./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/pthread/twostage_3.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 3061b6dc Calling Ultimate with: /root/.sdkman/candidates/java/11.0.12-open/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 ../sv-benchmarks/c/pthread/twostage_3.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 1032ef3fe166161226ca7e81ea27802cfc3f516ad1e4b45c387461fe1ddeccf8 --- Real Ultimate output --- This is Ultimate 0.2.5-tmp.dk.eval-assert-order-craig-3061b6d-m [2024-11-19 09:20:47,529 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-19 09:20:47,597 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2024-11-19 09:20:47,602 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-19 09:20:47,603 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-19 09:20:47,637 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-19 09:20:47,638 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-19 09:20:47,638 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-19 09:20:47,639 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-19 09:20:47,639 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-19 09:20:47,642 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-19 09:20:47,642 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-19 09:20:47,644 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-19 09:20:47,644 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-19 09:20:47,647 INFO L153 SettingsManager]: * Use SBE=true [2024-11-19 09:20:47,647 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-19 09:20:47,647 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-19 09:20:47,648 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-19 09:20:47,648 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-19 09:20:47,648 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-19 09:20:47,649 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2024-11-19 09:20:47,652 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2024-11-19 09:20:47,653 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2024-11-19 09:20:47,653 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-19 09:20:47,653 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-11-19 09:20:47,653 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-19 09:20:47,654 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2024-11-19 09:20:47,656 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-19 09:20:47,656 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-19 09:20:47,656 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-19 09:20:47,657 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-19 09:20:47,657 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-19 09:20:47,658 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-19 09:20:47,658 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-19 09:20:47,658 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-19 09:20:47,659 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-19 09:20:47,659 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-19 09:20:47,659 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-19 09:20:47,660 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-19 09:20:47,660 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-19 09:20:47,660 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-19 09:20:47,660 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-19 09:20:47,661 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 1032ef3fe166161226ca7e81ea27802cfc3f516ad1e4b45c387461fe1ddeccf8 [2024-11-19 09:20:47,923 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-19 09:20:47,953 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-19 09:20:47,956 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-19 09:20:47,957 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-19 09:20:47,958 INFO L274 PluginConnector]: CDTParser initialized [2024-11-19 09:20:47,960 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/pthread/twostage_3.i [2024-11-19 09:20:49,497 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-19 09:20:49,783 INFO L384 CDTParser]: Found 1 translation units. [2024-11-19 09:20:49,784 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/pthread/twostage_3.i [2024-11-19 09:20:49,807 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d9da5320a/607f6cd1faa54bcda32189d4affc2c69/FLAGe889155c9 [2024-11-19 09:20:49,824 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d9da5320a/607f6cd1faa54bcda32189d4affc2c69 [2024-11-19 09:20:49,827 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-19 09:20:49,828 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-19 09:20:49,829 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-19 09:20:49,829 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-19 09:20:49,834 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-19 09:20:49,835 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 09:20:49" (1/1) ... [2024-11-19 09:20:49,836 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@512cbae3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 09:20:49, skipping insertion in model container [2024-11-19 09:20:49,836 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 09:20:49" (1/1) ... [2024-11-19 09:20:49,892 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-19 09:20:50,491 WARN L1070 CHandler]: saw a pointer cast to a type that we could not get a type size for, not adapting memory model [2024-11-19 09:20:50,492 WARN L1070 CHandler]: saw a pointer cast to a type that we could not get a type size for, not adapting memory model [2024-11-19 09:20:50,511 WARN L1674 CHandler]: Possible shadowing of function lock [2024-11-19 09:20:50,513 WARN L1674 CHandler]: Possible shadowing of function lock [2024-11-19 09:20:50,515 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-19 09:20:50,528 INFO L200 MainTranslator]: Completed pre-run [2024-11-19 09:20:50,603 WARN L1674 CHandler]: Possible shadowing of function lock [2024-11-19 09:20:50,604 WARN L1674 CHandler]: Possible shadowing of function lock [2024-11-19 09:20:50,604 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-19 09:20:50,677 INFO L204 MainTranslator]: Completed translation [2024-11-19 09:20:50,678 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 09:20:50 WrapperNode [2024-11-19 09:20:50,678 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-19 09:20:50,679 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-19 09:20:50,679 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-19 09:20:50,679 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-19 09:20:50,688 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 09:20:50" (1/1) ... [2024-11-19 09:20:50,720 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 09:20:50" (1/1) ... [2024-11-19 09:20:50,765 INFO L138 Inliner]: procedures = 373, calls = 34, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 175 [2024-11-19 09:20:50,767 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-19 09:20:50,768 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-19 09:20:50,768 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-19 09:20:50,768 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-19 09:20:50,778 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 09:20:50" (1/1) ... [2024-11-19 09:20:50,778 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 09:20:50" (1/1) ... [2024-11-19 09:20:50,782 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 09:20:50" (1/1) ... [2024-11-19 09:20:50,799 INFO L175 MemorySlicer]: Split 6 memory accesses to 3 slices as follows [2, 2, 2]. 33 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0, 0]. The 2 writes are split as follows [0, 1, 1]. [2024-11-19 09:20:50,800 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 09:20:50" (1/1) ... [2024-11-19 09:20:50,800 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 09:20:50" (1/1) ... [2024-11-19 09:20:50,811 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 09:20:50" (1/1) ... [2024-11-19 09:20:50,818 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 09:20:50" (1/1) ... [2024-11-19 09:20:50,821 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 09:20:50" (1/1) ... [2024-11-19 09:20:50,823 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 09:20:50" (1/1) ... [2024-11-19 09:20:50,827 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-19 09:20:50,828 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-19 09:20:50,828 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-19 09:20:50,828 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-19 09:20:50,829 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 09:20:50" (1/1) ... [2024-11-19 09:20:50,835 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-19 09:20:50,851 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 09:20:50,876 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) [2024-11-19 09:20:50,882 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 [2024-11-19 09:20:50,940 INFO L130 BoogieDeclarations]: Found specification of procedure funcA [2024-11-19 09:20:50,940 INFO L138 BoogieDeclarations]: Found implementation of procedure funcA [2024-11-19 09:20:50,940 INFO L130 BoogieDeclarations]: Found specification of procedure funcB [2024-11-19 09:20:50,941 INFO L138 BoogieDeclarations]: Found implementation of procedure funcB [2024-11-19 09:20:50,941 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-11-19 09:20:50,941 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-11-19 09:20:50,941 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexUnlock [2024-11-19 09:20:50,941 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-11-19 09:20:50,941 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-11-19 09:20:50,942 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2024-11-19 09:20:50,942 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-11-19 09:20:50,942 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-11-19 09:20:50,942 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2024-11-19 09:20:50,942 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2024-11-19 09:20:50,942 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-11-19 09:20:50,942 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-19 09:20:50,943 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-19 09:20:50,943 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-11-19 09:20:50,943 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-11-19 09:20:50,943 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-19 09:20:50,943 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-19 09:20:50,945 WARN L207 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2024-11-19 09:20:51,095 INFO L238 CfgBuilder]: Building ICFG [2024-11-19 09:20:51,097 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-19 09:20:51,465 INFO L283 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-11-19 09:20:51,466 INFO L287 CfgBuilder]: Performing block encoding [2024-11-19 09:20:51,714 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-19 09:20:51,715 INFO L316 CfgBuilder]: Removed 4 assume(true) statements. [2024-11-19 09:20:51,715 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 09:20:51 BoogieIcfgContainer [2024-11-19 09:20:51,715 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-19 09:20:51,718 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-19 09:20:51,718 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-19 09:20:51,721 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-19 09:20:51,721 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 09:20:49" (1/3) ... [2024-11-19 09:20:51,722 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@12097c5a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 09:20:51, skipping insertion in model container [2024-11-19 09:20:51,722 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 09:20:50" (2/3) ... [2024-11-19 09:20:51,722 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@12097c5a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 09:20:51, skipping insertion in model container [2024-11-19 09:20:51,723 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 09:20:51" (3/3) ... [2024-11-19 09:20:51,724 INFO L112 eAbstractionObserver]: Analyzing ICFG twostage_3.i [2024-11-19 09:20:51,741 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-19 09:20:51,741 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 12 error locations. [2024-11-19 09:20:51,741 INFO L489 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-11-19 09:20:51,798 INFO L143 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2024-11-19 09:20:51,839 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 75 places, 79 transitions, 178 flow [2024-11-19 09:20:51,919 INFO L124 PetriNetUnfolderBase]: 16/168 cut-off events. [2024-11-19 09:20:51,920 INFO L125 PetriNetUnfolderBase]: For 8/8 co-relation queries the response was YES. [2024-11-19 09:20:51,925 INFO L83 FinitePrefix]: Finished finitePrefix Result has 185 conditions, 168 events. 16/168 cut-off events. For 8/8 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 805 event pairs, 0 based on Foata normal form. 0/108 useless extension candidates. Maximal degree in co-relation 86. Up to 7 conditions per place. [2024-11-19 09:20:51,926 INFO L82 GeneralOperation]: Start removeDead. Operand has 75 places, 79 transitions, 178 flow [2024-11-19 09:20:51,931 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 75 places, 79 transitions, 178 flow [2024-11-19 09:20:51,940 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-19 09:20:51,949 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;@5b9bce26, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-19 09:20:51,949 INFO L334 AbstractCegarLoop]: Starting to check reachability of 15 error locations. [2024-11-19 09:20:51,953 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-11-19 09:20:51,953 INFO L124 PetriNetUnfolderBase]: 1/6 cut-off events. [2024-11-19 09:20:51,953 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-11-19 09:20:51,954 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 09:20:51,956 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2024-11-19 09:20:51,956 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2024-11-19 09:20:51,963 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 09:20:51,963 INFO L85 PathProgramCache]: Analyzing trace with hash 16582774, now seen corresponding path program 1 times [2024-11-19 09:20:51,976 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 09:20:51,976 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2043341299] [2024-11-19 09:20:51,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 09:20:51,977 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 09:20:52,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 09:20:52,199 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 09:20:52,199 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 09:20:52,200 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2043341299] [2024-11-19 09:20:52,201 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2043341299] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-19 09:20:52,201 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-19 09:20:52,201 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-11-19 09:20:52,203 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [353552986] [2024-11-19 09:20:52,204 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-19 09:20:52,211 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-11-19 09:20:52,216 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 09:20:52,254 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-11-19 09:20:52,254 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-11-19 09:20:52,256 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 31 out of 79 [2024-11-19 09:20:52,258 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 79 transitions, 178 flow. Second operand has 2 states, 2 states have (on average 32.0) internal successors, (64), 2 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 09:20:52,258 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 09:20:52,259 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 31 of 79 [2024-11-19 09:20:52,260 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 09:20:52,775 INFO L124 PetriNetUnfolderBase]: 1878/3765 cut-off events. [2024-11-19 09:20:52,775 INFO L125 PetriNetUnfolderBase]: For 116/116 co-relation queries the response was YES. [2024-11-19 09:20:52,793 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6822 conditions, 3765 events. 1878/3765 cut-off events. For 116/116 co-relation queries the response was YES. Maximal size of possible extension queue 135. Compared 24618 event pairs, 1757 based on Foata normal form. 180/3673 useless extension candidates. Maximal degree in co-relation 6241. Up to 2976 conditions per place. [2024-11-19 09:20:52,818 INFO L140 encePairwiseOnDemand]: 74/79 looper letters, 42 selfloop transitions, 0 changer transitions 0/73 dead transitions. [2024-11-19 09:20:52,819 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 73 transitions, 250 flow [2024-11-19 09:20:52,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-11-19 09:20:52,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2024-11-19 09:20:52,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 109 transitions. [2024-11-19 09:20:52,832 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.689873417721519 [2024-11-19 09:20:52,833 INFO L175 Difference]: Start difference. First operand has 75 places, 79 transitions, 178 flow. Second operand 2 states and 109 transitions. [2024-11-19 09:20:52,834 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 73 transitions, 250 flow [2024-11-19 09:20:52,844 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 73 transitions, 250 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-11-19 09:20:52,847 INFO L231 Difference]: Finished difference. Result has 73 places, 73 transitions, 166 flow [2024-11-19 09:20:52,851 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=79, PETRI_DIFFERENCE_MINUEND_FLOW=166, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=73, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=166, PETRI_PLACES=73, PETRI_TRANSITIONS=73} [2024-11-19 09:20:52,855 INFO L277 CegarLoopForPetriNet]: 75 programPoint places, -2 predicate places. [2024-11-19 09:20:52,856 INFO L471 AbstractCegarLoop]: Abstraction has has 73 places, 73 transitions, 166 flow [2024-11-19 09:20:52,856 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 32.0) internal successors, (64), 2 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 09:20:52,857 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 09:20:52,857 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2024-11-19 09:20:52,857 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-19 09:20:52,857 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2024-11-19 09:20:52,858 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 09:20:52,858 INFO L85 PathProgramCache]: Analyzing trace with hash 514120305, now seen corresponding path program 1 times [2024-11-19 09:20:52,858 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 09:20:52,858 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1062332999] [2024-11-19 09:20:52,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 09:20:52,859 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 09:20:52,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 09:20:53,156 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 09:20:53,157 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 09:20:53,157 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1062332999] [2024-11-19 09:20:53,157 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1062332999] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-19 09:20:53,158 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-19 09:20:53,158 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-19 09:20:53,158 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1867075768] [2024-11-19 09:20:53,158 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-19 09:20:53,159 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-19 09:20:53,159 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 09:20:53,160 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-19 09:20:53,161 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-19 09:20:53,197 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 27 out of 79 [2024-11-19 09:20:53,198 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 73 transitions, 166 flow. Second operand has 3 states, 3 states have (on average 28.333333333333332) internal successors, (85), 3 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 09:20:53,198 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 09:20:53,198 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 27 of 79 [2024-11-19 09:20:53,198 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 09:20:53,687 INFO L124 PetriNetUnfolderBase]: 2141/4236 cut-off events. [2024-11-19 09:20:53,688 INFO L125 PetriNetUnfolderBase]: For 115/123 co-relation queries the response was YES. [2024-11-19 09:20:53,698 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7736 conditions, 4236 events. 2141/4236 cut-off events. For 115/123 co-relation queries the response was YES. Maximal size of possible extension queue 161. Compared 29270 event pairs, 1506 based on Foata normal form. 8/3998 useless extension candidates. Maximal degree in co-relation 7731. Up to 2578 conditions per place. [2024-11-19 09:20:53,720 INFO L140 encePairwiseOnDemand]: 75/79 looper letters, 63 selfloop transitions, 2 changer transitions 0/92 dead transitions. [2024-11-19 09:20:53,721 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 92 transitions, 334 flow [2024-11-19 09:20:53,722 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-19 09:20:53,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-19 09:20:53,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 148 transitions. [2024-11-19 09:20:53,723 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6244725738396625 [2024-11-19 09:20:53,723 INFO L175 Difference]: Start difference. First operand has 73 places, 73 transitions, 166 flow. Second operand 3 states and 148 transitions. [2024-11-19 09:20:53,723 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 92 transitions, 334 flow [2024-11-19 09:20:53,726 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 92 transitions, 334 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-11-19 09:20:53,728 INFO L231 Difference]: Finished difference. Result has 73 places, 71 transitions, 166 flow [2024-11-19 09:20:53,728 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=79, PETRI_DIFFERENCE_MINUEND_FLOW=162, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=71, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=166, PETRI_PLACES=73, PETRI_TRANSITIONS=71} [2024-11-19 09:20:53,729 INFO L277 CegarLoopForPetriNet]: 75 programPoint places, -2 predicate places. [2024-11-19 09:20:53,729 INFO L471 AbstractCegarLoop]: Abstraction has has 73 places, 71 transitions, 166 flow [2024-11-19 09:20:53,730 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 28.333333333333332) internal successors, (85), 3 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 09:20:53,730 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 09:20:53,730 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2024-11-19 09:20:53,730 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-19 09:20:53,730 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2024-11-19 09:20:53,731 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 09:20:53,731 INFO L85 PathProgramCache]: Analyzing trace with hash 514120306, now seen corresponding path program 1 times [2024-11-19 09:20:53,731 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 09:20:53,731 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [780871274] [2024-11-19 09:20:53,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 09:20:53,732 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 09:20:53,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 09:20:54,065 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 09:20:54,065 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 09:20:54,067 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [780871274] [2024-11-19 09:20:54,067 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [780871274] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-19 09:20:54,067 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-19 09:20:54,067 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-19 09:20:54,068 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [980354932] [2024-11-19 09:20:54,068 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-19 09:20:54,068 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-19 09:20:54,068 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 09:20:54,069 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-19 09:20:54,069 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2024-11-19 09:20:54,151 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 29 out of 79 [2024-11-19 09:20:54,151 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 71 transitions, 166 flow. Second operand has 5 states, 5 states have (on average 29.8) internal successors, (149), 5 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 09:20:54,152 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 09:20:54,152 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 29 of 79 [2024-11-19 09:20:54,152 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 09:20:55,099 INFO L124 PetriNetUnfolderBase]: 4304/8666 cut-off events. [2024-11-19 09:20:55,100 INFO L125 PetriNetUnfolderBase]: For 512/512 co-relation queries the response was YES. [2024-11-19 09:20:55,116 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15903 conditions, 8666 events. 4304/8666 cut-off events. For 512/512 co-relation queries the response was YES. Maximal size of possible extension queue 309. Compared 68024 event pairs, 3633 based on Foata normal form. 1/8163 useless extension candidates. Maximal degree in co-relation 15897. Up to 3417 conditions per place. [2024-11-19 09:20:55,164 INFO L140 encePairwiseOnDemand]: 73/79 looper letters, 93 selfloop transitions, 4 changer transitions 0/124 dead transitions. [2024-11-19 09:20:55,165 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 124 transitions, 488 flow [2024-11-19 09:20:55,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-19 09:20:55,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-19 09:20:55,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 215 transitions. [2024-11-19 09:20:55,167 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.680379746835443 [2024-11-19 09:20:55,167 INFO L175 Difference]: Start difference. First operand has 73 places, 71 transitions, 166 flow. Second operand 4 states and 215 transitions. [2024-11-19 09:20:55,167 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 124 transitions, 488 flow [2024-11-19 09:20:55,173 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 124 transitions, 480 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-19 09:20:55,178 INFO L231 Difference]: Finished difference. Result has 76 places, 73 transitions, 188 flow [2024-11-19 09:20:55,178 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=79, PETRI_DIFFERENCE_MINUEND_FLOW=162, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=71, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=188, PETRI_PLACES=76, PETRI_TRANSITIONS=73} [2024-11-19 09:20:55,180 INFO L277 CegarLoopForPetriNet]: 75 programPoint places, 1 predicate places. [2024-11-19 09:20:55,180 INFO L471 AbstractCegarLoop]: Abstraction has has 76 places, 73 transitions, 188 flow [2024-11-19 09:20:55,180 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 29.8) internal successors, (149), 5 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 09:20:55,180 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 09:20:55,181 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 09:20:55,181 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-11-19 09:20:55,181 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2024-11-19 09:20:55,182 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 09:20:55,182 INFO L85 PathProgramCache]: Analyzing trace with hash -1296173647, now seen corresponding path program 1 times [2024-11-19 09:20:55,182 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 09:20:55,183 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2061736160] [2024-11-19 09:20:55,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 09:20:55,183 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 09:20:55,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 09:20:55,399 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 09:20:55,400 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 09:20:55,400 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2061736160] [2024-11-19 09:20:55,400 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2061736160] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-19 09:20:55,400 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-19 09:20:55,400 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-19 09:20:55,400 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2010102629] [2024-11-19 09:20:55,400 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-19 09:20:55,401 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-19 09:20:55,401 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 09:20:55,401 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-19 09:20:55,401 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-19 09:20:55,462 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 26 out of 79 [2024-11-19 09:20:55,463 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 73 transitions, 188 flow. Second operand has 4 states, 4 states have (on average 27.5) internal successors, (110), 4 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 09:20:55,463 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 09:20:55,463 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 26 of 79 [2024-11-19 09:20:55,464 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 09:20:56,585 INFO L124 PetriNetUnfolderBase]: 5428/10769 cut-off events. [2024-11-19 09:20:56,585 INFO L125 PetriNetUnfolderBase]: For 304/304 co-relation queries the response was YES. [2024-11-19 09:20:56,610 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19508 conditions, 10769 events. 5428/10769 cut-off events. For 304/304 co-relation queries the response was YES. Maximal size of possible extension queue 362. Compared 85665 event pairs, 4070 based on Foata normal form. 1/9656 useless extension candidates. Maximal degree in co-relation 19500. Up to 8440 conditions per place. [2024-11-19 09:20:56,712 INFO L140 encePairwiseOnDemand]: 71/79 looper letters, 72 selfloop transitions, 7 changer transitions 2/105 dead transitions. [2024-11-19 09:20:56,712 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 105 transitions, 419 flow [2024-11-19 09:20:56,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-19 09:20:56,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-19 09:20:56,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 185 transitions. [2024-11-19 09:20:56,715 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5854430379746836 [2024-11-19 09:20:56,715 INFO L175 Difference]: Start difference. First operand has 76 places, 73 transitions, 188 flow. Second operand 4 states and 185 transitions. [2024-11-19 09:20:56,715 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 105 transitions, 419 flow [2024-11-19 09:20:56,718 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 105 transitions, 417 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-19 09:20:56,721 INFO L231 Difference]: Finished difference. Result has 80 places, 76 transitions, 226 flow [2024-11-19 09:20:56,722 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=79, PETRI_DIFFERENCE_MINUEND_FLOW=186, PETRI_DIFFERENCE_MINUEND_PLACES=75, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=73, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=226, PETRI_PLACES=80, PETRI_TRANSITIONS=76} [2024-11-19 09:20:56,723 INFO L277 CegarLoopForPetriNet]: 75 programPoint places, 5 predicate places. [2024-11-19 09:20:56,723 INFO L471 AbstractCegarLoop]: Abstraction has has 80 places, 76 transitions, 226 flow [2024-11-19 09:20:56,723 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 27.5) internal successors, (110), 4 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 09:20:56,723 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 09:20:56,724 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 09:20:56,724 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-11-19 09:20:56,724 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2024-11-19 09:20:56,725 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 09:20:56,725 INFO L85 PathProgramCache]: Analyzing trace with hash -1526675220, now seen corresponding path program 1 times [2024-11-19 09:20:56,725 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 09:20:56,725 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1759787203] [2024-11-19 09:20:56,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 09:20:56,726 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 09:20:56,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 09:20:56,775 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 09:20:56,776 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 09:20:56,776 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1759787203] [2024-11-19 09:20:56,776 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1759787203] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-19 09:20:56,776 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-19 09:20:56,777 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-19 09:20:56,777 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [8382520] [2024-11-19 09:20:56,777 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-19 09:20:56,777 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-19 09:20:56,778 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 09:20:56,778 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-19 09:20:56,778 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-19 09:20:56,798 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 27 out of 79 [2024-11-19 09:20:56,799 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 80 places, 76 transitions, 226 flow. Second operand has 3 states, 3 states have (on average 29.333333333333332) internal successors, (88), 3 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 09:20:56,799 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 09:20:56,799 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 27 of 79 [2024-11-19 09:20:56,799 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 09:20:57,671 INFO L124 PetriNetUnfolderBase]: 4781/9625 cut-off events. [2024-11-19 09:20:57,672 INFO L125 PetriNetUnfolderBase]: For 878/878 co-relation queries the response was YES. [2024-11-19 09:20:57,698 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18240 conditions, 9625 events. 4781/9625 cut-off events. For 878/878 co-relation queries the response was YES. Maximal size of possible extension queue 355. Compared 79496 event pairs, 3484 based on Foata normal form. 0/9240 useless extension candidates. Maximal degree in co-relation 18230. Up to 5857 conditions per place. [2024-11-19 09:20:57,738 INFO L140 encePairwiseOnDemand]: 75/79 looper letters, 66 selfloop transitions, 4 changer transitions 0/95 dead transitions. [2024-11-19 09:20:57,738 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 80 places, 95 transitions, 404 flow [2024-11-19 09:20:57,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-19 09:20:57,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-19 09:20:57,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 148 transitions. [2024-11-19 09:20:57,740 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6244725738396625 [2024-11-19 09:20:57,740 INFO L175 Difference]: Start difference. First operand has 80 places, 76 transitions, 226 flow. Second operand 3 states and 148 transitions. [2024-11-19 09:20:57,740 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 80 places, 95 transitions, 404 flow [2024-11-19 09:20:57,745 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 95 transitions, 393 flow, removed 1 selfloop flow, removed 2 redundant places. [2024-11-19 09:20:57,747 INFO L231 Difference]: Finished difference. Result has 78 places, 74 transitions, 219 flow [2024-11-19 09:20:57,747 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=79, PETRI_DIFFERENCE_MINUEND_FLOW=211, PETRI_DIFFERENCE_MINUEND_PLACES=76, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=74, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=219, PETRI_PLACES=78, PETRI_TRANSITIONS=74} [2024-11-19 09:20:57,748 INFO L277 CegarLoopForPetriNet]: 75 programPoint places, 3 predicate places. [2024-11-19 09:20:57,748 INFO L471 AbstractCegarLoop]: Abstraction has has 78 places, 74 transitions, 219 flow [2024-11-19 09:20:57,749 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 29.333333333333332) internal successors, (88), 3 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 09:20:57,749 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 09:20:57,749 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 09:20:57,749 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-11-19 09:20:57,750 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2024-11-19 09:20:57,750 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 09:20:57,750 INFO L85 PathProgramCache]: Analyzing trace with hash -1526675219, now seen corresponding path program 1 times [2024-11-19 09:20:57,750 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 09:20:57,751 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [865897800] [2024-11-19 09:20:57,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 09:20:57,751 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 09:20:57,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 09:20:57,953 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 09:20:57,953 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 09:20:57,953 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [865897800] [2024-11-19 09:20:57,953 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [865897800] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-19 09:20:57,953 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-19 09:20:57,954 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-19 09:20:57,954 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2105809588] [2024-11-19 09:20:57,954 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-19 09:20:57,954 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-19 09:20:57,954 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 09:20:57,955 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-19 09:20:57,955 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-19 09:20:58,024 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 26 out of 79 [2024-11-19 09:20:58,024 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 74 transitions, 219 flow. Second operand has 5 states, 5 states have (on average 27.4) internal successors, (137), 5 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 09:20:58,024 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 09:20:58,025 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 26 of 79 [2024-11-19 09:20:58,025 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 09:20:59,143 INFO L124 PetriNetUnfolderBase]: 5920/11309 cut-off events. [2024-11-19 09:20:59,144 INFO L125 PetriNetUnfolderBase]: For 1377/1377 co-relation queries the response was YES. [2024-11-19 09:20:59,177 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22335 conditions, 11309 events. 5920/11309 cut-off events. For 1377/1377 co-relation queries the response was YES. Maximal size of possible extension queue 399. Compared 92956 event pairs, 1087 based on Foata normal form. 0/10545 useless extension candidates. Maximal degree in co-relation 22325. Up to 3622 conditions per place. [2024-11-19 09:20:59,220 INFO L140 encePairwiseOnDemand]: 66/79 looper letters, 113 selfloop transitions, 16 changer transitions 0/151 dead transitions. [2024-11-19 09:20:59,221 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 151 transitions, 649 flow [2024-11-19 09:20:59,221 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-19 09:20:59,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-19 09:20:59,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 257 transitions. [2024-11-19 09:20:59,222 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6506329113924051 [2024-11-19 09:20:59,222 INFO L175 Difference]: Start difference. First operand has 78 places, 74 transitions, 219 flow. Second operand 5 states and 257 transitions. [2024-11-19 09:20:59,222 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 151 transitions, 649 flow [2024-11-19 09:20:59,239 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 151 transitions, 639 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-19 09:20:59,242 INFO L231 Difference]: Finished difference. Result has 83 places, 82 transitions, 308 flow [2024-11-19 09:20:59,242 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=79, PETRI_DIFFERENCE_MINUEND_FLOW=211, PETRI_DIFFERENCE_MINUEND_PLACES=76, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=74, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=308, PETRI_PLACES=83, PETRI_TRANSITIONS=82} [2024-11-19 09:20:59,243 INFO L277 CegarLoopForPetriNet]: 75 programPoint places, 8 predicate places. [2024-11-19 09:20:59,244 INFO L471 AbstractCegarLoop]: Abstraction has has 83 places, 82 transitions, 308 flow [2024-11-19 09:20:59,244 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 27.4) internal successors, (137), 5 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 09:20:59,244 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 09:20:59,245 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 09:20:59,245 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-11-19 09:20:59,245 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2024-11-19 09:20:59,245 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 09:20:59,245 INFO L85 PathProgramCache]: Analyzing trace with hash 870400787, now seen corresponding path program 1 times [2024-11-19 09:20:59,246 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 09:20:59,246 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [865370672] [2024-11-19 09:20:59,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 09:20:59,246 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 09:20:59,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 09:20:59,542 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 09:20:59,544 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 09:20:59,544 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [865370672] [2024-11-19 09:20:59,544 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [865370672] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 09:20:59,544 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [829064979] [2024-11-19 09:20:59,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 09:20:59,545 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 09:20:59,546 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 09:20:59,548 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) [2024-11-19 09:20:59,550 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-19 09:20:59,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 09:20:59,645 INFO L255 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 17 conjuncts are in the unsatisfiable core [2024-11-19 09:20:59,652 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 09:20:59,734 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-19 09:20:59,743 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 5 [2024-11-19 09:20:59,762 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-19 09:20:59,767 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-19 09:20:59,768 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2024-11-19 09:20:59,775 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-19 09:20:59,776 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-19 09:20:59,787 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-19 09:20:59,790 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-19 09:20:59,792 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2024-11-19 09:20:59,798 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-19 09:20:59,800 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-19 09:20:59,801 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2024-11-19 09:20:59,807 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-19 09:20:59,808 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-19 09:20:59,818 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-19 09:20:59,826 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-19 09:20:59,828 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-19 09:20:59,830 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2024-11-19 09:20:59,834 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-19 09:20:59,834 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-19 09:20:59,845 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-19 09:20:59,849 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-19 09:20:59,851 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 1 [2024-11-19 09:20:59,856 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-19 09:20:59,858 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-19 09:20:59,858 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-19 09:20:59,863 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-19 09:20:59,864 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-19 09:20:59,920 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 09:20:59,921 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 09:21:00,017 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-19 09:21:00,036 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 09:21:00,037 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [829064979] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-19 09:21:00,037 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-19 09:21:00,037 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3, 4] total 11 [2024-11-19 09:21:00,037 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [86275264] [2024-11-19 09:21:00,038 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-19 09:21:00,038 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-11-19 09:21:00,038 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 09:21:00,038 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-11-19 09:21:00,039 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2024-11-19 09:21:00,216 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 27 out of 79 [2024-11-19 09:21:00,217 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 83 places, 82 transitions, 308 flow. Second operand has 13 states, 13 states have (on average 28.846153846153847) internal successors, (375), 13 states have internal predecessors, (375), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 09:21:00,217 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 09:21:00,217 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 27 of 79 [2024-11-19 09:21:00,217 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 09:21:01,007 INFO L124 PetriNetUnfolderBase]: 2556/5107 cut-off events. [2024-11-19 09:21:01,008 INFO L125 PetriNetUnfolderBase]: For 2451/2451 co-relation queries the response was YES. [2024-11-19 09:21:01,022 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11470 conditions, 5107 events. 2556/5107 cut-off events. For 2451/2451 co-relation queries the response was YES. Maximal size of possible extension queue 183. Compared 36601 event pairs, 1733 based on Foata normal form. 24/4931 useless extension candidates. Maximal degree in co-relation 11457. Up to 3497 conditions per place. [2024-11-19 09:21:01,045 INFO L140 encePairwiseOnDemand]: 70/79 looper letters, 97 selfloop transitions, 9 changer transitions 0/130 dead transitions. [2024-11-19 09:21:01,046 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 88 places, 130 transitions, 624 flow [2024-11-19 09:21:01,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-19 09:21:01,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-19 09:21:01,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 260 transitions. [2024-11-19 09:21:01,047 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5485232067510548 [2024-11-19 09:21:01,047 INFO L175 Difference]: Start difference. First operand has 83 places, 82 transitions, 308 flow. Second operand 6 states and 260 transitions. [2024-11-19 09:21:01,047 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 88 places, 130 transitions, 624 flow [2024-11-19 09:21:01,052 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 87 places, 130 transitions, 619 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-19 09:21:01,054 INFO L231 Difference]: Finished difference. Result has 89 places, 83 transitions, 337 flow [2024-11-19 09:21:01,054 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=79, PETRI_DIFFERENCE_MINUEND_FLOW=303, PETRI_DIFFERENCE_MINUEND_PLACES=82, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=82, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=337, PETRI_PLACES=89, PETRI_TRANSITIONS=83} [2024-11-19 09:21:01,055 INFO L277 CegarLoopForPetriNet]: 75 programPoint places, 14 predicate places. [2024-11-19 09:21:01,055 INFO L471 AbstractCegarLoop]: Abstraction has has 89 places, 83 transitions, 337 flow [2024-11-19 09:21:01,055 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 