2025-01-09 04:10:57,935 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-09 04:10:57,935 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unknown [2025-01-09 04:10:57,938 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1496644096] [2025-01-09 04:10:57,938 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-09 04:10:57,938 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-09 04:10:57,938 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-09 04:10:57,940 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-01-09 04:10:57,942 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2025-01-09 04:10:58,014 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 27 statements into 1 equivalence classes. [2025-01-09 04:10:58,050 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 27 of 27 statements. [2025-01-09 04:10:58,051 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-09 04:10:58,051 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 04:10:58,052 INFO L256 TraceCheckSpWp]: Trace formula consists of 230 conjuncts, 43 conjuncts are in the unsatisfiable core [2025-01-09 04:10:58,057 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-09 04:10:58,064 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2025-01-09 04:10:58,070 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2025-01-09 04:10:58,076 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2025-01-09 04:10:58,099 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2025-01-09 04:10:58,238 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2025-01-09 04:10:58,241 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2025-01-09 04:10:58,245 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 [2025-01-09 04:10:58,272 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2025-01-09 04:10:58,272 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-01-09 04:10:58,272 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-09 04:10:58,272 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [525980535] [2025-01-09 04:10:58,272 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2025-01-09 04:10:58,272 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1496644096] [2025-01-09 04:10:58,272 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1496644096] provided 1 perfect and 0 imperfect interpolant sequences [2025-01-09 04:10:58,272 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-01-09 04:10:58,272 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2025-01-09 04:10:58,273 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2006217794] [2025-01-09 04:10:58,273 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-01-09 04:10:58,273 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2025-01-09 04:10:58,273 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-09 04:10:58,273 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2025-01-09 04:10:58,274 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2025-01-09 04:10:58,274 INFO L87 Difference]: Start difference. First operand 71 states and 84 transitions. Second operand has 8 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 7 states have internal predecessors, (17), 3 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2025-01-09 04:10:58,494 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-01-09 04:10:58,494 INFO L93 Difference]: Finished difference Result 81 states and 93 transitions. [2025-01-09 04:10:58,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2025-01-09 04:10:58,495 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 7 states have internal predecessors, (17), 3 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 27 [2025-01-09 04:10:58,495 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-01-09 04:10:58,496 INFO L225 Difference]: With dead ends: 81 [2025-01-09 04:10:58,496 INFO L226 Difference]: Without dead ends: 71 [2025-01-09 04:10:58,496 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2025-01-09 04:10:58,497 INFO L435 NwaCegarLoop]: 13 mSDtfsCounter, 26 mSDsluCounter, 50 mSDsCounter, 0 mSdLazyCounter, 238 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 63 SdHoareTripleChecker+Invalid, 244 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 238 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2025-01-09 04:10:58,497 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [32 Valid, 63 Invalid, 244 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 238 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2025-01-09 04:10:58,498 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2025-01-09 04:10:58,514 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 71. [2025-01-09 04:10:58,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 46 states have (on average 1.0869565217391304) internal successors, (50), 48 states have internal predecessors, (50), 16 states have call successors, (16), 8 states have call predecessors, (16), 8 states have return successors, (17), 15 states have call predecessors, (17), 15 states have call successors, (17) [2025-01-09 04:10:58,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 83 transitions. [2025-01-09 04:10:58,517 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 83 transitions. Word has length 27 [2025-01-09 04:10:58,517 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-01-09 04:10:58,517 INFO L471 AbstractCegarLoop]: Abstraction has 71 states and 83 transitions. [2025-01-09 04:10:58,517 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 7 states have internal predecessors, (17), 3 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2025-01-09 04:10:58,517 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 83 transitions. [2025-01-09 04:10:58,518 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2025-01-09 04:10:58,519 INFO L210 NwaCegarLoop]: Found error trace [2025-01-09 04:10:58,519 INFO L218 NwaCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-01-09 04:10:58,527 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2025-01-09 04:10:58,723 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-09 04:10:58,723 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-01-09 04:10:58,723 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-09 04:10:58,723 INFO L85 PathProgramCache]: Analyzing trace with hash 820461351, now seen corresponding path program 1 times [2025-01-09 04:10:58,724 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-09 04:10:58,724 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1324657917] [2025-01-09 04:10:58,724 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-09 04:10:58,724 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-09 04:10:58,737 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 33 statements into 1 equivalence classes. [2025-01-09 04:10:58,782 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 33 of 33 statements. [2025-01-09 04:10:58,782 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-09 04:10:58,782 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unknown [2025-01-09 04:10:58,788 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2023353754] [2025-01-09 04:10:58,788 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-09 04:10:58,788 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-09 04:10:58,788 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-09 04:10:58,791 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-01-09 04:10:58,792 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2025-01-09 04:10:58,865 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 33 statements into 1 equivalence classes. [2025-01-09 04:10:58,921 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 33 of 33 statements. [2025-01-09 04:10:58,921 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-09 04:10:58,921 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 04:10:58,925 INFO L256 TraceCheckSpWp]: Trace formula consists of 303 conjuncts, 69 conjuncts are in the unsatisfiable core [2025-01-09 04:10:58,929 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-09 04:10:58,936 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2025-01-09 04:10:58,942 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2025-01-09 04:10:58,948 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2025-01-09 04:10:59,245 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2025-01-09 04:10:59,248 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2025-01-09 04:10:59,286 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2025-01-09 04:10:59,286 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-01-09 04:10:59,424 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2025-01-09 04:10:59,424 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-09 04:10:59,424 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1324657917] [2025-01-09 04:10:59,424 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2025-01-09 04:10:59,424 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2023353754] [2025-01-09 04:10:59,424 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2023353754] provided 1 perfect and 1 imperfect interpolant sequences [2025-01-09 04:10:59,424 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2025-01-09 04:10:59,424 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [11] total 11 [2025-01-09 04:10:59,424 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1702072823] [2025-01-09 04:10:59,424 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-01-09 04:10:59,425 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2025-01-09 04:10:59,425 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-09 04:10:59,425 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2025-01-09 04:10:59,425 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2025-01-09 04:10:59,425 INFO L87 Difference]: Start difference. First operand 71 states and 83 transitions. Second operand has 10 states, 8 states have (on average 2.25) internal successors, (18), 7 states have internal predecessors, (18), 4 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2025-01-09 04:10:59,704 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-01-09 04:10:59,705 INFO L93 Difference]: Finished difference Result 104 states and 125 transitions. [2025-01-09 04:10:59,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2025-01-09 04:10:59,705 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 8 states have (on average 2.25) internal successors, (18), 7 states have internal predecessors, (18), 4 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 33 [2025-01-09 04:10:59,706 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-01-09 04:10:59,706 INFO L225 Difference]: With dead ends: 104 [2025-01-09 04:10:59,707 INFO L226 Difference]: Without dead ends: 102 [2025-01-09 04:10:59,707 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 47 SyntacticMatches, 8 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2025-01-09 04:10:59,707 INFO L435 NwaCegarLoop]: 37 mSDtfsCounter, 24 mSDsluCounter, 207 mSDsCounter, 0 mSdLazyCounter, 209 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 244 SdHoareTripleChecker+Invalid, 224 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 209 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2025-01-09 04:10:59,708 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [24 Valid, 244 Invalid, 224 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 209 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2025-01-09 04:10:59,708 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2025-01-09 04:10:59,724 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 101. [2025-01-09 04:10:59,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 64 states have (on average 1.09375) internal successors, (70), 68 states have internal predecessors, (70), 25 states have call successors, (25), 11 states have call predecessors, (25), 11 states have return successors, (27), 23 states have call predecessors, (27), 24 states have call successors, (27) [2025-01-09 04:10:59,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 122 transitions. [2025-01-09 04:10:59,726 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 122 transitions. Word has length 33 [2025-01-09 04:10:59,726 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-01-09 04:10:59,727 INFO L471 AbstractCegarLoop]: Abstraction has 101 states and 122 transitions. [2025-01-09 04:10:59,727 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 8 states have (on average 2.25) internal successors, (18), 7 states have internal predecessors, (18), 4 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2025-01-09 04:10:59,727 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 122 transitions. [2025-01-09 04:10:59,727 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2025-01-09 04:10:59,728 INFO L210 NwaCegarLoop]: Found error trace [2025-01-09 04:10:59,728 INFO L218 NwaCegarLoop]: trace histogram [5, 4, 4, 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] [2025-01-09 04:10:59,736 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 [2025-01-09 04:10:59,932 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-09 04:10:59,932 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-01-09 04:10:59,932 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-09 04:10:59,932 INFO L85 PathProgramCache]: Analyzing trace with hash -141130275, now seen corresponding path program 1 times [2025-01-09 04:10:59,932 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-09 04:10:59,933 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1565181194] [2025-01-09 04:10:59,933 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-09 04:10:59,933 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-09 04:10:59,944 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 39 statements into 1 equivalence classes. [2025-01-09 04:10:59,959 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 39 of 39 statements. [2025-01-09 04:10:59,959 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-09 04:10:59,959 