./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/weaver/popl20-min-max-inc.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 023d838f 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/weaver/popl20-min-max-inc.wvr.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 341ac5a9697f243416924cef7ae19a5e9bc693a5982154ab196fb2faacf237d5 --- Real Ultimate output --- This is Ultimate 0.2.5-tmp.fs.icfgbuilder-eval-023d838-m [2024-11-10 18:18:56,619 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-10 18:18:56,703 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2024-11-10 18:18:56,712 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-10 18:18:56,712 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-10 18:18:56,746 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-10 18:18:56,748 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-10 18:18:56,749 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-10 18:18:56,750 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-10 18:18:56,751 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-10 18:18:56,753 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-10 18:18:56,755 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-10 18:18:56,756 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-10 18:18:56,756 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-10 18:18:56,756 INFO L153 SettingsManager]: * Use SBE=true [2024-11-10 18:18:56,757 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-10 18:18:56,757 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-10 18:18:56,757 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-10 18:18:56,758 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-10 18:18:56,758 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-10 18:18:56,758 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2024-11-10 18:18:56,763 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2024-11-10 18:18:56,763 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2024-11-10 18:18:56,763 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-10 18:18:56,764 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-11-10 18:18:56,764 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-10 18:18:56,764 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2024-11-10 18:18:56,764 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-10 18:18:56,765 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-10 18:18:56,765 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2024-11-10 18:18:56,765 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-10 18:18:56,766 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-10 18:18:56,766 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-10 18:18:56,768 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-10 18:18:56,769 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-10 18:18:56,770 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-10 18:18:56,770 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-10 18:18:56,771 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-10 18:18:56,771 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-10 18:18:56,771 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-10 18:18:56,771 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-10 18:18:56,772 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-10 18:18:56,772 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 341ac5a9697f243416924cef7ae19a5e9bc693a5982154ab196fb2faacf237d5 [2024-11-10 18:18:57,037 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-10 18:18:57,070 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-10 18:18:57,074 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-10 18:18:57,076 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-10 18:18:57,076 INFO L274 PluginConnector]: CDTParser initialized [2024-11-10 18:18:57,078 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/weaver/popl20-min-max-inc.wvr.c [2024-11-10 18:18:58,772 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-10 18:18:58,976 INFO L384 CDTParser]: Found 1 translation units. [2024-11-10 18:18:58,977 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-min-max-inc.wvr.c [2024-11-10 18:18:58,984 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7559929c6/331ca8048ea1406399eeee51410cfd3e/FLAGc2e03d2bd [2024-11-10 18:18:59,353 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7559929c6/331ca8048ea1406399eeee51410cfd3e [2024-11-10 18:18:59,355 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-10 18:18:59,357 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-10 18:18:59,359 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-10 18:18:59,359 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-10 18:18:59,366 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-10 18:18:59,367 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.11 06:18:59" (1/1) ... [2024-11-10 18:18:59,368 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@38fc7a65 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 06:18:59, skipping insertion in model container [2024-11-10 18:18:59,368 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.11 06:18:59" (1/1) ... [2024-11-10 18:18:59,396 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-10 18:18:59,652 WARN L1072 CHandler]: saw a pointer cast to a type that we could not get a type size for, not adapting memory model [2024-11-10 18:18:59,655 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-10 18:18:59,665 INFO L200 MainTranslator]: Completed pre-run [2024-11-10 18:18:59,692 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-10 18:18:59,710 INFO L204 MainTranslator]: Completed translation [2024-11-10 18:18:59,711 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 06:18:59 WrapperNode [2024-11-10 18:18:59,711 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-10 18:18:59,712 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-10 18:18:59,712 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-10 18:18:59,712 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-10 18:18:59,720 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 06:18:59" (1/1) ... [2024-11-10 18:18:59,731 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 06:18:59" (1/1) ... [2024-11-10 18:18:59,762 INFO L138 Inliner]: procedures = 23, calls = 26, calls flagged for inlining = 9, calls inlined = 9, statements flattened = 118 [2024-11-10 18:18:59,763 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-10 18:18:59,764 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-10 18:18:59,764 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-10 18:18:59,764 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-10 18:18:59,776 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 06:18:59" (1/1) ... [2024-11-10 18:18:59,777 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 06:18:59" (1/1) ... [2024-11-10 18:18:59,780 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 06:18:59" (1/1) ... [2024-11-10 18:18:59,805 INFO L175 MemorySlicer]: Split 10 memory accesses to 2 slices as follows [2, 8]. 80 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0]. The 2 writes are split as follows [0, 2]. [2024-11-10 18:18:59,809 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 06:18:59" (1/1) ... [2024-11-10 18:18:59,810 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 06:18:59" (1/1) ... [2024-11-10 18:18:59,826 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 06:18:59" (1/1) ... [2024-11-10 18:18:59,827 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 06:18:59" (1/1) ... [2024-11-10 18:18:59,829 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 06:18:59" (1/1) ... [2024-11-10 18:18:59,830 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 06:18:59" (1/1) ... [2024-11-10 18:18:59,834 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-10 18:18:59,835 INFO L112 PluginConnector]: ------------------------IcfgBuilder---------------------------- [2024-11-10 18:18:59,835 INFO L270 PluginConnector]: Initializing IcfgBuilder... [2024-11-10 18:18:59,836 INFO L274 PluginConnector]: IcfgBuilder initialized [2024-11-10 18:18:59,837 INFO L184 PluginConnector]: Executing the observer IcfgBuilderObserver from plugin IcfgBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 06:18:59" (1/1) ... [2024-11-10 18:18:59,844 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-10 18:18:59,855 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-10 18:18:59,871 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) [2024-11-10 18:18:59,873 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 [2024-11-10 18:18:59,921 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-10 18:18:59,921 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2024-11-10 18:18:59,922 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2024-11-10 18:18:59,922 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2024-11-10 18:18:59,922 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2024-11-10 18:18:59,922 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2024-11-10 18:18:59,922 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2024-11-10 18:18:59,923 INFO L130 BoogieDeclarations]: Found specification of procedure thread4 [2024-11-10 18:18:59,923 INFO L138 BoogieDeclarations]: Found implementation of procedure thread4 [2024-11-10 18:18:59,923 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-10 18:18:59,923 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-11-10 18:18:59,923 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-11-10 18:18:59,923 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-11-10 18:18:59,924 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-11-10 18:18:59,924 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-10 18:18:59,924 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-10 18:18:59,924 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-11-10 18:18:59,924 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-11-10 18:18:59,926 WARN L225 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2024-11-10 18:19:00,040 INFO L256 CfgBuilder]: Building ICFG [2024-11-10 18:19:00,043 INFO L286 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-10 18:19:00,399 INFO L303 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-11-10 18:19:00,400 INFO L307 CfgBuilder]: Performing block encoding [2024-11-10 18:19:00,687 INFO L331 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-10 18:19:00,688 INFO L336 CfgBuilder]: Removed 0 assume(true) statements. [2024-11-10 18:19:00,689 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 10.11 06:19:00 BoogieIcfgContainer [2024-11-10 18:19:00,690 INFO L131 PluginConnector]: ------------------------ END IcfgBuilder---------------------------- [2024-11-10 18:19:00,692 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-10 18:19:00,692 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-10 18:19:00,698 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-10 18:19:00,701 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 10.11 06:18:59" (1/3) ... [2024-11-10 18:19:00,702 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@70c692f8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.11 06:19:00, skipping insertion in model container [2024-11-10 18:19:00,702 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 06:18:59" (2/3) ... [2024-11-10 18:19:00,702 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@70c692f8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.11 06:19:00, skipping insertion in model container [2024-11-10 18:19:00,702 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 10.11 06:19:00" (3/3) ... [2024-11-10 18:19:00,704 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-min-max-inc.wvr.c [2024-11-10 18:19:00,725 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-10 18:19:00,725 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 18 error locations. [2024-11-10 18:19:00,725 INFO L489 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-11-10 18:19:00,814 INFO L143 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2024-11-10 18:19:00,857 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 96 places, 93 transitions, 214 flow [2024-11-10 18:19:00,908 INFO L124 PetriNetUnfolderBase]: 10/89 cut-off events. [2024-11-10 18:19:00,908 INFO L125 PetriNetUnfolderBase]: For 4/4 co-relation queries the response was YES. [2024-11-10 18:19:00,915 INFO L83 FinitePrefix]: Finished finitePrefix Result has 106 conditions, 89 events. 10/89 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 255 event pairs, 0 based on Foata normal form. 0/61 useless extension candidates. Maximal degree in co-relation 81. Up to 2 conditions per place. [2024-11-10 18:19:00,916 INFO L82 GeneralOperation]: Start removeDead. Operand has 96 places, 93 transitions, 214 flow [2024-11-10 18:19:00,920 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 91 places, 88 transitions, 200 flow [2024-11-10 18:19:00,929 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-10 18:19:00,935 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;@3db90435, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-10 18:19:00,936 INFO L334 AbstractCegarLoop]: Starting to check reachability of 36 error locations. [2024-11-10 18:19:00,940 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-11-10 18:19:00,940 INFO L124 PetriNetUnfolderBase]: 2/9 cut-off events. [2024-11-10 18:19:00,940 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-11-10 18:19:00,940 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 18:19:00,943 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2024-11-10 18:19:00,943 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 33 more)] === [2024-11-10 18:19:00,948 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 18:19:00,949 INFO L85 PathProgramCache]: Analyzing trace with hash -2140071082, now seen corresponding path program 1 times [2024-11-10 18:19:00,956 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 18:19:00,957 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [293164547] [2024-11-10 18:19:00,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 18:19:00,958 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 18:19:01,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 18:19:01,278 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 18:19:01,278 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 18:19:01,279 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [293164547] [2024-11-10 18:19:01,279 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [293164547] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-10 18:19:01,279 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-10 18:19:01,280 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-10 18:19:01,282 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1940273504] [2024-11-10 18:19:01,283 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-10 18:19:01,293 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-10 18:19:01,300 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 18:19:01,332 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-10 18:19:01,333 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-10 18:19:01,343 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 28 out of 93 [2024-11-10 18:19:01,346 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 91 places, 88 transitions, 200 flow. Second operand has 3 states, 3 states have (on average 29.666666666666668) internal successors, (89), 3 states have internal predecessors, (89), 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) [2024-11-10 18:19:01,346 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 18:19:01,346 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 28 of 93 [2024-11-10 18:19:01,347 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 18:19:09,246 INFO L124 PetriNetUnfolderBase]: 59321/85455 cut-off events. [2024-11-10 18:19:09,247 INFO L125 PetriNetUnfolderBase]: For 2746/2746 co-relation queries the response was YES. [2024-11-10 18:19:09,473 INFO L83 FinitePrefix]: Finished finitePrefix Result has 164192 conditions, 85455 events. 59321/85455 cut-off events. For 2746/2746 co-relation queries the response was YES. Maximal size of possible extension queue 3689. Compared 662080 event pairs, 45080 based on Foata normal form. 6395/64017 useless extension candidates. Maximal degree in co-relation 159263. Up to 75032 conditions per place. [2024-11-10 18:19:10,202 INFO L140 encePairwiseOnDemand]: 83/93 looper letters, 54 selfloop transitions, 2 changer transitions 0/79 dead transitions. [2024-11-10 18:19:10,202 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 88 places, 79 transitions, 294 flow [2024-11-10 18:19:10,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-10 18:19:10,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-10 18:19:10,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 148 transitions. [2024-11-10 18:19:10,218 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5304659498207885 [2024-11-10 18:19:10,220 INFO L175 Difference]: Start difference. First operand has 91 places, 88 transitions, 200 flow. Second operand 3 states and 148 transitions. [2024-11-10 18:19:10,221 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 88 places, 79 transitions, 294 flow [2024-11-10 18:19:10,289 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 79 transitions, 278 flow, removed 0 selfloop flow, removed 8 redundant places. [2024-11-10 18:19:10,293 INFO L231 Difference]: Finished difference. Result has 80 places, 79 transitions, 170 flow [2024-11-10 18:19:10,295 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=93, PETRI_DIFFERENCE_MINUEND_FLOW=166, PETRI_DIFFERENCE_MINUEND_PLACES=78, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=79, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=77, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=170, PETRI_PLACES=80, PETRI_TRANSITIONS=79} [2024-11-10 18:19:10,303 INFO L277 CegarLoopForPetriNet]: 91 programPoint places, -11 predicate places. [2024-11-10 18:19:10,304 INFO L471 AbstractCegarLoop]: Abstraction has has 80 places, 79 transitions, 170 flow [2024-11-10 18:19:10,304 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 29.666666666666668) internal successors, (89), 3 states have internal predecessors, (89), 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) [2024-11-10 18:19:10,305 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 18:19:10,305 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2024-11-10 18:19:10,306 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-10 18:19:10,306 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 33 more)] === [2024-11-10 18:19:10,307 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 18:19:10,308 INFO L85 PathProgramCache]: Analyzing trace with hash -2140071081, now seen corresponding path program 1 times [2024-11-10 18:19:10,308 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 18:19:10,309 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1485330796] [2024-11-10 18:19:10,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 18:19:10,310 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 18:19:10,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 18:19:10,749 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 18:19:10,749 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 18:19:10,749 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1485330796] [2024-11-10 18:19:10,750 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1485330796] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-10 18:19:10,750 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-10 18:19:10,750 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-10 18:19:10,750 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1005935528] [2024-11-10 18:19:10,750 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-10 18:19:10,753 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-10 18:19:10,754 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 18:19:10,754 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-10 18:19:10,755 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-11-10 18:19:10,798 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 27 out of 93 [2024-11-10 18:19:10,799 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 80 places, 79 transitions, 170 flow. Second operand has 6 states, 6 states have (on average 27.833333333333332) internal successors, (167), 6 states have internal predecessors, (167), 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) [2024-11-10 18:19:10,801 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 18:19:10,801 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 27 of 93 [2024-11-10 18:19:10,801 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 18:19:16,072 INFO L124 PetriNetUnfolderBase]: 59321/85458 cut-off events. [2024-11-10 18:19:16,073 INFO L125 PetriNetUnfolderBase]: For 360/360 co-relation queries the response was YES. [2024-11-10 18:19:16,221 INFO L83 FinitePrefix]: Finished finitePrefix Result has 162087 conditions, 85458 events. 59321/85458 cut-off events. For 360/360 co-relation queries the response was YES. Maximal size of possible extension queue 3689. Compared 662137 event pairs, 45080 based on Foata normal form. 0/57623 useless extension candidates. Maximal degree in co-relation 162060. Up to 75034 conditions per place. [2024-11-10 18:19:16,644 INFO L140 encePairwiseOnDemand]: 88/93 looper letters, 57 selfloop transitions, 3 changer transitions 0/81 dead transitions. [2024-11-10 18:19:16,644 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 84 places, 81 transitions, 294 flow [2024-11-10 18:19:16,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-10 18:19:16,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-10 18:19:16,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 197 transitions. [2024-11-10 18:19:16,649 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4236559139784946 [2024-11-10 18:19:16,650 INFO L175 Difference]: Start difference. First operand has 80 places, 79 transitions, 170 flow. Second operand 5 states and 197 transitions. [2024-11-10 18:19:16,650 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 84 places, 81 transitions, 294 flow [2024-11-10 18:19:16,652 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 82 places, 81 transitions, 290 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-10 18:19:16,655 INFO L231 Difference]: Finished difference. Result has 83 places, 80 transitions, 182 flow [2024-11-10 18:19:16,655 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=93, PETRI_DIFFERENCE_MINUEND_FLOW=166, PETRI_DIFFERENCE_MINUEND_PLACES=78, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=79, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=76, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=182, PETRI_PLACES=83, PETRI_TRANSITIONS=80} [2024-11-10 18:19:16,656 INFO L277 CegarLoopForPetriNet]: 91 programPoint places, -8 predicate places. [2024-11-10 18:19:16,656 INFO L471 AbstractCegarLoop]: Abstraction has has 83 places, 80 transitions, 182 flow [2024-11-10 18:19:16,657 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 27.833333333333332) internal successors, (167), 6 states have internal predecessors, (167), 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) [2024-11-10 