./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/array-fpi/nsqm.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 551b0097 Calling Ultimate with: /root/.sdkman/candidates/java/21.0.5-tem/bin/java -Dosgi.configuration.area=/storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.6.800.v20240513-1750.jar -data @noDefault -ultimatedata /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/array-fpi/nsqm.c -s /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash b64d5f0150faeb5d8c80a790953ff0d0f860fa8f91611b25d82154854354bbd0 --- Real Ultimate output --- This is Ultimate 0.3.0-?-551b009-m [2025-01-08 22:42:07,480 INFO L188 SettingsManager]: Resetting all preferences to default values... [2025-01-08 22:42:07,548 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2025-01-08 22:42:07,552 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2025-01-08 22:42:07,552 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2025-01-08 22:42:07,579 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2025-01-08 22:42:07,581 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2025-01-08 22:42:07,581 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2025-01-08 22:42:07,582 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2025-01-08 22:42:07,582 INFO L153 SettingsManager]: * Use memory slicer=true [2025-01-08 22:42:07,582 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2025-01-08 22:42:07,582 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2025-01-08 22:42:07,583 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2025-01-08 22:42:07,583 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2025-01-08 22:42:07,583 INFO L153 SettingsManager]: * Use SBE=true [2025-01-08 22:42:07,584 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2025-01-08 22:42:07,584 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2025-01-08 22:42:07,584 INFO L153 SettingsManager]: * sizeof long=4 [2025-01-08 22:42:07,584 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2025-01-08 22:42:07,584 INFO L153 SettingsManager]: * sizeof POINTER=4 [2025-01-08 22:42:07,585 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2025-01-08 22:42:07,585 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2025-01-08 22:42:07,585 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2025-01-08 22:42:07,585 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2025-01-08 22:42:07,585 INFO L153 SettingsManager]: * sizeof long double=12 [2025-01-08 22:42:07,585 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2025-01-08 22:42:07,585 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2025-01-08 22:42:07,585 INFO L153 SettingsManager]: * Use constant arrays=true [2025-01-08 22:42:07,585 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2025-01-08 22:42:07,585 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2025-01-08 22:42:07,586 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2025-01-08 22:42:07,586 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2025-01-08 22:42:07,586 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-01-08 22:42:07,586 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2025-01-08 22:42:07,586 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2025-01-08 22:42:07,587 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2025-01-08 22:42:07,587 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2025-01-08 22:42:07,587 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-01-08 22:42:07,587 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2025-01-08 22:42:07,587 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2025-01-08 22:42:07,587 INFO L153 SettingsManager]: * Compute procedure contracts=false [2025-01-08 22:42:07,587 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2025-01-08 22:42:07,587 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2025-01-08 22:42:07,587 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2025-01-08 22:42:07,587 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2025-01-08 22:42:07,588 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2025-01-08 22:42:07,588 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2025-01-08 22:42:07,588 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2025-01-08 22:42:07,588 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 -> b64d5f0150faeb5d8c80a790953ff0d0f860fa8f91611b25d82154854354bbd0 [2025-01-08 22:42:07,882 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2025-01-08 22:42:07,891 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2025-01-08 22:42:07,893 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2025-01-08 22:42:07,894 INFO L270 PluginConnector]: Initializing CDTParser... [2025-01-08 22:42:07,894 INFO L274 PluginConnector]: CDTParser initialized [2025-01-08 22:42:07,895 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-fpi/nsqm.c [2025-01-08 22:42:09,136 INFO L533 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/166c15c8d/eea2213be4b34c85a29824828b292cf0/FLAG4d1e05c21 [2025-01-08 22:42:09,361 INFO L384 CDTParser]: Found 1 translation units. [2025-01-08 22:42:09,362 INFO L180 CDTParser]: Scanning /storage/repos/ultimate-jdk21/releaseScripts/default/sv-benchmarks/c/array-fpi/nsqm.c [2025-01-08 22:42:09,379 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/166c15c8d/eea2213be4b34c85a29824828b292cf0/FLAG4d1e05c21 [2025-01-08 22:42:09,719 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/166c15c8d/eea2213be4b34c85a29824828b292cf0 [2025-01-08 22:42:09,721 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2025-01-08 22:42:09,722 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2025-01-08 22:42:09,723 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2025-01-08 22:42:09,723 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2025-01-08 22:42:09,726 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2025-01-08 22:42:09,726 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 08.01 10:42:09" (1/1) ... [2025-01-08 22:42:09,727 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5b568e3a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.01 10:42:09, skipping insertion in model container [2025-01-08 22:42:09,727 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 08.01 10:42:09" (1/1) ... [2025-01-08 22:42:09,738 INFO L175 MainTranslator]: Built tables and reachable declarations [2025-01-08 22:42:09,882 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-fpi/nsqm.c[587,600] [2025-01-08 22:42:09,907 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-01-08 22:42:09,918 INFO L200 MainTranslator]: Completed pre-run [2025-01-08 22:42:09,929 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-fpi/nsqm.c[587,600] [2025-01-08 22:42:09,940 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-01-08 22:42:09,959 INFO L204 MainTranslator]: Completed translation [2025-01-08 22:42:09,961 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.01 10:42:09 WrapperNode [2025-01-08 22:42:09,962 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2025-01-08 22:42:09,964 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2025-01-08 22:42:09,964 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2025-01-08 22:42:09,964 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2025-01-08 22:42:09,971 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.01 10:42:09" (1/1) ... [2025-01-08 22:42:09,977 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.01 10:42:09" (1/1) ... [2025-01-08 22:42:09,998 INFO L138 Inliner]: procedures = 16, calls = 26, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 70 [2025-01-08 22:42:10,000 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2025-01-08 22:42:10,001 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2025-01-08 22:42:10,002 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2025-01-08 22:42:10,002 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2025-01-08 22:42:10,011 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.01 10:42:09" (1/1) ... [2025-01-08 22:42:10,011 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.01 10:42:09" (1/1) ... [2025-01-08 22:42:10,017 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.01 10:42:09" (1/1) ... [2025-01-08 22:42:10,035 INFO L175 MemorySlicer]: Split 17 memory accesses to 4 slices as follows [2, 4, 7, 4]. 41 percent of accesses are in the largest equivalence class. The 9 initializations are split as follows [2, 0, 7, 0]. The 4 writes are split as follows [0, 2, 0, 2]. [2025-01-08 22:42:10,035 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.01 10:42:09" (1/1) ... [2025-01-08 22:42:10,035 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.01 10:42:09" (1/1) ... [2025-01-08 22:42:10,040 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.01 10:42:09" (1/1) ... [2025-01-08 22:42:10,044 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.01 10:42:09" (1/1) ... [2025-01-08 22:42:10,047 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.01 10:42:09" (1/1) ... [2025-01-08 22:42:10,051 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.01 10:42:09" (1/1) ... [2025-01-08 22:42:10,052 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.01 10:42:09" (1/1) ... [2025-01-08 22:42:10,057 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2025-01-08 22:42:10,058 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2025-01-08 22:42:10,058 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2025-01-08 22:42:10,058 INFO L274 PluginConnector]: RCFGBuilder initialized [2025-01-08 22:42:10,059 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.01 10:42:09" (1/1) ... [2025-01-08 22:42:10,071 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-01-08 22:42:10,086 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-08 22:42:10,102 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 22:42:10,105 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 22:42:10,130 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2025-01-08 22:42:10,130 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2025-01-08 22:42:10,131 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2025-01-08 22:42:10,131 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2025-01-08 22:42:10,131 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2025-01-08 22:42:10,131 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2025-01-08 22:42:10,131 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2025-01-08 22:42:10,131 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2025-01-08 22:42:10,132 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2025-01-08 22:42:10,132 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2025-01-08 22:42:10,132 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2025-01-08 22:42:10,132 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2025-01-08 22:42:10,132 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2025-01-08 22:42:10,132 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2025-01-08 22:42:10,133 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2025-01-08 22:42:10,133 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#3 [2025-01-08 22:42:10,199 INFO L234 CfgBuilder]: Building ICFG [2025-01-08 22:42:10,201 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2025-01-08 22:42:10,333 INFO L? ?]: Removed 9 outVars from TransFormulas that were not future-live. [2025-01-08 22:42:10,333 INFO L283 CfgBuilder]: Performing block encoding [2025-01-08 22:42:10,341 INFO L307 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2025-01-08 22:42:10,341 INFO L312 CfgBuilder]: Removed 0 assume(true) statements. [2025-01-08 22:42:10,342 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 08.01 10:42:10 BoogieIcfgContainer [2025-01-08 22:42:10,342 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2025-01-08 22:42:10,344 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2025-01-08 22:42:10,344 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2025-01-08 22:42:10,348 INFO L274 PluginConnector]: TraceAbstraction initialized [2025-01-08 22:42:10,349 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 08.01 10:42:09" (1/3) ... [2025-01-08 22:42:10,349 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@34c075d9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 08.01 10:42:10, skipping insertion in model container [2025-01-08 22:42:10,349 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.01 10:42:09" (2/3) ... [2025-01-08 22:42:10,349 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@34c075d9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 08.01 10:42:10, skipping insertion in model container [2025-01-08 22:42:10,350 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 08.01 10:42:10" (3/3) ... [2025-01-08 22:42:10,351 INFO L128 eAbstractionObserver]: Analyzing ICFG nsqm.c [2025-01-08 22:42:10,364 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2025-01-08 22:42:10,366 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG nsqm.c that has 1 procedures, 15 locations, 1 initial locations, 3 loop locations, and 1 error locations. [2025-01-08 22:42:10,409 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2025-01-08 22:42:10,420 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;@3e77ffea, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2025-01-08 22:42:10,420 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2025-01-08 22:42:10,424 INFO L276 IsEmpty]: Start isEmpty. Operand has 15 states, 13 states have (on average 1.5384615384615385) internal successors, (20), 14 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-08 22:42:10,428 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2025-01-08 22:42:10,428 INFO L210 NwaCegarLoop]: Found error trace [2025-01-08 22:42:10,429 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-01-08 22:42:10,429 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-01-08 22:42:10,433 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-08 22:42:10,434 INFO L85 PathProgramCache]: Analyzing trace with hash -1096937326, now seen corresponding path program 1 times [2025-01-08 22:42:10,440 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-08 22:42:10,441 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [81440467] [2025-01-08 22:42:10,441 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-08 22:42:10,442 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-08 22:42:10,516 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 10 statements into 1 equivalence classes. [2025-01-08 22:42:10,537 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 10 of 10 statements. [2025-01-08 22:42:10,538 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-08 22:42:10,539 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-08 22:42:10,613 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 22:42:10,613 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-08 22:42:10,614 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [81440467] [2025-01-08 22:42:10,614 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [81440467] provided 1 perfect and 0 imperfect interpolant sequences [2025-01-08 22:42:10,614 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-01-08 22:42:10,615 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2025-01-08 22:42:10,616 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1435353395] [2025-01-08 22:42:10,616 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-01-08 22:42:10,621 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2025-01-08 22:42:10,621 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-08 22:42:10,638 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2025-01-08 22:42:10,638 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2025-01-08 22:42:10,640 INFO L87 Difference]: Start difference. First operand has 15 states, 13 states have (on average 1.5384615384615385) internal successors, (20), 14 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-08 22:42:10,651 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-01-08 22:42:10,652 INFO L93 Difference]: Finished difference Result 26 states and 34 transitions. [2025-01-08 22:42:10,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2025-01-08 22:42:10,653 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2025-01-08 22:42:10,653 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-01-08 22:42:10,660 INFO L225 Difference]: With dead ends: 26 [2025-01-08 22:42:10,661 INFO L226 Difference]: Without dead ends: 12 [2025-01-08 22:42:10,666 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2025-01-08 22:42:10,669 INFO L435 NwaCegarLoop]: 18 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 18 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-01-08 22:42:10,672 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-01-08 22:42:10,685 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2025-01-08 22:42:10,693 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2025-01-08 22:42:10,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12 states, 11 states have (on average 1.2727272727272727) internal successors, (14), 11 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-08 22:42:10,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 14 transitions. [2025-01-08 22:42:10,700 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 14 transitions. Word has length 10 [2025-01-08 22:42:10,701 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-01-08 22:42:10,701 INFO L471 AbstractCegarLoop]: Abstraction has 12 states and 14 transitions. [2025-01-08 22:42:10,701 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-08 22:42:10,701 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 14 transitions. [2025-01-08 22:42:10,702 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2025-01-08 22:42:10,702 INFO L210 NwaCegarLoop]: Found error trace [2025-01-08 22:42:10,702 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-01-08 22:42:10,703 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2025-01-08 22:42:10,703 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-01-08 22:42:10,704 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-08 22:42:10,704 INFO L85 PathProgramCache]: Analyzing trace with hash 678070036, now seen corresponding path program 1 times [2025-01-08 22:42:10,704 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-08 22:42:10,704 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [659313346] [2025-01-08 22:42:10,704 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-08 22:42:10,704 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-08 22:42:10,729 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 10 statements into 1 equivalence classes. [2025-01-08 22:42:10,774 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 10 of 10 statements. [2025-01-08 22:42:10,775 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-08 22:42:10,775 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unknown [2025-01-08 22:42:10,780 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [189004339] [2025-01-08 22:42:10,782 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-08 22:42:10,782 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-08 22:42:10,783 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-08 22:42:10,786 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 22:42:10,788 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 22:42:10,858 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 10 statements into 1 equivalence classes. [2025-01-08 22:42:10,896 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 10 of 10 statements. [2025-01-08 22:42:10,896 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-08 22:42:10,896 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-08 22:42:10,899 INFO L256 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 11 conjuncts are in the unsatisfiable core [2025-01-08 22:42:10,907 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-08 22:42:10,953 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 13 treesize of output 9 [2025-01-08 22:42:11,031 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 22:42:11,032 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-01-08 22:42:11,032 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-08 22:42:11,032 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [659313346] [2025-01-08 22:42:11,033 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2025-01-08 22:42:11,033 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [189004339] [2025-01-08 22:42:11,033 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [189004339] provided 1 perfect and 0 imperfect interpolant sequences [2025-01-08 22:42:11,033 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-01-08 22:42:11,033 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2025-01-08 22:42:11,034 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1224300056] [2025-01-08 22:42:11,034 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-01-08 22:42:11,034 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-01-08 22:42:11,034 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-08 22:42:11,035 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-01-08 22:42:11,035 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2025-01-08 22:42:11,035 INFO L87 Difference]: Start difference. First operand 12 states and 14 transitions. Second operand has 5 states, 5 states have (on average 2.0) internal successors, (10), 5 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-08 22:42:11,116 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-01-08 22:42:11,116 INFO L93 Difference]: Finished difference Result 23 states and 26 transitions. [2025-01-08 22:42:11,117 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-01-08 22:42:11,117 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 5 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2025-01-08 22:42:11,117 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-01-08 22:42:11,118 INFO L225 Difference]: With dead ends: 23 [2025-01-08 22:42:11,118 INFO L226 Difference]: Without dead ends: 21 [2025-01-08 22:42:11,118 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2025-01-08 22:42:11,119 INFO L435 NwaCegarLoop]: 9 mSDtfsCounter, 11 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-01-08 22:42:11,119 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 24 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-01-08 22:42:11,120 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2025-01-08 22:42:11,122 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 15. [2025-01-08 22:42:11,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 14 states have (on average 1.2857142857142858) internal successors, (18), 14 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-08 22:42:11,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 18 transitions. [2025-01-08 22:42:11,123 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 18 transitions. Word has length 10 [2025-01-08 22:42:11,123 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-01-08 22:42:11,123 INFO L471 AbstractCegarLoop]: Abstraction has 15 states and 18 transitions. [2025-01-08 22:42:11,123 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 5 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-08 22:42:11,124 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 18 transitions. [2025-01-08 22:42:11,124 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2025-01-08 22:42:11,124 INFO L210 NwaCegarLoop]: Found error trace [2025-01-08 22:42:11,124 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-01-08 22:42:11,133 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2025-01-08 22:42:11,325 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 22:42:11,326 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-01-08 22:42:11,327 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-08 22:42:11,327 INFO L85 PathProgramCache]: Analyzing trace with hash -456634480, now seen corresponding path program 1 times [2025-01-08 22:42:11,327 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-08 22:42:11,327 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1455882993] [2025-01-08 22:42:11,327 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-08 22:42:11,327 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-08 22:42:11,341 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 11 statements into 1 equivalence classes. [2025-01-08 22:42:11,366 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 11 of 11 statements. [2025-01-08 22:42:11,367 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-08 22:42:11,368 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-08 22:42:11,514 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-01-08 22:42:11,514 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-08 22:42:11,514 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1455882993] [2025-01-08 22:42:11,514 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1455882993] provided 1 perfect and 0 imperfect interpolant sequences [2025-01-08 22:42:11,515 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-01-08 22:42:11,517 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2025-01-08 22:42:11,517 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1444752014] [2025-01-08 22:42:11,517 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-01-08 22:42:11,518 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-01-08 22:42:11,518 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-08 22:42:11,518 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-01-08 22:42:11,518 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2025-01-08 22:42:11,519 INFO L87 Difference]: Start difference. First operand 15 states and 18 transitions. Second operand has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-08 22:42:11,544 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-01-08 22:42:11,545 INFO L93 Difference]: Finished difference Result 23 states and 29 transitions. [2025-01-08 22:42:11,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-01-08 22:42:11,545 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2025-01-08 22:42:11,545 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-01-08 22:42:11,546 INFO L225 Difference]: With dead ends: 23 [2025-01-08 22:42:11,546 INFO L226 Difference]: Without dead ends: 17 [2025-01-08 22:42:11,546 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2025-01-08 22:42:11,547 INFO L435 NwaCegarLoop]: 10 mSDtfsCounter, 0 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 16 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-01-08 22:42:11,547 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 16 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-01-08 22:42:11,548 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2025-01-08 22:42:11,550 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2025-01-08 22:42:11,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 16 states have (on average 1.3125) internal successors, (21), 16 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-08 22:42:11,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 21 transitions. [2025-01-08 22:42:11,551 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 21 transitions. Word has length 11 [2025-01-08 22:42:11,552 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-01-08 22:42:11,552 INFO L471 AbstractCegarLoop]: Abstraction has 17 states and 21 transitions. [2025-01-08 22:42:11,552 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-08 22:42:11,552 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 21 transitions. [2025-01-08 22:42:11,552 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2025-01-08 22:42:11,552 INFO L210 NwaCegarLoop]: Found error trace [2025-01-08 22:42:11,553 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-01-08 22:42:11,553 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2025-01-08 22:42:11,553 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-01-08 22:42:11,553 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-08 22:42:11,553 INFO L85 PathProgramCache]: Analyzing trace with hash 1132707222, now seen corresponding path program 1 times [2025-01-08 22:42:11,554 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-08 22:42:11,554 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1194437540] [2025-01-08 22:42:11,554 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-08 22:42:11,554 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-08 22:42:11,568 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 12 statements into 1 equivalence classes. [2025-01-08 22:42:11,638 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 12 of 12 statements. [2025-01-08 22:42:11,638 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-08 22:42:11,638 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unknown [2025-01-08 22:42:11,641 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [258488628] [2025-01-08 22:42:11,641 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-08 22:42:11,641 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-08 22:42:11,641 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-08 22:42:11,643 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 22:42:11,646 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 22:42:11,699 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 12 statements into 1 equivalence classes. [2025-01-08 22:42:11,742 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 12 of 12 statements. [2025-01-08 22:42:11,742 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-08 22:42:11,742 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-08 22:42:11,744 INFO L256 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 20 conjuncts are in the unsatisfiable core [2025-01-08 22:42:11,746 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-08 22:42:11,757 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 13 treesize of output 9 [2025-01-08 22:42:11,828 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 13 [2025-01-08 22:42:11,880 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 22:42:11,881 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-01-08 22:42:12,131 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 22:42:12,133 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-08 22:42:12,133 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1194437540] [2025-01-08 22:42:12,133 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2025-01-08 22:42:12,133 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [258488628] [2025-01-08 22:42:12,133 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [258488628] provided 0 perfect and 2 imperfect interpolant sequences [2025-01-08 22:42:12,134 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2025-01-08 22:42:12,134 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 9 [2025-01-08 22:42:12,134 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1032221126] [2025-01-08 22:42:12,134 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2025-01-08 22:42:12,135 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2025-01-08 22:42:12,135 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-08 22:42:12,135 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2025-01-08 22:42:12,136 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2025-01-08 22:42:12,137 INFO L87 Difference]: Start difference. First operand 17 states and 21 transitions. Second operand has 9 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 9 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-08 22:42:12,330 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-01-08 22:42:12,331 INFO L93 Difference]: Finished difference Result 40 states and 47 transitions. [2025-01-08 22:42:12,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2025-01-08 22:42:12,331 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 9 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2025-01-08 22:42:12,332 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-01-08 22:42:12,334 INFO L225 Difference]: With dead ends: 40 [2025-01-08 22:42:12,334 INFO L226 Difference]: Without dead ends: 38 [2025-01-08 22:42:12,334 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2025-01-08 22:42:12,336 INFO L435 NwaCegarLoop]: 8 mSDtfsCounter, 22 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 67 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 74 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 67 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2025-01-08 22:42:12,337 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 40 Invalid, 74 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 67 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2025-01-08 22:42:12,337 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2025-01-08 22:42:12,340 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 19. [2025-01-08 22:42:12,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 18 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-08 22:42:12,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 25 transitions. [2025-01-08 22:42:12,344 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 25 transitions. Word has length 12 [2025-01-08 22:42:12,344 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-01-08 22:42:12,345 INFO L471 AbstractCegarLoop]: Abstraction has 19 states and 25 transitions. [2025-01-08 22:42:12,345 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 9 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-08 22:42:12,345 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 25 transitions. [2025-01-08 22:42:12,345 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2025-01-08 22:42:12,345 INFO L210 NwaCegarLoop]: Found error trace [2025-01-08 22:42:12,346 INFO L218 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-01-08 22:42:12,353 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 22:42:12,546 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 22:42:12,546 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-01-08 22:42:12,547 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-08 22:42:12,547 INFO L85 PathProgramCache]: Analyzing trace with hash 1158045836, now seen corresponding path program 1 times [2025-01-08 22:42:12,547 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-08 22:42:12,547 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1623859916] [2025-01-08 22:42:12,547 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-08 22:42:12,547 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-08 22:42:12,558 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 13 statements into 1 equivalence classes. [2025-01-08 22:42:12,572 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 13 of 13 statements. [2025-01-08 22:42:12,575 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-08 22:42:12,575 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-08 22:42:12,711 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-01-08 22:42:12,711 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-08 22:42:12,711 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1623859916] [2025-01-08 22:42:12,711 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1623859916] provided 0 perfect and 1 imperfect interpolant sequences [2025-01-08 22:42:12,711 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2082540801] [2025-01-08 22:42:12,711 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-08 22:42:12,712 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-08 22:42:12,712 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-08 22:42:12,717 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 22:42:12,718 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 22:42:12,764 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 13 statements into 1 equivalence classes. [2025-01-08 22:42:12,783 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 13 of 13 statements. [2025-01-08 22:42:12,784 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-08 22:42:12,784 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-08 22:42:12,785 INFO L256 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 5 conjuncts are in the unsatisfiable core [2025-01-08 22:42:12,786 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-08 22:42:12,839 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-01-08 22:42:12,840 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-01-08 22:42:12,841 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2082540801] provided 1 perfect and 0 imperfect interpolant sequences [2025-01-08 22:42:12,842 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2025-01-08 22:42:12,842 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 9 [2025-01-08 22:42:12,842 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1501315212] [2025-01-08 22:42:12,842 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-01-08 22:42:12,842 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2025-01-08 22:42:12,842 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-08 22:42:12,843 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2025-01-08 22:42:12,843 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2025-01-08 22:42:12,843 INFO L87 Difference]: Start difference. First operand 19 states and 25 transitions. Second operand has 6 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 6 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-08 22:42:12,931 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-01-08 22:42:12,931 INFO L93 Difference]: Finished difference Result 33 states and 39 transitions. [2025-01-08 22:42:12,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2025-01-08 22:42:12,932 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 6 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 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 22:42:12,932 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-01-08 22:42:12,933 INFO L225 Difference]: With dead ends: 33 [2025-01-08 22:42:12,933 INFO L226 Difference]: Without dead ends: 23 [2025-01-08 22:42:12,933 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2025-01-08 22:42:12,934 INFO L435 NwaCegarLoop]: 8 mSDtfsCounter, 6 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-01-08 22:42:12,935 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 23 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-01-08 22:42:12,935 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2025-01-08 22:42:12,939 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 18. [2025-01-08 22:42:12,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 17 states have (on average 1.2941176470588236) internal successors, (22), 17 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-08 22:42:12,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 22 transitions. [2025-01-08 22:42:12,939 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 22 transitions. Word has length 13 [2025-01-08 22:42:12,940 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-01-08 22:42:12,940 INFO L471 AbstractCegarLoop]: Abstraction has 18 states and 22 transitions. [2025-01-08 22:42:12,940 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 6 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-08 22:42:12,940 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 22 transitions. [2025-01-08 22:42:12,940 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2025-01-08 22:42:12,940 INFO L210 NwaCegarLoop]: Found error trace [2025-01-08 22:42:12,940 INFO L218 NwaCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-01-08 22:42:12,948 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 22:42:13,140 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 22:42:13,141 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-01-08 22:42:13,141 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-08 22:42:13,141 INFO L85 PathProgramCache]: Analyzing trace with hash 1841902742, now seen corresponding path program 2 times [2025-01-08 22:42:13,141 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-08 22:42:13,141 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [43496289] [2025-01-08 22:42:13,142 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-01-08 22:42:13,142 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-08 22:42:13,153 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 14 statements into 2 equivalence classes. [2025-01-08 22:42:13,185 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 14 of 14 statements. [2025-01-08 22:42:13,189 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-01-08 22:42:13,190 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-08 22:42:13,385 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-01-08 22:42:13,385 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-08 22:42:13,385 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [43496289] [2025-01-08 22:42:13,385 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [43496289] provided 0 perfect and 1 imperfect interpolant sequences [2025-01-08 22:42:13,385 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2116960125] [2025-01-08 22:42:13,386 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-01-08 22:42:13,386 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-08 22:42:13,386 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-08 22:42:13,388 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 22:42:13,390 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 22:42:13,439 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 14 statements into 2 equivalence classes. [2025-01-08 22:42:13,460 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 14 of 14 statements. [2025-01-08 22:42:13,460 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-01-08 22:42:13,460 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-08 22:42:13,461 INFO L256 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 6 conjuncts are in the unsatisfiable core [2025-01-08 22:42:13,462 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-08 22:42:13,507 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-01-08 22:42:13,507 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-01-08 22:42:13,540 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-01-08 22:42:13,540 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2116960125] provided 0 perfect and 2 imperfect interpolant sequences [2025-01-08 22:42:13,540 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-01-08 22:42:13,540 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 11 [2025-01-08 22:42:13,541 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2017334234] [2025-01-08 22:42:13,541 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-01-08 22:42:13,541 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2025-01-08 22:42:13,541 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-08 22:42:13,541 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2025-01-08 22:42:13,541 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2025-01-08 22:42:13,542 INFO L87 Difference]: Start difference. First operand 18 states and 22 transitions. Second operand has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-08 22:42:13,628 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-01-08 22:42:13,628 INFO L93 Difference]: Finished difference Result 40 states and 48 transitions. [2025-01-08 22:42:13,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2025-01-08 22:42:13,629 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2025-01-08 22:42:13,629 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-01-08 22:42:13,629 INFO L225 Difference]: With dead ends: 40 [2025-01-08 22:42:13,630 INFO L226 Difference]: Without dead ends: 31 [2025-01-08 22:42:13,630 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2025-01-08 22:42:13,630 INFO L435 NwaCegarLoop]: 8 mSDtfsCounter, 12 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 62 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 51 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-01-08 22:42:13,631 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 32 Invalid, 62 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 51 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-01-08 22:42:13,631 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2025-01-08 22:42:13,635 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 21. [2025-01-08 22:42:13,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 20 states have (on average 1.3) internal successors, (26), 20 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-08 22:42:13,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 26 transitions. [2025-01-08 22:42:13,636 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 26 transitions. Word has length 14 [2025-01-08 22:42:13,636 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-01-08 22:42:13,636 INFO L471 AbstractCegarLoop]: Abstraction has 21 states and 26 transitions. [2025-01-08 22:42:13,636 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-08 22:42:13,637 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 26 transitions. [2025-01-08 22:42:13,637 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2025-01-08 22:42:13,637 INFO L210 NwaCegarLoop]: Found error trace [2025-01-08 22:42:13,637 INFO L218 NwaCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-01-08 22:42:13,645 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2025-01-08 22:42:13,841 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 22:42:13,841 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-01-08 22:42:13,841 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-08 22:42:13,841 INFO L85 PathProgramCache]: Analyzing trace with hash -2093891376, now seen corresponding path program 3 times [2025-01-08 22:42:13,841 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-08 22:42:13,842 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [47950551] [2025-01-08 22:42:13,842 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-01-08 22:42:13,842 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-08 22:42:13,853 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 15 statements into 3 equivalence classes. [2025-01-08 22:42:13,912 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) and asserted 15 of 15 statements. [2025-01-08 22:42:13,915 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2025-01-08 22:42:13,915 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-08 22:42:14,039 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-01-08 22:42:14,040 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-08 22:42:14,040 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [47950551] [2025-01-08 22:42:14,040 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [47950551] provided 0 perfect and 1 imperfect interpolant sequences [2025-01-08 22:42:14,040 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [831884497] [2025-01-08 22:42:14,040 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-01-08 22:42:14,040 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-08 22:42:14,041 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-08 22:42:14,043 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 22:42:14,045 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 22:42:14,092 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 15 statements into 3 equivalence classes. [2025-01-08 22:42:14,196 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) and asserted 15 of 15 statements. [2025-01-08 22:42:14,196 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2025-01-08 22:42:14,196 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-08 22:42:14,197 INFO L256 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 8 conjuncts are in the unsatisfiable core [2025-01-08 22:42:14,199 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-08 22:42:14,269 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-01-08 22:42:14,269 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-01-08 22:42:14,322 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-01-08 22:42:14,322 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [831884497] provided 0 perfect and 2 imperfect interpolant sequences [2025-01-08 22:42:14,322 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-01-08 22:42:14,322 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 13 [2025-01-08 22:42:14,322 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1431049991] [2025-01-08 22:42:14,322 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-01-08 22:42:14,323 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2025-01-08 22:42:14,323 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-08 22:42:14,323 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2025-01-08 22:42:14,324 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=109, Unknown=0, NotChecked=0, Total=156 [2025-01-08 22:42:14,324 INFO L87 Difference]: Start difference. First operand 21 states and 26 transitions. Second operand has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-08 22:42:14,528 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-01-08 22:42:14,528 INFO L93 Difference]: Finished difference Result 55 states and 64 transitions. [2025-01-08 22:42:14,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2025-01-08 22:42:14,529 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2025-01-08 22:42:14,529 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-01-08 22:42:14,529 INFO L225 Difference]: With dead ends: 55 [2025-01-08 22:42:14,529 INFO L226 Difference]: Without dead ends: 47 [2025-01-08 22:42:14,530 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 21 SyntacticMatches, 4 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=109, Invalid=271, Unknown=0, NotChecked=0, Total=380 [2025-01-08 22:42:14,530 INFO L435 NwaCegarLoop]: 11 mSDtfsCounter, 24 mSDsluCounter, 56 mSDsCounter, 0 mSdLazyCounter, 99 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 67 SdHoareTripleChecker+Invalid, 122 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 99 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-01-08 22:42:14,530 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [24 Valid, 67 Invalid, 122 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 99 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-01-08 22:42:14,531 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2025-01-08 22:42:14,540 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 30. [2025-01-08 22:42:14,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 29 states have (on average 1.2758620689655173) internal successors, (37), 29 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-08 22:42:14,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 37 transitions. [2025-01-08 22:42:14,541 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 37 transitions. Word has length 15 [2025-01-08 22:42:14,541 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-01-08 22:42:14,541 INFO L471 AbstractCegarLoop]: Abstraction has 30 states and 37 transitions. [2025-01-08 22:42:14,541 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-08 22:42:14,541 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 37 transitions. [2025-01-08 22:42:14,542 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2025-01-08 22:42:14,542 INFO L210 NwaCegarLoop]: Found error trace [2025-01-08 22:42:14,542 INFO L218 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-01-08 22:42:14,550 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2025-01-08 22:42:14,747 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 22:42:14,747 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-01-08 22:42:14,747 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-08 22:42:14,747 INFO L85 PathProgramCache]: Analyzing trace with hash -1072397622, now seen corresponding path program 1 times [2025-01-08 22:42:14,747 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-08 22:42:14,748 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [271375318] [2025-01-08 22:42:14,748 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-08 22:42:14,748 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-08 22:42:14,756 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 15 statements into 1 equivalence classes. [2025-01-08 22:42:14,798 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 15 of 15 statements. [2025-01-08 22:42:14,798 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-08 22:42:14,798 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unknown [2025-01-08 22:42:14,800 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1204467669] [2025-01-08 22:42:14,800 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-08 22:42:14,800 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-08 22:42:14,800 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-08 22:42:14,802 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 22:42:14,804 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 22:42:14,861 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 15 statements into 1 equivalence classes. [2025-01-08 22:42:14,898 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 15 of 15 statements. [2025-01-08 22:42:14,899 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-08 22:42:14,899 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-08 22:42:14,900 INFO L256 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 37 conjuncts are in the unsatisfiable core [2025-01-08 22:42:14,903 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-08 22:42:14,916 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 13 treesize of output 9 [2025-01-08 22:42:14,924 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2025-01-08 22:42:14,957 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2025-01-08 22:42:15,005 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 22 [2025-01-08 22:42:15,152 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-01-08 22:42:15,152 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-01-08 22:42:15,621 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-01-08 22:42:15,621 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-08 22:42:15,621 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [271375318] [2025-01-08 22:42:15,621 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2025-01-08 22:42:15,621 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1204467669] [2025-01-08 22:42:15,621 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1204467669] provided 0 perfect and 2 imperfect interpolant sequences [2025-01-08 22:42:15,621 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2025-01-08 22:42:15,622 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 17 [2025-01-08 22:42:15,622 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2060686680] [2025-01-08 22:42:15,622 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2025-01-08 22:42:15,622 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2025-01-08 22:42:15,623 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-08 22:42:15,623 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2025-01-08 22:42:15,623 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=216, Unknown=0, NotChecked=0, Total=272 [2025-01-08 22:42:15,623 INFO L87 Difference]: Start difference. First operand 30 states and 37 transitions. Second operand has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 17 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-08 22:42:16,258 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-01-08 22:42:16,258 INFO L93 Difference]: Finished difference Result 53 states and 60 transitions. [2025-01-08 22:42:16,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2025-01-08 22:42:16,259 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 17 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2025-01-08 22:42:16,260 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-01-08 22:42:16,260 INFO L225 Difference]: With dead ends: 53 [2025-01-08 22:42:16,261 INFO L226 Difference]: Without dead ends: 44 [2025-01-08 22:42:16,261 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=138, Invalid=414, Unknown=0, NotChecked=0, Total=552 [2025-01-08 22:42:16,262 INFO L435 NwaCegarLoop]: 9 mSDtfsCounter, 61 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 132 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 66 SdHoareTripleChecker+Invalid, 147 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 132 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2025-01-08 22:42:16,262 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [61 Valid, 66 Invalid, 147 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 132 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2025-01-08 22:42:16,263 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2025-01-08 22:42:16,273 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 31. [2025-01-08 22:42:16,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 30 states have (on average 1.2) internal successors, (36), 30 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-08 22:42:16,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 36 transitions. [2025-01-08 22:42:16,275 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 36 transitions. Word has length 15 [2025-01-08 22:42:16,275 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-01-08 22:42:16,276 INFO L471 AbstractCegarLoop]: Abstraction has 31 states and 36 transitions. [2025-01-08 22:42:16,276 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 17 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-08 22:42:16,276 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 36 transitions. [2025-01-08 22:42:16,276 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2025-01-08 22:42:16,276 INFO L210 NwaCegarLoop]: Found error trace [2025-01-08 22:42:16,276 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-01-08 22:42:16,284 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 22:42:16,477 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2025-01-08 22:42:16,477 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-01-08 22:42:16,477 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-08 22:42:16,477 INFO L85 PathProgramCache]: Analyzing trace with hash 450542550, now seen corresponding path program 4 times [2025-01-08 22:42:16,477 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-08 22:42:16,477 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1903000183] [2025-01-08 22:42:16,477 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-01-08 22:42:16,478 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-08 22:42:16,490 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 16 statements into 2 equivalence classes. [2025-01-08 22:42:16,524 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 16 of 16 statements. [2025-01-08 22:42:16,524 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-01-08 22:42:16,525 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unknown [2025-01-08 22:42:16,526 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [369740004] [2025-01-08 22:42:16,526 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-01-08 22:42:16,526 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-08 22:42:16,526 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-08 22:42:16,529 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 22:42:16,531 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 22:42:16,585 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 16 statements into 2 equivalence classes. [2025-01-08 22:42:16,781 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 16 of 16 statements. [2025-01-08 22:42:16,781 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-01-08 22:42:16,781 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-08 22:42:16,783 INFO L256 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 33 conjuncts are in the unsatisfiable core [2025-01-08 22:42:16,785 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-08 22:42:16,793 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 13 treesize of output 9 [2025-01-08 22:42:16,846 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2025-01-08 22:42:16,874 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2025-01-08 22:42:16,894 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2025-01-08 22:42:16,930 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-01-08 22:42:16,930 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-01-08 22:42:21,567 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-01-08 22:42:21,568 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-08 22:42:21,568 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1903000183] [2025-01-08 22:42:21,568 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2025-01-08 22:42:21,568 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [369740004] [2025-01-08 22:42:21,568 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [369740004] provided 0 perfect and 2 imperfect interpolant sequences [2025-01-08 22:42:21,568 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2025-01-08 22:42:21,568 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2025-01-08 22:42:21,568 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2122856851] [2025-01-08 22:42:21,569 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2025-01-08 22:42:21,569 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2025-01-08 22:42:21,569 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-08 22:42:21,569 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2025-01-08 22:42:21,570 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2025-01-08 22:42:21,571 INFO L87 Difference]: Start difference. First operand 31 states and 36 transitions. Second operand has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-08 22:42:22,267 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-01-08 22:42:22,267 INFO L93 Difference]: Finished difference Result 80 states and 92 transitions. [2025-01-08 22:42:22,268 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2025-01-08 22:42:22,268 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), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2025-01-08 22:42:22,269 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-01-08 22:42:22,270 INFO L225 Difference]: With dead ends: 80 [2025-01-08 22:42:22,270 INFO L226 Difference]: Without dead ends: 78 [2025-01-08 22:42:22,270 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=85, Invalid=187, Unknown=0, NotChecked=0, Total=272 [2025-01-08 22:42:22,271 INFO L435 NwaCegarLoop]: 14 mSDtfsCounter, 69 mSDsluCounter, 70 mSDsCounter, 0 mSdLazyCounter, 155 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 84 SdHoareTripleChecker+Invalid, 173 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 155 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2025-01-08 22:42:22,271 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [69 Valid, 84 Invalid, 173 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 155 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2025-01-08 22:42:22,271 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2025-01-08 22:42:22,284 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 35. [2025-01-08 22:42:22,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 34 states have (on average 1.2941176470588236) internal successors, (44), 34 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-08 22:42:22,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 44 transitions. [2025-01-08 22:42:22,285 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 44 transitions. Word has length 16 [2025-01-08 22:42:22,285 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-01-08 22:42:22,285 INFO L471 AbstractCegarLoop]: Abstraction has 35 states and 44 transitions. [2025-01-08 22:42:22,285 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), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-08 22:42:22,285 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 44 transitions. [2025-01-08 22:42:22,286 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2025-01-08 22:42:22,286 INFO L210 NwaCegarLoop]: Found error trace [2025-01-08 22:42:22,286 INFO L218 NwaCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-01-08 22:42:22,295 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2025-01-08 22:42:22,486 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-08 22:42:22,486 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-01-08 22:42:22,487 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-08 22:42:22,487 INFO L85 PathProgramCache]: Analyzing trace with hash -1254890614, now seen corresponding path program 2 times [2025-01-08 22:42:22,487 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-08 22:42:22,487 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [273382799] [2025-01-08 22:42:22,487 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-01-08 22:42:22,487 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-08 22:42:22,494 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 17 statements into 2 equivalence classes. [2025-01-08 22:42:22,506 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 17 of 17 statements. [2025-01-08 22:42:22,506 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-01-08 22:42:22,506 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-08 22:42:22,620 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-01-08 22:42:22,621 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-08 22:42:22,621 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [273382799] [2025-01-08 22:42:22,621 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [273382799] provided 0 perfect and 1 imperfect interpolant sequences [2025-01-08 22:42:22,621 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [526277899] [2025-01-08 22:42:22,621 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-01-08 22:42:22,622 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-08 22:42:22,622 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-08 22:42:22,624 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-01-08 22:42:22,626 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2025-01-08 22:42:22,676 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 17 statements into 2 equivalence classes. [2025-01-08 22:42:22,697 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 17 of 17 statements. [2025-01-08 22:42:22,697 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-01-08 22:42:22,697 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-08 22:42:22,698 INFO L256 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 7 conjuncts are in the unsatisfiable core [2025-01-08 22:42:22,699 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-08 22:42:22,745 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-01-08 22:42:22,746 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-01-08 22:42:22,796 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-01-08 22:42:22,797 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [526277899] provided 0 perfect and 2 imperfect interpolant sequences [2025-01-08 22:42:22,797 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-01-08 22:42:22,797 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 14 [2025-01-08 22:42:22,797 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [734564661] [2025-01-08 22:42:22,797 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-01-08 22:42:22,797 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2025-01-08 22:42:22,797 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-08 22:42:22,798 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2025-01-08 22:42:22,798 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2025-01-08 22:42:22,798 INFO L87 Difference]: Start difference. First operand 35 states and 44 transitions. Second operand has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 14 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-08 22:42:23,054 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-01-08 22:42:23,054 INFO L93 Difference]: Finished difference Result 66 states and 75 transitions. [2025-01-08 22:42:23,054 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2025-01-08 22:42:23,055 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 14 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2025-01-08 22:42:23,055 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-01-08 22:42:23,055 INFO L225 Difference]: With dead ends: 66 [2025-01-08 22:42:23,055 INFO L226 Difference]: Without dead ends: 54 [2025-01-08 22:42:23,056 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 25 SyntacticMatches, 3 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 156 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=176, Invalid=474, Unknown=0, NotChecked=0, Total=650 [2025-01-08 22:42:23,057 INFO L435 NwaCegarLoop]: 22 mSDtfsCounter, 76 mSDsluCounter, 59 mSDsCounter, 0 mSdLazyCounter, 135 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 76 SdHoareTripleChecker+Valid, 81 SdHoareTripleChecker+Invalid, 161 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 135 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-01-08 22:42:23,057 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [76 Valid, 81 Invalid, 161 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 135 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-01-08 22:42:23,058 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2025-01-08 22:42:23,066 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 30. [2025-01-08 22:42:23,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 29 states have (on average 1.2758620689655173) internal successors, (37), 29 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-08 22:42:23,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 37 transitions. [2025-01-08 22:42:23,067 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 37 transitions. Word has length 17 [2025-01-08 22:42:23,068 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-01-08 22:42:23,068 INFO L471 AbstractCegarLoop]: Abstraction has 30 states and 37 transitions. [2025-01-08 22:42:23,068 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 14 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-08 22:42:23,068 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 37 transitions. [2025-01-08 22:42:23,069 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2025-01-08 22:42:23,069 INFO L210 NwaCegarLoop]: Found error trace [2025-01-08 22:42:23,069 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-01-08 22:42:23,078 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2025-01-08 22:42:23,269 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,9 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-08 22:42:23,270 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-01-08 22:42:23,271 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-08 22:42:23,271 INFO L85 PathProgramCache]: Analyzing trace with hash 345103498, now seen corresponding path program 3 times [2025-01-08 22:42:23,271 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-08 22:42:23,271 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1413264356] [2025-01-08 22:42:23,271 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-01-08 22:42:23,271 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-08 22:42:23,281 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 19 statements into 3 equivalence classes. [2025-01-08 22:42:23,372 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) and asserted 19 of 19 statements. [2025-01-08 22:42:23,372 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2025-01-08 22:42:23,372 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unknown [2025-01-08 22:42:23,373 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [671389877] [2025-01-08 22:42:23,373 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-01-08 22:42:23,373 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-08 22:42:23,374 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-08 22:42:23,375 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-01-08 22:42:23,378 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2025-01-08 22:42:23,428 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 19 statements into 3 equivalence classes. [2025-01-08 22:42:23,829 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) and asserted 19 of 19 statements. [2025-01-08 22:42:23,830 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2025-01-08 22:42:23,830 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-08 22:42:23,833 INFO L256 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 58 conjuncts are in the unsatisfiable core [2025-01-08 22:42:23,837 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-08 22:42:23,892 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 13 treesize of output 9 [2025-01-08 22:42:23,904 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2025-01-08 22:42:23,945 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2025-01-08 22:42:23,996 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2025-01-08 22:42:24,045 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2025-01-08 22:42:24,123 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2025-01-08 22:42:24,166 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-01-08 22:42:24,166 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 21 [2025-01-08 22:42:24,209 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-01-08 22:42:24,209 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 21 [2025-01-08 22:42:24,344 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-01-08 22:42:24,345 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-01-08 22:42:39,040 WARN L286 SmtUtils]: Spent 12.04s on a formula simplification that was a NOOP. DAG size: 7 (called from [L 728] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2025-01-08 22:43:07,151 WARN L286 SmtUtils]: Spent 20.04s on a formula simplification. DAG size of input: 32 DAG size of output: 11 (called from [L 728] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2025-01-08 22:43:23,267 WARN L286 SmtUtils]: Spent 8.01s on a formula simplification that was a NOOP. DAG size: 7 (called from [L 728] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify)