./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/weaver/popl20-min-max-dec.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 8be7027f 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-dec.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 47814a6c2066a31334f0b50a42e69cfeb567d5dd7f02dc6c703588c90e067366 --- Real Ultimate output --- This is Ultimate 0.2.5-wip.dk.perfect-tracechecks-8be7027-m [2024-11-12 16:28:10,679 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-12 16:28:10,754 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2024-11-12 16:28:10,756 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-12 16:28:10,756 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-12 16:28:10,780 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-12 16:28:10,781 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-12 16:28:10,781 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-12 16:28:10,781 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-12 16:28:10,781 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-12 16:28:10,782 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-12 16:28:10,782 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-12 16:28:10,783 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-12 16:28:10,785 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-12 16:28:10,786 INFO L153 SettingsManager]: * Use SBE=true [2024-11-12 16:28:10,786 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-12 16:28:10,786 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-12 16:28:10,786 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-12 16:28:10,786 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-12 16:28:10,786 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-12 16:28:10,787 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2024-11-12 16:28:10,788 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2024-11-12 16:28:10,788 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2024-11-12 16:28:10,788 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-12 16:28:10,788 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-11-12 16:28:10,788 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-12 16:28:10,788 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2024-11-12 16:28:10,788 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-12 16:28:10,788 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-12 16:28:10,789 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-12 16:28:10,789 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-12 16:28:10,789 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-12 16:28:10,789 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-12 16:28:10,789 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-12 16:28:10,789 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-12 16:28:10,789 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-12 16:28:10,789 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-12 16:28:10,790 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-12 16:28:10,790 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-12 16:28:10,790 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-12 16:28:10,790 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-12 16:28:10,791 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-12 16:28:10,791 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 47814a6c2066a31334f0b50a42e69cfeb567d5dd7f02dc6c703588c90e067366 [2024-11-12 16:28:10,980 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-12 16:28:11,001 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-12 16:28:11,003 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-12 16:28:11,004 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-12 16:28:11,004 INFO L274 PluginConnector]: CDTParser initialized [2024-11-12 16:28:11,005 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/weaver/popl20-min-max-dec.wvr.c [2024-11-12 16:28:12,187 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-12 16:28:12,328 INFO L384 CDTParser]: Found 1 translation units. [2024-11-12 16:28:12,329 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-min-max-dec.wvr.c [2024-11-12 16:28:12,335 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/61f0ac22e/cb21d43c78fc435fb3937dfcb7afd026/FLAGf11808689 [2024-11-12 16:28:12,347 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/61f0ac22e/cb21d43c78fc435fb3937dfcb7afd026 [2024-11-12 16:28:12,349 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-12 16:28:12,350 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-12 16:28:12,352 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-12 16:28:12,352 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-12 16:28:12,356 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-12 16:28:12,357 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 04:28:12" (1/1) ... [2024-11-12 16:28:12,357 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@479495c9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 04:28:12, skipping insertion in model container [2024-11-12 16:28:12,357 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 04:28:12" (1/1) ... [2024-11-12 16:28:12,374 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-12 16:28:12,554 WARN L1070 CHandler]: saw a pointer cast to a type that we could not get a type size for, not adapting memory model [2024-11-12 16:28:12,556 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-12 16:28:12,562 INFO L200 MainTranslator]: Completed pre-run [2024-11-12 16:28:12,597 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-12 16:28:12,617 INFO L204 MainTranslator]: Completed translation [2024-11-12 16:28:12,618 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 04:28:12 WrapperNode [2024-11-12 16:28:12,618 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-12 16:28:12,619 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-12 16:28:12,619 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-12 16:28:12,619 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-12 16:28:12,624 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 04:28:12" (1/1) ... [2024-11-12 16:28:12,629 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 04:28:12" (1/1) ... [2024-11-12 16:28:12,647 INFO L138 Inliner]: procedures = 23, calls = 26, calls flagged for inlining = 9, calls inlined = 9, statements flattened = 120 [2024-11-12 16:28:12,648 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-12 16:28:12,648 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-12 16:28:12,648 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-12 16:28:12,648 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-12 16:28:12,656 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 04:28:12" (1/1) ... [2024-11-12 16:28:12,657 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 04:28:12" (1/1) ... [2024-11-12 16:28:12,660 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 04:28:12" (1/1) ... [2024-11-12 16:28:12,675 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]. [2024-11-12 16:28:12,675 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 04:28:12" (1/1) ... [2024-11-12 16:28:12,675 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 04:28:12" (1/1) ... [2024-11-12 16:28:12,683 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 04:28:12" (1/1) ... [2024-11-12 16:28:12,686 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 04:28:12" (1/1) ... [2024-11-12 16:28:12,688 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 04:28:12" (1/1) ... [2024-11-12 16:28:12,689 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 04:28:12" (1/1) ... [2024-11-12 16:28:12,691 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-12 16:28:12,692 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-12 16:28:12,692 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-12 16:28:12,692 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-12 16:28:12,693 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 04:28:12" (1/1) ... [2024-11-12 16:28:12,697 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-12 16:28:12,707 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-12 16:28:12,720 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) [2024-11-12 16:28:12,723 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 [2024-11-12 16:28:12,763 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-12 16:28:12,763 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2024-11-12 16:28:12,763 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2024-11-12 16:28:12,763 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2024-11-12 16:28:12,763 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2024-11-12 16:28:12,763 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2024-11-12 16:28:12,763 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2024-11-12 16:28:12,763 INFO L130 BoogieDeclarations]: Found specification of procedure thread4 [2024-11-12 16:28:12,763 INFO L138 BoogieDeclarations]: Found implementation of procedure thread4 [2024-11-12 16:28:12,764 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-12 16:28:12,764 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-11-12 16:28:12,764 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-11-12 16:28:12,764 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-11-12 16:28:12,764 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-11-12 16:28:12,764 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-12 16:28:12,765 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-12 16:28:12,765 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-11-12 16:28:12,765 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-11-12 16:28:12,766 WARN L207 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2024-11-12 16:28:12,855 INFO L238 CfgBuilder]: Building ICFG [2024-11-12 16:28:12,857 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-12 16:28:13,102 INFO L283 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-11-12 16:28:13,102 INFO L287 CfgBuilder]: Performing block encoding [2024-11-12 16:28:13,271 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-12 16:28:13,271 INFO L316 CfgBuilder]: Removed 4 assume(true) statements. [2024-11-12 16:28:13,272 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 04:28:13 BoogieIcfgContainer [2024-11-12 16:28:13,273 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-12 16:28:13,274 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-12 16:28:13,275 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-12 16:28:13,277 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-12 16:28:13,278 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.11 04:28:12" (1/3) ... [2024-11-12 16:28:13,279 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@20a22ef3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 04:28:13, skipping insertion in model container [2024-11-12 16:28:13,279 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 04:28:12" (2/3) ... [2024-11-12 16:28:13,279 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@20a22ef3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 04:28:13, skipping insertion in model container [2024-11-12 16:28:13,279 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 04:28:13" (3/3) ... [2024-11-12 16:28:13,280 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-min-max-dec.wvr.c [2024-11-12 16:28:13,292 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-12 16:28:13,292 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 18 error locations. [2024-11-12 16:28:13,292 INFO L489 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-11-12 16:28:13,353 INFO L143 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2024-11-12 16:28:13,379 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 88 places, 81 transitions, 190 flow [2024-11-12 16:28:13,404 INFO L124 PetriNetUnfolderBase]: 6/77 cut-off events. [2024-11-12 16:28:13,405 INFO L125 PetriNetUnfolderBase]: For 4/4 co-relation queries the response was YES. [2024-11-12 16:28:13,408 INFO L83 FinitePrefix]: Finished finitePrefix Result has 94 conditions, 77 events. 