./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_82-list_racefree.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_82-list_racefree.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 6ac894f5c6207d1329786eb676509b79ca36f8c33f880cc59ffa30652ab92765 --- Real Ultimate output --- This is Ultimate 0.2.5-tmp.dk.eval-mul-div-a046e57-m [2024-10-13 12:33:02,485 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-10-13 12:33:02,554 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2024-10-13 12:33:02,560 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-10-13 12:33:02,560 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-10-13 12:33:02,600 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-10-13 12:33:02,601 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-10-13 12:33:02,601 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-10-13 12:33:02,602 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-10-13 12:33:02,604 INFO L153 SettingsManager]: * Use memory slicer=true [2024-10-13 12:33:02,613 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-10-13 12:33:02,614 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-10-13 12:33:02,615 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-10-13 12:33:02,617 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-10-13 12:33:02,618 INFO L153 SettingsManager]: * Use SBE=true [2024-10-13 12:33:02,618 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-10-13 12:33:02,618 INFO L153 SettingsManager]: * sizeof long=4 [2024-10-13 12:33:02,619 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-10-13 12:33:02,619 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-10-13 12:33:02,619 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-10-13 12:33:02,620 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2024-10-13 12:33:02,623 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2024-10-13 12:33:02,624 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2024-10-13 12:33:02,624 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-10-13 12:33:02,624 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-10-13 12:33:02,624 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-10-13 12:33:02,625 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2024-10-13 12:33:02,625 INFO L153 SettingsManager]: * sizeof long double=12 [2024-10-13 12:33:02,625 INFO L153 SettingsManager]: * Use constant arrays=true [2024-10-13 12:33:02,626 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-10-13 12:33:02,626 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-10-13 12:33:02,626 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-10-13 12:33:02,626 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-10-13 12:33:02,626 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-13 12:33:02,627 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-10-13 12:33:02,627 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-10-13 12:33:02,627 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-10-13 12:33:02,628 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-10-13 12:33:02,628 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-10-13 12:33:02,628 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-10-13 12:33:02,628 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-10-13 12:33:02,629 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-10-13 12:33:02,630 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 6ac894f5c6207d1329786eb676509b79ca36f8c33f880cc59ffa30652ab92765 [2024-10-13 12:33:02,882 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-10-13 12:33:02,910 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-10-13 12:33:02,915 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-10-13 12:33:02,916 INFO L270 PluginConnector]: Initializing CDTParser... [2024-10-13 12:33:02,917 INFO L274 PluginConnector]: CDTParser initialized [2024-10-13 12:33:02,918 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/goblint-regression/28-race_reach_82-list_racefree.i [2024-10-13 12:33:04,375 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-10-13 12:33:04,660 INFO L384 CDTParser]: Found 1 translation units. [2024-10-13 12:33:04,663 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/goblint-regression/28-race_reach_82-list_racefree.i [2024-10-13 12:33:04,693 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5f83e4d48/ff4d3d7a79124e54bfc712660844df42/FLAGd59256d66 [2024-10-13 12:33:04,711 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5f83e4d48/ff4d3d7a79124e54bfc712660844df42 [2024-10-13 12:33:04,714 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-10-13 12:33:04,716 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-10-13 12:33:04,717 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-10-13 12:33:04,718 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-10-13 12:33:04,724 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-10-13 12:33:04,725 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 12:33:04" (1/1) ... [2024-10-13 12:33:04,726 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6e2c90af and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 12:33:04, skipping insertion in model container [2024-10-13 12:33:04,726 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 12:33:04" (1/1) ... [2024-10-13 12:33:04,778 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-10-13 12:33:05,210 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-13 12:33:05,224 INFO L200 MainTranslator]: Completed pre-run [2024-10-13 12:33:05,290 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-13 12:33:05,348 INFO L204 MainTranslator]: Completed translation [2024-10-13 12:33:05,349 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 12:33:05 WrapperNode [2024-10-13 12:33:05,349 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-10-13 12:33:05,350 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-10-13 12:33:05,350 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-10-13 12:33:05,350 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-10-13 12:33:05,357 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 12:33:05" (1/1) ... [2024-10-13 12:33:05,379 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 12:33:05" (1/1) ... [2024-10-13 12:33:05,414 INFO L138 Inliner]: procedures = 279, calls = 68, calls flagged for inlining = 8, calls inlined = 8, statements flattened = 224 [2024-10-13 12:33:05,415 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-10-13 12:33:05,416 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-10-13 12:33:05,416 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-10-13 12:33:05,416 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-10-13 12:33:05,425 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 12:33:05" (1/1) ... [2024-10-13 12:33:05,425 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 12:33:05" (1/1) ... [2024-10-13 12:33:05,430 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 12:33:05" (1/1) ... [2024-10-13 12:33:05,456 INFO L175 MemorySlicer]: Split 35 memory accesses to 7 slices as follows [2, 5, 5, 5, 2, 14, 2]. 40 percent of accesses are in the largest equivalence class. The 17 initializations are split as follows [2, 5, 5, 5, 0, 0, 0]. The 10 writes are split as follows [0, 0, 0, 0, 1, 8, 1]. [2024-10-13 12:33:05,456 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 12:33:05" (1/1) ... [2024-10-13 12:33:05,456 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 12:33:05" (1/1) ... [2024-10-13 12:33:05,468 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 12:33:05" (1/1) ... [2024-10-13 12:33:05,474 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 12:33:05" (1/1) ... [2024-10-13 12:33:05,483 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 12:33:05" (1/1) ... [2024-10-13 12:33:05,486 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 12:33:05" (1/1) ... [2024-10-13 12:33:05,492 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-10-13 12:33:05,493 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-10-13 12:33:05,493 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-10-13 12:33:05,493 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-10-13 12:33:05,494 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 12:33:05" (1/1) ... [2024-10-13 12:33:05,503 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-13 12:33:05,516 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-13 12:33:05,541 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 12:33:05,545 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 12:33:05,595 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-10-13 12:33:05,596 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#0 [2024-10-13 12:33:05,596 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#1 [2024-10-13 12:33:05,596 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#2 [2024-10-13 12:33:05,596 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#3 [2024-10-13 12:33:05,597 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#4 [2024-10-13 12:33:05,597 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#5 [2024-10-13 12:33:05,597 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#6 [2024-10-13 12:33:05,597 INFO L130 BoogieDeclarations]: Found specification of procedure t1_fun [2024-10-13 12:33:05,597 INFO L138 BoogieDeclarations]: Found implementation of procedure t1_fun [2024-10-13 12:33:05,597 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-10-13 12:33:05,599 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexUnlock [2024-10-13 12:33:05,599 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-10-13 12:33:05,600 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-10-13 12:33:05,600 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2024-10-13 12:33:05,600 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#3 [2024-10-13 12:33:05,600 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#4 [2024-10-13 12:33:05,600 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#5 [2024-10-13 12:33:05,600 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#6 [2024-10-13 12:33:05,600 INFO L130 BoogieDeclarations]: Found specification of procedure t2_fun [2024-10-13 12:33:05,600 INFO L138 BoogieDeclarations]: Found implementation of procedure t2_fun [2024-10-13 12:33:05,600 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-10-13 12:33:05,601 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-10-13 12:33:05,601 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2024-10-13 12:33:05,601 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2024-10-13 12:33:05,601 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#4 [2024-10-13 12:33:05,601 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#5 [2024-10-13 12:33:05,603 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#6 [2024-10-13 12:33:05,603 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2024-10-13 12:33:05,603 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-10-13 12:33:05,603 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-10-13 12:33:05,603 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#0 [2024-10-13 12:33:05,604 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#1 [2024-10-13 12:33:05,604 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#2 [2024-10-13 12:33:05,604 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#3 [2024-10-13 12:33:05,604 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#4 [2024-10-13 12:33:05,604 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#5 [2024-10-13 12:33:05,605 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#6 [2024-10-13 12:33:05,605 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-10-13 12:33:05,605 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-10-13 12:33:05,605 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-10-13 12:33:05,606 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2024-10-13 12:33:05,606 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#4 [2024-10-13 12:33:05,606 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#5 [2024-10-13 12:33:05,606 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#6 [2024-10-13 12:33:05,606 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-10-13 12:33:05,607 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-10-13 12:33:05,609 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 12:33:05,805 INFO L238 CfgBuilder]: Building ICFG [2024-10-13 12:33:05,807 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-10-13 12:33:06,216 INFO L283 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-10-13 12:33:06,216 INFO L287 CfgBuilder]: Performing block encoding [2024-10-13 12:33:06,442 INFO L309 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-10-13 12:33:06,443 INFO L314 CfgBuilder]: Removed 15 assume(true) statements. [2024-10-13 12:33:06,443 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 12:33:06 BoogieIcfgContainer [2024-10-13 12:33:06,444 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-10-13 12:33:06,446 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-10-13 12:33:06,446 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-10-13 12:33:06,450 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-10-13 12:33:06,450 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 12:33:04" (1/3) ... [2024-10-13 12:33:06,451 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@193fda47 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 12:33:06, skipping insertion in model container [2024-10-13 12:33:06,451 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 12:33:05" (2/3) ... [2024-10-13 12:33:06,452 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@193fda47 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 12:33:06, skipping insertion in model container [2024-10-13 12:33:06,452 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 12:33:06" (3/3) ... [2024-10-13 12:33:06,453 INFO L112 eAbstractionObserver]: Analyzing ICFG 28-race_reach_82-list_racefree.i [2024-10-13 12:33:06,470 INFO L209 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-10-13 12:33:06,471 INFO L149 ceAbstractionStarter]: Applying trace abstraction to program that has 38 error locations. [2024-10-13 12:33:06,471 INFO L484 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-10-13 12:33:06,557 INFO L143 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2024-10-13 12:33:06,596 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 119 places, 133 transitions, 286 flow [2024-10-13 12:33:06,670 INFO L124 PetriNetUnfolderBase]: 38/272 cut-off events. [2024-10-13 12:33:06,671 INFO L125 PetriNetUnfolderBase]: For 8/8 co-relation queries the response was YES. [2024-10-13 12:33:06,676 INFO L83 FinitePrefix]: Finished finitePrefix Result has 289 conditions, 272 events. 38/272 cut-off events. For 8/8 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 1387 event pairs, 0 based on Foata normal form. 0/150 useless extension candidates. Maximal degree in co-relation 143. Up to 8 conditions per place. [2024-10-13 12:33:06,677 INFO L82 GeneralOperation]: Start removeDead. Operand has 119 places, 133 transitions, 286 flow [2024-10-13 12:33:06,684 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 119 places, 133 transitions, 286 flow [2024-10-13 12:33:06,692 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-10-13 12:33:06,700 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;@626f0660, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-10-13 12:33:06,701 INFO L334 AbstractCegarLoop]: Starting to check reachability of 65 error locations. [2024-10-13 12:33:06,704 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-10-13 12:33:06,704 INFO L124 PetriNetUnfolderBase]: 0/2 cut-off events. [2024-10-13 12:33:06,704 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-10-13 12:33:06,704 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-13 12:33:06,705 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1] [2024-10-13 12:33:06,705 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [t2_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t2_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t2_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 62 more)] === [2024-10-13 12:33:06,710 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 12:33:06,710 INFO L85 PathProgramCache]: Analyzing trace with hash 19196, now seen corresponding path program 1 times [2024-10-13 12:33:06,720 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 12:33:06,720 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1917200090] [2024-10-13 12:33:06,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 12:33:06,721 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 12:33:06,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 12:33:07,045 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 12:33:07,045 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 12:33:07,046 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1917200090] [2024-10-13 12:33:07,046 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1917200090] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-13 12:33:07,046 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-13 12:33:07,046 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-10-13 12:33:07,048 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1440777348] [2024-10-13 12:33:07,049 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-13 12:33:07,057 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-13 12:33:07,061 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 12:33:07,085 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-13 12:33:07,086 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-13 12:33:07,172 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 63 out of 133 [2024-10-13 12:33:07,175 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 119 places, 133 transitions, 286 flow. Second operand has 3 states, 3 states have (on average 63.666666666666664) internal successors, (191), 3 states have internal predecessors, (191), 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 12:33:07,176 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-13 12:33:07,176 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 63 of 133 [2024-10-13 12:33:07,177 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-13 12:33:08,168 INFO L124 PetriNetUnfolderBase]: 2776/6503 cut-off events. [2024-10-13 12:33:08,169 INFO L125 PetriNetUnfolderBase]: For 151/151 co-relation queries the response was YES. [2024-10-13 12:33:08,187 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11030 conditions, 6503 events. 2776/6503 cut-off events. For 151/151 co-relation queries the response was YES. Maximal size of possible extension queue 191. Compared 52197 event pairs, 2586 based on Foata normal form. 464/5986 useless extension candidates. Maximal degree in co-relation 9591. Up to 4430 conditions per place. [2024-10-13 12:33:08,223 INFO L140 encePairwiseOnDemand]: 116/133 looper letters, 52 selfloop transitions, 2 changer transitions 0/117 dead transitions. [2024-10-13 12:33:08,224 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 118 places, 117 transitions, 362 flow [2024-10-13 12:33:08,225 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-13 12:33:08,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-10-13 12:33:08,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 258 transitions. [2024-10-13 12:33:08,239 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6466165413533834 [2024-10-13 12:33:08,240 INFO L175 Difference]: Start difference. First operand has 119 places, 133 transitions, 286 flow. Second operand 3 states and 258 transitions. [2024-10-13 12:33:08,241 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 118 places, 117 transitions, 362 flow [2024-10-13 12:33:08,251 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 118 places, 117 transitions, 362 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-10-13 12:33:08,254 INFO L231 Difference]: Finished difference. Result has 118 places, 117 transitions, 258 flow [2024-10-13 12:33:08,256 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=133, PETRI_DIFFERENCE_MINUEND_FLOW=254, PETRI_DIFFERENCE_MINUEND_PLACES=116, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=117, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=115, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=258, PETRI_PLACES=118, PETRI_TRANSITIONS=117} [2024-10-13 12:33:08,261 INFO L277 CegarLoopForPetriNet]: 119 programPoint places, -1 predicate places. [2024-10-13 12:33:08,261 INFO L471 AbstractCegarLoop]: Abstraction has has 118 places, 117 transitions, 258 flow [2024-10-13 12:33:08,262 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 63.666666666666664) internal successors, (191), 3 states have internal predecessors, (191), 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 12:33:08,262 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-13 12:33:08,262 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1] [2024-10-13 12:33:08,262 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-10-13 12:33:08,263 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [t2_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t2_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t2_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 62 more)] === [2024-10-13 12:33:08,263 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 12:33:08,263 INFO L85 PathProgramCache]: Analyzing trace with hash 19197, now seen corresponding path program 1 times [2024-10-13 12:33:08,263 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 12:33:08,264 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1969347318] [2024-10-13 12:33:08,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 12:33:08,264 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 12:33:08,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 12:33:08,434 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 12:33:08,435 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 12:33:08,435 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1969347318] [2024-10-13 12:33:08,436 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1969347318] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-13 12:33:08,436 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-13 12:33:08,436 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-10-13 12:33:08,436 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1560824091] [2024-10-13 12:33:08,436 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-13 12:33:08,437 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-13 12:33:08,438 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 12:33:08,438 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-13 12:33:08,438 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-13 12:33:08,502 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 64 out of 133 [2024-10-13 12:33:08,503 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 118 places, 117 transitions, 258 flow. Second operand has 3 states, 3 states have (on average 64.66666666666667) internal successors, (194), 3 states have internal predecessors, (194), 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 12:33:08,503 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-13 12:33:08,503 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 64 of 133 [2024-10-13 12:33:08,503 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-13 12:33:09,324 INFO L124 PetriNetUnfolderBase]: 2776/6501 cut-off events. [2024-10-13 12:33:09,324 INFO L125 PetriNetUnfolderBase]: For 152/152 co-relation queries the response was YES. [2024-10-13 12:33:09,337 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11030 conditions, 6501 events. 2776/6501 cut-off events. For 152/152 co-relation queries the response was YES. Maximal size of possible extension queue 191. Compared 52233 event pairs, 2586 based on Foata normal form. 2/5522 useless extension candidates. Maximal degree in co-relation 11018. Up to 4430 conditions per place. [2024-10-13 12:33:09,373 INFO L140 encePairwiseOnDemand]: 129/133 looper letters, 51 selfloop transitions, 2 changer transitions 0/115 dead transitions. [2024-10-13 12:33:09,373 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 118 places, 115 transitions, 360 flow [2024-10-13 12:33:09,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-13 12:33:09,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-10-13 12:33:09,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 247 transitions. [2024-10-13 12:33:09,376 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6190476190476191 [2024-10-13 12:33:09,376 INFO L175 Difference]: Start difference. First operand has 118 places, 117 transitions, 258 flow. Second operand 3 states and 247 transitions. [2024-10-13 12:33:09,377 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 118 places, 115 transitions, 360 flow [2024-10-13 12:33:09,382 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 116 places, 115 transitions, 356 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-10-13 12:33:09,384 INFO L231 Difference]: Finished difference. Result has 116 places, 115 transitions, 254 flow [2024-10-13 12:33:09,385 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=133, PETRI_DIFFERENCE_MINUEND_FLOW=250, PETRI_DIFFERENCE_MINUEND_PLACES=114, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=115, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=113, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=254, PETRI_PLACES=116, PETRI_TRANSITIONS=115} [2024-10-13 12:33:09,386 INFO L277 CegarLoopForPetriNet]: 119 programPoint places, -3 predicate places. [2024-10-13 12:33:09,387 INFO L471 AbstractCegarLoop]: Abstraction has has 116 places, 115 transitions, 254 flow [2024-10-13 12:33:09,387 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 64.66666666666667) internal successors, (194), 3 states have internal predecessors, (194), 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 12:33:09,387 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-13 12:33:09,387 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2024-10-13 12:33:09,388 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-10-13 12:33:09,388 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [t2_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t2_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t2_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 62 more)] === [2024-10-13 12:33:09,389 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 12:33:09,389 INFO L85 PathProgramCache]: Analyzing trace with hash 572421084, now seen corresponding path program 1 times [2024-10-13 12:33:09,389 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 12:33:09,390 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1772899254] [2024-10-13 12:33:09,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 12:33:09,390 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 12:33:09,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 12:33:09,470 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 12:33:09,471 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 12:33:09,471 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1772899254] [2024-10-13 12:33:09,471 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1772899254] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-13 12:33:09,471 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-13 12:33:09,471 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-10-13 12:33:09,472 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [764195173] [2024-10-13 12:33:09,472 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-13 12:33:09,472 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-13 12:33:09,472 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 12:33:09,473 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-13 12:33:09,473 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-13 12:33:09,532 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 62 out of 133 [2024-10-13 12:33:09,533 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 116 places, 115 transitions, 254 flow. Second operand has 3 states, 3 states have (on average 63.333333333333336) internal successors, (190), 3 states have internal predecessors, (190), 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 12:33:09,533 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-13 12:33:09,534 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 62 of 133 [2024-10-13 12:33:09,534 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-13 12:33:10,266 INFO L124 PetriNetUnfolderBase]: 3172/7101 cut-off events. [2024-10-13 12:33:10,266 INFO L125 PetriNetUnfolderBase]: For 151/151 co-relation queries the response was YES. [2024-10-13 12:33:10,280 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12274 conditions, 7101 events. 3172/7101 cut-off events. For 151/151 co-relation queries the response was YES. Maximal size of possible extension queue 213. Compared 58006 event pairs, 2202 based on Foata normal form. 0/6166 useless extension candidates. Maximal degree in co-relation 12262. Up to 3813 conditions per place. [2024-10-13 12:33:10,315 INFO L140 encePairwiseOnDemand]: 129/133 looper letters, 87 selfloop transitions, 2 changer transitions 0/147 dead transitions. [2024-10-13 12:33:10,316 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 116 places, 147 transitions, 496 flow [2024-10-13 12:33:10,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-13 12:33:10,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-10-13 12:33:10,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 277 transitions. [2024-10-13 12:33:10,318 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6942355889724311 [2024-10-13 12:33:10,318 INFO L175 Difference]: Start difference. First operand has 116 places, 115 transitions, 254 flow. Second operand 3 states and 277 transitions. [2024-10-13 12:33:10,318 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 116 places, 147 transitions, 496 flow [2024-10-13 12:33:10,320 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 114 places, 147 transitions, 492 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-10-13 12:33:10,322 INFO L231 Difference]: Finished difference. Result has 114 places, 113 transitions, 250 flow [2024-10-13 12:33:10,323 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=133, PETRI_DIFFERENCE_MINUEND_FLOW=246, PETRI_DIFFERENCE_MINUEND_PLACES=112, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=113, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=111, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=250, PETRI_PLACES=114, PETRI_TRANSITIONS=113} [2024-10-13 12:33:10,323 INFO L277 CegarLoopForPetriNet]: 119 programPoint places, -5 predicate places. [2024-10-13 12:33:10,324 INFO L471 AbstractCegarLoop]: Abstraction has has 114 places, 113 transitions, 250 flow [2024-10-13 12:33:10,324 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 63.333333333333336) internal successors, (190), 3 states have internal predecessors, (190), 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 12:33:10,324 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-13 12:33:10,324 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2024-10-13 12:33:10,324 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-10-13 12:33:10,324 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [t2_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t2_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t2_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 62 more)] === [2024-10-13 12:33:10,325 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 12:33:10,325 INFO L85 PathProgramCache]: Analyzing trace with hash 572421085, now seen corresponding path program 1 times [2024-10-13 12:33:10,325 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 12:33:10,325 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [463460090] [2024-10-13 12:33:10,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 12:33:10,326 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 12:33:10,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 12:33:10,447 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 12:33:10,447 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 12:33:10,447 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [463460090] [2024-10-13 12:33:10,448 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [463460090] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-13 12:33:10,448 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-13 12:33:10,448 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-10-13 12:33:10,448 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1342027062] [2024-10-13 12:33:10,448 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-13 12:33:10,449 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-13 12:33:10,449 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 12:33:10,450 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-13 12:33:10,450 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-13 12:33:10,510 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 133 [2024-10-13 12:33:10,511 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 114 places, 113 transitions, 250 flow. Second operand has 3 states, 3 states have (on average 66.33333333333333) internal successors, (199), 3 states have internal predecessors, (199), 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 12:33:10,511 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-13 12:33:10,511 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 133 [2024-10-13 12:33:10,512 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-13 12:33:11,313 INFO L124 PetriNetUnfolderBase]: 2693/6180 cut-off events. [2024-10-13 12:33:11,313 INFO L125 PetriNetUnfolderBase]: For 378/382 co-relation queries the response was YES. [2024-10-13 12:33:11,326 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10779 conditions, 6180 events. 2693/6180 cut-off events. For 378/382 co-relation queries the response was YES. Maximal size of possible extension queue 194. Compared 48945 event pairs, 2532 based on Foata normal form. 1/5349 useless extension candidates. Maximal degree in co-relation 9671. Up to 4269 conditions per place. [2024-10-13 12:33:11,350 INFO L140 encePairwiseOnDemand]: 128/133 looper letters, 54 selfloop transitions, 3 changer transitions 0/116 dead transitions. [2024-10-13 12:33:11,350 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 116 places, 116 transitions, 370 flow [2024-10-13 12:33:11,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-13 12:33:11,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-10-13 12:33:11,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 254 transitions. [2024-10-13 12:33:11,352 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6365914786967418 [2024-10-13 12:33:11,352 INFO L175 Difference]: Start difference. First operand has 114 places, 113 transitions, 250 flow. Second operand 3 states and 254 transitions. [2024-10-13 12:33:11,352 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 116 places, 116 transitions, 370 flow [2024-10-13 12:33:11,355 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 114 places, 116 transitions, 366 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-10-13 12:33:11,359 INFO L231 Difference]: Finished difference. Result has 115 places, 115 transitions, 267 flow [2024-10-13 12:33:11,359 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=133, PETRI_DIFFERENCE_MINUEND_FLOW=246, PETRI_DIFFERENCE_MINUEND_PLACES=112, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=113, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=110, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=267, PETRI_PLACES=115, PETRI_TRANSITIONS=115} [2024-10-13 12:33:11,360 INFO L277 CegarLoopForPetriNet]: 119 programPoint places, -4 predicate places. [2024-10-13 12:33:11,360 INFO L471 AbstractCegarLoop]: Abstraction has has 115 places, 115 transitions, 267 flow [2024-10-13 12:33:11,360 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 66.33333333333333) internal successors, (199), 3 states have internal predecessors, (199), 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 12:33:11,360 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-13 12:33:11,360 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 12:33:11,361 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-10-13 12:33:11,361 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting t1_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [t2_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t2_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t2_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 62 more)] === [2024-10-13 12:33:11,361 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 12:33:11,361 INFO L85 PathProgramCache]: Analyzing trace with hash 1977082409, now seen corresponding path program 1 times [2024-10-13 12:33:11,361 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 