./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/valid-memsafety.prp --file ../../../trunk/examples/svcomp/goblint-regression/09-regions_19-nested_nr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version da043454 Calling Ultimate with: /root/.sdkman/candidates/java/21.0.5-tem/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.6.800.v20240513-1750.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i ../../../trunk/examples/svcomp/goblint-regression/09-regions_19-nested_nr.c -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 280c30f41ca2c9f436a7f638405780966a2e3953046793cbc3431544593edf02 --- Real Ultimate output --- This is Ultimate 0.3.0-wip.fs.system-includes-da04345-m [2025-04-29 11:16:08,653 INFO L188 SettingsManager]: Resetting all preferences to default values... [2025-04-29 11:16:08,698 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2025-04-29 11:16:08,701 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2025-04-29 11:16:08,701 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2025-04-29 11:16:08,717 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2025-04-29 11:16:08,718 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2025-04-29 11:16:08,718 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2025-04-29 11:16:08,718 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2025-04-29 11:16:08,718 INFO L153 SettingsManager]: * Use memory slicer=true [2025-04-29 11:16:08,718 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2025-04-29 11:16:08,718 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2025-04-29 11:16:08,719 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2025-04-29 11:16:08,719 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2025-04-29 11:16:08,719 INFO L153 SettingsManager]: * Use SBE=true [2025-04-29 11:16:08,719 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2025-04-29 11:16:08,719 INFO L153 SettingsManager]: * sizeof long=4 [2025-04-29 11:16:08,719 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2025-04-29 11:16:08,719 INFO L153 SettingsManager]: * sizeof POINTER=4 [2025-04-29 11:16:08,719 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2025-04-29 11:16:08,719 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2025-04-29 11:16:08,719 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2025-04-29 11:16:08,719 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2025-04-29 11:16:08,720 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2025-04-29 11:16:08,720 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2025-04-29 11:16:08,720 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2025-04-29 11:16:08,720 INFO L153 SettingsManager]: * sizeof long double=12 [2025-04-29 11:16:08,720 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2025-04-29 11:16:08,720 INFO L153 SettingsManager]: * Use constant arrays=true [2025-04-29 11:16:08,720 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2025-04-29 11:16:08,720 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2025-04-29 11:16:08,720 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2025-04-29 11:16:08,720 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2025-04-29 11:16:08,720 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-04-29 11:16:08,721 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2025-04-29 11:16:08,721 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2025-04-29 11:16:08,721 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2025-04-29 11:16:08,721 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2025-04-29 11:16:08,721 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-04-29 11:16:08,721 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2025-04-29 11:16:08,721 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2025-04-29 11:16:08,721 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2025-04-29 11:16:08,721 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2025-04-29 11:16:08,721 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2025-04-29 11:16:08,722 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2025-04-29 11:16:08,722 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2025-04-29 11:16:08,722 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 -> 280c30f41ca2c9f436a7f638405780966a2e3953046793cbc3431544593edf02 [2025-04-29 11:16:08,937 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2025-04-29 11:16:08,942 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2025-04-29 11:16:08,944 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2025-04-29 11:16:08,945 INFO L270 PluginConnector]: Initializing CDTParser... [2025-04-29 11:16:08,945 INFO L274 PluginConnector]: CDTParser initialized [2025-04-29 11:16:08,946 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/goblint-regression/09-regions_19-nested_nr.c [2025-04-29 11:16:10,195 INFO L538 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a469f1062/4bf2c904795e4052b8928f8b25e7878b/FLAG21bde049a [2025-04-29 11:16:10,375 INFO L389 CDTParser]: Found 1 translation units. [2025-04-29 11:16:10,382 INFO L178 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/goblint-regression/09-regions_19-nested_nr.c [2025-04-29 11:16:10,384 WARN L117 ultiparseSymbolTable]: System include pthread.h could not be resolved by CDT -- only built-in system includes are available. [2025-04-29 11:16:10,384 WARN L117 ultiparseSymbolTable]: System include stdlib.h could not be resolved by CDT -- only built-in system includes are available. [2025-04-29 11:16:10,384 WARN L117 ultiparseSymbolTable]: System include stdio.h could not be resolved by CDT -- only built-in system includes are available. [2025-04-29 11:16:10,391 INFO L432 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a469f1062/4bf2c904795e4052b8928f8b25e7878b/FLAG21bde049a [2025-04-29 11:16:11,246 INFO L440 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a469f1062/4bf2c904795e4052b8928f8b25e7878b [2025-04-29 11:16:11,248 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2025-04-29 11:16:11,249 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2025-04-29 11:16:11,250 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2025-04-29 11:16:11,250 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2025-04-29 11:16:11,252 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2025-04-29 11:16:11,253 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.04 11:16:11" (1/1) ... [2025-04-29 11:16:11,254 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@20e8f1f4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.04 11:16:11, skipping insertion in model container [2025-04-29 11:16:11,254 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.04 11:16:11" (1/1) ... [2025-04-29 11:16:11,262 INFO L175 MainTranslator]: Built tables and reachable declarations [2025-04-29 11:16:11,437 INFO L211 PostProcessor]: Analyzing one entry point: main [2025-04-29 11:16:11,451 INFO L200 MainTranslator]: Completed pre-run [2025-04-29 11:16:11,483 INFO L211 PostProcessor]: Analyzing one entry point: main [2025-04-29 11:16:11,500 INFO L204 MainTranslator]: Completed translation [2025-04-29 11:16:11,501 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.04 11:16:11 WrapperNode [2025-04-29 11:16:11,501 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2025-04-29 11:16:11,503 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2025-04-29 11:16:11,503 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2025-04-29 11:16:11,503 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2025-04-29 11:16:11,507 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.04 11:16:11" (1/1) ... [2025-04-29 11:16:11,518 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.04 11:16:11" (1/1) ... [2025-04-29 11:16:11,543 INFO L138 Inliner]: procedures = 20, calls = 47, calls flagged for inlining = 9, calls inlined = 9, statements flattened = 140 [2025-04-29 11:16:11,543 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2025-04-29 11:16:11,544 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2025-04-29 11:16:11,544 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2025-04-29 11:16:11,544 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2025-04-29 11:16:11,551 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.04 11:16:11" (1/1) ... [2025-04-29 11:16:11,552 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.04 11:16:11" (1/1) ... [2025-04-29 11:16:11,557 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.04 11:16:11" (1/1) ... [2025-04-29 11:16:11,578 INFO L175 MemorySlicer]: Split 38 memory accesses to 2 slices as follows [24, 14]. 63 percent of accesses are in the largest equivalence class. The 20 initializations are split as follows [20, 0]. The 11 writes are split as follows [1, 10]. [2025-04-29 11:16:11,578 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.04 11:16:11" (1/1) ... [2025-04-29 11:16:11,579 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.04 11:16:11" (1/1) ... [2025-04-29 11:16:11,587 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.04 11:16:11" (1/1) ... [2025-04-29 11:16:11,588 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.04 11:16:11" (1/1) ... [2025-04-29 11:16:11,589 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.04 11:16:11" (1/1) ... [2025-04-29 11:16:11,590 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.04 11:16:11" (1/1) ... [2025-04-29 11:16:11,591 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.04 11:16:11" (1/1) ... [2025-04-29 11:16:11,597 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2025-04-29 11:16:11,601 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2025-04-29 11:16:11,601 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2025-04-29 11:16:11,601 INFO L274 PluginConnector]: RCFGBuilder initialized [2025-04-29 11:16:11,602 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.04 11:16:11" (1/1) ... [2025-04-29 11:16:11,605 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-04-29 11:16:11,616 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-29 11:16:11,627 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2025-04-29 11:16:11,633 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2025-04-29 11:16:11,646 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#0 [2025-04-29 11:16:11,646 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#1 [2025-04-29 11:16:11,646 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#0 [2025-04-29 11:16:11,646 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#1 [2025-04-29 11:16:11,647 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2025-04-29 11:16:11,647 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2025-04-29 11:16:11,647 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2025-04-29 11:16:11,647 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2025-04-29 11:16:11,647 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#0 [2025-04-29 11:16:11,647 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#1 [2025-04-29 11:16:11,647 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2025-04-29 11:16:11,647 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2025-04-29 11:16:11,647 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2025-04-29 11:16:11,647 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexUnlock [2025-04-29 11:16:11,647 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2025-04-29 11:16:11,647 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2025-04-29 11:16:11,647 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2025-04-29 11:16:11,647 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2025-04-29 11:16:11,647 INFO L130 BoogieDeclarations]: Found specification of procedure t_fun [2025-04-29 11:16:11,647 INFO L138 BoogieDeclarations]: Found implementation of procedure t_fun [2025-04-29 11:16:11,648 WARN L203 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2025-04-29 11:16:11,728 INFO L234 CfgBuilder]: Building ICFG [2025-04-29 11:16:11,729 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2025-04-29 11:16:11,981 INFO L279 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2025-04-29 11:16:11,981 INFO L283 CfgBuilder]: Performing block encoding [2025-04-29 11:16:12,143 INFO L307 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2025-04-29 11:16:12,143 INFO L312 CfgBuilder]: Removed 0 assume(true) statements. [2025-04-29 11:16:12,143 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.04 11:16:12 BoogieIcfgContainer [2025-04-29 11:16:12,144 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2025-04-29 11:16:12,145 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2025-04-29 11:16:12,146 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2025-04-29 11:16:12,149 INFO L274 PluginConnector]: TraceAbstraction initialized [2025-04-29 11:16:12,149 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 29.04 11:16:11" (1/3) ... [2025-04-29 11:16:12,150 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@648620e1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.04 11:16:12, skipping insertion in model container [2025-04-29 11:16:12,150 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.04 11:16:11" (2/3) ... [2025-04-29 11:16:12,150 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@648620e1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.04 11:16:12, skipping insertion in model container [2025-04-29 11:16:12,150 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.04 11:16:12" (3/3) ... [2025-04-29 11:16:12,152 INFO L128 eAbstractionObserver]: Analyzing ICFG 09-regions_19-nested_nr.c [2025-04-29 11:16:12,161 INFO L217 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2025-04-29 11:16:12,162 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG 09-regions_19-nested_nr.c that has 2 procedures, 72 locations, 72 edges, 1 initial locations, 2 loop locations, and 37 error locations. [2025-04-29 11:16:12,163 INFO L490 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2025-04-29 11:16:12,224 INFO L143 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2025-04-29 11:16:12,249 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 75 places, 73 transitions, 150 flow [2025-04-29 11:16:12,282 INFO L116 PetriNetUnfolderBase]: 2/72 cut-off events. [2025-04-29 11:16:12,285 INFO L117 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2025-04-29 11:16:12,287 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 275 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. [2025-04-29 11:16:12,288 INFO L82 GeneralOperation]: Start removeDead. Operand has 75 places, 73 transitions, 150 flow [2025-04-29 11:16:12,290 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 74 places, 72 transitions, 147 flow [2025-04-29 11:16:12,297 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2025-04-29 11:16:12,308 INFO L340 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=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;@21bc0298, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2025-04-29 11:16:12,309 INFO L341 AbstractCegarLoop]: Starting to check reachability of 50 error locations. [2025-04-29 11:16:12,313 INFO L177 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2025-04-29 11:16:12,313 INFO L116 PetriNetUnfolderBase]: 1/6 cut-off events. [2025-04-29 11:16:12,314 INFO L117 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2025-04-29 11:16:12,314 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-29 11:16:12,314 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2025-04-29 11:16:12,314 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 47 more)] === [2025-04-29 11:16:12,318 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-29 11:16:12,319 INFO L85 PathProgramCache]: Analyzing trace with hash 13515641, now seen corresponding path program 1 times [2025-04-29 11:16:12,323 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-29 11:16:12,324 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [205722637] [2025-04-29 11:16:12,324 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-04-29 11:16:12,325 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-29 11:16:12,376 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 4 statements into 1 equivalence classes. [2025-04-29 11:16:12,391 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 4 of 4 statements. [2025-04-29 11:16:12,391 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-29 11:16:12,391 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-29 11:16:12,490 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-29 11:16:12,490 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-29 11:16:12,490 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [205722637] [2025-04-29 11:16:12,491 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [205722637] provided 1 perfect and 0 imperfect interpolant sequences [2025-04-29 11:16:12,491 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-04-29 11:16:12,491 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2025-04-29 11:16:12,492 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [564235699] [2025-04-29 11:16:12,492 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-04-29 11:16:12,497 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2025-04-29 11:16:12,500 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-29 11:16:12,516 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2025-04-29 11:16:12,516 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-04-29 11:16:12,518 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 45 out of 73 [2025-04-29 11:16:12,520 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) [2025-04-29 11:16:12,520 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-29 11:16:12,520 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 45 of 73 [2025-04-29 11:16:12,521 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-29 11:16:12,629 INFO L116 PetriNetUnfolderBase]: 65/269 cut-off events. [2025-04-29 11:16:12,629 INFO L117 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2025-04-29 11:16:12,630 INFO L83 FinitePrefix]: Finished finitePrefix Result has 429 conditions, 269 events. 65/269 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 24. Compared 1377 event pairs, 63 based on Foata normal form. 0/206 useless extension candidates. Maximal degree in co-relation 377. Up to 155 conditions per place. [2025-04-29 11:16:12,633 INFO L140 encePairwiseOnDemand]: 70/73 looper letters, 27 selfloop transitions, 2 changer transitions 0/73 dead transitions. [2025-04-29 11:16:12,634 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 73 transitions, 207 flow [2025-04-29 11:16:12,635 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-04-29 11:16:12,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2025-04-29 11:16:12,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 165 transitions. [2025-04-29 11:16:12,643 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.7534246575342466 [2025-04-29 11:16:12,644 INFO L175 Difference]: Start difference. First operand has 74 places, 72 transitions, 147 flow. Second operand 3 states and 165 transitions. [2025-04-29 11:16:12,645 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 73 transitions, 207 flow [2025-04-29 11:16:12,648 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 73 transitions, 206 flow, removed 0 selfloop flow, removed 1 redundant places. [2025-04-29 11:16:12,651 INFO L231 Difference]: Finished difference. Result has 76 places, 73 transitions, 158 flow [2025-04-29 11:16:12,653 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} [2025-04-29 11:16:12,655 INFO L279 CegarLoopForPetriNet]: 74 programPoint places, 2 predicate places. [2025-04-29 11:16:12,656 INFO L485 AbstractCegarLoop]: Abstraction has has 76 places, 73 transitions, 158 flow [2025-04-29 11:16:12,656 INFO L486 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) [2025-04-29 11:16:12,657 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-29 11:16:12,657 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2025-04-29 11:16:12,657 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2025-04-29 11:16:12,657 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 47 more)] === [2025-04-29 11:16:12,657 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-29 11:16:12,658 INFO L85 PathProgramCache]: Analyzing trace with hash 418941360, now seen corresponding path program 1 times [2025-04-29 11:16:12,658 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-29 11:16:12,658 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1506293400] [2025-04-29 11:16:12,658 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-04-29 11:16:12,658 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-29 11:16:12,670 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 5 statements into 1 equivalence classes. [2025-04-29 11:16:12,675 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 5 of 5 statements. [2025-04-29 11:16:12,675 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-29 11:16:12,676 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-29 11:16:12,719 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-29 11:16:12,720 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-29 11:16:12,720 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1506293400] [2025-04-29 11:16:12,720 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1506293400] provided 0 perfect and 1 imperfect interpolant sequences [2025-04-29 11:16:12,720 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [809463672] [2025-04-29 11:16:12,720 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-04-29 11:16:12,720 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-29 11:16:12,720 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-29 11:16:12,722 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-04-29 11:16:12,743 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2025-04-29 11:16:12,784 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 5 statements into 1 equivalence classes. [2025-04-29 11:16:12,797 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 5 of 5 statements. [2025-04-29 11:16:12,797 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-29 11:16:12,797 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-29 11:16:12,798 INFO L256 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 3 conjuncts are in the unsatisfiable core [2025-04-29 11:16:12,800 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-29 11:16:12,819 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-29 11:16:12,819 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-04-29 11:16:12,831 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-29 11:16:12,832 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [809463672] provided 0 perfect and 2 imperfect interpolant sequences [2025-04-29 11:16:12,832 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-04-29 11:16:12,832 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2025-04-29 11:16:12,832 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1582443376] [2025-04-29 11:16:12,832 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-04-29 11:16:12,833 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2025-04-29 11:16:12,833 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-29 11:16:12,833 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2025-04-29 11:16:12,833 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2025-04-29 11:16:12,834 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 45 out of 73 [2025-04-29 11:16:12,834 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) [2025-04-29 11:16:12,834 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-29 11:16:12,834 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 45 of 73 [2025-04-29 11:16:12,835 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-29 11:16:12,918 INFO L116 PetriNetUnfolderBase]: 65/272 cut-off events. [2025-04-29 11:16:12,919 INFO L117 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2025-04-29 11:16:12,919 INFO L83 FinitePrefix]: Finished finitePrefix Result has 444 conditions, 272 events. 65/272 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 1371 event pairs, 63 based on Foata normal form. 0/209 useless extension candidates. Maximal degree in co-relation 433. Up to 155 conditions per place. [2025-04-29 11:16:12,920 INFO L140 encePairwiseOnDemand]: 70/73 looper letters, 27 selfloop transitions, 5 changer transitions 0/76 dead transitions. [2025-04-29 11:16:12,920 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 81 places, 76 transitions, 234 flow [2025-04-29 11:16:12,921 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2025-04-29 11:16:12,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2025-04-29 11:16:12,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 305 transitions. [2025-04-29 11:16:12,926 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.6963470319634704 [2025-04-29 11:16:12,926 INFO L175 Difference]: Start difference. First operand has 76 places, 73 transitions, 158 flow. Second operand 6 states and 305 transitions. [2025-04-29 11:16:12,926 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 81 places, 76 transitions, 234 flow [2025-04-29 11:16:12,926 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 76 transitions, 230 flow, removed 1 selfloop flow, removed 1 redundant places. [2025-04-29 11:16:12,927 INFO L231 Difference]: Finished difference. Result has 83 places, 76 transitions, 190 flow [2025-04-29 11:16:12,927 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} [2025-04-29 11:16:12,927 INFO L279 CegarLoopForPetriNet]: 74 programPoint places, 9 predicate places. [2025-04-29 11:16:12,928 INFO L485 AbstractCegarLoop]: Abstraction has has 83 places, 76 transitions, 190 flow [2025-04-29 11:16:12,928 INFO L486 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) [2025-04-29 11:16:12,928 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-29 11:16:12,928 INFO L206 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1, 1] [2025-04-29 11:16:12,939 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2025-04-29 11:16:13,128 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-29 11:16:13,129 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 47 more)] === [2025-04-29 11:16:13,129 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-29 11:16:13,129 INFO L85 PathProgramCache]: Analyzing trace with hash -536112839, now seen corresponding path program 2 times [2025-04-29 11:16:13,129 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-29 11:16:13,129 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1107348082] [2025-04-29 11:16:13,129 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-04-29 11:16:13,129 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-29 11:16:13,135 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 8 statements into 2 equivalence classes. [2025-04-29 11:16:13,141 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) and asserted 4 of 8 statements. [2025-04-29 11:16:13,141 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2025-04-29 11:16:13,141 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-29 11:16:13,194 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2025-04-29 11:16:13,194 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-29 11:16:13,194 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1107348082] [2025-04-29 11:16:13,195 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1107348082] provided 1 perfect and 0 imperfect interpolant sequences [2025-04-29 11:16:13,195 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-04-29 11:16:13,195 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2025-04-29 11:16:13,195 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [545760327] [2025-04-29 11:16:13,195 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-04-29 11:16:13,195 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2025-04-29 11:16:13,195 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-29 11:16:13,195 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2025-04-29 11:16:13,195 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-04-29 11:16:13,237 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 39 out of 73 [2025-04-29 11:16:13,237 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) [2025-04-29 11:16:13,237 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-29 11:16:13,237 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 39 of 73 [2025-04-29 11:16:13,238 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-29 11:16:13,322 INFO L116 PetriNetUnfolderBase]: 65/268 cut-off events. [2025-04-29 11:16:13,322 INFO L117 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2025-04-29 11:16:13,326 INFO L83 FinitePrefix]: Finished finitePrefix Result has 455 conditions, 268 events. 65/268 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 1337 event pairs, 63 based on Foata normal form. 0/212 useless extension candidates. Maximal degree in co-relation 422. Up to 157 conditions per place. [2025-04-29 11:16:13,327 INFO L140 encePairwiseOnDemand]: 65/73 looper letters, 30 selfloop transitions, 4 changer transitions 0/72 dead transitions. [2025-04-29 11:16:13,327 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 81 places, 72 transitions, 250 flow [2025-04-29 11:16:13,328 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-04-29 11:16:13,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2025-04-29 11:16:13,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 151 transitions. [2025-04-29 11:16:13,329 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.6894977168949772 [2025-04-29 11:16:13,329 INFO L175 Difference]: Start difference. First operand has 83 places, 76 transitions, 190 flow. Second operand 3 states and 151 transitions. [2025-04-29 11:16:13,331 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 81 places, 72 transitions, 250 flow [2025-04-29 11:16:13,332 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 72 transitions, 236 flow, removed 6 selfloop flow, removed 1 redundant places. [2025-04-29 11:16:13,332 INFO L231 Difference]: Finished difference. Result has 80 places, 72 transitions, 176 flow [2025-04-29 11:16:13,333 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} [2025-04-29 11:16:13,333 INFO L279 CegarLoopForPetriNet]: 74 programPoint places, 6 predicate places. [2025-04-29 11:16:13,333 INFO L485 AbstractCegarLoop]: Abstraction has has 80 places, 72 transitions, 176 flow [2025-04-29 11:16:13,333 INFO L486 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) [2025-04-29 11:16:13,333 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-29 11:16:13,333 INFO L206 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1, 1] [2025-04-29 11:16:13,333 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2025-04-29 11:16:13,333 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 47 more)] === [2025-04-29 11:16:13,334 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-29 11:16:13,334 INFO L85 PathProgramCache]: Analyzing trace with hash -536112838, now seen corresponding path program 1 times [2025-04-29 11:16:13,334 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-29 11:16:13,334 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1305718371] [2025-04-29 11:16:13,334 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-04-29 11:16:13,334 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-29 11:16:13,345 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 8 statements into 1 equivalence classes. [2025-04-29 11:16:13,352 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 8 of 8 statements. [2025-04-29 11:16:13,353 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-29 11:16:13,353 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-29 11:16:13,448 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-29 11:16:13,448 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-29 11:16:13,448 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1305718371] [2025-04-29 11:16:13,448 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1305718371] provided 0 perfect and 1 imperfect interpolant sequences [2025-04-29 11:16:13,448 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1921607263] [2025-04-29 11:16:13,448 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-04-29 11:16:13,448 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-29 11:16:13,448 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-29 11:16:13,450 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-04-29 11:16:13,451 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2025-04-29 11:16:13,493 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 8 statements into 1 equivalence classes. [2025-04-29 11:16:13,509 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 8 of 8 statements. [2025-04-29 11:16:13,509 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-29 11:16:13,509 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-29 11:16:13,510 INFO L256 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 6 conjuncts are in the unsatisfiable core [2025-04-29 11:16:13,510 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-29 11:16:13,525 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-29 11:16:13,525 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-04-29 11:16:13,576 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-29 11:16:13,576 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1921607263] provided 0 perfect and 2 imperfect interpolant sequences [2025-04-29 11:16:13,576 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-04-29 11:16:13,576 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2025-04-29 11:16:13,576 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1583590379] [2025-04-29 11:16:13,576 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-04-29 11:16:13,576 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2025-04-29 11:16:13,577 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-29 11:16:13,577 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2025-04-29 11:16:13,577 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2025-04-29 11:16:13,579 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 45 out of 73 [2025-04-29 11:16:13,580 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) [2025-04-29 11:16:13,580 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-29 11:16:13,580 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 45 of 73 [2025-04-29 11:16:13,580 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-29 11:16:13,689 INFO L116 PetriNetUnfolderBase]: 65/274 cut-off events. [2025-04-29 11:16:13,691 INFO L117 PetriNetUnfolderBase]: For 27/27 co-relation queries the response was YES. [2025-04-29 11:16:13,692 INFO L83 FinitePrefix]: Finished finitePrefix Result has 475 conditions, 274 events. 65/274 cut-off events. For 27/27 co-relation queries the response was YES. Maximal size of possible extension queue 24. Compared 1354 event pairs, 63 based on Foata normal form. 6/223 useless extension candidates. Maximal degree in co-relation 432. Up to 155 conditions per place. [2025-04-29 11:16:13,693 INFO L140 encePairwiseOnDemand]: 70/73 looper letters, 27 selfloop transitions, 11 changer transitions 0/78 dead transitions. [2025-04-29 11:16:13,693 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 91 places, 78 transitions, 288 flow [2025-04-29 11:16:13,694 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2025-04-29 11:16:13,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2025-04-29 11:16:13,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 584 transitions. [2025-04-29 11:16:13,698 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.6666666666666666 [2025-04-29 11:16:13,698 INFO L175 Difference]: Start difference. First operand has 80 places, 72 transitions, 176 flow. Second operand 12 states and 584 transitions. [2025-04-29 11:16:13,699 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 91 places, 78 transitions, 288 flow [2025-04-29 11:16:13,700 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 89 places, 78 transitions, 280 flow, removed 0 selfloop flow, removed 2 redundant places. [2025-04-29 11:16:13,701 INFO L231 Difference]: Finished difference. Result has 95 places, 78 transitions, 252 flow [2025-04-29 11:16:13,702 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} [2025-04-29 11:16:13,702 INFO L279 CegarLoopForPetriNet]: 74 programPoint places, 21 predicate places. [2025-04-29 11:16:13,703 INFO L485 AbstractCegarLoop]: Abstraction has has 95 places, 78 transitions, 252 flow [2025-04-29 11:16:13,703 INFO L486 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) [2025-04-29 11:16:13,704 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-29 11:16:13,704 INFO L206 CegarLoopForPetriNet]: trace histogram [10, 1, 1, 1, 1] [2025-04-29 11:16:13,711 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2025-04-29 11:16:13,904 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2025-04-29 11:16:13,904 INFO L403 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 47 more)] === [2025-04-29 11:16:13,905 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-29 11:16:13,905 INFO L85 PathProgramCache]: Analyzing trace with hash -416485926, now seen corresponding path program 2 times [2025-04-29 11:16:13,905 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-29 11:16:13,905 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2108039095] [2025-04-29 11:16:13,905 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-04-29 11:16:13,905 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-29 11:16:13,912 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 14 statements into 2 equivalence classes. [2025-04-29 11:16:13,918 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) and asserted 4 of 14 statements. [2025-04-29 11:16:13,918 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2025-04-29 11:16:13,919 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-29 11:16:13,970 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2025-04-29 11:16:13,970 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-29 11:16:13,970 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2108039095] [2025-04-29 11:16:13,971 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2108039095] provided 1 perfect and 0 imperfect interpolant sequences [2025-04-29 11:16:13,971 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-04-29 11:16:13,971 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2025-04-29 11:16:13,971 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2058299478] [2025-04-29 11:16:13,971 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-04-29 11:16:13,972 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2025-04-29 11:16:13,972 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-29 11:16:13,972 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2025-04-29 11:16:13,972 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-04-29 11:16:14,012 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 41 out of 73 [2025-04-29 11:16:14,013 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) [2025-04-29 11:16:14,013 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-29 11:16:14,013 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 41 of 73 [2025-04-29 11:16:14,013 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-29 11:16:14,090 INFO L116 PetriNetUnfolderBase]: 65/270 cut-off events. [2025-04-29 11:16:14,091 INFO L117 PetriNetUnfolderBase]: For 31/31 co-relation queries the response was YES. [2025-04-29 11:16:14,092 INFO L83 FinitePrefix]: Finished finitePrefix Result has 497 conditions, 270 events. 65/270 cut-off events. For 31/31 co-relation queries the response was YES. Maximal size of possible extension queue 24. Compared 1315 event pairs, 63 based on Foata normal form. 2/216 useless extension candidates. Maximal degree in co-relation 422. Up to 163 conditions per place. [2025-04-29 11:16:14,093 INFO L140 encePairwiseOnDemand]: 65/73 looper letters, 34 selfloop transitions, 4 changer transitions 0/74 dead transitions. [2025-04-29 11:16:14,093 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 93 places, 74 transitions, 320 flow [2025-04-29 11:16:14,094 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-04-29 11:16:14,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2025-04-29 11:16:14,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 155 transitions. [2025-04-29 11:16:14,094 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.7077625570776256 [2025-04-29 11:16:14,095 INFO L175 Difference]: Start difference. First operand has 95 places, 78 transitions, 252 flow. Second operand 3 states and 155 transitions. [2025-04-29 11:16:14,095 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 93 places, 74 transitions, 320 flow [2025-04-29 11:16:14,096 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 88 places, 74 transitions, 272 flow, removed 19 selfloop flow, removed 5 redundant places. [2025-04-29 11:16:14,097 INFO L231 Difference]: Finished difference. Result has 88 places, 74 transitions, 204 flow [2025-04-29 11:16:14,097 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} [2025-04-29 11:16:14,100 INFO L279 CegarLoopForPetriNet]: 74 programPoint places, 14 predicate places. [2025-04-29 11:16:14,101 INFO L485 AbstractCegarLoop]: Abstraction has has 88 places, 74 transitions, 204 flow [2025-04-29 11:16:14,101 INFO L486 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) [2025-04-29 11:16:14,101 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-29 11:16:14,102 INFO L206 CegarLoopForPetriNet]: trace histogram [10, 1, 1, 1, 1, 1, 1] [2025-04-29 11:16:14,102 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2025-04-29 11:16:14,102 INFO L403 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 47 more)] === [2025-04-29 11:16:14,102 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-29 11:16:14,102 INFO L85 PathProgramCache]: Analyzing trace with hash -811005273, now seen corresponding path program 1 times [2025-04-29 11:16:14,102 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-29 11:16:14,102 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [162678878] [2025-04-29 11:16:14,102 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-04-29 11:16:14,103 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-29 11:16:14,111 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 16 statements into 1 equivalence classes. [2025-04-29 11:16:14,127 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 16 of 16 statements. [2025-04-29 11:16:14,127 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-29 11:16:14,127 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-29 11:16:14,341 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2025-04-29 11:16:14,341 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-29 11:16:14,341 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [162678878] [2025-04-29 11:16:14,341 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [162678878] provided 1 perfect and 0 imperfect interpolant sequences [2025-04-29 11:16:14,341 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-04-29 11:16:14,341 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2025-04-29 11:16:14,341 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1616048580] [2025-04-29 11:16:14,341 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-04-29 11:16:14,341 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2025-04-29 11:16:14,341 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-29 11:16:14,342 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2025-04-29 11:16:14,342 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2025-04-29 11:16:14,514 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 35 out of 73 [2025-04-29 11:16:14,515 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 88 places, 74 transitions, 204 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) [2025-04-29 11:16:14,515 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-29 11:16:14,515 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 35 of 73 [2025-04-29 11:16:14,515 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-29 11:16:14,655 INFO L116 PetriNetUnfolderBase]: 65/277 cut-off events. [2025-04-29 11:16:14,655 INFO L117 PetriNetUnfolderBase]: For 50/50 co-relation queries the response was YES. [2025-04-29 11:16:14,656 INFO L83 FinitePrefix]: Finished finitePrefix Result has 497 conditions, 277 events. 65/277 cut-off events. For 50/50 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 1261 event pairs, 63 based on Foata normal form. 11/237 useless extension candidates. Maximal degree in co-relation 446. Up to 166 conditions per place. [2025-04-29 11:16:14,657 INFO L140 encePairwiseOnDemand]: 59/73 looper letters, 40 selfloop transitions, 7 changer transitions 0/77 dead transitions. [2025-04-29 11:16:14,657 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 88 places, 77 transitions, 312 flow [2025-04-29 11:16:14,657 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-04-29 11:16:14,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2025-04-29 11:16:14,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 221 transitions. [2025-04-29 11:16:14,658 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.6054794520547945 [2025-04-29 11:16:14,658 INFO L175 Difference]: Start difference. First operand has 88 places, 74 transitions, 204 flow. Second operand 5 states and 221 transitions. [2025-04-29 11:16:14,658 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 88 places, 77 transitions, 312 flow [2025-04-29 11:16:14,659 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 86 places, 77 transitions, 296 flow, removed 0 selfloop flow, removed 2 redundant places. [2025-04-29 11:16:14,660 INFO L231 Difference]: Finished difference. Result has 88 places, 75 transitions, 238 flow [2025-04-29 11:16:14,660 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=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=238, PETRI_PLACES=88, PETRI_TRANSITIONS=75} [2025-04-29 11:16:14,661 INFO L279 CegarLoopForPetriNet]: 74 programPoint places, 14 predicate places. [2025-04-29 11:16:14,661 INFO L485 AbstractCegarLoop]: Abstraction has has 88 places, 75 transitions, 238 flow [2025-04-29 11:16:14,661 INFO L486 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) [2025-04-29 11:16:14,661 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-29 11:16:14,661 INFO L206 CegarLoopForPetriNet]: trace histogram [10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-29 11:16:14,661 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2025-04-29 11:16:14,661 INFO L403 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr12REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 47 more)] === [2025-04-29 11:16:14,662 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-29 11:16:14,662 INFO L85 PathProgramCache]: Analyzing trace with hash 1779866007, now seen corresponding path program 1 times [2025-04-29 11:16:14,662 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-29 11:16:14,662 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [355812572] [2025-04-29 11:16:14,662 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-04-29 11:16:14,662 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-29 11:16:14,672 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 20 statements into 1 equivalence classes. [2025-04-29 11:16:14,681 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 20 of 20 statements. [2025-04-29 11:16:14,682 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-29 11:16:14,682 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-29 11:16:14,916 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2025-04-29 11:16:14,916 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-29 11:16:14,916 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [355812572] [2025-04-29 11:16:14,917 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [355812572] provided 1 perfect and 0 imperfect interpolant sequences [2025-04-29 11:16:14,917 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-04-29 11:16:14,917 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2025-04-29 11:16:14,917 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [413771745] [2025-04-29 11:16:14,917 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-04-29 11:16:14,917 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2025-04-29 11:16:14,917 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-29 11:16:14,917 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2025-04-29 11:16:14,917 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2025-04-29 11:16:15,187 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 36 out of 73 [2025-04-29 11:16:15,188 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 88 places, 75 transitions, 238 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) [2025-04-29 11:16:15,188 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-29 11:16:15,188 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 36 of 73 [2025-04-29 11:16:15,188 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-29 11:16:15,309 INFO L116 PetriNetUnfolderBase]: 65/273 cut-off events. [2025-04-29 11:16:15,309 INFO L117 PetriNetUnfolderBase]: For 69/69 co-relation queries the response was YES. [2025-04-29 11:16:15,310 INFO L83 FinitePrefix]: Finished finitePrefix Result has 511 conditions, 273 events. 65/273 cut-off events. For 69/69 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 1236 event pairs, 63 based on Foata normal form. 0/228 useless extension candidates. Maximal degree in co-relation 457. Up to 160 conditions per place. [2025-04-29 11:16:15,311 INFO L140 encePairwiseOnDemand]: 65/73 looper letters, 35 selfloop transitions, 11 changer transitions 0/73 dead transitions. [2025-04-29 11:16:15,311 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 92 places, 73 transitions, 326 flow [2025-04-29 11:16:15,311 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2025-04-29 11:16:15,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2025-04-29 11:16:15,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 285 transitions. [2025-04-29 11:16:15,313 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.5577299412915852 [2025-04-29 11:16:15,313 INFO L175 Difference]: Start difference. First operand has 88 places, 75 transitions, 238 flow. Second operand 7 states and 285 transitions. [2025-04-29 11:16:15,314 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 92 places, 73 transitions, 326 flow [2025-04-29 11:16:15,315 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 90 places, 73 transitions, 322 flow, removed 0 selfloop flow, removed 2 redundant places. [2025-04-29 11:16:15,316 INFO L231 Difference]: Finished difference. Result has 90 places, 73 transitions, 252 flow [2025-04-29 11:16:15,316 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=73, PETRI_DIFFERENCE_MINUEND_FLOW=230, PETRI_DIFFERENCE_MINUEND_PLACES=84, 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=252, PETRI_PLACES=90, PETRI_TRANSITIONS=73} [2025-04-29 11:16:15,316 INFO L279 CegarLoopForPetriNet]: 74 programPoint places, 16 predicate places. [2025-04-29 11:16:15,316 INFO L485 AbstractCegarLoop]: Abstraction has has 90 places, 73 transitions, 252 flow [2025-04-29 11:16:15,319 INFO L486 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) [2025-04-29 11:16:15,319 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-29 11:16:15,319 INFO L206 CegarLoopForPetriNet]: trace histogram [10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-29 11:16:15,319 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2025-04-29 11:16:15,320 INFO L403 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 47 more)] === [2025-04-29 11:16:15,320 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-29 11:16:15,320 INFO L85 PathProgramCache]: Analyzing trace with hash 1779866008, now seen corresponding path program 1 times [2025-04-29 11:16:15,320 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-29 11:16:15,320 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1849696252] [2025-04-29 11:16:15,321 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-04-29 11:16:15,321 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-29 11:16:15,333 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 20 statements into 1 equivalence classes. [2025-04-29 11:16:15,353 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 20 of 20 statements. [2025-04-29 11:16:15,356 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-29 11:16:15,356 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-29 11:16:15,662 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2025-04-29 11:16:15,662 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-29 11:16:15,663 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1849696252] [2025-04-29 11:16:15,663 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1849696252] provided 1 perfect and 0 imperfect interpolant sequences [2025-04-29 11:16:15,663 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-04-29 11:16:15,663 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2025-04-29 11:16:15,663 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2144662482] [2025-04-29 11:16:15,663 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-04-29 11:16:15,663 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2025-04-29 11:16:15,663 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-29 11:16:15,664 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2025-04-29 11:16:15,664 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2025-04-29 11:16:15,921 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 33 out of 73 [2025-04-29 11:16:15,922 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 90 places, 73 transitions, 252 flow. Second operand has 7 states, 7 states have (on average 34.57142857142857) internal successors, (242), 7 states have internal predecessors, (242), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-29 11:16:15,922 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-29 11:16:15,922 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 33 of 73 [2025-04-29 11:16:15,922 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-29 11:16:16,047 INFO L116 PetriNetUnfolderBase]: 65/269 cut-off events. [2025-04-29 11:16:16,048 INFO L117 PetriNetUnfolderBase]: For 71/71 co-relation queries the response was YES. [2025-04-29 11:16:16,048 INFO L83 FinitePrefix]: Finished finitePrefix Result has 515 conditions, 269 events. 65/269 cut-off events. For 71/71 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 1209 event pairs, 63 based on Foata normal form. 2/227 useless extension candidates. Maximal degree in co-relation 462. Up to 160 conditions per place. [2025-04-29 11:16:16,049 INFO L140 encePairwiseOnDemand]: 65/73 looper letters, 34 selfloop transitions, 11 changer transitions 0/71 dead transitions. [2025-04-29 11:16:16,049 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 94 places, 71 transitions, 338 flow [2025-04-29 11:16:16,049 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2025-04-29 11:16:16,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2025-04-29 11:16:16,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 263 transitions. [2025-04-29 11:16:16,050 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.5146771037181996 [2025-04-29 11:16:16,050 INFO L175 Difference]: Start difference. First operand has 90 places, 73 transitions, 252 flow. Second operand 7 states and 263 transitions. [2025-04-29 11:16:16,051 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 94 places, 71 transitions, 338 flow [2025-04-29 11:16:16,052 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 88 places, 71 transitions, 316 flow, removed 0 selfloop flow, removed 6 redundant places. [2025-04-29 11:16:16,052 INFO L231 Difference]: Finished difference. Result has 88 places, 71 transitions, 248 flow [2025-04-29 11:16:16,052 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=73, PETRI_DIFFERENCE_MINUEND_FLOW=226, PETRI_DIFFERENCE_MINUEND_PLACES=82, 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=248, PETRI_PLACES=88, PETRI_TRANSITIONS=71} [2025-04-29 11:16:16,053 INFO L279 CegarLoopForPetriNet]: 74 programPoint places, 14 predicate places. [2025-04-29 11:16:16,053 INFO L485 AbstractCegarLoop]: Abstraction has has 88 places, 71 transitions, 248 flow [2025-04-29 11:16:16,053 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 34.57142857142857) internal successors, (242), 7 states have internal predecessors, (242), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-29 11:16:16,053 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-29 11:16:16,053 INFO L206 CegarLoopForPetriNet]: trace histogram [10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-29 11:16:16,053 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2025-04-29 11:16:16,054 INFO L403 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr16REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 47 more)] === [2025-04-29 11:16:16,054 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-29 11:16:16,054 INFO L85 PathProgramCache]: Analyzing trace with hash 1054264892, now seen corresponding path program 1 times [2025-04-29 11:16:16,054 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-29 11:16:16,054 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2058475204] [2025-04-29 11:16:16,054 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-04-29 11:16:16,054 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-29 11:16:16,065 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 22 statements into 1 equivalence classes. [2025-04-29 11:16:16,070 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 22 of 22 statements. [2025-04-29 11:16:16,071 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-29 11:16:16,071 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-29 11:16:16,162 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2025-04-29 11:16:16,162 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-29 11:16:16,162 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2058475204] [2025-04-29 11:16:16,162 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2058475204] provided 1 perfect and 0 imperfect interpolant sequences [2025-04-29 11:16:16,162 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-04-29 11:16:16,162 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2025-04-29 11:16:16,162 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1403547444] [2025-04-29 11:16:16,162 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-04-29 11:16:16,162 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-04-29 11:16:16,162 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-29 11:16:16,163 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-04-29 11:16:16,163 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2025-04-29 11:16:16,266 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 38 out of 73 [2025-04-29 11:16:16,266 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 88 places, 71 transitions, 248 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) [2025-04-29 11:16:16,267 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-29 11:16:16,267 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 38 of 73 [2025-04-29 11:16:16,267 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-29 11:16:16,348 INFO L116 PetriNetUnfolderBase]: 65/267 cut-off events. [2025-04-29 11:16:16,349 INFO L117 PetriNetUnfolderBase]: For 71/71 co-relation queries the response was YES. [2025-04-29 11:16:16,349 INFO L83 FinitePrefix]: Finished finitePrefix Result has 513 conditions, 267 events. 65/267 cut-off events. For 71/71 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 1200 event pairs, 63 based on Foata normal form. 2/227 useless extension candidates. Maximal degree in co-relation 460. Up to 162 conditions per place. [2025-04-29 11:16:16,350 INFO L140 encePairwiseOnDemand]: 66/73 looper letters, 34 selfloop transitions, 11 changer transitions 0/70 dead transitions. [2025-04-29 11:16:16,350 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 91 places, 70 transitions, 336 flow [2025-04-29 11:16:16,350 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-04-29 11:16:16,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2025-04-29 11:16:16,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 221 transitions. [2025-04-29 11:16:16,352 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.6054794520547945 [2025-04-29 11:16:16,352 INFO L175 Difference]: Start difference. First operand has 88 places, 71 transitions, 248 flow. Second operand 5 states and 221 transitions. [2025-04-29 11:16:16,352 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 91 places, 70 transitions, 336 flow [2025-04-29 11:16:16,353 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 85 places, 70 transitions, 314 flow, removed 0 selfloop flow, removed 6 redundant places. [2025-04-29 11:16:16,355 INFO L231 Difference]: Finished difference. Result has 85 places, 70 transitions, 246 flow [2025-04-29 11:16:16,355 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=73, PETRI_DIFFERENCE_MINUEND_FLOW=224, PETRI_DIFFERENCE_MINUEND_PLACES=81, 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=246, PETRI_PLACES=85, PETRI_TRANSITIONS=70} [2025-04-29 11:16:16,355 INFO L279 CegarLoopForPetriNet]: 74 programPoint places, 11 predicate places. [2025-04-29 11:16:16,356 INFO L485 AbstractCegarLoop]: Abstraction has has 85 places, 70 transitions, 246 flow [2025-04-29 11:16:16,356 INFO L486 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) [2025-04-29 11:16:16,357 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-29 11:16:16,357 INFO L206 CegarLoopForPetriNet]: trace histogram [10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-29 11:16:16,357 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2025-04-29 11:16:16,357 INFO L403 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr17REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 47 more)] === [2025-04-29 11:16:16,357 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-29 11:16:16,357 INFO L85 PathProgramCache]: Analyzing trace with hash 1054264893, now seen corresponding path program 1 times [2025-04-29 11:16:16,357 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-29 11:16:16,357 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [116770426] [2025-04-29 11:16:16,357 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-04-29 11:16:16,357 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-29 11:16:16,368 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 22 statements into 1 equivalence classes. [2025-04-29 11:16:16,376 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 22 of 22 statements. [2025-04-29 11:16:16,377 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-29 11:16:16,378 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-29 11:16:16,517 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2025-04-29 11:16:16,517 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-29 11:16:16,517 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [116770426] [2025-04-29 11:16:16,517 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [116770426] provided 1 perfect and 0 imperfect interpolant sequences [2025-04-29 11:16:16,517 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-04-29 11:16:16,517 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2025-04-29 11:16:16,517 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [983982482] [2025-04-29 11:16:16,517 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-04-29 11:16:16,518 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-04-29 11:16:16,518 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-29 11:16:16,518 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-04-29 11:16:16,518 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2025-04-29 11:16:16,599 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 40 out of 73 [2025-04-29 11:16:16,600 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 85 places, 70 transitions, 246 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) [2025-04-29 11:16:16,600 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-29 11:16:16,600 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 40 of 73 [2025-04-29 11:16:16,600 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-29 11:16:16,701 INFO L116 PetriNetUnfolderBase]: 65/265 cut-off events. [2025-04-29 11:16:16,701 INFO L117 PetriNetUnfolderBase]: For 81/81 co-relation queries the response was YES. [2025-04-29 11:16:16,702 INFO L83 FinitePrefix]: Finished finitePrefix Result has 507 conditions, 265 events. 65/265 cut-off events. For 81/81 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 1190 event pairs, 63 based on Foata normal form. 2/225 useless extension candidates. Maximal degree in co-relation 454. Up to 162 conditions per place. [2025-04-29 11:16:16,703 INFO L140 encePairwiseOnDemand]: 66/73 looper letters, 32 selfloop transitions, 11 changer transitions 0/69 dead transitions. [2025-04-29 11:16:16,703 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 88 places, 69 transitions, 330 flow [2025-04-29 11:16:16,704 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-04-29 11:16:16,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2025-04-29 11:16:16,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 229 transitions. [2025-04-29 11:16:16,705 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.6273972602739726 [2025-04-29 11:16:16,705 INFO L175 Difference]: Start difference. First operand has 85 places, 70 transitions, 246 flow. Second operand 5 states and 229 transitions. [2025-04-29 11:16:16,705 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 88 places, 69 transitions, 330 flow [2025-04-29 11:16:16,707 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 84 places, 69 transitions, 308 flow, removed 0 selfloop flow, removed 4 redundant places. [2025-04-29 11:16:16,708 INFO L231 Difference]: Finished difference. Result has 84 places, 69 transitions, 244 flow [2025-04-29 11:16:16,708 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=73, PETRI_DIFFERENCE_MINUEND_FLOW=222, PETRI_DIFFERENCE_MINUEND_PLACES=80, 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=244, PETRI_PLACES=84, PETRI_TRANSITIONS=69} [2025-04-29 11:16:16,709 INFO L279 CegarLoopForPetriNet]: 74 programPoint places, 10 predicate places. [2025-04-29 11:16:16,709 INFO L485 AbstractCegarLoop]: Abstraction has has 84 places, 69 transitions, 244 flow [2025-04-29 11:16:16,710 INFO L486 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) [2025-04-29 11:16:16,710 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-29 11:16:16,710 INFO L206 CegarLoopForPetriNet]: trace histogram [10, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-29 11:16:16,710 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2025-04-29 11:16:16,710 INFO L403 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 47 more)] === [2025-04-29 11:16:16,710 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-29 11:16:16,711 INFO L85 PathProgramCache]: Analyzing trace with hash 1055056418, now seen corresponding path program 1 times [2025-04-29 11:16:16,711 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-29 11:16:16,711 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [602114051] [2025-04-29 11:16:16,711 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-04-29 11:16:16,711 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-29 11:16:16,727 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 26 statements into 1 equivalence classes. [2025-04-29 11:16:16,748 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 26 of 26 statements. [2025-04-29 11:16:16,749 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-29 11:16:16,749 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-29 11:16:17,045 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2025-04-29 11:16:17,045 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-29 11:16:17,045 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [602114051] [2025-04-29 11:16:17,045 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [602114051] provided 0 perfect and 1 imperfect interpolant sequences [2025-04-29 11:16:17,045 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2037246521] [2025-04-29 11:16:17,045 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-04-29 11:16:17,045 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-29 11:16:17,046 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-29 11:16:17,047 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-04-29 11:16:17,049 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2025-04-29 11:16:17,111 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 26 statements into 1 equivalence classes. [2025-04-29 11:16:17,146 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 26 of 26 statements. [2025-04-29 11:16:17,147 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-29 11:16:17,147 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-29 11:16:17,148 INFO L256 TraceCheckSpWp]: Trace formula consists of 405 conjuncts, 33 conjuncts are in the unsatisfiable core [2025-04-29 11:16:17,150 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-29 11:16:17,273 INFO L189 IndexEqualityManager]: detected not equals via solver [2025-04-29 11:16:17,278 INFO L354 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2025-04-29 11:16:17,329 INFO L325 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2025-04-29 11:16:17,329 INFO L354 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 13 [2025-04-29 11:16:17,347 INFO L325 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2025-04-29 11:16:17,347 INFO L354 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2025-04-29 11:16:17,454 INFO L189 IndexEqualityManager]: detected not equals via solver [2025-04-29 11:16:17,455 INFO L354 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2025-04-29 11:16:17,491 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2025-04-29 11:16:17,491 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-04-29 11:16:17,711 INFO L325 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-04-29 11:16:17,712 INFO L354 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 43 treesize of output 61 [2025-04-29 11:16:17,782 INFO L325 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2025-04-29 11:16:17,782 INFO L354 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 12 [2025-04-29 11:16:17,956 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2025-04-29 11:16:17,957 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2037246521] provided 0 perfect and 2 imperfect interpolant sequences [2025-04-29 11:16:17,957 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-04-29 11:16:17,957 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 5] total 20 [2025-04-29 11:16:17,957 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1558959305] [2025-04-29 11:16:17,957 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-04-29 11:16:17,957 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2025-04-29 11:16:17,958 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-29 11:16:17,958 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2025-04-29 11:16:17,958 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=349, Unknown=0, NotChecked=0, Total=462 [2025-04-29 11:16:19,640 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 34 out of 73 [2025-04-29 11:16:19,641 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 84 places, 69 transitions, 244 flow. Second operand has 22 states, 22 states have (on average 35.77272727272727) internal successors, (787), 22 states have internal predecessors, (787), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-29 11:16:19,641 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-29 11:16:19,642 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 34 of 73 [2025-04-29 11:16:19,642 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-29 11:16:19,939 INFO L116 PetriNetUnfolderBase]: 75/302 cut-off events. [2025-04-29 11:16:19,939 INFO L117 PetriNetUnfolderBase]: For 90/90 co-relation queries the response was YES. [2025-04-29 11:16:19,940 INFO L83 FinitePrefix]: Finished finitePrefix Result has 584 conditions, 302 events. 75/302 cut-off events. For 90/90 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 1335 event pairs, 72 based on Foata normal form. 5/262 useless extension candidates. Maximal degree in co-relation 531. Up to 176 conditions per place. [2025-04-29 11:16:19,941 INFO L140 encePairwiseOnDemand]: 63/73 looper letters, 43 selfloop transitions, 12 changer transitions 0/78 dead transitions. [2025-04-29 11:16:19,941 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 90 places, 78 transitions, 398 flow [2025-04-29 11:16:19,941 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2025-04-29 11:16:19,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2025-04-29 11:16:19,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 356 transitions. [2025-04-29 11:16:19,943 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.5418569254185692 [2025-04-29 11:16:19,943 INFO L175 Difference]: Start difference. First operand has 84 places, 69 transitions, 244 flow. Second operand 9 states and 356 transitions. [2025-04-29 11:16:19,943 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 90 places, 78 transitions, 398 flow [2025-04-29 11:16:19,944 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 86 places, 78 transitions, 360 flow, removed 0 selfloop flow, removed 4 redundant places. [2025-04-29 11:16:19,945 INFO L231 Difference]: Finished difference. Result has 87 places, 70 transitions, 255 flow [2025-04-29 11:16:19,945 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=73, PETRI_DIFFERENCE_MINUEND_FLOW=214, PETRI_DIFFERENCE_MINUEND_PLACES=78, 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=9, PETRI_FLOW=255, PETRI_PLACES=87, PETRI_TRANSITIONS=70} [2025-04-29 11:16:19,945 INFO L279 CegarLoopForPetriNet]: 74 programPoint places, 13 predicate places. [2025-04-29 11:16:19,945 INFO L485 AbstractCegarLoop]: Abstraction has has 87 places, 70 transitions, 255 flow [2025-04-29 11:16:19,946 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 35.77272727272727) internal successors, (787), 22 states have internal predecessors, (787), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-29 11:16:19,946 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-29 11:16:19,946 INFO L206 CegarLoopForPetriNet]: trace histogram [10, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-29 11:16:19,952 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2025-04-29 11:16:20,146 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-29 11:16:20,146 INFO L403 AbstractCegarLoop]: === Iteration 12 === Targeting t_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 47 more)] === [2025-04-29 11:16:20,147 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-29 11:16:20,147 INFO L85 PathProgramCache]: Analyzing trace with hash 497200587, now seen corresponding path program 1 times [2025-04-29 11:16:20,147 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-29 11:16:20,147 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [838119251] [2025-04-29 11:16:20,147 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-04-29 11:16:20,147 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-29 11:16:20,171 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 38 statements into 1 equivalence classes. [2025-04-29 11:16:20,185 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 38 of 38 statements. [2025-04-29 11:16:20,185 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-29 11:16:20,185 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-29 11:16:20,266 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 67 trivial. 0 not checked. [2025-04-29 11:16:20,267 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-29 11:16:20,267 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [838119251] [2025-04-29 11:16:20,267 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [838119251] provided 1 perfect and 0 imperfect interpolant sequences [2025-04-29 11:16:20,267 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-04-29 11:16:20,267 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2025-04-29 11:16:20,267 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [456474057] [2025-04-29 11:16:20,267 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-04-29 11:16:20,267 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2025-04-29 11:16:20,267 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-29 11:16:20,268 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2025-04-29 11:16:20,268 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-04-29 11:16:20,297 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 42 out of 73 [2025-04-29 11:16:20,298 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 87 places, 70 transitions, 255 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) [2025-04-29 11:16:20,298 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-29 11:16:20,298 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 42 of 73 [2025-04-29 11:16:20,298 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-29 11:16:20,369 INFO L116 PetriNetUnfolderBase]: 73/285 cut-off events. [2025-04-29 11:16:20,369 INFO L117 PetriNetUnfolderBase]: For 95/95 co-relation queries the response was YES. [2025-04-29 11:16:20,370 INFO L83 FinitePrefix]: Finished finitePrefix Result has 561 conditions, 285 events. 73/285 cut-off events. For 95/95 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 1205 event pairs, 56 based on Foata normal form. 0/254 useless extension candidates. Maximal degree in co-relation 506. Up to 166 conditions per place. [2025-04-29 11:16:20,371 INFO L140 encePairwiseOnDemand]: 69/73 looper letters, 52 selfloop transitions, 2 changer transitions 0/75 dead transitions. [2025-04-29 11:16:20,371 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 87 places, 75 transitions, 373 flow [2025-04-29 11:16:20,371 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-04-29 11:16:20,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2025-04-29 11:16:20,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 164 transitions. [2025-04-29 11:16:20,372 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.7488584474885844 [2025-04-29 11:16:20,372 INFO L175 Difference]: Start difference. First operand has 87 places, 70 transitions, 255 flow. Second operand 3 states and 164 transitions. [2025-04-29 11:16:20,372 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 87 places, 75 transitions, 373 flow [2025-04-29 11:16:20,373 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 83 places, 75 transitions, 354 flow, removed 2 selfloop flow, removed 4 redundant places. [2025-04-29 11:16:20,374 INFO L231 Difference]: Finished difference. Result has 83 places, 68 transitions, 236 flow [2025-04-29 11:16:20,374 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=73, PETRI_DIFFERENCE_MINUEND_FLOW=232, PETRI_DIFFERENCE_MINUEND_PLACES=81, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=68, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=236, PETRI_PLACES=83, PETRI_TRANSITIONS=68} [2025-04-29 11:16:20,376 INFO L279 CegarLoopForPetriNet]: 74 programPoint places, 9 predicate places. [2025-04-29 11:16:20,376 INFO L485 AbstractCegarLoop]: Abstraction has has 83 places, 68 transitions, 236 flow [2025-04-29 11:16:20,376 INFO L486 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) [2025-04-29 11:16:20,376 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-29 11:16:20,376 INFO L206 CegarLoopForPetriNet]: trace histogram [10, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-29 11:16:20,376 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2025-04-29 11:16:20,376 INFO L403 AbstractCegarLoop]: === Iteration 13 === Targeting t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 47 more)] === [2025-04-29 11:16:20,377 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-29 11:16:20,377 INFO L85 PathProgramCache]: Analyzing trace with hash 497200588, now seen corresponding path program 1 times [2025-04-29 11:16:20,377 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-29 11:16:20,377 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [381824531] [2025-04-29 11:16:20,377 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-04-29 11:16:20,378 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-29 11:16:20,395 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 38 statements into 1 equivalence classes. [2025-04-29 11:16:20,405 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 38 of 38 statements. [2025-04-29 11:16:20,405 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-29 11:16:20,405 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-29 11:16:20,481 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2025-04-29 11:16:20,482 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-29 11:16:20,482 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [381824531] [2025-04-29 11:16:20,482 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [381824531] provided 0 perfect and 1 imperfect interpolant sequences [2025-04-29 11:16:20,482 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1046337942] [2025-04-29 11:16:20,482 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-04-29 11:16:20,482 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-29 11:16:20,482 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-29 11:16:20,484 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-04-29 11:16:20,486 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2025-04-29 11:16:20,565 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 38 statements into 1 equivalence classes. [2025-04-29 11:16:20,615 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 38 of 38 statements. [2025-04-29 11:16:20,615 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-29 11:16:20,615 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-29 11:16:20,618 INFO L256 TraceCheckSpWp]: Trace formula consists of 589 conjuncts, 4 conjuncts are in the unsatisfiable core [2025-04-29 11:16:20,621 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-29 11:16:20,645 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2025-04-29 11:16:20,645 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-04-29 11:16:20,683 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2025-04-29 11:16:20,684 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1046337942] provided 0 perfect and 2 imperfect interpolant sequences [2025-04-29 11:16:20,684 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-04-29 11:16:20,684 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 9 [2025-04-29 11:16:20,684 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1932827257] [2025-04-29 11:16:20,684 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-04-29 11:16:20,684 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2025-04-29 11:16:20,684 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-29 11:16:20,684 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2025-04-29 11:16:20,684 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2025-04-29 11:16:20,694 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 45 out of 73 [2025-04-29 11:16:20,694 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 83 places, 68 transitions, 236 flow. Second operand has 9 states, 9 states have (on average 50.111111111111114) internal successors, (451), 9 states have internal predecessors, (451), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-29 11:16:20,694 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-29 11:16:20,694 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 45 of 73 [2025-04-29 11:16:20,694 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-29 11:16:20,837 INFO L116 PetriNetUnfolderBase]: 65/296 cut-off events. [2025-04-29 11:16:20,837 INFO L117 PetriNetUnfolderBase]: For 114/114 co-relation queries the response was YES. [2025-04-29 11:16:20,837 INFO L83 FinitePrefix]: Finished finitePrefix Result has 603 conditions, 296 events. 65/296 cut-off events. For 114/114 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 1039 event pairs, 63 based on Foata normal form. 1/262 useless extension candidates. Maximal degree in co-relation 549. Up to 158 conditions per place. [2025-04-29 11:16:20,838 INFO L140 encePairwiseOnDemand]: 69/73 looper letters, 66 selfloop transitions, 8 changer transitions 0/96 dead transitions. [2025-04-29 11:16:20,838 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 90 places, 96 transitions, 489 flow [2025-04-29 11:16:20,839 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2025-04-29 11:16:20,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2025-04-29 11:16:20,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 428 transitions. [2025-04-29 11:16:20,840 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.7328767123287672 [2025-04-29 11:16:20,840 INFO L175 Difference]: Start difference. First operand has 83 places, 68 transitions, 236 flow. Second operand 8 states and 428 transitions. [2025-04-29 11:16:20,840 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 90 places, 96 transitions, 489 flow [2025-04-29 11:16:20,841 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 88 places, 96 transitions, 485 flow, removed 0 selfloop flow, removed 2 redundant places. [2025-04-29 11:16:20,842 INFO L231 Difference]: Finished difference. Result has 92 places, 71 transitions, 287 flow [2025-04-29 11:16:20,842 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=73, PETRI_DIFFERENCE_MINUEND_FLOW=227, PETRI_DIFFERENCE_MINUEND_PLACES=81, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=67, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=287, PETRI_PLACES=92, PETRI_TRANSITIONS=71} [2025-04-29 11:16:20,844 INFO L279 CegarLoopForPetriNet]: 74 programPoint places, 18 predicate places. [2025-04-29 11:16:20,844 INFO L485 AbstractCegarLoop]: Abstraction has has 92 places, 71 transitions, 287 flow [2025-04-29 11:16:20,844 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 50.111111111111114) internal successors, (451), 9 states have internal predecessors, (451), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-29 11:16:20,844 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-29 11:16:20,845 INFO L206 CegarLoopForPetriNet]: trace histogram [10, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-29 11:16:20,852 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2025-04-29 11:16:21,045 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-29 11:16:21,045 INFO L403 AbstractCegarLoop]: === Iteration 14 === Targeting t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 47 more)] === [2025-04-29 11:16:21,046 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-29 11:16:21,046 INFO L85 PathProgramCache]: Analyzing trace with hash -1210580936, now seen corresponding path program 2 times [2025-04-29 11:16:21,046 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-29 11:16:21,046 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [845771194] [2025-04-29 11:16:21,046 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-04-29 11:16:21,046 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-29 11:16:21,080 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 78 statements into 2 equivalence classes. [2025-04-29 11:16:21,082 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) and asserted 8 of 78 statements. [2025-04-29 11:16:21,082 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2025-04-29 11:16:21,082 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-29 11:16:21,116 INFO L134 CoverageAnalysis]: Checked inductivity of 211 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 211 trivial. 0 not checked. [2025-04-29 11:16:21,116 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-29 11:16:21,116 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [845771194] [2025-04-29 11:16:21,116 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [845771194] provided 1 perfect and 0 imperfect interpolant sequences [2025-04-29 11:16:21,116 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-04-29 11:16:21,116 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2025-04-29 11:16:21,117 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1056374345] [2025-04-29 11:16:21,117 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-04-29 11:16:21,117 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2025-04-29 11:16:21,117 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-29 11:16:21,117 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2025-04-29 11:16:21,117 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-04-29 11:16:21,147 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 43 out of 73 [2025-04-29 11:16:21,148 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 92 places, 71 transitions, 287 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) [2025-04-29 11:16:21,148 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-29 11:16:21,148 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 43 of 73 [2025-04-29 11:16:21,148 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-29 11:16:21,226 INFO L116 PetriNetUnfolderBase]: 65/291 cut-off events. [2025-04-29 11:16:21,226 INFO L117 PetriNetUnfolderBase]: For 153/153 co-relation queries the response was YES. [2025-04-29 11:16:21,226 INFO L83 FinitePrefix]: Finished finitePrefix Result has 604 conditions, 291 events. 65/291 cut-off events. For 153/153 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 989 event pairs, 56 based on Foata normal form. 8/270 useless extension candidates. Maximal degree in co-relation 547. Up to 186 conditions per place. [2025-04-29 11:16:21,229 INFO L140 encePairwiseOnDemand]: 69/73 looper letters, 54 selfloop transitions, 2 changer transitions 0/76 dead transitions. [2025-04-29 11:16:21,230 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 92 places, 76 transitions, 409 flow [2025-04-29 11:16:21,230 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-04-29 11:16:21,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2025-04-29 11:16:21,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 166 transitions. [2025-04-29 11:16:21,230 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.7579908675799086 [2025-04-29 11:16:21,230 INFO L175 Difference]: Start difference. First operand has 92 places, 71 transitions, 287 flow. Second operand 3 states and 166 transitions. [2025-04-29 11:16:21,230 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 92 places, 76 transitions, 409 flow [2025-04-29 11:16:21,231 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 90 places, 76 transitions, 405 flow, removed 0 selfloop flow, removed 2 redundant places. [2025-04-29 11:16:21,232 INFO L231 Difference]: Finished difference. Result has 90 places, 69 transitions, 283 flow [2025-04-29 11:16:21,232 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=73, PETRI_DIFFERENCE_MINUEND_FLOW=279, PETRI_DIFFERENCE_MINUEND_PLACES=88, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=283, PETRI_PLACES=90, PETRI_TRANSITIONS=69} [2025-04-29 11:16:21,233 INFO L279 CegarLoopForPetriNet]: 74 programPoint places, 16 predicate places. [2025-04-29 11:16:21,233 INFO L485 AbstractCegarLoop]: Abstraction has has 90 places, 69 transitions, 283 flow [2025-04-29 11:16:21,233 INFO L486 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) [2025-04-29 11:16:21,233 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-29 11:16:21,233 INFO L206 CegarLoopForPetriNet]: trace histogram [10, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-29 11:16:21,233 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2025-04-29 11:16:21,233 INFO L403 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr19REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 47 more)] === [2025-04-29 11:16:21,233 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-29 11:16:21,233 INFO L85 PathProgramCache]: Analyzing trace with hash -1211567876, now seen corresponding path program 1 times [2025-04-29 11:16:21,234 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-29 11:16:21,234 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1815211818] [2025-04-29 11:16:21,234 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-04-29 11:16:21,234 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-29 11:16:21,274 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 78 statements into 1 equivalence classes. [2025-04-29 11:16:21,298 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 78 of 78 statements. [2025-04-29 11:16:21,301 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-29 11:16:21,302 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-29 11:16:21,483 INFO L134 CoverageAnalysis]: Checked inductivity of 211 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2025-04-29 11:16:21,484 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-29 11:16:21,484 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1815211818] [2025-04-29 11:16:21,484 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1815211818] provided 0 perfect and 1 imperfect interpolant sequences [2025-04-29 11:16:21,484 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1365851607] [2025-04-29 11:16:21,484 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-04-29 11:16:21,484 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-29 11:16:21,484 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-29 11:16:21,486 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-04-29 11:16:21,488 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2025-04-29 11:16:21,659 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 78 statements into 1 equivalence classes. [2025-04-29 11:16:21,765 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 78 of 78 statements. [2025-04-29 11:16:21,765 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-29 11:16:21,765 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-29 11:16:21,770 INFO L256 TraceCheckSpWp]: Trace formula consists of 1348 conjuncts, 8 conjuncts are in the unsatisfiable core [2025-04-29 11:16:21,772 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-29 11:16:21,842 INFO L134 CoverageAnalysis]: Checked inductivity of 211 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2025-04-29 11:16:21,842 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-04-29 11:16:21,932 INFO L134 CoverageAnalysis]: Checked inductivity of 211 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2025-04-29 11:16:21,933 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1365851607] provided 0 perfect and 2 imperfect interpolant sequences [2025-04-29 11:16:21,933 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-04-29 11:16:21,933 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 13 [2025-04-29 11:16:21,933 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1023505896] [2025-04-29 11:16:21,933 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-04-29 11:16:21,934 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2025-04-29 11:16:21,934 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-29 11:16:21,934 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2025-04-29 11:16:21,934 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2025-04-29 11:16:21,950 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 45 out of 73 [2025-04-29 11:16:21,951 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 90 places, 69 transitions, 283 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) [2025-04-29 11:16:21,951 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-29 11:16:21,951 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 45 of 73 [2025-04-29 11:16:21,951 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-29 11:16:22,119 INFO L116 PetriNetUnfolderBase]: 65/328 cut-off events. [2025-04-29 11:16:22,120 INFO L117 PetriNetUnfolderBase]: For 234/234 co-relation queries the response was YES. [2025-04-29 11:16:22,121 INFO L83 FinitePrefix]: Finished finitePrefix Result has 728 conditions, 328 events. 65/328 cut-off events. For 234/234 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 965 event pairs, 63 based on Foata normal form. 4/302 useless extension candidates. Maximal degree in co-relation 670. Up to 158 conditions per place. [2025-04-29 11:16:22,122 INFO L140 encePairwiseOnDemand]: 69/73 looper letters, 90 selfloop transitions, 12 changer transitions 0/122 dead transitions. [2025-04-29 11:16:22,122 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 101 places, 122 transitions, 719 flow [2025-04-29 11:16:22,122 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2025-04-29 11:16:22,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2025-04-29 11:16:22,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 636 transitions. [2025-04-29 11:16:22,123 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.726027397260274 [2025-04-29 11:16:22,123 INFO L175 Difference]: Start difference. First operand has 90 places, 69 transitions, 283 flow. Second operand 12 states and 636 transitions. [2025-04-29 11:16:22,123 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 101 places, 122 transitions, 719 flow [2025-04-29 11:16:22,125 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 99 places, 122 transitions, 715 flow, removed 0 selfloop flow, removed 2 redundant places. [2025-04-29 11:16:22,127 INFO L231 Difference]: Finished difference. Result has 104 places, 74 transitions, 378 flow [2025-04-29 11:16:22,127 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=73, PETRI_DIFFERENCE_MINUEND_FLOW=279, PETRI_DIFFERENCE_MINUEND_PLACES=88, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=378, PETRI_PLACES=104, PETRI_TRANSITIONS=74} [2025-04-29 11:16:22,127 INFO L279 CegarLoopForPetriNet]: 74 programPoint places, 30 predicate places. [2025-04-29 11:16:22,127 INFO L485 AbstractCegarLoop]: Abstraction has has 104 places, 74 transitions, 378 flow [2025-04-29 11:16:22,128 INFO L486 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) [2025-04-29 11:16:22,128 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-29 11:16:22,128 INFO L206 CegarLoopForPetriNet]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-29 11:16:22,136 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2025-04-29 11:16:22,328 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2025-04-29 11:16:22,328 INFO L403 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr19REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 47 more)] === [2025-04-29 11:16:22,329 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-29 11:16:22,329 INFO L85 PathProgramCache]: Analyzing trace with hash -631871640, now seen corresponding path program 2 times [2025-04-29 11:16:22,329 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-29 11:16:22,329 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [865295152] [2025-04-29 11:16:22,329 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-04-29 11:16:22,329 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-29 11:16:22,387 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 118 statements into 2 equivalence classes. [2025-04-29 11:16:22,437 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 118 of 118 statements. [2025-04-29 11:16:22,439 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-04-29 11:16:22,440 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-29 11:16:23,033 INFO L134 CoverageAnalysis]: Checked inductivity of 515 backedges. 336 proven. 124 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2025-04-29 11:16:23,033 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-29 11:16:23,033 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [865295152] [2025-04-29 11:16:23,033 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [865295152] provided 0 perfect and 1 imperfect interpolant sequences [2025-04-29 11:16:23,033 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [562774975] [2025-04-29 11:16:23,033 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-04-29 11:16:23,034 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-29 11:16:23,034 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-29 11:16:23,035 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) [2025-04-29 11:16:23,037 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2025-04-29 11:16:23,257 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 118 statements into 2 equivalence classes. [2025-04-29 11:16:23,438 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 118 of 118 statements. [2025-04-29 11:16:23,438 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-04-29 11:16:23,438 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-29 11:16:23,444 INFO L256 TraceCheckSpWp]: Trace formula consists of 2128 conjuncts, 14 conjuncts are in the unsatisfiable core [2025-04-29 11:16:23,448 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-29 11:16:24,115 INFO L134 CoverageAnalysis]: Checked inductivity of 515 backedges. 423 proven. 37 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2025-04-29 11:16:24,116 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-04-29 11:16:24,143 INFO L354 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 25 [2025-04-29 11:16:24,454 INFO L134 CoverageAnalysis]: Checked inductivity of 515 backedges. 423 proven. 37 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2025-04-29 11:16:24,454 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [562774975] provided 0 perfect and 2 imperfect interpolant sequences [2025-04-29 11:16:24,454 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-04-29 11:16:24,454 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 24 [2025-04-29 11:16:24,455 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [807149834] [2025-04-29 11:16:24,455 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-04-29 11:16:24,455 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2025-04-29 11:16:24,455 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-29 11:16:24,456 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2025-04-29 11:16:24,456 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=207, Invalid=443, Unknown=0, NotChecked=0, Total=650 [2025-04-29 11:16:24,754 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 43 out of 73 [2025-04-29 11:16:24,755 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 104 places, 74 transitions, 378 flow. Second operand has 26 states, 26 states have (on average 49.23076923076923) internal successors, (1280), 26 states have internal predecessors, (1280), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-29 11:16:24,755 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-29 11:16:24,755 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 43 of 73 [2025-04-29 11:16:24,755 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-29 11:16:25,156 INFO L116 PetriNetUnfolderBase]: 110/487 cut-off events. [2025-04-29 11:16:25,156 INFO L117 PetriNetUnfolderBase]: For 325/325 co-relation queries the response was YES. [2025-04-29 11:16:25,157 INFO L83 FinitePrefix]: Finished finitePrefix Result has 998 conditions, 487 events. 110/487 cut-off events. For 325/325 co-relation queries the response was YES. Maximal size of possible extension queue 32. Compared 2155 event pairs, 26 based on Foata normal form. 0/424 useless extension candidates. Maximal degree in co-relation 936. Up to 149 conditions per place. [2025-04-29 11:16:25,158 INFO L140 encePairwiseOnDemand]: 63/73 looper letters, 108 selfloop transitions, 18 changer transitions 0/144 dead transitions. [2025-04-29 11:16:25,158 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 119 places, 144 transitions, 859 flow [2025-04-29 11:16:25,159 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2025-04-29 11:16:25,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2025-04-29 11:16:25,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 805 transitions. [2025-04-29 11:16:25,160 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.6892123287671232 [2025-04-29 11:16:25,160 INFO L175 Difference]: Start difference. First operand has 104 places, 74 transitions, 378 flow. Second operand 16 states and 805 transitions. [2025-04-29 11:16:25,160 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 119 places, 144 transitions, 859 flow [2025-04-29 11:16:25,163 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 114 places, 144 transitions, 849 flow, removed 0 selfloop flow, removed 5 redundant places. [2025-04-29 11:16:25,164 INFO L231 Difference]: Finished difference. Result has 117 places, 79 transitions, 438 flow [2025-04-29 11:16:25,164 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=73, PETRI_DIFFERENCE_MINUEND_FLOW=368, PETRI_DIFFERENCE_MINUEND_PLACES=99, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=74, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=438, PETRI_PLACES=117, PETRI_TRANSITIONS=79} [2025-04-29 11:16:25,165 INFO L279 CegarLoopForPetriNet]: 74 programPoint places, 43 predicate places. [2025-04-29 11:16:25,165 INFO L485 AbstractCegarLoop]: Abstraction has has 117 places, 79 transitions, 438 flow [2025-04-29 11:16:25,165 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 49.23076923076923) internal successors, (1280), 26 states have internal predecessors, (1280), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-29 11:16:25,165 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-29 11:16:25,165 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] [2025-04-29 11:16:25,175 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2025-04-29 11:16:25,366 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2025-04-29 11:16:25,366 INFO L403 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr21REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 47 more)] === [2025-04-29 11:16:25,367 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-29 11:16:25,367 INFO L85 PathProgramCache]: Analyzing trace with hash 1886815986, now seen corresponding path program 1 times [2025-04-29 11:16:25,367 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-29 11:16:25,367 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [506205051] [2025-04-29 11:16:25,367 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-04-29 11:16:25,367 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-29 11:16:25,415 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 119 statements into 1 equivalence classes. [2025-04-29 11:16:26,968 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 119 of 119 statements. [2025-04-29 11:16:26,968 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-29 11:16:26,968 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat Killed by 15