18:19:16,657 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 18:19:16,657 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1] [2024-11-10 18:19:16,657 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-10 18:19:16,659 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 33 more)] === [2024-11-10 18:19:16,659 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 18:19:16,660 INFO L85 PathProgramCache]: Analyzing trace with hash -362565092, now seen corresponding path program 1 times [2024-11-10 18:19:16,661 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 18:19:16,661 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1298102130] [2024-11-10 18:19:16,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 18:19:16,663 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 18:19:16,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 18:19:17,020 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 18:19:17,021 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 18:19:17,022 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1298102130] [2024-11-10 18:19:17,022 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1298102130] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-10 18:19:17,022 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [297534341] [2024-11-10 18:19:17,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 18:19:17,023 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-10 18:19:17,023 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-10 18:19:17,025 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) [2024-11-10 18:19:17,027 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-10 18:19:17,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 18:19:17,152 INFO L255 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 17 conjuncts are in the unsatisfiable core [2024-11-10 18:19:17,157 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-10 18:19:17,246 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 10 treesize of output 9 [2024-11-10 18:19:17,515 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 18:19:17,516 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-10 18:19:17,995 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 18:19:17,999 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [297534341] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-10 18:19:18,000 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-10 18:19:18,000 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 13 [2024-11-10 18:19:18,000 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [937529809] [2024-11-10 18:19:18,000 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-10 18:19:18,001 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-11-10 18:19:18,001 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 18:19:18,003 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-11-10 18:19:18,003 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=166, Unknown=0, NotChecked=0, Total=210 [2024-11-10 18:19:18,202 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 27 out of 93 [2024-11-10 18:19:18,203 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 83 places, 80 transitions, 182 flow. Second operand has 15 states, 15 states have (on average 28.266666666666666) internal successors, (424), 15 states have internal predecessors, (424), 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) [2024-11-10 18:19:18,204 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 18:19:18,204 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 27 of 93 [2024-11-10 18:19:18,204 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 18:19:23,573 INFO L124 PetriNetUnfolderBase]: 59322/85462 cut-off events. [2024-11-10 18:19:23,574 INFO L125 PetriNetUnfolderBase]: For 363/363 co-relation queries the response was YES. [2024-11-10 18:19:23,713 INFO L83 FinitePrefix]: Finished finitePrefix Result has 162101 conditions, 85462 events. 59322/85462 cut-off events. For 363/363 co-relation queries the response was YES. Maximal size of possible extension queue 3689. Compared 662256 event pairs, 45080 based on Foata normal form. 0/57629 useless extension candidates. Maximal degree in co-relation 162082. Up to 75030 conditions per place. [2024-11-10 18:19:24,173 INFO L140 encePairwiseOnDemand]: 87/93 looper letters, 54 selfloop transitions, 9 changer transitions 0/84 dead transitions. [2024-11-10 18:19:24,174 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 90 places, 84 transitions, 318 flow [2024-11-10 18:19:24,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-10 18:19:24,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-11-10 18:19:24,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 308 transitions. [2024-11-10 18:19:24,185 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.36798088410991636 [2024-11-10 18:19:24,185 INFO L175 Difference]: Start difference. First operand has 83 places, 80 transitions, 182 flow. Second operand 9 states and 308 transitions. [2024-11-10 18:19:24,185 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 90 places, 84 transitions, 318 flow [2024-11-10 18:19:24,190 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 88 places, 84 transitions, 315 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-10 18:19:24,196 INFO L231 Difference]: Finished difference. Result has 88 places, 83 transitions, 205 flow [2024-11-10 18:19:24,197 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=93, PETRI_DIFFERENCE_MINUEND_FLOW=175, PETRI_DIFFERENCE_MINUEND_PLACES=80, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=79, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=205, PETRI_PLACES=88, PETRI_TRANSITIONS=83} [2024-11-10 18:19:24,200 INFO L277 CegarLoopForPetriNet]: 91 programPoint places, -3 predicate places. [2024-11-10 18:19:24,201 INFO L471 AbstractCegarLoop]: Abstraction has has 88 places, 83 transitions, 205 flow [2024-11-10 18:19:24,202 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 28.266666666666666) internal successors, (424), 15 states have internal predecessors, (424), 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) [2024-11-10 18:19:24,202 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 18:19:24,202 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-10 18:19:24,229 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-11-10 18:19:24,403 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-10 18:19:24,404 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 33 more)] === [2024-11-10 18:19:24,404 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 18:19:24,404 INFO L85 PathProgramCache]: Analyzing trace with hash 663670459, now seen corresponding path program 1 times [2024-11-10 18:19:24,405 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 18:19:24,405 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1281141477] [2024-11-10 18:19:24,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 18:19:24,405 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 18:19:24,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 18:19:24,456 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 18:19:24,458 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 18:19:24,458 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1281141477] [2024-11-10 18:19:24,458 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1281141477] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-10 18:19:24,458 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-10 18:19:24,458 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-10 18:19:24,459 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [273859282] [2024-11-10 18:19:24,459 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-10 18:19:24,459 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-10 18:19:24,460 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 18:19:24,461 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-10 18:19:24,462 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-10 18:19:24,468 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 28 out of 93 [2024-11-10 18:19:24,469 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 88 places, 83 transitions, 205 flow. Second operand has 4 states, 4 states have (on average 30.0) internal successors, (120), 4 states have internal predecessors, (120), 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) [2024-11-10 18:19:24,469 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 18:19:24,469 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 28 of 93 [2024-11-10 18:19:24,469 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 18:19:27,601 INFO L124 PetriNetUnfolderBase]: 32962/48912 cut-off events. [2024-11-10 18:19:27,602 INFO L125 PetriNetUnfolderBase]: For 246/246 co-relation queries the response was YES. [2024-11-10 18:19:27,692 INFO L83 FinitePrefix]: Finished finitePrefix Result has 91702 conditions, 48912 events. 32962/48912 cut-off events. For 246/246 co-relation queries the response was YES. Maximal size of possible extension queue 2023. Compared 369926 event pairs, 24908 based on Foata normal form. 0/37263 useless extension candidates. Maximal degree in co-relation 91680. Up to 41857 conditions per place. [2024-11-10 18:19:27,858 INFO L140 encePairwiseOnDemand]: 85/93 looper letters, 52 selfloop transitions, 3 changer transitions 0/77 dead transitions. [2024-11-10 18:19:27,859 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 85 places, 77 transitions, 303 flow [2024-11-10 18:19:27,859 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-10 18:19:27,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-10 18:19:27,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 168 transitions. [2024-11-10 18:19:27,860 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.45161290322580644 [2024-11-10 18:19:27,861 INFO L175 Difference]: Start difference. First operand has 88 places, 83 transitions, 205 flow. Second operand 4 states and 168 transitions. [2024-11-10 18:19:27,861 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 85 places, 77 transitions, 303 flow [2024-11-10 18:19:27,862 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 82 places, 77 transitions, 294 flow, removed 2 selfloop flow, removed 3 redundant places. [2024-11-10 18:19:27,863 INFO L231 Difference]: Finished difference. Result has 82 places, 77 transitions, 190 flow [2024-11-10 18:19:27,864 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=93, PETRI_DIFFERENCE_MINUEND_FLOW=184, PETRI_DIFFERENCE_MINUEND_PLACES=79, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=77, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=74, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=190, PETRI_PLACES=82, PETRI_TRANSITIONS=77} [2024-11-10 18:19:27,864 INFO L277 CegarLoopForPetriNet]: 91 programPoint places, -9 predicate places. [2024-11-10 18:19:27,865 INFO L471 AbstractCegarLoop]: Abstraction has has 82 places, 77 transitions, 190 flow [2024-11-10 18:19:27,865 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 30.0) internal successors, (120), 4 states have internal predecessors, (120), 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) [2024-11-10 18:19:27,865 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 18:19:27,865 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-10 18:19:27,865 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-11-10 18:19:27,866 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 33 more)] === [2024-11-10 18:19:27,866 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 18:19:27,866 INFO L85 PathProgramCache]: Analyzing trace with hash 663670460, now seen corresponding path program 1 times [2024-11-10 18:19:27,866 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 18:19:27,867 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [207406584] [2024-11-10 18:19:27,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 18:19:27,867 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 18:19:27,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 18:19:28,031 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 18:19:28,031 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 18:19:28,031 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [207406584] [2024-11-10 18:19:28,031 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [207406584] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-10 18:19:28,031 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2028994439] [2024-11-10 18:19:28,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 18:19:28,032 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-10 18:19:28,032 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-10 18:19:28,034 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) [2024-11-10 18:19:28,036 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-10 18:19:28,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 18:19:28,103 INFO L255 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 13 conjuncts are in the unsatisfiable core [2024-11-10 18:19:28,104 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-10 18:19:28,118 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 [2024-11-10 18:19:28,179 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 18:19:28,180 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-10 18:19:28,246 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 18:19:28,246 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2028994439] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-10 18:19:28,246 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-11-10 18:19:28,247 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5, 4] total 9 [2024-11-10 18:19:28,247 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [866715595] [2024-11-10 18:19:28,247 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-10 18:19:28,247 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-10 18:19:28,248 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 18:19:28,248 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-10 18:19:28,248 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-11-10 18:19:28,260 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 29 out of 93 [2024-11-10 18:19:28,260 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 82 places, 77 transitions, 190 flow. Second operand has 5 states, 5 states have (on average 30.6) internal successors, (153), 5 states have internal predecessors, (153), 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) [2024-11-10 18:19:28,260 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 18:19:28,261 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 29 of 93 [2024-11-10 18:19:28,261 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 18:19:31,075 INFO L124 PetriNetUnfolderBase]: 27448/40992 cut-off events. [2024-11-10 18:19:31,076 INFO L125 PetriNetUnfolderBase]: For 228/228 co-relation queries the response was YES. [2024-11-10 18:19:31,169 INFO L83 FinitePrefix]: Finished finitePrefix Result has 76500 conditions, 40992 events. 27448/40992 cut-off events. For 228/228 co-relation queries the response was YES. Maximal size of possible extension queue 1743. Compared 307877 event pairs, 20228 based on Foata normal form. 0/32272 useless extension candidates. Maximal degree in co-relation 76479. Up to 34744 conditions per place. [2024-11-10 18:19:31,348 INFO L140 encePairwiseOnDemand]: 88/93 looper letters, 49 selfloop transitions, 4 changer transitions 0/75 dead transitions. [2024-11-10 18:19:31,348 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 84 places, 75 transitions, 292 flow [2024-11-10 18:19:31,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-10 18:19:31,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-10 18:19:31,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 197 transitions. [2024-11-10 18:19:31,350 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4236559139784946 [2024-11-10 18:19:31,350 INFO L175 Difference]: Start difference. First operand has 82 places, 77 transitions, 190 flow. Second operand 5 states and 197 transitions. [2024-11-10 18:19:31,350 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 84 places, 75 transitions, 292 flow [2024-11-10 18:19:31,352 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 82 places, 75 transitions, 288 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-10 18:19:31,353 INFO L231 Difference]: Finished difference. Result has 82 places, 75 transitions, 190 flow [2024-11-10 18:19:31,354 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=93, PETRI_DIFFERENCE_MINUEND_FLOW=182, PETRI_DIFFERENCE_MINUEND_PLACES=78, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=75, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=71, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=190, PETRI_PLACES=82, PETRI_TRANSITIONS=75} [2024-11-10 18:19:31,354 INFO L277 CegarLoopForPetriNet]: 91 programPoint places, -9 predicate places. [2024-11-10 18:19:31,355 INFO L471 AbstractCegarLoop]: Abstraction has has 82 places, 75 transitions, 190 flow [2024-11-10 18:19:31,355 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 30.6) internal successors, (153), 5 states have internal predecessors, (153), 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) [2024-11-10 18:19:31,355 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 18:19:31,355 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-10 18:19:31,369 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-11-10 18:19:31,555 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-10 18:19:31,556 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting thread3Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 33 more)] === [2024-11-10 18:19:31,557 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 18:19:31,557 INFO L85 PathProgramCache]: Analyzing trace with hash 397373343, now seen corresponding path program 1 times [2024-11-10 18:19:31,557 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 18:19:31,557 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1496099995] [2024-11-10 18:19:31,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 18:19:31,557 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 18:19:31,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 18:19:31,771 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 18:19:31,772 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 18:19:31,772 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1496099995] [2024-11-10 18:19:31,772 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1496099995] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-10 18:19:31,773 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1508954644] [2024-11-10 18:19:31,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 18:19:31,773 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-10 18:19:31,773 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-10 18:19:31,775 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-10 18:19:31,777 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-10 18:19:31,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 18:19:31,858 INFO L255 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-11-10 18:19:31,860 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-10 18:19:31,985 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 18:19:31,987 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-10 18:19:32,075 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 18 [2024-11-10 18:19:32,092 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 18:19:32,093 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1508954644] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-10 18:19:32,093 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-10 18:19:32,093 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2024-11-10 18:19:32,093 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [353517366] [2024-11-10 18:19:32,094 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-10 18:19:32,094 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-11-10 18:19:32,094 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 18:19:32,095 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-11-10 18:19:32,096 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2024-11-10 18:19:32,165 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 29 out of 93 [2024-11-10 18:19:32,166 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 82 places, 75 transitions, 190 flow. Second operand has 11 states, 11 states have (on average 31.363636363636363) internal successors, (345), 11 states have internal predecessors, (345), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 18:19:32,166 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 18:19:32,166 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 29 of 93 [2024-11-10 18:19:32,167 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 18:19:36,114 INFO L124 PetriNetUnfolderBase]: 42209/59695 cut-off events. [2024-11-10 18:19:36,114 INFO L125 PetriNetUnfolderBase]: For 406/406 co-relation queries the response was YES. [2024-11-10 18:19:36,238 INFO L83 FinitePrefix]: Finished finitePrefix Result has 113992 conditions, 59695 events. 42209/59695 cut-off events. For 406/406 co-relation queries the response was YES. Maximal size of possible extension queue 2297. Compared 419509 event pairs, 10502 based on Foata normal form. 0/51400 useless extension candidates. Maximal degree in co-relation 113970. Up to 19718 conditions per place. [2024-11-10 18:19:36,474 INFO L140 encePairwiseOnDemand]: 84/93 looper letters, 100 selfloop transitions, 9 changer transitions 0/131 dead transitions. [2024-11-10 18:19:36,474 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 87 places, 131 transitions, 526 flow [2024-11-10 18:19:36,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-10 18:19:36,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-11-10 18:19:36,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 312 transitions. [2024-11-10 18:19:36,476 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4792626728110599 [2024-11-10 18:19:36,476 INFO L175 Difference]: Start difference. First operand has 82 places, 75 transitions, 190 flow. Second operand 7 states and 312 transitions. [2024-11-10 18:19:36,476 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 87 places, 131 transitions, 526 flow [2024-11-10 18:19:36,478 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 84 places, 131 transitions, 520 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-11-10 18:19:36,480 INFO L231 Difference]: Finished difference. Result has 86 places, 77 transitions, 222 flow [2024-11-10 18:19:36,480 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=93, PETRI_DIFFERENCE_MINUEND_FLOW=182, PETRI_DIFFERENCE_MINUEND_PLACES=78, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=74, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=222, PETRI_PLACES=86, PETRI_TRANSITIONS=77} [2024-11-10 18:19:36,481 INFO L277 CegarLoopForPetriNet]: 91 programPoint places, -5 predicate places. [2024-11-10 18:19:36,481 INFO L471 AbstractCegarLoop]: Abstraction has has 86 places, 77 transitions, 222 flow [2024-11-10 18:19:36,482 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 31.363636363636363) internal successors, (345), 11 states have internal predecessors, (345), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 18:19:36,482 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 18:19:36,482 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-10 18:19:36,496 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2024-11-10 18:19:36,683 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-10 18:19:36,683 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 33 more)] === [2024-11-10 18:19:36,684 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 18:19:36,684 INFO L85 PathProgramCache]: Analyzing trace with hash 400447098, now seen corresponding path program 1 times [2024-11-10 18:19:36,685 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 18:19:36,685 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [274521223] [2024-11-10 18:19:36,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 18:19:36,685 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 18:19:36,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 18:19:36,946 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 18:19:36,947 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 18:19:36,947 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [274521223] [2024-11-10 18:19:36,947 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [274521223] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-10 18:19:36,947 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [465333129] [2024-11-10 18:19:36,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 18:19:36,948 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-10 18:19:36,948 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-10 18:19:36,950 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-10 18:19:36,951 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-10 18:19:37,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 18:19:37,023 INFO L255 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 5 conjuncts are in the unsatisfiable core [2024-11-10 18:19:37,025 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-10 18:19:37,083 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-10 18:19:37,084 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-10 18:19:37,084 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [465333129] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-10 18:19:37,084 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-10 18:19:37,084 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 8 [2024-11-10 18:19:37,085 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1043403736] [2024-11-10 18:19:37,085 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-10 18:19:37,085 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-10 18:19:37,086 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 18:19:37,086 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-10 18:19:37,086 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-11-10 18:19:37,093 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 28 out of 93 [2024-11-10 18:19:37,094 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 77 transitions, 222 flow. Second operand has 4 states, 4 states have (on average 31.0) internal successors, (124), 4 states have internal predecessors, (124), 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) [2024-11-10 18:19:37,094 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 18:19:37,094 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 28 of 93 [2024-11-10 18:19:37,094 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 18:19:41,910 INFO L124 PetriNetUnfolderBase]: 48801/77166 cut-off events. [2024-11-10 18:19:41,911 INFO L125 PetriNetUnfolderBase]: For 18526/18526 co-relation queries the response was YES. [2024-11-10 18:19:42,121 INFO L83 FinitePrefix]: Finished finitePrefix Result has 154142 conditions, 77166 events. 48801/77166 cut-off events. For 18526/18526 co-relation queries the response was YES. Maximal size of possible extension queue 2437. Compared 649304 event pairs, 6747 based on Foata normal form. 0/67407 useless extension candidates. Maximal degree in co-relation 154118. Up to 44274 conditions per place. [2024-11-10 18:19:42,383 INFO L140 encePairwiseOnDemand]: 87/93 looper letters, 107 selfloop transitions, 5 changer transitions 0/133 dead transitions. [2024-11-10 18:19:42,383 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 89 places, 133 transitions, 612 flow [2024-11-10 18:19:42,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-10 18:19:42,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-10 18:19:42,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 211 transitions. [2024-11-10 18:19:42,385 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5672043010752689 [2024-11-10 18:19:42,385 INFO L175 Difference]: Start difference. First operand has 86 places, 77 transitions, 222 flow. Second operand 4 states and 211 transitions. [2024-11-10 18:19:42,385 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 89 places, 133 transitions, 612 flow [2024-11-10 18:19:42,395 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 86 places, 133 transitions, 606 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-11-10 18:19:42,397 INFO L231 Difference]: Finished difference. Result has 88 places, 81 transitions, 249 flow [2024-11-10 18:19:42,397 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=93, PETRI_DIFFERENCE_MINUEND_FLOW=216, PETRI_DIFFERENCE_MINUEND_PLACES=83, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=77, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=72, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=249, PETRI_PLACES=88, PETRI_TRANSITIONS=81} [2024-11-10 18:19:42,398 INFO L277 CegarLoopForPetriNet]: 91 programPoint places, -3 predicate places. [2024-11-10 18:19:42,398 INFO L471 AbstractCegarLoop]: Abstraction has has 88 places, 81 transitions, 249 flow [2024-11-10 18:19:42,398 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 31.0) internal successors, (124), 4 states have internal predecessors, (124), 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) [2024-11-10 18:19:42,398 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 18:19:42,399 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-10 18:19:42,412 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-11-10 18:19:42,600 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-10 18:19:42,601 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 33 more)] === [2024-11-10 18:19:42,601 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 18:19:42,601 INFO L85 PathProgramCache]: Analyzing trace with hash -944589040, now seen corresponding path program 1 times [2024-11-10 18:19:42,601 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 18:19:42,601 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1651913732] [2024-11-10 18:19:42,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 18:19:42,602 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 18:19:42,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 18:19:42,809 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 18:19:42,811 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 18:19:42,811 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1651913732] [2024-11-10 18:19:42,811 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1651913732] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-10 18:19:42,812 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1677097521] [2024-11-10 18:19:42,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 18:19:42,812 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-10 18:19:42,812 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-10 18:19:42,814 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-10 18:19:42,816 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-10 18:19:42,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 18:19:42,886 INFO L255 