12:33:11,362 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1206925035] [2024-10-13 12:33:11,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 12:33:11,362 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 12:33:11,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 12:33:11,444 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 12:33:11,445 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 12:33:11,445 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1206925035] [2024-10-13 12:33:11,445 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1206925035] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-13 12:33:11,445 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-13 12:33:11,445 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-10-13 12:33:11,446 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [43457924] [2024-10-13 12:33:11,446 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-13 12:33:11,446 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-13 12:33:11,446 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 12:33:11,447 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-13 12:33:11,447 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-13 12:33:11,503 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 63 out of 133 [2024-10-13 12:33:11,503 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 115 places, 115 transitions, 267 flow. Second operand has 3 states, 3 states have (on average 65.0) internal successors, (195), 3 states have internal predecessors, (195), 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 12:33:11,504 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-13 12:33:11,504 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 63 of 133 [2024-10-13 12:33:11,504 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-13 12:33:12,349 INFO L124 PetriNetUnfolderBase]: 3410/7730 cut-off events. [2024-10-13 12:33:12,350 INFO L125 PetriNetUnfolderBase]: For 401/405 co-relation queries the response was YES. [2024-10-13 12:33:12,363 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13474 conditions, 7730 events. 3410/7730 cut-off events. For 401/405 co-relation queries the response was YES. Maximal size of possible extension queue 232. Compared 63052 event pairs, 2342 based on Foata normal form. 0/6712 useless extension candidates. Maximal degree in co-relation 13403. Up to 4247 conditions per place. [2024-10-13 12:33:12,388 INFO L140 encePairwiseOnDemand]: 127/133 looper letters, 97 selfloop transitions, 5 changer transitions 0/159 dead transitions. [2024-10-13 12:33:12,389 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 117 places, 159 transitions, 572 flow [2024-10-13 12:33:12,389 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-13 12:33:12,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-10-13 12:33:12,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 291 transitions. [2024-10-13 12:33:12,390 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.7293233082706767 [2024-10-13 12:33:12,391 INFO L175 Difference]: Start difference. First operand has 115 places, 115 transitions, 267 flow. Second operand 3 states and 291 transitions. [2024-10-13 12:33:12,391 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 117 places, 159 transitions, 572 flow [2024-10-13 12:33:12,393 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 116 places, 159 transitions, 569 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-10-13 12:33:12,396 INFO L231 Difference]: Finished difference. Result has 118 places, 118 transitions, 300 flow [2024-10-13 12:33:12,396 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=133, PETRI_DIFFERENCE_MINUEND_FLOW=264, PETRI_DIFFERENCE_MINUEND_PLACES=114, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=115, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=110, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=300, PETRI_PLACES=118, PETRI_TRANSITIONS=118} [2024-10-13 12:33:12,396 INFO L277 CegarLoopForPetriNet]: 119 programPoint places, -1 predicate places. [2024-10-13 12:33:12,397 INFO L471 AbstractCegarLoop]: Abstraction has has 118 places, 118 transitions, 300 flow [2024-10-13 12:33:12,397 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 65.0) internal successors, (195), 3 states have internal predecessors, (195), 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 12:33:12,397 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-13 12:33:12,398 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 12:33:12,398 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-10-13 12:33:12,399 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting t1_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [t2_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t2_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t2_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 62 more)] === [2024-10-13 12:33:12,400 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 12:33:12,400 INFO L85 PathProgramCache]: Analyzing trace with hash 1977082410, now seen corresponding path program 1 times [2024-10-13 12:33:12,400 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 12:33:12,400 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [25015734] [2024-10-13 12:33:12,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 12:33:12,401 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 12:33:12,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 12:33:12,510 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 12:33:12,510 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 12:33:12,510 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [25015734] [2024-10-13 12:33:12,511 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [25015734] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-13 12:33:12,511 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-13 12:33:12,511 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-10-13 12:33:12,511 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [481340126] [2024-10-13 12:33:12,511 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-13 12:33:12,512 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-13 12:33:12,512 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 12:33:12,512 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-13 12:33:12,513 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-13 12:33:12,564 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 64 out of 133 [2024-10-13 12:33:12,564 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 118 places, 118 transitions, 300 flow. Second operand has 3 states, 3 states have (on average 66.0) internal successors, (198), 3 states have internal predecessors, (198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 12:33:12,565 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-13 12:33:12,565 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 64 of 133 [2024-10-13 12:33:12,565 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-13 12:33:13,647 INFO L124 PetriNetUnfolderBase]: 4197/9380 cut-off events. [2024-10-13 12:33:13,648 INFO L125 PetriNetUnfolderBase]: For 2915/3220 co-relation queries the response was YES. [2024-10-13 12:33:13,680 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18519 conditions, 9380 events. 4197/9380 cut-off events. For 2915/3220 co-relation queries the response was YES. Maximal size of possible extension queue 297. Compared 79259 event pairs, 3189 based on Foata normal form. 582/8834 useless extension candidates. Maximal degree in co-relation 17409. Up to 5783 conditions per place. [2024-10-13 12:33:13,735 INFO L140 encePairwiseOnDemand]: 128/133 looper letters, 98 selfloop transitions, 5 changer transitions 0/162 dead transitions. [2024-10-13 12:33:13,735 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 120 places, 162 transitions, 617 flow [2024-10-13 12:33:13,736 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-13 12:33:13,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-10-13 12:33:13,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 292 transitions. [2024-10-13 12:33:13,737 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.731829573934837 [2024-10-13 12:33:13,737 INFO L175 Difference]: Start difference. First operand has 118 places, 118 transitions, 300 flow. Second operand 3 states and 292 transitions. [2024-10-13 12:33:13,737 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 120 places, 162 transitions, 617 flow [2024-10-13 12:33:13,745 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 118 places, 162 transitions, 603 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-10-13 12:33:13,747 INFO L231 Difference]: Finished difference. Result has 119 places, 121 transitions, 327 flow [2024-10-13 12:33:13,747 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=133, PETRI_DIFFERENCE_MINUEND_FLOW=290, PETRI_DIFFERENCE_MINUEND_PLACES=116, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=118, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=113, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=327, PETRI_PLACES=119, PETRI_TRANSITIONS=121} [2024-10-13 12:33:13,748 INFO L277 CegarLoopForPetriNet]: 119 programPoint places, 0 predicate places. [2024-10-13 12:33:13,749 INFO L471 AbstractCegarLoop]: Abstraction has has 119 places, 121 transitions, 327 flow [2024-10-13 12:33:13,749 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 66.0) internal successors, (198), 3 states have internal predecessors, (198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 12:33:13,749 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-13 12:33:13,750 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 12:33:13,750 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-10-13 12:33:13,750 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [t2_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t2_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t2_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 62 more)] === [2024-10-13 12:33:13,750 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 12:33:13,751 INFO L85 PathProgramCache]: Analyzing trace with hash 1159900417, now seen corresponding path program 1 times [2024-10-13 12:33:13,751 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 12:33:13,751 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [961580557] [2024-10-13 12:33:13,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 12:33:13,751 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 12:33:13,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 12:33:13,896 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 12:33:13,897 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 12:33:13,898 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [961580557] [2024-10-13 12:33:13,898 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [961580557] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-13 12:33:13,898 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1421524859] [2024-10-13 12:33:13,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 12:33:13,899 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 12:33:13,899 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-13 12:33:13,902 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 12:33:13,904 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 12:33:14,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 12:33:14,059 INFO L255 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-10-13 12:33:14,064 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-13 12:33:14,138 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 12:33:14,202 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 12:33:14,204 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-13 12:33:14,278 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 12:33:14,280 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1421524859] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-13 12:33:14,280 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-13 12:33:14,280 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2024-10-13 12:33:14,280 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [463208723] [2024-10-13 12:33:14,280 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-13 12:33:14,281 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-10-13 12:33:14,281 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 12:33:14,281 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-10-13 12:33:14,282 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-10-13 12:33:14,440 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 64 out of 133 [2024-10-13 12:33:14,441 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 119 places, 121 transitions, 327 flow. Second operand has 7 states, 7 states have (on average 66.57142857142857) internal successors, (466), 7 states have internal predecessors, (466), 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 12:33:14,441 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-13 12:33:14,441 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 64 of 133 [2024-10-13 12:33:14,441 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-13 12:33:15,026 INFO L124 PetriNetUnfolderBase]: 2427/5592 cut-off events. [2024-10-13 12:33:15,026 INFO L125 PetriNetUnfolderBase]: For 2263/3573 co-relation queries the response was YES. [2024-10-13 12:33:15,044 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10366 conditions, 5592 events. 2427/5592 cut-off events. For 2263/3573 co-relation queries the response was YES. Maximal size of possible extension queue 185. Compared 43961 event pairs, 2145 based on Foata normal form. 61/4897 useless extension candidates. Maximal degree in co-relation 10155. Up to 3817 conditions per place. [2024-10-13 12:33:15,074 INFO L140 encePairwiseOnDemand]: 128/133 looper letters, 66 selfloop transitions, 7 changer transitions 0/132 dead transitions. [2024-10-13 12:33:15,074 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 123 places, 132 transitions, 493 flow [2024-10-13 12:33:15,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-10-13 12:33:15,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-10-13 12:33:15,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 457 transitions. [2024-10-13 12:33:15,077 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5726817042606517 [2024-10-13 12:33:15,077 INFO L175 Difference]: Start difference. First operand has 119 places, 121 transitions, 327 flow. Second operand 6 states and 457 transitions. [2024-10-13 12:33:15,077 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 123 places, 132 transitions, 493 flow [2024-10-13 12:33:15,080 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 122 places, 132 transitions, 488 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-10-13 12:33:15,082 INFO L231 Difference]: Finished difference. Result has 122 places, 119 transitions, 326 flow [2024-10-13 12:33:15,082 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=133, PETRI_DIFFERENCE_MINUEND_FLOW=312, PETRI_DIFFERENCE_MINUEND_PLACES=117, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=119, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=112, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=326, PETRI_PLACES=122, PETRI_TRANSITIONS=119} [2024-10-13 12:33:15,084 INFO L277 CegarLoopForPetriNet]: 119 programPoint places, 3 predicate places. [2024-10-13 12:33:15,085 INFO L471 AbstractCegarLoop]: Abstraction has has 122 places, 119 transitions, 326 flow [2024-10-13 12:33:15,086 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 66.57142857142857) internal successors, (466), 7 states have internal predecessors, (466), 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 12:33:15,086 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-13 12:33:15,086 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 12:33:15,105 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-10-13 12:33:15,287 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 12:33:15,288 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting t1_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [t2_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t2_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t2_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 62 more)] === [2024-10-13 12:33:15,288 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 12:33:15,290 INFO L85 PathProgramCache]: Analyzing trace with hash 1597301789, now seen corresponding path program 1 times [2024-10-13 12:33:15,290 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 12:33:15,291 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1830376755] [2024-10-13 12:33:15,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 12:33:15,291 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 12:33:15,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 12:33:15,376 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 12:33:15,377 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 12:33:15,377 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1830376755] [2024-10-13 12:33:15,377 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1830376755] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-13 12:33:15,377 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1298905795] [2024-10-13 12:33:15,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 12:33:15,378 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 12:33:15,378 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-13 12:33:15,380 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 12:33:15,382 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 12:33:15,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 12:33:15,506 INFO L255 TraceCheckSpWp]: Trace formula consists of 207 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-10-13 12:33:15,507 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-13 12:33:15,527 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 12:33:15,528 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-13 12:33:15,546 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 12:33:15,547 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1298905795] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-13 12:33:15,547 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-13 12:33:15,547 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2024-10-13 12:33:15,548 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1227928117] [2024-10-13 12:33:15,548 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-13 12:33:15,548 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-10-13 12:33:15,548 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 12:33:15,548 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-10-13 12:33:15,549 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-10-13 12:33:15,563 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 66 out of 133 [2024-10-13 12:33:15,564 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 122 places, 119 transitions, 326 flow. Second operand has 7 states, 7 states have (on average 68.42857142857143) internal successors, (479), 7 states have internal predecessors, (479), 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 12:33:15,564 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-13 12:33:15,564 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 66 of 133 [2024-10-13 12:33:15,565 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-13 12:33:15,594 INFO L124 PetriNetUnfolderBase]: 12/73 cut-off events. [2024-10-13 12:33:15,594 INFO L125 PetriNetUnfolderBase]: For 69/69 co-relation queries the response was YES. [2024-10-13 12:33:15,595 INFO L83 FinitePrefix]: Finished finitePrefix Result has 155 conditions, 73 events. 12/73 cut-off events. For 69/69 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 228 event pairs, 6 based on Foata normal form. 6/63 useless extension candidates. Maximal degree in co-relation 147. Up to 26 conditions per place. [2024-10-13 12:33:15,595 INFO L140 encePairwiseOnDemand]: 130/133 looper letters, 16 selfloop transitions, 3 changer transitions 0/32 dead transitions. [2024-10-13 12:33:15,595 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 42 places, 32 transitions, 144 flow [2024-10-13 12:33:15,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-10-13 12:33:15,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-10-13 12:33:15,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 283 transitions. [2024-10-13 12:33:15,597 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5319548872180451 [2024-10-13 12:33:15,597 INFO L175 Difference]: Start difference. First operand has 122 places, 119 transitions, 326 flow. Second operand 4 states and 283 transitions. [2024-10-13 12:33:15,597 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 42 places, 32 transitions, 144 flow [2024-10-13 12:33:15,598 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 35 places, 32 transitions, 115 flow, removed 3 selfloop flow, removed 7 redundant places. [2024-10-13 12:33:15,599 INFO L231 Difference]: Finished difference. Result has 35 places, 26 transitions, 71 flow [2024-10-13 12:33:15,599 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=133, PETRI_DIFFERENCE_MINUEND_FLOW=65, PETRI_DIFFERENCE_MINUEND_PLACES=32, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=26, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=71, PETRI_PLACES=35, PETRI_TRANSITIONS=26} [2024-10-13 12:33:15,599 INFO L277 CegarLoopForPetriNet]: 119 programPoint places, -84 predicate places. [2024-10-13 12:33:15,600 INFO L471 AbstractCegarLoop]: Abstraction has has 35 places, 26 transitions, 71 flow [2024-10-13 12:33:15,600 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 68.42857142857143) internal successors, (479), 7 states have internal predecessors, (479), 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 12:33:15,600 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-13 12:33:15,600 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1] [2024-10-13 12:33:15,618 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 12:33:15,801 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,SelfDestructingSolverStorable7 [2024-10-13 12:33:15,802 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [t2_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t2_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t2_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 62 more)] === [2024-10-13 12:33:15,802 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 12:33:15,802 INFO L85 PathProgramCache]: Analyzing trace with hash 1597175266, now seen corresponding path program 1 times [2024-10-13 12:33:15,802 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 12:33:15,802 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1945906598] [2024-10-13 12:33:15,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 12:33:15,804 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 12:33:15,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-10-13 12:33:15,827 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2024-10-13 12:33:15,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-10-13 12:33:15,865 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2024-10-13 12:33:15,866 INFO L325 BasicCegarLoop]: Counterexample is feasible [2024-10-13 12:33:15,869 INFO L782 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (64 of 65 remaining) [2024-10-13 12:33:15,872 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t2_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (63 of 65 remaining) [2024-10-13 12:33:15,873 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t2_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (62 of 65 remaining) [2024-10-13 12:33:15,873 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t2_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (61 of 65 remaining) [2024-10-13 12:33:15,874 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t2_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (60 of 65 remaining) [2024-10-13 12:33:15,874 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t2_funErr12REQUIRES_VIOLATIONMEMORY_DEREFERENCE (59 of 65 remaining) [2024-10-13 12:33:15,874 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t2_funErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (58 of 65 remaining) [2024-10-13 12:33:15,874 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t2_funErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (57 of 65 remaining) [2024-10-13 12:33:15,874 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t2_funErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (56 of 65 remaining) [2024-10-13 12:33:15,875 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t2_funErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (55 of 65 remaining) [2024-10-13 12:33:15,875 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t2_funErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (54 of 65 remaining) [2024-10-13 12:33:15,875 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t2_funErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (53 of 65 remaining) [2024-10-13 12:33:15,875 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t2_funErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (52 of 65 remaining) [2024-10-13 12:33:15,876 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t2_funErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE (51 of 65 remaining) [2024-10-13 12:33:15,876 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t2_funErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE (50 of 65 remaining) [2024-10-13 12:33:15,876 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t2_funErr14ASSERT_VIOLATIONMEMORY_LEAK (49 of 65 remaining) [2024-10-13 12:33:15,876 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (48 of 65 remaining) [2024-10-13 12:33:15,876 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (47 of 65 remaining) [2024-10-13 12:33:15,877 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (46 of 65 remaining) [2024-10-13 12:33:15,877 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (45 of 65 remaining) [2024-10-13 12:33:15,877 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (44 of 65 remaining) [2024-10-13 12:33:15,877 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (43 of 65 remaining) [2024-10-13 12:33:15,877 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (42 of 65 remaining) [2024-10-13 12:33:15,878 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (41 of 65 remaining) [2024-10-13 12:33:15,878 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (40 of 65 remaining) [2024-10-13 12:33:15,878 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (39 of 65 remaining) [2024-10-13 12:33:15,878 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE (38 of 65 remaining) [2024-10-13 12:33:15,878 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE (37 of 65 remaining) [2024-10-13 12:33:15,879 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK (36 of 65 remaining) [2024-10-13 12:33:15,879 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (35 of 65 remaining) [2024-10-13 12:33:15,879 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t1_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (34 of 65 remaining) [2024-10-13 12:33:15,879 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t1_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (33 of 65 remaining) [2024-10-13 12:33:15,879 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t1_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (32 of 65 remaining) [2024-10-13 12:33:15,882 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t1_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (31 of 65 remaining) [2024-10-13 12:33:15,882 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t1_funErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (30 of 65 remaining) [2024-10-13 12:33:15,882 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t1_funErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (29 of 65 remaining) [2024-10-13 12:33:15,882 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t1_funErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (28 of 65 remaining) [2024-10-13 12:33:15,882 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t1_funErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (27 of 65 remaining) [2024-10-13 12:33:15,883 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t1_funErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (26 of 65 remaining) [2024-10-13 12:33:15,883 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t1_funErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (25 of 65 remaining) [2024-10-13 12:33:15,883 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t2_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (24 of 65 remaining) [2024-10-13 12:33:15,883 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t2_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (23 of 65 remaining) [2024-10-13 12:33:15,883 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t2_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (22 of 65 remaining) [2024-10-13 12:33:15,884 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t2_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (21 of 65 remaining) [2024-10-13 12:33:15,884 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t2_funErr12REQUIRES_VIOLATIONMEMORY_DEREFERENCE (20 of 65 remaining) [2024-10-13 12:33:15,884 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t2_funErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (19 of 65 remaining) [2024-10-13 12:33:15,884 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t2_funErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (18 of 65 remaining) [2024-10-13 12:33:15,884 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t2_funErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (17 of 65 remaining) [2024-10-13 12:33:15,885 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t2_funErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (16 of 65 remaining) [2024-10-13 12:33:15,885 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t2_funErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (15 of 65 remaining) [2024-10-13 12:33:15,885 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t2_funErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (14 of 65 remaining) [2024-10-13 12:33:15,885 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t2_funErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (13 of 65 remaining) [2024-10-13 12:33:15,885 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t2_funErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE (12 of 65 remaining) [2024-10-13 12:33:15,886 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t2_funErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE (11 of 65 remaining) [2024-10-13 12:33:15,886 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t2_funErr14ASSERT_VIOLATIONMEMORY_LEAK (10 of 65 remaining) [2024-10-13 12:33:15,886 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t1_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (9 of 65 remaining) [2024-10-13 12:33:15,886 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t1_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (8 of 65 remaining) [2024-10-13 12:33:15,886 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t1_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (7 of 65 remaining) [2024-10-13 12:33:15,887 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t1_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (6 of 65 remaining) [2024-10-13 12:33:15,887 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t1_funErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 65 remaining) [2024-10-13 12:33:15,887 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t1_funErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 65 remaining) [2024-10-13 12:33:15,887 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t1_funErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (3 of 65 remaining) [2024-10-13 12:33:15,887 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t1_funErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (2 of 65 remaining) [2024-10-13 12:33:15,888 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t1_funErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (1 of 65 remaining) [2024-10-13 12:33:15,888 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t1_funErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (0 of 65 remaining) [2024-10-13 12:33:15,888 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-10-13 12:33:15,888 INFO L407 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 12:33:15,891 WARN L239 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2024-10-13 12:33:15,892 INFO L484 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2024-10-13 12:33:15,987 INFO L143 ThreadInstanceAdder]: Constructed 8 joinOtherThreadTransitions. [2024-10-13 12:33:15,994 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 202 places, 231 transitions, 506 flow [2024-10-13 12:33:16,123 INFO L124 PetriNetUnfolderBase]: 147/845 cut-off events. [2024-10-13 12:33:16,124 INFO L125 PetriNetUnfolderBase]: For 72/89 co-relation queries the response was YES. [2024-10-13 12:33:16,136 INFO L83 FinitePrefix]: Finished finitePrefix Result has 934 conditions, 845 events. 147/845 cut-off events. For 72/89 co-relation queries the response was YES. Maximal size of possible extension queue 48. Compared 6031 event pairs, 1 based on Foata normal form. 0/482 useless extension candidates. Maximal degree in co-relation 533. Up to 32 conditions per place. [2024-10-13 12:33:16,136 INFO L82 GeneralOperation]: Start removeDead. Operand has 202 places, 231 transitions, 506 flow [2024-10-13 12:33:16,149 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 202 places, 231 transitions, 506 flow [2024-10-13 12:33:16,151 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-10-13 12:33:16,152 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;@626f0660, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-10-13 12:33:16,152 INFO L334 AbstractCegarLoop]: Starting to check reachability of 90 error locations. [2024-10-13 12:33:16,154 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-10-13 12:33:16,154 INFO L124 PetriNetUnfolderBase]: 0/2 cut-off events. [2024-10-13 12:33:16,154 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-10-13 12:33:16,155 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-13 12:33:16,155 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1] [2024-10-13 12:33:16,155 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [t2_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t2_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t2_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 87 more)] === [2024-10-13 12:33:16,155 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 12:33:16,155 INFO L85 PathProgramCache]: Analyzing trace with hash 26524, now seen corresponding path program 1 times [2024-10-13 12:33:16,156 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 12:33:16,156 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [642540002] [2024-10-13 12:33:16,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 12:33:16,156 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 12:33:16,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 12:33:16,196 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 12:33:16,197 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 12:33:16,197 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [642540002] [2024-10-13 12:33:16,197 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [642540002] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-13 12:33:16,197 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-13 12:33:16,198 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-10-13 12:33:16,198 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [342994925] [2024-10-13 12:33:16,198 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-13 12:33:16,198 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-13 12:33:16,198 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 12:33:16,199 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-13 12:33:16,199 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-13 12:33:16,273 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 107 out of 231 [2024-10-13 12:33:16,274 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 202 places, 231 transitions, 506 flow. Second operand has 3 states, 3 states have (on average 107.66666666666667) internal successors, (323), 3 states have internal predecessors, (323), 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 12:33:16,275 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-13 12:33:16,275 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 107 of 231 [2024-10-13 12:33:16,275 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand