./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/list-ext3-properties/dll_circular_traversal-2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version da043454 Calling Ultimate with: /root/.sdkman/candidates/java/21.0.5-tem/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.6.800.v20240513-1750.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../../../trunk/examples/svcomp/list-ext3-properties/dll_circular_traversal-2.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/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 4fb6aa6206205a747f158782e93b3c9333c1a2cdc4e8dab70046fca960e31961 --- Real Ultimate output --- This is Ultimate 0.3.0-wip.fs.system-includes-da04345-m [2025-04-30 10:10:44,794 INFO L188 SettingsManager]: Resetting all preferences to default values... [2025-04-30 10:10:44,846 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2025-04-30 10:10:44,851 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2025-04-30 10:10:44,853 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2025-04-30 10:10:44,877 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2025-04-30 10:10:44,878 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2025-04-30 10:10:44,879 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2025-04-30 10:10:44,879 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2025-04-30 10:10:44,879 INFO L153 SettingsManager]: * Use memory slicer=true [2025-04-30 10:10:44,879 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2025-04-30 10:10:44,880 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2025-04-30 10:10:44,880 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2025-04-30 10:10:44,880 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2025-04-30 10:10:44,880 INFO L153 SettingsManager]: * Use SBE=true [2025-04-30 10:10:44,881 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2025-04-30 10:10:44,881 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2025-04-30 10:10:44,881 INFO L153 SettingsManager]: * sizeof long=4 [2025-04-30 10:10:44,881 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2025-04-30 10:10:44,881 INFO L153 SettingsManager]: * sizeof POINTER=4 [2025-04-30 10:10:44,881 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2025-04-30 10:10:44,881 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2025-04-30 10:10:44,881 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2025-04-30 10:10:44,881 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2025-04-30 10:10:44,881 INFO L153 SettingsManager]: * sizeof long double=12 [2025-04-30 10:10:44,882 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2025-04-30 10:10:44,882 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2025-04-30 10:10:44,882 INFO L153 SettingsManager]: * Use constant arrays=true [2025-04-30 10:10:44,882 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2025-04-30 10:10:44,882 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2025-04-30 10:10:44,882 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2025-04-30 10:10:44,882 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2025-04-30 10:10:44,882 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-04-30 10:10:44,883 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2025-04-30 10:10:44,883 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2025-04-30 10:10:44,883 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2025-04-30 10:10:44,883 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2025-04-30 10:10:44,883 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-04-30 10:10:44,883 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2025-04-30 10:10:44,883 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2025-04-30 10:10:44,883 INFO L153 SettingsManager]: * Compute procedure contracts=false [2025-04-30 10:10:44,883 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2025-04-30 10:10:44,883 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2025-04-30 10:10:44,883 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2025-04-30 10:10:44,883 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2025-04-30 10:10:44,883 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2025-04-30 10:10:44,883 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2025-04-30 10:10:44,883 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/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 -> 4fb6aa6206205a747f158782e93b3c9333c1a2cdc4e8dab70046fca960e31961 [2025-04-30 10:10:45,081 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2025-04-30 10:10:45,086 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2025-04-30 10:10:45,090 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2025-04-30 10:10:45,091 INFO L270 PluginConnector]: Initializing CDTParser... [2025-04-30 10:10:45,092 INFO L274 PluginConnector]: CDTParser initialized [2025-04-30 10:10:45,092 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/list-ext3-properties/dll_circular_traversal-2.i [2025-04-30 10:10:46,339 INFO L538 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b31906d56/45ca4978742d4a299d88b02d991e3dce/FLAGc9dea8727 [2025-04-30 10:10:46,563 INFO L389 CDTParser]: Found 1 translation units. [2025-04-30 10:10:46,564 INFO L178 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/list-ext3-properties/dll_circular_traversal-2.i [2025-04-30 10:10:46,575 INFO L432 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b31906d56/45ca4978742d4a299d88b02d991e3dce/FLAGc9dea8727 [2025-04-30 10:10:47,389 INFO L440 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b31906d56/45ca4978742d4a299d88b02d991e3dce [2025-04-30 10:10:47,391 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2025-04-30 10:10:47,392 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2025-04-30 10:10:47,393 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2025-04-30 10:10:47,393 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2025-04-30 10:10:47,396 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2025-04-30 10:10:47,396 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.04 10:10:47" (1/1) ... [2025-04-30 10:10:47,397 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1e9f9a6d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.04 10:10:47, skipping insertion in model container [2025-04-30 10:10:47,397 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.04 10:10:47" (1/1) ... [2025-04-30 10:10:47,421 INFO L175 MainTranslator]: Built tables and reachable declarations [2025-04-30 10:10:47,634 WARN L117 LibraryModelHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/list-ext3-properties/dll_circular_traversal-2.i[24211,24224] [2025-04-30 10:10:47,638 INFO L211 PostProcessor]: Analyzing one entry point: main [2025-04-30 10:10:47,646 INFO L200 MainTranslator]: Completed pre-run [2025-04-30 10:10:47,682 WARN L117 LibraryModelHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/list-ext3-properties/dll_circular_traversal-2.i[24211,24224] [2025-04-30 10:10:47,683 INFO L211 PostProcessor]: Analyzing one entry point: main [2025-04-30 10:10:47,706 INFO L204 MainTranslator]: Completed translation [2025-04-30 10:10:47,707 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.04 10:10:47 WrapperNode [2025-04-30 10:10:47,707 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2025-04-30 10:10:47,708 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2025-04-30 10:10:47,708 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2025-04-30 10:10:47,708 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2025-04-30 10:10:47,711 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.04 10:10:47" (1/1) ... [2025-04-30 10:10:47,719 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.04 10:10:47" (1/1) ... [2025-04-30 10:10:47,732 INFO L138 Inliner]: procedures = 122, calls = 27, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 88 [2025-04-30 10:10:47,734 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2025-04-30 10:10:47,734 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2025-04-30 10:10:47,734 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2025-04-30 10:10:47,735 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2025-04-30 10:10:47,741 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.04 10:10:47" (1/1) ... [2025-04-30 10:10:47,741 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.04 10:10:47" (1/1) ... [2025-04-30 10:10:47,743 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.04 10:10:47" (1/1) ... [2025-04-30 10:10:47,756 INFO L175 MemorySlicer]: Split 17 memory accesses to 2 slices as follows [2, 15]. 88 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0]. The 10 writes are split as follows [0, 10]. [2025-04-30 10:10:47,756 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.04 10:10:47" (1/1) ... [2025-04-30 10:10:47,756 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.04 10:10:47" (1/1) ... [2025-04-30 10:10:47,761 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.04 10:10:47" (1/1) ... [2025-04-30 10:10:47,761 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.04 10:10:47" (1/1) ... [2025-04-30 10:10:47,763 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.04 10:10:47" (1/1) ... [2025-04-30 10:10:47,764 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.04 10:10:47" (1/1) ... [2025-04-30 10:10:47,765 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.04 10:10:47" (1/1) ... [2025-04-30 10:10:47,767 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2025-04-30 10:10:47,768 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2025-04-30 10:10:47,768 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2025-04-30 10:10:47,768 INFO L274 PluginConnector]: RCFGBuilder initialized [2025-04-30 10:10:47,768 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.04 10:10:47" (1/1) ... [2025-04-30 10:10:47,772 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-04-30 10:10:47,780 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-30 10:10:47,791 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2025-04-30 10:10:47,793 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2025-04-30 10:10:47,807 INFO L130 BoogieDeclarations]: Found specification of procedure myexit [2025-04-30 10:10:47,807 INFO L138 BoogieDeclarations]: Found implementation of procedure myexit [2025-04-30 10:10:47,807 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2025-04-30 10:10:47,807 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2025-04-30 10:10:47,807 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2025-04-30 10:10:47,807 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2025-04-30 10:10:47,807 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2025-04-30 10:10:47,807 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2025-04-30 10:10:47,807 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#0 [2025-04-30 10:10:47,807 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#1 [2025-04-30 10:10:47,807 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#0 [2025-04-30 10:10:47,807 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#1 [2025-04-30 10:10:47,807 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2025-04-30 10:10:47,807 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2025-04-30 10:10:47,807 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2025-04-30 10:10:47,807 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2025-04-30 10:10:47,808 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2025-04-30 10:10:47,881 INFO L234 CfgBuilder]: Building ICFG [2025-04-30 10:10:47,882 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2025-04-30 10:10:47,895 INFO L726 $ProcedureCfgBuilder]: dead code at ProgramPoint myexitFINAL: assume true; [2025-04-30 10:10:47,988 INFO L? ?]: Removed 19 outVars from TransFormulas that were not future-live. [2025-04-30 10:10:47,988 INFO L283 CfgBuilder]: Performing block encoding [2025-04-30 10:10:47,994 INFO L307 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2025-04-30 10:10:47,994 INFO L312 CfgBuilder]: Removed 2 assume(true) statements. [2025-04-30 10:10:47,994 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.04 10:10:47 BoogieIcfgContainer [2025-04-30 10:10:47,995 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2025-04-30 10:10:47,996 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2025-04-30 10:10:47,996 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2025-04-30 10:10:47,999 INFO L274 PluginConnector]: TraceAbstraction initialized [2025-04-30 10:10:47,999 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 30.04 10:10:47" (1/3) ... [2025-04-30 10:10:48,000 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5f55a137 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.04 10:10:47, skipping insertion in model container [2025-04-30 10:10:48,000 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.04 10:10:47" (2/3) ... [2025-04-30 10:10:48,000 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5f55a137 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.04 10:10:48, skipping insertion in model container [2025-04-30 10:10:48,000 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.04 10:10:47" (3/3) ... [2025-04-30 10:10:48,001 INFO L128 eAbstractionObserver]: Analyzing ICFG dll_circular_traversal-2.i [2025-04-30 10:10:48,010 INFO L217 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2025-04-30 10:10:48,011 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG dll_circular_traversal-2.i that has 2 procedures, 26 locations, 37 edges, 1 initial locations, 3 loop locations, and 1 error locations. [2025-04-30 10:10:48,046 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2025-04-30 10:10:48,056 INFO L340 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;@2ba101ce, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2025-04-30 10:10:48,057 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2025-04-30 10:10:48,059 INFO L278 IsEmpty]: Start isEmpty. Operand has 25 states, 21 states have (on average 1.4761904761904763) internal successors, (31), 23 states have internal predecessors, (31), 2 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-30 10:10:48,063 INFO L284 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2025-04-30 10:10:48,063 INFO L210 NwaCegarLoop]: Found error trace [2025-04-30 10:10:48,063 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-30 10:10:48,064 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-04-30 10:10:48,067 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-30 10:10:48,067 INFO L85 PathProgramCache]: Analyzing trace with hash 2075710269, now seen corresponding path program 1 times [2025-04-30 10:10:48,072 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-30 10:10:48,073 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1303241643] [2025-04-30 10:10:48,074 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-04-30 10:10:48,074 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-30 10:10:48,143 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 9 statements into 1 equivalence classes. [2025-04-30 10:10:48,173 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 9 of 9 statements. [2025-04-30 10:10:48,174 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-30 10:10:48,174 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-30 10:10:48,584 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-30 10:10:48,586 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-30 10:10:48,586 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1303241643] [2025-04-30 10:10:48,586 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1303241643] provided 1 perfect and 0 imperfect interpolant sequences [2025-04-30 10:10:48,586 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-04-30 10:10:48,587 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2025-04-30 10:10:48,588 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [373462272] [2025-04-30 10:10:48,588 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-04-30 10:10:48,590 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2025-04-30 10:10:48,590 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-30 10:10:48,604 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2025-04-30 10:10:48,604 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2025-04-30 10:10:48,606 INFO L87 Difference]: Start difference. First operand has 25 states, 21 states have (on average 1.4761904761904763) internal successors, (31), 23 states have internal predecessors, (31), 2 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 7 states, 7 states have (on average 1.2857142857142858) internal successors, (9), 7 states have internal predecessors, (9), 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) [2025-04-30 10:10:48,752 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-04-30 10:10:48,753 INFO L93 Difference]: Finished difference Result 42 states and 56 transitions. [2025-04-30 10:10:48,754 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2025-04-30 10:10:48,755 INFO L79 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 1.2857142857142858) internal successors, (9), 7 states have internal predecessors, (9), 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 9 [2025-04-30 10:10:48,755 INFO L85 Accepts]: Finished accepts. some prefix is accepted. [2025-04-30 10:10:48,759 INFO L225 Difference]: With dead ends: 42 [2025-04-30 10:10:48,759 INFO L226 Difference]: Without dead ends: 23 [2025-04-30 10:10:48,761 INFO L436 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2025-04-30 10:10:48,764 INFO L437 NwaCegarLoop]: 22 mSDtfsCounter, 14 mSDsluCounter, 78 mSDsCounter, 0 mSdLazyCounter, 71 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 100 SdHoareTripleChecker+Invalid, 71 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 71 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-04-30 10:10:48,766 INFO L438 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 100 Invalid, 71 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 71 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-04-30 10:10:48,775 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2025-04-30 10:10:48,783 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 21. [2025-04-30 10:10:48,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 20 states have (on average 1.25) internal successors, (25), 20 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) [2025-04-30 10:10:48,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 25 transitions. [2025-04-30 10:10:48,788 INFO L79 Accepts]: Start accepts. Automaton has 21 states and 25 transitions. Word has length 9 [2025-04-30 10:10:48,788 INFO L85 Accepts]: Finished accepts. word is rejected. [2025-04-30 10:10:48,788 INFO L485 AbstractCegarLoop]: Abstraction has 21 states and 25 transitions. [2025-04-30 10:10:48,789 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 1.2857142857142858) internal successors, (9), 7 states have internal predecessors, (9), 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) [2025-04-30 10:10:48,789 INFO L278 IsEmpty]: Start isEmpty. Operand 21 states and 25 transitions. [2025-04-30 10:10:48,790 INFO L284 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2025-04-30 10:10:48,790 INFO L210 NwaCegarLoop]: Found error trace [2025-04-30 10:10:48,790 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-30 10:10:48,791 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2025-04-30 10:10:48,791 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-04-30 10:10:48,791 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-30 10:10:48,792 INFO L85 PathProgramCache]: Analyzing trace with hash 1323672658, now seen corresponding path program 1 times [2025-04-30 10:10:48,792 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-30 10:10:48,792 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [327880574] [2025-04-30 10:10:48,792 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-04-30 10:10:48,792 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-30 10:10:48,813 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 12 statements into 1 equivalence classes. [2025-04-30 10:10:48,819 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 12 of 12 statements. [2025-04-30 10:10:48,823 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-30 10:10:48,824 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-30 10:10:48,897 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-30 10:10:48,897 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-30 10:10:48,897 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [327880574] [2025-04-30 10:10:48,897 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [327880574] provided 0 perfect and 1 imperfect interpolant sequences [2025-04-30 10:10:48,897 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [3565093] [2025-04-30 10:10:48,897 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-04-30 10:10:48,897 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-30 10:10:48,897 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-30 10:10:48,899 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-04-30 10:10:48,902 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2025-04-30 10:10:48,963 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 12 statements into 1 equivalence classes. [2025-04-30 10:10:48,994 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 12 of 12 statements. [2025-04-30 10:10:48,994 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-30 10:10:48,994 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-30 10:10:48,996 INFO L256 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 5 conjuncts are in the unsatisfiable core [2025-04-30 10:10:49,000 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-30 10:10:49,029 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-30 10:10:49,029 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-04-30 10:10:49,053 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-30 10:10:49,053 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [3565093] provided 0 perfect and 2 imperfect interpolant sequences [2025-04-30 10:10:49,053 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-04-30 10:10:49,053 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 6 [2025-04-30 10:10:49,054 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [522129914] [2025-04-30 10:10:49,054 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-04-30 10:10:49,054 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2025-04-30 10:10:49,054 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-30 10:10:49,055 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2025-04-30 10:10:49,055 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2025-04-30 10:10:49,055 INFO L87 Difference]: Start difference. First operand 21 states and 25 transitions. Second operand has 6 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 6 states have internal predecessors, (19), 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) [2025-04-30 10:10:49,082 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-04-30 10:10:49,082 INFO L93 Difference]: Finished difference Result 40 states and 49 transitions. [2025-04-30 10:10:49,082 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2025-04-30 10:10:49,082 INFO L79 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 6 states have internal predecessors, (19), 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 [2025-04-30 10:10:49,082 INFO L85 Accepts]: Finished accepts. some prefix is accepted. [2025-04-30 10:10:49,083 INFO L225 Difference]: With dead ends: 40 [2025-04-30 10:10:49,083 INFO L226 Difference]: Without dead ends: 27 [2025-04-30 10:10:49,083 INFO L436 NwaCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2025-04-30 10:10:49,084 INFO L437 NwaCegarLoop]: 18 mSDtfsCounter, 4 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-04-30 10:10:49,084 INFO L438 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 33 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-04-30 10:10:49,084 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2025-04-30 10:10:49,086 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2025-04-30 10:10:49,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 26 states have (on average 1.1538461538461537) internal successors, (30), 26 states have internal predecessors, (30), 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) [2025-04-30 10:10:49,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 30 transitions. [2025-04-30 10:10:49,087 INFO L79 Accepts]: Start accepts. Automaton has 27 states and 30 transitions. Word has length 12 [2025-04-30 10:10:49,087 INFO L85 Accepts]: Finished accepts. word is rejected. [2025-04-30 10:10:49,087 INFO L485 AbstractCegarLoop]: Abstraction has 27 states and 30 transitions. [2025-04-30 10:10:49,087 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 6 states have internal predecessors, (19), 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) [2025-04-30 10:10:49,087 INFO L278 IsEmpty]: Start isEmpty. Operand 27 states and 30 transitions. [2025-04-30 10:10:49,088 INFO L284 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2025-04-30 10:10:49,088 INFO L210 NwaCegarLoop]: Found error trace [2025-04-30 10:10:49,088 INFO L218 NwaCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-30 10:10:49,095 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2025-04-30 10:10:49,292 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-30 10:10:49,292 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-04-30 10:10:49,293 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-30 10:10:49,293 INFO L85 PathProgramCache]: Analyzing trace with hash 141050621, now seen corresponding path program 2 times [2025-04-30 10:10:49,293 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-30 10:10:49,293 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1553287010] [2025-04-30 10:10:49,293 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-04-30 10:10:49,293 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-30 10:10:49,318 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 21 statements into 2 equivalence classes. [2025-04-30 10:10:49,375 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 21 of 21 statements. [2025-04-30 10:10:49,376 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-04-30 10:10:49,376 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-30 10:10:49,973 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 11 proven. 6 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2025-04-30 10:10:49,973 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-30 10:10:49,974 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1553287010] [2025-04-30 10:10:49,974 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1553287010] provided 0 perfect and 1 imperfect interpolant sequences [2025-04-30 10:10:49,974 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1617662516] [2025-04-30 10:10:49,974 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-04-30 10:10:49,974 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-30 10:10:49,974 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-30 10:10:49,977 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-04-30 10:10:49,978 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2025-04-30 10:10:50,046 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 21 statements into 2 equivalence classes. [2025-04-30 10:10:50,089 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 21 of 21 statements. [2025-04-30 10:10:50,089 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-04-30 10:10:50,089 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-30 10:10:50,096 INFO L256 TraceCheckSpWp]: Trace formula consists of 319 conjuncts, 43 conjuncts are in the unsatisfiable core [2025-04-30 10:10:50,098 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-30 10:10:50,176 INFO L354 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2025-04-30 10:10:50,246 INFO L325 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2025-04-30 10:10:50,246 INFO L354 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2025-04-30 10:10:50,289 INFO L354 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 16 [2025-04-30 10:10:50,292 INFO L354 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 16 treesize of output 11 [2025-04-30 10:10:50,354 INFO L325 Elim1Store]: treesize reduction 34, result has 44.3 percent of original size [2025-04-30 10:10:50,355 INFO L354 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 66 treesize of output 97 [2025-04-30 10:10:50,384 INFO L172 IndexEqualityManager]: detected equality via solver [2025-04-30 10:10:50,385 INFO L354 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 18 treesize of output 11 [2025-04-30 10:10:50,483 INFO L189 IndexEqualityManager]: detected not equals via solver [2025-04-30 10:10:50,508 INFO L325 Elim1Store]: treesize reduction 21, result has 38.2 percent of original size [2025-04-30 10:10:50,509 INFO L354 Elim1Store]: Elim1 eliminated variable of array dimension 1, 3 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 136 treesize of output 208 [2025-04-30 10:10:50,619 INFO L354 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 14 treesize of output 3 [2025-04-30 10:10:50,622 INFO L354 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2025-04-30 10:10:50,699 INFO L189 IndexEqualityManager]: detected not equals via solver [2025-04-30 10:10:50,719 INFO L325 Elim1Store]: treesize reduction 46, result has 38.7 percent of original size [2025-04-30 10:10:50,720 INFO L354 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 180 treesize of output 211 [2025-04-30 10:10:50,800 INFO L189 IndexEqualityManager]: detected not equals via solver [2025-04-30 10:10:50,807 INFO L325 Elim1Store]: treesize reduction 22, result has 4.3 percent of original size [2025-04-30 10:10:50,807 INFO L354 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 57 treesize of output 37 [2025-04-30 10:10:50,901 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 11 proven. 6 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2025-04-30 10:10:50,902 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-04-30 10:10:50,982 INFO L325 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-04-30 10:10:50,982 INFO L354 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 48 treesize of output 40 [2025-04-30 10:10:50,989 INFO L325 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-04-30 10:10:50,989 INFO L354 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 160 treesize of output 160 [2025-04-30 10:10:51,009 INFO L325 Elim1Store]: treesize reduction 16, result has 61.9 percent of original size [2025-04-30 10:10:51,010 INFO L354 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 62 treesize of output 76 [2025-04-30 10:10:51,032 INFO L354 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2025-04-30 10:10:51,070 INFO L325 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-04-30 10:10:51,070 INFO L354 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 53 [2025-04-30 10:10:51,128 INFO L325 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-04-30 10:10:51,129 INFO L354 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 49 [2025-04-30 10:10:51,167 INFO L354 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2025-04-30 10:10:51,178 INFO L354 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 33 [2025-04-30 10:10:51,334 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2025-04-30 10:10:51,335 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1617662516] provided 0 perfect and 2 imperfect interpolant sequences [2025-04-30 10:10:51,335 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-04-30 10:10:51,335 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 24 [2025-04-30 10:10:51,335 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [242076984] [2025-04-30 10:10:51,335 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-04-30 10:10:51,336 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2025-04-30 10:10:51,336 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-30 10:10:51,336 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2025-04-30 10:10:51,336 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=475, Unknown=5, NotChecked=0, Total=552 [2025-04-30 10:10:51,337 INFO L87 Difference]: Start difference. First operand 27 states and 30 transitions. Second operand has 24 states, 24 states have (on average 2.0) internal successors, (48), 24 states have internal predecessors, (48), 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) [2025-04-30 10:10:51,654 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-04-30 10:10:51,654 INFO L93 Difference]: Finished difference Result 31 states and 34 transitions. [2025-04-30 10:10:51,654 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2025-04-30 10:10:51,654 INFO L79 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.0) internal successors, (48), 24 states have internal predecessors, (48), 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 21 [2025-04-30 10:10:51,655 INFO L85 Accepts]: Finished accepts. some prefix is accepted. [2025-04-30 10:10:51,655 INFO L225 Difference]: With dead ends: 31 [2025-04-30 10:10:51,655 INFO L226 Difference]: Without dead ends: 29 [2025-04-30 10:10:51,655 INFO L436 NwaCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 160 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=167, Invalid=820, Unknown=5, NotChecked=0, Total=992 [2025-04-30 10:10:51,656 INFO L437 NwaCegarLoop]: 12 mSDtfsCounter, 8 mSDsluCounter, 125 mSDsCounter, 0 mSdLazyCounter, 216 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 137 SdHoareTripleChecker+Invalid, 220 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 216 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2025-04-30 10:10:51,656 INFO L438 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 137 Invalid, 220 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 216 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2025-04-30 10:10:51,656 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2025-04-30 10:10:51,658 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2025-04-30 10:10:51,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 28 states have (on average 1.1428571428571428) internal successors, (32), 28 states have internal predecessors, (32), 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) [2025-04-30 10:10:51,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 32 transitions. [2025-04-30 10:10:51,659 INFO L79 Accepts]: Start accepts. Automaton has 29 states and 32 transitions. Word has length 21 [2025-04-30 10:10:51,659 INFO L85 Accepts]: Finished accepts. word is rejected. [2025-04-30 10:10:51,659 INFO L485 AbstractCegarLoop]: Abstraction has 29 states and 32 transitions. [2025-04-30 10:10:51,659 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.0) internal successors, (48), 24 states have internal predecessors, (48), 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) [2025-04-30 10:10:51,659 INFO L278 IsEmpty]: Start isEmpty. Operand 29 states and 32 transitions. [2025-04-30 10:10:51,659 INFO L284 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2025-04-30 10:10:51,659 INFO L210 NwaCegarLoop]: Found error trace [2025-04-30 10:10:51,659 INFO L218 NwaCegarLoop]: trace histogram [4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-30 10:10:51,666 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2025-04-30 10:10:51,863 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2025-04-30 10:10:51,863 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-04-30 10:10:51,863 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-30 10:10:51,864 INFO L85 PathProgramCache]: Analyzing trace with hash 1562082501, now seen corresponding path program 1 times [2025-04-30 10:10:51,864 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-30 10:10:51,864 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2144780429] [2025-04-30 10:10:51,864 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-04-30 10:10:51,864 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-30 10:10:51,881 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 24 statements into 1 equivalence classes. [2025-04-30 10:10:51,931 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 24 of 24 statements. [2025-04-30 10:10:51,931 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-30 10:10:51,931 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-30 10:10:52,960 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 3 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-30 10:10:52,960 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-30 10:10:52,960 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2144780429] [2025-04-30 10:10:52,960 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2144780429] provided 0 perfect and 1 imperfect interpolant sequences [2025-04-30 10:10:52,960 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1344183496] [2025-04-30 10:10:52,960 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-04-30 10:10:52,960 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-30 10:10:52,960 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-30 10:10:52,962 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-04-30 10:10:52,964 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2025-04-30 10:10:53,030 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 24 statements into 1 equivalence classes. [2025-04-30 10:10:53,070 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 24 of 24 statements. [2025-04-30 10:10:53,071 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-30 10:10:53,071 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-30 10:10:53,073 INFO L256 TraceCheckSpWp]: Trace formula consists of 342 conjuncts, 87 conjuncts are in the unsatisfiable core [2025-04-30 10:10:53,077 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-30 10:10:53,083 INFO L354 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2025-04-30 10:10:53,112 INFO L325 Elim1Store]: treesize reduction 20, result has 33.3 percent of original size [2025-04-30 10:10:53,113 INFO L354 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 16 [2025-04-30 10:10:53,144 INFO L325 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2025-04-30 10:10:53,144 INFO L354 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2025-04-30 10:10:53,216 INFO L325 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2025-04-30 10:10:53,216 INFO L354 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 22 treesize of output 33 [2025-04-30 10:10:53,292 INFO L354 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 16 [2025-04-30 10:10:53,296 INFO L354 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2025-04-30 10:10:53,366 INFO L325 Elim1Store]: treesize reduction 12, result has 52.0 percent of original size [2025-04-30 10:10:53,366 INFO L354 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 25 [2025-04-30 10:10:53,403 INFO L354 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 39 [2025-04-30 10:10:53,408 INFO L354 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 31 [2025-04-30 10:10:53,411 INFO L189 IndexEqualityManager]: detected not equals via solver [2025-04-30 10:10:53,413 INFO L354 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 31 [2025-04-30 10:10:53,421 INFO L354 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 23 [2025-04-30 10:10:53,434 INFO L325 Elim1Store]: treesize reduction 19, result has 20.8 percent of original size [2025-04-30 10:10:53,435 INFO L354 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 69 treesize of output 60 [2025-04-30 10:10:53,438 INFO L354 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 11 [2025-04-30 10:10:53,442 INFO L354 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 26 treesize of output 15 [2025-04-30 10:10:53,464 INFO L354 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 30 [2025-04-30 10:10:53,469 INFO L189 IndexEqualityManager]: detected not equals via solver [2025-04-30 10:10:53,471 INFO L354 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 23 [2025-04-30 10:10:53,474 INFO L189 IndexEqualityManager]: detected not equals via solver [2025-04-30 10:10:53,476 INFO L354 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 46 treesize of output 39 [2025-04-30 10:10:53,479 INFO L354 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 19 [2025-04-30 10:10:53,482 INFO L354 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 20 treesize of output 15 [2025-04-30 10:10:53,487 INFO L354 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 18 treesize of output 11 [2025-04-30 10:10:53,566 INFO L354 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 35 treesize of output 19 [2025-04-30 10:10:53,581 INFO L354 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 20 treesize of output 15 [2025-04-30 10:10:53,584 INFO L354 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 15 [2025-04-30 10:10:53,587 INFO L354 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 7 treesize of output 3 [2025-04-30 10:10:53,623 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 8 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-04-30 10:10:53,623 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-04-30 10:10:53,633 WARN L849 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_567 (Array Int Int))) (= |c_ULTIMATE.start_main_~data_init~0#1| (let ((.cse0 (+ |c_ULTIMATE.start_main_~ptr~0#1.offset| 4))) (select (select (store |c_#memory_int#1| |c_ULTIMATE.start_main_~ptr~0#1.base| v_ArrVal_567) (select (select |c_#memory_$Pointer$#1.base| |c_ULTIMATE.start_main_~ptr~0#1.base|) .cse0)) (select (select |c_#memory_$Pointer$#1.offset| |c_ULTIMATE.start_main_~ptr~0#1.base|) .cse0))))) is different from false [2025-04-30 10:10:53,675 WARN L849 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_565 Int) (v_ArrVal_567 (Array Int Int)) (v_ArrVal_558 (Array Int Int)) (v_ArrVal_562 (Array Int Int))) (= (let ((.cse0 (+ 4 |c_ULTIMATE.start_dll_circular_create_~head~0#1.offset|))) (select (select (store (store |c_#memory_int#1| |c_ULTIMATE.start_dll_circular_create_~last~0#1.base| (store (select |c_#memory_int#1| |c_ULTIMATE.start_dll_circular_create_~last~0#1.base|) (+ |c_ULTIMATE.start_dll_circular_create_~last~0#1.offset| 4) v_ArrVal_565)) |c_ULTIMATE.start_dll_circular_create_~head~0#1.base| v_ArrVal_567) (select (select (store |c_#memory_$Pointer$#1.base| |c_ULTIMATE.start_dll_circular_create_~last~0#1.base| v_ArrVal_558) |c_ULTIMATE.start_dll_circular_create_~head~0#1.base|) .cse0)) (select (select (store |c_#memory_$Pointer$#1.offset| |c_ULTIMATE.start_dll_circular_create_~last~0#1.base| v_ArrVal_562) |c_ULTIMATE.start_dll_circular_create_~head~0#1.base|) .cse0))) |c_ULTIMATE.start_main_~data_init~0#1|)) is different from false [2025-04-30 10:10:53,687 INFO L325 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-04-30 10:10:53,687 INFO L354 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 98 treesize of output 96 [2025-04-30 10:10:53,692 INFO L354 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 358 treesize of output 356 [2025-04-30 10:10:53,697 INFO L354 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 342 treesize of output 334 [2025-04-30 10:10:53,706 INFO L325 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-04-30 10:10:53,707 INFO L354 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 334 treesize of output 300 [2025-04-30 10:10:53,718 INFO L354 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 140 treesize of output 136 [2025-04-30 10:10:53,721 INFO L354 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 1016 treesize of output 986 [2025-04-30 10:10:53,728 INFO L354 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 120 treesize of output 116 [2025-04-30 10:10:53,731 INFO L354 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 234 treesize of output 226 [2025-04-30 10:10:54,447 INFO L325 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-04-30 10:10:54,447 INFO L354 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 57 treesize of output 55 [2025-04-30 10:10:54,462 INFO L325 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-04-30 10:10:54,462 INFO L354 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 32 [2025-04-30 10:10:54,487 INFO L325 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-04-30 10:10:54,487 INFO L354 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 22 [2025-04-30 10:10:54,983 INFO L325 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-04-30 10:10:54,984 INFO L354 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 7595 treesize of output 7443 [2025-04-30 10:10:55,035 INFO L325 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-04-30 10:10:55,036 INFO L354 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 743 treesize of output 733 [2025-04-30 10:10:55,058 INFO L325 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-04-30 10:10:55,058 INFO L354 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 550 treesize of output 542 [2025-04-30 10:10:55,082 INFO L325 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-04-30 10:10:55,082 INFO L354 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 616 treesize of output 584 [2025-04-30 10:10:55,406 INFO L354 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2025-04-30 10:10:56,281 INFO L354 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 177 treesize of output 167 [2025-04-30 10:10:56,375 INFO L325 Elim1Store]: treesize reduction 30, result has 65.1 percent of original size [2025-04-30 10:10:56,375 INFO L354 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 2408 treesize of output 2359 [2025-04-30 10:10:56,389 INFO L172 IndexEqualityManager]: detected equality via solver [2025-04-30 10:10:56,405 INFO L325 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-04-30 10:10:56,406 INFO L354 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 153 treesize of output 167 [2025-04-30 10:10:56,422 INFO L325 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-04-30 10:10:56,422 INFO L354 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 308 treesize of output 306 [2025-04-30 10:10:56,439 INFO L325 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-04-30 10:10:56,439 INFO L354 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 284 treesize of output 268 [2025-04-30 10:10:56,459 INFO L325 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-04-30 10:10:56,460 INFO L354 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 171 treesize of output 171 [2025-04-30 10:10:56,638 INFO L354 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2025-04-30 10:10:58,106 INFO L354 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2025-04-30 10:10:58,162 INFO L325 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-04-30 10:10:58,162 INFO L354 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 189 treesize of output 201 [2025-04-30 10:10:59,444 INFO L172 IndexEqualityManager]: detected equality via solver [2025-04-30 10:10:59,445 INFO L172 IndexEqualityManager]: detected equality via solver [2025-04-30 10:10:59,500 INFO L325 Elim1Store]: treesize reduction 34, result has 58.5 percent of original size [2025-04-30 10:10:59,501 INFO L354 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 7 case distinctions, treesize of input 15091 treesize of output 14806 [2025-04-30 10:10:59,524 INFO L354 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 1337 treesize of output 1301 [2025-04-30 10:10:59,574 INFO L325 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-04-30 10:10:59,575 INFO L354 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 157 treesize of output 169 [2025-04-30 10:10:59,608 INFO L325 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-04-30 10:10:59,608 INFO L354 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 943 treesize of output 935 [2025-04-30 10:10:59,645 INFO L354 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 114 treesize of output 98 [2025-04-30 10:11:01,390 INFO L354 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2025-04-30 10:11:01,399 INFO L354 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2025-04-30 10:11:01,685 INFO L354 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 20 [2025-04-30 10:11:01,826 INFO L172 IndexEqualityManager]: detected equality via solver [2025-04-30 10:11:01,827 INFO L172 IndexEqualityManager]: detected equality via solver [2025-04-30 10:11:01,844 INFO L325 Elim1Store]: treesize reduction 13, result has 69.0 percent of original size [2025-04-30 10:11:01,844 INFO L354 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 254 treesize of output 238 [2025-04-30 10:11:01,851 INFO L325 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-04-30 10:11:01,851 INFO L354 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 146 treesize of output 144 [2025-04-30 10:11:01,855 INFO L354 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 138 treesize of output 132 [2025-04-30 10:11:01,929 INFO L172 IndexEqualityManager]: detected equality via solver [2025-04-30 10:11:01,929 INFO L172 IndexEqualityManager]: detected equality via solver [2025-04-30 10:11:01,977 INFO L325 Elim1Store]: treesize reduction 34, result has 58.5 percent of original size [2025-04-30 10:11:01,977 INFO L354 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 7 case distinctions, treesize of input 51451 treesize of output 47446 [2025-04-30 10:11:02,049 INFO L325 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-04-30 10:11:02,050 INFO L354 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 1658 treesize of output 1638 [2025-04-30 10:11:02,092 INFO L325 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-04-30 10:11:02,093 INFO L354 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 2127 treesize of output 2081 [2025-04-30 10:11:02,128 INFO L354 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 1942 treesize of output 1878 [2025-04-30 10:11:02,502 INFO L354 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 212 treesize of output 208 [2025-04-30 10:11:05,489 INFO L354 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 29 [2025-04-30 10:11:05,551 INFO L172 IndexEqualityManager]: detected equality via solver [2025-04-30 10:11:07,430 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 8 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 6 not checked. [2025-04-30 10:11:07,430 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1344183496] provided 0 perfect and 2 imperfect interpolant sequences [2025-04-30 10:11:07,430 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-04-30 10:11:07,430 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 13, 13] total 32 [2025-04-30 10:11:07,431 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [665749612] [2025-04-30 10:11:07,431 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-04-30 10:11:07,431 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2025-04-30 10:11:07,431 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-30 10:11:07,431 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2025-04-30 10:11:07,432 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=750, Unknown=20, NotChecked=114, Total=992 [2025-04-30 10:11:07,432 INFO L87 Difference]: Start difference. First operand 29 states and 32 transitions. Second operand has 32 states, 32 states have (on average 1.84375) internal successors, (59), 32 states have internal predecessors, (59), 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) [2025-04-30 10:11:13,242 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-04-30 10:11:13,242 INFO L93 Difference]: Finished difference Result 35 states and 39 transitions. [2025-04-30 10:11:13,242 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2025-04-30 10:11:13,242 INFO L79 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.84375) internal successors, (59), 32 states have internal predecessors, (59), 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 24 [2025-04-30 10:11:13,243 INFO L85 Accepts]: Finished accepts. some prefix is accepted. [2025-04-30 10:11:13,243 INFO L225 Difference]: With dead ends: 35 [2025-04-30 10:11:13,243 INFO L226 Difference]: Without dead ends: 33 [2025-04-30 10:11:13,244 INFO L436 NwaCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 345 ImplicationChecksByTransitivity, 6.8s TimeCoverageRelationStatistics Valid=206, Invalid=1257, Unknown=27, NotChecked=150, Total=1640 [2025-04-30 10:11:13,244 INFO L437 NwaCegarLoop]: 8 mSDtfsCounter, 6 mSDsluCounter, 53 mSDsCounter, 0 mSdLazyCounter, 268 mSolverCounterSat, 3 mSolverCounterUnsat, 45 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 61 SdHoareTripleChecker+Invalid, 368 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 268 IncrementalHoareTripleChecker+Invalid, 45 IncrementalHoareTripleChecker+Unknown, 52 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2025-04-30 10:11:13,244 INFO L438 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 61 Invalid, 368 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 268 Invalid, 45 Unknown, 52 Unchecked, 1.7s Time] [2025-04-30 10:11:13,244 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2025-04-30 10:11:13,247 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 32. [2025-04-30 10:11:13,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 31 states have (on average 1.1612903225806452) internal successors, (36), 31 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) [2025-04-30 10:11:13,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 36 transitions. [2025-04-30 10:11:13,248 INFO L79 Accepts]: Start accepts. Automaton has 32 states and 36 transitions. Word has length 24 [2025-04-30 10:11:13,248 INFO L85 Accepts]: Finished accepts. word is rejected. [2025-04-30 10:11:13,248 INFO L485 AbstractCegarLoop]: Abstraction has 32 states and 36 transitions. [2025-04-30 10:11:13,248 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 1.84375) internal successors, (59), 32 states have internal predecessors, (59), 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) [2025-04-30 10:11:13,248 INFO L278 IsEmpty]: Start isEmpty. Operand 32 states and 36 transitions. [2025-04-30 10:11:13,248 INFO L284 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2025-04-30 10:11:13,248 INFO L210 NwaCegarLoop]: Found error trace [2025-04-30 10:11:13,248 INFO L218 NwaCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-30 10:11:13,254 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2025-04-30 10:11:13,450 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-30 10:11:13,450 INFO L403 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-04-30 10:11:13,450 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-30 10:11:13,450 INFO L85 PathProgramCache]: Analyzing trace with hash 1182226195, now seen corresponding path program 1 times [2025-04-30 10:11:13,450 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-30 10:11:13,450 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1238393661] [2025-04-30 10:11:13,450 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-04-30 10:11:13,451 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-30 10:11:13,464 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 25 statements into 1 equivalence classes. [2025-04-30 10:11:13,494 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 25 of 25 statements. [2025-04-30 10:11:13,494 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-30 10:11:13,494 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-30 10:11:13,902 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2025-04-30 10:11:13,902 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-30 10:11:13,902 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1238393661] [2025-04-30 10:11:13,902 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1238393661] provided 0 perfect and 1 imperfect interpolant sequences [2025-04-30 10:11:13,902 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [730216408] [2025-04-30 10:11:13,902 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-04-30 10:11:13,902 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-30 10:11:13,902 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-30 10:11:13,904 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-04-30 10:11:13,905 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2025-04-30 10:11:13,974 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 25 statements into 1 equivalence classes. [2025-04-30 10:11:14,004 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 25 of 25 statements. [2025-04-30 10:11:14,005 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-30 10:11:14,005 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-30 10:11:14,006 INFO L256 TraceCheckSpWp]: Trace formula consists of 367 conjuncts, 47 conjuncts are in the unsatisfiable core [2025-04-30 10:11:14,010 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-30 10:11:14,012 INFO L354 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2025-04-30 10:11:14,029 INFO L325 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2025-04-30 10:11:14,029 INFO L354 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 1 case distinctions, treesize of input 12 treesize of output 14 [2025-04-30 10:11:14,049 INFO L325 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2025-04-30 10:11:14,049 INFO L354 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 1 case distinctions, treesize of input 12 treesize of output 14 [2025-04-30 10:11:14,071 INFO L325 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2025-04-30 10:11:14,072 INFO L354 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2025-04-30 10:11:14,113 INFO L325 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2025-04-30 10:11:14,113 INFO L354 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 16 treesize of output 18 [2025-04-30 10:11:14,133 INFO L354 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 25 [2025-04-30 10:11:14,140 INFO L325 Elim1Store]: treesize reduction 21, result has 19.2 percent of original size [2025-04-30 10:11:14,140 INFO L354 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 41 treesize of output 40 [2025-04-30 10:11:14,163 INFO L189 IndexEqualityManager]: detected not equals via solver [2025-04-30 10:11:14,164 INFO L354 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 43 treesize of output 38 [2025-04-30 10:11:14,167 INFO L354 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 25 treesize of output 14 [2025-04-30 10:11:14,210 INFO L354 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 8 [2025-04-30 10:11:14,212 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 7 proven. 10 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2025-04-30 10:11:14,212 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-04-30 10:11:14,240 WARN L849 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_804 (Array Int Int))) (not (= |c_ULTIMATE.start_dll_circular_create_~head~0#1.base| (select (select (store |c_#memory_$Pointer$#1.base| |c_ULTIMATE.start_dll_circular_create_~last~0#1.base| v_ArrVal_804) |c_ULTIMATE.start_dll_circular_create_~head~0#1.base|) (+ 4 |c_ULTIMATE.start_dll_circular_create_~head~0#1.offset|))))) is different from false [2025-04-30 10:11:14,247 INFO L325 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-04-30 10:11:14,247 INFO L354 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 1 new quantified variables, introduced 2 case distinctions, treesize of input 29 treesize of output 35 [2025-04-30 10:11:14,249 INFO L354 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 149 treesize of output 131 [2025-04-30 10:11:14,252 INFO L354 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 4 [2025-04-30 10:11:14,254 INFO L354 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 4 [2025-04-30 10:11:14,257 INFO L354 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 4 [2025-04-30 10:11:14,415 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 5 trivial. 4 not checked. [2025-04-30 10:11:14,415 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [730216408] provided 0 perfect and 2 imperfect interpolant sequences [2025-04-30 10:11:14,415 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-04-30 10:11:14,416 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 24 [2025-04-30 10:11:14,416 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1973172435] [2025-04-30 10:11:14,416 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-04-30 10:11:14,416 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2025-04-30 10:11:14,416 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-30 10:11:14,416 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2025-04-30 10:11:14,417 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=441, Unknown=1, NotChecked=42, Total=552 [2025-04-30 10:11:14,417 INFO L87 Difference]: Start difference. First operand 32 states and 36 transitions. Second operand has 24 states, 24 states have (on average 2.25) internal successors, (54), 24 states have internal predecessors, (54), 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) [2025-04-30 10:11:14,663 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-04-30 10:11:14,663 INFO L93 Difference]: Finished difference Result 38 states and 42 transitions. [2025-04-30 10:11:14,664 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2025-04-30 10:11:14,664 INFO L79 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.25) internal successors, (54), 24 states have internal predecessors, (54), 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 25 [2025-04-30 10:11:14,664 INFO L85 Accepts]: Finished accepts. some prefix is accepted. [2025-04-30 10:11:14,664 INFO L225 Difference]: With dead ends: 38 [2025-04-30 10:11:14,664 INFO L226 Difference]: Without dead ends: 32 [2025-04-30 10:11:14,665 INFO L436 NwaCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 36 SyntacticMatches, 4 SemanticMatches, 29 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=157, Invalid=716, Unknown=1, NotChecked=56, Total=930 [2025-04-30 10:11:14,665 INFO L437 NwaCegarLoop]: 10 mSDtfsCounter, 9 mSDsluCounter, 68 mSDsCounter, 0 mSdLazyCounter, 184 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 78 SdHoareTripleChecker+Invalid, 208 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 184 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 19 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-04-30 10:11:14,665 INFO L438 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 78 Invalid, 208 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 184 Invalid, 0 Unknown, 19 Unchecked, 0.1s Time] [2025-04-30 10:11:14,665 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2025-04-30 10:11:14,669 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2025-04-30 10:11:14,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 31 states have (on average 1.1290322580645162) internal successors, (35), 31 states have internal predecessors, (35), 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) [2025-04-30 10:11:14,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 35 transitions. [2025-04-30 10:11:14,670 INFO L79 Accepts]: Start accepts. Automaton has 32 states and 35 transitions. Word has length 25 [2025-04-30 10:11:14,670 INFO L85 Accepts]: Finished accepts. word is rejected. [2025-04-30 10:11:14,670 INFO L485 AbstractCegarLoop]: Abstraction has 32 states and 35 transitions. [2025-04-30 10:11:14,670 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.25) internal successors, (54), 24 states have internal predecessors, (54), 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) [2025-04-30 10:11:14,670 INFO L278 IsEmpty]: Start isEmpty. Operand 32 states and 35 transitions. [2025-04-30 10:11:14,670 INFO L284 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2025-04-30 10:11:14,670 INFO L210 NwaCegarLoop]: Found error trace [2025-04-30 10:11:14,670 INFO L218 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-30 10:11:14,676 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2025-04-30 10:11:14,874 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-30 10:11:14,874 INFO L403 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-04-30 10:11:14,874 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-30 10:11:14,874 INFO L85 PathProgramCache]: Analyzing trace with hash 30182909, now seen corresponding path program 2 times [2025-04-30 10:11:14,874 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-30 10:11:14,874 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1276467340] [2025-04-30 10:11:14,874 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-04-30 10:11:14,874 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-30 10:11:14,888 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 27 statements into 2 equivalence classes. [2025-04-30 10:11:14,945 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 27 of 27 statements. [2025-04-30 10:11:14,945 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-04-30 10:11:14,945 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-30 10:11:16,561 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-30 10:11:16,561 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-30 10:11:16,561 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1276467340] [2025-04-30 10:11:16,561 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1276467340] provided 0 perfect and 1 imperfect interpolant sequences [2025-04-30 10:11:16,561 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [302089237] [2025-04-30 10:11:16,562 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-04-30 10:11:16,562 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-30 10:11:16,562 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-30 10:11:16,565 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-04-30 10:11:16,567 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2025-04-30 10:11:16,656 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 27 statements into 2 equivalence classes. [2025-04-30 10:11:16,704 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 27 of 27 statements. [2025-04-30 10:11:16,704 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-04-30 10:11:16,704 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-30 10:11:16,706 INFO L256 TraceCheckSpWp]: Trace formula consists of 365 conjuncts, 121 conjuncts are in the unsatisfiable core [2025-04-30 10:11:16,712 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-30 10:11:16,715 INFO L354 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2025-04-30 10:11:16,746 INFO L325 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2025-04-30 10:11:16,746 INFO L354 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2025-04-30 10:11:16,843 INFO L325 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2025-04-30 10:11:16,844 INFO L354 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 22 treesize of output 33 [2025-04-30 10:11:16,919 INFO L354 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 16 [2025-04-30 10:11:16,922 INFO L354 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2025-04-30 10:11:17,012 INFO L325 Elim1Store]: treesize reduction 54, result has 34.1 percent of original size [2025-04-30 10:11:17,012 INFO L354 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 27 treesize of output 45 [2025-04-30 10:11:17,125 INFO L189 IndexEqualityManager]: detected not equals via solver [2025-04-30 10:11:17,126 INFO L354 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 34 [2025-04-30 10:11:17,129 INFO L354 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 26 treesize of output 15 [2025-04-30 10:11:17,133 INFO L354 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2025-04-30 10:11:17,143 INFO L354 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2025-04-30 10:11:17,146 INFO L354 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 31 [2025-04-30 10:11:17,149 INFO L354 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 11 [2025-04-30 10:11:17,155 INFO L354 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 19 [2025-04-30 10:11:17,158 INFO L354 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2025-04-30 10:11:17,244 INFO L325 Elim1Store]: treesize reduction 16, result has 56.8 percent of original size [2025-04-30 10:11:17,245 INFO L354 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 30 treesize of output 36 [2025-04-30 10:11:17,349 INFO L354 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 61 treesize of output 20 [2025-04-30 10:11:17,353 INFO L189 IndexEqualityManager]: detected not equals via solver [2025-04-30 10:11:17,356 INFO L354 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 85 treesize of output 64 [2025-04-30 10:11:17,360 INFO L354 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 6 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 18 [2025-04-30 10:11:17,365 INFO L354 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 52 treesize of output 35 [2025-04-30 10:11:17,379 INFO L354 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2025-04-30 10:11:17,444 INFO L354 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 5 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 19 [2025-04-30 10:11:17,448 INFO L189 IndexEqualityManager]: detected not equals via solver [2025-04-30 10:11:17,449 INFO L354 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 32 [2025-04-30 10:11:17,457 INFO L325 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2025-04-30 10:11:17,458 INFO L354 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 106 treesize of output 55 [2025-04-30 10:11:17,638 INFO L354 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 23 [2025-04-30 10:11:17,646 INFO L325 Elim1Store]: treesize reduction 24, result has 4.0 percent of original size [2025-04-30 10:11:17,647 INFO L354 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 128 treesize of output 64 [2025-04-30 10:11:17,651 INFO L189 IndexEqualityManager]: detected not equals via solver [2025-04-30 10:11:17,652 INFO L189 IndexEqualityManager]: detected not equals via solver [2025-04-30 10:11:17,653 INFO L189 IndexEqualityManager]: detected not equals via solver [2025-04-30 10:11:17,656 INFO L354 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 49 treesize of output 43 [2025-04-30 10:11:17,843 INFO L325 Elim1Store]: treesize reduction 208, result has 12.2 percent of original size [2025-04-30 10:11:17,843 INFO L354 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 7 new quantified variables, introduced 10 case distinctions, treesize of input 233 treesize of output 150 [2025-04-30 10:11:17,860 INFO L325 Elim1Store]: treesize reduction 12, result has 52.0 percent of original size [2025-04-30 10:11:17,860 INFO L354 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 139 treesize of output 78 [2025-04-30 10:11:17,868 INFO L354 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 31 [2025-04-30 10:11:17,873 INFO L354 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 5 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2025-04-30 10:11:17,877 INFO L354 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 10 [2025-04-30 10:11:17,956 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 9 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-30 10:11:17,956 INFO L312 TraceCheckSpWp]: Computing backward predicates... Killed by 15