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 04:11:01,009 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2025-01-09 04:11:01,009 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-09 04:11:01,009 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1565181194] [2025-01-09 04:11:01,009 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1565181194] provided 1 perfect and 0 imperfect interpolant sequences [2025-01-09 04:11:01,009 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-01-09 04:11:01,009 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2025-01-09 04:11:01,009 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1665674110] [2025-01-09 04:11:01,009 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-01-09 04:11:01,009 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2025-01-09 04:11:01,009 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-09 04:11:01,010 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2025-01-09 04:11:01,010 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=180, Unknown=0, NotChecked=0, Total=210 [2025-01-09 04:11:01,010 INFO L87 Difference]: Start difference. First operand 101 states and 122 transitions. Second operand has 15 states, 11 states have (on average 1.7272727272727273) internal successors, (19), 12 states have internal predecessors, (19), 7 states have call successors, (7), 4 states have call predecessors, (7), 1 states have return successors, (4), 2 states have call predecessors, (4), 4 states have call successors, (4) [2025-01-09 04:11:01,373 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-01-09 04:11:01,373 INFO L93 Difference]: Finished difference Result 107 states and 127 transitions. [2025-01-09 04:11:01,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2025-01-09 04:11:01,374 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 11 states have (on average 1.7272727272727273) internal successors, (19), 12 states have internal predecessors, (19), 7 states have call successors, (7), 4 states have call predecessors, (7), 1 states have return successors, (4), 2 states have call predecessors, (4), 4 states have call successors, (4) Word has length 39 [2025-01-09 04:11:01,374 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-01-09 04:11:01,375 INFO L225 Difference]: With dead ends: 107 [2025-01-09 04:11:01,375 INFO L226 Difference]: Without dead ends: 105 [2025-01-09 04:11:01,376 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=72, Invalid=434, Unknown=0, NotChecked=0, Total=506 [2025-01-09 04:11:01,376 INFO L435 NwaCegarLoop]: 30 mSDtfsCounter, 31 mSDsluCounter, 218 mSDsCounter, 0 mSdLazyCounter, 342 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 248 SdHoareTripleChecker+Invalid, 363 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 342 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2025-01-09 04:11:01,376 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [32 Valid, 248 Invalid, 363 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 342 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2025-01-09 04:11:01,377 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2025-01-09 04:11:01,398 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 105. [2025-01-09 04:11:01,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 67 states have (on average 1.0895522388059702) internal successors, (73), 71 states have internal predecessors, (73), 25 states have call successors, (25), 12 states have call predecessors, (25), 12 states have return successors, (27), 23 states have call predecessors, (27), 24 states have call successors, (27) [2025-01-09 04:11:01,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 125 transitions. [2025-01-09 04:11:01,401 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 125 transitions. Word has length 39 [2025-01-09 04:11:01,401 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-01-09 04:11:01,402 INFO L471 AbstractCegarLoop]: Abstraction has 105 states and 125 transitions. [2025-01-09 04:11:01,402 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 11 states have (on average 1.7272727272727273) internal successors, (19), 12 states have internal predecessors, (19), 7 states have call successors, (7), 4 states have call predecessors, (7), 1 states have return successors, (4), 2 states have call predecessors, (4), 4 states have call successors, (4) [2025-01-09 04:11:01,402 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 125 transitions. [2025-01-09 04:11:01,403 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2025-01-09 04:11:01,403 INFO L210 NwaCegarLoop]: Found error trace [2025-01-09 04:11:01,403 INFO L218 NwaCegarLoop]: trace histogram [6, 5, 5, 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, 1] [2025-01-09 04:11:01,404 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2025-01-09 04:11:01,404 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-01-09 04:11:01,404 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-09 04:11:01,405 INFO L85 PathProgramCache]: Analyzing trace with hash -123525151, now seen corresponding path program 1 times [2025-01-09 04:11:01,405 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-09 04:11:01,405 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [880972481] [2025-01-09 04:11:01,405 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-09 04:11:01,405 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-09 04:11:01,420 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 46 statements into 1 equivalence classes. [2025-01-09 04:11:01,449 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 46 of 46 statements. [2025-01-09 04:11:01,450 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-09 04:11:01,450 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unknown [2025-01-09 04:11:01,451 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [383662292] [2025-01-09 04:11:01,452 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-09 04:11:01,452 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-09 04:11:01,452 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-09 04:11:01,454 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-01-09 04:11:01,456 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2025-01-09 04:11:01,529 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 46 statements into 1 equivalence classes. [2025-01-09 04:11:01,578 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 46 of 46 statements. [2025-01-09 04:11:01,578 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-09 04:11:01,579 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 04:11:01,581 INFO L256 TraceCheckSpWp]: Trace formula consists of 334 conjuncts, 83 conjuncts are in the unsatisfiable core [2025-01-09 04:11:01,586 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-09 04:11:01,592 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2025-01-09 04:11:01,595 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2025-01-09 04:11:01,599 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2025-01-09 04:11:01,601 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2025-01-09 04:11:01,612 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2025-01-09 04:11:01,617 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2025-01-09 04:11:01,805 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2025-01-09 04:11:06,201 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 [2025-01-09 04:11:06,204 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 9 [2025-01-09 04:11:06,261 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 28 proven. 