./Ultimate.py --spec /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/properties/valid-memsafety.prp --file /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/goblint-regression/28-race_reach_86-lists_racing-deref.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version a046e57d Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/goblint-regression/28-race_reach_86-lists_racing-deref.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash db5eab03de8fef3e653289c5dcf0b220be6d8b09a4df3c07d6d5a066426e755a --- Real Ultimate output --- This is Ultimate 0.2.5-tmp.dk.eval-mul-div-a046e57-m [2024-10-13 12:33:11,341 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-10-13 12:33:11,395 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2024-10-13 12:33:11,400 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-10-13 12:33:11,400 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-10-13 12:33:11,425 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-10-13 12:33:11,425 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-10-13 12:33:11,425 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-10-13 12:33:11,426 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-10-13 12:33:11,426 INFO L153 SettingsManager]: * Use memory slicer=true [2024-10-13 12:33:11,426 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-10-13 12:33:11,427 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-10-13 12:33:11,428 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-10-13 12:33:11,429 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-10-13 12:33:11,429 INFO L153 SettingsManager]: * Use SBE=true [2024-10-13 12:33:11,430 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-10-13 12:33:11,430 INFO L153 SettingsManager]: * sizeof long=4 [2024-10-13 12:33:11,430 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-10-13 12:33:11,430 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-10-13 12:33:11,431 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-10-13 12:33:11,431 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2024-10-13 12:33:11,431 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2024-10-13 12:33:11,432 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2024-10-13 12:33:11,432 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-10-13 12:33:11,432 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-10-13 12:33:11,432 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-10-13 12:33:11,432 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2024-10-13 12:33:11,433 INFO L153 SettingsManager]: * sizeof long double=12 [2024-10-13 12:33:11,433 INFO L153 SettingsManager]: * Use constant arrays=true [2024-10-13 12:33:11,433 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-10-13 12:33:11,433 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-10-13 12:33:11,434 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-10-13 12:33:11,434 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-10-13 12:33:11,434 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-13 12:33:11,434 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-10-13 12:33:11,435 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-10-13 12:33:11,435 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-10-13 12:33:11,435 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-10-13 12:33:11,435 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-10-13 12:33:11,436 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-10-13 12:33:11,436 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-10-13 12:33:11,436 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-10-13 12:33:11,436 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> db5eab03de8fef3e653289c5dcf0b220be6d8b09a4df3c07d6d5a066426e755a [2024-10-13 12:33:11,660 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-10-13 12:33:11,683 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-10-13 12:33:11,685 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-10-13 12:33:11,686 INFO L270 PluginConnector]: Initializing CDTParser... [2024-10-13 12:33:11,686 INFO L274 PluginConnector]: CDTParser initialized [2024-10-13 12:33:11,687 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/goblint-regression/28-race_reach_86-lists_racing-deref.i [2024-10-13 12:33:12,958 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-10-13 12:33:13,197 INFO L384 CDTParser]: Found 1 translation units. [2024-10-13 12:33:13,198 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/goblint-regression/28-race_reach_86-lists_racing-deref.i [2024-10-13 12:33:13,216 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bce5fc821/36124ea033c741d185d6b2e0a2ba15b3/FLAG53b8183dc [2024-10-13 12:33:13,525 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bce5fc821/36124ea033c741d185d6b2e0a2ba15b3 [2024-10-13 12:33:13,527 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-10-13 12:33:13,528 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-10-13 12:33:13,530 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-10-13 12:33:13,530 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-10-13 12:33:13,535 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-10-13 12:33:13,536 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 12:33:13" (1/1) ... [2024-10-13 12:33:13,536 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5f4fa2db and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 12:33:13, skipping insertion in model container [2024-10-13 12:33:13,537 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 12:33:13" (1/1) ... [2024-10-13 12:33:13,573 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-10-13 12:33:13,950 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-13 12:33:14,009 INFO L200 MainTranslator]: Completed pre-run [2024-10-13 12:33:14,050 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-13 12:33:14,098 INFO L204 MainTranslator]: Completed translation [2024-10-13 12:33:14,098 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 12:33:14 WrapperNode [2024-10-13 12:33:14,098 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-10-13 12:33:14,099 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-10-13 12:33:14,099 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-10-13 12:33:14,100 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-10-13 12:33:14,105 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 12:33:14" (1/1) ... [2024-10-13 12:33:14,125 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 12:33:14" (1/1) ... [2024-10-13 12:33:14,176 INFO L138 Inliner]: procedures = 279, calls = 67, calls flagged for inlining = 8, calls inlined = 8, statements flattened = 250 [2024-10-13 12:33:14,182 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-10-13 12:33:14,183 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-10-13 12:33:14,185 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-10-13 12:33:14,185 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-10-13 12:33:14,210 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 12:33:14" (1/1) ... [2024-10-13 12:33:14,210 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 12:33:14" (1/1) ... [2024-10-13 12:33:14,214 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 12:33:14" (1/1) ... [2024-10-13 12:33:14,236 INFO L175 MemorySlicer]: Split 35 memory accesses to 8 slices as follows [2, 14, 5, 4, 2, 5, 1, 2]. 40 percent of accesses are in the largest equivalence class. The 12 initializations are split as follows [2, 0, 5, 0, 0, 5, 0, 0]. The 13 writes are split as follows [0, 8, 0, 2, 1, 0, 1, 1]. [2024-10-13 12:33:14,236 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 12:33:14" (1/1) ... [2024-10-13 12:33:14,237 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 12:33:14" (1/1) ... [2024-10-13 12:33:14,258 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 12:33:14" (1/1) ... [2024-10-13 12:33:14,264 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 12:33:14" (1/1) ... [2024-10-13 12:33:14,267 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 12:33:14" (1/1) ... [2024-10-13 12:33:14,269 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 12:33:14" (1/1) ... [2024-10-13 12:33:14,274 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-10-13 12:33:14,274 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-10-13 12:33:14,275 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-10-13 12:33:14,275 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-10-13 12:33:14,275 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 12:33:14" (1/1) ... [2024-10-13 12:33:14,282 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-13 12:33:14,293 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-13 12:33:14,315 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-10-13 12:33:14,318 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-10-13 12:33:14,366 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-10-13 12:33:14,366 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#0 [2024-10-13 12:33:14,366 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#1 [2024-10-13 12:33:14,366 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#2 [2024-10-13 12:33:14,367 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#3 [2024-10-13 12:33:14,367 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#4 [2024-10-13 12:33:14,367 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#5 [2024-10-13 12:33:14,367 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#6 [2024-10-13 12:33:14,367 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#7 [2024-10-13 12:33:14,367 INFO L130 BoogieDeclarations]: Found specification of procedure t1_fun [2024-10-13 12:33:14,367 INFO L138 BoogieDeclarations]: Found implementation of procedure t1_fun [2024-10-13 12:33:14,367 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-10-13 12:33:14,368 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexUnlock [2024-10-13 12:33:14,368 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-10-13 12:33:14,368 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-10-13 12:33:14,368 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2024-10-13 12:33:14,368 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#3 [2024-10-13 12:33:14,368 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#4 [2024-10-13 12:33:14,368 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#5 [2024-10-13 12:33:14,368 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#6 [2024-10-13 12:33:14,368 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#7 [2024-10-13 12:33:14,368 INFO L130 BoogieDeclarations]: Found specification of procedure t2_fun [2024-10-13 12:33:14,368 INFO L138 BoogieDeclarations]: Found implementation of procedure t2_fun [2024-10-13 12:33:14,368 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-10-13 12:33:14,368 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-10-13 12:33:14,369 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2024-10-13 12:33:14,369 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2024-10-13 12:33:14,369 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#4 [2024-10-13 12:33:14,369 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#5 [2024-10-13 12:33:14,369 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#6 [2024-10-13 12:33:14,369 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#7 [2024-10-13 12:33:14,369 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2024-10-13 12:33:14,369 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-10-13 12:33:14,369 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-10-13 12:33:14,369 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#0 [2024-10-13 12:33:14,369 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#1 [2024-10-13 12:33:14,369 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#2 [2024-10-13 12:33:14,369 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#3 [2024-10-13 12:33:14,370 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#4 [2024-10-13 12:33:14,370 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#5 [2024-10-13 12:33:14,370 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#6 [2024-10-13 12:33:14,370 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#7 [2024-10-13 12:33:14,370 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-10-13 12:33:14,370 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-10-13 12:33:14,370 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-10-13 12:33:14,372 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2024-10-13 12:33:14,373 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#4 [2024-10-13 12:33:14,373 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#5 [2024-10-13 12:33:14,373 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#6 [2024-10-13 12:33:14,373 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#7 [2024-10-13 12:33:14,373 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-10-13 12:33:14,373 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-10-13 12:33:14,376 WARN L207 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2024-10-13 12:33:14,553 INFO L238 CfgBuilder]: Building ICFG [2024-10-13 12:33:14,555 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-10-13 12:33:14,915 INFO L283 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-10-13 12:33:14,915 INFO L287 CfgBuilder]: Performing block encoding [2024-10-13 12:33:15,082 INFO L309 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-10-13 12:33:15,083 INFO L314 CfgBuilder]: Removed 16 assume(true) statements. [2024-10-13 12:33:15,083 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 12:33:15 BoogieIcfgContainer [2024-10-13 12:33:15,083 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-10-13 12:33:15,085 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-10-13 12:33:15,085 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-10-13 12:33:15,089 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-10-13 12:33:15,089 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 12:33:13" (1/3) ... [2024-10-13 12:33:15,090 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3ac9851 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 12:33:15, skipping insertion in model container [2024-10-13 12:33:15,090 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 12:33:14" (2/3) ... [2024-10-13 12:33:15,091 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3ac9851 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 12:33:15, skipping insertion in model container [2024-10-13 12:33:15,091 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 12:33:15" (3/3) ... [2024-10-13 12:33:15,093 INFO L112 eAbstractionObserver]: Analyzing ICFG 28-race_reach_86-lists_racing-deref.i [2024-10-13 12:33:15,107 INFO L209 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-10-13 12:33:15,108 INFO L149 ceAbstractionStarter]: Applying trace abstraction to program that has 44 error locations. [2024-10-13 12:33:15,108 INFO L484 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-10-13 12:33:15,211 INFO L143 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2024-10-13 12:33:15,245 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 129 places, 144 transitions, 308 flow [2024-10-13 12:33:15,318 INFO L124 PetriNetUnfolderBase]: 39/286 cut-off events. [2024-10-13 12:33:15,319 INFO L125 PetriNetUnfolderBase]: For 8/8 co-relation queries the response was YES. [2024-10-13 12:33:15,325 INFO L83 FinitePrefix]: Finished finitePrefix Result has 303 conditions, 286 events. 39/286 cut-off events. For 8/8 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 1504 event pairs, 0 based on Foata normal form. 0/155 useless extension candidates. Maximal degree in co-relation 149. Up to 8 conditions per place. [2024-10-13 12:33:15,326 INFO L82 GeneralOperation]: Start removeDead. Operand has 129 places, 144 transitions, 308 flow [2024-10-13 12:33:15,333 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 129 places, 144 transitions, 308 flow [2024-10-13 12:33:15,344 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-10-13 12:33:15,352 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;@194715f7, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-10-13 12:33:15,353 INFO L334 AbstractCegarLoop]: Starting to check reachability of 75 error locations. [2024-10-13 12:33:15,356 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-10-13 12:33:15,357 INFO L124 PetriNetUnfolderBase]: 0/4 cut-off events. [2024-10-13 12:33:15,357 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-10-13 12:33:15,357 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-13 12:33:15,358 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2024-10-13 12:33:15,359 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [t2_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t2_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t2_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 72 more)] === [2024-10-13 12:33:15,363 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 12:33:15,364 INFO L85 PathProgramCache]: Analyzing trace with hash 658500, now seen corresponding path program 1 times [2024-10-13 12:33:15,372 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 12:33:15,373 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [757543842] [2024-10-13 12:33:15,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 12:33:15,374 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 12:33:15,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 12:33:15,670 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 12:33:15,671 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 12:33:15,673 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [757543842] [2024-10-13 12:33:15,673 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [757543842] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-13 12:33:15,674 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-13 12:33:15,674 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-10-13 12:33:15,675 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [793606710] [2024-10-13 12:33:15,676 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-13 12:33:15,682 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-13 12:33:15,687 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 12:33:15,705 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-13 12:33:15,706 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-13 12:33:15,761 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 69 out of 144 [2024-10-13 12:33:15,764 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 129 places, 144 transitions, 308 flow. Second operand has 3 states, 3 states have (on average 70.0) internal successors, (210), 3 states have internal predecessors, (210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 12:33:15,764 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-13 12:33:15,765 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 69 of 144 [2024-10-13 12:33:15,765 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-13 12:33:16,672 INFO L124 PetriNetUnfolderBase]: 3268/7594 cut-off events. [2024-10-13 12:33:16,672 INFO L125 PetriNetUnfolderBase]: For 156/156 co-relation queries the response was YES. [2024-10-13 12:33:16,686 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12886 conditions, 7594 events. 3268/7594 cut-off events. For 156/156 co-relation queries the response was YES. Maximal size of possible extension queue 211. Compared 61752 event pairs, 3059 based on Foata normal form. 520/6970 useless extension candidates. Maximal degree in co-relation 11382. Up to 5189 conditions per place. [2024-10-13 12:33:16,721 INFO L140 encePairwiseOnDemand]: 127/144 looper letters, 57 selfloop transitions, 2 changer transitions 0/128 dead transitions. [2024-10-13 12:33:16,722 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 128 places, 128 transitions, 394 flow [2024-10-13 12:33:16,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-13 12:33:16,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-10-13 12:33:16,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 281 transitions. [2024-10-13 12:33:16,733 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6504629629629629 [2024-10-13 12:33:16,734 INFO L175 Difference]: Start difference. First operand has 129 places, 144 transitions, 308 flow. Second operand 3 states and 281 transitions. [2024-10-13 12:33:16,735 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 128 places, 128 transitions, 394 flow [2024-10-13 12:33:16,740 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 128 places, 128 transitions, 394 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-10-13 12:33:16,747 INFO L231 Difference]: Finished difference. Result has 128 places, 128 transitions, 280 flow [2024-10-13 12:33:16,749 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=144, PETRI_DIFFERENCE_MINUEND_FLOW=276, PETRI_DIFFERENCE_MINUEND_PLACES=126, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=128, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=126, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=280, PETRI_PLACES=128, PETRI_TRANSITIONS=128} [2024-10-13 12:33:16,752 INFO L277 CegarLoopForPetriNet]: 129 programPoint places, -1 predicate places. [2024-10-13 12:33:16,753 INFO L471 AbstractCegarLoop]: Abstraction has has 128 places, 128 transitions, 280 flow [2024-10-13 12:33:16,753 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 70.0) internal successors, (210), 3 states have internal predecessors, (210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 12:33:16,753 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-13 12:33:16,753 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2024-10-13 12:33:16,753 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-10-13 12:33:16,754 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [t2_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t2_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t2_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 72 more)] === [2024-10-13 12:33:16,754 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 12:33:16,754 INFO L85 PathProgramCache]: Analyzing trace with hash 658501, now seen corresponding path program 1 times [2024-10-13 12:33:16,754 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 12:33:16,754 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [999516503] [2024-10-13 12:33:16,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 12:33:16,755 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 12:33:16,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 12:33:16,885 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 12:33:16,886 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 12:33:16,886 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [999516503] [2024-10-13 12:33:16,887 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [999516503] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-13 12:33:16,887 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-13 12:33:16,888 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-10-13 12:33:16,888 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1560884244] [2024-10-13 12:33:16,888 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-13 12:33:16,889 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-13 12:33:16,889 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 12:33:16,890 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-13 12:33:16,890 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-13 12:33:16,948 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 70 out of 144 [2024-10-13 12:33:16,948 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 128 places, 128 transitions, 280 flow. Second operand has 3 states, 3 states have (on average 71.0) internal successors, (213), 3 states have internal predecessors, (213), 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) [2024-10-13 12:33:16,949 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-13 12:33:16,949 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 70 of 144 [2024-10-13 12:33:16,949 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-13 12:33:17,794 INFO L124 PetriNetUnfolderBase]: 3268/7592 cut-off events. [2024-10-13 12:33:17,797 INFO L125 PetriNetUnfolderBase]: For 157/157 co-relation queries the response was YES. [2024-10-13 12:33:17,809 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12886 conditions, 7592 events. 3268/7592 cut-off events. For 157/157 co-relation queries the response was YES. Maximal size of possible extension queue 211. Compared 61860 event pairs, 3059 based on Foata normal form. 2/6451 useless extension candidates. Maximal degree in co-relation 12870. Up to 5189 conditions per place. [2024-10-13 12:33:17,851 INFO L140 encePairwiseOnDemand]: 140/144 looper letters, 56 selfloop transitions, 2 changer transitions 0/126 dead transitions. [2024-10-13 12:33:17,852 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 128 places, 126 transitions, 392 flow [2024-10-13 12:33:17,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-13 12:33:17,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-10-13 12:33:17,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 270 transitions. [2024-10-13 12:33:17,856 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.625 [2024-10-13 12:33:17,856 INFO L175 Difference]: Start difference. First operand has 128 places, 128 transitions, 280 flow. Second operand 3 states and 270 transitions. [2024-10-13 12:33:17,857 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 128 places, 126 transitions, 392 flow [2024-10-13 12:33:17,860 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 126 places, 126 transitions, 388 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-10-13 12:33:17,862 INFO L231 Difference]: Finished difference. Result has 126 places, 126 transitions, 276 flow [2024-10-13 12:33:17,862 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=144, PETRI_DIFFERENCE_MINUEND_FLOW=272, PETRI_DIFFERENCE_MINUEND_PLACES=124, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=126, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=124, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=276, PETRI_PLACES=126, PETRI_TRANSITIONS=126} [2024-10-13 12:33:17,863 INFO L277 CegarLoopForPetriNet]: 129 programPoint places, -3 predicate places. [2024-10-13 12:33:17,863 INFO L471 AbstractCegarLoop]: Abstraction has has 126 places, 126 transitions, 276 flow [2024-10-13 12:33:17,864 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 71.0) internal successors, (213), 3 states have internal predecessors, (213), 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) [2024-10-13 12:33:17,864 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-13 12:33:17,864 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2024-10-13 12:33:17,864 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-10-13 12:33:17,864 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [t2_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t2_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t2_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 72 more)] === [2024-10-13 12:33:17,865 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 12:33:17,865 INFO L85 PathProgramCache]: Analyzing trace with hash 20416697, now seen corresponding path program 1 times [2024-10-13 12:33:17,865 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 12:33:17,865 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [489690349] [2024-10-13 12:33:17,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 12:33:17,865 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 12:33:17,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 12:33:17,892 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 12:33:17,892 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 12:33:17,892 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [489690349] [2024-10-13 12:33:17,893 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [489690349] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-13 12:33:17,893 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-13 12:33:17,893 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-10-13 12:33:17,893 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1550428368] [2024-10-13 12:33:17,893 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-13 12:33:17,893 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-13 12:33:17,894 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 12:33:17,894 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-13 12:33:17,894 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-13 12:33:17,897 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 72 out of 144 [2024-10-13 12:33:17,897 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 126 places, 126 transitions, 276 flow. Second operand has 3 states, 3 states have (on average 73.0) internal successors, (219), 3 states have internal predecessors, (219), 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) [2024-10-13 12:33:17,897 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-13 12:33:17,897 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 72 of 144 [2024-10-13 12:33:17,897 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-13 12:33:18,631 INFO L124 PetriNetUnfolderBase]: 3268/7598 cut-off events. [2024-10-13 12:33:18,631 INFO L125 PetriNetUnfolderBase]: For 158/158 co-relation queries the response was YES. [2024-10-13 12:33:18,644 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12897 conditions, 7598 events. 3268/7598 cut-off events. For 158/158 co-relation queries the response was YES. Maximal size of possible extension queue 211. Compared 61836 event pairs, 3059 based on Foata normal form. 1/6455 useless extension candidates. Maximal degree in co-relation 12872. Up to 5190 conditions per place. [2024-10-13 12:33:18,677 INFO L140 encePairwiseOnDemand]: 141/144 looper letters, 59 selfloop transitions, 2 changer transitions 0/129 dead transitions. [2024-10-13 12:33:18,678 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 128 places, 129 transitions, 408 flow [2024-10-13 12:33:18,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-13 12:33:18,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-10-13 12:33:18,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 278 transitions. [2024-10-13 12:33:18,680 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6435185185185185 [2024-10-13 12:33:18,680 INFO L175 Difference]: Start difference. First operand has 126 places, 126 transitions, 276 flow. Second operand 3 states and 278 transitions. [2024-10-13 12:33:18,680 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 128 places, 129 transitions, 408 flow [2024-10-13 12:33:18,682 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 126 places, 129 transitions, 400 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-10-13 12:33:18,686 INFO L231 Difference]: Finished difference. Result has 127 places, 127 transitions, 284 flow [2024-10-13 12:33:18,686 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=144, PETRI_DIFFERENCE_MINUEND_FLOW=272, PETRI_DIFFERENCE_MINUEND_PLACES=124, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=126, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=124, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=284, PETRI_PLACES=127, PETRI_TRANSITIONS=127} [2024-10-13 12:33:18,687 INFO L277 CegarLoopForPetriNet]: 129 programPoint places, -2 predicate places. [2024-10-13 12:33:18,687 INFO L471 AbstractCegarLoop]: Abstraction has has 127 places, 127 transitions, 284 flow [2024-10-13 12:33:18,687 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 73.0) internal successors, (219), 3 states have internal predecessors, (219), 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) [2024-10-13 12:33:18,688 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-13 12:33:18,688 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2024-10-13 12:33:18,688 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-10-13 12:33:18,688 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [t2_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t2_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t2_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 72 more)] === [2024-10-13 12:33:18,689 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 12:33:18,689 INFO L85 PathProgramCache]: Analyzing trace with hash 632838301, now seen corresponding path program 1 times [2024-10-13 12:33:18,689 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 12:33:18,689 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1946205466] [2024-10-13 12:33:18,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 12:33:18,689 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 12:33:18,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 12:33:18,798 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 12:33:18,798 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 12:33:18,799 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1946205466] [2024-10-13 12:33:18,799 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1946205466] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-13 12:33:18,799 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-13 12:33:18,799 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-10-13 12:33:18,799 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1999038969] [2024-10-13 12:33:18,799 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-13 12:33:18,800 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-10-13 12:33:18,800 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 12:33:18,800 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-10-13 12:33:18,801 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-10-13 12:33:18,902 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 68 out of 144 [2024-10-13 12:33:18,903 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 127 places, 127 transitions, 284 flow. Second operand has 5 states, 5 states have (on average 69.0) internal successors, (345), 5 states have internal predecessors, (345), 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) [2024-10-13 12:33:18,904 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-13 12:33:18,904 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 68 of 144 [2024-10-13 12:33:18,904 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-13 12:33:19,917 INFO L124 PetriNetUnfolderBase]: 4054/9541 cut-off events. [2024-10-13 12:33:19,917 INFO L125 PetriNetUnfolderBase]: For 156/156 co-relation queries the response was YES. [2024-10-13 12:33:19,931 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16298 conditions, 9541 events. 4054/9541 cut-off events. For 156/156 co-relation queries the response was YES. Maximal size of possible extension queue 274. Compared 83558 event pairs, 2177 based on Foata normal form. 2/8050 useless extension candidates. Maximal degree in co-relation 16278. Up to 3712 conditions per place. [2024-10-13 12:33:19,967 INFO L140 encePairwiseOnDemand]: 137/144 looper letters, 131 selfloop transitions, 4 changer transitions 0/199 dead transitions. [2024-10-13 12:33:19,967 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 129 places, 199 transitions, 698 flow [2024-10-13 12:33:19,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-10-13 12:33:19,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-10-13 12:33:19,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 411 transitions. [2024-10-13 12:33:19,970 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.7135416666666666 [2024-10-13 12:33:19,970 INFO L175 Difference]: Start difference. First operand has 127 places, 127 transitions, 284 flow. Second operand 4 states and 411 transitions. [2024-10-13 12:33:19,970 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 129 places, 199 transitions, 698 flow [2024-10-13 12:33:19,975 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 128 places, 199 transitions, 696 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-10-13 12:33:19,978 INFO L231 Difference]: Finished difference. Result has 131 places, 128 transitions, 312 flow [2024-10-13 12:33:19,982 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=144, PETRI_DIFFERENCE_MINUEND_FLOW=280, PETRI_DIFFERENCE_MINUEND_PLACES=125, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=126, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=122, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=312, PETRI_PLACES=131, PETRI_TRANSITIONS=128} [2024-10-13 12:33:19,983 INFO L277 CegarLoopForPetriNet]: 129 programPoint places, 2 predicate places. [2024-10-13 12:33:19,983 INFO L471 AbstractCegarLoop]: Abstraction has has 131 places, 128 transitions, 312 flow [2024-10-13 12:33:19,984 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 69.0) internal successors, (345), 5 states have internal predecessors, (345), 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) [2024-10-13 12:33:19,984 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-13 12:33:19,984 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2024-10-13 12:33:19,984 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-10-13 12:33:19,984 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [t2_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t2_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t2_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 72 more)] === [2024-10-13 12:33:19,984 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 12:33:19,985 INFO L85 PathProgramCache]: Analyzing trace with hash 632838302, now seen corresponding path program 1 times [2024-10-13 12:33:19,985 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 12:33:19,985 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1770305425] [2024-10-13 12:33:19,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 12:33:19,985 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 12:33:19,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 12:33:20,107 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 12:33:20,107 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 12:33:20,108 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1770305425] [2024-10-13 12:33:20,108 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1770305425] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-13 12:33:20,108 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-13 12:33:20,108 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-10-13 12:33:20,108 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [561253528] [2024-10-13 12:33:20,108 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-13 12:33:20,109 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-10-13 12:33:20,109 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 12:33:20,109 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-10-13 12:33:20,109 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-10-13 12:33:20,225 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 68 out of 144 [2024-10-13 12:33:20,226 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 131 places, 128 transitions, 312 flow. Second operand has 4 states, 4 states have (on average 69.0) internal successors, (276), 4 states have internal predecessors, (276), 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) [2024-10-13 12:33:20,226 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-13 12:33:20,227 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 68 of 144 [2024-10-13 12:33:20,227 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-13 12:33:21,047 INFO L124 PetriNetUnfolderBase]: 4084/9802 cut-off events. [2024-10-13 12:33:21,047 INFO L125 PetriNetUnfolderBase]: For 1608/1608 co-relation queries the response was YES. [2024-10-13 12:33:21,070 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17694 conditions, 9802 events. 4084/9802 cut-off events. For 1608/1608 co-relation queries the response was YES. Maximal size of possible extension queue 286. Compared 85869 event pairs, 3767 based on Foata normal form. 1/8406 useless extension candidates. Maximal degree in co-relation 17660. Up to 6645 conditions per place. [2024-10-13 12:33:21,197 INFO L140 encePairwiseOnDemand]: 141/144 looper letters, 64 selfloop transitions, 2 changer transitions 0/130 dead transitions. [2024-10-13 12:33:21,198 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 133 places, 130 transitions, 448 flow [2024-10-13 12:33:21,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-13 12:33:21,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-10-13 12:33:21,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 269 transitions. [2024-10-13 12:33:21,200 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6226851851851852 [2024-10-13 12:33:21,200 INFO L175 Difference]: Start difference. First operand has 131 places, 128 transitions, 312 flow. Second operand 3 states and 269 transitions. [2024-10-13 12:33:21,200 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 133 places, 130 transitions, 448 flow [2024-10-13 12:33:21,205 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 132 places, 130 transitions, 446 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-10-13 12:33:21,207 INFO L231 Difference]: Finished difference. Result has 133 places, 128 transitions, 318 flow [2024-10-13 12:33:21,207 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=144, PETRI_DIFFERENCE_MINUEND_FLOW=310, PETRI_DIFFERENCE_MINUEND_PLACES=130, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=128, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=126, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=318, PETRI_PLACES=133, PETRI_TRANSITIONS=128} [2024-10-13 12:33:21,208 INFO L277 CegarLoopForPetriNet]: 129 programPoint places, 4 predicate places. [2024-10-13 12:33:21,208 INFO L471 AbstractCegarLoop]: Abstraction has has 133 places, 128 transitions, 318 flow [2024-10-13 12:33:21,209 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 69.0) internal successors, (276), 4 states have internal predecessors, (276), 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) [2024-10-13 12:33:21,210 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-13 12:33:21,210 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 12:33:21,210 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-10-13 12:33:21,210 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [t2_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t2_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t2_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 72 more)] === [2024-10-13 12:33:21,211 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 12:33:21,211 INFO L85 PathProgramCache]: Analyzing trace with hash -2019939085, now seen corresponding path program 1 times [2024-10-13 12:33:21,211 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 12:33:21,212 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [666317442] [2024-10-13 12:33:21,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 12:33:21,212 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 12:33:21,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 12:33:21,267 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 12:33:21,268 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 12:33:21,268 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [666317442] [2024-10-13 12:33:21,268 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [666317442] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-13 12:33:21,268 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [671292063] [2024-10-13 12:33:21,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 12:33:21,269 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 12:33:21,269 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-13 12:33:21,272 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-13 12:33:21,274 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-10-13 12:33:21,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 12:33:21,383 INFO L255 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-10-13 12:33:21,387 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-13 12:33:21,420 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 12:33:21,420 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-13 12:33:21,440 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 12:33:21,441 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [671292063] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-13 12:33:21,441 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-13 12:33:21,441 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2024-10-13 12:33:21,441 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1106656167] [2024-10-13 12:33:21,441 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-13 12:33:21,442 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-10-13 12:33:21,442 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 12:33:21,442 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-10-13 12:33:21,443 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-10-13 12:33:21,449 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 72 out of 144 [2024-10-13 12:33:21,449 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 133 places, 128 transitions, 318 flow. Second operand has 7 states, 7 states have (on average 74.14285714285714) internal successors, (519), 7 states have internal predecessors, (519), 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) [2024-10-13 12:33:21,450 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-13 12:33:21,450 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 72 of 144 [2024-10-13 12:33:21,450 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-13 12:33:22,462 INFO L124 PetriNetUnfolderBase]: 3973/9582 cut-off events. [2024-10-13 12:33:22,463 INFO L125 PetriNetUnfolderBase]: For 999/1057 co-relation queries the response was YES. [2024-10-13 12:33:22,478 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17157 conditions, 9582 events. 3973/9582 cut-off events. For 999/1057 co-relation queries the response was YES. Maximal size of possible extension queue 276. Compared 83707 event pairs, 3660 based on Foata normal form. 3/8202 useless extension candidates. Maximal degree in co-relation 17132. Up to 6451 conditions per place. [2024-10-13 12:33:22,510 INFO L140 encePairwiseOnDemand]: 140/144 looper letters, 64 selfloop transitions, 6 changer transitions 0/137 dead transitions. [2024-10-13 12:33:22,511 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 138 places, 137 transitions, 480 flow [2024-10-13 12:33:22,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-10-13 12:33:22,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-10-13 12:33:22,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 503 transitions. [2024-10-13 12:33:22,512 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5821759259259259 [2024-10-13 12:33:22,513 INFO L175 Difference]: Start difference. First operand has 133 places, 128 transitions, 318 flow. Second operand 6 states and 503 transitions. [2024-10-13 12:33:22,513 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 138 places, 137 transitions, 480 flow [2024-10-13 12:33:22,515 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 136 places, 137 transitions, 476 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-10-13 12:33:22,517 INFO L231 Difference]: Finished difference. Result has 140 places, 131 transitions, 354 flow [2024-10-13 12:33:22,517 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=144, PETRI_DIFFERENCE_MINUEND_FLOW=314, PETRI_DIFFERENCE_MINUEND_PLACES=131, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=128, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=124, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=354, PETRI_PLACES=140, PETRI_TRANSITIONS=131} [2024-10-13 12:33:22,518 INFO L277 CegarLoopForPetriNet]: 129 programPoint places, 11 predicate places. [2024-10-13 12:33:22,518 INFO L471 AbstractCegarLoop]: Abstraction has has 140 places, 131 transitions, 354 flow [2024-10-13 12:33:22,518 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 74.14285714285714) internal successors, (519), 7 states have internal predecessors, (519), 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) [2024-10-13 12:33:22,518 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-13 12:33:22,518 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1] [2024-10-13 12:33:22,533 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2024-10-13 12:33:22,722 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2024-10-13 12:33:22,723 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [t2_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t2_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t2_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 72 more)] === [2024-10-13 12:33:22,723 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 12:33:22,723 INFO L85 PathProgramCache]: Analyzing trace with hash 1806318500, now seen corresponding path program 1 times [2024-10-13 12:33:22,723 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 12:33:22,723 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [998590698] [2024-10-13 12:33:22,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 12:33:22,724 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 12:33:22,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 12:33:22,930 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 12:33:22,930 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 12:33:22,930 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [998590698] [2024-10-13 12:33:22,930 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [998590698] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-13 12:33:22,931 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1489305658] [2024-10-13 12:33:22,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 12:33:22,931 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 12:33:22,931 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-13 12:33:22,933 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-13 12:33:22,934 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-10-13 12:33:23,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 12:33:23,036 INFO L255 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 28 conjuncts are in the unsatisfiable core [2024-10-13 12:33:23,037 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-13 12:33:23,094 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-10-13 12:33:23,100 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 [2024-10-13 12:33:23,164 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-10-13 12:33:23,166 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 [2024-10-13 12:33:23,205 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 12:33:23,206 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-13 12:33:23,345 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-13 12:33:23,345 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 [2024-10-13 12:33:23,454 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 12:33:23,455 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1489305658] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-13 12:33:23,455 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-13 12:33:23,455 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 12 [2024-10-13 12:33:23,455 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1898474636] [2024-10-13 12:33:23,455 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-13 12:33:23,456 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-10-13 12:33:23,456 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 12:33:23,456 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-10-13 12:33:23,457 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=127, Unknown=0, NotChecked=0, Total=182 [2024-10-13 12:33:24,752 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 68 out of 144 [2024-10-13 12:33:24,754 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 140 places, 131 transitions, 354 flow. Second operand has 14 states, 14 states have (on average 69.5) internal successors, (973), 14 states have internal predecessors, (973), 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) [2024-10-13 12:33:24,754 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-13 12:33:24,754 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 68 of 144 [2024-10-13 12:33:24,754 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-13 12:33:25,873 INFO L124 PetriNetUnfolderBase]: 4084/9814 cut-off events. [2024-10-13 12:33:25,873 INFO L125 PetriNetUnfolderBase]: For 1104/1104 co-relation queries the response was YES. [2024-10-13 12:33:25,905 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17744 conditions, 9814 events. 4084/9814 cut-off events. For 1104/1104 co-relation queries the response was YES. Maximal size of possible extension queue 286. Compared 85908 event pairs, 3767 based on Foata normal form. 3/8420 useless extension candidates. Maximal degree in co-relation 17711. Up to 6645 conditions per place. [2024-10-13 12:33:25,957 INFO L140 encePairwiseOnDemand]: 141/144 looper letters, 70 selfloop transitions, 5 changer transitions 0/139 dead transitions. [2024-10-13 12:33:25,957 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 145 places, 139 transitions, 532 flow [2024-10-13 12:33:25,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-10-13 12:33:25,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-10-13 12:33:25,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 484 transitions. [2024-10-13 12:33:25,963 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5601851851851852 [2024-10-13 12:33:25,963 INFO L175 Difference]: Start difference. First operand has 140 places, 131 transitions, 354 flow. Second operand 6 states and 484 transitions. [2024-10-13 12:33:25,963 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 145 places, 139 transitions, 532 flow [2024-10-13 12:33:25,966 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 144 places, 139 transitions, 522 flow, removed 4 selfloop flow, removed 1 redundant places. [2024-10-13 12:33:25,968 INFO L231 Difference]: Finished difference. Result has 147 places, 132 transitions, 376 flow [2024-10-13 12:33:25,968 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=144, PETRI_DIFFERENCE_MINUEND_FLOW=346, PETRI_DIFFERENCE_MINUEND_PLACES=139, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=131, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=126, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=376, PETRI_PLACES=147, PETRI_TRANSITIONS=132} [2024-10-13 12:33:25,969 INFO L277 CegarLoopForPetriNet]: 129 programPoint places, 18 predicate places. [2024-10-13 12:33:25,970 INFO L471 AbstractCegarLoop]: Abstraction has has 147 places, 132 transitions, 376 flow [2024-10-13 12:33:25,972 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 69.5) internal successors, (973), 14 states have internal predecessors, (973), 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) [2024-10-13 12:33:25,972 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-13 12:33:25,972 INFO L204 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1] [2024-10-13 12:33:25,987 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-10-13 12:33:26,174 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2024-10-13 12:33:26,175 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [t2_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t2_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t2_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 72 more)] === [2024-10-13 12:33:26,175 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 12:33:26,175 INFO L85 PathProgramCache]: Analyzing trace with hash -2022175839, now seen corresponding path program 2 times [2024-10-13 12:33:26,175 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 12:33:26,176 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [925001740] [2024-10-13 12:33:26,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 12:33:26,176 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 12:33:26,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 12:33:26,294 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2024-10-13 12:33:26,295 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 12:33:26,296 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [925001740] [2024-10-13 12:33:26,296 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [925001740] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-13 12:33:26,296 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-13 12:33:26,296 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-10-13 12:33:26,297 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [420899516] [2024-10-13 12:33:26,297 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-13 12:33:26,298 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-13 12:33:26,298 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 12:33:26,298 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-13 12:33:26,298 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-13 12:33:26,344 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 68 out of 144 [2024-10-13 12:33:26,344 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 147 places, 132 transitions, 376 flow. Second operand has 3 states, 3 states have (on average 70.33333333333333) internal successors, (211), 3 states have internal predecessors, (211), 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) [2024-10-13 12:33:26,344 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-13 12:33:26,344 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 68 of 144 [2024-10-13 12:33:26,345 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-13 12:33:27,236 INFO L124 PetriNetUnfolderBase]: 4432/10447 cut-off events. [2024-10-13 12:33:27,237 INFO L125 PetriNetUnfolderBase]: For 929/929 co-relation queries the response was YES. [2024-10-13 12:33:27,265 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18912 conditions, 10447 events. 4432/10447 cut-off events. For 929/929 co-relation queries the response was YES. Maximal size of possible extension queue 305. Compared 93420 event pairs, 2895 based on Foata normal form. 0/8958 useless extension candidates. Maximal degree in co-relation 18872. Up to 4460 conditions per place. [2024-10-13 12:33:27,304 INFO L140 encePairwiseOnDemand]: 140/144 looper letters, 101 selfloop transitions, 2 changer transitions 0/166 dead transitions. [2024-10-13 12:33:27,305 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 147 places, 166 transitions, 654 flow [2024-10-13 12:33:27,305 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-13 12:33:27,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-10-13 12:33:27,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 302 transitions. [2024-10-13 12:33:27,306 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6990740740740741 [2024-10-13 12:33:27,306 INFO L175 Difference]: Start difference. First operand has 147 places, 132 transitions, 376 flow. Second operand 3 states and 302 transitions. [2024-10-13 12:33:27,306 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 147 places, 166 transitions, 654 flow [2024-10-13 12:33:27,310 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 143 places, 166 transitions, 646 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-10-13 12:33:27,311 INFO L231 Difference]: Finished difference. Result has 143 places, 130 transitions, 368 flow [2024-10-13 12:33:27,312 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=144, PETRI_DIFFERENCE_MINUEND_FLOW=364, PETRI_DIFFERENCE_MINUEND_PLACES=141, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=130, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=128, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=368, PETRI_PLACES=143, PETRI_TRANSITIONS=130} [2024-10-13 12:33:27,312 INFO L277 CegarLoopForPetriNet]: 129 programPoint places, 14 predicate places. [2024-10-13 12:33:27,312 INFO L471 AbstractCegarLoop]: Abstraction has has 143 places, 130 transitions, 368 flow [2024-10-13 12:33:27,313 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 70.33333333333333) internal successors, (211), 3 states have internal predecessors, (211), 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) [2024-10-13 12:33:27,313 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-13 12:33:27,313 INFO L204 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1] [2024-10-13 12:33:27,313 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-10-13 12:33:27,313 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [t2_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t2_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t2_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 72 more)] === [2024-10-13 12:33:27,313 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 12:33:27,314 INFO L85 PathProgramCache]: Analyzing trace with hash -2022175838, now seen corresponding path program 1 times [2024-10-13 12:33:27,314 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 12:33:27,314 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [815039366] [2024-10-13 12:33:27,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 12:33:27,314 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 12:33:27,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 12:33:27,454 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 12:33:27,455 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 12:33:27,455 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [815039366] [2024-10-13 12:33:27,455 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [815039366] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-13 12:33:27,455 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [149166844] [2024-10-13 12:33:27,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 12:33:27,455 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 12:33:27,456 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-13 12:33:27,457 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-13 12:33:27,459 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-10-13 12:33:27,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 12:33:27,598 INFO L255 TraceCheckSpWp]: Trace formula consists of 399 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-10-13 12:33:27,600 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-13 12:33:27,632 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 12:33:27,633 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-13 12:33:27,686 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 12:33:27,686 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [149166844] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-13 12:33:27,687 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-13 12:33:27,687 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2024-10-13 12:33:27,687 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1500892215] [2024-10-13 12:33:27,687 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-13 12:33:27,687 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-10-13 12:33:27,688 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 12:33:27,688 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-10-13 12:33:27,688 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2024-10-13 12:33:27,698 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 72 out of 144 [2024-10-13 12:33:27,699 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 143 places, 130 transitions, 368 flow. Second operand has 13 states, 13 states have (on average 74.53846153846153) internal successors, (969), 13 states have internal predecessors, (969), 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) [2024-10-13 12:33:27,699 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-13 12:33:27,699 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 72 of 144 [2024-10-13 12:33:27,699 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-13 12:33:28,686 INFO L124 PetriNetUnfolderBase]: 3973/9593 cut-off events. [2024-10-13 12:33:28,686 INFO L125 PetriNetUnfolderBase]: For 1626/1684 co-relation queries the response was YES. [2024-10-13 12:33:28,704 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17531 conditions, 9593 events. 3973/9593 cut-off events. For 1626/1684 co-relation queries the response was YES. Maximal size of possible extension queue 277. Compared 83515 event pairs, 3660 based on Foata normal form. 6/8232 useless extension candidates. Maximal degree in co-relation 17468. Up to 6451 conditions per place. [2024-10-13 12:33:28,738 INFO L140 encePairwiseOnDemand]: 140/144 looper letters, 76 selfloop transitions, 12 changer transitions 0/153 dead transitions. [2024-10-13 12:33:28,739 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 154 places, 153 transitions, 650 flow [2024-10-13 12:33:28,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-10-13 12:33:28,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-10-13 12:33:28,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 956 transitions. [2024-10-13 12:33:28,745 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5532407407407407 [2024-10-13 12:33:28,745 INFO L175 Difference]: Start difference. First operand has 143 places, 130 transitions, 368 flow. Second operand 12 states and 956 transitions. [2024-10-13 12:33:28,745 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 154 places, 153 transitions, 650 flow [2024-10-13 12:33:28,748 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 152 places, 153 transitions, 646 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-10-13 12:33:28,750 INFO L231 Difference]: Finished difference. Result has 159 places, 136 transitions, 464 flow [2024-10-13 12:33:28,750 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=144, PETRI_DIFFERENCE_MINUEND_FLOW=364, PETRI_DIFFERENCE_MINUEND_PLACES=141, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=130, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=123, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=464, PETRI_PLACES=159, PETRI_TRANSITIONS=136} [2024-10-13 12:33:28,751 INFO L277 CegarLoopForPetriNet]: 129 programPoint places, 30 predicate places. [2024-10-13 12:33:28,751 INFO L471 AbstractCegarLoop]: Abstraction has has 159 places, 136 transitions, 464 flow [2024-10-13 12:33:28,752 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 74.53846153846153) internal successors, (969), 13 states have internal predecessors, (969), 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) [2024-10-13 12:33:28,752 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-13 12:33:28,752 INFO L204 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 4, 1, 1] [2024-10-13 12:33:28,769 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-10-13 12:33:28,952 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 12:33:28,953 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [t2_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t2_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t2_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 72 more)] === [2024-10-13 12:33:28,953 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 12:33:28,954 INFO L85 PathProgramCache]: Analyzing trace with hash 1736979126, now seen corresponding path program 2 times [2024-10-13 12:33:28,954 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 12:33:28,954 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1176964583] [2024-10-13 12:33:28,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 12:33:28,954 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 12:33:29,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 12:33:29,768 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 12:33:29,769 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 12:33:29,769 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1176964583] [2024-10-13 12:33:29,769 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1176964583] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-13 12:33:29,769 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2110728237] [2024-10-13 12:33:29,772 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-13 12:33:29,772 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 12:33:29,772 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-13 12:33:29,774 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-13 12:33:29,775 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-10-13 12:33:29,945 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-13 12:33:29,945 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-13 12:33:29,948 INFO L255 TraceCheckSpWp]: Trace formula consists of 436 conjuncts, 57 conjuncts are in the unsatisfiable core [2024-10-13 12:33:29,952 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-13 12:33:30,001 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-10-13 12:33:30,002 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 [2024-10-13 12:33:30,083 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-10-13 12:33:30,085 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 [2024-10-13 12:33:30,182 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-10-13 12:33:30,183 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 [2024-10-13 12:33:30,269 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-10-13 12:33:30,270 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 [2024-10-13 12:33:30,367 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-10-13 12:33:30,368 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 [2024-10-13 12:33:30,413 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 12:33:30,414 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-13 12:33:30,534 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-13 12:33:30,535 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 [2024-10-13 12:33:30,671 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-13 12:33:30,672 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 [2024-10-13 12:33:30,850 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-13 12:33:30,851 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 [2024-10-13 12:33:31,031 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-13 12:33:31,031 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 [2024-10-13 12:33:31,189 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 12:33:31,189 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2110728237] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-13 12:33:31,189 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-13 12:33:31,189 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10, 10] total 29 [2024-10-13 12:33:31,189 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1702146357] [2024-10-13 12:33:31,189 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-13 12:33:31,190 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2024-10-13 12:33:31,190 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 12:33:31,191 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2024-10-13 12:33:31,191 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=759, Unknown=0, NotChecked=0, Total=930 [2024-10-13 12:33:37,639 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 68 out of 144 [2024-10-13 12:33:37,645 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 159 places, 136 transitions, 464 flow. Second operand has 31 states, 31 states have (on average 69.54838709677419) internal successors, (2156), 31 states have internal predecessors, (2156), 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) [2024-10-13 12:33:37,645 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-13 12:33:37,645 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 68 of 144 [2024-10-13 12:33:37,645 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-13 12:33:39,831 INFO L124 PetriNetUnfolderBase]: 4084/9822 cut-off events. [2024-10-13 12:33:39,831 INFO L125 PetriNetUnfolderBase]: For 1256/1256 co-relation queries the response was YES. [2024-10-13 12:33:39,850 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17847 conditions, 9822 events. 4084/9822 cut-off events. For 1256/1256 co-relation queries the response was YES. Maximal size of possible extension queue 286. Compared 85694 event pairs, 3767 based on Foata normal form. 6/8447 useless extension candidates. Maximal degree in co-relation 17799. Up to 6645 conditions per place. [2024-10-13 12:33:39,879 INFO L140 encePairwiseOnDemand]: 140/144 looper letters, 81 selfloop transitions, 12 changer transitions 0/155 dead transitions. [2024-10-13 12:33:39,879 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 171 places, 155 transitions, 734 flow [2024-10-13 12:33:39,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-10-13 12:33:39,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-10-13 12:33:39,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 981 transitions. [2024-10-13 12:33:39,889 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5240384615384616 [2024-10-13 12:33:39,889 INFO L175 Difference]: Start difference. First operand has 159 places, 136 transitions, 464 flow. Second operand 13 states and 981 transitions. [2024-10-13 12:33:39,889 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 171 places, 155 transitions, 734 flow [2024-10-13 12:33:39,894 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 167 places, 155 transitions, 716 flow, removed 5 selfloop flow, removed 4 redundant places. [2024-10-13 12:33:39,896 INFO L231 Difference]: Finished difference. Result has 174 places, 138 transitions, 516 flow [2024-10-13 12:33:39,897 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=144, PETRI_DIFFERENCE_MINUEND_FLOW=446, PETRI_DIFFERENCE_MINUEND_PLACES=155, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=136, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=124, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=516, PETRI_PLACES=174, PETRI_TRANSITIONS=138} [2024-10-13 12:33:39,897 INFO L277 CegarLoopForPetriNet]: 129 programPoint places, 45 predicate places. [2024-10-13 12:33:39,898 INFO L471 AbstractCegarLoop]: Abstraction has has 174 places, 138 transitions, 516 flow [2024-10-13 12:33:39,898 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 69.54838709677419) internal successors, (2156), 31 states have internal predecessors, (2156), 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) [2024-10-13 12:33:39,898 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-13 12:33:39,899 INFO L204 CegarLoopForPetriNet]: trace histogram [10, 10, 10, 10, 1, 1, 1, 1] [2024-10-13 12:33:39,913 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-10-13 12:33:40,099 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 12:33:40,099 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [t2_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t2_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t2_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 72 more)] === [2024-10-13 12:33:40,100 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 12:33:40,100 INFO L85 PathProgramCache]: Analyzing trace with hash -1795192322, now seen corresponding path program 2 times [2024-10-13 12:33:40,100 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 12:33:40,100 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2049231279] [2024-10-13 12:33:40,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 12:33:40,102 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 12:33:40,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 12:33:40,445 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 0 proven. 190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 12:33:40,446 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 12:33:40,446 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2049231279] [2024-10-13 12:33:40,446 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2049231279] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-13 12:33:40,446 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1308679514] [2024-10-13 12:33:40,446 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-13 12:33:40,446 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 12:33:40,446 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-13 12:33:40,448 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-13 12:33:40,449 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-10-13 12:33:40,590 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-10-13 12:33:40,590 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-13 12:33:40,592 INFO L255 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-10-13 12:33:40,593 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-13 12:33:40,607 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2024-10-13 12:33:40,626 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 190 trivial. 0 not checked. [2024-10-13 12:33:40,626 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-13 12:33:40,626 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1308679514] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-13 12:33:40,626 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-10-13 12:33:40,626 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [12] total 14 [2024-10-13 12:33:40,627 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1274439884] [2024-10-13 12:33:40,627 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-13 12:33:40,627 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-13 12:33:40,627 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 12:33:40,628 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-13 12:33:40,628 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2024-10-13 12:33:40,672 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 71 out of 144 [2024-10-13 12:33:40,673 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 174 places, 138 transitions, 516 flow. Second operand has 3 states, 3 states have (on average 73.33333333333333) internal successors, (220), 3 states have internal predecessors, (220), 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) [2024-10-13 12:33:40,673 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-13 12:33:40,673 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 71 of 144 [2024-10-13 12:33:40,673 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-13 12:33:41,499 INFO L124 PetriNetUnfolderBase]: 3888/9254 cut-off events. [2024-10-13 12:33:41,499 INFO L125 PetriNetUnfolderBase]: For 1215/1273 co-relation queries the response was YES. [2024-10-13 12:33:41,534 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16813 conditions, 9254 events. 3888/9254 cut-off events. For 1215/1273 co-relation queries the response was YES. Maximal size of possible extension queue 281. Compared 79579 event pairs, 3343 based on Foata normal form. 1/8060 useless extension candidates. Maximal degree in co-relation 16751. Up to 6318 conditions per place. [2024-10-13 12:33:41,568 INFO L140 encePairwiseOnDemand]: 139/144 looper letters, 74 selfloop transitions, 3 changer transitions 0/141 dead transitions. [2024-10-13 12:33:41,569 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 176 places, 141 transitions, 676 flow [2024-10-13 12:33:41,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-13 12:33:41,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-10-13 12:33:41,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 277 transitions. [2024-10-13 12:33:41,570 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6412037037037037 [2024-10-13 12:33:41,570 INFO L175 Difference]: Start difference. First operand has 174 places, 138 transitions, 516 flow. Second operand 3 states and 277 transitions. [2024-10-13 12:33:41,570 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 176 places, 141 transitions, 676 flow [2024-10-13 12:33:41,578 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 166 places, 141 transitions, 652 flow, removed 2 selfloop flow, removed 10 redundant places. [2024-10-13 12:33:41,579 INFO L231 Difference]: Finished difference. Result has 167 places, 140 transitions, 513 flow [2024-10-13 12:33:41,579 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=144, PETRI_DIFFERENCE_MINUEND_FLOW=492, PETRI_DIFFERENCE_MINUEND_PLACES=164, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=138, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=135, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=513, PETRI_PLACES=167, PETRI_TRANSITIONS=140} [2024-10-13 12:33:41,580 INFO L277 CegarLoopForPetriNet]: 129 programPoint places, 38 predicate places. [2024-10-13 12:33:41,580 INFO L471 AbstractCegarLoop]: Abstraction has has 167 places, 140 transitions, 513 flow [2024-10-13 12:33:41,580 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 73.33333333333333) internal successors, (220), 3 states have internal predecessors, (220), 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) [2024-10-13 12:33:41,580 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-13 12:33:41,581 INFO L204 CegarLoopForPetriNet]: trace histogram [11, 11, 11, 10, 1, 1] [2024-10-13 12:33:41,595 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2024-10-13 12:33:41,781 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2024-10-13 12:33:41,781 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [t2_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t2_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t2_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 72 more)] === [2024-10-13 12:33:41,782 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 12:33:41,782 INFO L85 PathProgramCache]: Analyzing trace with hash 183533530, now seen corresponding path program 3 times [2024-10-13 12:33:41,782 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 12:33:41,782 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [812098951] [2024-10-13 12:33:41,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 12:33:41,782 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 12:33:41,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 12:33:43,877 INFO L134 CoverageAnalysis]: Checked inductivity of 220 backedges. 0 proven. 220 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 12:33:43,877 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 12:33:43,877 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [812098951] [2024-10-13 12:33:43,877 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [812098951] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-13 12:33:43,877 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [779690385] [2024-10-13 12:33:43,878 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-10-13 12:33:43,878 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 12:33:43,878 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-13 12:33:43,880 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-13 12:33:43,881 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process