./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/goblint-regression/09-regions_13-arraycollapse_nr.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 6497de01 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_261b9b49-e0d7-4940-9b4b-0f55924bb174/bin/uautomizer-verify-LYvppIcaGC/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_261b9b49-e0d7-4940-9b4b-0f55924bb174/bin/uautomizer-verify-LYvppIcaGC/plugins/org.eclipse.equinox.launcher_1.6.800.v20240513-1750.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_261b9b49-e0d7-4940-9b4b-0f55924bb174/bin/uautomizer-verify-LYvppIcaGC/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_261b9b49-e0d7-4940-9b4b-0f55924bb174/bin/uautomizer-verify-LYvppIcaGC/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/goblint-regression/09-regions_13-arraycollapse_nr.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_261b9b49-e0d7-4940-9b4b-0f55924bb174/bin/uautomizer-verify-LYvppIcaGC/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_261b9b49-e0d7-4940-9b4b-0f55924bb174/bin/uautomizer-verify-LYvppIcaGC --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 b018c23c1a90f89310fc4f08bf16b02660af5a398ccd47f63d319e7a234c112b --- Real Ultimate output --- This is Ultimate 0.3.0-dev-6497de0 [2024-11-24 00:43:20,434 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-24 00:43:20,535 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_261b9b49-e0d7-4940-9b4b-0f55924bb174/bin/uautomizer-verify-LYvppIcaGC/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2024-11-24 00:43:20,548 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-24 00:43:20,548 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-24 00:43:20,585 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-24 00:43:20,586 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-24 00:43:20,586 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-24 00:43:20,586 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-24 00:43:20,586 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-24 00:43:20,586 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-24 00:43:20,586 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-24 00:43:20,587 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-24 00:43:20,587 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-24 00:43:20,587 INFO L153 SettingsManager]: * Use SBE=true [2024-11-24 00:43:20,587 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-24 00:43:20,587 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-24 00:43:20,587 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-24 00:43:20,588 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-24 00:43:20,588 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-24 00:43:20,588 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2024-11-24 00:43:20,588 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2024-11-24 00:43:20,588 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2024-11-24 00:43:20,588 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-24 00:43:20,588 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-11-24 00:43:20,588 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2024-11-24 00:43:20,588 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-24 00:43:20,588 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2024-11-24 00:43:20,588 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-24 00:43:20,589 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2024-11-24 00:43:20,589 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-24 00:43:20,590 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-24 00:43:20,590 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-24 00:43:20,590 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-24 00:43:20,590 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-24 00:43:20,590 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-24 00:43:20,590 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-24 00:43:20,590 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-24 00:43:20,590 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-24 00:43:20,591 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-24 00:43:20,591 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-24 00:43:20,591 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-24 00:43:20,591 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-24 00:43:20,591 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-24 00:43:20,591 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-24 00:43:20,592 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-24 00:43:20,592 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-24 00:43:20,592 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 -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_261b9b49-e0d7-4940-9b4b-0f55924bb174/bin/uautomizer-verify-LYvppIcaGC 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 -> b018c23c1a90f89310fc4f08bf16b02660af5a398ccd47f63d319e7a234c112b [2024-11-24 00:43:20,926 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-24 00:43:20,940 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-24 00:43:20,942 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-24 00:43:20,945 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-24 00:43:20,945 INFO L274 PluginConnector]: CDTParser initialized [2024-11-24 00:43:20,947 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_261b9b49-e0d7-4940-9b4b-0f55924bb174/bin/uautomizer-verify-LYvppIcaGC/../../sv-benchmarks/c/goblint-regression/09-regions_13-arraycollapse_nr.i [2024-11-24 00:43:24,083 INFO L533 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_261b9b49-e0d7-4940-9b4b-0f55924bb174/bin/uautomizer-verify-LYvppIcaGC/data/1b9fc4376/a07493c4fd524e5192899bfaffb967d3/FLAGbe8aff4bb [2024-11-24 00:43:24,470 INFO L384 CDTParser]: Found 1 translation units. [2024-11-24 00:43:24,471 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_261b9b49-e0d7-4940-9b4b-0f55924bb174/sv-benchmarks/c/goblint-regression/09-regions_13-arraycollapse_nr.i [2024-11-24 00:43:24,499 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_261b9b49-e0d7-4940-9b4b-0f55924bb174/bin/uautomizer-verify-LYvppIcaGC/data/1b9fc4376/a07493c4fd524e5192899bfaffb967d3/FLAGbe8aff4bb [2024-11-24 00:43:24,649 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_261b9b49-e0d7-4940-9b4b-0f55924bb174/bin/uautomizer-verify-LYvppIcaGC/data/1b9fc4376/a07493c4fd524e5192899bfaffb967d3 [2024-11-24 00:43:24,652 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-24 00:43:24,654 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-24 00:43:24,655 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-24 00:43:24,655 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-24 00:43:24,660 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-24 00:43:24,661 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.11 12:43:24" (1/1) ... [2024-11-24 00:43:24,664 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@11cb4749 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 12:43:24, skipping insertion in model container [2024-11-24 00:43:24,664 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.11 12:43:24" (1/1) ... [2024-11-24 00:43:24,716 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-24 00:43:25,303 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-24 00:43:25,336 INFO L200 MainTranslator]: Completed pre-run [2024-11-24 00:43:25,404 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-24 00:43:25,504 INFO L204 MainTranslator]: Completed translation [2024-11-24 00:43:25,505 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 12:43:25 WrapperNode [2024-11-24 00:43:25,505 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-24 00:43:25,506 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-24 00:43:25,507 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-24 00:43:25,507 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-24 00:43:25,513 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 12:43:25" (1/1) ... [2024-11-24 00:43:25,530 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 12:43:25" (1/1) ... [2024-11-24 00:43:25,565 INFO L138 Inliner]: procedures = 372, calls = 95, calls flagged for inlining = 14, calls inlined = 14, statements flattened = 228 [2024-11-24 00:43:25,568 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-24 00:43:25,569 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-24 00:43:25,569 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-24 00:43:25,569 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-24 00:43:25,579 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 12:43:25" (1/1) ... [2024-11-24 00:43:25,579 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 12:43:25" (1/1) ... [2024-11-24 00:43:25,588 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 12:43:25" (1/1) ... [2024-11-24 00:43:25,619 INFO L175 MemorySlicer]: Split 90 memory accesses to 3 slices as follows [50, 16, 24]. 56 percent of accesses are in the largest equivalence class. The 60 initializations are split as follows [50, 10, 0]. The 19 writes are split as follows [0, 1, 18]. [2024-11-24 00:43:25,619 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 12:43:25" (1/1) ... [2024-11-24 00:43:25,620 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 12:43:25" (1/1) ... [2024-11-24 00:43:25,648 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 12:43:25" (1/1) ... [2024-11-24 00:43:25,653 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 12:43:25" (1/1) ... [2024-11-24 00:43:25,659 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 12:43:25" (1/1) ... [2024-11-24 00:43:25,662 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 12:43:25" (1/1) ... [2024-11-24 00:43:25,667 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 12:43:25" (1/1) ... [2024-11-24 00:43:25,675 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-24 00:43:25,676 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-24 00:43:25,676 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-24 00:43:25,676 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-24 00:43:25,677 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 12:43:25" (1/1) ... [2024-11-24 00:43:25,687 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-24 00:43:25,702 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_261b9b49-e0d7-4940-9b4b-0f55924bb174/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-24 00:43:25,720 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_261b9b49-e0d7-4940-9b4b-0f55924bb174/bin/uautomizer-verify-LYvppIcaGC/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-11-24 00:43:25,723 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_261b9b49-e0d7-4940-9b4b-0f55924bb174/bin/uautomizer-verify-LYvppIcaGC/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-11-24 00:43:25,754 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#0 [2024-11-24 00:43:25,755 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#1 [2024-11-24 00:43:25,755 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#2 [2024-11-24 00:43:25,755 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#0 [2024-11-24 00:43:25,755 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#1 [2024-11-24 00:43:25,755 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#2 [2024-11-24 00:43:25,755 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexUnlock [2024-11-24 00:43:25,755 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-11-24 00:43:25,755 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-11-24 00:43:25,755 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2024-11-24 00:43:25,755 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-11-24 00:43:25,755 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-11-24 00:43:25,755 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2024-11-24 00:43:25,755 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2024-11-24 00:43:25,756 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-11-24 00:43:25,756 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-24 00:43:25,756 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#0 [2024-11-24 00:43:25,756 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#1 [2024-11-24 00:43:25,756 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#2 [2024-11-24 00:43:25,756 INFO L130 BoogieDeclarations]: Found specification of procedure t_fun [2024-11-24 00:43:25,756 INFO L138 BoogieDeclarations]: Found implementation of procedure t_fun [2024-11-24 00:43:25,756 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-24 00:43:25,756 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-11-24 00:43:25,756 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-11-24 00:43:25,756 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-24 00:43:25,756 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-24 00:43:25,758 WARN L203 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2024-11-24 00:43:26,017 INFO L234 CfgBuilder]: Building ICFG [2024-11-24 00:43:26,019 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-24 00:43:26,848 INFO L279 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-11-24 00:43:26,848 INFO L283 CfgBuilder]: Performing block encoding [2024-11-24 00:43:27,498 INFO L307 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-24 00:43:27,498 INFO L312 CfgBuilder]: Removed 1 assume(true) statements. [2024-11-24 00:43:27,499 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.11 12:43:27 BoogieIcfgContainer [2024-11-24 00:43:27,499 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-24 00:43:27,502 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-24 00:43:27,502 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-24 00:43:27,507 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-24 00:43:27,508 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.11 12:43:24" (1/3) ... [2024-11-24 00:43:27,509 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@290b3240 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.11 12:43:27, skipping insertion in model container [2024-11-24 00:43:27,509 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 12:43:25" (2/3) ... [2024-11-24 00:43:27,510 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@290b3240 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.11 12:43:27, skipping insertion in model container [2024-11-24 00:43:27,510 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.11 12:43:27" (3/3) ... [2024-11-24 00:43:27,512 INFO L128 eAbstractionObserver]: Analyzing ICFG 09-regions_13-arraycollapse_nr.i [2024-11-24 00:43:27,530 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-24 00:43:27,531 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG 09-regions_13-arraycollapse_nr.i that has 2 procedures, 107 locations, 1 initial locations, 1 loop locations, and 61 error locations. [2024-11-24 00:43:27,532 INFO L491 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-11-24 00:43:27,630 INFO L143 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-11-24 00:43:27,674 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 110 places, 107 transitions, 218 flow [2024-11-24 00:43:27,755 INFO L124 PetriNetUnfolderBase]: 1/106 cut-off events. [2024-11-24 00:43:27,758 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-11-24 00:43:27,761 INFO L83 FinitePrefix]: Finished finitePrefix Result has 110 conditions, 106 events. 1/106 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 336 event pairs, 0 based on Foata normal form. 0/44 useless extension candidates. Maximal degree in co-relation 66. Up to 2 conditions per place. [2024-11-24 00:43:27,762 INFO L82 GeneralOperation]: Start removeDead. Operand has 110 places, 107 transitions, 218 flow [2024-11-24 00:43:27,768 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 109 places, 106 transitions, 215 flow [2024-11-24 00:43:27,784 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-24 00:43:27,806 INFO L333 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=None, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@19ada555, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-24 00:43:27,807 INFO L334 AbstractCegarLoop]: Starting to check reachability of 74 error locations. [2024-11-24 00:43:27,814 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-11-24 00:43:27,816 INFO L124 PetriNetUnfolderBase]: 0/4 cut-off events. [2024-11-24 00:43:27,816 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-11-24 00:43:27,816 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-24 00:43:27,817 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2024-11-24 00:43:27,817 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr18REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 71 more)] === [2024-11-24 00:43:27,823 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-24 00:43:27,824 INFO L85 PathProgramCache]: Analyzing trace with hash 661696, now seen corresponding path program 1 times [2024-11-24 00:43:27,832 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-24 00:43:27,833 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [50795908] [2024-11-24 00:43:27,834 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-24 00:43:27,834 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-24 00:43:28,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-24 00:43:28,333 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-24 00:43:28,333 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-24 00:43:28,334 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [50795908] [2024-11-24 00:43:28,334 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [50795908] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-24 00:43:28,334 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-24 00:43:28,336 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-24 00:43:28,338 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [116210358] [2024-11-24 00:43:28,339 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-24 00:43:28,347 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-24 00:43:28,352 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-24 00:43:28,382 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-24 00:43:28,383 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-24 00:43:28,559 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 61 out of 107 [2024-11-24 00:43:28,562 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 109 places, 106 transitions, 215 flow. Second operand has 3 states, 3 states have (on average 62.0) internal successors, (186), 3 states have internal predecessors, (186), 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) [2024-11-24 00:43:28,563 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-24 00:43:28,563 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 61 of 107 [2024-11-24 00:43:28,564 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-24 00:43:28,836 INFO L124 PetriNetUnfolderBase]: 64/293 cut-off events. [2024-11-24 00:43:28,840 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-11-24 00:43:28,841 INFO L83 FinitePrefix]: Finished finitePrefix Result has 462 conditions, 293 events. 64/293 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 1326 event pairs, 63 based on Foata normal form. 0/226 useless extension candidates. Maximal degree in co-relation 376. Up to 157 conditions per place. [2024-11-24 00:43:28,844 INFO L140 encePairwiseOnDemand]: 91/107 looper letters, 30 selfloop transitions, 8 changer transitions 0/98 dead transitions. [2024-11-24 00:43:28,848 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 103 places, 98 transitions, 275 flow [2024-11-24 00:43:28,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-24 00:43:28,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-24 00:43:28,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 229 transitions. [2024-11-24 00:43:28,873 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.7133956386292835 [2024-11-24 00:43:28,875 INFO L175 Difference]: Start difference. First operand has 109 places, 106 transitions, 215 flow. Second operand 3 states and 229 transitions. [2024-11-24 00:43:28,876 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 103 places, 98 transitions, 275 flow [2024-11-24 00:43:28,882 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 102 places, 98 transitions, 274 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-24 00:43:28,888 INFO L231 Difference]: Finished difference. Result has 102 places, 98 transitions, 214 flow [2024-11-24 00:43:28,890 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=107, PETRI_DIFFERENCE_MINUEND_FLOW=198, PETRI_DIFFERENCE_MINUEND_PLACES=100, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=98, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=90, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=214, PETRI_PLACES=102, PETRI_TRANSITIONS=98} [2024-11-24 00:43:28,896 INFO L279 CegarLoopForPetriNet]: 109 programPoint places, -7 predicate places. [2024-11-24 00:43:28,897 INFO L471 AbstractCegarLoop]: Abstraction has has 102 places, 98 transitions, 214 flow [2024-11-24 00:43:28,897 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 62.0) internal successors, (186), 3 states have internal predecessors, (186), 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) [2024-11-24 00:43:28,898 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-24 00:43:28,898 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2024-11-24 00:43:28,898 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-24 00:43:28,898 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr18REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 71 more)] === [2024-11-24 00:43:28,899 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-24 00:43:28,899 INFO L85 PathProgramCache]: Analyzing trace with hash 661697, now seen corresponding path program 1 times [2024-11-24 00:43:28,900 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-24 00:43:28,900 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1465214727] [2024-11-24 00:43:28,900 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-24 00:43:28,900 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-24 00:43:28,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-24 00:43:29,162 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-24 00:43:29,162 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-24 00:43:29,162 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1465214727] [2024-11-24 00:43:29,162 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1465214727] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-24 00:43:29,162 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-24 00:43:29,162 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-24 00:43:29,163 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2070940040] [2024-11-24 00:43:29,163 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-24 00:43:29,164 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-24 00:43:29,164 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-24 00:43:29,164 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-24 00:43:29,164 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-24 00:43:29,333 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 107 [2024-11-24 00:43:29,333 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 102 places, 98 transitions, 214 flow. Second operand has 3 states, 3 states have (on average 66.0) internal successors, (198), 3 states have internal predecessors, (198), 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) [2024-11-24 00:43:29,333 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-24 00:43:29,334 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 107 [2024-11-24 00:43:29,334 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-24 00:43:29,546 INFO L124 PetriNetUnfolderBase]: 64/285 cut-off events. [2024-11-24 00:43:29,546 INFO L125 PetriNetUnfolderBase]: For 5/5 co-relation queries the response was YES. [2024-11-24 00:43:29,549 INFO L83 FinitePrefix]: Finished finitePrefix Result has 458 conditions, 285 events. 64/285 cut-off events. For 5/5 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 1280 event pairs, 63 based on Foata normal form. 8/226 useless extension candidates. Maximal degree in co-relation 395. Up to 157 conditions per place. [2024-11-24 00:43:29,553 INFO L140 encePairwiseOnDemand]: 91/107 looper letters, 26 selfloop transitions, 8 changer transitions 0/90 dead transitions. [2024-11-24 00:43:29,553 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 96 places, 90 transitions, 266 flow [2024-11-24 00:43:29,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-24 00:43:29,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-24 00:43:29,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 237 transitions. [2024-11-24 00:43:29,555 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.7383177570093458 [2024-11-24 00:43:29,555 INFO L175 Difference]: Start difference. First operand has 102 places, 98 transitions, 214 flow. Second operand 3 states and 237 transitions. [2024-11-24 00:43:29,555 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 96 places, 90 transitions, 266 flow [2024-11-24 00:43:29,556 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 94 places, 90 transitions, 250 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-24 00:43:29,561 INFO L231 Difference]: Finished difference. Result has 94 places, 90 transitions, 198 flow [2024-11-24 00:43:29,561 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=107, PETRI_DIFFERENCE_MINUEND_FLOW=182, PETRI_DIFFERENCE_MINUEND_PLACES=92, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=90, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=82, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=198, PETRI_PLACES=94, PETRI_TRANSITIONS=90} [2024-11-24 00:43:29,562 INFO L279 CegarLoopForPetriNet]: 109 programPoint places, -15 predicate places. [2024-11-24 00:43:29,563 INFO L471 AbstractCegarLoop]: Abstraction has has 94 places, 90 transitions, 198 flow [2024-11-24 00:43:29,563 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 66.0) internal successors, (198), 3 states have internal predecessors, (198), 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) [2024-11-24 00:43:29,563 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-24 00:43:29,564 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2024-11-24 00:43:29,564 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-24 00:43:29,564 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr18REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 71 more)] === [2024-11-24 00:43:29,564 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-24 00:43:29,565 INFO L85 PathProgramCache]: Analyzing trace with hash 635910758, now seen corresponding path program 1 times [2024-11-24 00:43:29,565 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-24 00:43:29,566 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1074245872] [2024-11-24 00:43:29,566 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-24 00:43:29,566 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-24 00:43:29,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-24 00:43:29,919 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-24 00:43:29,919 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-24 00:43:29,920 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1074245872] [2024-11-24 00:43:29,920 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1074245872] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-24 00:43:29,920 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-24 00:43:29,920 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-24 00:43:29,920 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [622162503] [2024-11-24 00:43:29,920 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-24 00:43:29,920 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-24 00:43:29,921 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-24 00:43:29,921 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-24 00:43:29,922 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2024-11-24 00:43:30,303 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 62 out of 107 [2024-11-24 00:43:30,303 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 94 places, 90 transitions, 198 flow. Second operand has 6 states, 6 states have (on average 62.833333333333336) internal successors, (377), 6 states have internal predecessors, (377), 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) [2024-11-24 00:43:30,304 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-24 00:43:30,304 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 62 of 107 [2024-11-24 00:43:30,304 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-24 00:43:30,494 INFO L124 PetriNetUnfolderBase]: 73/305 cut-off events. [2024-11-24 00:43:30,495 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2024-11-24 00:43:30,495 INFO L83 FinitePrefix]: Finished finitePrefix Result has 501 conditions, 305 events. 73/305 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 1383 event pairs, 72 based on Foata normal form. 1/245 useless extension candidates. Maximal degree in co-relation 437. Up to 183 conditions per place. [2024-11-24 00:43:30,500 INFO L140 encePairwiseOnDemand]: 100/107 looper letters, 38 selfloop transitions, 1 changer transitions 0/84 dead transitions. [2024-11-24 00:43:30,502 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 90 places, 84 transitions, 264 flow [2024-11-24 00:43:30,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-24 00:43:30,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-24 00:43:30,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 231 transitions. [2024-11-24 00:43:30,504 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.719626168224299 [2024-11-24 00:43:30,504 INFO L175 Difference]: Start difference. First operand has 94 places, 90 transitions, 198 flow. Second operand 3 states and 231 transitions. [2024-11-24 00:43:30,504 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 90 places, 84 transitions, 264 flow [2024-11-24 00:43:30,505 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 88 places, 84 transitions, 248 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-24 00:43:30,510 INFO L231 Difference]: Finished difference. Result has 88 places, 84 transitions, 172 flow [2024-11-24 00:43:30,511 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=107, PETRI_DIFFERENCE_MINUEND_FLOW=170, PETRI_DIFFERENCE_MINUEND_PLACES=86, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=84, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=83, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=172, PETRI_PLACES=88, PETRI_TRANSITIONS=84} [2024-11-24 00:43:30,513 INFO L279 CegarLoopForPetriNet]: 109 programPoint places, -21 predicate places. [2024-11-24 00:43:30,513 INFO L471 AbstractCegarLoop]: Abstraction has has 88 places, 84 transitions, 172 flow [2024-11-24 00:43:30,514 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 62.833333333333336) internal successors, (377), 6 states have internal predecessors, (377), 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) [2024-11-24 00:43:30,514 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-24 00:43:30,514 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2024-11-24 00:43:30,514 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-11-24 00:43:30,514 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr18REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 71 more)] === [2024-11-24 00:43:30,516 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-24 00:43:30,516 INFO L85 PathProgramCache]: Analyzing trace with hash 635910759, now seen corresponding path program 1 times [2024-11-24 00:43:30,516 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-24 00:43:30,517 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [724648991] [2024-11-24 00:43:30,517 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-24 00:43:30,517 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-24 00:43:30,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-24 00:43:30,858 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-24 00:43:30,858 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-24 00:43:30,858 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [724648991] [2024-11-24 00:43:30,858 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [724648991] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-24 00:43:30,858 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-24 00:43:30,858 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-24 00:43:30,859 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [514282764] [2024-11-24 00:43:30,860 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-24 00:43:30,860 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-24 00:43:30,860 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-24 00:43:30,861 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-24 00:43:30,862 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2024-11-24 00:43:31,224 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 57 out of 107 [2024-11-24 00:43:31,224 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 88 places, 84 transitions, 172 flow. Second operand has 5 states, 5 states have (on average 57.8) internal successors, (289), 5 states have internal predecessors, (289), 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) [2024-11-24 00:43:31,225 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-24 00:43:31,225 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 57 of 107 [2024-11-24 00:43:31,225 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-24 00:43:31,465 INFO L124 PetriNetUnfolderBase]: 64/291 cut-off events. [2024-11-24 00:43:31,465 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-11-24 00:43:31,466 INFO L83 FinitePrefix]: Finished finitePrefix Result has 466 conditions, 291 events. 64/291 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 1210 event pairs, 63 based on Foata normal form. 0/228 useless extension candidates. Maximal degree in co-relation 460. Up to 163 conditions per place. [2024-11-24 00:43:31,468 INFO L140 encePairwiseOnDemand]: 98/107 looper letters, 37 selfloop transitions, 6 changer transitions 0/91 dead transitions. [2024-11-24 00:43:31,468 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 91 places, 91 transitions, 272 flow [2024-11-24 00:43:31,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-24 00:43:31,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-24 00:43:31,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 274 transitions. [2024-11-24 00:43:31,470 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6401869158878505 [2024-11-24 00:43:31,470 INFO L175 Difference]: Start difference. First operand has 88 places, 84 transitions, 172 flow. Second operand 4 states and 274 transitions. [2024-11-24 00:43:31,470 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 91 places, 91 transitions, 272 flow [2024-11-24 00:43:31,472 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 90 places, 91 transitions, 271 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-24 00:43:31,477 INFO L231 Difference]: Finished difference. Result has 92 places, 89 transitions, 219 flow [2024-11-24 00:43:31,477 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=107, PETRI_DIFFERENCE_MINUEND_FLOW=171, PETRI_DIFFERENCE_MINUEND_PLACES=87, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=84, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=78, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=219, PETRI_PLACES=92, PETRI_TRANSITIONS=89} [2024-11-24 00:43:31,478 INFO L279 CegarLoopForPetriNet]: 109 programPoint places, -17 predicate places. [2024-11-24 00:43:31,478 INFO L471 AbstractCegarLoop]: Abstraction has has 92 places, 89 transitions, 219 flow [2024-11-24 00:43:31,478 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 57.8) internal successors, (289), 5 states have internal predecessors, (289), 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) [2024-11-24 00:43:31,478 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-24 00:43:31,479 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-24 00:43:31,479 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-11-24 00:43:31,479 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr12REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr18REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 71 more)] === [2024-11-24 00:43:31,479 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-24 00:43:31,480 INFO L85 PathProgramCache]: Analyzing trace with hash 312232132, now seen corresponding path program 1 times [2024-11-24 00:43:31,480 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-24 00:43:31,480 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1453912277] [2024-11-24 00:43:31,480 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-24 00:43:31,480 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-24 00:43:31,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-24 00:43:31,829 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-24 00:43:31,829 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-24 00:43:31,829 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1453912277] [2024-11-24 00:43:31,829 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1453912277] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-24 00:43:31,829 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-24 00:43:31,829 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-11-24 00:43:31,829 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1302736925] [2024-11-24 00:43:31,829 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-24 00:43:31,830 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-24 00:43:31,830 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-24 00:43:31,830 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-24 00:43:31,830 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2024-11-24 00:43:32,335 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 52 out of 107 [2024-11-24 00:43:32,336 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 92 places, 89 transitions, 219 flow. Second operand has 7 states, 7 states have (on average 53.285714285714285) internal successors, (373), 7 states have internal predecessors, (373), 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) [2024-11-24 00:43:32,336 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-24 00:43:32,336 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 52 of 107 [2024-11-24 00:43:32,336 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-24 00:43:32,607 INFO L124 PetriNetUnfolderBase]: 64/285 cut-off events. [2024-11-24 00:43:32,607 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-11-24 00:43:32,608 INFO L83 FinitePrefix]: Finished finitePrefix Result has 491 conditions, 285 events. 64/285 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 1173 event pairs, 63 based on Foata normal form. 0/234 useless extension candidates. Maximal degree in co-relation 482. Up to 154 conditions per place. [2024-11-24 00:43:32,609 INFO L140 encePairwiseOnDemand]: 90/107 looper letters, 30 selfloop transitions, 18 changer transitions 0/85 dead transitions. [2024-11-24 00:43:32,609 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 95 places, 85 transitions, 307 flow [2024-11-24 00:43:32,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-24 00:43:32,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-11-24 00:43:32,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 463 transitions. [2024-11-24 00:43:32,611 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5408878504672897 [2024-11-24 00:43:32,612 INFO L175 Difference]: Start difference. First operand has 92 places, 89 transitions, 219 flow. Second operand 8 states and 463 transitions. [2024-11-24 00:43:32,612 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 95 places, 85 transitions, 307 flow [2024-11-24 00:43:32,613 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 94 places, 85 transitions, 305 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-24 00:43:32,614 INFO L231 Difference]: Finished difference. Result has 94 places, 85 transitions, 245 flow [2024-11-24 00:43:32,615 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=107, PETRI_DIFFERENCE_MINUEND_FLOW=209, PETRI_DIFFERENCE_MINUEND_PLACES=87, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=85, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=245, PETRI_PLACES=94, PETRI_TRANSITIONS=85} [2024-11-24 00:43:32,615 INFO L279 CegarLoopForPetriNet]: 109 programPoint places, -15 predicate places. [2024-11-24 00:43:32,615 INFO L471 AbstractCegarLoop]: Abstraction has has 94 places, 85 transitions, 245 flow [2024-11-24 00:43:32,616 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 53.285714285714285) internal successors, (373), 7 states have internal predecessors, (373), 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) [2024-11-24 00:43:32,616 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-24 00:43:32,616 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-24 00:43:32,616 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-11-24 00:43:32,617 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr18REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 71 more)] === [2024-11-24 00:43:32,617 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-24 00:43:32,617 INFO L85 PathProgramCache]: Analyzing trace with hash 312232133, now seen corresponding path program 1 times [2024-11-24 00:43:32,617 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-24 00:43:32,617 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [109221266] [2024-11-24 00:43:32,618 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-24 00:43:32,618 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-24 00:43:32,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-24 00:43:33,229 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-24 00:43:33,230 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-24 00:43:33,230 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [109221266] [2024-11-24 00:43:33,231 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [109221266] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-24 00:43:33,231 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-24 00:43:33,231 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-11-24 00:43:33,231 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [593129674] [2024-11-24 00:43:33,231 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-24 00:43:33,232 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-24 00:43:33,232 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-24 00:43:33,232 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-24 00:43:33,232 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2024-11-24 00:43:34,096 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 47 out of 107 [2024-11-24 00:43:34,096 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 94 places, 85 transitions, 245 flow. Second operand has 7 states, 7 states have (on average 48.285714285714285) internal successors, (338), 7 states have internal predecessors, (338), 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) [2024-11-24 00:43:34,097 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-24 00:43:34,097 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 47 of 107 [2024-11-24 00:43:34,097 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-24 00:43:34,389 INFO L124 PetriNetUnfolderBase]: 64/281 cut-off events. [2024-11-24 00:43:34,389 INFO L125 PetriNetUnfolderBase]: For 17/17 co-relation queries the response was YES. [2024-11-24 00:43:34,390 INFO L83 FinitePrefix]: Finished finitePrefix Result has 503 conditions, 281 events. 64/281 cut-off events. For 17/17 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 1180 event pairs, 63 based on Foata normal form. 2/234 useless extension candidates. Maximal degree in co-relation 494. Up to 158 conditions per place. [2024-11-24 00:43:34,391 INFO L140 encePairwiseOnDemand]: 95/107 looper letters, 32 selfloop transitions, 15 changer transitions 0/83 dead transitions. [2024-11-24 00:43:34,392 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 98 places, 83 transitions, 335 flow [2024-11-24 00:43:34,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-24 00:43:34,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-11-24 00:43:34,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 373 transitions. [2024-11-24 00:43:34,394 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4979973297730307 [2024-11-24 00:43:34,394 INFO L175 Difference]: Start difference. First operand has 94 places, 85 transitions, 245 flow. Second operand 7 states and 373 transitions. [2024-11-24 00:43:34,394 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 98 places, 83 transitions, 335 flow [2024-11-24 00:43:34,398 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 91 places, 83 transitions, 299 flow, removed 0 selfloop flow, removed 7 redundant places. [2024-11-24 00:43:34,400 INFO L231 Difference]: Finished difference. Result has 91 places, 83 transitions, 235 flow [2024-11-24 00:43:34,402 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=107, PETRI_DIFFERENCE_MINUEND_FLOW=205, PETRI_DIFFERENCE_MINUEND_PLACES=85, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=83, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=235, PETRI_PLACES=91, PETRI_TRANSITIONS=83} [2024-11-24 00:43:34,403 INFO L279 CegarLoopForPetriNet]: 109 programPoint places, -18 predicate places. [2024-11-24 00:43:34,403 INFO L471 AbstractCegarLoop]: Abstraction has has 91 places, 83 transitions, 235 flow [2024-11-24 00:43:34,403 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 48.285714285714285) internal successors, (338), 7 states have internal predecessors, (338), 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) [2024-11-24 00:43:34,405 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-24 00:43:34,405 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-24 00:43:34,406 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-11-24 00:43:34,406 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr16REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr18REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 71 more)] === [2024-11-24 00:43:34,406 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-24 00:43:34,406 INFO L85 PathProgramCache]: Analyzing trace with hash -592609288, now seen corresponding path program 1 times [2024-11-24 00:43:34,406 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-24 00:43:34,406 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [882889937] [2024-11-24 00:43:34,406 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-24 00:43:34,407 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-24 00:43:34,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-24 00:43:34,554 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-24 00:43:34,554 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-24 00:43:34,554 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [882889937] [2024-11-24 00:43:34,555 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [882889937] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-24 00:43:34,555 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-24 00:43:34,555 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-24 00:43:34,556 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [54172672] [2024-11-24 00:43:34,556 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-24 00:43:34,556 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-24 00:43:34,558 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-24 00:43:34,559 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-24 00:43:34,559 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-24 00:43:34,863 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 58 out of 107 [2024-11-24 00:43:34,865 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 91 places, 83 transitions, 235 flow. Second operand has 5 states, 5 states have (on average 60.0) internal successors, (300), 5 states have internal predecessors, (300), 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) [2024-11-24 00:43:34,865 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-24 00:43:34,865 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 58 of 107 [2024-11-24 00:43:34,865 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-24 00:43:35,071 INFO L124 PetriNetUnfolderBase]: 64/279 cut-off events. [2024-11-24 00:43:35,071 INFO L125 PetriNetUnfolderBase]: For 16/16 co-relation queries the response was YES. [2024-11-24 00:43:35,072 INFO L83 FinitePrefix]: Finished finitePrefix Result has 496 conditions, 279 events. 64/279 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 1168 event pairs, 63 based on Foata normal form. 2/231 useless extension candidates. Maximal degree in co-relation 487. Up to 158 conditions per place. [2024-11-24 00:43:35,073 INFO L140 encePairwiseOnDemand]: 96/107 looper letters, 30 selfloop transitions, 15 changer transitions 0/82 dead transitions. [2024-11-24 00:43:35,074 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 94 places, 82 transitions, 323 flow [2024-11-24 00:43:35,074 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-24 00:43:35,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-24 00:43:35,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 331 transitions. [2024-11-24 00:43:35,075 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6186915887850467 [2024-11-24 00:43:35,075 INFO L175 Difference]: Start difference. First operand has 91 places, 83 transitions, 235 flow. Second operand 5 states and 331 transitions. [2024-11-24 00:43:35,075 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 94 places, 82 transitions, 323 flow [2024-11-24 00:43:35,077 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 88 places, 82 transitions, 293 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-11-24 00:43:35,078 INFO L231 Difference]: Finished difference. Result has 88 places, 82 transitions, 233 flow [2024-11-24 00:43:35,079 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=107, PETRI_DIFFERENCE_MINUEND_FLOW=203, PETRI_DIFFERENCE_MINUEND_PLACES=84, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=82, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=233, PETRI_PLACES=88, PETRI_TRANSITIONS=82} [2024-11-24 00:43:35,079 INFO L279 CegarLoopForPetriNet]: 109 programPoint places, -21 predicate places. [2024-11-24 00:43:35,079 INFO L471 AbstractCegarLoop]: Abstraction has has 88 places, 82 transitions, 233 flow [2024-11-24 00:43:35,080 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 60.0) internal successors, (300), 5 states have internal predecessors, (300), 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) [2024-11-24 00:43:35,080 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-24 00:43:35,080 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-24 00:43:35,080 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-11-24 00:43:35,080 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr17REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr18REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 71 more)] === [2024-11-24 00:43:35,081 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-24 00:43:35,081 INFO L85 PathProgramCache]: Analyzing trace with hash -592609287, now seen corresponding path program 1 times [2024-11-24 00:43:35,081 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-24 00:43:35,081 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1838243976] [2024-11-24 00:43:35,081 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-24 00:43:35,081 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-24 00:43:35,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-24 00:43:35,302 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-24 00:43:35,302 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-24 00:43:35,302 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1838243976] [2024-11-24 00:43:35,302 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1838243976] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-24 00:43:35,302 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-24 00:43:35,302 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-24 00:43:35,302 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1169032761] [2024-11-24 00:43:35,303 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-24 00:43:35,303 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-24 00:43:35,303 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-24 00:43:35,303 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-24 00:43:35,304 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-24 00:43:35,605 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 62 out of 107 [2024-11-24 00:43:35,605 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 88 places, 82 transitions, 233 flow. Second operand has 5 states, 5 states have (on average 63.6) internal successors, (318), 5 states have internal predecessors, (318), 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) [2024-11-24 00:43:35,606 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-24 00:43:35,606 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 62 of 107 [2024-11-24 00:43:35,606 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-24 00:43:35,795 INFO L124 PetriNetUnfolderBase]: 64/277 cut-off events. [2024-11-24 00:43:35,795 INFO L125 PetriNetUnfolderBase]: For 28/28 co-relation queries the response was YES. [2024-11-24 00:43:35,796 INFO L83 FinitePrefix]: Finished finitePrefix Result has 488 conditions, 277 events. 64/277 cut-off events. For 28/28 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 1162 event pairs, 63 based on Foata normal form. 2/229 useless extension candidates. Maximal degree in co-relation 479. Up to 158 conditions per place. [2024-11-24 00:43:35,797 INFO L140 encePairwiseOnDemand]: 96/107 looper letters, 26 selfloop transitions, 15 changer transitions 0/81 dead transitions. [2024-11-24 00:43:35,797 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 91 places, 81 transitions, 313 flow [2024-11-24 00:43:35,798 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-24 00:43:35,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-24 00:43:35,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 347 transitions. [2024-11-24 00:43:35,800 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6485981308411215 [2024-11-24 00:43:35,800 INFO L175 Difference]: Start difference. First operand has 88 places, 82 transitions, 233 flow. Second operand 5 states and 347 transitions. [2024-11-24 00:43:35,800 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 91 places, 81 transitions, 313 flow [2024-11-24 00:43:35,801 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 87 places, 81 transitions, 283 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-11-24 00:43:35,802 INFO L231 Difference]: Finished difference. Result has 87 places, 81 transitions, 231 flow [2024-11-24 00:43:35,803 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=107, PETRI_DIFFERENCE_MINUEND_FLOW=201, PETRI_DIFFERENCE_MINUEND_PLACES=83, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=81, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=231, PETRI_PLACES=87, PETRI_TRANSITIONS=81} [2024-11-24 00:43:35,803 INFO L279 CegarLoopForPetriNet]: 109 programPoint places, -22 predicate places. [2024-11-24 00:43:35,803 INFO L471 AbstractCegarLoop]: Abstraction has has 87 places, 81 transitions, 231 flow [2024-11-24 00:43:35,804 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 63.6) internal successors, (318), 5 states have internal predecessors, (318), 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) [2024-11-24 00:43:35,804 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-24 00:43:35,804 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-24 00:43:35,804 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-11-24 00:43:35,804 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr18REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 71 more)] === [2024-11-24 00:43:35,804 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-24 00:43:35,804 INFO L85 PathProgramCache]: Analyzing trace with hash -891877433, now seen corresponding path program 1 times [2024-11-24 00:43:35,805 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-24 00:43:35,805 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1066133605] [2024-11-24 00:43:35,805 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-24 00:43:35,805 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-24 00:43:35,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-24 00:43:36,324 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-24 00:43:36,324 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-24 00:43:36,324 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1066133605] [2024-11-24 00:43:36,325 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1066133605] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-24 00:43:36,325 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1417683176] [2024-11-24 00:43:36,325 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-24 00:43:36,325 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-24 00:43:36,325 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_261b9b49-e0d7-4940-9b4b-0f55924bb174/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-24 00:43:36,329 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_261b9b49-e0d7-4940-9b4b-0f55924bb174/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-24 00:43:36,331 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_261b9b49-e0d7-4940-9b4b-0f55924bb174/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-24 00:43:36,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-24 00:43:36,524 INFO L256 TraceCheckSpWp]: Trace formula consists of 425 conjuncts, 45 conjuncts are in the unsatisfiable core [2024-11-24 00:43:36,532 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-24 00:43:36,664 INFO L349 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2024-11-24 00:43:36,665 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 13 [2024-11-24 00:43:36,700 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-24 00:43:36,700 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2024-11-24 00:43:36,831 INFO L349 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2024-11-24 00:43:36,834 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 13 [2024-11-24 00:43:36,851 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-11-24 00:43:36,871 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-24 00:43:36,871 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2024-11-24 00:43:37,075 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-24 00:43:37,076 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2024-11-24 00:43:37,125 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-24 00:43:37,126 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-24 00:43:37,459 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-24 00:43:37,459 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 43 treesize of output 61 [2024-11-24 00:43:37,589 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2024-11-24 00:43:37,589 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 12 [2024-11-24 00:43:37,690 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-24 00:43:37,690 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1417683176] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-24 00:43:37,690 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-24 00:43:37,690 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 4] total 17 [2024-11-24 00:43:37,691 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1509821460] [2024-11-24 00:43:37,691 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-24 00:43:37,691 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-11-24 00:43:37,692 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-24 00:43:37,692 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-11-24 00:43:37,692 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=261, Unknown=0, NotChecked=0, Total=342 [2024-11-24 00:43:41,981 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 56 out of 107 [2024-11-24 00:43:41,983 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 87 places, 81 transitions, 231 flow. Second operand has 19 states, 19 states have (on average 57.73684210526316) internal successors, (1097), 19 states have internal predecessors, (1097), 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) [2024-11-24 00:43:41,983 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-24 00:43:41,983 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 56 of 107 [2024-11-24 00:43:41,983 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-24 00:43:42,834 INFO L124 PetriNetUnfolderBase]: 75/332 cut-off events. [2024-11-24 00:43:42,834 INFO L125 PetriNetUnfolderBase]: For 49/49 co-relation queries the response was YES. [2024-11-24 00:43:42,835 INFO L83 FinitePrefix]: Finished finitePrefix Result has 611 conditions, 332 events. 75/332 cut-off events. For 49/49 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 1451 event pairs, 72 based on Foata normal form. 6/281 useless extension candidates. Maximal degree in co-relation 602. Up to 178 conditions per place. [2024-11-24 00:43:42,837 INFO L140 encePairwiseOnDemand]: 98/107 looper letters, 46 selfloop transitions, 16 changer transitions 0/101 dead transitions. [2024-11-24 00:43:42,837 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 96 places, 101 transitions, 459 flow [2024-11-24 00:43:42,837 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-11-24 00:43:42,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-11-24 00:43:42,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 685 transitions. [2024-11-24 00:43:42,840 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5819881053525914 [2024-11-24 00:43:42,840 INFO L175 Difference]: Start difference. First operand has 87 places, 81 transitions, 231 flow. Second operand 11 states and 685 transitions. [2024-11-24 00:43:42,840 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 96 places, 101 transitions, 459 flow [2024-11-24 00:43:42,842 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 92 places, 101 transitions, 393 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-11-24 00:43:42,843 INFO L231 Difference]: Finished difference. Result has 97 places, 89 transitions, 305 flow [2024-11-24 00:43:42,843 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=107, PETRI_DIFFERENCE_MINUEND_FLOW=197, PETRI_DIFFERENCE_MINUEND_PLACES=82, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=80, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=305, PETRI_PLACES=97, PETRI_TRANSITIONS=89} [2024-11-24 00:43:42,844 INFO L279 CegarLoopForPetriNet]: 109 programPoint places, -12 predicate places. [2024-11-24 00:43:42,844 INFO L471 AbstractCegarLoop]: Abstraction has has 97 places, 89 transitions, 305 flow [2024-11-24 00:43:42,845 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 57.73684210526316) internal successors, (1097), 19 states have internal predecessors, (1097), 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) [2024-11-24 00:43:42,845 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-24 00:43:42,845 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1] [2024-11-24 00:43:42,857 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_261b9b49-e0d7-4940-9b4b-0f55924bb174/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-11-24 00:43:43,046 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_261b9b49-e0d7-4940-9b4b-0f55924bb174/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-24 00:43:43,046 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr23REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr18REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 71 more)] === [2024-11-24 00:43:43,047 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-24 00:43:43,047 INFO L85 PathProgramCache]: Analyzing trace with hash 1240293804, now seen corresponding path program 1 times [2024-11-24 00:43:43,047 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-24 00:43:43,047 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1684613048] [2024-11-24 00:43:43,047 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-24 00:43:43,047 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-24 00:43:43,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-24 00:43:43,266 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-24 00:43:43,267 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-24 00:43:43,267 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1684613048] [2024-11-24 00:43:43,267 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1684613048] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-24 00:43:43,268 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2074204506] [2024-11-24 00:43:43,268 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-24 00:43:43,268 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-24 00:43:43,268 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_261b9b49-e0d7-4940-9b4b-0f55924bb174/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-24 00:43:43,270 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_261b9b49-e0d7-4940-9b4b-0f55924bb174/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-24 00:43:43,274 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_261b9b49-e0d7-4940-9b4b-0f55924bb174/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-24 00:43:43,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-24 00:43:43,497 INFO L256 TraceCheckSpWp]: Trace formula consists of 626 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-11-24 00:43:43,499 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-24 00:43:43,545 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-24 00:43:43,545 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-24 00:43:43,605 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-24 00:43:43,605 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2074204506] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-24 00:43:43,605 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-24 00:43:43,606 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 8 [2024-11-24 00:43:43,606 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [665767326] [2024-11-24 00:43:43,606 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-24 00:43:43,606 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-11-24 00:43:43,606 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-24 00:43:43,607 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-11-24 00:43:43,607 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2024-11-24 00:43:43,628 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 73 out of 107 [2024-11-24 00:43:43,629 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 97 places, 89 transitions, 305 flow. Second operand has 9 states, 9 states have (on average 77.55555555555556) internal successors, (698), 9 states have internal predecessors, (698), 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) [2024-11-24 00:43:43,630 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-24 00:43:43,630 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 73 of 107 [2024-11-24 00:43:43,630 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-24 00:43:43,926 INFO L124 PetriNetUnfolderBase]: 64/318 cut-off events. [2024-11-24 00:43:43,926 INFO L125 PetriNetUnfolderBase]: For 108/108 co-relation queries the response was YES. [2024-11-24 00:43:43,927 INFO L83 FinitePrefix]: Finished finitePrefix Result has 618 conditions, 318 events. 64/318 cut-off events. For 108/108 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 1132 event pairs, 63 based on Foata normal form. 4/272 useless extension candidates. Maximal degree in co-relation 603. Up to 154 conditions per place. [2024-11-24 00:43:43,928 INFO L140 encePairwiseOnDemand]: 103/107 looper letters, 62 selfloop transitions, 8 changer transitions 0/111 dead transitions. [2024-11-24 00:43:43,929 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 104 places, 111 transitions, 541 flow [2024-11-24 00:43:43,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-24 00:43:43,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-11-24 00:43:43,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 658 transitions. [2024-11-24 00:43:43,931 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.7686915887850467 [2024-11-24 00:43:43,932 INFO L175 Difference]: Start difference. First operand has 97 places, 89 transitions, 305 flow. Second operand 8 states and 658 transitions. [2024-11-24 00:43:43,932 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 104 places, 111 transitions, 541 flow [2024-11-24 00:43:43,934 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 102 places, 111 transitions, 521 flow, removed 5 selfloop flow, removed 2 redundant places. [2024-11-24 00:43:43,935 INFO L231 Difference]: Finished difference. Result has 105 places, 90 transitions, 321 flow [2024-11-24 00:43:43,936 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=107, PETRI_DIFFERENCE_MINUEND_FLOW=269, PETRI_DIFFERENCE_MINUEND_PLACES=95, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=87, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=81, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=321, PETRI_PLACES=105, PETRI_TRANSITIONS=90} [2024-11-24 00:43:43,936 INFO L279 CegarLoopForPetriNet]: 109 programPoint places, -4 predicate places. [2024-11-24 00:43:43,937 INFO L471 AbstractCegarLoop]: Abstraction has has 105 places, 90 transitions, 321 flow [2024-11-24 00:43:43,937 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 77.55555555555556) internal successors, (698), 9 states have internal predecessors, (698), 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) [2024-11-24 00:43:43,937 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-24 00:43:43,937 INFO L206 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 1, 1] [2024-11-24 00:43:43,949 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_261b9b49-e0d7-4940-9b4b-0f55924bb174/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-11-24 00:43:44,138 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_261b9b49-e0d7-4940-9b4b-0f55924bb174/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2024-11-24 00:43:44,138 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr18REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 71 more)] === [2024-11-24 00:43:44,139 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-24 00:43:44,139 INFO L85 PathProgramCache]: Analyzing trace with hash 799481831, now seen corresponding path program 2 times [2024-11-24 00:43:44,139 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-24 00:43:44,139 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [788651894] [2024-11-24 00:43:44,139 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-24 00:43:44,140 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-24 00:43:44,293 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-24 00:43:44,293 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-24 00:43:46,172 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 4 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-24 00:43:46,172 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-24 00:43:46,173 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [788651894] [2024-11-24 00:43:46,173 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [788651894] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-24 00:43:46,173 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1138027902] [2024-11-24 00:43:46,173 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-24 00:43:46,173 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-24 00:43:46,173 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_261b9b49-e0d7-4940-9b4b-0f55924bb174/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-24 00:43:46,175 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_261b9b49-e0d7-4940-9b4b-0f55924bb174/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-24 00:43:46,179 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_261b9b49-e0d7-4940-9b4b-0f55924bb174/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-24 00:43:46,578 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-24 00:43:46,578 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-24 00:43:46,584 INFO L256 TraceCheckSpWp]: Trace formula consists of 1022 conjuncts, 105 conjuncts are in the unsatisfiable core [2024-11-24 00:43:46,593 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-24 00:43:46,647 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-24 00:43:46,648 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2024-11-24 00:43:46,664 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2024-11-24 00:43:46,772 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-24 00:43:46,773 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2024-11-24 00:43:46,782 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2024-11-24 00:43:46,844 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 4 [2024-11-24 00:43:46,935 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-24 00:43:46,936 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2024-11-24 00:43:47,011 INFO L349 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2024-11-24 00:43:47,012 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 13 [2024-11-24 00:43:47,034 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-24 00:43:47,034 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2024-11-24 00:43:47,205 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-24 00:43:47,206 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2024-11-24 00:43:47,264 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-24 00:43:47,265 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2024-11-24 00:43:47,275 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2024-11-24 00:43:47,446 INFO L349 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2024-11-24 00:43:47,446 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 13 [2024-11-24 00:43:47,462 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-24 00:43:47,462 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2024-11-24 00:43:47,573 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-24 00:43:47,574 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2024-11-24 00:43:47,585 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2024-11-24 00:43:47,594 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2024-11-24 00:43:47,774 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 4 [2024-11-24 00:43:47,918 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-24 00:43:47,919 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2024-11-24 00:43:47,973 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 4 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-24 00:43:47,974 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-24 00:43:48,232 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2024-11-24 00:43:48,232 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 12 [2024-11-24 00:43:48,373 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2024-11-24 00:43:48,374 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 12 [2024-11-24 00:43:48,591 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2024-11-24 00:43:48,591 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 12 [2024-11-24 00:43:48,718 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2024-11-24 00:43:48,718 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 12 [2024-11-24 00:43:48,923 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2024-11-24 00:43:48,924 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 12 [2024-11-24 00:43:49,062 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2024-11-24 00:43:49,062 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 12 [2024-11-24 00:43:49,297 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2024-11-24 00:43:49,297 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 12 [2024-11-24 00:43:49,423 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2024-11-24 00:43:49,424 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 12 [2024-11-24 00:43:49,556 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 4 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-24 00:43:49,556 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1138027902] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-24 00:43:49,556 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-24 00:43:49,556 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 20, 15] total 50 [2024-11-24 00:43:49,556 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [584550462] [2024-11-24 00:43:49,557 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-24 00:43:49,557 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2024-11-24 00:43:49,558 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-24 00:43:49,558 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2024-11-24 00:43:49,560 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=628, Invalid=2024, Unknown=0, NotChecked=0, Total=2652 [2024-11-24 00:44:00,188 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 56 out of 107 [2024-11-24 00:44:00,191 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 105 places, 90 transitions, 321 flow. Second operand has 52 states, 52 states have (on average 57.84615384615385) internal successors, (3008), 52 states have internal predecessors, (3008), 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) [2024-11-24 00:44:00,191 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-24 00:44:00,191 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 56 of 107 [2024-11-24 00:44:00,192 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-24 00:44:01,972 INFO L124 PetriNetUnfolderBase]: 77/394 cut-off events. [2024-11-24 00:44:01,972 INFO L125 PetriNetUnfolderBase]: For 263/263 co-relation queries the response was YES. [2024-11-24 00:44:01,973 INFO L83 FinitePrefix]: Finished finitePrefix Result has 840 conditions, 394 events. 77/394 cut-off events. For 263/263 co-relation queries the response was YES. Maximal size of possible extension queue 24. Compared 1533 event pairs, 72 based on Foata normal form. 6/346 useless extension candidates. Maximal degree in co-relation 821. Up to 180 conditions per place. [2024-11-24 00:44:01,975 INFO L140 encePairwiseOnDemand]: 99/107 looper letters, 74 selfloop transitions, 32 changer transitions 0/145 dead transitions. [2024-11-24 00:44:01,975 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 131 places, 145 transitions, 867 flow [2024-11-24 00:44:01,976 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2024-11-24 00:44:01,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2024-11-24 00:44:01,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 1624 transitions. [2024-11-24 00:44:01,981 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5621322256836275 [2024-11-24 00:44:01,981 INFO L175 Difference]: Start difference. First operand has 105 places, 90 transitions, 321 flow. Second operand 27 states and 1624 transitions. [2024-11-24 00:44:01,982 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 131 places, 145 transitions, 867 flow [2024-11-24 00:44:01,985 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 128 places, 145 transitions, 851 flow, removed 5 selfloop flow, removed 3 redundant places. [2024-11-24 00:44:01,988 INFO L231 Difference]: Finished difference. Result has 141 places, 106 transitions, 585 flow [2024-11-24 00:44:01,988 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=107, PETRI_DIFFERENCE_MINUEND_FLOW=313, PETRI_DIFFERENCE_MINUEND_PLACES=102, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=90, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=27, PETRI_FLOW=585, PETRI_PLACES=141, PETRI_TRANSITIONS=106} [2024-11-24 00:44:01,989 INFO L279 CegarLoopForPetriNet]: 109 programPoint places, 32 predicate places. [2024-11-24 00:44:01,990 INFO L471 AbstractCegarLoop]: Abstraction has has 141 places, 106 transitions, 585 flow [2024-11-24 00:44:01,991 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 52 states have (on average 57.84615384615385) internal successors, (3008), 52 states have internal predecessors, (3008), 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) [2024-11-24 00:44:01,991 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-24 00:44:01,991 INFO L206 CegarLoopForPetriNet]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1] [2024-11-24 00:44:02,002 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_261b9b49-e0d7-4940-9b4b-0f55924bb174/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-11-24 00:44:02,192 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_261b9b49-e0d7-4940-9b4b-0f55924bb174/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2024-11-24 00:44:02,192 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr23REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr18REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 71 more)] === [2024-11-24 00:44:02,192 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-24 00:44:02,192 INFO L85 PathProgramCache]: Analyzing trace with hash 507741996, now seen corresponding path program 2 times [2024-11-24 00:44:02,193 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-24 00:44:02,193 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [545312706] [2024-11-24 00:44:02,193 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-24 00:44:02,193 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-24 00:44:02,288 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-24 00:44:02,288 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-24 00:44:02,890 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 27 proven. 0 refuted. 0 times theorem prover too weak. 135 trivial. 0 not checked. [2024-11-24 00:44:02,890 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-24 00:44:02,890 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [545312706] [2024-11-24 00:44:02,890 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [545312706] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-24 00:44:02,890 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-24 00:44:02,890 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-24 00:44:02,890 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [41302003] [2024-11-24 00:44:02,891 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-24 00:44:02,891 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-24 00:44:02,891 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-24 00:44:02,892 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-24 00:44:02,892 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-11-24 00:44:03,396 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 64 out of 107 [2024-11-24 00:44:03,397 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 141 places, 106 transitions, 585 flow. Second operand has 6 states, 6 states have (on average 66.33333333333333) internal successors, (398), 6 states have internal predecessors, (398), 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) [2024-11-24 00:44:03,397 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-24 00:44:03,397 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 64 of 107 [2024-11-24 00:44:03,397 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-24 00:44:03,725 INFO L124 PetriNetUnfolderBase]: 116/562 cut-off events. [2024-11-24 00:44:03,725 INFO L125 PetriNetUnfolderBase]: For 530/530 co-relation queries the response was YES. [2024-11-24 00:44:03,727 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1189 conditions, 562 events. 116/562 cut-off events. For 530/530 co-relation queries the response was YES. Maximal size of possible extension queue 36. Compared 2921 event pairs, 36 based on Foata normal form. 0/455 useless extension candidates. Maximal degree in co-relation 1156. Up to 161 conditions per place. [2024-11-24 00:44:03,729 INFO L140 encePairwiseOnDemand]: 98/107 looper letters, 56 selfloop transitions, 25 changer transitions 0/119 dead transitions. [2024-11-24 00:44:03,729 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 145 places, 119 transitions, 773 flow [2024-11-24 00:44:03,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-24 00:44:03,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-24 00:44:03,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 438 transitions. [2024-11-24 00:44:03,731 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6822429906542056 [2024-11-24 00:44:03,732 INFO L175 Difference]: Start difference. First operand has 141 places, 106 transitions, 585 flow. Second operand 6 states and 438 transitions. [2024-11-24 00:44:03,732 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 145 places, 119 transitions, 773 flow [2024-11-24 00:44:03,737 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 134 places, 119 transitions, 679 flow, removed 28 selfloop flow, removed 11 redundant places. [2024-11-24 00:44:03,742 INFO L231 Difference]: Finished difference. Result has 135 places, 107 transitions, 556 flow [2024-11-24 00:44:03,742 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=107, PETRI_DIFFERENCE_MINUEND_FLOW=489, PETRI_DIFFERENCE_MINUEND_PLACES=129, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=105, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=80, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=556, PETRI_PLACES=135, PETRI_TRANSITIONS=107} [2024-11-24 00:44:03,743 INFO L279 CegarLoopForPetriNet]: 109 programPoint places, 26 predicate places. [2024-11-24 00:44:03,744 INFO L471 AbstractCegarLoop]: Abstraction has has 135 places, 107 transitions, 556 flow [2024-11-24 00:44:03,744 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 66.33333333333333) internal successors, (398), 6 states have internal predecessors, (398), 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) [2024-11-24 00:44:03,745 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-24 00:44:03,745 INFO L206 CegarLoopForPetriNet]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1] [2024-11-24 00:44:03,745 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-11-24 00:44:03,745 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr25REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr18REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 71 more)] === [2024-11-24 00:44:03,746 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-24 00:44:03,746 INFO L85 PathProgramCache]: Analyzing trace with hash -1439866568, now seen corresponding path program 1 times [2024-11-24 00:44:03,746 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-24 00:44:03,747 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1475216729] [2024-11-24 00:44:03,747 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-24 00:44:03,748 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-24 00:44:03,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-24 00:44:04,232 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 6 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-24 00:44:04,233 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-24 00:44:04,233 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1475216729] [2024-11-24 00:44:04,233 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1475216729] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-24 00:44:04,233 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1521649593] [2024-11-24 00:44:04,233 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-24 00:44:04,233 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-24 00:44:04,234 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_261b9b49-e0d7-4940-9b4b-0f55924bb174/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-24 00:44:04,236 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_261b9b49-e0d7-4940-9b4b-0f55924bb174/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-24 00:44:04,240 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_261b9b49-e0d7-4940-9b4b-0f55924bb174/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-24 00:44:04,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-24 00:44:04,750 INFO L256 TraceCheckSpWp]: Trace formula consists of 1446 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-24 00:44:04,755 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-24 00:44:04,869 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 6 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-24 00:44:04,869 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-24 00:44:05,047 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 6 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-24 00:44:05,047 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1521649593] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-24 00:44:05,047 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-24 00:44:05,048 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 12 [2024-11-24 00:44:05,048 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1168242465] [2024-11-24 00:44:05,048 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-24 00:44:05,048 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-11-24 00:44:05,049 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-24 00:44:05,049 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-11-24 00:44:05,049 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2024-11-24 00:44:05,080 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 73 out of 107 [2024-11-24 00:44:05,081 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 135 places, 107 transitions, 556 flow. Second operand has 13 states, 13 states have (on average 78.92307692307692) internal successors, (1026), 13 states have internal predecessors, (1026), 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) [2024-11-24 00:44:05,081 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-24 00:44:05,081 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 73 of 107 [2024-11-24 00:44:05,081 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-24 00:44:05,464 INFO L124 PetriNetUnfolderBase]: 95/481 cut-off events. [2024-11-24 00:44:05,464 INFO L125 PetriNetUnfolderBase]: For 497/498 co-relation queries the response was YES. [2024-11-24 00:44:05,467 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1066 conditions, 481 events. 95/481 cut-off events. For 497/498 co-relation queries the response was YES. Maximal size of possible extension queue 27. Compared 2037 event pairs, 87 based on Foata normal form. 4/410 useless extension candidates. Maximal degree in co-relation 1033. Up to 220 conditions per place. [2024-11-24 00:44:05,469 INFO L140 encePairwiseOnDemand]: 103/107 looper letters, 89 selfloop transitions, 12 changer transitions 0/141 dead transitions. [2024-11-24 00:44:05,472 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 146 places, 141 transitions, 933 flow [2024-11-24 00:44:05,472 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-11-24 00:44:05,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-11-24 00:44:05,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 978 transitions. [2024-11-24 00:44:05,475 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.7616822429906542 [2024-11-24 00:44:05,476 INFO L175 Difference]: Start difference. First operand has 135 places, 107 transitions, 556 flow. Second operand 12 states and 978 transitions. [2024-11-24 00:44:05,476 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 146 places, 141 transitions, 933 flow [2024-11-24 00:44:05,484 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 143 places, 141 transitions, 895 flow, removed 6 selfloop flow, removed 3 redundant places. [2024-11-24 00:44:05,486 INFO L231 Difference]: Finished difference. Result has 144 places, 104 transitions, 500 flow [2024-11-24 00:44:05,486 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=107, PETRI_DIFFERENCE_MINUEND_FLOW=463, PETRI_DIFFERENCE_MINUEND_PLACES=132, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=103, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=91, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=500, PETRI_PLACES=144, PETRI_TRANSITIONS=104} [2024-11-24 00:44:05,487 INFO L279 CegarLoopForPetriNet]: 109 programPoint places, 35 predicate places. [2024-11-24 00:44:05,487 INFO L471 AbstractCegarLoop]: Abstraction has has 144 places, 104 transitions, 500 flow [2024-11-24 00:44:05,488 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 78.92307692307692) internal successors, (1026), 13 states have internal predecessors, (1026), 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) [2024-11-24 00:44:05,489 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-24 00:44:05,489 INFO L206 CegarLoopForPetriNet]: trace histogram [11, 11, 11, 10, 10, 10, 10, 10, 10, 10, 1, 1] [2024-11-24 00:44:05,499 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_261b9b49-e0d7-4940-9b4b-0f55924bb174/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-11-24 00:44:05,693 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_261b9b49-e0d7-4940-9b4b-0f55924bb174/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2024-11-24 00:44:05,693 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr18REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 71 more)] === [2024-11-24 00:44:05,694 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-24 00:44:05,694 INFO L85 PathProgramCache]: Analyzing trace with hash -622434265, now seen corresponding path program 3 times [2024-11-24 00:44:05,694 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-24 00:44:05,694 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [73383279] [2024-11-24 00:44:05,694 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-24 00:44:05,694 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-24 00:44:06,665 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2024-11-24 00:44:06,666 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-24 00:44:07,406 INFO L134 CoverageAnalysis]: Checked inductivity of 500 backedges. 409 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-24 00:44:07,406 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-24 00:44:07,406 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [73383279] [2024-11-24 00:44:07,406 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [73383279] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-24 00:44:07,407 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1575773496] [2024-11-24 00:44:07,407 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-24 00:44:07,407 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-24 00:44:07,407 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_261b9b49-e0d7-4940-9b4b-0f55924bb174/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-24 00:44:07,409 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_261b9b49-e0d7-4940-9b4b-0f55924bb174/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-24 00:44:07,412 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_261b9b49-e0d7-4940-9b4b-0f55924bb174/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process