./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/recursified_nla-digbench/recursified_sqrt1-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_sqrt1-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 ac02a57e98f6481647f49b84c91fda6d0505e35fbffb37ed6b508f20e911a1af --- Real Ultimate output --- This is Ultimate 0.3.0-?-551b009-m [2025-01-09 04:14:16,917 INFO L188 SettingsManager]: Resetting all preferences to default values... [2025-01-09 04:14:16,985 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2025-01-09 04:14:16,990 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2025-01-09 04:14:16,990 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2025-01-09 04:14:17,012 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2025-01-09 04:14:17,013 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2025-01-09 04:14:17,013 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2025-01-09 04:14:17,013 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2025-01-09 04:14:17,014 INFO L153 SettingsManager]: * Use memory slicer=true [2025-01-09 04:14:17,014 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2025-01-09 04:14:17,014 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2025-01-09 04:14:17,014 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2025-01-09 04:14:17,014 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2025-01-09 04:14:17,014 INFO L153 SettingsManager]: * Use SBE=true [2025-01-09 04:14:17,015 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2025-01-09 04:14:17,015 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2025-01-09 04:14:17,015 INFO L153 SettingsManager]: * sizeof long=4 [2025-01-09 04:14:17,015 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2025-01-09 04:14:17,015 INFO L153 SettingsManager]: * sizeof POINTER=4 [2025-01-09 04:14:17,015 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2025-01-09 04:14:17,015 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2025-01-09 04:14:17,015 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2025-01-09 04:14:17,015 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2025-01-09 04:14:17,015 INFO L153 SettingsManager]: * sizeof long double=12 [2025-01-09 04:14:17,015 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2025-01-09 04:14:17,015 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2025-01-09 04:14:17,016 INFO L153 SettingsManager]: * Use constant arrays=true [2025-01-09 04:14:17,016 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2025-01-09 04:14:17,016 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2025-01-09 04:14:17,016 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2025-01-09 04:14:17,016 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2025-01-09 04:14:17,016 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-01-09 04:14:17,016 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2025-01-09 04:14:17,016 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2025-01-09 04:14:17,016 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2025-01-09 04:14:17,016 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2025-01-09 04:14:17,016 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-01-09 04:14:17,017 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2025-01-09 04:14:17,017 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2025-01-09 04:14:17,017 INFO L153 SettingsManager]: * Compute procedure contracts=false [2025-01-09 04:14:17,017 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2025-01-09 04:14:17,017 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2025-01-09 04:14:17,017 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2025-01-09 04:14:17,017 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2025-01-09 04:14:17,018 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2025-01-09 04:14:17,018 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2025-01-09 04:14:17,018 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2025-01-09 04:14:17,018 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 -> ac02a57e98f6481647f49b84c91fda6d0505e35fbffb37ed6b508f20e911a1af [2025-01-09 04:14:17,300 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2025-01-09 04:14:17,308 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2025-01-09 04:14:17,311 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2025-01-09 04:14:17,312 INFO L270 PluginConnector]: Initializing CDTParser... [2025-01-09 04:14:17,313 INFO L274 PluginConnector]: CDTParser initialized [2025-01-09 04:14:17,313 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/recursified_nla-digbench/recursified_sqrt1-ll.c [2025-01-09 04:14:18,582 INFO L533 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/612cddce8/5e45357a9a1140db98bd2465cb5b073d/FLAG936ed632c [2025-01-09 04:14:18,837 INFO L384 CDTParser]: Found 1 translation units. [2025-01-09 04:14:18,842 INFO L180 CDTParser]: Scanning /storage/repos/ultimate-jdk21/releaseScripts/default/sv-benchmarks/c/recursified_nla-digbench/recursified_sqrt1-ll.c [2025-01-09 04:14:18,853 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/612cddce8/5e45357a9a1140db98bd2465cb5b073d/FLAG936ed632c [2025-01-09 04:14:19,141 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/612cddce8/5e45357a9a1140db98bd2465cb5b073d [2025-01-09 04:14:19,143 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2025-01-09 04:14:19,145 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2025-01-09 04:14:19,147 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2025-01-09 04:14:19,147 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2025-01-09 04:14:19,150 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2025-01-09 04:14:19,153 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.01 04:14:19" (1/1) ... [2025-01-09 04:14:19,155 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2cb30f57 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 04:14:19, skipping insertion in model container [2025-01-09 04:14:19,155 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.01 04:14:19" (1/1) ... [2025-01-09 04:14:19,168 INFO L175 MainTranslator]: Built tables and reachable declarations [2025-01-09 04:14:19,302 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_sqrt1-ll.c[1052,1065] [2025-01-09 04:14:19,323 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-01-09 04:14:19,332 INFO L200 MainTranslator]: Completed pre-run [2025-01-09 04:14:19,340 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_sqrt1-ll.c[1052,1065] [2025-01-09 04:14:19,357 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-01-09 04:14:19,370 INFO L204 MainTranslator]: Completed translation [2025-01-09 04:14:19,371 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 04:14:19 WrapperNode [2025-01-09 04:14:19,371 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2025-01-09 04:14:19,372 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2025-01-09 04:14:19,372 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2025-01-09 04:14:19,372 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2025-01-09 04:14:19,378 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 04:14:19" (1/1) ... [2025-01-09 04:14:19,384 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 04:14:19" (1/1) ... [2025-01-09 04:14:19,400 INFO L138 Inliner]: procedures = 16, calls = 58, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 60 [2025-01-09 04:14:19,401 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2025-01-09 04:14:19,402 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2025-01-09 04:14:19,403 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2025-01-09 04:14:19,403 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2025-01-09 04:14:19,410 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 04:14:19" (1/1) ... [2025-01-09 04:14:19,410 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 04:14:19" (1/1) ... [2025-01-09 04:14:19,411 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 04:14:19" (1/1) ... [2025-01-09 04:14:19,428 INFO L175 MemorySlicer]: Split 33 memory accesses to 5 slices as follows [2, 2, 8, 9, 12]. 36 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0, 0, 0, 0]. The 7 writes are split as follows [0, 1, 2, 2, 2]. [2025-01-09 04:14:19,428 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 04:14:19" (1/1) ... [2025-01-09 04:14:19,428 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 04:14:19" (1/1) ... [2025-01-09 04:14:19,435 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 04:14:19" (1/1) ... [2025-01-09 04:14:19,436 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 04:14:19" (1/1) ... [2025-01-09 04:14:19,438 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 04:14:19" (1/1) ... [2025-01-09 04:14:19,441 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 04:14:19" (1/1) ... [2025-01-09 04:14:19,441 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 04:14:19" (1/1) ... [2025-01-09 04:14:19,443 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2025-01-09 04:14:19,444 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2025-01-09 04:14:19,444 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2025-01-09 04:14:19,444 INFO L274 PluginConnector]: RCFGBuilder initialized [2025-01-09 04:14:19,445 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 04:14:19" (1/1) ... [2025-01-09 04:14:19,451 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-01-09 04:14:19,461 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-09 04:14:19,472 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 04:14:19,473 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 04:14:19,490 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2025-01-09 04:14:19,490 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2025-01-09 04:14:19,490 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2025-01-09 04:14:19,490 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2025-01-09 04:14:19,490 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2025-01-09 04:14:19,490 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#4 [2025-01-09 04:14:19,490 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2025-01-09 04:14:19,490 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2025-01-09 04:14:19,491 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2025-01-09 04:14:19,491 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2025-01-09 04:14:19,491 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2025-01-09 04:14:19,491 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#4 [2025-01-09 04:14:19,491 INFO L130 BoogieDeclarations]: Found specification of procedure func_to_recursive_line_29_to_40_0 [2025-01-09 04:14:19,491 INFO L138 BoogieDeclarations]: Found implementation of procedure func_to_recursive_line_29_to_40_0 [2025-01-09 04:14:19,491 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2025-01-09 04:14:19,491 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2025-01-09 04:14:19,491 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2025-01-09 04:14:19,491 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2025-01-09 04:14:19,492 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2025-01-09 04:14:19,492 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#3 [2025-01-09 04:14:19,492 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#4 [2025-01-09 04:14:19,492 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2025-01-09 04:14:19,492 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2025-01-09 04:14:19,492 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2025-01-09 04:14:19,564 INFO L234 CfgBuilder]: Building ICFG [2025-01-09 04:14:19,565 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2025-01-09 04:14:19,725 INFO L? ?]: Removed 7 outVars from TransFormulas that were not future-live. [2025-01-09 04:14:19,726 INFO L283 CfgBuilder]: Performing block encoding [2025-01-09 04:14:19,735 INFO L307 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2025-01-09 04:14:19,735 INFO L312 CfgBuilder]: Removed 1 assume(true) statements. [2025-01-09 04:14:19,735 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.01 04:14:19 BoogieIcfgContainer [2025-01-09 04:14:19,736 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2025-01-09 04:14:19,738 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2025-01-09 04:14:19,739 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2025-01-09 04:14:19,744 INFO L274 PluginConnector]: TraceAbstraction initialized [2025-01-09 04:14:19,745 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.01 04:14:19" (1/3) ... [2025-01-09 04:14:19,745 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3a56af0f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.01 04:14:19, skipping insertion in model container [2025-01-09 04:14:19,745 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 04:14:19" (2/3) ... [2025-01-09 04:14:19,746 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3a56af0f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.01 04:14:19, skipping insertion in model container [2025-01-09 04:14:19,747 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.01 04:14:19" (3/3) ... [2025-01-09 04:14:19,748 INFO L128 eAbstractionObserver]: Analyzing ICFG recursified_sqrt1-ll.c [2025-01-09 04:14:19,763 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2025-01-09 04:14:19,765 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG recursified_sqrt1-ll.c that has 3 procedures, 31 locations, 1 initial locations, 0 loop locations, and 1 error locations. [2025-01-09 04:14:19,810 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2025-01-09 04:14:19,821 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;@7bc8f6d5, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2025-01-09 04:14:19,821 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2025-01-09 04:14:19,825 INFO L276 IsEmpty]: Start isEmpty. Operand has 31 states, 19 states have (on average 1.2105263157894737) internal successors, (23), 21 states have internal predecessors, (23), 8 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2025-01-09 04:14:19,830 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2025-01-09 04:14:19,830 INFO L210 NwaCegarLoop]: Found error trace [2025-01-09 04:14:19,831 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-01-09 04:14:19,831 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-01-09 04:14:19,835 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-09 04:14:19,835 INFO L85 PathProgramCache]: Analyzing trace with hash 970534123, now seen corresponding path program 1 times [2025-01-09 04:14:19,840 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-09 04:14:19,841 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [481846210] [2025-01-09 04:14:19,841 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-09 04:14:19,841 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-09 04:14:19,917 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 9 statements into 1 equivalence classes. [2025-01-09 04:14:19,961 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 9 of 9 statements. [2025-01-09 04:14:19,962 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-09 04:14:19,962 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 04:14:20,633 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 04:14:20,634 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-09 04:14:20,634 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [481846210] [2025-01-09 04:14:20,635 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [481846210] provided 1 perfect and 0 imperfect interpolant sequences [2025-01-09 04:14:20,635 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-01-09 04:14:20,636 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2025-01-09 04:14:20,637 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2112312890] [2025-01-09 04:14:20,637 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-01-09 04:14:20,641 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2025-01-09 04:14:20,641 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-09 04:14:20,656 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2025-01-09 04:14:20,657 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2025-01-09 04:14:20,658 INFO L87 Difference]: Start difference. First operand has 31 states, 19 states have (on average 1.2105263157894737) internal successors, (23), 21 states have internal predecessors, (23), 8 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) Second operand has 8 states, 6 states have (on average 1.1666666666666667) internal successors, (7), 6 states have internal predecessors, (7), 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 04:14:20,897 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-01-09 04:14:20,898 INFO L93 Difference]: Finished difference Result 77 states and 110 transitions. [2025-01-09 04:14:20,899 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2025-01-09 04:14:20,900 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 6 states have (on average 1.1666666666666667) internal successors, (7), 6 states have internal predecessors, (7), 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 9 [2025-01-09 04:14:20,901 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-01-09 04:14:20,906 INFO L225 Difference]: With dead ends: 77 [2025-01-09 04:14:20,907 INFO L226 Difference]: Without dead ends: 45 [2025-01-09 04:14:20,912 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 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 04:14:20,914 INFO L435 NwaCegarLoop]: 26 mSDtfsCounter, 17 mSDsluCounter, 125 mSDsCounter, 0 mSdLazyCounter, 106 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 151 SdHoareTripleChecker+Invalid, 114 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 106 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-01-09 04:14:20,915 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 151 Invalid, 114 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 106 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-01-09 04:14:20,928 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2025-01-09 04:14:20,945 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 42. [2025-01-09 04:14:20,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 26 states have (on average 1.1153846153846154) internal successors, (29), 28 states have internal predecessors, (29), 11 states have call successors, (11), 4 states have call predecessors, (11), 4 states have return successors, (11), 10 states have call predecessors, (11), 10 states have call successors, (11) [2025-01-09 04:14:20,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 51 transitions. [2025-01-09 04:14:20,954 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 51 transitions. Word has length 9 [2025-01-09 04:14:20,954 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-01-09 04:14:20,954 INFO L471 AbstractCegarLoop]: Abstraction has 42 states and 51 transitions. [2025-01-09 04:14:20,955 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 6 states have (on average 1.1666666666666667) internal successors, (7), 6 states have internal predecessors, (7), 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 04:14:20,956 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 51 transitions. [2025-01-09 04:14:20,956 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2025-01-09 04:14:20,956 INFO L210 NwaCegarLoop]: Found error trace [2025-01-09 04:14:20,956 INFO L218 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-01-09 04:14:20,957 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2025-01-09 04:14:20,957 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-01-09 04:14:20,958 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-09 04:14:20,958 INFO L85 PathProgramCache]: Analyzing trace with hash 833326136, now seen corresponding path program 1 times [2025-01-09 04:14:20,958 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-09 04:14:20,958 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2131699254] [2025-01-09 04:14:20,959 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-09 04:14:20,959 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-09 04:14:20,976 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 15 statements into 1 equivalence classes. [2025-01-09 04:14:20,992 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 15 of 15 statements. [2025-01-09 04:14:20,992 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-09 04:14:20,992 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unknown [2025-01-09 04:14:20,994 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1841433282] [2025-01-09 04:14:20,994 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-09 04:14:20,994 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-09 04:14:20,994 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-09 04:14:20,998 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 04:14:20,999 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 04:14:21,050 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 15 statements into 1 equivalence classes. [2025-01-09 04:14:21,075 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 15 of 15 statements. [2025-01-09 04:14:21,076 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-09 04:14:21,076 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 04:14:21,078 INFO L256 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 42 conjuncts are in the unsatisfiable core [2025-01-09 04:14:21,083 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-09 04:14:21,120 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 04:14:21,128 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 04:14:21,419 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 04:14:21,419 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-01-09 04:14:21,694 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 43 treesize of output 27 [2025-01-09 04:14:21,868 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-01-09 04:14:21,870 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-09 04:14:21,870 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2131699254] [2025-01-09 04:14:21,871 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2025-01-09 04:14:21,871 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1841433282] [2025-01-09 04:14:21,872 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1841433282] provided 0 perfect and 2 imperfect interpolant sequences [2025-01-09 04:14:21,872 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2025-01-09 04:14:21,872 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 21 [2025-01-09 04:14:21,873 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [418262458] [2025-01-09 04:14:21,873 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2025-01-09 04:14:21,873 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2025-01-09 04:14:21,873 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-09 04:14:21,874 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2025-01-09 04:14:21,875 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=360, Unknown=0, NotChecked=0, Total=420 [2025-01-09 04:14:21,876 INFO L87 Difference]: Start difference. First operand 42 states and 51 transitions. Second operand has 21 states, 15 states have (on average 1.2) internal successors, (18), 15 states have internal predecessors, (18), 6 states have call successors, (6), 5 states have call predecessors, (6), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2025-01-09 04:14:26,546 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 3.87s for a HTC check with result VALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2025-01-09 04:14:26,881 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-01-09 04:14:26,881 INFO L93 Difference]: Finished difference Result 69 states and 82 transitions. [2025-01-09 04:14:26,884 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2025-01-09 04:14:26,885 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 15 states have (on average 1.2) internal successors, (18), 15 states have internal predecessors, (18), 6 states have call successors, (6), 5 states have call predecessors, (6), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 15 [2025-01-09 04:14:26,885 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-01-09 04:14:26,887 INFO L225 Difference]: With dead ends: 69 [2025-01-09 04:14:26,887 INFO L226 Difference]: Without dead ends: 67 [2025-01-09 04:14:26,888 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 7 SyntacticMatches, 2 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 168 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=191, Invalid=931, Unknown=0, NotChecked=0, Total=1122 [2025-01-09 04:14:26,888 INFO L435 NwaCegarLoop]: 16 mSDtfsCounter, 68 mSDsluCounter, 119 mSDsCounter, 0 mSdLazyCounter, 352 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 70 SdHoareTripleChecker+Valid, 135 SdHoareTripleChecker+Invalid, 394 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 352 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.6s IncrementalHoareTripleChecker+Time [2025-01-09 04:14:26,891 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [70 Valid, 135 Invalid, 394 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 352 Invalid, 0 Unknown, 0 Unchecked, 4.6s Time] [2025-01-09 04:14:26,891 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2025-01-09 04:14:26,918 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 62. [2025-01-09 04:14:26,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 39 states have (on average 1.1025641025641026) internal successors, (43), 41 states have internal predecessors, (43), 14 states have call successors, (14), 7 states have call predecessors, (14), 8 states have return successors, (14), 13 states have call predecessors, (14), 12 states have call successors, (14) [2025-01-09 04:14:26,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 71 transitions. [2025-01-09 04:14:26,921 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 71 transitions. Word has length 15 [2025-01-09 04:14:26,921 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-01-09 04:14:26,922 INFO L471 AbstractCegarLoop]: Abstraction has 62 states and 71 transitions. [2025-01-09 04:14:26,922 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 15 states have (on average 1.2) internal successors, (18), 15 states have internal predecessors, (18), 6 states have call successors, (6), 5 states have call predecessors, (6), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2025-01-09 04:14:26,922 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 71 transitions. [2025-01-09 04:14:26,923 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2025-01-09 04:14:26,923 INFO L210 NwaCegarLoop]: Found error trace [2025-01-09 04:14:26,923 INFO L218 NwaCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-01-09 04:14:26,931 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2025-01-09 04:14:27,126 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 04:14:27,127 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-01-09 04:14:27,127 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-09 04:14:27,127 INFO L85 PathProgramCache]: Analyzing trace with hash -524204349, now seen corresponding path program 1 times [2025-01-09 04:14:27,127 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-09 04:14:27,128 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [623137728] [2025-01-09 04:14:27,128 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-09 04:14:27,128 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-09 04:14:27,142 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 21 statements into 1 equivalence classes. [2025-01-09 04:14:27,160 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 21 of 21 statements. [2025-01-09 04:14:27,161 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-09 04:14:27,161 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unknown [2025-01-09 04:14:27,164 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [29250160] [2025-01-09 04:14:27,164 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-09 04:14:27,164 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-09 04:14:27,164 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-09 04:14:27,166 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 04:14:27,169 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 04:14:27,223 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 21 statements into 1 equivalence classes. [2025-01-09 04:14:27,247 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 21 of 21 statements. [2025-01-09 04:14:27,247 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-09 04:14:27,247 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 04:14:27,249 INFO L256 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 35 conjuncts are in the unsatisfiable core [2025-01-09 04:14:27,251 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-09 04:14:27,261 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 11 treesize of output 7 [2025-01-09 04:14:27,265 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2025-01-09 04:14:27,454 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2025-01-09 04:14:27,455 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-01-09 04:14:27,663 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 04:14:27,663 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-09 04:14:27,663 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [623137728] [2025-01-09 04:14:27,663 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2025-01-09 04:14:27,664 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [29250160] [2025-01-09 04:14:27,664 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [29250160] provided 1 perfect and 1 imperfect interpolant sequences [2025-01-09 04:14:27,664 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2025-01-09 04:14:27,664 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [9] total 13 [2025-01-09 04:14:27,664 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1600240676] [2025-01-09 04:14:27,664 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-01-09 04:14:27,664 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2025-01-09 04:14:27,665 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-09 04:14:27,665 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2025-01-09 04:14:27,665 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2025-01-09 04:14:27,665 INFO L87 Difference]: Start difference. First operand 62 states and 71 transitions. Second operand has 8 states, 6 states have (on average 2.0) internal successors, (12), 6 states have internal predecessors, (12), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2025-01-09 04:14:28,073 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-01-09 04:14:28,073 INFO L93 Difference]: Finished difference Result 74 states and 83 transitions. [2025-01-09 04:14:28,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2025-01-09 04:14:28,075 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 6 states have (on average 2.0) internal successors, (12), 6 states have internal predecessors, (12), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 21 [2025-01-09 04:14:28,075 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-01-09 04:14:28,076 INFO L225 Difference]: With dead ends: 74 [2025-01-09 04:14:28,076 INFO L226 Difference]: Without dead ends: 72 [2025-01-09 04:14:28,076 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 24 SyntacticMatches, 5 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=44, Invalid=196, Unknown=0, NotChecked=0, Total=240 [2025-01-09 04:14:28,077 INFO L435 NwaCegarLoop]: 22 mSDtfsCounter, 17 mSDsluCounter, 85 mSDsCounter, 0 mSdLazyCounter, 116 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 107 SdHoareTripleChecker+Invalid, 125 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 116 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2025-01-09 04:14:28,077 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 107 Invalid, 125 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 116 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2025-01-09 04:14:28,078 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2025-01-09 04:14:28,093 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 70. [2025-01-09 04:14:28,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 45 states have (on average 1.0888888888888888) internal successors, (49), 47 states have internal predecessors, (49), 14 states have call successors, (14), 9 states have call predecessors, (14), 10 states have return successors, (14), 13 states have call predecessors, (14), 12 states have call successors, (14) [2025-01-09 04:14:28,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 77 transitions. [2025-01-09 04:14:28,094 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 77 transitions. Word has length 21 [2025-01-09 04:14:28,095 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-01-09 04:14:28,095 INFO L471 AbstractCegarLoop]: Abstraction has 70 states and 77 transitions. [2025-01-09 04:14:28,095 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 6 states have (on average 2.0) internal successors, (12), 6 states have internal predecessors, (12), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2025-01-09 04:14:28,095 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 77 transitions. [2025-01-09 04:14:28,096 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2025-01-09 04:14:28,096 INFO L210 NwaCegarLoop]: Found error trace [2025-01-09 04:14:28,096 INFO L218 NwaCegarLoop]: trace histogram [4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-01-09 04:14:28,104 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2025-01-09 04:14:28,296 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 04:14:28,297 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-01-09 04:14:28,297 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-09 04:14:28,297 INFO L85 PathProgramCache]: Analyzing trace with hash 966907610, now seen corresponding path program 1 times [2025-01-09 04:14:28,297 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-09 04:14:28,297 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [897558551] [2025-01-09 04:14:28,297 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-09 04:14:28,298 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-09 04:14:28,310 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 31 statements into 1 equivalence classes. [2025-01-09 04:14:28,331 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 31 of 31 statements. [2025-01-09 04:14:28,331 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-09 04:14:28,331 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 04:14:29,084 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2025-01-09 04:14:29,084 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-09 04:14:29,084 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [897558551] [2025-01-09 04:14:29,084 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [897558551] provided 0 perfect and 1 imperfect interpolant sequences [2025-01-09 04:14:29,084 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1242031867] [2025-01-09 04:14:29,084 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-09 04:14:29,084 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-09 04:14:29,084 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-09 04:14:29,088 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 04:14:29,089 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 04:14:29,142 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 31 statements into 1 equivalence classes. [2025-01-09 04:14:29,172 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 31 of 31 statements. [2025-01-09 04:14:29,173 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-09 04:14:29,173 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 04:14:29,174 INFO L256 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 44 conjuncts are in the unsatisfiable core [2025-01-09 04:14:29,178 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-09 04:14:29,373 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 33 treesize of output 21 [2025-01-09 04:14:29,377 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 33 treesize of output 21 [2025-01-09 04:14:29,407 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 04:14:29,414 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 04:14:29,463 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 5 proven. 12 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2025-01-09 04:14:29,463 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-01-09 04:14:33,888 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 7 proven. 8 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-01-09 04:14:33,888 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1242031867] provided 0 perfect and 2 imperfect interpolant sequences [2025-01-09 04:14:33,888 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-01-09 04:14:33,888 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 10] total 21 [2025-01-09 04:14:33,888 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1626125589] [2025-01-09 04:14:33,888 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-01-09 04:14:33,889 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2025-01-09 04:14:33,889 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-09 04:14:33,890 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2025-01-09 04:14:33,890 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=356, Unknown=1, NotChecked=0, Total=420 [2025-01-09 04:14:33,890 INFO L87 Difference]: Start difference. First operand 70 states and 77 transitions. Second operand has 21 states, 16 states have (on average 2.3125) internal successors, (37), 17 states have internal predecessors, (37), 9 states have call successors, (15), 7 states have call predecessors, (15), 4 states have return successors, (9), 2 states have call predecessors, (9), 4 states have call successors, (9) [2025-01-09 04:14:35,677 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-01-09 04:14:35,677 INFO L93 Difference]: Finished difference Result 92 states and 104 transitions. [2025-01-09 04:14:35,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2025-01-09 04:14:35,678 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 16 states have (on average 2.3125) internal successors, (37), 17 states have internal predecessors, (37), 9 states have call successors, (15), 7 states have call predecessors, (15), 4 states have return successors, (9), 2 states have call predecessors, (9), 4 states have call successors, (9) Word has length 31 [2025-01-09 04:14:35,678 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-01-09 04:14:35,679 INFO L225 Difference]: With dead ends: 92 [2025-01-09 04:14:35,679 INFO L226 Difference]: Without dead ends: 90 [2025-01-09 04:14:35,680 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 50 SyntacticMatches, 5 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 5.1s TimeCoverageRelationStatistics Valid=155, Invalid=774, Unknown=1, NotChecked=0, Total=930 [2025-01-09 04:14:35,680 INFO L435 NwaCegarLoop]: 22 mSDtfsCounter, 73 mSDsluCounter, 117 mSDsCounter, 0 mSdLazyCounter, 320 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 76 SdHoareTripleChecker+Valid, 139 SdHoareTripleChecker+Invalid, 358 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 320 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2025-01-09 04:14:35,681 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [76 Valid, 139 Invalid, 358 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 320 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2025-01-09 04:14:35,681 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2025-01-09 04:14:35,702 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 78. [2025-01-09 04:14:35,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 50 states have (on average 1.08) internal successors, (54), 53 states have internal predecessors, (54), 15 states have call successors, (15), 10 states have call predecessors, (15), 12 states have return successors, (19), 15 states have call predecessors, (19), 14 states have call successors, (19) [2025-01-09 04:14:35,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 88 transitions. [2025-01-09 04:14:35,704 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 88 transitions. Word has length 31 [2025-01-09 04:14:35,704 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-01-09 04:14:35,704 INFO L471 AbstractCegarLoop]: Abstraction has 78 states and 88 transitions. [2025-01-09 04:14:35,704 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 16 states have (on average 2.3125) internal successors, (37), 17 states have internal predecessors, (37), 9 states have call successors, (15), 7 states have call predecessors, (15), 4 states have return successors, (9), 2 states have call predecessors, (9), 4 states have call successors, (9) [2025-01-09 04:14:35,705 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 88 transitions. [2025-01-09 04:14:35,705 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2025-01-09 04:14:35,705 INFO L210 NwaCegarLoop]: Found error trace [2025-01-09 04:14:35,705 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] [2025-01-09 04:14:35,713 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2025-01-09 04:14:35,906 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 04:14:35,906 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-01-09 04:14:35,907 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-09 04:14:35,907 INFO L85 PathProgramCache]: Analyzing trace with hash -1870103408, now seen corresponding path program 1 times [2025-01-09 04:14:35,907 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-09 04:14:35,907 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1588915392] [2025-01-09 04:14:35,907 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-09 04:14:35,908 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-09 04:14:35,915 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 31 statements into 1 equivalence classes. [2025-01-09 04:14:35,923 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 31 of 31 statements. [2025-01-09 04:14:35,925 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-09 04:14:35,925 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 04:14:36,337 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 04:14:36,337 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-09 04:14:36,337 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1588915392] [2025-01-09 04:14:36,337 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1588915392] provided 1 perfect and 0 imperfect interpolant sequences [2025-01-09 04:14:36,337 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-01-09 04:14:36,337 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2025-01-09 04:14:36,338 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1340737489] [2025-01-09 04:14:36,338 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-01-09 04:14:36,338 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2025-01-09 04:14:36,338 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-09 04:14:36,338 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2025-01-09 04:14:36,338 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2025-01-09 04:14:36,339 INFO L87 Difference]: Start difference. First operand 78 states and 88 transitions. Second operand has 7 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 6 states have internal predecessors, (16), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2025-01-09 04:14:36,857 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-01-09 04:14:36,859 INFO L93 Difference]: Finished difference Result 89 states and 99 transitions. [2025-01-09 04:14:36,859 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2025-01-09 04:14:36,859 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 6 states have internal predecessors, (16), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 31 [2025-01-09 04:14:36,860 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-01-09 04:14:36,861 INFO L225 Difference]: With dead ends: 89 [2025-01-09 04:14:36,861 INFO L226 Difference]: Without dead ends: 87 [2025-01-09 04:14:36,861 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2025-01-09 04:14:36,861 INFO L435 NwaCegarLoop]: 17 mSDtfsCounter, 9 mSDsluCounter, 51 mSDsCounter, 0 mSdLazyCounter, 118 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 68 SdHoareTripleChecker+Invalid, 128 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 118 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2025-01-09 04:14:36,862 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 68 Invalid, 128 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 118 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2025-01-09 04:14:36,862 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2025-01-09 04:14:36,893 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 86. [2025-01-09 04:14:36,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 55 states have (on average 1.0727272727272728) internal successors, (59), 58 states have internal predecessors, (59), 16 states have call successors, (16), 11 states have call predecessors, (16), 14 states have return successors, (21), 16 states have call predecessors, (21), 15 states have call successors, (21) [2025-01-09 04:14:36,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 96 transitions. [2025-01-09 04:14:36,896 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 96 transitions. Word has length 31 [2025-01-09 04:14:36,896 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-01-09 04:14:36,896 INFO L471 AbstractCegarLoop]: Abstraction has 86 states and 96 transitions. [2025-01-09 04:14:36,896 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 6 states have internal predecessors, (16), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2025-01-09 04:14:36,896 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 96 transitions. [2025-01-09 04:14:36,897 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2025-01-09 04:14:36,897 INFO L210 NwaCegarLoop]: Found error trace [2025-01-09 04:14:36,898 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] [2025-01-09 04:14:36,898 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2025-01-09 04:14:36,898 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-01-09 04:14:36,899 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-09 04:14:36,899 INFO L85 PathProgramCache]: Analyzing trace with hash -1074355171, now seen corresponding path program 1 times [2025-01-09 04:14:36,899 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-09 04:14:36,899 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [331232442] [2025-01-09 04:14:36,899 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-09 04:14:36,899 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-09 04:14:36,909 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 37 statements into 1 equivalence classes. [2025-01-09 04:14:36,928 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 37 of 37 statements. [2025-01-09 04:14:36,928 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-09 04:14:36,928 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unknown [2025-01-09 04:14:36,930 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [345899438] [2025-01-09 04:14:36,930 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-09 04:14:36,930 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-09 04:14:36,930 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-09 04:14:36,932 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 04:14:36,934 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 04:14:36,984 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 37 statements into 1 equivalence classes. [2025-01-09 04:14:37,010 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 37 of 37 statements. [2025-01-09 04:14:37,010 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-09 04:14:37,010 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 04:14:37,012 INFO L256 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 17 conjuncts are in the unsatisfiable core [2025-01-09 04:14:37,015 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-09 04:14:37,028 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 04:14:37,049 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 04:14:37,562 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 18 proven. 2 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2025-01-09 04:14:37,562 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-01-09 04:14:38,045 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-09 04:14:38,045 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [331232442] [2025-01-09 04:14:38,045 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2025-01-09 04:14:38,045 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [345899438] [2025-01-09 04:14:38,045 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [345899438] provided 0 perfect and 1 imperfect interpolant sequences [2025-01-09 04:14:38,045 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2025-01-09 04:14:38,045 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2025-01-09 04:14:38,046 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1632225109] [2025-01-09 04:14:38,046 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2025-01-09 04:14:38,046 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2025-01-09 04:14:38,046 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-09 04:14:38,046 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2025-01-09 04:14:38,046 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2025-01-09 04:14:38,047 INFO L87 Difference]: Start difference. First operand 86 states and 96 transitions. Second operand has 8 states, 7 states have (on average 2.857142857142857) internal successors, (20), 7 states have internal predecessors, (20), 3 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2025-01-09 04:14:38,725 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-01-09 04:14:38,725 INFO L93 Difference]: Finished difference Result 102 states and 111 transitions. [2025-01-09 04:14:38,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2025-01-09 04:14:38,726 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.857142857142857) internal successors, (20), 7 states have internal predecessors, (20), 3 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 37 [2025-01-09 04:14:38,726 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-01-09 04:14:38,727 INFO L225 Difference]: With dead ends: 102 [2025-01-09 04:14:38,727 INFO L226 Difference]: Without dead ends: 98 [2025-01-09 04:14:38,727 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 43 SyntacticMatches, 3 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2025-01-09 04:14:38,728 INFO L435 NwaCegarLoop]: 14 mSDtfsCounter, 25 mSDsluCounter, 49 mSDsCounter, 0 mSdLazyCounter, 145 mSolverCounterSat, 23 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 63 SdHoareTripleChecker+Invalid, 170 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 145 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2025-01-09 04:14:38,728 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [25 Valid, 63 Invalid, 170 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 145 Invalid, 2 Unknown, 0 Unchecked, 0.5s Time] [2025-01-09 04:14:38,729 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2025-01-09 04:14:38,750 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 96. [2025-01-09 04:14:38,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 62 states have (on average 1.064516129032258) internal successors, (66), 64 states have internal predecessors, (66), 18 states have call successors, (18), 13 states have call predecessors, (18), 15 states have return successors, (22), 18 states have call predecessors, (22), 16 states have call successors, (22) [2025-01-09 04:14:38,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 106 transitions. [2025-01-09 04:14:38,752 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 106 transitions. Word has length 37 [2025-01-09 04:14:38,752 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-01-09 04:14:38,752 INFO L471 AbstractCegarLoop]: Abstraction has 96 states and 106 transitions. [2025-01-09 04:14:38,752 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 2.857142857142857) internal successors, (20), 7 states have internal predecessors, (20), 3 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2025-01-09 04:14:38,753 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 106 transitions. [2025-01-09 04:14:38,753 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2025-01-09 04:14:38,754 INFO L210 NwaCegarLoop]: Found error trace [2025-01-09 04:14:38,754 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] [2025-01-09 04:14:38,761 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2025-01-09 04:14:38,954 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2025-01-09 04:14:38,954 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-01-09 04:14:38,955 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-09 04:14:38,955 INFO L85 PathProgramCache]: Analyzing trace with hash 1581315816, now seen corresponding path program 1 times [2025-01-09 04:14:38,955 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-09 04:14:38,955 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [368074739] [2025-01-09 04:14:38,955 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-09 04:14:38,955 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-09 04:14:38,961 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 43 statements into 1 equivalence classes. [2025-01-09 04:14:38,973 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 43 of 43 statements. [2025-01-09 04:14:38,974 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-09 04:14:38,974 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unknown [2025-01-09 04:14:38,975 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [262171553] [2025-01-09 04:14:38,975 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-09 04:14:38,975 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-09 04:14:38,975 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-09 04:14:38,979 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 04:14:38,980 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 04:14:39,034 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 43 statements into 1 equivalence classes. [2025-01-09 04:14:39,066 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 43 of 43 statements. [2025-01-09 04:14:39,067 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-09 04:14:39,067 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 04:14:39,072 INFO L256 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 19 conjuncts are in the unsatisfiable core [2025-01-09 04:14:39,075 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-09 04:14:39,091 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 04:14:39,115 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 04:14:39,900 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 30 proven. 4 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2025-01-09 04:14:39,900 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-01-09 04:14:40,527 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-09 04:14:40,527 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [368074739] [2025-01-09 04:14:40,527 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2025-01-09 04:14:40,527 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [262171553] [2025-01-09 04:14:40,527 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [262171553] provided 0 perfect and 1 imperfect interpolant sequences [2025-01-09 04:14:40,528 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2025-01-09 04:14:40,528 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2025-01-09 04:14:40,528 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1872068667] [2025-01-09 04:14:40,528 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2025-01-09 04:14:40,528 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2025-01-09 04:14:40,528 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-09 04:14:40,529 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2025-01-09 04:14:40,529 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2025-01-09 04:14:40,529 INFO L87 Difference]: Start difference. First operand 96 states and 106 transitions. Second operand has 8 states, 7 states have (on average 3.0) internal successors, (21), 7 states have internal predecessors, (21), 3 states have call successors, (7), 4 states have call predecessors, (7), 3 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2025-01-09 04:14:41,330 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-01-09 04:14:41,330 INFO L93 Difference]: Finished difference Result 98 states and 107 transitions. [2025-01-09 04:14:41,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2025-01-09 04:14:41,331 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.0) internal successors, (21), 7 states have internal predecessors, (21), 3 states have call successors, (7), 4 states have call predecessors, (7), 3 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 43 [2025-01-09 04:14:41,331 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-01-09 04:14:41,332 INFO L225 Difference]: With dead ends: 98 [2025-01-09 04:14:41,332 INFO L226 Difference]: Without dead ends: 78 [2025-01-09 04:14:41,332 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 52 SyntacticMatches, 5 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2025-01-09 04:14:41,333 INFO L435 NwaCegarLoop]: 14 mSDtfsCounter, 17 mSDsluCounter, 51 mSDsCounter, 0 mSdLazyCounter, 143 mSolverCounterSat, 21 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 65 SdHoareTripleChecker+Invalid, 165 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 143 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2025-01-09 04:14:41,333 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 65 Invalid, 165 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 143 Invalid, 1 Unknown, 0 Unchecked, 0.6s Time] [2025-01-09 04:14:41,334 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2025-01-09 04:14:41,349 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 78. [2025-01-09 04:14:41,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 50 states have (on average 1.06) internal successors, (53), 52 states have internal predecessors, (53), 15 states have call successors, (15), 10 states have call predecessors, (15), 12 states have return successors, (19), 15 states have call predecessors, (19), 14 states have call successors, (19) [2025-01-09 04:14:41,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 87 transitions. [2025-01-09 04:14:41,351 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 87 transitions. Word has length 43 [2025-01-09 04:14:41,351 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-01-09 04:14:41,351 INFO L471 AbstractCegarLoop]: Abstraction has 78 states and 87 transitions. [2025-01-09 04:14:41,351 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 3.0) internal successors, (21), 7 states have internal predecessors, (21), 3 states have call successors, (7), 4 states have call predecessors, (7), 3 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2025-01-09 04:14:41,351 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 87 transitions. [2025-01-09 04:14:41,352 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2025-01-09 04:14:41,352 INFO L210 NwaCegarLoop]: Found error trace [2025-01-09 04:14:41,352 INFO L218 NwaCegarLoop]: trace histogram [7, 6, 6, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-01-09 04:14:41,360 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2025-01-09 04:14:41,557 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-09 04:14:41,557 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-01-09 04:14:41,557 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-09 04:14:41,557 INFO L85 PathProgramCache]: Analyzing trace with hash 697696318, now seen corresponding path program 1 times [2025-01-09 04:14:41,557 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-09 04:14:41,557 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1745365504] [2025-01-09 04:14:41,558 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-09 04:14:41,558 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-09 04:14:41,564 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 55 statements into 1 equivalence classes. [2025-01-09 04:14:41,575 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 55 of 55 statements. [2025-01-09 04:14:41,575 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-09 04:14:41,575 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 04:14:43,387 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 12 proven. 10 refuted. 0 times theorem prover too weak. 61 trivial. 0 not checked. [2025-01-09 04:14:43,388 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-09 04:14:43,388 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1745365504] [2025-01-09 04:14:43,388 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1745365504] provided 0 perfect and 1 imperfect interpolant sequences [2025-01-09 04:14:43,388 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [931829465] [2025-01-09 04:14:43,388 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-09 04:14:43,388 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-09 04:14:43,388 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-09 04:14:43,390 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 04:14:43,391 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 04:14:43,439 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 55 statements into 1 equivalence classes. [2025-01-09 04:14:43,482 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 55 of 55 statements. [2025-01-09 04:14:43,482 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-09 04:14:43,482 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 04:14:43,488 INFO L256 TraceCheckSpWp]: Trace formula consists of 286 conjuncts, 44 conjuncts are in the unsatisfiable core [2025-01-09 04:14:43,493 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-09 04:14:44,756 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 33 treesize of output 21 [2025-01-09 04:14:44,767 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 33 treesize of output 21 [2025-01-09 04:14:45,179 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 04:14:45,184 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 04:14:45,383 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 10 proven. 54 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2025-01-09 04:14:45,383 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-01-09 04:14:46,153 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [931829465] provided 0 perfect and 1 imperfect interpolant sequences [2025-01-09 04:14:46,153 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2025-01-09 04:14:46,153 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 24 [2025-01-09 04:14:46,153 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1890486694] [2025-01-09 04:14:46,154 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2025-01-09 04:14:46,154 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2025-01-09 04:14:46,154 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-09 04:14:46,155 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2025-01-09 04:14:46,155 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=533, Unknown=0, NotChecked=0, Total=600 [2025-01-09 04:14:46,155 INFO L87 Difference]: Start difference. First operand 78 states and 87 transitions. Second operand has 24 states, 18 states have (on average 2.611111111111111) internal successors, (47), 21 states have internal predecessors, (47), 12 states have call successors, (18), 5 states have call predecessors, (18), 7 states have return successors, (16), 9 states have call predecessors, (16), 10 states have call successors, (16) [2025-01-09 04:14:48,490 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-01-09 04:14:48,490 INFO L93 Difference]: Finished difference Result 87 states and 96 transitions. [2025-01-09 04:14:48,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2025-01-09 04:14:48,491 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 18 states have (on average 2.611111111111111) internal successors, (47), 21 states have internal predecessors, (47), 12 states have call successors, (18), 5 states have call predecessors, (18), 7 states have return successors, (16), 9 states have call predecessors, (16), 10 states have call successors, (16) Word has length 55 [2025-01-09 04:14:48,491 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-01-09 04:14:48,492 INFO L225 Difference]: With dead ends: 87 [2025-01-09 04:14:48,492 INFO L226 Difference]: Without dead ends: 85 [2025-01-09 04:14:48,493 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 58 SyntacticMatches, 5 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 235 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=186, Invalid=1146, Unknown=0, NotChecked=0, Total=1332 [2025-01-09 04:14:48,493 INFO L435 NwaCegarLoop]: 14 mSDtfsCounter, 39 mSDsluCounter, 94 mSDsCounter, 0 mSdLazyCounter, 395 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 108 SdHoareTripleChecker+Invalid, 428 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 395 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2025-01-09 04:14:48,493 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [40 Valid, 108 Invalid, 428 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 395 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2025-01-09 04:14:48,494 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2025-01-09 04:14:48,517 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 82. [2025-01-09 04:14:48,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 53 states have (on average 1.0566037735849056) internal successors, (56), 55 states have internal predecessors, (56), 15 states have call successors, (15), 11 states have call predecessors, (15), 13 states have return successors, (19), 15 states have call predecessors, (19), 14 states have call successors, (19) [2025-01-09 04:14:48,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 90 transitions. [2025-01-09 04:14:48,519 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 90 transitions. Word has length 55 [2025-01-09 04:14:48,519 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-01-09 04:14:48,519 INFO L471 AbstractCegarLoop]: Abstraction has 82 states and 90 transitions. [2025-01-09 04:14:48,520 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 18 states have (on average 2.611111111111111) internal successors, (47), 21 states have internal predecessors, (47), 12 states have call successors, (18), 5 states have call predecessors, (18), 7 states have return successors, (16), 9 states have call predecessors, (16), 10 states have call successors, (16) [2025-01-09 04:14:48,520 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 90 transitions. [2025-01-09 04:14:48,521 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2025-01-09 04:14:48,521 INFO L210 NwaCegarLoop]: Found error trace [2025-01-09 04:14:48,521 INFO L218 NwaCegarLoop]: trace histogram [8, 7, 7, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-01-09 04:14:48,528 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2025-01-09 04:14:48,722 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 04:14:48,722 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-01-09 04:14:48,723 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-09 04:14:48,723 INFO L85 PathProgramCache]: Analyzing trace with hash 1611803979, now seen corresponding path program 1 times [2025-01-09 04:14:48,723 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-09 04:14:48,723 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [628795088] [2025-01-09 04:14:48,723 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-09 04:14:48,723 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-09 04:14:48,730 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 61 statements into 1 equivalence classes. [2025-01-09 04:14:48,751 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 61 of 61 statements. [2025-01-09 04:14:48,751 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-09 04:14:48,751 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unknown [2025-01-09 04:14:48,753 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [507093767] [2025-01-09 04:14:48,753 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-09 04:14:48,753 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-09 04:14:48,753 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-09 04:14:48,755 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 04:14:48,762 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 04:14:48,820 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 61 statements into 1 equivalence classes. [2025-01-09 04:14:48,862 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 61 of 61 statements. [2025-01-09 04:14:48,862 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-09 04:14:48,863 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 04:14:48,867 INFO L256 TraceCheckSpWp]: Trace formula consists of 301 conjuncts, 93 conjuncts are in the unsatisfiable core [2025-01-09 04:14:48,870 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-09 04:14:48,887 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 04:14:48,908 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 04:14:48,927 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 04:14:54,142 WARN L873 $PredicateComparison]: unable to prove that (exists ((|v_func_to_recursive_line_29_to_40_0_#in~s.base_BEFORE_CALL_7| Int) (|v_func_to_recursive_line_29_to_40_0_#in~s.offset_BEFORE_CALL_7| Int) (|v_func_to_recursive_line_29_to_40_0_#in~a.offset_BEFORE_CALL_12| Int) (|v_func_to_recursive_line_29_to_40_0_#in~a.base_BEFORE_CALL_12| Int)) (<= (select (select |c_#memory_int#2| |v_func_to_recursive_line_29_to_40_0_#in~s.base_BEFORE_CALL_7|) |v_func_to_recursive_line_29_to_40_0_#in~s.offset_BEFORE_CALL_7|) (let ((.cse0 (select (select |c_#memory_int#3| |v_func_to_recursive_line_29_to_40_0_#in~a.base_BEFORE_CALL_12|) |v_func_to_recursive_line_29_to_40_0_#in~a.offset_BEFORE_CALL_12|))) (+ (* .cse0 2) (* .cse0 .cse0) 1)))) is different from true [2025-01-09 04:14:54,592 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 04:14:54,734 INFO L349 Elim1Store]: treesize reduction 14, result has 58.8 percent of original size [2025-01-09 04:14:54,734 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 38 treesize of output 41 [2025-01-09 04:14:54,822 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 23 treesize of output 3 [2025-01-09 04:14:55,149 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-01-09 04:14:55,150 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 66 treesize of output 70 [2025-01-09 04:14:55,965 INFO L134 CoverageAnalysis]: Checked inductivity of 109 backedges. 58 proven. 13 refuted. 0 times theorem prover too weak. 29 trivial. 9 not checked. [2025-01-09 04:14:55,965 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-01-09 04:15:02,235 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-09 04:15:02,235 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [628795088] [2025-01-09 04:15:02,235 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2025-01-09 04:15:02,235 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [507093767] [2025-01-09 04:15:02,236 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [507093767] provided 0 perfect and 1 imperfect interpolant sequences [2025-01-09 04:15:02,236 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2025-01-09 04:15:02,236 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2025-01-09 04:15:02,236 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [978945065] [2025-01-09 04:15:02,236 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2025-01-09 04:15:02,236 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2025-01-09 04:15:02,236 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-09 04:15:02,237 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2025-01-09 04:15:02,237 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=668, Unknown=2, NotChecked=52, Total=812 [2025-01-09 04:15:02,237 INFO L87 Difference]: Start difference. First operand 82 states and 90 transitions. Second operand has 22 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 17 states have internal predecessors, (33), 8 states have call successors, (10), 5 states have call predecessors, (10), 6 states have return successors, (9), 6 states have call predecessors, (9), 7 states have call successors, (9) [2025-01-09 04:15:06,637 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-01-09 04:15:06,638 INFO L93 Difference]: Finished difference Result 104 states and 111 transitions. [2025-01-09 04:15:06,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2025-01-09 04:15:06,638 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 17 states have internal predecessors, (33), 8 states have call successors, (10), 5 states have call predecessors, (10), 6 states have return successors, (9), 6 states have call predecessors, (9), 7 states have call successors, (9) Word has length 61 [2025-01-09 04:15:06,638 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-01-09 04:15:06,639 INFO L225 Difference]: With dead ends: 104 [2025-01-09 04:15:06,639 INFO L226 Difference]: Without dead ends: 100 [2025-01-09 04:15:06,640 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 43 SyntacticMatches, 3 SemanticMatches, 44 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 368 ImplicationChecksByTransitivity, 12.4s TimeCoverageRelationStatistics Valid=234, Invalid=1748, Unknown=2, NotChecked=86, Total=2070 [2025-01-09 04:15:06,640 INFO L435 NwaCegarLoop]: 13 mSDtfsCounter, 24 mSDsluCounter, 73 mSDsCounter, 0 mSdLazyCounter, 572 mSolverCounterSat, 22 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 86 SdHoareTripleChecker+Invalid, 657 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 572 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 60 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2025-01-09 04:15:06,640 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [24 Valid, 86 Invalid, 657 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 572 Invalid, 3 Unknown, 60 Unchecked, 2.2s Time] [2025-01-09 04:15:06,641 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2025-01-09 04:15:06,671 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 98. [2025-01-09 04:15:06,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98 states, 64 states have (on average 1.046875) internal successors, (67), 65 states have internal predecessors, (67), 18 states have call successors, (18), 14 states have call predecessors, (18), 15 states have return successors, (21), 18 states have call predecessors, (21), 16 states have call successors, (21) [2025-01-09 04:15:06,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 106 transitions. [2025-01-09 04:15:06,672 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 106 transitions. Word has length 61 [2025-01-09 04:15:06,673 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-01-09 04:15:06,673 INFO L471 AbstractCegarLoop]: Abstraction has 98 states and 106 transitions. [2025-01-09 04:15:06,673 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 17 states have internal predecessors, (33), 8 states have call successors, (10), 5 states have call predecessors, (10), 6 states have return successors, (9), 6 states have call predecessors, (9), 7 states have call successors, (9) [2025-01-09 04:15:06,673 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 106 transitions. [2025-01-09 04:15:06,675 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2025-01-09 04:15:06,676 INFO L210 NwaCegarLoop]: Found error trace [2025-01-09 04:15:06,676 INFO L218 NwaCegarLoop]: trace histogram [9, 8, 8, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-01-09 04:15:06,686 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2025-01-09 04:15:06,877 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 04:15:06,877 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-01-09 04:15:06,877 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-09 04:15:06,877 INFO L85 PathProgramCache]: Analyzing trace with hash -181377642, now seen corresponding path program 1 times [2025-01-09 04:15:06,877 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-09 04:15:06,877 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1583815190] [2025-01-09 04:15:06,877 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-09 04:15:06,877 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-09 04:15:06,888 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 67 statements into 1 equivalence classes. [2025-01-09 04:15:06,912 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 67 of 67 statements. [2025-01-09 04:15:06,912 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-09 04:15:06,912 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unknown [2025-01-09 04:15:06,913 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [426250362] [2025-01-09 04:15:06,913 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-09 04:15:06,913 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-09 04:15:06,914 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-09 04:15:06,916 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 04:15:06,918 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 04:15:06,993 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 67 statements into 1 equivalence classes. [2025-01-09 04:15:07,038 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 67 of 67 statements. [2025-01-09 04:15:07,038 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-09 04:15:07,038 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 04:15:07,040 INFO L256 TraceCheckSpWp]: Trace formula consists of 318 conjuncts, 87 conjuncts are in the unsatisfiable core [2025-01-09 04:15:07,044 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-09 04:15:07,059 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 04:15:07,081 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 04:15:08,494 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 33 treesize of output 21 [2025-01-09 04:15:09,032 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 04:15:09,047 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 04:15:10,212 INFO L134 CoverageAnalysis]: Checked inductivity of 139 backedges. 39 proven. 80 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2025-01-09 04:15:10,213 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-01-09 04:15:16,522 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2025-01-09 04:15:17,688 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 37 [2025-01-09 04:15:17,701 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 37 treesize of output 21 [2025-01-09 04:15:18,569 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-09 04:15:18,569 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1583815190] [2025-01-09 04:15:18,569 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2025-01-09 04:15:18,569 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [426250362] [2025-01-09 04:15:18,569 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [426250362] provided 0 perfect and 1 imperfect interpolant sequences [2025-01-09 04:15:18,569 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2025-01-09 04:15:18,569 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2025-01-09 04:15:18,569 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [44301435] [2025-01-09 04:15:18,569 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2025-01-09 04:15:18,569 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2025-01-09 04:15:18,569 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-09 04:15:18,570 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2025-01-09 04:15:18,570 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=810, Unknown=1, NotChecked=0, Total=930 [2025-01-09 04:15:18,570 INFO L87 Difference]: Start difference. First operand 98 states and 106 transitions. Second operand has 22 states, 17 states have (on average 2.176470588235294) internal successors, (37), 19 states have internal predecessors, (37), 8 states have call successors, (11), 6 states have call predecessors, (11), 7 states have return successors, (10), 5 states have call predecessors, (10), 7 states have call successors, (10) [2025-01-09 04:15:22,268 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-01-09 04:15:22,268 INFO L93 Difference]: Finished difference Result 100 states and 107 transitions. [2025-01-09 04:15:22,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2025-01-09 04:15:22,269 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 17 states have (on average 2.176470588235294) internal successors, (37), 19 states have internal predecessors, (37), 8 states have call successors, (11), 6 states have call predecessors, (11), 7 states have return successors, (10), 5 states have call predecessors, (10), 7 states have call successors, (10) Word has length 67 [2025-01-09 04:15:22,269 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-01-09 04:15:22,270 INFO L225 Difference]: With dead ends: 100 [2025-01-09 04:15:22,270 INFO L226 Difference]: Without dead ends: 78 [2025-01-09 04:15:22,271 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 59 SyntacticMatches, 6 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 527 ImplicationChecksByTransitivity, 9.9s TimeCoverageRelationStatistics Valid=306, Invalid=1855, Unknown=1, NotChecked=0, Total=2162 [2025-01-09 04:15:22,271 INFO L435 NwaCegarLoop]: 14 mSDtfsCounter, 31 mSDsluCounter, 65 mSDsCounter, 0 mSdLazyCounter, 369 mSolverCounterSat, 29 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 79 SdHoareTripleChecker+Invalid, 402 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 369 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2025-01-09 04:15:22,271 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [33 Valid, 79 Invalid, 402 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 369 Invalid, 4 Unknown, 0 Unchecked, 1.5s Time] [2025-01-09 04:15:22,272 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2025-01-09 04:15:22,288 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 78. [2025-01-09 04:15:22,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 51 states have (on average 1.0392156862745099) internal successors, (53), 52 states have internal predecessors, (53), 15 states have call successors, (15), 11 states have call predecessors, (15), 11 states have return successors, (17), 14 states have call predecessors, (17), 14 states have call successors, (17) [2025-01-09 04:15:22,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 85 transitions. [2025-01-09 04:15:22,289 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 85 transitions. Word has length 67 [2025-01-09 04:15:22,290 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-01-09 04:15:22,290 INFO L471 AbstractCegarLoop]: Abstraction has 78 states and 85 transitions. [2025-01-09 04:15:22,290 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 17 states have (on average 2.176470588235294) internal successors, (37), 19 states have internal predecessors, (37), 8 states have call successors, (11), 6 states have call predecessors, (11), 7 states have return successors, (10), 5 states have call predecessors, (10), 7 states have call successors, (10) [2025-01-09 04:15:22,290 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 85 transitions. [2025-01-09 04:15:22,291 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2025-01-09 04:15:22,291 INFO L210 NwaCegarLoop]: Found error trace [2025-01-09 04:15:22,291 INFO L218 NwaCegarLoop]: trace histogram [11, 10, 10, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-01-09 04:15:22,299 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 04:15:22,491 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 04:15:22,492 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-01-09 04:15:22,492 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-09 04:15:22,492 INFO L85 PathProgramCache]: Analyzing trace with hash -1611807239, now seen corresponding path program 2 times [2025-01-09 04:15:22,492 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-09 04:15:22,492 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [662747964] [2025-01-09 04:15:22,492 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-01-09 04:15:22,492 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-09 04:15:22,504 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 85 statements into 2 equivalence classes. [2025-01-09 04:15:22,536 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 85 of 85 statements. [2025-01-09 04:15:22,536 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-01-09 04:15:22,536 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unknown [2025-01-09 04:15:22,539 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [784428618] [2025-01-09 04:15:22,539 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-01-09 04:15:22,539 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-09 04:15:22,540 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-09 04:15:22,542 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 04:15:22,544 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 04:15:22,624 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 85 statements into 2 equivalence classes. [2025-01-09 04:15:22,690 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 85 of 85 statements. [2025-01-09 04:15:22,690 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-01-09 04:15:22,690 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 04:15:22,698 INFO L256 TraceCheckSpWp]: Trace formula consists of 403 conjuncts, 142 conjuncts are in the unsatisfiable core [2025-01-09 04:15:22,704 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-09 04:15:22,715 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 04:15:22,731 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 04:15:27,979 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 34 treesize of output 26 [2025-01-09 04:15:33,523 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 33 treesize of output 21 [2025-01-09 04:15:38,629 WARN L873 $PredicateComparison]: unable to prove that (exists ((|v_func_to_recursive_line_29_to_40_0_#in~a.base_BEFORE_CALL_28| Int) (|v_func_to_recursive_line_29_to_40_0_#in~s.base_BEFORE_CALL_23| Int) (|v_func_to_recursive_line_29_to_40_0_#in~a.offset_BEFORE_CALL_28| Int) (|v_func_to_recursive_line_29_to_40_0_#in~s.offset_BEFORE_CALL_23| Int)) (<= (select (select |c_#memory_int#2| |v_func_to_recursive_line_29_to_40_0_#in~s.base_BEFORE_CALL_23|) |v_func_to_recursive_line_29_to_40_0_#in~s.offset_BEFORE_CALL_23|) (let ((.cse0 (select (select |c_#memory_int#3| |v_func_to_recursive_line_29_to_40_0_#in~a.base_BEFORE_CALL_28|) |v_func_to_recursive_line_29_to_40_0_#in~a.offset_BEFORE_CALL_28|))) (+ (* .cse0 .cse0) (* 2 .cse0) 1)))) is different from true [2025-01-09 04:15:38,882 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 25 [2025-01-09 04:15:47,411 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 04:15:47,430 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 23 treesize of output 3