6 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2025-01-09 04:11:06,262 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-01-09 04:11:06,560 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2025-01-09 04:11:06,560 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-09 04:11:06,560 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [880972481] [2025-01-09 04:11:06,560 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2025-01-09 04:11:06,560 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [383662292] [2025-01-09 04:11:06,560 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [383662292] provided 1 perfect and 1 imperfect interpolant sequences [2025-01-09 04:11:06,560 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2025-01-09 04:11:06,560 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [10] total 15 [2025-01-09 04:11:06,560 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [856014227] [2025-01-09 04:11:06,560 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-01-09 04:11:06,561 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2025-01-09 04:11:06,561 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-09 04:11:06,561 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2025-01-09 04:11:06,561 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=174, Unknown=1, NotChecked=0, Total=210 [2025-01-09 04:11:06,561 INFO L87 Difference]: Start difference. First operand 105 states and 125 transitions. Second operand has 9 states, 7 states have (on average 3.0) internal successors, (21), 7 states have internal predecessors, (21), 4 states have call successors, (8), 3 states have call predecessors, (8), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2025-01-09 04:11:07,042 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-01-09 04:11:07,042 INFO L93 Difference]: Finished difference Result 116 states and 137 transitions. [2025-01-09 04:11:07,043 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2025-01-09 04:11:07,043 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 7 states have (on average 3.0) internal successors, (21), 7 states have internal predecessors, (21), 4 states have call successors, (8), 3 states have call predecessors, (8), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 46 [2025-01-09 04:11:07,043 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-01-09 04:11:07,045 INFO L225 Difference]: With dead ends: 116 [2025-01-09 04:11:07,047 INFO L226 Difference]: Without dead ends: 114 [2025-01-09 04:11:07,047 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 70 SyntacticMatches, 7 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 4.8s TimeCoverageRelationStatistics Valid=57, Invalid=284, Unknown=1, NotChecked=0, Total=342 [2025-01-09 04:11:07,048 INFO L435 NwaCegarLoop]: 38 mSDtfsCounter, 15 mSDsluCounter, 204 mSDsCounter, 0 mSdLazyCounter, 160 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 242 SdHoareTripleChecker+Invalid, 169 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 160 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2025-01-09 04:11:07,048 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 242 Invalid, 169 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 160 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2025-01-09 04:11:07,048 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2025-01-09 04:11:07,076 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 111. [2025-01-09 04:11:07,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 70 states have (on average 1.0857142857142856) internal successors, (76), 76 states have internal predecessors, (76), 27 states have call successors, (27), 13 states have call predecessors, (27), 13 states have return successors, (29), 23 states have call predecessors, (29), 26 states have call successors, (29) [2025-01-09 04:11:07,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 132 transitions. [2025-01-09 04:11:07,079 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 132 transitions. Word has length 46 [2025-01-09 04:11:07,079 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-01-09 04:11:07,079 INFO L471 AbstractCegarLoop]: Abstraction has 111 states and 132 transitions. [2025-01-09 04:11:07,079 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 7 states have (on average 3.0) internal successors, (21), 7 states have internal predecessors, (21), 4 states have call successors, (8), 3 states have call predecessors, (8), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2025-01-09 04:11:07,079 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 132 transitions. [2025-01-09 04:11:07,081 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2025-01-09 04:11:07,082 INFO L210 NwaCegarLoop]: Found error trace [2025-01-09 04:11:07,082 INFO L218 NwaCegarLoop]: trace histogram [6, 5, 5, 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, 1] [2025-01-09 04:11:07,091 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2025-01-09 04:11:07,287 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2025-01-09 04:11:07,287 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-01-09 04:11:07,287 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-09 04:11:07,287 INFO L85 PathProgramCache]: Analyzing trace with hash 1401802640, now seen corresponding path program 1 times [2025-01-09 04:11:07,287 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-09 04:11:07,288 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1584068388] [2025-01-09 04:11:07,288 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-09 04:11:07,288 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-09 04:11:07,300 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 52 statements into 1 equivalence classes. [2025-01-09 04:11:07,326 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 52 of 52 statements. [2025-01-09 04:11:07,327 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-09 04:11:07,327 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unknown [2025-01-09 04:11:07,329 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1281249938] [2025-01-09 04:11:07,329 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-09 04:11:07,329 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-09 04:11:07,329 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-09 04:11:07,331 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-01-09 04:11:07,333 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2025-01-09 04:11:07,417 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 52 statements into 1 equivalence classes. [2025-01-09 04:11:07,496 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 52 of 52 statements. [2025-01-09 04:11:07,496 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-09 04:11:07,496 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 04:11:07,499 INFO L256 TraceCheckSpWp]: Trace formula consists of 400 conjuncts, 59 conjuncts are in the unsatisfiable core [2025-01-09 04:11:07,503 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-09 04:11:07,507 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2025-01-09 04:11:07,512 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2025-01-09 04:11:07,517 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2025-01-09 04:11:07,535 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 11 treesize of output 7 [2025-01-09 04:11:07,618 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2025-01-09 04:11:07,621 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2025-01-09 04:11:07,655 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2025-01-09 04:11:07,656 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-01-09 04:11:07,656 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-09 04:11:07,656 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1584068388] [2025-01-09 04:11:07,656 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2025-01-09 04:11:07,656 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1281249938] [2025-01-09 04:11:07,656 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1281249938] provided 1 perfect and 0 imperfect interpolant sequences [2025-01-09 04:11:07,656 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-01-09 04:11:07,656 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2025-01-09 04:11:07,656 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [849000966] [2025-01-09 04:11:07,656 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-01-09 04:11:07,656 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2025-01-09 04:11:07,656 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-09 04:11:07,657 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2025-01-09 04:11:07,657 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2025-01-09 04:11:07,657 INFO L87 Difference]: Start difference. First operand 111 states and 132 transitions. Second operand has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 6 states have internal predecessors, (25), 4 states have call successors, (9), 4 states have call predecessors, (9), 2 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2025-01-09 04:11:08,030 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-01-09 04:11:08,030 INFO L93 Difference]: Finished difference Result 139 states and 169 transitions. [2025-01-09 04:11:08,031 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2025-01-09 04:11:08,031 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 6 states have internal predecessors, (25), 4 states have call successors, (9), 4 states have call predecessors, (9), 2 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) Word has length 52 [2025-01-09 04:11:08,031 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-01-09 04:11:08,033 INFO L225 Difference]: With dead ends: 139 [2025-01-09 04:11:08,033 INFO L226 Difference]: Without dead ends: 137 [2025-01-09 04:11:08,033 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2025-01-09 04:11:08,034 INFO L435 NwaCegarLoop]: 32 mSDtfsCounter, 31 mSDsluCounter, 111 mSDsCounter, 0 mSdLazyCounter, 241 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 143 SdHoareTripleChecker+Invalid, 264 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 241 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2025-01-09 04:11:08,034 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [34 Valid, 143 Invalid, 264 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 241 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2025-01-09 04:11:08,034 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2025-01-09 04:11:08,065 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 135. [2025-01-09 04:11:08,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 135 states, 84 states have (on average 1.0833333333333333) internal successors, (91), 91 states have internal predecessors, (91), 32 states have call successors, (32), 15 states have call predecessors, (32), 18 states have return successors, (41), 29 states have call predecessors, (41), 31 states have call successors, (41) [2025-01-09 04:11:08,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 164 transitions. [2025-01-09 04:11:08,068 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 164 transitions. Word has length 52 [2025-01-09 04:11:08,068 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-01-09 04:11:08,068 INFO L471 AbstractCegarLoop]: Abstraction has 135 states and 164 transitions. [2025-01-09 04:11:08,069 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 6 states have internal predecessors, (25), 4 states have call successors, (9), 4 states have call predecessors, (9), 2 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2025-01-09 04:11:08,069 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 164 transitions. [2025-01-09 04:11:08,071 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2025-01-09 04:11:08,071 INFO L210 NwaCegarLoop]: Found error trace [2025-01-09 04:11:08,071 INFO L218 NwaCegarLoop]: trace histogram [7, 6, 6, 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, 1] [2025-01-09 04:11:08,081 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2025-01-09 04:11:08,271 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-09 04:11:08,272 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-01-09 04:11:08,272 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-09 04:11:08,272 INFO L85 PathProgramCache]: Analyzing trace with hash -53166218, now seen corresponding path program 1 times [2025-01-09 04:11:08,272 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-09 04:11:08,272 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [642858535] [2025-01-09 04:11:08,272 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-09 04:11:08,272 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-09 04:11:08,284 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 55 statements into 1 equivalence classes. [2025-01-09 04:11:08,314 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 55 of 55 statements. [2025-01-09 04:11:08,314 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-09 04:11:08,314 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unknown [2025-01-09 04:11:08,315 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [994012483] [2025-01-09 04:11:08,315 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-09 04:11:08,316 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-09 04:11:08,316 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-09 04:11:08,318 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-01-09 04:11:08,321 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2025-01-09 04:11:08,402 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 55 statements into 1 equivalence classes. [2025-01-09 04:11:08,458 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 55 of 55 statements. [2025-01-09 04:11:08,458 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-09 04:11:08,458 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 04:11:08,462 INFO L256 TraceCheckSpWp]: Trace formula consists of 409 conjuncts, 89 conjuncts are in the unsatisfiable core [2025-01-09 04:11:08,466 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-09 04:11:08,471 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2025-01-09 04:11:08,479 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2025-01-09 04:11:08,485 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2025-01-09 04:11:08,782 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 17 [2025-01-09 04:11:08,789 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2025-01-09 04:11:08,842 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 [2025-01-09 04:11:08,846 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 9 [2025-01-09 04:11:08,897 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 36 proven. 11 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2025-01-09 04:11:08,898 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-01-09 04:11:09,097 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 12 proven. 1 refuted. 0 times theorem prover too weak. 62 trivial. 0 not checked. [2025-01-09 04:11:09,097 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-09 04:11:09,098 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [642858535] [2025-01-09 04:11:09,098 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2025-01-09 04:11:09,098 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [994012483] [2025-01-09 04:11:09,098 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [994012483] provided 0 perfect and 2 imperfect interpolant sequences [2025-01-09 04:11:09,098 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2025-01-09 04:11:09,098 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8] total 15 [2025-01-09 04:11:09,098 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1712398013] [2025-01-09 04:11:09,098 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2025-01-09 04:11:09,099 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2025-01-09 04:11:09,099 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-09 04:11:09,099 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2025-01-09 04:11:09,099 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=174, Unknown=0, NotChecked=0, Total=210 [2025-01-09 04:11:09,100 INFO L87 Difference]: Start difference. First operand 135 states and 164 transitions. Second operand has 15 states, 11 states have (on average 3.272727272727273) internal successors, (36), 11 states have internal predecessors, (36), 8 states have call successors, (17), 6 states have call predecessors, (17), 2 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2025-01-09 04:11:09,810 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-01-09 04:11:09,810 INFO L93 Difference]: Finished difference Result 197 states and 240 transitions. [2025-01-09 04:11:09,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2025-01-09 04:11:09,811 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 11 states have (on average 3.272727272727273) internal successors, (36), 11 states have internal predecessors, (36), 8 states have call successors, (17), 6 states have call predecessors, (17), 2 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) Word has length 55 [2025-01-09 04:11:09,811 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-01-09 04:11:09,813 INFO L225 Difference]: With dead ends: 197 [2025-01-09 04:11:09,813 INFO L226 Difference]: Without dead ends: 195 [2025-01-09 04:11:09,813 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 86 SyntacticMatches, 9 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=98, Invalid=454, Unknown=0, NotChecked=0, Total=552 [2025-01-09 04:11:09,814 INFO L435 NwaCegarLoop]: 49 mSDtfsCounter, 75 mSDsluCounter, 246 mSDsCounter, 0 mSdLazyCounter, 378 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 75 SdHoareTripleChecker+Valid, 295 SdHoareTripleChecker+Invalid, 408 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 378 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2025-01-09 04:11:09,814 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [75 Valid, 295 Invalid, 408 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 378 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2025-01-09 04:11:09,815 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195 states. [2025-01-09 04:11:09,841 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195 to 189. [2025-01-09 04:11:09,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 189 states, 118 states have (on average 1.0847457627118644) internal successors, (128), 125 states have internal predecessors, (128), 41 states have call successors, (41), 21 states have call predecessors, (41), 29 states have return successors, (62), 43 states have call predecessors, (62), 39 states have call successors, (62) [2025-01-09 04:11:09,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 231 transitions. [2025-01-09 04:11:09,845 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 231 transitions. Word has length 55 [2025-01-09 04:11:09,845 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-01-09 04:11:09,845 INFO L471 AbstractCegarLoop]: Abstraction has 189 states and 231 transitions. [2025-01-09 04:11:09,845 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 11 states have (on average 3.272727272727273) internal successors, (36), 11 states have internal predecessors, (36), 8 states have call successors, (17), 6 states have call predecessors, (17), 2 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2025-01-09 04:11:09,845 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 231 transitions. [2025-01-09 04:11:09,846 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2025-01-09 04:11:09,848 INFO L210 NwaCegarLoop]: Found error trace [2025-01-09 04:11:09,848 INFO L218 NwaCegarLoop]: trace histogram [7, 6, 6, 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, 1, 1, 1, 1, 1, 1, 1, 1] [2025-01-09 04:11:09,857 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2025-01-09 04:11:10,048 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,9 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-09 04:11:10,049 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-01-09 04:11:10,049 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-09 04:11:10,049 INFO L85 PathProgramCache]: Analyzing trace with hash 658666501, now seen corresponding path program 2 times [2025-01-09 04:11:10,049 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-09 04:11:10,049 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [38975396] [2025-01-09 04:11:10,049 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-01-09 04:11:10,049 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-09 04:11:10,061 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 58 statements into 2 equivalence classes. [2025-01-09 04:11:10,083 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 58 of 58 statements. [2025-01-09 04:11:10,083 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-01-09 04:11:10,083 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unknown [2025-01-09 04:11:10,085 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1399272092] [2025-01-09 04:11:10,085 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-01-09 04:11:10,085 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-09 04:11:10,085 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-09 04:11:10,088 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-01-09 04:11:10,090 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2025-01-09 04:11:10,179 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 58 statements into 2 equivalence classes. [2025-01-09 04:11:10,254 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 58 of 58 statements. [2025-01-09 04:11:10,254 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-01-09 04:11:10,254 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 04:11:10,263 INFO L256 TraceCheckSpWp]: Trace formula consists of 417 conjuncts, 158 conjuncts are in the unsatisfiable core [2025-01-09 04:11:10,268 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-09 04:11:10,275 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2025-01-09 04:11:10,278 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2025-01-09 04:11:10,317 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2025-01-09 04:11:10,323 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2025-01-09 04:11:10,663 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2025-01-09 04:11:10,689 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2025-01-09 04:11:10,736 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 11 treesize of output 7 [2025-01-09 04:11:31,644 INFO L349 Elim1Store]: treesize reduction 21, result has 34.4 percent of original size [2025-01-09 04:11:31,645 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 25 [2025-01-09 04:11:31,659 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 50 treesize of output 38 [2025-01-09 04:11:31,690 INFO L349 Elim1Store]: treesize reduction 18, result has 52.6 percent of original size [2025-01-09 04:11:31,690 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 83 treesize of output 72 [2025-01-09 04:11:32,657 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-01-09 04:11:32,657 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 102 treesize of output 86 [2025-01-09 04:11:32,682 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-01-09 04:11:32,683 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 79 treesize of output 79 [2025-01-09 04:11:32,710 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-01-09 04:11:32,710 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 95 treesize of output 79 [2025-01-09 04:11:32,867 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 30 proven. 37 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2025-01-09 04:11:32,868 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-01-09 04:11:41,989 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-09 04:11:41,989 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [38975396] [2025-01-09 04:11:41,990 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2025-01-09 04:11:41,990 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1399272092] [2025-01-09 04:11:41,990 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1399272092] provided 0 perfect and 1 imperfect interpolant sequences [2025-01-09 04:11:41,990 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2025-01-09 04:11:41,990 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2025-01-09 04:11:41,990 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [968831679] [2025-01-09 04:11:41,990 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2025-01-09 04:11:41,990 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2025-01-09 04:11:41,990 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-09 04:11:41,991 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2025-01-09 04:11:41,991 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=1052, Unknown=7, NotChecked=0, Total=1190 [2025-01-09 04:11:41,991 INFO L87 Difference]: Start difference. First operand 189 states and 231 transitions. Second operand has 24 states, 20 states have (on average 1.75) internal successors, (35), 19 states have internal predecessors, (35), 7 states have call successors, (10), 7 states have call predecessors, (10), 5 states have return successors, (7), 4 states have call predecessors, (7), 5 states have call successors, (7) [2025-01-09 04:11:46,059 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2025-01-09 04:12:04,741 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-01-09 04:12:04,741 INFO L93 Difference]: Finished difference Result 319 states and 370 transitions. [2025-01-09 04:12:04,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2025-01-09 04:12:04,742 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 20 states have (on average 1.75) internal successors, (35), 19 states have internal predecessors, (35), 7 states have call successors, (10), 7 states have call predecessors, (10), 5 states have return successors, (7), 4 states have call predecessors, (7), 5 states have call successors, (7) Word has length 58 [2025-01-09 04:12:04,742 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-01-09 04:12:04,744 INFO L225 Difference]: With dead ends: 319 [2025-01-09 04:12:04,744 INFO L226 Difference]: Without dead ends: 317 [2025-01-09 04:12:04,746 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 40 SyntacticMatches, 4 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 586 ImplicationChecksByTransitivity, 47.1s TimeCoverageRelationStatistics Valid=252, Invalid=2089, Unknown=11, NotChecked=0, Total=2352 [2025-01-09 04:12:04,746 INFO L435 NwaCegarLoop]: 44 mSDtfsCounter, 60 mSDsluCounter, 288 mSDsCounter, 0 mSdLazyCounter, 920 mSolverCounterSat, 23 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 332 SdHoareTripleChecker+Invalid, 944 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 920 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.3s IncrementalHoareTripleChecker+Time [2025-01-09 04:12:04,746 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [63 Valid, 332 Invalid, 944 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 920 Invalid, 1 Unknown, 0 Unchecked, 5.3s Time] [2025-01-09 04:12:04,747 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 317 states. [2025-01-09 04:12:04,800 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 317 to 310. [2025-01-09 