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 5 conjuncts are in the unsatisfiable core [2024-11-10 18:19:42,887 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-10 18:19:42,938 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-10 18:19:42,939 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-10 18:19:42,939 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1677097521] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-10 18:19:42,939 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-10 18:19:42,939 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 8 [2024-11-10 18:19:42,939 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1165532458] [2024-11-10 18:19:42,939 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-10 18:19:42,939 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-10 18:19:42,940 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 18:19:42,940 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-10 18:19:42,940 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-11-10 18:19:42,950 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 28 out of 93 [2024-11-10 18:19:42,951 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 88 places, 81 transitions, 249 flow. Second operand has 4 states, 4 states have (on average 31.5) internal successors, (126), 4 states have internal predecessors, (126), 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) [2024-11-10 18:19:42,951 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 18:19:42,951 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 28 of 93 [2024-11-10 18:19:42,951 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 18:19:49,886 INFO L124 PetriNetUnfolderBase]: 65659/99700 cut-off events. [2024-11-10 18:19:49,887 INFO L125 PetriNetUnfolderBase]: For 32643/35163 co-relation queries the response was YES. [2024-11-10 18:19:50,224 INFO L83 FinitePrefix]: Finished finitePrefix Result has 219244 conditions, 99700 events. 65659/99700 cut-off events. For 32643/35163 co-relation queries the response was YES. Maximal size of possible extension queue 2780. Compared 809875 event pairs, 20007 based on Foata normal form. 2520/92685 useless extension candidates. Maximal degree in co-relation 219221. Up to 61131 conditions per place. [2024-11-10 18:19:50,608 INFO L140 encePairwiseOnDemand]: 87/93 looper letters, 110 selfloop transitions, 5 changer transitions 0/136 dead transitions. [2024-11-10 18:19:50,608 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 91 places, 136 transitions, 657 flow [2024-11-10 18:19:50,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-10 18:19:50,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-10 18:19:50,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 210 transitions. [2024-11-10 18:19:50,610 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5645161290322581 [2024-11-10 18:19:50,610 INFO L175 Difference]: Start difference. First operand has 88 places, 81 transitions, 249 flow. Second operand 4 states and 210 transitions. [2024-11-10 18:19:50,610 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 91 places, 136 transitions, 657 flow [2024-11-10 18:19:50,633 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 90 places, 136 transitions, 650 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-10 18:19:50,634 INFO L231 Difference]: Finished difference. Result has 91 places, 83 transitions, 267 flow [2024-11-10 18:19:50,635 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=93, PETRI_DIFFERENCE_MINUEND_FLOW=244, PETRI_DIFFERENCE_MINUEND_PLACES=87, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=81, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=76, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=267, PETRI_PLACES=91, PETRI_TRANSITIONS=83} [2024-11-10 18:19:50,635 INFO L277 CegarLoopForPetriNet]: 91 programPoint places, 0 predicate places. [2024-11-10 18:19:50,635 INFO L471 AbstractCegarLoop]: Abstraction has has 91 places, 83 transitions, 267 flow [2024-11-10 18:19:50,636 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 31.5) internal successors, (126), 4 states have internal predecessors, (126), 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) [2024-11-10 18:19:50,636 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 18:19:50,636 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-10 18:19:50,649 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2024-11-10 18:19:50,836 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-10 18:19:50,837 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting thread3Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 33 more)] === [2024-11-10 18:19:50,837 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 18:19:50,837 INFO L85 PathProgramCache]: Analyzing trace with hash -45122278, now seen corresponding path program 1 times [2024-11-10 18:19:50,837 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 18:19:50,837 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1312459226] [2024-11-10 18:19:50,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 18:19:50,838 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 18:19:50,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 18:19:50,953 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 18:19:50,953 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 18:19:50,953 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1312459226] [2024-11-10 18:19:50,954 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1312459226] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-10 18:19:50,954 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2040508863] [2024-11-10 18:19:50,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 18:19:50,954 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-10 18:19:50,954 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-10 18:19:50,956 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-10 18:19:50,958 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-10 18:19:51,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 18:19:51,042 INFO L255 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-10 18:19:51,043 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-10 18:19:51,132 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 18:19:51,133 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-10 18:19:51,218 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 18:19:51,218 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2040508863] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-10 18:19:51,218 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-10 18:19:51,219 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 14 [2024-11-10 18:19:51,219 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [838020222] [2024-11-10 18:19:51,219 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-10 18:19:51,219 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-11-10 18:19:51,220 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 18:19:51,220 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-11-10 18:19:51,221 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=126, Unknown=0, NotChecked=0, Total=182 [2024-11-10 18:19:51,308 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 26 out of 93 [2024-11-10 18:19:51,309 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 91 places, 83 transitions, 267 flow. Second operand has 14 states, 14 states have (on average 28.928571428571427) internal successors, (405), 14 states have internal predecessors, (405), 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) [2024-11-10 18:19:51,309 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 18:19:51,309 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 26 of 93 [2024-11-10 18:19:51,309 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand