./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/array-examples/standard_partial_init_ground.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 551b0097 Calling Ultimate with: /root/.sdkman/candidates/java/21.0.5-tem/bin/java -Dosgi.configuration.area=/storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.6.800.v20240513-1750.jar -data @noDefault -ultimatedata /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/array-examples/standard_partial_init_ground.i -s /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 59d5175089b9a27cfba8f910bda680bc8b61a004048e68040b8cf993cc9cd888 --- Real Ultimate output --- This is Ultimate 0.3.0-?-551b009-m [2025-01-08 22:07:37,317 INFO L188 SettingsManager]: Resetting all preferences to default values... [2025-01-08 22:07:37,369 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2025-01-08 22:07:37,375 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2025-01-08 22:07:37,378 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2025-01-08 22:07:37,398 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2025-01-08 22:07:37,399 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2025-01-08 22:07:37,399 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2025-01-08 22:07:37,399 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2025-01-08 22:07:37,400 INFO L153 SettingsManager]: * Use memory slicer=true [2025-01-08 22:07:37,400 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2025-01-08 22:07:37,400 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2025-01-08 22:07:37,401 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2025-01-08 22:07:37,401 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2025-01-08 22:07:37,401 INFO L153 SettingsManager]: * Use SBE=true [2025-01-08 22:07:37,401 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2025-01-08 22:07:37,401 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2025-01-08 22:07:37,402 INFO L153 SettingsManager]: * sizeof long=4 [2025-01-08 22:07:37,402 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2025-01-08 22:07:37,402 INFO L153 SettingsManager]: * sizeof POINTER=4 [2025-01-08 22:07:37,402 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2025-01-08 22:07:37,402 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2025-01-08 22:07:37,402 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2025-01-08 22:07:37,402 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2025-01-08 22:07:37,402 INFO L153 SettingsManager]: * sizeof long double=12 [2025-01-08 22:07:37,402 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2025-01-08 22:07:37,402 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2025-01-08 22:07:37,402 INFO L153 SettingsManager]: * Use constant arrays=true [2025-01-08 22:07:37,402 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2025-01-08 22:07:37,402 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2025-01-08 22:07:37,403 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2025-01-08 22:07:37,403 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2025-01-08 22:07:37,403 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-01-08 22:07:37,403 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2025-01-08 22:07:37,403 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2025-01-08 22:07:37,403 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2025-01-08 22:07:37,403 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2025-01-08 22:07:37,403 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-01-08 22:07:37,403 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2025-01-08 22:07:37,404 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2025-01-08 22:07:37,404 INFO L153 SettingsManager]: * Compute procedure contracts=false [2025-01-08 22:07:37,404 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2025-01-08 22:07:37,404 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2025-01-08 22:07:37,404 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2025-01-08 22:07:37,404 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2025-01-08 22:07:37,404 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2025-01-08 22:07:37,404 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2025-01-08 22:07:37,404 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2025-01-08 22:07:37,404 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 -> 59d5175089b9a27cfba8f910bda680bc8b61a004048e68040b8cf993cc9cd888 [2025-01-08 22:07:37,645 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2025-01-08 22:07:37,650 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2025-01-08 22:07:37,652 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2025-01-08 22:07:37,652 INFO L270 PluginConnector]: Initializing CDTParser... [2025-01-08 22:07:37,652 INFO L274 PluginConnector]: CDTParser initialized [2025-01-08 22:07:37,653 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-examples/standard_partial_init_ground.i [2025-01-08 22:07:38,783 INFO L533 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/35a313e30/e499b86a238d46e29eb16798b1a86707/FLAGf9d4e524d [2025-01-08 22:07:39,051 INFO L384 CDTParser]: Found 1 translation units. [2025-01-08 22:07:39,051 INFO L180 CDTParser]: Scanning /storage/repos/ultimate-jdk21/releaseScripts/default/sv-benchmarks/c/array-examples/standard_partial_init_ground.i [2025-01-08 22:07:39,057 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/35a313e30/e499b86a238d46e29eb16798b1a86707/FLAGf9d4e524d [2025-01-08 22:07:39,357 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/35a313e30/e499b86a238d46e29eb16798b1a86707 [2025-01-08 22:07:39,358 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2025-01-08 22:07:39,359 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2025-01-08 22:07:39,360 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2025-01-08 22:07:39,360 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2025-01-08 22:07:39,363 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2025-01-08 22:07:39,364 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 08.01 10:07:39" (1/1) ... [2025-01-08 22:07:39,365 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@29eb79d6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.01 10:07:39, skipping insertion in model container [2025-01-08 22:07:39,365 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 08.01 10:07:39" (1/1) ... [2025-01-08 22:07:39,374 INFO L175 MainTranslator]: Built tables and reachable declarations [2025-01-08 22:07:39,474 WARN L250 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate-jdk21/releaseScripts/default/sv-benchmarks/c/array-examples/standard_partial_init_ground.i[821,834] [2025-01-08 22:07:39,484 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-01-08 22:07:39,490 INFO L200 MainTranslator]: Completed pre-run [2025-01-08 22:07:39,497 WARN L250 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate-jdk21/releaseScripts/default/sv-benchmarks/c/array-examples/standard_partial_init_ground.i[821,834] [2025-01-08 22:07:39,501 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-01-08 22:07:39,522 INFO L204 MainTranslator]: Completed translation [2025-01-08 22:07:39,522 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.01 10:07:39 WrapperNode [2025-01-08 22:07:39,523 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2025-01-08 22:07:39,523 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2025-01-08 22:07:39,523 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2025-01-08 22:07:39,524 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2025-01-08 22:07:39,532 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.01 10:07:39" (1/1) ... [2025-01-08 22:07:39,540 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.01 10:07:39" (1/1) ... [2025-01-08 22:07:39,558 INFO L138 Inliner]: procedures = 16, calls = 24, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 71 [2025-01-08 22:07:39,559 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2025-01-08 22:07:39,559 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2025-01-08 22:07:39,559 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2025-01-08 22:07:39,559 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2025-01-08 22:07:39,564 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.01 10:07:39" (1/1) ... [2025-01-08 22:07:39,564 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.01 10:07:39" (1/1) ... [2025-01-08 22:07:39,565 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.01 10:07:39" (1/1) ... [2025-01-08 22:07:39,575 INFO L175 MemorySlicer]: Split 9 memory accesses to 4 slices as follows [2, 3, 2, 2]. 33 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0, 0, 0]. The 3 writes are split as follows [0, 1, 1, 1]. [2025-01-08 22:07:39,576 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.01 10:07:39" (1/1) ... [2025-01-08 22:07:39,576 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.01 10:07:39" (1/1) ... [2025-01-08 22:07:39,583 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.01 10:07:39" (1/1) ... [2025-01-08 22:07:39,584 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.01 10:07:39" (1/1) ... [2025-01-08 22:07:39,589 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.01 10:07:39" (1/1) ... [2025-01-08 22:07:39,589 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.01 10:07:39" (1/1) ... [2025-01-08 22:07:39,590 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.01 10:07:39" (1/1) ... [2025-01-08 22:07:39,591 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2025-01-08 22:07:39,592 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2025-01-08 22:07:39,592 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2025-01-08 22:07:39,592 INFO L274 PluginConnector]: RCFGBuilder initialized [2025-01-08 22:07:39,592 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.01 10:07:39" (1/1) ... [2025-01-08 22:07:39,596 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-01-08 22:07:39,603 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-08 22:07:39,616 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2025-01-08 22:07:39,625 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2025-01-08 22:07:39,640 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2025-01-08 22:07:39,641 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2025-01-08 22:07:39,641 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2025-01-08 22:07:39,641 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2025-01-08 22:07:39,641 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2025-01-08 22:07:39,641 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2025-01-08 22:07:39,641 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2025-01-08 22:07:39,641 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2025-01-08 22:07:39,641 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2025-01-08 22:07:39,641 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2025-01-08 22:07:39,641 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2025-01-08 22:07:39,641 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2025-01-08 22:07:39,641 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2025-01-08 22:07:39,642 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2025-01-08 22:07:39,642 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2025-01-08 22:07:39,642 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#3 [2025-01-08 22:07:39,642 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2025-01-08 22:07:39,642 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2025-01-08 22:07:39,642 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2025-01-08 22:07:39,705 INFO L234 CfgBuilder]: Building ICFG [2025-01-08 22:07:39,710 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2025-01-08 22:07:39,813 INFO L? ?]: Removed 6 outVars from TransFormulas that were not future-live. [2025-01-08 22:07:39,813 INFO L283 CfgBuilder]: Performing block encoding [2025-01-08 22:07:39,818 INFO L307 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2025-01-08 22:07:39,819 INFO L312 CfgBuilder]: Removed 0 assume(true) statements. [2025-01-08 22:07:39,819 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 08.01 10:07:39 BoogieIcfgContainer [2025-01-08 22:07:39,819 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2025-01-08 22:07:39,820 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2025-01-08 22:07:39,823 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2025-01-08 22:07:39,827 INFO L274 PluginConnector]: TraceAbstraction initialized [2025-01-08 22:07:39,827 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 08.01 10:07:39" (1/3) ... [2025-01-08 22:07:39,827 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@57075d6c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 08.01 10:07:39, skipping insertion in model container [2025-01-08 22:07:39,828 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.01 10:07:39" (2/3) ... [2025-01-08 22:07:39,828 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@57075d6c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 08.01 10:07:39, skipping insertion in model container [2025-01-08 22:07:39,828 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 08.01 10:07:39" (3/3) ... [2025-01-08 22:07:39,829 INFO L128 eAbstractionObserver]: Analyzing ICFG standard_partial_init_ground.i [2025-01-08 22:07:39,840 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2025-01-08 22:07:39,842 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG standard_partial_init_ground.i that has 2 procedures, 21 locations, 1 initial locations, 4 loop locations, and 1 error locations. [2025-01-08 22:07:39,875 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2025-01-08 22:07:39,882 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;@783bd6e4, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2025-01-08 22:07:39,883 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2025-01-08 22:07:39,885 INFO L276 IsEmpty]: Start isEmpty. Operand has 21 states, 16 states have (on average 1.4375) internal successors, (23), 17 states have internal predecessors, (23), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2025-01-08 22:07:39,889 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2025-01-08 22:07:39,889 INFO L210 NwaCegarLoop]: Found error trace [2025-01-08 22:07:39,890 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-01-08 22:07:39,890 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-01-08 22:07:39,893 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-08 22:07:39,893 INFO L85 PathProgramCache]: Analyzing trace with hash -1869875136, now seen corresponding path program 1 times [2025-01-08 22:07:39,898 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-08 22:07:39,899 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1555801832] [2025-01-08 22:07:39,899 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-08 22:07:39,899 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-08 22:07:39,959 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 9 statements into 1 equivalence classes. [2025-01-08 22:07:39,975 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 9 of 9 statements. [2025-01-08 22:07:39,975 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-08 22:07:39,975 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-08 22:07:40,072 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-01-08 22:07:40,072 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-08 22:07:40,073 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1555801832] [2025-01-08 22:07:40,073 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1555801832] provided 1 perfect and 0 imperfect interpolant sequences [2025-01-08 22:07:40,073 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-01-08 22:07:40,073 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2025-01-08 22:07:40,074 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [683177116] [2025-01-08 22:07:40,075 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-01-08 22:07:40,077 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2025-01-08 22:07:40,077 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-08 22:07:40,089 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2025-01-08 22:07:40,090 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-01-08 22:07:40,091 INFO L87 Difference]: Start difference. First operand has 21 states, 16 states have (on average 1.4375) internal successors, (23), 17 states have internal predecessors, (23), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Second operand has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-08 22:07:40,119 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-01-08 22:07:40,120 INFO L93 Difference]: Finished difference Result 43 states and 59 transitions. [2025-01-08 22:07:40,120 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-01-08 22:07:40,121 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2025-01-08 22:07:40,121 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-01-08 22:07:40,125 INFO L225 Difference]: With dead ends: 43 [2025-01-08 22:07:40,125 INFO L226 Difference]: Without dead ends: 22 [2025-01-08 22:07:40,127 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-01-08 22:07:40,128 INFO L435 NwaCegarLoop]: 22 mSDtfsCounter, 3 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-01-08 22:07:40,129 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 40 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-01-08 22:07:40,137 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2025-01-08 22:07:40,146 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 20. [2025-01-08 22:07:40,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 16 states have (on average 1.3125) internal successors, (21), 16 states have internal predecessors, (21), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2025-01-08 22:07:40,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 25 transitions. [2025-01-08 22:07:40,153 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 25 transitions. Word has length 9 [2025-01-08 22:07:40,153 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-01-08 22:07:40,154 INFO L471 AbstractCegarLoop]: Abstraction has 20 states and 25 transitions. [2025-01-08 22:07:40,154 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-08 22:07:40,154 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 25 transitions. [2025-01-08 22:07:40,154 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2025-01-08 22:07:40,154 INFO L210 NwaCegarLoop]: Found error trace [2025-01-08 22:07:40,155 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-01-08 22:07:40,155 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2025-01-08 22:07:40,155 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-01-08 22:07:40,155 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-08 22:07:40,155 INFO L85 PathProgramCache]: Analyzing trace with hash -59329052, now seen corresponding path program 1 times [2025-01-08 22:07:40,155 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-08 22:07:40,155 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [63382561] [2025-01-08 22:07:40,155 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-08 22:07:40,156 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-08 22:07:40,174 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 13 statements into 1 equivalence classes. [2025-01-08 22:07:40,189 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 13 of 13 statements. [2025-01-08 22:07:40,191 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-08 22:07:40,192 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-08 22:07:40,244 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-01-08 22:07:40,244 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-08 22:07:40,244 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [63382561] [2025-01-08 22:07:40,244 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [63382561] provided 0 perfect and 1 imperfect interpolant sequences [2025-01-08 22:07:40,244 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1250403048] [2025-01-08 22:07:40,245 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-08 22:07:40,245 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-08 22:07:40,245 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-08 22:07:40,247 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-01-08 22:07:40,248 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2025-01-08 22:07:40,286 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 13 statements into 1 equivalence classes. [2025-01-08 22:07:40,299 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 13 of 13 statements. [2025-01-08 22:07:40,299 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-08 22:07:40,299 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-08 22:07:40,300 INFO L256 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 3 conjuncts are in the unsatisfiable core [2025-01-08 22:07:40,303 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-08 22:07:40,330 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-01-08 22:07:40,330 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-01-08 22:07:40,346 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-01-08 22:07:40,346 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1250403048] provided 0 perfect and 2 imperfect interpolant sequences [2025-01-08 22:07:40,346 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-01-08 22:07:40,346 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2025-01-08 22:07:40,347 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [249335355] [2025-01-08 22:07:40,347 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-01-08 22:07:40,347 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2025-01-08 22:07:40,347 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-08 22:07:40,350 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2025-01-08 22:07:40,350 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2025-01-08 22:07:40,350 INFO L87 Difference]: Start difference. First operand 20 states and 25 transitions. Second operand has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 7 states have internal predecessors, (17), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-08 22:07:40,388 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-01-08 22:07:40,388 INFO L93 Difference]: Finished difference Result 48 states and 66 transitions. [2025-01-08 22:07:40,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2025-01-08 22:07:40,389 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 7 states have internal predecessors, (17), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2025-01-08 22:07:40,389 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-01-08 22:07:40,389 INFO L225 Difference]: With dead ends: 48 [2025-01-08 22:07:40,389 INFO L226 Difference]: Without dead ends: 32 [2025-01-08 22:07:40,389 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2025-01-08 22:07:40,390 INFO L435 NwaCegarLoop]: 19 mSDtfsCounter, 24 mSDsluCounter, 33 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-01-08 22:07:40,390 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [24 Valid, 52 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-01-08 22:07:40,391 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2025-01-08 22:07:40,393 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2025-01-08 22:07:40,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 28 states have (on average 1.2857142857142858) internal successors, (36), 28 states have internal predecessors, (36), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2025-01-08 22:07:40,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 40 transitions. [2025-01-08 22:07:40,394 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 40 transitions. Word has length 13 [2025-01-08 22:07:40,394 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-01-08 22:07:40,394 INFO L471 AbstractCegarLoop]: Abstraction has 32 states and 40 transitions. [2025-01-08 22:07:40,394 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 7 states have internal predecessors, (17), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-08 22:07:40,395 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 40 transitions. [2025-01-08 22:07:40,395 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2025-01-08 22:07:40,395 INFO L210 NwaCegarLoop]: Found error trace [2025-01-08 22:07:40,395 INFO L218 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-01-08 22:07:40,401 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2025-01-08 22:07:40,595 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 [2025-01-08 22:07:40,596 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-01-08 22:07:40,597 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-08 22:07:40,597 INFO L85 PathProgramCache]: Analyzing trace with hash -1961897152, now seen corresponding path program 2 times [2025-01-08 22:07:40,597 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-08 22:07:40,597 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [991091923] [2025-01-08 22:07:40,597 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-01-08 22:07:40,597 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-08 22:07:40,609 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 25 statements into 2 equivalence classes. [2025-01-08 22:07:40,613 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) and asserted 9 of 25 statements. [2025-01-08 22:07:40,613 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2025-01-08 22:07:40,613 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-08 22:07:40,711 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2025-01-08 22:07:40,711 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-08 22:07:40,711 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [991091923] [2025-01-08 22:07:40,711 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [991091923] provided 1 perfect and 0 imperfect interpolant sequences [2025-01-08 22:07:40,711 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-01-08 22:07:40,711 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2025-01-08 22:07:40,711 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1212004690] [2025-01-08 22:07:40,711 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-01-08 22:07:40,712 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-01-08 22:07:40,712 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-08 22:07:40,712 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-01-08 22:07:40,712 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2025-01-08 22:07:40,712 INFO L87 Difference]: Start difference. First operand 32 states and 40 transitions. Second operand has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-08 22:07:40,740 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-01-08 22:07:40,741 INFO L93 Difference]: Finished difference Result 57 states and 72 transitions. [2025-01-08 22:07:40,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-01-08 22:07:40,745 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2025-01-08 22:07:40,745 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-01-08 22:07:40,745 INFO L225 Difference]: With dead ends: 57 [2025-01-08 22:07:40,745 INFO L226 Difference]: Without dead ends: 43 [2025-01-08 22:07:40,745 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2025-01-08 22:07:40,746 INFO L435 NwaCegarLoop]: 21 mSDtfsCounter, 1 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-01-08 22:07:40,746 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 42 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-01-08 22:07:40,747 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2025-01-08 22:07:40,754 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 41. [2025-01-08 22:07:40,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 37 states have (on average 1.2972972972972974) internal successors, (48), 37 states have internal predecessors, (48), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2025-01-08 22:07:40,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 52 transitions. [2025-01-08 22:07:40,755 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 52 transitions. Word has length 25 [2025-01-08 22:07:40,755 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-01-08 22:07:40,755 INFO L471 AbstractCegarLoop]: Abstraction has 41 states and 52 transitions. [2025-01-08 22:07:40,755 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-08 22:07:40,756 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 52 transitions. [2025-01-08 22:07:40,756 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2025-01-08 22:07:40,756 INFO L210 NwaCegarLoop]: Found error trace [2025-01-08 22:07:40,756 INFO L218 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-01-08 22:07:40,756 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2025-01-08 22:07:40,756 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-01-08 22:07:40,756 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-08 22:07:40,756 INFO L85 PathProgramCache]: Analyzing trace with hash -1152550526, now seen corresponding path program 1 times [2025-01-08 22:07:40,757 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-08 22:07:40,757 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [902179079] [2025-01-08 22:07:40,757 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-08 22:07:40,757 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-08 22:07:40,767 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 25 statements into 1 equivalence classes. [2025-01-08 22:07:40,779 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 25 of 25 statements. [2025-01-08 22:07:40,779 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-08 22:07:40,779 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-08 22:07:40,897 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2025-01-08 22:07:40,897 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-08 22:07:40,897 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [902179079] [2025-01-08 22:07:40,898 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [902179079] provided 0 perfect and 1 imperfect interpolant sequences [2025-01-08 22:07:40,898 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1173763850] [2025-01-08 22:07:40,898 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-08 22:07:40,898 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-08 22:07:40,898 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-08 22:07:40,901 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-01-08 22:07:40,905 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2025-01-08 22:07:40,943 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 25 statements into 1 equivalence classes. [2025-01-08 22:07:40,962 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 25 of 25 statements. [2025-01-08 22:07:40,962 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-08 22:07:40,962 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-08 22:07:40,963 INFO L256 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 6 conjuncts are in the unsatisfiable core [2025-01-08 22:07:40,965 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-08 22:07:40,978 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2025-01-08 22:07:40,979 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-01-08 22:07:41,026 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2025-01-08 22:07:41,027 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1173763850] provided 0 perfect and 2 imperfect interpolant sequences [2025-01-08 22:07:41,027 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-01-08 22:07:41,027 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 13 [2025-01-08 22:07:41,027 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [251025871] [2025-01-08 22:07:41,027 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-01-08 22:07:41,027 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2025-01-08 22:07:41,027 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-08 22:07:41,028 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2025-01-08 22:07:41,028 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2025-01-08 22:07:41,028 INFO L87 Difference]: Start difference. First operand 41 states and 52 transitions. Second operand has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 13 states have internal predecessors, (24), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-08 22:07:41,103 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-01-08 22:07:41,103 INFO L93 Difference]: Finished difference Result 119 states and 164 transitions. [2025-01-08 22:07:41,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2025-01-08 22:07:41,103 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 13 states have internal predecessors, (24), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2025-01-08 22:07:41,103 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-01-08 22:07:41,104 INFO L225 Difference]: With dead ends: 119 [2025-01-08 22:07:41,104 INFO L226 Difference]: Without dead ends: 85 [2025-01-08 22:07:41,104 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2025-01-08 22:07:41,105 INFO L435 NwaCegarLoop]: 19 mSDtfsCounter, 60 mSDsluCounter, 54 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 73 SdHoareTripleChecker+Invalid, 73 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 45 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-01-08 22:07:41,105 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [60 Valid, 73 Invalid, 73 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 45 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-01-08 22:07:41,106 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2025-01-08 22:07:41,111 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 83. [2025-01-08 22:07:41,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 79 states have (on average 1.2911392405063291) internal successors, (102), 79 states have internal predecessors, (102), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2025-01-08 22:07:41,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 106 transitions. [2025-01-08 22:07:41,112 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 106 transitions. Word has length 25 [2025-01-08 22:07:41,112 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-01-08 22:07:41,112 INFO L471 AbstractCegarLoop]: Abstraction has 83 states and 106 transitions. [2025-01-08 22:07:41,116 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 13 states have internal predecessors, (24), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-08 22:07:41,117 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 106 transitions. [2025-01-08 22:07:41,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2025-01-08 22:07:41,117 INFO L210 NwaCegarLoop]: Found error trace [2025-01-08 22:07:41,117 INFO L218 NwaCegarLoop]: trace histogram [10, 10, 10, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-01-08 22:07:41,128 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2025-01-08 22:07:41,318 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-08 22:07:41,318 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-01-08 22:07:41,319 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-08 22:07:41,319 INFO L85 PathProgramCache]: Analyzing trace with hash 1847480834, now seen corresponding path program 2 times [2025-01-08 22:07:41,319 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-08 22:07:41,319 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [613726200] [2025-01-08 22:07:41,319 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-01-08 22:07:41,320 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-08 22:07:41,353 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 49 statements into 2 equivalence classes. [2025-01-08 22:07:41,369 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 49 of 49 statements. [2025-01-08 22:07:41,370 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-01-08 22:07:41,370 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-08 22:07:41,579 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2025-01-08 22:07:41,579 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-08 22:07:41,580 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [613726200] [2025-01-08 22:07:41,580 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [613726200] provided 0 perfect and 1 imperfect interpolant sequences [2025-01-08 22:07:41,580 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [80032925] [2025-01-08 22:07:41,580 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-01-08 22:07:41,580 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-08 22:07:41,580 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-08 22:07:41,583 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-01-08 22:07:41,587 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2025-01-08 22:07:41,645 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 49 statements into 2 equivalence classes. [2025-01-08 22:07:41,678 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 49 of 49 statements. [2025-01-08 22:07:41,679 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-01-08 22:07:41,679 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-08 22:07:41,680 INFO L256 TraceCheckSpWp]: Trace formula consists of 308 conjuncts, 12 conjuncts are in the unsatisfiable core [2025-01-08 22:07:41,682 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-08 22:07:41,706 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2025-01-08 22:07:41,706 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-01-08 22:07:41,907 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2025-01-08 22:07:41,907 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [80032925] provided 0 perfect and 2 imperfect interpolant sequences [2025-01-08 22:07:41,907 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-01-08 22:07:41,907 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 25 [2025-01-08 22:07:41,907 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [210807918] [2025-01-08 22:07:41,907 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-01-08 22:07:41,907 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2025-01-08 22:07:41,907 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-08 22:07:41,908 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2025-01-08 22:07:41,908 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2025-01-08 22:07:41,908 INFO L87 Difference]: Start difference. First operand 83 states and 106 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-08 22:07:42,059 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-01-08 22:07:42,061 INFO L93 Difference]: Finished difference Result 239 states and 332 transitions. [2025-01-08 22:07:42,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2025-01-08 22:07:42,061 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 49 [2025-01-08 22:07:42,061 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-01-08 22:07:42,062 INFO L225 Difference]: With dead ends: 239 [2025-01-08 22:07:42,062 INFO L226 Difference]: Without dead ends: 169 [2025-01-08 22:07:42,063 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 86 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2025-01-08 22:07:42,063 INFO L435 NwaCegarLoop]: 19 mSDtfsCounter, 195 mSDsluCounter, 81 mSDsCounter, 0 mSdLazyCounter, 94 mSolverCounterSat, 79 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 195 SdHoareTripleChecker+Valid, 100 SdHoareTripleChecker+Invalid, 173 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 79 IncrementalHoareTripleChecker+Valid, 94 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-01-08 22:07:42,063 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [195 Valid, 100 Invalid, 173 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [79 Valid, 94 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-01-08 22:07:42,064 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2025-01-08 22:07:42,074 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 167. [2025-01-08 22:07:42,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 167 states, 163 states have (on average 1.2883435582822085) internal successors, (210), 163 states have internal predecessors, (210), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2025-01-08 22:07:42,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 214 transitions. [2025-01-08 22:07:42,076 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 214 transitions. Word has length 49 [2025-01-08 22:07:42,077 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-01-08 22:07:42,077 INFO L471 AbstractCegarLoop]: Abstraction has 167 states and 214 transitions. [2025-01-08 22:07:42,077 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-08 22:07:42,077 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 214 transitions. [2025-01-08 22:07:42,079 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2025-01-08 22:07:42,079 INFO L210 NwaCegarLoop]: Found error trace [2025-01-08 22:07:42,079 INFO L218 NwaCegarLoop]: trace histogram [22, 22, 22, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-01-08 22:07:42,087 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2025-01-08 22:07:42,283 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-08 22:07:42,283 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-01-08 22:07:42,284 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-08 22:07:42,284 INFO L85 PathProgramCache]: Analyzing trace with hash -1183014142, now seen corresponding path program 3 times [2025-01-08 22:07:42,284 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-08 22:07:42,284 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1475936009] [2025-01-08 22:07:42,284 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-01-08 22:07:42,284 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-08 22:07:42,308 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 97 statements into 23 equivalence classes. [2025-01-08 22:07:42,318 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) and asserted 14 of 97 statements. [2025-01-08 22:07:42,320 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2025-01-08 22:07:42,320 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-08 22:07:42,522 INFO L134 CoverageAnalysis]: Checked inductivity of 968 backedges. 0 proven. 43 refuted. 0 times theorem prover too weak. 925 trivial. 0 not checked. [2025-01-08 22:07:42,523 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-08 22:07:42,523 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1475936009] [2025-01-08 22:07:42,523 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1475936009] provided 0 perfect and 1 imperfect interpolant sequences [2025-01-08 22:07:42,523 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [12191414] [2025-01-08 22:07:42,523 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-01-08 22:07:42,523 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-08 22:07:42,523 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-08 22:07:42,525 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-01-08 22:07:42,526 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2025-01-08 22:07:42,601 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 97 statements into 23 equivalence classes. [2025-01-08 22:07:42,613 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) and asserted 14 of 97 statements. [2025-01-08 22:07:42,613 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2025-01-08 22:07:42,614 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-08 22:07:42,614 INFO L256 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 15 conjuncts are in the unsatisfiable core [2025-01-08 22:07:42,617 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-08 22:07:42,876 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2025-01-08 22:07:42,932 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 9 [2025-01-08 22:07:43,003 INFO L134 CoverageAnalysis]: Checked inductivity of 968 backedges. 0 proven. 43 refuted. 0 times theorem prover too weak. 925 trivial. 0 not checked. [2025-01-08 22:07:43,003 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-01-08 22:07:43,078 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 18 treesize of output 16 [2025-01-08 22:07:43,081 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 20 [2025-01-08 22:07:43,180 INFO L134 CoverageAnalysis]: Checked inductivity of 968 backedges. 0 proven. 43 refuted. 0 times theorem prover too weak. 925 trivial. 0 not checked. [2025-01-08 22:07:43,180 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [12191414] provided 0 perfect and 2 imperfect interpolant sequences [2025-01-08 22:07:43,180 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-01-08 22:07:43,180 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 20 [2025-01-08 22:07:43,180 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [453670183] [2025-01-08 22:07:43,180 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-01-08 22:07:43,181 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2025-01-08 22:07:43,181 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-08 22:07:43,181 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2025-01-08 22:07:43,181 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=316, Unknown=0, NotChecked=0, Total=380 [2025-01-08 22:07:43,181 INFO L87 Difference]: Start difference. First operand 167 states and 214 transitions. Second operand has 20 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 18 states have internal predecessors, (30), 3 states have call successors, (3), 2 states have call predecessors, (3), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-08 22:07:43,372 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-01-08 22:07:43,373 INFO L93 Difference]: Finished difference Result 294 states and 370 transitions. [2025-01-08 22:07:43,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2025-01-08 22:07:43,373 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 18 states have internal predecessors, (30), 3 states have call successors, (3), 2 states have call predecessors, (3), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 97 [2025-01-08 22:07:43,374 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-01-08 22:07:43,379 INFO L225 Difference]: With dead ends: 294 [2025-01-08 22:07:43,379 INFO L226 Difference]: Without dead ends: 292 [2025-01-08 22:07:43,380 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 205 GetRequests, 181 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=99, Invalid=453, Unknown=0, NotChecked=0, Total=552 [2025-01-08 22:07:43,380 INFO L435 NwaCegarLoop]: 14 mSDtfsCounter, 68 mSDsluCounter, 76 mSDsCounter, 0 mSdLazyCounter, 231 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 73 SdHoareTripleChecker+Valid, 90 SdHoareTripleChecker+Invalid, 255 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 231 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-01-08 22:07:43,380 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [73 Valid, 90 Invalid, 255 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 231 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-01-08 22:07:43,381 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 292 states. [2025-01-08 22:07:43,399 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 292 to 173. [2025-01-08 22:07:43,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 173 states, 167 states have (on average 1.2874251497005988) internal successors, (215), 168 states have internal predecessors, (215), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2025-01-08 22:07:43,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 221 transitions. [2025-01-08 22:07:43,401 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 221 transitions. Word has length 97 [2025-01-08 22:07:43,401 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-01-08 22:07:43,401 INFO L471 AbstractCegarLoop]: Abstraction has 173 states and 221 transitions. [2025-01-08 22:07:43,401 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 18 states have internal predecessors, (30), 3 states have call successors, (3), 2 states have call predecessors, (3), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-08 22:07:43,401 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 221 transitions. [2025-01-08 22:07:43,402 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2025-01-08 22:07:43,402 INFO L210 NwaCegarLoop]: Found error trace [2025-01-08 22:07:43,402 INFO L218 NwaCegarLoop]: trace histogram [22, 22, 22, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-01-08 22:07:43,408 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2025-01-08 22:07:43,607 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 [2025-01-08 22:07:43,607 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-01-08 22:07:43,608 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-08 22:07:43,608 INFO L85 PathProgramCache]: Analyzing trace with hash 2078621351, now seen corresponding path program 1 times [2025-01-08 22:07:43,608 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-08 22:07:43,608 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1006105719] [2025-01-08 22:07:43,608 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-08 22:07:43,608 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-08 22:07:43,639 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 98 statements into 1 equivalence classes. [2025-01-08 22:07:43,660 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 98 of 98 statements. [2025-01-08 22:07:43,660 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-08 22:07:43,661 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-08 22:07:44,261 INFO L134 CoverageAnalysis]: Checked inductivity of 968 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 715 trivial. 0 not checked. [2025-01-08 22:07:44,261 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-08 22:07:44,261 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1006105719] [2025-01-08 22:07:44,261 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1006105719] provided 0 perfect and 1 imperfect interpolant sequences [2025-01-08 22:07:44,262 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [595045774] [2025-01-08 22:07:44,262 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-08 22:07:44,262 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-08 22:07:44,262 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-08 22:07:44,263 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-01-08 22:07:44,270 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2025-01-08 22:07:44,344 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 98 statements into 1 equivalence classes. [2025-01-08 22:07:44,398 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 98 of 98 statements. [2025-01-08 22:07:44,398 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-08 22:07:44,398 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-08 22:07:44,401 INFO L256 TraceCheckSpWp]: Trace formula consists of 587 conjuncts, 24 conjuncts are in the unsatisfiable core [2025-01-08 22:07:44,403 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-08 22:07:44,436 INFO L134 CoverageAnalysis]: Checked inductivity of 968 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 715 trivial. 0 not checked. [2025-01-08 22:07:44,436 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-01-08 22:07:45,009 INFO L134 CoverageAnalysis]: Checked inductivity of 968 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 715 trivial. 0 not checked. [2025-01-08 22:07:45,009 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [595045774] provided 0 perfect and 2 imperfect interpolant sequences [2025-01-08 22:07:45,009 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-01-08 22:07:45,010 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25, 25] total 49 [2025-01-08 22:07:45,010 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1442773934] [2025-01-08 22:07:45,010 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-01-08 22:07:45,010 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2025-01-08 22:07:45,010 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-08 22:07:45,011 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2025-01-08 22:07:45,012 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=1176, Invalid=1176, Unknown=0, NotChecked=0, Total=2352 [2025-01-08 22:07:45,012 INFO L87 Difference]: Start difference. First operand 173 states and 221 transitions. Second operand has 49 states, 49 states have (on average 1.2448979591836735) internal successors, (61), 49 states have internal predecessors, (61), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-08 22:07:45,369 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-01-08 22:07:45,369 INFO L93 Difference]: Finished difference Result 491 states and 682 transitions. [2025-01-08 22:07:45,369 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2025-01-08 22:07:45,369 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 1.2448979591836735) internal successors, (61), 49 states have internal predecessors, (61), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 98 [2025-01-08 22:07:45,370 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-01-08 22:07:45,372 INFO L225 Difference]: With dead ends: 491 [2025-01-08 22:07:45,372 INFO L226 Difference]: Without dead ends: 343 [2025-01-08 22:07:45,373 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 219 GetRequests, 172 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1176, Invalid=1176, Unknown=0, NotChecked=0, Total=2352 [2025-01-08 22:07:45,373 INFO L435 NwaCegarLoop]: 19 mSDtfsCounter, 408 mSDsluCounter, 136 mSDsCounter, 0 mSdLazyCounter, 196 mSolverCounterSat, 162 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 408 SdHoareTripleChecker+Valid, 155 SdHoareTripleChecker+Invalid, 358 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 162 IncrementalHoareTripleChecker+Valid, 196 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2025-01-08 22:07:45,374 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [408 Valid, 155 Invalid, 358 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [162 Valid, 196 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2025-01-08 22:07:45,374 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 343 states. [2025-01-08 22:07:45,389 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 343 to 341. [2025-01-08 22:07:45,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 341 states, 335 states have (on average 1.2865671641791045) internal successors, (431), 336 states have internal predecessors, (431), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2025-01-08 22:07:45,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 341 states to 341 states and 437 transitions. [2025-01-08 22:07:45,392 INFO L78 Accepts]: Start accepts. Automaton has 341 states and 437 transitions. Word has length 98 [2025-01-08 22:07:45,392 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-01-08 22:07:45,392 INFO L471 AbstractCegarLoop]: Abstraction has 341 states and 437 transitions. [2025-01-08 22:07:45,392 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 1.2448979591836735) internal successors, (61), 49 states have internal predecessors, (61), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-08 22:07:45,392 INFO L276 IsEmpty]: Start isEmpty. Operand 341 states and 437 transitions. [2025-01-08 22:07:45,393 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 195 [2025-01-08 22:07:45,393 INFO L210 NwaCegarLoop]: Found error trace [2025-01-08 22:07:45,394 INFO L218 NwaCegarLoop]: trace histogram [46, 46, 46, 45, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-01-08 22:07:45,401 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2025-01-08 22:07:45,597 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 [2025-01-08 22:07:45,598 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-01-08 22:07:45,598 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-08 22:07:45,598 INFO L85 PathProgramCache]: Analyzing trace with hash 1161452711, now seen corresponding path program 2 times [2025-01-08 22:07:45,598 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-08 22:07:45,598 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [352525332] [2025-01-08 22:07:45,598 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-01-08 22:07:45,598 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-08 22:07:45,657 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 194 statements into 2 equivalence classes. [2025-01-08 22:07:45,659 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) and asserted 10 of 194 statements. [2025-01-08 22:07:45,659 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2025-01-08 22:07:45,659 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-08 22:07:45,695 INFO L134 CoverageAnalysis]: Checked inductivity of 4232 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4232 trivial. 0 not checked. [2025-01-08 22:07:45,695 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-08 22:07:45,695 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [352525332] [2025-01-08 22:07:45,695 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [352525332] provided 1 perfect and 0 imperfect interpolant sequences [2025-01-08 22:07:45,695 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-01-08 22:07:45,695 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2025-01-08 22:07:45,695 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1124148257] [2025-01-08 22:07:45,695 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-01-08 22:07:45,696 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-01-08 22:07:45,696 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-08 22:07:45,696 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-01-08 22:07:45,696 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2025-01-08 22:07:45,696 INFO L87 Difference]: Start difference. First operand 341 states and 437 transitions. Second operand has 4 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-08 22:07:45,739 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-01-08 22:07:45,739 INFO L93 Difference]: Finished difference Result 355 states and 452 transitions. [2025-01-08 22:07:45,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-01-08 22:07:45,739 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 194 [2025-01-08 22:07:45,739 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-01-08 22:07:45,741 INFO L225 Difference]: With dead ends: 355 [2025-01-08 22:07:45,741 INFO L226 Difference]: Without dead ends: 345 [2025-01-08 22:07:45,741 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2025-01-08 22:07:45,741 INFO L435 NwaCegarLoop]: 18 mSDtfsCounter, 2 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-01-08 22:07:45,741 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 34 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-01-08 22:07:45,742 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 345 states. [2025-01-08 22:07:45,769 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 345 to 341. [2025-01-08 22:07:45,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 341 states, 335 states have (on average 1.2835820895522387) internal successors, (430), 336 states have internal predecessors, (430), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2025-01-08 22:07:45,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 341 states to 341 states and 436 transitions. [2025-01-08 22:07:45,771 INFO L78 Accepts]: Start accepts. Automaton has 341 states and 436 transitions. Word has length 194 [2025-01-08 22:07:45,771 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-01-08 22:07:45,771 INFO L471 AbstractCegarLoop]: Abstraction has 341 states and 436 transitions. [2025-01-08 22:07:45,771 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-08 22:07:45,771 INFO L276 IsEmpty]: Start isEmpty. Operand 341 states and 436 transitions. [2025-01-08 22:07:45,773 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 201 [2025-01-08 22:07:45,773 INFO L210 NwaCegarLoop]: Found error trace [2025-01-08 22:07:45,773 INFO L218 NwaCegarLoop]: trace histogram [46, 46, 46, 45, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-01-08 22:07:45,773 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2025-01-08 22:07:45,773 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-01-08 22:07:45,773 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-08 22:07:45,773 INFO L85 PathProgramCache]: Analyzing trace with hash -758076504, now seen corresponding path program 1 times [2025-01-08 22:07:45,773 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-08 22:07:45,773 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1261749671] [2025-01-08 22:07:45,773 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-08 22:07:45,773 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-08 22:07:45,804 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 200 statements into 1 equivalence classes. [2025-01-08 22:07:45,834 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 200 of 200 statements. [2025-01-08 22:07:45,834 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-08 22:07:45,834 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-08 22:07:47,632 INFO L134 CoverageAnalysis]: Checked inductivity of 4236 backedges. 2 proven. 1081 refuted. 0 times theorem prover too weak. 3153 trivial. 0 not checked. [2025-01-08 22:07:47,633 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-08 22:07:47,633 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1261749671] [2025-01-08 22:07:47,633 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1261749671] provided 0 perfect and 1 imperfect interpolant sequences [2025-01-08 22:07:47,633 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1896610238] [2025-01-08 22:07:47,633 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-08 22:07:47,633 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-08 22:07:47,633 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-08 22:07:47,635 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-01-08 22:07:47,643 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2025-01-08 22:07:47,767 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 200 statements into 1 equivalence classes. [2025-01-08 22:07:47,861 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 200 of 200 statements. [2025-01-08 22:07:47,862 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-08 22:07:47,862 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-08 22:07:47,866 INFO L256 TraceCheckSpWp]: Trace formula consists of 1150 conjuncts, 48 conjuncts are in the unsatisfiable core [2025-01-08 22:07:47,869 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-08 22:07:47,927 INFO L134 CoverageAnalysis]: Checked inductivity of 4236 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 3155 trivial. 0 not checked. [2025-01-08 22:07:47,927 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-01-08 22:07:49,967 INFO L134 CoverageAnalysis]: Checked inductivity of 4236 backedges. 2 proven. 1081 refuted. 0 times theorem prover too weak. 3153 trivial. 0 not checked. [2025-01-08 22:07:49,967 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1896610238] provided 0 perfect and 2 imperfect interpolant sequences [2025-01-08 22:07:49,967 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-01-08 22:07:49,967 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 49, 49] total 97 [2025-01-08 22:07:49,967 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1036741552] [2025-01-08 22:07:49,967 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-01-08 22:07:49,968 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 97 states [2025-01-08 22:07:49,968 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-08 22:07:49,970 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 97 interpolants. [2025-01-08 22:07:49,973 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=4656, Invalid=4656, Unknown=0, NotChecked=0, Total=9312 [2025-01-08 22:07:49,974 INFO L87 Difference]: Start difference. First operand 341 states and 436 transitions. Second operand has 97 states, 97 states have (on average 1.175257731958763) internal successors, (114), 97 states have internal predecessors, (114), 1 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2025-01-08 22:07:51,492 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-01-08 22:07:51,493 INFO L93 Difference]: Finished difference Result 971 states and 1352 transitions. [2025-01-08 22:07:51,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2025-01-08 22:07:51,497 INFO L78 Accepts]: Start accepts. Automaton has has 97 states, 97 states have (on average 1.175257731958763) internal successors, (114), 97 states have internal predecessors, (114), 1 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 200 [2025-01-08 22:07:51,497 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-01-08 22:07:51,499 INFO L225 Difference]: With dead ends: 971 [2025-01-08 22:07:51,499 INFO L226 Difference]: Without dead ends: 679 [2025-01-08 22:07:51,501 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 447 GetRequests, 352 SyntacticMatches, 0 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 184 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=4656, Invalid=4656, Unknown=0, NotChecked=0, Total=9312 [2025-01-08 22:07:51,501 INFO L435 NwaCegarLoop]: 19 mSDtfsCounter, 1008 mSDsluCounter, 183 mSDsCounter, 0 mSdLazyCounter, 384 mSolverCounterSat, 386 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1008 SdHoareTripleChecker+Valid, 202 SdHoareTripleChecker+Invalid, 770 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 386 IncrementalHoareTripleChecker+Valid, 384 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2025-01-08 22:07:51,502 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [1008 Valid, 202 Invalid, 770 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [386 Valid, 384 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2025-01-08 22:07:51,502 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 679 states. [2025-01-08 22:07:51,520 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 679 to 677. [2025-01-08 22:07:51,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 677 states, 671 states have (on average 1.2846497764530551) internal successors, (862), 672 states have internal predecessors, (862), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2025-01-08 22:07:51,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 677 states to 677 states and 868 transitions. [2025-01-08 22:07:51,524 INFO L78 Accepts]: Start accepts. Automaton has 677 states and 868 transitions. Word has length 200 [2025-01-08 22:07:51,524 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-01-08 22:07:51,524 INFO L471 AbstractCegarLoop]: Abstraction has 677 states and 868 transitions. [2025-01-08 22:07:51,524 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 97 states, 97 states have (on average 1.175257731958763) internal successors, (114), 97 states have internal predecessors, (114), 1 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2025-01-08 22:07:51,524 INFO L276 IsEmpty]: Start isEmpty. Operand 677 states and 868 transitions. [2025-01-08 22:07:51,527 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 393 [2025-01-08 22:07:51,527 INFO L210 NwaCegarLoop]: Found error trace [2025-01-08 22:07:51,528 INFO L218 NwaCegarLoop]: trace histogram [94, 94, 94, 93, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-01-08 22:07:51,535 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2025-01-08 22:07:51,732 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,SelfDestructingSolverStorable8 [2025-01-08 22:07:51,732 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-01-08 22:07:51,733 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-08 22:07:51,733 INFO L85 PathProgramCache]: Analyzing trace with hash -564926552, now seen corresponding path program 2 times [2025-01-08 22:07:51,733 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-08 22:07:51,733 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [909498700] [2025-01-08 22:07:51,733 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-01-08 22:07:51,733 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-08 22:07:51,811 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 392 statements into 2 equivalence classes. [2025-01-08 22:07:51,854 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 392 of 392 statements. [2025-01-08 22:07:51,854 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-01-08 22:07:51,854 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-08 22:07:52,260 INFO L134 CoverageAnalysis]: Checked inductivity of 17676 backedges. 3 proven. 188 refuted. 0 times theorem prover too weak. 17485 trivial. 0 not checked. [2025-01-08 22:07:52,261 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-08 22:07:52,261 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [909498700] [2025-01-08 22:07:52,261 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [909498700] provided 0 perfect and 1 imperfect interpolant sequences [2025-01-08 22:07:52,261 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1331829275] [2025-01-08 22:07:52,261 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-01-08 22:07:52,261 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-08 22:07:52,261 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-08 22:07:52,266 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-01-08 22:07:52,268 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2025-01-08 22:07:52,476 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 392 statements into 2 equivalence classes. [2025-01-08 22:07:52,671 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 392 of 392 statements. [2025-01-08 22:07:52,671 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-01-08 22:07:52,671 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-08 22:07:52,684 INFO L256 TraceCheckSpWp]: Trace formula consists of 2254 conjuncts, 96 conjuncts are in the unsatisfiable core [2025-01-08 22:07:52,689 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-08 22:07:55,415 INFO L134 CoverageAnalysis]: Checked inductivity of 17676 backedges. 0 proven. 4465 refuted. 0 times theorem prover too weak. 13211 trivial. 0 not checked. [2025-01-08 22:07:55,416 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-01-08 22:08:02,940 INFO L134 CoverageAnalysis]: Checked inductivity of 17676 backedges. 2 proven. 4465 refuted. 0 times theorem prover too weak. 13209 trivial. 0 not checked. [2025-01-08 22:08:02,940 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1331829275] provided 0 perfect and 2 imperfect interpolant sequences [2025-01-08 22:08:02,940 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-01-08 22:08:02,940 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 97, 97] total 196 [2025-01-08 22:08:02,941 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [807288057] [2025-01-08 22:08:02,941 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-01-08 22:08:02,941 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 196 states [2025-01-08 22:08:02,941 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-08 22:08:02,945 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 196 interpolants. [2025-01-08 22:08:02,951 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=18346, Invalid=19874, Unknown=0, NotChecked=0, Total=38220 [2025-01-08 22:08:02,952 INFO L87 Difference]: Start difference. First operand 677 states and 868 transitions. Second operand has 196 states, 196 states have (on average 1.1224489795918366) internal successors, (220), 196 states have internal predecessors, (220), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3)