04:12:04,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 310 states, 198 states have (on average 1.0858585858585859) internal successors, (215), 208 states have internal predecessors, (215), 59 states have call successors, (59), 40 states have call predecessors, (59), 52 states have return successors, (89), 62 states have call predecessors, (89), 56 states have call successors, (89) [2025-01-09 04:12:04,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 310 states to 310 states and 363 transitions. [2025-01-09 04:12:04,803 INFO L78 Accepts]: Start accepts. Automaton has 310 states and 363 transitions. Word has length 58 [2025-01-09 04:12:04,804 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-01-09 04:12:04,804 INFO L471 AbstractCegarLoop]: Abstraction has 310 states and 363 transitions. [2025-01-09 04:12:04,804 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 20 states have (on average 1.75) internal successors, (35), 19 states have internal predecessors, (35), 7 states have call successors, (10), 7 states have call predecessors, (10), 5 states have return successors, (7), 4 states have call predecessors, (7), 5 states have call successors, (7) [2025-01-09 04:12:04,804 INFO L276 IsEmpty]: Start isEmpty. Operand 310 states and 363 transitions. [2025-01-09 04:12:04,805 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2025-01-09 04:12:04,805 INFO L210 NwaCegarLoop]: Found error trace [2025-01-09 04:12:04,805 INFO L218 NwaCegarLoop]: trace histogram [8, 7, 7, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-01-09 04:12:04,814 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 [2025-01-09 04:12:05,005 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-09 04:12:05,006 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-01-09 04:12:05,006 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-09 04:12:05,006 INFO L85 PathProgramCache]: Analyzing trace with hash 1483807187, now seen corresponding path program 1 times [2025-01-09 04:12:05,006 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-09 04:12:05,006 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2005828643] [2025-01-09 04:12:05,006 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-09 04:12:05,006 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-09 04:12:05,016 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 70 statements into 1 equivalence classes. [2025-01-09 04:12:05,050 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 70 of 70 statements. [2025-01-09 04:12:05,050 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-09 04:12:05,050 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unknown [2025-01-09 04:12:05,052 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [607309179] [2025-01-09 04:12:05,052 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-09 04:12:05,052 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-09 04:12:05,052 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-09 04:12:05,056 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-01-09 04:12:05,058 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2025-01-09 04:12:05,170 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 70 statements into 1 equivalence classes. [2025-01-09 04:12:05,233 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 70 of 70 statements. [2025-01-09 04:12:05,233 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-09 04:12:05,233 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 04:12:05,236 INFO L256 TraceCheckSpWp]: Trace formula consists of 443 conjuncts, 150 conjuncts are in the unsatisfiable core [2025-01-09 04:12:05,240 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-09 04:12:05,244 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2025-01-09 04:12:05,245 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2025-01-09 04:12:05,249 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2025-01-09 04:12:05,254 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2025-01-09 04:12:05,261 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2025-01-09 04:12:05,272 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 11 treesize of output 7 [2025-01-09 04:12:05,558 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2025-01-09 04:12:06,123 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 15 [2025-01-09 04:12:18,704 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2025-01-09 04:12:18,752 INFO L349 Elim1Store]: treesize reduction 22, result has 56.0 percent of original size [2025-01-09 04:12:18,752 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 57 treesize of output 62 [2025-01-09 04:12:18,913 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-01-09 04:12:18,913 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 114 treesize of output 98 [2025-01-09 04:12:18,943 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-01-09 04:12:18,943 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 135 treesize of output 131 [2025-01-09 04:12:18,952 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 103 treesize of output 79 [2025-01-09 04:12:19,057 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 61 proven. 17 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2025-01-09 04:12:19,057 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-01-09 04:12:20,326 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-09 04:12:20,326 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2005828643] [2025-01-09 04:12:20,326 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2025-01-09 04:12:20,326 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [607309179] [2025-01-09 04:12:20,327 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [607309179] provided 0 perfect and 1 imperfect interpolant sequences [2025-01-09 04:12:20,327 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2025-01-09 04:12:20,327 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2025-01-09 04:12:20,327 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [223881227] [2025-01-09 04:12:20,327 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2025-01-09 04:12:20,327 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2025-01-09 04:12:20,327 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-09 04:12:20,328 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2025-01-09 04:12:20,328 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=836, Unknown=3, NotChecked=0, Total=930 [2025-01-09 04:12:20,328 INFO L87 Difference]: Start difference. First operand 310 states and 363 transitions. Second operand has 28 states, 22 states have (on average 1.8181818181818181) internal successors, (40), 21 states have internal predecessors, (40), 9 states have call successors, (11), 6 states have call predecessors, (11), 7 states have return successors, (10), 8 states have call predecessors, (10), 8 states have call successors, (10) [2025-01-09 04:12:24,347 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2025-01-09 04:12:28,688 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0]