28.846153846153847) internal successors, (375), 13 states have internal predecessors, (375), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 09:21:01,055 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 09:21:01,055 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1] [2024-11-19 09:21:01,073 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-11-19 09:21:01,259 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 [2024-11-19 09:21:01,260 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2024-11-19 09:21:01,260 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 09:21:01,260 INFO L85 PathProgramCache]: Analyzing trace with hash 1212621137, now seen corresponding path program 1 times [2024-11-19 09:21:01,260 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 09:21:01,260 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [540131898] [2024-11-19 09:21:01,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 09:21:01,261 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 09:21:01,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-11-19 09:21:01,277 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2024-11-19 09:21:01,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-11-19 09:21:01,310 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2024-11-19 09:21:01,310 INFO L325 BasicCegarLoop]: Counterexample is feasible [2024-11-19 09:21:01,312 INFO L782 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (14 of 15 remaining) [2024-11-19 09:21:01,313 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX (13 of 15 remaining) [2024-11-19 09:21:01,314 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1ASSERT_VIOLATIONARRAY_INDEX (12 of 15 remaining) [2024-11-19 09:21:01,314 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (11 of 15 remaining) [2024-11-19 09:21:01,314 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (10 of 15 remaining) [2024-11-19 09:21:01,314 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (9 of 15 remaining) [2024-11-19 09:21:01,315 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (8 of 15 remaining) [2024-11-19 09:21:01,315 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (7 of 15 remaining) [2024-11-19 09:21:01,315 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (6 of 15 remaining) [2024-11-19 09:21:01,315 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 15 remaining) [2024-11-19 09:21:01,319 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 15 remaining) [2024-11-19 09:21:01,319 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK (3 of 15 remaining) [2024-11-19 09:21:01,319 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 15 remaining) [2024-11-19 09:21:01,319 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location funcBErr0ASSERT_VIOLATIONMEMORY_LEAK (1 of 15 remaining) [2024-11-19 09:21:01,319 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location funcBErr0ASSERT_VIOLATIONMEMORY_LEAK (0 of 15 remaining) [2024-11-19 09:21:01,319 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-11-19 09:21:01,320 INFO L407 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 09:21:01,322 WARN L244 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2024-11-19 09:21:01,322 INFO L489 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2024-11-19 09:21:01,355 INFO L143 ThreadInstanceAdder]: Constructed 8 joinOtherThreadTransitions. [2024-11-19 09:21:01,357 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 113 places, 120 transitions, 284 flow [2024-11-19 09:21:01,392 INFO L124 PetriNetUnfolderBase]: 77/534 cut-off events. [2024-11-19 09:21:01,392 INFO L125 PetriNetUnfolderBase]: For 72/86 co-relation queries the response was YES. [2024-11-19 09:21:01,395 INFO L83 FinitePrefix]: Finished finitePrefix Result has 623 conditions, 534 events. 77/534 cut-off events. For 72/86 co-relation queries the response was YES. Maximal size of possible extension queue 36. Compared 3487 event pairs, 2 based on Foata normal form. 0/350 useless extension candidates. Maximal degree in co-relation 333. Up to 32 conditions per place. [2024-11-19 09:21:01,395 INFO L82 GeneralOperation]: Start removeDead. Operand has 113 places, 120 transitions, 284 flow [2024-11-19 09:21:01,398 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 113 places, 120 transitions, 284 flow [2024-11-19 09:21:01,399 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-19 09:21:01,399 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;@5b9bce26, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-19 09:21:01,399 INFO L334 AbstractCegarLoop]: Starting to check reachability of 16 error locations. [2024-11-19 09:21:01,401 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-11-19 09:21:01,401 INFO L124 PetriNetUnfolderBase]: 1/6 cut-off events. [2024-11-19 09:21:01,401 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-11-19 09:21:01,401 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 09:21:01,401 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2024-11-19 09:21:01,401 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 13 more)] === [2024-11-19 09:21:01,401 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 09:21:01,401 INFO L85 PathProgramCache]: Analyzing trace with hash 20215286, now seen corresponding path program 1 times [2024-11-19 09:21:01,401 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 09:21:01,401 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [745156944] [2024-11-19 09:21:01,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 09:21:01,402 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 09:21:01,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 09:21:01,409 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 09:21:01,410 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 09:21:01,410 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [745156944] [2024-11-19 09:21:01,410 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [745156944] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-19 09:21:01,410 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-19 09:21:01,410 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-11-19 09:21:01,410 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1742633912] [2024-11-19 09:21:01,410 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-19 09:21:01,410 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-11-19 09:21:01,411 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 09:21:01,411 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-11-19 09:21:01,411 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-11-19 09:21:01,411 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 42 out of 120 [2024-11-19 09:21:01,411 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 113 places, 120 transitions, 284 flow. Second operand has 2 states, 2 states have (on average 43.0) internal successors, (86), 2 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 09:21:01,411 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 09:21:01,412 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 42 of 120 [2024-11-19 09:21:01,412 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand