./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/goblint-regression/09-regions_19-nested_nr.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 8fc3dc66 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/AutomizerMemDerefMemtrack.xml -i ../sv-benchmarks/c/goblint-regression/09-regions_19-nested_nr.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-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 valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash e4a3fff277216174585e9d802eee36c2b619da26d56e48ed5261f2ab62942b7a --- Real Ultimate output --- This is Ultimate 0.3.0-?-8fc3dc6-m [2025-03-17 14:17:10,880 INFO L188 SettingsManager]: Resetting all preferences to default values... [2025-03-17 14:17:10,935 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2025-03-17 14:17:10,938 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2025-03-17 14:17:10,941 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2025-03-17 14:17:10,956 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2025-03-17 14:17:10,957 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2025-03-17 14:17:10,958 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2025-03-17 14:17:10,958 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2025-03-17 14:17:10,958 INFO L153 SettingsManager]: * Use memory slicer=true [2025-03-17 14:17:10,959 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2025-03-17 14:17:10,959 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2025-03-17 14:17:10,959 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2025-03-17 14:17:10,959 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2025-03-17 14:17:10,959 INFO L153 SettingsManager]: * Use SBE=true [2025-03-17 14:17:10,959 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2025-03-17 14:17:10,959 INFO L153 SettingsManager]: * sizeof long=4 [2025-03-17 14:17:10,960 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2025-03-17 14:17:10,960 INFO L153 SettingsManager]: * sizeof POINTER=4 [2025-03-17 14:17:10,960 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2025-03-17 14:17:10,960 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2025-03-17 14:17:10,960 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2025-03-17 14:17:10,960 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2025-03-17 14:17:10,960 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2025-03-17 14:17:10,960 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2025-03-17 14:17:10,960 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2025-03-17 14:17:10,960 INFO L153 SettingsManager]: * sizeof long double=12 [2025-03-17 14:17:10,960 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2025-03-17 14:17:10,961 INFO L153 SettingsManager]: * Use constant arrays=true [2025-03-17 14:17:10,961 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2025-03-17 14:17:10,961 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2025-03-17 14:17:10,961 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2025-03-17 14:17:10,961 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2025-03-17 14:17:10,961 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-03-17 14:17:10,961 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2025-03-17 14:17:10,962 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2025-03-17 14:17:10,962 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2025-03-17 14:17:10,962 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2025-03-17 14:17:10,962 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2025-03-17 14:17:10,962 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2025-03-17 14:17:10,962 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2025-03-17 14:17:10,962 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2025-03-17 14:17:10,962 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 valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) 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 -> e4a3fff277216174585e9d802eee36c2b619da26d56e48ed5261f2ab62942b7a [2025-03-17 14:17:11,204 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2025-03-17 14:17:11,209 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2025-03-17 14:17:11,211 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2025-03-17 14:17:11,212 INFO L270 PluginConnector]: Initializing CDTParser... [2025-03-17 14:17:11,212 INFO L274 PluginConnector]: CDTParser initialized [2025-03-17 14:17:11,214 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/goblint-regression/09-regions_19-nested_nr.i [2025-03-17 14:17:12,316 INFO L533 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6325228de/efb9a86108594cca835c2e36efbd47ab/FLAGd9a6c3717 [2025-03-17 14:17:12,606 INFO L384 CDTParser]: Found 1 translation units. [2025-03-17 14:17:12,608 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/goblint-regression/09-regions_19-nested_nr.i [2025-03-17 14:17:12,625 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6325228de/efb9a86108594cca835c2e36efbd47ab/FLAGd9a6c3717 [2025-03-17 14:17:12,891 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6325228de/efb9a86108594cca835c2e36efbd47ab [2025-03-17 14:17:12,893 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2025-03-17 14:17:12,894 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2025-03-17 14:17:12,895 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2025-03-17 14:17:12,895 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2025-03-17 14:17:12,897 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2025-03-17 14:17:12,898 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.03 02:17:12" (1/1) ... [2025-03-17 14:17:12,899 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5a5cebc0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 02:17:12, skipping insertion in model container [2025-03-17 14:17:12,899 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.03 02:17:12" (1/1) ... [2025-03-17 14:17:12,936 INFO L175 MainTranslator]: Built tables and reachable declarations [2025-03-17 14:17:13,340 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-03-17 14:17:13,369 INFO L200 MainTranslator]: Completed pre-run [2025-03-17 14:17:13,410 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-03-17 14:17:13,461 INFO L204 MainTranslator]: Completed translation [2025-03-17 14:17:13,461 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 02:17:13 WrapperNode [2025-03-17 14:17:13,462 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2025-03-17 14:17:13,463 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2025-03-17 14:17:13,463 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2025-03-17 14:17:13,463 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2025-03-17 14:17:13,467 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 02:17:13" (1/1) ... [2025-03-17 14:17:13,479 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 02:17:13" (1/1) ... [2025-03-17 14:17:13,499 INFO L138 Inliner]: procedures = 372, calls = 87, calls flagged for inlining = 9, calls inlined = 9, statements flattened = 180 [2025-03-17 14:17:13,499 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2025-03-17 14:17:13,499 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2025-03-17 14:17:13,500 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2025-03-17 14:17:13,500 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2025-03-17 14:17:13,508 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 02:17:13" (1/1) ... [2025-03-17 14:17:13,509 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 02:17:13" (1/1) ... [2025-03-17 14:17:13,516 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 02:17:13" (1/1) ... [2025-03-17 14:17:13,536 INFO L175 MemorySlicer]: Split 78 memory accesses to 2 slices as follows [64, 14]. 82 percent of accesses are in the largest equivalence class. The 60 initializations are split as follows [60, 0]. The 11 writes are split as follows [1, 10]. [2025-03-17 14:17:13,536 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 02:17:13" (1/1) ... [2025-03-17 14:17:13,537 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 02:17:13" (1/1) ... [2025-03-17 14:17:13,544 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 02:17:13" (1/1) ... [2025-03-17 14:17:13,545 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 02:17:13" (1/1) ... [2025-03-17 14:17:13,546 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 02:17:13" (1/1) ... [2025-03-17 14:17:13,549 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 02:17:13" (1/1) ... [2025-03-17 14:17:13,551 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2025-03-17 14:17:13,552 INFO L112 PluginConnector]: ------------------------IcfgBuilder---------------------------- [2025-03-17 14:17:13,554 INFO L270 PluginConnector]: Initializing IcfgBuilder... [2025-03-17 14:17:13,554 INFO L274 PluginConnector]: IcfgBuilder initialized [2025-03-17 14:17:13,555 INFO L184 PluginConnector]: Executing the observer IcfgBuilderObserver from plugin IcfgBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 02:17:13" (1/1) ... [2025-03-17 14:17:13,558 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-03-17 14:17:13,568 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-17 14:17:13,581 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) [2025-03-17 14:17:13,584 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 [2025-03-17 14:17:13,601 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#0 [2025-03-17 14:17:13,601 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#1 [2025-03-17 14:17:13,601 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#0 [2025-03-17 14:17:13,601 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#1 [2025-03-17 14:17:13,601 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexUnlock [2025-03-17 14:17:13,601 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2025-03-17 14:17:13,601 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2025-03-17 14:17:13,601 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2025-03-17 14:17:13,601 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2025-03-17 14:17:13,601 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2025-03-17 14:17:13,601 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2025-03-17 14:17:13,601 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2025-03-17 14:17:13,601 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#0 [2025-03-17 14:17:13,601 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#1 [2025-03-17 14:17:13,601 INFO L130 BoogieDeclarations]: Found specification of procedure t_fun [2025-03-17 14:17:13,602 INFO L138 BoogieDeclarations]: Found implementation of procedure t_fun [2025-03-17 14:17:13,602 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2025-03-17 14:17:13,602 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2025-03-17 14:17:13,602 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2025-03-17 14:17:13,602 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2025-03-17 14:17:13,604 WARN L225 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2025-03-17 14:17:13,720 INFO L256 CfgBuilder]: Building ICFG [2025-03-17 14:17:13,722 INFO L286 CfgBuilder]: Building CFG for each procedure with an implementation [2025-03-17 14:17:14,083 INFO L303 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2025-03-17 14:17:14,083 INFO L307 CfgBuilder]: Performing block encoding [2025-03-17 14:17:14,277 INFO L331 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2025-03-17 14:17:14,277 INFO L336 CfgBuilder]: Removed 0 assume(true) statements. [2025-03-17 14:17:14,278 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 17.03 02:17:14 BoogieIcfgContainer [2025-03-17 14:17:14,278 INFO L131 PluginConnector]: ------------------------ END IcfgBuilder---------------------------- [2025-03-17 14:17:14,279 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2025-03-17 14:17:14,279 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2025-03-17 14:17:14,282 INFO L274 PluginConnector]: TraceAbstraction initialized [2025-03-17 14:17:14,283 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.03 02:17:12" (1/3) ... [2025-03-17 14:17:14,283 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@73d0b0d7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.03 02:17:14, skipping insertion in model container [2025-03-17 14:17:14,283 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 02:17:13" (2/3) ... [2025-03-17 14:17:14,283 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@73d0b0d7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.03 02:17:14, skipping insertion in model container [2025-03-17 14:17:14,283 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 17.03 02:17:14" (3/3) ... [2025-03-17 14:17:14,284 INFO L128 eAbstractionObserver]: Analyzing ICFG 09-regions_19-nested_nr.i [2025-03-17 14:17:14,293 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2025-03-17 14:17:14,294 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG 09-regions_19-nested_nr.i that has 2 procedures, 72 locations, 1 initial locations, 2 loop locations, and 37 error locations. [2025-03-17 14:17:14,294 INFO L491 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2025-03-17 14:17:14,332 INFO L143 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2025-03-17 14:17:14,358 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 75 places, 73 transitions, 150 flow [2025-03-17 14:17:14,383 INFO L124 PetriNetUnfolderBase]: 2/72 cut-off events. [2025-03-17 14:17:14,384 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2025-03-17 14:17:14,385 INFO L83 FinitePrefix]: Finished finitePrefix Result has 76 conditions, 72 events. 2/72 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 276 event pairs, 0 based on Foata normal form. 0/33 useless extension candidates. Maximal degree in co-relation 32. Up to 2 conditions per place. [2025-03-17 14:17:14,385 INFO L82 GeneralOperation]: Start removeDead. Operand has 75 places, 73 transitions, 150 flow [2025-03-17 14:17:14,388 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 74 places, 72 transitions, 147 flow [2025-03-17 14:17:14,393 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2025-03-17 14:17:14,401 INFO L333 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=None, 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;@3215a2b5, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2025-03-17 14:17:14,401 INFO L334 AbstractCegarLoop]: Starting to check reachability of 50 error locations. [2025-03-17 14:17:14,405 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2025-03-17 14:17:14,405 INFO L124 PetriNetUnfolderBase]: 1/7 cut-off events. [2025-03-17 14:17:14,405 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2025-03-17 14:17:14,406 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 14:17:14,406 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2025-03-17 14:17:14,406 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr23REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr23REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr24REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr21REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 47 more)] === [2025-03-17 14:17:14,409 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 14:17:14,409 INFO L85 PathProgramCache]: Analyzing trace with hash 15813510, now seen corresponding path program 1 times [2025-03-17 14:17:14,414 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 14:17:14,415 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2048793245] [2025-03-17 14:17:14,415 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 14:17:14,416 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 14:17:14,477 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 4 statements into 1 equivalence classes. [2025-03-17 14:17:14,504 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 4 of 4 statements. [2025-03-17 14:17:14,504 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 14:17:14,505 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:17:14,613 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 14:17:14,614 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 14:17:14,614 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2048793245] [2025-03-17 14:17:14,614 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2048793245] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-17 14:17:14,614 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-17 14:17:14,616 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2025-03-17 14:17:14,617 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [428861373] [2025-03-17 14:17:14,617 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-17 14:17:14,621 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2025-03-17 14:17:14,624 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 14:17:14,636 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2025-03-17 14:17:14,637 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-03-17 14:17:14,638 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 45 out of 73 [2025-03-17 14:17:14,642 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 72 transitions, 147 flow. Second operand has 3 states, 3 states have (on average 46.0) internal successors, (138), 3 states have internal predecessors, (138), 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) [2025-03-17 14:17:14,642 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 14:17:14,642 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 45 of 73 [2025-03-17 14:17:14,643 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 14:17:14,767 INFO L124 PetriNetUnfolderBase]: 65/268 cut-off events. [2025-03-17 14:17:14,767 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2025-03-17 14:17:14,768 INFO L83 FinitePrefix]: Finished finitePrefix Result has 428 conditions, 268 events. 65/268 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 1374 event pairs, 63 based on Foata normal form. 0/204 useless extension candidates. Maximal degree in co-relation 376. Up to 155 conditions per place. [2025-03-17 14:17:14,770 INFO L140 encePairwiseOnDemand]: 70/73 looper letters, 27 selfloop transitions, 2 changer transitions 0/73 dead transitions. [2025-03-17 14:17:14,771 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 73 transitions, 207 flow [2025-03-17 14:17:14,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-03-17 14:17:14,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2025-03-17 14:17:14,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 165 transitions. [2025-03-17 14:17:14,781 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.7534246575342466 [2025-03-17 14:17:14,782 INFO L175 Difference]: Start difference. First operand has 74 places, 72 transitions, 147 flow. Second operand 3 states and 165 transitions. [2025-03-17 14:17:14,782 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 73 transitions, 207 flow [2025-03-17 14:17:14,786 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 73 transitions, 206 flow, removed 0 selfloop flow, removed 1 redundant places. [2025-03-17 14:17:14,788 INFO L231 Difference]: Finished difference. Result has 76 places, 73 transitions, 158 flow [2025-03-17 14:17:14,791 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=73, PETRI_DIFFERENCE_MINUEND_FLOW=146, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=72, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=158, PETRI_PLACES=76, PETRI_TRANSITIONS=73} [2025-03-17 14:17:14,795 INFO L279 CegarLoopForPetriNet]: 74 programPoint places, 2 predicate places. [2025-03-17 14:17:14,796 INFO L471 AbstractCegarLoop]: Abstraction has has 76 places, 73 transitions, 158 flow [2025-03-17 14:17:14,796 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 46.0) internal successors, (138), 3 states have internal predecessors, (138), 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) [2025-03-17 14:17:14,796 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 14:17:14,796 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2025-03-17 14:17:14,796 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2025-03-17 14:17:14,796 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr23REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr23REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr24REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr21REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 47 more)] === [2025-03-17 14:17:14,797 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 14:17:14,797 INFO L85 PathProgramCache]: Analyzing trace with hash 490205394, now seen corresponding path program 1 times [2025-03-17 14:17:14,797 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 14:17:14,797 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [101467878] [2025-03-17 14:17:14,797 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 14:17:14,797 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 14:17:14,810 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 5 statements into 1 equivalence classes. [2025-03-17 14:17:14,817 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 5 of 5 statements. [2025-03-17 14:17:14,818 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 14:17:14,818 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:17:14,887 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 14:17:14,887 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 14:17:14,887 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [101467878] [2025-03-17 14:17:14,887 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [101467878] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-17 14:17:14,887 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [66816200] [2025-03-17 14:17:14,888 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 14:17:14,888 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 14:17:14,888 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-17 14:17:14,890 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) [2025-03-17 14:17:14,891 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2025-03-17 14:17:14,951 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 5 statements into 1 equivalence classes. [2025-03-17 14:17:14,978 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 5 of 5 statements. [2025-03-17 14:17:14,978 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 14:17:14,978 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:17:14,979 INFO L256 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 3 conjuncts are in the unsatisfiable core [2025-03-17 14:17:14,981 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-17 14:17:15,000 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 14:17:15,000 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-17 14:17:15,012 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 14:17:15,012 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [66816200] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-17 14:17:15,013 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-17 14:17:15,013 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2025-03-17 14:17:15,013 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1214977500] [2025-03-17 14:17:15,013 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-17 14:17:15,014 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2025-03-17 14:17:15,014 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 14:17:15,014 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2025-03-17 14:17:15,014 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2025-03-17 14:17:15,015 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 45 out of 73 [2025-03-17 14:17:15,015 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 73 transitions, 158 flow. Second operand has 7 states, 7 states have (on average 46.285714285714285) internal successors, (324), 7 states have internal predecessors, (324), 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) [2025-03-17 14:17:15,015 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 14:17:15,015 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 45 of 73 [2025-03-17 14:17:15,015 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 14:17:15,108 INFO L124 PetriNetUnfolderBase]: 65/271 cut-off events. [2025-03-17 14:17:15,109 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2025-03-17 14:17:15,109 INFO L83 FinitePrefix]: Finished finitePrefix Result has 443 conditions, 271 events. 65/271 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 1374 event pairs, 63 based on Foata normal form. 0/207 useless extension candidates. Maximal degree in co-relation 432. Up to 155 conditions per place. [2025-03-17 14:17:15,112 INFO L140 encePairwiseOnDemand]: 70/73 looper letters, 27 selfloop transitions, 5 changer transitions 0/76 dead transitions. [2025-03-17 14:17:15,112 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 81 places, 76 transitions, 234 flow [2025-03-17 14:17:15,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2025-03-17 14:17:15,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2025-03-17 14:17:15,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 305 transitions. [2025-03-17 14:17:15,114 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6963470319634704 [2025-03-17 14:17:15,116 INFO L175 Difference]: Start difference. First operand has 76 places, 73 transitions, 158 flow. Second operand 6 states and 305 transitions. [2025-03-17 14:17:15,116 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 81 places, 76 transitions, 234 flow [2025-03-17 14:17:15,116 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 76 transitions, 230 flow, removed 1 selfloop flow, removed 1 redundant places. [2025-03-17 14:17:15,117 INFO L231 Difference]: Finished difference. Result has 83 places, 76 transitions, 190 flow [2025-03-17 14:17:15,117 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=73, PETRI_DIFFERENCE_MINUEND_FLOW=154, PETRI_DIFFERENCE_MINUEND_PLACES=75, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=73, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=190, PETRI_PLACES=83, PETRI_TRANSITIONS=76} [2025-03-17 14:17:15,118 INFO L279 CegarLoopForPetriNet]: 74 programPoint places, 9 predicate places. [2025-03-17 14:17:15,118 INFO L471 AbstractCegarLoop]: Abstraction has has 83 places, 76 transitions, 190 flow [2025-03-17 14:17:15,118 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 46.285714285714285) internal successors, (324), 7 states have internal predecessors, (324), 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) [2025-03-17 14:17:15,118 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 14:17:15,118 INFO L206 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1, 1] [2025-03-17 14:17:15,125 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2025-03-17 14:17:15,319 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 14:17:15,319 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr23REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr23REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr24REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr21REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 47 more)] === [2025-03-17 14:17:15,319 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 14:17:15,319 INFO L85 PathProgramCache]: Analyzing trace with hash 806764166, now seen corresponding path program 2 times [2025-03-17 14:17:15,319 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 14:17:15,320 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1530499080] [2025-03-17 14:17:15,320 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-17 14:17:15,320 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 14:17:15,332 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 8 statements into 2 equivalence classes. [2025-03-17 14:17:15,345 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) and asserted 4 of 8 statements. [2025-03-17 14:17:15,347 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2025-03-17 14:17:15,347 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:17:15,411 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2025-03-17 14:17:15,411 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 14:17:15,411 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1530499080] [2025-03-17 14:17:15,412 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1530499080] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-17 14:17:15,412 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-17 14:17:15,412 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2025-03-17 14:17:15,412 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [80887477] [2025-03-17 14:17:15,412 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-17 14:17:15,412 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2025-03-17 14:17:15,412 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 14:17:15,413 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2025-03-17 14:17:15,413 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-03-17 14:17:15,469 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 39 out of 73 [2025-03-17 14:17:15,470 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 83 places, 76 transitions, 190 flow. Second operand has 3 states, 3 states have (on average 40.666666666666664) internal successors, (122), 3 states have internal predecessors, (122), 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) [2025-03-17 14:17:15,470 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 14:17:15,470 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 39 of 73 [2025-03-17 14:17:15,470 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 14:17:15,555 INFO L124 PetriNetUnfolderBase]: 65/267 cut-off events. [2025-03-17 14:17:15,556 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2025-03-17 14:17:15,556 INFO L83 FinitePrefix]: Finished finitePrefix Result has 454 conditions, 267 events. 65/267 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 1322 event pairs, 63 based on Foata normal form. 0/210 useless extension candidates. Maximal degree in co-relation 421. Up to 157 conditions per place. [2025-03-17 14:17:15,557 INFO L140 encePairwiseOnDemand]: 65/73 looper letters, 30 selfloop transitions, 4 changer transitions 0/72 dead transitions. [2025-03-17 14:17:15,557 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 81 places, 72 transitions, 250 flow [2025-03-17 14:17:15,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-03-17 14:17:15,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2025-03-17 14:17:15,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 151 transitions. [2025-03-17 14:17:15,558 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6894977168949772 [2025-03-17 14:17:15,558 INFO L175 Difference]: Start difference. First operand has 83 places, 76 transitions, 190 flow. Second operand 3 states and 151 transitions. [2025-03-17 14:17:15,558 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 81 places, 72 transitions, 250 flow [2025-03-17 14:17:15,559 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 72 transitions, 236 flow, removed 6 selfloop flow, removed 1 redundant places. [2025-03-17 14:17:15,560 INFO L231 Difference]: Finished difference. Result has 80 places, 72 transitions, 176 flow [2025-03-17 14:17:15,560 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=73, PETRI_DIFFERENCE_MINUEND_FLOW=168, PETRI_DIFFERENCE_MINUEND_PLACES=78, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=72, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=176, PETRI_PLACES=80, PETRI_TRANSITIONS=72} [2025-03-17 14:17:15,561 INFO L279 CegarLoopForPetriNet]: 74 programPoint places, 6 predicate places. [2025-03-17 14:17:15,561 INFO L471 AbstractCegarLoop]: Abstraction has has 80 places, 72 transitions, 176 flow [2025-03-17 14:17:15,561 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 40.666666666666664) internal successors, (122), 3 states have internal predecessors, (122), 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) [2025-03-17 14:17:15,561 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 14:17:15,561 INFO L206 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1, 1] [2025-03-17 14:17:15,561 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2025-03-17 14:17:15,561 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr24REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr23REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr24REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr21REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 47 more)] === [2025-03-17 14:17:15,562 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 14:17:15,562 INFO L85 PathProgramCache]: Analyzing trace with hash 806764167, now seen corresponding path program 1 times [2025-03-17 14:17:15,562 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 14:17:15,562 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [40271919] [2025-03-17 14:17:15,562 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 14:17:15,562 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 14:17:15,570 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 8 statements into 1 equivalence classes. [2025-03-17 14:17:15,576 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 8 of 8 statements. [2025-03-17 14:17:15,576 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 14:17:15,576 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:17:15,654 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 14:17:15,654 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 14:17:15,654 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [40271919] [2025-03-17 14:17:15,654 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [40271919] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-17 14:17:15,654 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1508842205] [2025-03-17 14:17:15,654 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 14:17:15,654 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 14:17:15,655 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-17 14:17:15,656 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) [2025-03-17 14:17:15,658 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2025-03-17 14:17:15,706 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 8 statements into 1 equivalence classes. [2025-03-17 14:17:15,727 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 8 of 8 statements. [2025-03-17 14:17:15,727 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 14:17:15,727 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:17:15,729 INFO L256 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 6 conjuncts are in the unsatisfiable core [2025-03-17 14:17:15,729 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-17 14:17:15,741 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 14:17:15,741 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-17 14:17:15,788 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 14:17:15,788 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1508842205] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-17 14:17:15,788 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-17 14:17:15,788 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2025-03-17 14:17:15,789 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [484681540] [2025-03-17 14:17:15,789 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-17 14:17:15,789 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2025-03-17 14:17:15,789 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 14:17:15,790 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2025-03-17 14:17:15,790 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2025-03-17 14:17:15,791 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 45 out of 73 [2025-03-17 14:17:15,792 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 80 places, 72 transitions, 176 flow. Second operand has 13 states, 13 states have (on average 46.15384615384615) internal successors, (600), 13 states have internal predecessors, (600), 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) [2025-03-17 14:17:15,792 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 14:17:15,792 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 45 of 73 [2025-03-17 14:17:15,792 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 14:17:15,894 INFO L124 PetriNetUnfolderBase]: 65/273 cut-off events. [2025-03-17 14:17:15,894 INFO L125 PetriNetUnfolderBase]: For 27/27 co-relation queries the response was YES. [2025-03-17 14:17:15,895 INFO L83 FinitePrefix]: Finished finitePrefix Result has 474 conditions, 273 events. 65/273 cut-off events. For 27/27 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 1325 event pairs, 63 based on Foata normal form. 6/221 useless extension candidates. Maximal degree in co-relation 431. Up to 155 conditions per place. [2025-03-17 14:17:15,896 INFO L140 encePairwiseOnDemand]: 70/73 looper letters, 27 selfloop transitions, 11 changer transitions 0/78 dead transitions. [2025-03-17 14:17:15,896 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 91 places, 78 transitions, 288 flow [2025-03-17 14:17:15,897 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2025-03-17 14:17:15,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2025-03-17 14:17:15,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 584 transitions. [2025-03-17 14:17:15,898 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6666666666666666 [2025-03-17 14:17:15,898 INFO L175 Difference]: Start difference. First operand has 80 places, 72 transitions, 176 flow. Second operand 12 states and 584 transitions. [2025-03-17 14:17:15,898 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 91 places, 78 transitions, 288 flow [2025-03-17 14:17:15,899 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 89 places, 78 transitions, 280 flow, removed 0 selfloop flow, removed 2 redundant places. [2025-03-17 14:17:15,900 INFO L231 Difference]: Finished difference. Result has 95 places, 78 transitions, 252 flow [2025-03-17 14:17:15,900 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=73, PETRI_DIFFERENCE_MINUEND_FLOW=168, PETRI_DIFFERENCE_MINUEND_PLACES=78, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=72, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=252, PETRI_PLACES=95, PETRI_TRANSITIONS=78} [2025-03-17 14:17:15,901 INFO L279 CegarLoopForPetriNet]: 74 programPoint places, 21 predicate places. [2025-03-17 14:17:15,901 INFO L471 AbstractCegarLoop]: Abstraction has has 95 places, 78 transitions, 252 flow [2025-03-17 14:17:15,901 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 46.15384615384615) internal successors, (600), 13 states have internal predecessors, (600), 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) [2025-03-17 14:17:15,901 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 14:17:15,902 INFO L206 CegarLoopForPetriNet]: trace histogram [10, 1, 1, 1, 1] [2025-03-17 14:17:15,908 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2025-03-17 14:17:16,106 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2025-03-17 14:17:16,106 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr24REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr23REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr24REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr21REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 47 more)] === [2025-03-17 14:17:16,106 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 14:17:16,106 INFO L85 PathProgramCache]: Analyzing trace with hash 1373428487, now seen corresponding path program 2 times [2025-03-17 14:17:16,106 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 14:17:16,107 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [265105547] [2025-03-17 14:17:16,107 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-17 14:17:16,107 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 14:17:16,127 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 14 statements into 2 equivalence classes. [2025-03-17 14:17:16,130 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) and asserted 4 of 14 statements. [2025-03-17 14:17:16,131 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2025-03-17 14:17:16,131 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:17:16,196 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2025-03-17 14:17:16,196 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 14:17:16,197 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [265105547] [2025-03-17 14:17:16,197 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [265105547] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-17 14:17:16,197 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-17 14:17:16,197 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2025-03-17 14:17:16,197 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1704416813] [2025-03-17 14:17:16,197 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-17 14:17:16,197 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2025-03-17 14:17:16,197 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 14:17:16,197 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2025-03-17 14:17:16,197 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-03-17 14:17:16,242 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 41 out of 73 [2025-03-17 14:17:16,243 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 95 places, 78 transitions, 252 flow. Second operand has 3 states, 3 states have (on average 42.666666666666664) internal successors, (128), 3 states have internal predecessors, (128), 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) [2025-03-17 14:17:16,243 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 14:17:16,243 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 41 of 73 [2025-03-17 14:17:16,243 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 14:17:16,314 INFO L124 PetriNetUnfolderBase]: 65/269 cut-off events. [2025-03-17 14:17:16,314 INFO L125 PetriNetUnfolderBase]: For 31/31 co-relation queries the response was YES. [2025-03-17 14:17:16,316 INFO L83 FinitePrefix]: Finished finitePrefix Result has 496 conditions, 269 events. 65/269 cut-off events. For 31/31 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 1297 event pairs, 63 based on Foata normal form. 2/214 useless extension candidates. Maximal degree in co-relation 421. Up to 163 conditions per place. [2025-03-17 14:17:16,317 INFO L140 encePairwiseOnDemand]: 65/73 looper letters, 34 selfloop transitions, 4 changer transitions 0/74 dead transitions. [2025-03-17 14:17:16,317 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 93 places, 74 transitions, 320 flow [2025-03-17 14:17:16,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-03-17 14:17:16,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2025-03-17 14:17:16,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 155 transitions. [2025-03-17 14:17:16,318 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.7077625570776256 [2025-03-17 14:17:16,318 INFO L175 Difference]: Start difference. First operand has 95 places, 78 transitions, 252 flow. Second operand 3 states and 155 transitions. [2025-03-17 14:17:16,318 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 93 places, 74 transitions, 320 flow [2025-03-17 14:17:16,320 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 88 places, 74 transitions, 272 flow, removed 19 selfloop flow, removed 5 redundant places. [2025-03-17 14:17:16,321 INFO L231 Difference]: Finished difference. Result has 88 places, 74 transitions, 204 flow [2025-03-17 14:17:16,321 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=73, PETRI_DIFFERENCE_MINUEND_FLOW=196, PETRI_DIFFERENCE_MINUEND_PLACES=86, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=74, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=204, PETRI_PLACES=88, PETRI_TRANSITIONS=74} [2025-03-17 14:17:16,325 INFO L279 CegarLoopForPetriNet]: 74 programPoint places, 14 predicate places. [2025-03-17 14:17:16,325 INFO L471 AbstractCegarLoop]: Abstraction has has 88 places, 74 transitions, 204 flow [2025-03-17 14:17:16,325 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 42.666666666666664) internal successors, (128), 3 states have internal predecessors, (128), 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) [2025-03-17 14:17:16,325 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 14:17:16,326 INFO L206 CegarLoopForPetriNet]: trace histogram [10, 1, 1, 1, 1, 1, 1] [2025-03-17 14:17:16,326 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2025-03-17 14:17:16,326 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr19REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr23REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr24REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr21REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 47 more)] === [2025-03-17 14:17:16,327 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 14:17:16,327 INFO L85 PathProgramCache]: Analyzing trace with hash 1309829981, now seen corresponding path program 1 times [2025-03-17 14:17:16,327 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 14:17:16,327 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1976244313] [2025-03-17 14:17:16,327 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 14:17:16,327 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 14:17:16,336 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 16 statements into 1 equivalence classes. [2025-03-17 14:17:16,350 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 16 of 16 statements. [2025-03-17 14:17:16,350 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 14:17:16,351 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:17:16,500 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2025-03-17 14:17:16,501 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 14:17:16,501 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1976244313] [2025-03-17 14:17:16,501 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1976244313] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-17 14:17:16,501 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-17 14:17:16,501 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2025-03-17 14:17:16,501 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1705435218] [2025-03-17 14:17:16,501 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-17 14:17:16,501 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2025-03-17 14:17:16,501 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 14:17:16,502 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2025-03-17 14:17:16,502 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2025-03-17 14:17:16,645 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 38 out of 73 [2025-03-17 14:17:16,645 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 88 places, 74 transitions, 204 flow. Second operand has 6 states, 6 states have (on average 39.166666666666664) internal successors, (235), 6 states have internal predecessors, (235), 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) [2025-03-17 14:17:16,645 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 14:17:16,645 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 38 of 73 [2025-03-17 14:17:16,645 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 14:17:16,716 INFO L124 PetriNetUnfolderBase]: 74/291 cut-off events. [2025-03-17 14:17:16,716 INFO L125 PetriNetUnfolderBase]: For 46/46 co-relation queries the response was YES. [2025-03-17 14:17:16,717 INFO L83 FinitePrefix]: Finished finitePrefix Result has 519 conditions, 291 events. 74/291 cut-off events. For 46/46 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 1432 event pairs, 72 based on Foata normal form. 1/240 useless extension candidates. Maximal degree in co-relation 474. Up to 185 conditions per place. [2025-03-17 14:17:16,719 INFO L140 encePairwiseOnDemand]: 68/73 looper letters, 40 selfloop transitions, 1 changer transitions 0/70 dead transitions. [2025-03-17 14:17:16,719 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 86 places, 70 transitions, 278 flow [2025-03-17 14:17:16,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-03-17 14:17:16,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2025-03-17 14:17:16,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 149 transitions. [2025-03-17 14:17:16,720 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.680365296803653 [2025-03-17 14:17:16,720 INFO L175 Difference]: Start difference. First operand has 88 places, 74 transitions, 204 flow. Second operand 3 states and 149 transitions. [2025-03-17 14:17:16,720 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 86 places, 70 transitions, 278 flow [2025-03-17 14:17:16,722 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 84 places, 70 transitions, 270 flow, removed 0 selfloop flow, removed 2 redundant places. [2025-03-17 14:17:16,724 INFO L231 Difference]: Finished difference. Result has 84 places, 70 transitions, 190 flow [2025-03-17 14:17:16,726 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=73, PETRI_DIFFERENCE_MINUEND_FLOW=188, PETRI_DIFFERENCE_MINUEND_PLACES=82, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=70, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=190, PETRI_PLACES=84, PETRI_TRANSITIONS=70} [2025-03-17 14:17:16,727 INFO L279 CegarLoopForPetriNet]: 74 programPoint places, 10 predicate places. [2025-03-17 14:17:16,727 INFO L471 AbstractCegarLoop]: Abstraction has has 84 places, 70 transitions, 190 flow [2025-03-17 14:17:16,727 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 39.166666666666664) internal successors, (235), 6 states have internal predecessors, (235), 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) [2025-03-17 14:17:16,727 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 14:17:16,727 INFO L206 CegarLoopForPetriNet]: trace histogram [10, 1, 1, 1, 1, 1, 1] [2025-03-17 14:17:16,727 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2025-03-17 14:17:16,727 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr20REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr23REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr24REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr21REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 47 more)] === [2025-03-17 14:17:16,727 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 14:17:16,727 INFO L85 PathProgramCache]: Analyzing trace with hash 1309829982, now seen corresponding path program 1 times [2025-03-17 14:17:16,727 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 14:17:16,728 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [768912624] [2025-03-17 14:17:16,728 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 14:17:16,728 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 14:17:16,737 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 16 statements into 1 equivalence classes. [2025-03-17 14:17:16,751 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 16 of 16 statements. [2025-03-17 14:17:16,752 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 14:17:16,752 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:17:16,958 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2025-03-17 14:17:16,958 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 14:17:16,958 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [768912624] [2025-03-17 14:17:16,958 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [768912624] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-17 14:17:16,958 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-17 14:17:16,958 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2025-03-17 14:17:16,959 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1173316633] [2025-03-17 14:17:16,959 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-17 14:17:16,959 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2025-03-17 14:17:16,959 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 14:17:16,960 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2025-03-17 14:17:16,960 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2025-03-17 14:17:17,174 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 35 out of 73 [2025-03-17 14:17:17,175 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 84 places, 70 transitions, 190 flow. Second operand has 6 states, 6 states have (on average 36.0) internal successors, (216), 6 states have internal predecessors, (216), 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) [2025-03-17 14:17:17,175 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 14:17:17,175 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 35 of 73 [2025-03-17 14:17:17,175 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 14:17:17,269 INFO L124 PetriNetUnfolderBase]: 65/277 cut-off events. [2025-03-17 14:17:17,270 INFO L125 PetriNetUnfolderBase]: For 46/46 co-relation queries the response was YES. [2025-03-17 14:17:17,272 INFO L83 FinitePrefix]: Finished finitePrefix Result has 490 conditions, 277 events. 65/277 cut-off events. For 46/46 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 1235 event pairs, 63 based on Foata normal form. 0/222 useless extension candidates. Maximal degree in co-relation 472. Up to 166 conditions per place. [2025-03-17 14:17:17,273 INFO L140 encePairwiseOnDemand]: 63/73 looper letters, 40 selfloop transitions, 7 changer transitions 0/77 dead transitions. [2025-03-17 14:17:17,273 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 88 places, 77 transitions, 298 flow [2025-03-17 14:17:17,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-03-17 14:17:17,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2025-03-17 14:17:17,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 215 transitions. [2025-03-17 14:17:17,274 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.589041095890411 [2025-03-17 14:17:17,274 INFO L175 Difference]: Start difference. First operand has 84 places, 70 transitions, 190 flow. Second operand 5 states and 215 transitions. [2025-03-17 14:17:17,274 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 88 places, 77 transitions, 298 flow [2025-03-17 14:17:17,275 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 87 places, 77 transitions, 297 flow, removed 0 selfloop flow, removed 1 redundant places. [2025-03-17 14:17:17,276 INFO L231 Difference]: Finished difference. Result has 89 places, 75 transitions, 239 flow [2025-03-17 14:17:17,276 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=73, PETRI_DIFFERENCE_MINUEND_FLOW=189, PETRI_DIFFERENCE_MINUEND_PLACES=83, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=70, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=239, PETRI_PLACES=89, PETRI_TRANSITIONS=75} [2025-03-17 14:17:17,276 INFO L279 CegarLoopForPetriNet]: 74 programPoint places, 15 predicate places. [2025-03-17 14:17:17,276 INFO L471 AbstractCegarLoop]: Abstraction has has 89 places, 75 transitions, 239 flow [2025-03-17 14:17:17,278 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 36.0) internal successors, (216), 6 states have internal predecessors, (216), 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) [2025-03-17 14:17:17,278 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 14:17:17,278 INFO L206 CegarLoopForPetriNet]: trace histogram [10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 14:17:17,279 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2025-03-17 14:17:17,279 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr23REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr24REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr21REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 47 more)] === [2025-03-17 14:17:17,279 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 14:17:17,279 INFO L85 PathProgramCache]: Analyzing trace with hash -554478939, now seen corresponding path program 1 times [2025-03-17 14:17:17,281 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 14:17:17,281 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1177829192] [2025-03-17 14:17:17,281 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 14:17:17,281 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 14:17:17,292 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 20 statements into 1 equivalence classes. [2025-03-17 14:17:17,303 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 20 of 20 statements. [2025-03-17 14:17:17,305 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 14:17:17,305 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:17:17,542 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2025-03-17 14:17:17,542 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 14:17:17,542 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1177829192] [2025-03-17 14:17:17,542 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1177829192] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-17 14:17:17,542 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-17 14:17:17,542 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2025-03-17 14:17:17,542 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1074254300] [2025-03-17 14:17:17,542 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-17 14:17:17,543 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2025-03-17 14:17:17,543 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 14:17:17,543 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2025-03-17 14:17:17,543 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2025-03-17 14:17:17,715 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 36 out of 73 [2025-03-17 14:17:17,715 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 89 places, 75 transitions, 239 flow. Second operand has 7 states, 7 states have (on average 37.57142857142857) internal successors, (263), 7 states have internal predecessors, (263), 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) [2025-03-17 14:17:17,715 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 14:17:17,715 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 36 of 73 [2025-03-17 14:17:17,715 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 14:17:17,860 INFO L124 PetriNetUnfolderBase]: 65/273 cut-off events. [2025-03-17 14:17:17,860 INFO L125 PetriNetUnfolderBase]: For 69/69 co-relation queries the response was YES. [2025-03-17 14:17:17,861 INFO L83 FinitePrefix]: Finished finitePrefix Result has 512 conditions, 273 events. 65/273 cut-off events. For 69/69 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 1205 event pairs, 63 based on Foata normal form. 0/226 useless extension candidates. Maximal degree in co-relation 491. Up to 160 conditions per place. [2025-03-17 14:17:17,862 INFO L140 encePairwiseOnDemand]: 65/73 looper letters, 35 selfloop transitions, 11 changer transitions 0/73 dead transitions. [2025-03-17 14:17:17,862 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 93 places, 73 transitions, 327 flow [2025-03-17 14:17:17,862 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2025-03-17 14:17:17,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2025-03-17 14:17:17,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 285 transitions. [2025-03-17 14:17:17,863 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5577299412915852 [2025-03-17 14:17:17,863 INFO L175 Difference]: Start difference. First operand has 89 places, 75 transitions, 239 flow. Second operand 7 states and 285 transitions. [2025-03-17 14:17:17,863 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 93 places, 73 transitions, 327 flow [2025-03-17 14:17:17,864 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 91 places, 73 transitions, 323 flow, removed 0 selfloop flow, removed 2 redundant places. [2025-03-17 14:17:17,865 INFO L231 Difference]: Finished difference. Result has 91 places, 73 transitions, 253 flow [2025-03-17 14:17:17,865 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=73, PETRI_DIFFERENCE_MINUEND_FLOW=231, PETRI_DIFFERENCE_MINUEND_PLACES=85, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=73, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=253, PETRI_PLACES=91, PETRI_TRANSITIONS=73} [2025-03-17 14:17:17,865 INFO L279 CegarLoopForPetriNet]: 74 programPoint places, 17 predicate places. [2025-03-17 14:17:17,866 INFO L471 AbstractCegarLoop]: Abstraction has has 91 places, 73 transitions, 253 flow [2025-03-17 14:17:17,866 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 37.57142857142857) internal successors, (263), 7 states have internal predecessors, (263), 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) [2025-03-17 14:17:17,866 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 14:17:17,866 INFO L206 CegarLoopForPetriNet]: trace histogram [10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 14:17:17,866 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2025-03-17 14:17:17,866 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr12REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr23REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr24REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr21REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 47 more)] === [2025-03-17 14:17:17,866 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 14:17:17,866 INFO L85 PathProgramCache]: Analyzing trace with hash -554478938, now seen corresponding path program 1 times [2025-03-17 14:17:17,867 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 14:17:17,867 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1476377204] [2025-03-17 14:17:17,867 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 14:17:17,867 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 14:17:17,877 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 20 statements into 1 equivalence classes. [2025-03-17 14:17:17,887 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 20 of 20 statements. [2025-03-17 14:17:17,887 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 14:17:17,887 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:17:18,150 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2025-03-17 14:17:18,151 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 14:17:18,151 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1476377204] [2025-03-17 14:17:18,151 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1476377204] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-17 14:17:18,151 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-17 14:17:18,151 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2025-03-17 14:17:18,151 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1386090467] [2025-03-17 14:17:18,152 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-17 14:17:18,152 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2025-03-17 14:17:18,152 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 14:17:18,152 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2025-03-17 14:17:18,152 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2025-03-17 14:17:18,462 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 37 out of 73 [2025-03-17 14:17:18,462 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 91 places, 73 transitions, 253 flow. Second operand has 7 states, 7 states have (on average 38.57142857142857) internal successors, (270), 7 states have internal predecessors, (270), 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) [2025-03-17 14:17:18,462 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 14:17:18,463 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 37 of 73 [2025-03-17 14:17:18,463 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 14:17:18,590 INFO L124 PetriNetUnfolderBase]: 65/269 cut-off events. [2025-03-17 14:17:18,591 INFO L125 PetriNetUnfolderBase]: For 71/71 co-relation queries the response was YES. [2025-03-17 14:17:18,591 INFO L83 FinitePrefix]: Finished finitePrefix Result has 516 conditions, 269 events. 65/269 cut-off events. For 71/71 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 1189 event pairs, 63 based on Foata normal form. 2/225 useless extension candidates. Maximal degree in co-relation 496. Up to 160 conditions per place. [2025-03-17 14:17:18,593 INFO L140 encePairwiseOnDemand]: 65/73 looper letters, 34 selfloop transitions, 11 changer transitions 0/71 dead transitions. [2025-03-17 14:17:18,593 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 95 places, 71 transitions, 339 flow [2025-03-17 14:17:18,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2025-03-17 14:17:18,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2025-03-17 14:17:18,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 291 transitions. [2025-03-17 14:17:18,594 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5694716242661448 [2025-03-17 14:17:18,594 INFO L175 Difference]: Start difference. First operand has 91 places, 73 transitions, 253 flow. Second operand 7 states and 291 transitions. [2025-03-17 14:17:18,594 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 95 places, 71 transitions, 339 flow [2025-03-17 14:17:18,595 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 89 places, 71 transitions, 317 flow, removed 0 selfloop flow, removed 6 redundant places. [2025-03-17 14:17:18,596 INFO L231 Difference]: Finished difference. Result has 89 places, 71 transitions, 249 flow [2025-03-17 14:17:18,596 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=73, PETRI_DIFFERENCE_MINUEND_FLOW=227, PETRI_DIFFERENCE_MINUEND_PLACES=83, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=71, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=249, PETRI_PLACES=89, PETRI_TRANSITIONS=71} [2025-03-17 14:17:18,597 INFO L279 CegarLoopForPetriNet]: 74 programPoint places, 15 predicate places. [2025-03-17 14:17:18,597 INFO L471 AbstractCegarLoop]: Abstraction has has 89 places, 71 transitions, 249 flow [2025-03-17 14:17:18,597 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 38.57142857142857) internal successors, (270), 7 states have internal predecessors, (270), 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) [2025-03-17 14:17:18,597 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 14:17:18,597 INFO L206 CegarLoopForPetriNet]: trace histogram [10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 14:17:18,597 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2025-03-17 14:17:18,597 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr23REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr24REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr21REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 47 more)] === [2025-03-17 14:17:18,597 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 14:17:18,597 INFO L85 PathProgramCache]: Analyzing trace with hash -278297781, now seen corresponding path program 1 times [2025-03-17 14:17:18,597 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 14:17:18,598 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2001836270] [2025-03-17 14:17:18,598 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 14:17:18,599 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 14:17:18,611 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 22 statements into 1 equivalence classes. [2025-03-17 14:17:18,621 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 22 of 22 statements. [2025-03-17 14:17:18,621 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 14:17:18,622 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:17:18,761 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2025-03-17 14:17:18,761 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 14:17:18,762 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2001836270] [2025-03-17 14:17:18,762 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2001836270] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-17 14:17:18,762 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-17 14:17:18,762 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2025-03-17 14:17:18,762 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2039090892] [2025-03-17 14:17:18,762 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-17 14:17:18,762 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-03-17 14:17:18,762 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 14:17:18,763 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-03-17 14:17:18,763 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2025-03-17 14:17:18,848 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 40 out of 73 [2025-03-17 14:17:18,849 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 89 places, 71 transitions, 249 flow. Second operand has 5 states, 5 states have (on average 42.0) internal successors, (210), 5 states have internal predecessors, (210), 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) [2025-03-17 14:17:18,849 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 14:17:18,849 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 40 of 73 [2025-03-17 14:17:18,849 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 14:17:18,955 INFO L124 PetriNetUnfolderBase]: 65/267 cut-off events. [2025-03-17 14:17:18,955 INFO L125 PetriNetUnfolderBase]: For 81/81 co-relation queries the response was YES. [2025-03-17 14:17:18,955 INFO L83 FinitePrefix]: Finished finitePrefix Result has 510 conditions, 267 events. 65/267 cut-off events. For 81/81 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 1179 event pairs, 63 based on Foata normal form. 2/225 useless extension candidates. Maximal degree in co-relation 490. Up to 162 conditions per place. [2025-03-17 14:17:18,956 INFO L140 encePairwiseOnDemand]: 66/73 looper letters, 32 selfloop transitions, 11 changer transitions 0/70 dead transitions. [2025-03-17 14:17:18,956 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 92 places, 70 transitions, 333 flow [2025-03-17 14:17:18,956 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-03-17 14:17:18,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2025-03-17 14:17:18,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 229 transitions. [2025-03-17 14:17:18,957 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6273972602739726 [2025-03-17 14:17:18,957 INFO L175 Difference]: Start difference. First operand has 89 places, 71 transitions, 249 flow. Second operand 5 states and 229 transitions. [2025-03-17 14:17:18,957 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 92 places, 70 transitions, 333 flow [2025-03-17 14:17:18,958 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 86 places, 70 transitions, 311 flow, removed 0 selfloop flow, removed 6 redundant places. [2025-03-17 14:17:18,959 INFO L231 Difference]: Finished difference. Result has 86 places, 70 transitions, 247 flow [2025-03-17 14:17:18,959 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=73, PETRI_DIFFERENCE_MINUEND_FLOW=225, PETRI_DIFFERENCE_MINUEND_PLACES=82, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=70, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=247, PETRI_PLACES=86, PETRI_TRANSITIONS=70} [2025-03-17 14:17:18,959 INFO L279 CegarLoopForPetriNet]: 74 programPoint places, 12 predicate places. [2025-03-17 14:17:18,959 INFO L471 AbstractCegarLoop]: Abstraction has has 86 places, 70 transitions, 247 flow [2025-03-17 14:17:18,960 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 42.0) internal successors, (210), 5 states have internal predecessors, (210), 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) [2025-03-17 14:17:18,960 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 14:17:18,960 INFO L206 CegarLoopForPetriNet]: trace histogram [10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 14:17:18,960 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2025-03-17 14:17:18,960 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr23REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr24REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr21REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 47 more)] === [2025-03-17 14:17:18,960 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 14:17:18,960 INFO L85 PathProgramCache]: Analyzing trace with hash -278297782, now seen corresponding path program 1 times [2025-03-17 14:17:18,960 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 14:17:18,961 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1249946030] [2025-03-17 14:17:18,961 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 14:17:18,961 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 14:17:18,971 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 22 statements into 1 equivalence classes. [2025-03-17 14:17:18,978 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 22 of 22 statements. [2025-03-17 14:17:18,978 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 14:17:18,978 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:17:19,048 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2025-03-17 14:17:19,049 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 14:17:19,049 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1249946030] [2025-03-17 14:17:19,049 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1249946030] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-17 14:17:19,049 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-17 14:17:19,049 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2025-03-17 14:17:19,049 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1211603211] [2025-03-17 14:17:19,049 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-17 14:17:19,049 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-03-17 14:17:19,050 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 14:17:19,050 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-03-17 14:17:19,050 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2025-03-17 14:17:19,131 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 38 out of 73 [2025-03-17 14:17:19,133 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 70 transitions, 247 flow. Second operand has 5 states, 5 states have (on average 40.4) internal successors, (202), 5 states have internal predecessors, (202), 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) [2025-03-17 14:17:19,133 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 14:17:19,133 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 38 of 73 [2025-03-17 14:17:19,133 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 14:17:19,222 INFO L124 PetriNetUnfolderBase]: 65/265 cut-off events. [2025-03-17 14:17:19,222 INFO L125 PetriNetUnfolderBase]: For 71/71 co-relation queries the response was YES. [2025-03-17 14:17:19,223 INFO L83 FinitePrefix]: Finished finitePrefix Result has 512 conditions, 265 events. 65/265 cut-off events. For 71/71 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 1166 event pairs, 63 based on Foata normal form. 2/223 useless extension candidates. Maximal degree in co-relation 492. Up to 162 conditions per place. [2025-03-17 14:17:19,223 INFO L140 encePairwiseOnDemand]: 66/73 looper letters, 34 selfloop transitions, 11 changer transitions 0/69 dead transitions. [2025-03-17 14:17:19,223 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 89 places, 69 transitions, 335 flow [2025-03-17 14:17:19,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-03-17 14:17:19,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2025-03-17 14:17:19,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 221 transitions. [2025-03-17 14:17:19,226 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6054794520547945 [2025-03-17 14:17:19,226 INFO L175 Difference]: Start difference. First operand has 86 places, 70 transitions, 247 flow. Second operand 5 states and 221 transitions. [2025-03-17 14:17:19,226 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 89 places, 69 transitions, 335 flow [2025-03-17 14:17:19,227 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 85 places, 69 transitions, 313 flow, removed 0 selfloop flow, removed 4 redundant places. [2025-03-17 14:17:19,228 INFO L231 Difference]: Finished difference. Result has 85 places, 69 transitions, 245 flow [2025-03-17 14:17:19,228 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=73, PETRI_DIFFERENCE_MINUEND_FLOW=223, PETRI_DIFFERENCE_MINUEND_PLACES=81, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=245, PETRI_PLACES=85, PETRI_TRANSITIONS=69} [2025-03-17 14:17:19,228 INFO L279 CegarLoopForPetriNet]: 74 programPoint places, 11 predicate places. [2025-03-17 14:17:19,229 INFO L471 AbstractCegarLoop]: Abstraction has has 85 places, 69 transitions, 245 flow [2025-03-17 14:17:19,229 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 40.4) internal successors, (202), 5 states have internal predecessors, (202), 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) [2025-03-17 14:17:19,229 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 14:17:19,229 INFO L206 CegarLoopForPetriNet]: trace histogram [10, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 14:17:19,229 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2025-03-17 14:17:19,230 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr20REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr23REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr24REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr21REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 47 more)] === [2025-03-17 14:17:19,230 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 14:17:19,230 INFO L85 PathProgramCache]: Analyzing trace with hash 1307989234, now seen corresponding path program 1 times [2025-03-17 14:17:19,230 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 14:17:19,230 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1902114349] [2025-03-17 14:17:19,230 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 14:17:19,231 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 14:17:19,244 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 26 statements into 1 equivalence classes. [2025-03-17 14:17:19,257 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 26 of 26 statements. [2025-03-17 14:17:19,260 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 14:17:19,260 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:17:19,603 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2025-03-17 14:17:19,603 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 14:17:19,603 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1902114349] [2025-03-17 14:17:19,603 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1902114349] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-17 14:17:19,603 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [743213521] [2025-03-17 14:17:19,603 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 14:17:19,604 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 14:17:19,604 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-17 14:17:19,605 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) [2025-03-17 14:17:19,615 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2025-03-17 14:17:19,683 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 26 statements into 1 equivalence classes. [2025-03-17 14:17:19,724 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 26 of 26 statements. [2025-03-17 14:17:19,724 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 14:17:19,724 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:17:19,726 INFO L256 TraceCheckSpWp]: Trace formula consists of 485 conjuncts, 47 conjuncts are in the unsatisfiable core [2025-03-17 14:17:19,728 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-17 14:17:19,863 INFO L349 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2025-03-17 14:17:19,864 INFO L378 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 14 treesize of output 13 [2025-03-17 14:17:19,880 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2025-03-17 14:17:19,880 INFO L378 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 [2025-03-17 14:17:19,946 INFO L349 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2025-03-17 14:17:19,947 INFO L378 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 14 treesize of output 13 [2025-03-17 14:17:19,959 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2025-03-17 14:17:19,959 INFO L378 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 [2025-03-17 14:17:19,969 INFO L378 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 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2025-03-17 14:17:20,101 INFO L190 IndexEqualityManager]: detected not equals via solver [2025-03-17 14:17:20,101 INFO L378 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 14 treesize of output 9 [2025-03-17 14:17:20,129 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2025-03-17 14:17:20,129 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-17 14:17:20,287 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-03-17 14:17:20,288 INFO L378 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 43 treesize of output 61 [2025-03-17 14:17:20,385 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2025-03-17 14:17:20,385 INFO L378 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 13 treesize of output 12 [2025-03-17 14:17:20,616 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2025-03-17 14:17:20,617 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [743213521] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-17 14:17:20,617 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-17 14:17:20,617 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 5] total 21 [2025-03-17 14:17:20,617 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [954336230] [2025-03-17 14:17:20,617 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-17 14:17:20,618 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2025-03-17 14:17:20,618 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 14:17:20,618 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2025-03-17 14:17:20,618 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=405, Unknown=0, NotChecked=0, Total=506 [2025-03-17 14:17:23,036 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 34 out of 73 [2025-03-17 14:17:23,037 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 85 places, 69 transitions, 245 flow. Second operand has 23 states, 23 states have (on average 35.69565217391305) internal successors, (821), 23 states have internal predecessors, (821), 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) [2025-03-17 14:17:23,037 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 14:17:23,037 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 34 of 73 [2025-03-17 14:17:23,037 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 14:17:23,405 INFO L124 PetriNetUnfolderBase]: 75/305 cut-off events. [2025-03-17 14:17:23,405 INFO L125 PetriNetUnfolderBase]: For 90/90 co-relation queries the response was YES. [2025-03-17 14:17:23,405 INFO L83 FinitePrefix]: Finished finitePrefix Result has 588 conditions, 305 events. 75/305 cut-off events. For 90/90 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 1347 event pairs, 72 based on Foata normal form. 5/262 useless extension candidates. Maximal degree in co-relation 568. Up to 176 conditions per place. [2025-03-17 14:17:23,406 INFO L140 encePairwiseOnDemand]: 63/73 looper letters, 43 selfloop transitions, 12 changer transitions 0/78 dead transitions. [2025-03-17 14:17:23,406 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 93 places, 78 transitions, 399 flow [2025-03-17 14:17:23,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2025-03-17 14:17:23,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2025-03-17 14:17:23,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 424 transitions. [2025-03-17 14:17:23,408 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5280199252801993 [2025-03-17 14:17:23,408 INFO L175 Difference]: Start difference. First operand has 85 places, 69 transitions, 245 flow. Second operand 11 states and 424 transitions. [2025-03-17 14:17:23,408 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 93 places, 78 transitions, 399 flow [2025-03-17 14:17:23,409 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 89 places, 78 transitions, 361 flow, removed 0 selfloop flow, removed 4 redundant places. [2025-03-17 14:17:23,410 INFO L231 Difference]: Finished difference. Result has 90 places, 70 transitions, 256 flow [2025-03-17 14:17:23,410 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=73, PETRI_DIFFERENCE_MINUEND_FLOW=215, PETRI_DIFFERENCE_MINUEND_PLACES=79, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=67, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=256, PETRI_PLACES=90, PETRI_TRANSITIONS=70} [2025-03-17 14:17:23,411 INFO L279 CegarLoopForPetriNet]: 74 programPoint places, 16 predicate places. [2025-03-17 14:17:23,411 INFO L471 AbstractCegarLoop]: Abstraction has has 90 places, 70 transitions, 256 flow [2025-03-17 14:17:23,411 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 35.69565217391305) internal successors, (821), 23 states have internal predecessors, (821), 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) [2025-03-17 14:17:23,411 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 14:17:23,411 INFO L206 CegarLoopForPetriNet]: trace histogram [10, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 14:17:23,418 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2025-03-17 14:17:23,616 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 14:17:23,616 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr23REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr24REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr21REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 47 more)] === [2025-03-17 14:17:23,616 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 14:17:23,616 INFO L85 PathProgramCache]: Analyzing trace with hash 325237984, now seen corresponding path program 1 times [2025-03-17 14:17:23,616 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 14:17:23,616 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1243169824] [2025-03-17 14:17:23,616 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 14:17:23,616 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 14:17:23,643 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 38 statements into 1 equivalence classes. [2025-03-17 14:17:23,658 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 38 of 38 statements. [2025-03-17 14:17:23,658 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 14:17:23,658 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:17:23,744 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2025-03-17 14:17:23,745 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 14:17:23,745 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1243169824] [2025-03-17 14:17:23,745 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1243169824] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-17 14:17:23,745 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [747176432] [2025-03-17 14:17:23,745 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 14:17:23,745 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 14:17:23,745 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-17 14:17:23,747 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) [2025-03-17 14:17:23,750 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2025-03-17 14:17:23,837 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 38 statements into 1 equivalence classes. [2025-03-17 14:17:23,890 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 38 of 38 statements. [2025-03-17 14:17:23,890 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 14:17:23,890 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:17:23,892 INFO L256 TraceCheckSpWp]: Trace formula consists of 648 conjuncts, 4 conjuncts are in the unsatisfiable core [2025-03-17 14:17:23,894 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-17 14:17:23,919 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2025-03-17 14:17:23,920 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-17 14:17:23,955 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2025-03-17 14:17:23,956 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [747176432] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-17 14:17:23,956 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-17 14:17:23,956 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 9 [2025-03-17 14:17:23,956 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [60118226] [2025-03-17 14:17:23,956 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-17 14:17:23,956 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2025-03-17 14:17:23,956 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 14:17:23,958 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2025-03-17 14:17:23,958 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2025-03-17 14:17:23,970 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 45 out of 73 [2025-03-17 14:17:23,970 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 90 places, 70 transitions, 256 flow. Second operand has 9 states, 9 states have (on average 50.0) internal successors, (450), 9 states have internal predecessors, (450), 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) [2025-03-17 14:17:23,970 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 14:17:23,970 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 45 of 73 [2025-03-17 14:17:23,970 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 14:17:24,095 INFO L124 PetriNetUnfolderBase]: 65/304 cut-off events. [2025-03-17 14:17:24,095 INFO L125 PetriNetUnfolderBase]: For 119/119 co-relation queries the response was YES. [2025-03-17 14:17:24,096 INFO L83 FinitePrefix]: Finished finitePrefix Result has 608 conditions, 304 events. 65/304 cut-off events. For 119/119 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 1106 event pairs, 63 based on Foata normal form. 1/260 useless extension candidates. Maximal degree in co-relation 586. Up to 158 conditions per place. [2025-03-17 14:17:24,097 INFO L140 encePairwiseOnDemand]: 69/73 looper letters, 66 selfloop transitions, 8 changer transitions 0/98 dead transitions. [2025-03-17 14:17:24,097 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 97 places, 98 transitions, 514 flow [2025-03-17 14:17:24,097 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2025-03-17 14:17:24,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2025-03-17 14:17:24,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 428 transitions. [2025-03-17 14:17:24,098 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.7328767123287672 [2025-03-17 14:17:24,098 INFO L175 Difference]: Start difference. First operand has 90 places, 70 transitions, 256 flow. Second operand 8 states and 428 transitions. [2025-03-17 14:17:24,098 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 97 places, 98 transitions, 514 flow [2025-03-17 14:17:24,099 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 93 places, 98 transitions, 490 flow, removed 5 selfloop flow, removed 4 redundant places. [2025-03-17 14:17:24,100 INFO L231 Difference]: Finished difference. Result has 97 places, 73 transitions, 292 flow [2025-03-17 14:17:24,101 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=73, PETRI_DIFFERENCE_MINUEND_FLOW=232, PETRI_DIFFERENCE_MINUEND_PLACES=86, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=292, PETRI_PLACES=97, PETRI_TRANSITIONS=73} [2025-03-17 14:17:24,102 INFO L279 CegarLoopForPetriNet]: 74 programPoint places, 23 predicate places. [2025-03-17 14:17:24,102 INFO L471 AbstractCegarLoop]: Abstraction has has 97 places, 73 transitions, 292 flow [2025-03-17 14:17:24,102 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 50.0) internal successors, (450), 9 states have internal predecessors, (450), 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) [2025-03-17 14:17:24,103 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 14:17:24,103 INFO L206 CegarLoopForPetriNet]: trace histogram [10, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 14:17:24,109 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2025-03-17 14:17:24,303 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 14:17:24,304 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr23REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr24REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr21REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 47 more)] === [2025-03-17 14:17:24,304 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 14:17:24,304 INFO L85 PathProgramCache]: Analyzing trace with hash 277598512, now seen corresponding path program 2 times [2025-03-17 14:17:24,304 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 14:17:24,304 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [307198766] [2025-03-17 14:17:24,304 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-17 14:17:24,304 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 14:17:24,346 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 78 statements into 2 equivalence classes. [2025-03-17 14:17:24,387 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 78 of 78 statements. [2025-03-17 14:17:24,387 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-17 14:17:24,388 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:17:24,624 INFO L134 CoverageAnalysis]: Checked inductivity of 211 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2025-03-17 14:17:24,624 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 14:17:24,624 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [307198766] [2025-03-17 14:17:24,624 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [307198766] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-17 14:17:24,624 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [20682274] [2025-03-17 14:17:24,625 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-17 14:17:24,625 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 14:17:24,625 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-17 14:17:24,626 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) [2025-03-17 14:17:24,628 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2025-03-17 14:17:24,775 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 78 statements into 2 equivalence classes. [2025-03-17 14:17:24,896 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 78 of 78 statements. [2025-03-17 14:17:24,896 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-17 14:17:24,896 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:17:24,901 INFO L256 TraceCheckSpWp]: Trace formula consists of 1428 conjuncts, 8 conjuncts are in the unsatisfiable core [2025-03-17 14:17:24,904 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-17 14:17:24,963 INFO L134 CoverageAnalysis]: Checked inductivity of 211 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2025-03-17 14:17:24,964 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-17 14:17:25,059 INFO L134 CoverageAnalysis]: Checked inductivity of 211 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2025-03-17 14:17:25,059 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [20682274] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-17 14:17:25,059 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-17 14:17:25,059 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 13 [2025-03-17 14:17:25,060 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1215015223] [2025-03-17 14:17:25,060 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-17 14:17:25,060 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2025-03-17 14:17:25,060 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 14:17:25,060 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2025-03-17 14:17:25,060 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2025-03-17 14:17:25,078 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 45 out of 73 [2025-03-17 14:17:25,079 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 97 places, 73 transitions, 292 flow. Second operand has 13 states, 13 states have (on average 51.15384615384615) internal successors, (665), 13 states have internal predecessors, (665), 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) [2025-03-17 14:17:25,079 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 14:17:25,079 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 45 of 73 [2025-03-17 14:17:25,079 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 14:17:25,259 INFO L124 PetriNetUnfolderBase]: 65/344 cut-off events. [2025-03-17 14:17:25,259 INFO L125 PetriNetUnfolderBase]: For 225/225 co-relation queries the response was YES. [2025-03-17 14:17:25,260 INFO L83 FinitePrefix]: Finished finitePrefix Result has 730 conditions, 344 events. 65/344 cut-off events. For 225/225 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 1104 event pairs, 63 based on Foata normal form. 4/304 useless extension candidates. Maximal degree in co-relation 706. Up to 158 conditions per place. [2025-03-17 14:17:25,261 INFO L140 encePairwiseOnDemand]: 69/73 looper letters, 90 selfloop transitions, 12 changer transitions 0/126 dead transitions. [2025-03-17 14:17:25,261 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 108 places, 126 transitions, 728 flow [2025-03-17 14:17:25,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2025-03-17 14:17:25,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2025-03-17 14:17:25,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 636 transitions. [2025-03-17 14:17:25,262 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.726027397260274 [2025-03-17 14:17:25,262 INFO L175 Difference]: Start difference. First operand has 97 places, 73 transitions, 292 flow. Second operand 12 states and 636 transitions. [2025-03-17 14:17:25,262 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 108 places, 126 transitions, 728 flow [2025-03-17 14:17:25,264 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 106 places, 126 transitions, 724 flow, removed 0 selfloop flow, removed 2 redundant places. [2025-03-17 14:17:25,265 INFO L231 Difference]: Finished difference. Result has 111 places, 78 transitions, 387 flow [2025-03-17 14:17:25,265 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=73, PETRI_DIFFERENCE_MINUEND_FLOW=288, PETRI_DIFFERENCE_MINUEND_PLACES=95, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=73, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=65, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=387, PETRI_PLACES=111, PETRI_TRANSITIONS=78} [2025-03-17 14:17:25,265 INFO L279 CegarLoopForPetriNet]: 74 programPoint places, 37 predicate places. [2025-03-17 14:17:25,265 INFO L471 AbstractCegarLoop]: Abstraction has has 111 places, 78 transitions, 387 flow [2025-03-17 14:17:25,266 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 51.15384615384615) internal successors, (665), 13 states have internal predecessors, (665), 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) [2025-03-17 14:17:25,266 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 14:17:25,266 INFO L206 CegarLoopForPetriNet]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 14:17:25,277 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2025-03-17 14:17:25,466 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2025-03-17 14:17:25,466 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr23REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr24REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr21REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 47 more)] === [2025-03-17 14:17:25,467 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 14:17:25,467 INFO L85 PathProgramCache]: Analyzing trace with hash 1713264000, now seen corresponding path program 3 times [2025-03-17 14:17:25,467 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 14:17:25,467 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1723897838] [2025-03-17 14:17:25,467 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-17 14:17:25,467 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 14:17:25,522 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 118 statements into 11 equivalence classes. [2025-03-17 14:17:25,531 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) and asserted 20 of 118 statements. [2025-03-17 14:17:25,531 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2025-03-17 14:17:25,531 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:17:25,626 INFO L134 CoverageAnalysis]: Checked inductivity of 515 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 478 trivial. 0 not checked. [2025-03-17 14:17:25,626 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 14:17:25,626 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1723897838] [2025-03-17 14:17:25,626 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1723897838] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-17 14:17:25,626 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1000330431] [2025-03-17 14:17:25,626 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-17 14:17:25,626 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 14:17:25,626 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-17 14:17:25,628 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-17 14:17:25,630 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2025-03-17 14:17:25,847 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 118 statements into 11 equivalence classes. [2025-03-17 14:17:25,879 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) and asserted 20 of 118 statements. [2025-03-17 14:17:25,879 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2025-03-17 14:17:25,879 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:17:25,881 INFO L256 TraceCheckSpWp]: Trace formula consists of 397 conjuncts, 6 conjuncts are in the unsatisfiable core [2025-03-17 14:17:25,885 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-17 14:17:26,301 INFO L134 CoverageAnalysis]: Checked inductivity of 515 backedges. 37 proven. 0 refuted. 0 times theorem prover too weak. 478 trivial. 0 not checked. [2025-03-17 14:17:26,301 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-03-17 14:17:26,301 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1000330431] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-17 14:17:26,301 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2025-03-17 14:17:26,301 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 9 [2025-03-17 14:17:26,301 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1773102137] [2025-03-17 14:17:26,301 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-17 14:17:26,302 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2025-03-17 14:17:26,302 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 14:17:26,302 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2025-03-17 14:17:26,302 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2025-03-17 14:17:26,401 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 44 out of 73 [2025-03-17 14:17:26,401 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 111 places, 78 transitions, 387 flow. Second operand has 7 states, 7 states have (on average 46.57142857142857) internal successors, (326), 7 states have internal predecessors, (326), 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) [2025-03-17 14:17:26,401 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 14:17:26,401 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 44 of 73 [2025-03-17 14:17:26,401 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 14:17:26,517 INFO L124 PetriNetUnfolderBase]: 71/384 cut-off events. [2025-03-17 14:17:26,517 INFO L125 PetriNetUnfolderBase]: For 325/325 co-relation queries the response was YES. [2025-03-17 14:17:26,518 INFO L83 FinitePrefix]: Finished finitePrefix Result has 812 conditions, 384 events. 71/384 cut-off events. For 325/325 co-relation queries the response was YES. Maximal size of possible extension queue 27. Compared 1471 event pairs, 18 based on Foata normal form. 2/328 useless extension candidates. Maximal degree in co-relation 783. Up to 126 conditions per place. [2025-03-17 14:17:26,519 INFO L140 encePairwiseOnDemand]: 64/73 looper letters, 46 selfloop transitions, 22 changer transitions 3/94 dead transitions. [2025-03-17 14:17:26,519 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 117 places, 94 transitions, 561 flow [2025-03-17 14:17:26,521 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2025-03-17 14:17:26,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2025-03-17 14:17:26,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 355 transitions. [2025-03-17 14:17:26,522 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6947162426614482 [2025-03-17 14:17:26,522 INFO L175 Difference]: Start difference. First operand has 111 places, 78 transitions, 387 flow. Second operand 7 states and 355 transitions. [2025-03-17 14:17:26,522 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 117 places, 94 transitions, 561 flow [2025-03-17 14:17:26,524 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 112 places, 94 transitions, 551 flow, removed 0 selfloop flow, removed 5 redundant places. [2025-03-17 14:17:26,525 INFO L231 Difference]: Finished difference. Result has 113 places, 80 transitions, 432 flow [2025-03-17 14:17:26,525 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=73, PETRI_DIFFERENCE_MINUEND_FLOW=377, PETRI_DIFFERENCE_MINUEND_PLACES=106, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=78, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=432, PETRI_PLACES=113, PETRI_TRANSITIONS=80} [2025-03-17 14:17:26,525 INFO L279 CegarLoopForPetriNet]: 74 programPoint places, 39 predicate places. [2025-03-17 14:17:26,525 INFO L471 AbstractCegarLoop]: Abstraction has has 113 places, 80 transitions, 432 flow [2025-03-17 14:17:26,526 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 46.57142857142857) internal successors, (326), 7 states have internal predecessors, (326), 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) [2025-03-17 14:17:26,526 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 14:17:26,526 INFO L206 CegarLoopForPetriNet]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 14:17:26,532 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2025-03-17 14:17:26,726 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2025-03-17 14:17:26,726 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting t_funErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr23REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr24REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr21REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 47 more)] === [2025-03-17 14:17:26,727 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 14:17:26,727 INFO L85 PathProgramCache]: Analyzing trace with hash 1714212207, now seen corresponding path program 1 times [2025-03-17 14:17:26,727 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 14:17:26,727 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [751861663] [2025-03-17 14:17:26,727 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 14:17:26,727 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 14:17:26,778 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 118 statements into 1 equivalence classes. [2025-03-17 14:17:26,829 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 118 of 118 statements. [2025-03-17 14:17:26,829 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 14:17:26,829 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:17:27,094 INFO L134 CoverageAnalysis]: Checked inductivity of 515 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 515 trivial. 0 not checked. [2025-03-17 14:17:27,095 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 14:17:27,095 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [751861663] [2025-03-17 14:17:27,095 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [751861663] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-17 14:17:27,095 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-17 14:17:27,095 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2025-03-17 14:17:27,095 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [24367893] [2025-03-17 14:17:27,095 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-17 14:17:27,095 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2025-03-17 14:17:27,095 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 14:17:27,095 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2025-03-17 14:17:27,095 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-03-17 14:17:27,129 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 43 out of 73 [2025-03-17 14:17:27,130 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 113 places, 80 transitions, 432 flow. Second operand has 3 states, 3 states have (on average 48.333333333333336) internal successors, (145), 3 states have internal predecessors, (145), 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) [2025-03-17 14:17:27,130 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 14:17:27,130 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 43 of 73 [2025-03-17 14:17:27,130 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 14:17:27,224 INFO L124 PetriNetUnfolderBase]: 65/351 cut-off events. [2025-03-17 14:17:27,224 INFO L125 PetriNetUnfolderBase]: For 397/397 co-relation queries the response was YES. [2025-03-17 14:17:27,225 INFO L83 FinitePrefix]: Finished finitePrefix Result has 825 conditions, 351 events. 65/351 cut-off events. For 397/397 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 1163 event pairs, 50 based on Foata normal form. 8/319 useless extension candidates. Maximal degree in co-relation 793. Up to 214 conditions per place. [2025-03-17 14:17:27,226 INFO L140 encePairwiseOnDemand]: 69/73 looper letters, 60 selfloop transitions, 3 changer transitions 0/85 dead transitions. [2025-03-17 14:17:27,226 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 113 places, 85 transitions, 570 flow [2025-03-17 14:17:27,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-03-17 14:17:27,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2025-03-17 14:17:27,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 166 transitions. [2025-03-17 14:17:27,227 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.7579908675799086 [2025-03-17 14:17:27,227 INFO L175 Difference]: Start difference. First operand has 113 places, 80 transitions, 432 flow. Second operand 3 states and 166 transitions. [2025-03-17 14:17:27,227 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 113 places, 85 transitions, 570 flow [2025-03-17 14:17:27,229 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 109 places, 85 transitions, 533 flow, removed 1 selfloop flow, removed 4 redundant places. [2025-03-17 14:17:27,230 INFO L231 Difference]: Finished difference. Result has 109 places, 78 transitions, 398 flow [2025-03-17 14:17:27,230 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=73, PETRI_DIFFERENCE_MINUEND_FLOW=392, PETRI_DIFFERENCE_MINUEND_PLACES=107, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=78, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=75, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=398, PETRI_PLACES=109, PETRI_TRANSITIONS=78} [2025-03-17 14:17:27,232 INFO L279 CegarLoopForPetriNet]: 74 programPoint places, 35 predicate places. [2025-03-17 14:17:27,232 INFO L471 AbstractCegarLoop]: Abstraction has has 109 places, 78 transitions, 398 flow [2025-03-17 14:17:27,232 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 48.333333333333336) internal successors, (145), 3 states have internal predecessors, (145), 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) [2025-03-17 14:17:27,232 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 14:17:27,232 INFO L206 CegarLoopForPetriNet]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 14:17:27,232 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2025-03-17 14:17:27,232 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting t_funErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr23REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr24REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr21REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 47 more)] === [2025-03-17 14:17:27,233 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 14:17:27,233 INFO L85 PathProgramCache]: Analyzing trace with hash 1714212206, now seen corresponding path program 1 times [2025-03-17 14:17:27,233 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 14:17:27,233 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [944363029] [2025-03-17 14:17:27,233 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 14:17:27,233 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 14:17:27,282 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 118 statements into 1 equivalence classes. [2025-03-17 14:17:27,307 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 118 of 118 statements. [2025-03-17 14:17:27,307 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 14:17:27,307 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:17:27,466 INFO L134 CoverageAnalysis]: Checked inductivity of 515 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 515 trivial. 0 not checked. [2025-03-17 14:17:27,467 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 14:17:27,467 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [944363029] [2025-03-17 14:17:27,467 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [944363029] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-17 14:17:27,467 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-17 14:17:27,467 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2025-03-17 14:17:27,467 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1623144404] [2025-03-17 14:17:27,467 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-17 14:17:27,468 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2025-03-17 14:17:27,469 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 14:17:27,469 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2025-03-17 14:17:27,469 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-03-17 14:17:27,499 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 42 out of 73 [2025-03-17 14:17:27,499 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 109 places, 78 transitions, 398 flow. Second operand has 3 states, 3 states have (on average 47.333333333333336) internal successors, (142), 3 states have internal predecessors, (142), 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) [2025-03-17 14:17:27,499 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 14:17:27,499 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 42 of 73 [2025-03-17 14:17:27,500 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 14:17:27,581 INFO L124 PetriNetUnfolderBase]: 72/345 cut-off events. [2025-03-17 14:17:27,581 INFO L125 PetriNetUnfolderBase]: For 334/334 co-relation queries the response was YES. [2025-03-17 14:17:27,582 INFO L83 FinitePrefix]: Finished finitePrefix Result has 816 conditions, 345 events. 72/345 cut-off events. For 334/334 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 1061 event pairs, 51 based on Foata normal form. 8/320 useless extension candidates. Maximal degree in co-relation 785. Up to 214 conditions per place. [2025-03-17 14:17:27,583 INFO L140 encePairwiseOnDemand]: 69/73 looper letters, 61 selfloop transitions, 3 changer transitions 0/83 dead transitions. [2025-03-17 14:17:27,583 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 109 places, 83 transitions, 537 flow [2025-03-17 14:17:27,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-03-17 14:17:27,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2025-03-17 14:17:27,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 164 transitions. [2025-03-17 14:17:27,584 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.7488584474885844 [2025-03-17 14:17:27,584 INFO L175 Difference]: Start difference. First operand has 109 places, 78 transitions, 398 flow. Second operand 3 states and 164 transitions. [2025-03-17 14:17:27,584 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 109 places, 83 transitions, 537 flow [2025-03-17 14:17:27,586 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 107 places, 83 transitions, 531 flow, removed 0 selfloop flow, removed 2 redundant places. [2025-03-17 14:17:27,587 INFO L231 Difference]: Finished difference. Result has 107 places, 76 transitions, 394 flow [2025-03-17 14:17:27,587 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=73, PETRI_DIFFERENCE_MINUEND_FLOW=388, PETRI_DIFFERENCE_MINUEND_PLACES=105, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=76, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=394, PETRI_PLACES=107, PETRI_TRANSITIONS=76} [2025-03-17 14:17:27,587 INFO L279 CegarLoopForPetriNet]: 74 programPoint places, 33 predicate places. [2025-03-17 14:17:27,587 INFO L471 AbstractCegarLoop]: Abstraction has has 107 places, 76 transitions, 394 flow [2025-03-17 14:17:27,588 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 47.333333333333336) internal successors, (142), 3 states have internal predecessors, (142), 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) [2025-03-17 14:17:27,589 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 14:17:27,589 INFO L206 CegarLoopForPetriNet]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 14:17:27,589 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2025-03-17 14:17:27,590 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr23REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr24REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr21REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 47 more)] === [2025-03-17 14:17:27,590 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 14:17:27,590 INFO L85 PathProgramCache]: Analyzing trace with hash 1571576883, now seen corresponding path program 1 times [2025-03-17 14:17:27,590 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 14:17:27,590 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1742816685] [2025-03-17 14:17:27,590 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 14:17:27,591 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 14:17:27,644 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 119 statements into 1 equivalence classes. [2025-03-17 14:17:29,008 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 119 of 119 statements. [2025-03-17 14:17:29,008 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 14:17:29,008 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:18:20,005 INFO L134 CoverageAnalysis]: Checked inductivity of 515 backedges. 0 proven. 460 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2025-03-17 14:18:20,006 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 14:18:20,006 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1742816685] [2025-03-17 14:18:20,006 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1742816685] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-17 14:18:20,006 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1261178312] [2025-03-17 14:18:20,006 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 14:18:20,006 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 14:18:20,006 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-17 14:18:20,008 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-17 14:18:20,008 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2025-03-17 14:18:20,267 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 119 statements into 1 equivalence classes. [2025-03-17 14:18:21,701 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 119 of 119 statements. [2025-03-17 14:18:21,701 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 14:18:21,701 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:18:21,717 INFO L256 TraceCheckSpWp]: Trace formula consists of 2216 conjuncts, 410 conjuncts are in the unsatisfiable core [2025-03-17 14:18:21,726 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-17 14:18:22,917 INFO L378 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 [2025-03-17 14:18:23,159 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2025-03-17 14:18:23,170 INFO L349 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2025-03-17 14:18:23,170 INFO L378 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 16 treesize of output 18 [2025-03-17 14:18:23,178 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2025-03-17 14:18:23,859 INFO L349 Elim1Store]: treesize reduction 30, result has 37.5 percent of original size [2025-03-17 14:18:23,859 INFO L378 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 21 treesize of output 29 [2025-03-17 14:18:23,879 INFO L349 Elim1Store]: treesize reduction 27, result has 15.6 percent of original size [2025-03-17 14:18:23,879 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 26 [2025-03-17 14:18:24,216 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2025-03-17 14:18:24,225 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 52 treesize of output 28 [2025-03-17 14:18:24,239 INFO L349 Elim1Store]: treesize reduction 8, result has 70.4 percent of original size [2025-03-17 14:18:24,240 INFO L378 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 26 treesize of output 28 [2025-03-17 14:18:24,257 INFO L349 Elim1Store]: treesize reduction 39, result has 18.8 percent of original size [2025-03-17 14:18:24,257 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 34 treesize of output 39 [2025-03-17 14:18:25,001 INFO L349 Elim1Store]: treesize reduction 4, result has 71.4 percent of original size [2025-03-17 14:18:25,001 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 17 [2025-03-17 14:18:25,012 INFO L349 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2025-03-17 14:18:25,012 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 32 [2025-03-17 14:18:25,341 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 70 treesize of output 41 [2025-03-17 14:18:25,363 INFO L349 Elim1Store]: treesize reduction 108, result has 22.9 percent of original size [2025-03-17 14:18:25,363 INFO L378 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 4 case distinctions, treesize of input 38 treesize of output 46 [2025-03-17 14:18:25,378 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 32 [2025-03-17 14:18:25,834 INFO L378 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 [2025-03-17 14:18:25,864 INFO L349 Elim1Store]: treesize reduction 162, result has 18.6 percent of original size [2025-03-17 14:18:25,865 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 8 case distinctions, treesize of input 43 treesize of output 54 [2025-03-17 14:18:26,293 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-03-17 14:18:26,294 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 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 39 treesize of output 44 [2025-03-17 14:18:26,307 INFO L349 Elim1Store]: treesize reduction 4, result has 71.4 percent of original size [2025-03-17 14:18:26,307 INFO L378 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 17 treesize of output 17 [2025-03-17 14:18:26,346 INFO L349 Elim1Store]: treesize reduction 234, result has 13.7 percent of original size [2025-03-17 14:18:26,347 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 12 case distinctions, treesize of input 54 treesize of output 68 [2025-03-17 14:18:26,354 INFO L378 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 81 treesize of output 49 [2025-03-17 14:18:27,357 INFO L349 Elim1Store]: treesize reduction 328, result has 13.9 percent of original size [2025-03-17 14:18:27,357 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 3 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 18 case distinctions, treesize of input 59 treesize of output 76 [2025-03-17 14:18:27,930 INFO L349 Elim1Store]: treesize reduction 466, result has 12.1 percent of original size [2025-03-17 14:18:27,931 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 3 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 25 case distinctions, treesize of input 70 treesize of output 90 [2025-03-17 14:18:27,939 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 10 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 102 treesize of output 67 [2025-03-17 14:18:27,956 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 10 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 56 [2025-03-17 14:18:29,123 INFO L349 Elim1Store]: treesize reduction 564, result has 10.9 percent of original size [2025-03-17 14:18:29,123 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 8 select indices, 8 select index equivalence classes, 3 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 33 case distinctions, treesize of input 75 treesize of output 98 [2025-03-17 14:18:29,161 INFO L378 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 [2025-03-17 14:18:29,706 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 15 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 113 treesize of output 81 [2025-03-17 14:18:29,725 INFO L190 IndexEqualityManager]: detected not equals via solver [2025-03-17 14:18:29,817 INFO L349 Elim1Store]: treesize reduction 704, result has 8.9 percent of original size [2025-03-17 14:18:29,817 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 9 select indices, 9 select index equivalence classes, 4 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 41 case distinctions, treesize of input 86 treesize of output 112 [2025-03-17 14:18:29,829 INFO L349 Elim1Store]: treesize reduction 4, result has 71.4 percent of original size [2025-03-17 14:18:29,829 INFO L378 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 17 treesize of output 17 [2025-03-17 14:18:29,849 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 15 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 57 treesize of output 68 [2025-03-17 14:18:30,943 INFO L378 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 [2025-03-17 14:18:31,098 INFO L349 Elim1Store]: treesize reduction 842, result has 9.2 percent of original size [2025-03-17 14:18:31,098 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 10 select indices, 10 select index equivalence classes, 4 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 51 case distinctions, treesize of input 91 treesize of output 120 [2025-03-17 14:18:31,763 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-03-17 14:18:31,763 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 66 treesize of output 80 [2025-03-17 14:18:31,787 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 21 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 134 treesize of output 99 [2025-03-17 14:18:31,808 INFO L190 IndexEqualityManager]: detected not equals via solver [2025-03-17 14:18:31,981 INFO L349 Elim1Store]: treesize reduction 1016, result has 7.7 percent of original size [2025-03-17 14:18:31,981 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 11 select indices, 11 select index equivalence classes, 5 disjoint index pairs (out of 55 index pairs), introduced 11 new quantified variables, introduced 61 case distinctions, treesize of input 102 treesize of output 134 [2025-03-17 14:18:32,004 INFO L349 Elim1Store]: treesize reduction 4, result has 71.4 percent of original size [2025-03-17 14:18:32,004 INFO L378 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 17 treesize of output 17 [2025-03-17 14:18:32,926 INFO L378 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 [2025-03-17 14:18:33,184 INFO L349 Elim1Store]: treesize reduction 1176, result has 7.9 percent of original size [2025-03-17 14:18:33,184 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 12 select indices, 12 select index equivalence classes, 5 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 73 case distinctions, treesize of input 107 treesize of output 142 [2025-03-17 14:18:33,991 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-03-17 14:18:33,991 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 21 case distinctions, treesize of input 75 treesize of output 92 [2025-03-17 14:18:34,019 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 28 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 155 treesize of output 117 [2025-03-17 14:18:34,036 INFO L190 IndexEqualityManager]: detected not equals via solver [2025-03-17 14:18:34,294 INFO L349 Elim1Store]: treesize reduction 1384, result has 6.8 percent of original size [2025-03-17 14:18:34,294 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 13 select indices, 13 select index equivalence classes, 6 disjoint index pairs (out of 78 index pairs), introduced 13 new quantified variables, introduced 85 case distinctions, treesize of input 118 treesize of output 156 [2025-03-17 14:18:34,311 INFO L349 Elim1Store]: treesize reduction 4, result has 71.4 percent of original size [2025-03-17 14:18:34,311 INFO L378 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 17 treesize of output 17 [2025-03-17 14:18:35,784 INFO L349 Elim1Store]: treesize reduction 1566, result has 7.0 percent of original size [2025-03-17 14:18:35,785 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 14 select indices, 14 select index equivalence classes, 6 disjoint index pairs (out of 91 index pairs), introduced 14 new quantified variables, introduced 99 case distinctions, treesize of input 123 treesize of output 164 [2025-03-17 14:18:35,838 INFO L378 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 [2025-03-17 14:18:36,707 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-03-17 14:18:36,708 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 84 treesize of output 104 [2025-03-17 14:18:36,732 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 36 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 0 case distinctions, treesize of input 176 treesize of output 135 [2025-03-17 14:18:36,757 INFO L190 IndexEqualityManager]: detected not equals via solver