6/77 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 221 event pairs, 0 based on Foata normal form. 0/53 useless extension candidates. Maximal degree in co-relation 69. Up to 2 conditions per place. [2024-11-12 16:28:13,409 INFO L82 GeneralOperation]: Start removeDead. Operand has 88 places, 81 transitions, 190 flow [2024-11-12 16:28:13,411 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 83 places, 76 transitions, 176 flow [2024-11-12 16:28:13,417 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-12 16:28:13,421 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;@18ac7543, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-12 16:28:13,422 INFO L334 AbstractCegarLoop]: Starting to check reachability of 36 error locations. [2024-11-12 16:28:13,424 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-11-12 16:28:13,425 INFO L124 PetriNetUnfolderBase]: 1/6 cut-off events. [2024-11-12 16:28:13,425 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-11-12 16:28:13,425 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-12 16:28:13,425 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2024-11-12 16:28:13,426 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 33 more)] === [2024-11-12 16:28:13,431 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 16:28:13,431 INFO L85 PathProgramCache]: Analyzing trace with hash 496606758, now seen corresponding path program 1 times [2024-11-12 16:28:13,439 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 16:28:13,440 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [698008210] [2024-11-12 16:28:13,440 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 16:28:13,440 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 16:28:13,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 16:28:13,720 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-12 16:28:13,721 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 16:28:13,721 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [698008210] [2024-11-12 16:28:13,722 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [698008210] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-12 16:28:13,722 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-12 16:28:13,722 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-12 16:28:13,723 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [505176743] [2024-11-12 16:28:13,724 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-12 16:28:13,730 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-12 16:28:13,734 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 16:28:13,753 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-12 16:28:13,754 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-12 16:28:13,762 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 28 out of 81 [2024-11-12 16:28:13,764 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 83 places, 76 transitions, 176 flow. Second operand has 3 states, 3 states have (on average 29.333333333333332) internal successors, (88), 3 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-12 16:28:13,765 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-12 16:28:13,765 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 28 of 81 [2024-11-12 16:28:13,765 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-12 16:28:16,834 INFO L124 PetriNetUnfolderBase]: 32532/45884 cut-off events. [2024-11-12 16:28:16,835 INFO L125 PetriNetUnfolderBase]: For 1812/1812 co-relation queries the response was YES. [2024-11-12 16:28:16,922 INFO L83 FinitePrefix]: Finished finitePrefix Result has 88242 conditions, 45884 events. 32532/45884 cut-off events. For 1812/1812 co-relation queries the response was YES. Maximal size of possible extension queue 2754. Compared 341359 event pairs, 23751 based on Foata normal form. 1/30795 useless extension candidates. Maximal degree in co-relation 85331. Up to 39794 conditions per place. [2024-11-12 16:28:17,119 INFO L140 encePairwiseOnDemand]: 75/81 looper letters, 46 selfloop transitions, 2 changer transitions 0/71 dead transitions. [2024-11-12 16:28:17,119 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 80 places, 71 transitions, 262 flow [2024-11-12 16:28:17,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-12 16:28:17,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-12 16:28:17,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 136 transitions. [2024-11-12 16:28:17,130 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5596707818930041 [2024-11-12 16:28:17,131 INFO L175 Difference]: Start difference. First operand has 83 places, 76 transitions, 176 flow. Second operand 3 states and 136 transitions. [2024-11-12 16:28:17,132 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 80 places, 71 transitions, 262 flow [2024-11-12 16:28:17,163 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 71 transitions, 246 flow, removed 0 selfloop flow, removed 8 redundant places. [2024-11-12 16:28:17,166 INFO L231 Difference]: Finished difference. Result has 72 places, 71 transitions, 154 flow [2024-11-12 16:28:17,168 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=81, PETRI_DIFFERENCE_MINUEND_FLOW=150, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=71, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=154, PETRI_PLACES=72, PETRI_TRANSITIONS=71} [2024-11-12 16:28:17,172 INFO L279 CegarLoopForPetriNet]: 83 programPoint places, -11 predicate places. [2024-11-12 16:28:17,172 INFO L471 AbstractCegarLoop]: Abstraction has has 72 places, 71 transitions, 154 flow [2024-11-12 16:28:17,172 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 29.333333333333332) internal successors, (88), 3 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-12 16:28:17,173 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-12 16:28:17,173 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2024-11-12 16:28:17,173 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-12 16:28:17,173 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 33 more)] === [2024-11-12 16:28:17,174 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 16:28:17,174 INFO L85 PathProgramCache]: Analyzing trace with hash 496606759, now seen corresponding path program 1 times [2024-11-12 16:28:17,174 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 16:28:17,174 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [480621271] [2024-11-12 16:28:17,174 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 16:28:17,175 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 16:28:17,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 16:28:17,420 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-12 16:28:17,420 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 16:28:17,420 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [480621271] [2024-11-12 16:28:17,420 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [480621271] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-12 16:28:17,420 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-12 16:28:17,420 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-12 16:28:17,420 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [35108828] [2024-11-12 16:28:17,421 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-12 16:28:17,421 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-12 16:28:17,422 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 16:28:17,422 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-12 16:28:17,422 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-11-12 16:28:17,447 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 27 out of 81 [2024-11-12 16:28:17,447 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 71 transitions, 154 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) [2024-11-12 16:28:17,447 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-12 16:28:17,447 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 27 of 81 [2024-11-12 16:28:17,448 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-12 16:28:19,660 INFO L124 PetriNetUnfolderBase]: 32532/45886 cut-off events. [2024-11-12 16:28:19,661 INFO L125 PetriNetUnfolderBase]: For 252/252 co-relation queries the response was YES. [2024-11-12 16:28:19,709 INFO L83 FinitePrefix]: Finished finitePrefix Result has 86802 conditions, 45886 events. 32532/45886 cut-off events. For 252/252 co-relation queries the response was YES. Maximal size of possible extension queue 2754. Compared 341112 event pairs, 23751 based on Foata normal form. 1/30797 useless extension candidates. Maximal degree in co-relation 86779. Up to 39796 conditions per place. [2024-11-12 16:28:19,849 INFO L140 encePairwiseOnDemand]: 76/81 looper letters, 49 selfloop transitions, 3 changer transitions 0/73 dead transitions. [2024-11-12 16:28:19,849 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 73 transitions, 262 flow [2024-11-12 16:28:19,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-12 16:28:19,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-12 16:28:19,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 189 transitions. [2024-11-12 16:28:19,851 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4666666666666667 [2024-11-12 16:28:19,851 INFO L175 Difference]: Start difference. First operand has 72 places, 71 transitions, 154 flow. Second operand 5 states and 189 transitions. [2024-11-12 16:28:19,851 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 73 transitions, 262 flow [2024-11-12 16:28:19,852 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 73 transitions, 258 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-12 16:28:19,853 INFO L231 Difference]: Finished difference. Result has 75 places, 72 transitions, 166 flow [2024-11-12 16:28:19,853 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=81, PETRI_DIFFERENCE_MINUEND_FLOW=150, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=71, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=166, PETRI_PLACES=75, PETRI_TRANSITIONS=72} [2024-11-12 16:28:19,854 INFO L279 CegarLoopForPetriNet]: 83 programPoint places, -8 predicate places. [2024-11-12 16:28:19,854 INFO L471 AbstractCegarLoop]: Abstraction has has 75 places, 72 transitions, 166 flow [2024-11-12 16:28:19,854 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) [2024-11-12 16:28:19,854 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-12 16:28:19,855 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1] [2024-11-12 16:28:19,855 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-12 16:28:19,855 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 33 more)] === [2024-11-12 16:28:19,855 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 16:28:19,855 INFO L85 PathProgramCache]: Analyzing trace with hash 497742279, now seen corresponding path program 1 times [2024-11-12 16:28:19,859 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 16:28:19,859 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1225467947] [2024-11-12 16:28:19,859 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 16:28:19,859 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 16:28:19,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 16:28:20,069 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-12 16:28:20,069 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 16:28:20,069 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1225467947] [2024-11-12 16:28:20,070 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1225467947] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-12 16:28:20,070 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [286738233] [2024-11-12 16:28:20,070 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 16:28:20,070 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-12 16:28:20,070 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-12 16:28:20,072 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) [2024-11-12 16:28:20,074 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-12 16:28:20,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 16:28:20,129 INFO L256 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 15 conjuncts are in the unsatisfiable core [2024-11-12 16:28:20,132 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-12 16:28:20,184 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 [2024-11-12 16:28:20,291 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-12 16:28:20,291 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-12 16:28:20,438 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-12 16:28:20,439 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [286738233] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-12 16:28:20,439 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-12 16:28:20,439 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 13 [2024-11-12 16:28:20,439 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1790331225] [2024-11-12 16:28:20,439 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-12 16:28:20,439 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-11-12 16:28:20,440 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 16:28:20,441 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-11-12 16:28:20,442 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2024-11-12 16:28:20,537 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 27 out of 81 [2024-11-12 16:28:20,538 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 72 transitions, 166 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) [2024-11-12 16:28:20,538 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-12 16:28:20,538 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 27 of 81 [2024-11-12 16:28:20,538 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-12 16:28:23,080 INFO L124 PetriNetUnfolderBase]: 32533/45888 cut-off events. [2024-11-12 16:28:23,081 INFO L125 PetriNetUnfolderBase]: For 253/253 co-relation queries the response was YES. [2024-11-12 16:28:23,141 INFO L83 FinitePrefix]: Finished finitePrefix Result has 86813 conditions, 45888 events. 32533/45888 cut-off events. For 253/253 co-relation queries the response was YES. Maximal size of possible extension queue 2754. Compared 341140 event pairs, 23751 based on Foata normal form. 0/30799 useless extension candidates. Maximal degree in co-relation 86795. Up to 39793 conditions per place. [2024-11-12 16:28:23,435 INFO L140 encePairwiseOnDemand]: 75/81 looper letters, 45 selfloop transitions, 9 changer transitions 0/75 dead transitions. [2024-11-12 16:28:23,435 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 75 transitions, 282 flow [2024-11-12 16:28:23,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-12 16:28:23,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-11-12 16:28:23,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 299 transitions. [2024-11-12 16:28:23,439 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4101508916323731 [2024-11-12 16:28:23,440 INFO L175 Difference]: Start difference. First operand has 75 places, 72 transitions, 166 flow. Second operand 9 states and 299 transitions. [2024-11-12 16:28:23,440 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 75 transitions, 282 flow [2024-11-12 16:28:23,441 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 75 transitions, 279 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-12 16:28:23,442 INFO L231 Difference]: Finished difference. Result has 80 places, 75 transitions, 191 flow [2024-11-12 16:28:23,442 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=81, PETRI_DIFFERENCE_MINUEND_FLOW=159, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=71, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=65, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=191, PETRI_PLACES=80, PETRI_TRANSITIONS=75} [2024-11-12 16:28:23,443 INFO L279 CegarLoopForPetriNet]: 83 programPoint places, -3 predicate places. [2024-11-12 16:28:23,443 INFO L471 AbstractCegarLoop]: Abstraction has has 80 places, 75 transitions, 191 flow [2024-11-12 16:28:23,443 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) [2024-11-12 16:28:23,444 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-12 16:28:23,444 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-12 16:28:23,457 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-11-12 16:28:23,647 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 [2024-11-12 16:28:23,648 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 33 more)] === [2024-11-12 16:28:23,648 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 16:28:23,648 INFO L85 PathProgramCache]: Analyzing trace with hash 1589070633, now seen corresponding path program 1 times [2024-11-12 16:28:23,648 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 16:28:23,650 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1576345266] [2024-11-12 16:28:23,651 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 16:28:23,651 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 16:28:23,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 16:28:23,696 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-12 16:28:23,696 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 16:28:23,696 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1576345266] [2024-11-12 16:28:23,696 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1576345266] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-12 16:28:23,696 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-12 16:28:23,697 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-12 16:28:23,697 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [198028449] [2024-11-12 16:28:23,697 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-12 16:28:23,697 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-12 16:28:23,697 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 16:28:23,697 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-12 16:28:23,698 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-12 16:28:23,703 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 28 out of 81 [2024-11-12 16:28:23,704 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 80 places, 75 transitions, 191 flow. Second operand has 4 states, 4 states have (on average 29.75) internal successors, (119), 4 states have internal predecessors, (119), 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) [2024-11-12 16:28:23,704 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-12 16:28:23,704 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 28 of 81 [2024-11-12 16:28:23,704 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-12 16:28:24,977 INFO L124 PetriNetUnfolderBase]: 16596/24017 cut-off events. [2024-11-12 16:28:24,977 INFO L125 PetriNetUnfolderBase]: For 165/165 co-relation queries the response was YES. [2024-11-12 16:28:25,000 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44851 conditions, 24017 events. 16596/24017 cut-off events. For 165/165 co-relation queries the response was YES. Maximal size of possible extension queue 1423. Compared 170570 event pairs, 11993 based on Foata normal form. 0/18586 useless extension candidates. Maximal degree in co-relation 44831. Up to 20220 conditions per place. [2024-11-12 16:28:25,061 INFO L140 encePairwiseOnDemand]: 73/81 looper letters, 44 selfloop transitions, 3 changer transitions 0/69 dead transitions. [2024-11-12 16:28:25,061 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 77 places, 69 transitions, 273 flow [2024-11-12 16:28:25,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-12 16:28:25,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-12 16:28:25,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 160 transitions. [2024-11-12 16:28:25,063 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.49382716049382713 [2024-11-12 16:28:25,063 INFO L175 Difference]: Start difference. First operand has 80 places, 75 transitions, 191 flow. Second operand 4 states and 160 transitions. [2024-11-12 16:28:25,063 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 77 places, 69 transitions, 273 flow [2024-11-12 16:28:25,063 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 69 transitions, 258 flow, removed 4 selfloop flow, removed 4 redundant places. [2024-11-12 16:28:25,064 INFO L231 Difference]: Finished difference. Result has 73 places, 69 transitions, 170 flow [2024-11-12 16:28:25,064 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=81, PETRI_DIFFERENCE_MINUEND_FLOW=164, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=170, PETRI_PLACES=73, PETRI_TRANSITIONS=69} [2024-11-12 16:28:25,065 INFO L279 CegarLoopForPetriNet]: 83 programPoint places, -10 predicate places. [2024-11-12 16:28:25,065 INFO L471 AbstractCegarLoop]: Abstraction has has 73 places, 69 transitions, 170 flow [2024-11-12 16:28:25,065 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 29.75) internal successors, (119), 4 states have internal predecessors, (119), 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) [2024-11-12 16:28:25,065 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-12 16:28:25,066 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-12 16:28:25,066 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-11-12 16:28:25,066 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 33 more)] === [2024-11-12 16:28:25,066 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 16:28:25,066 INFO L85 PathProgramCache]: Analyzing trace with hash 1589070634, now seen corresponding path program 1 times [2024-11-12 16:28:25,066 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 16:28:25,066 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1169631727] [2024-11-12 16:28:25,067 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 16:28:25,067 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 16:28:25,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 16:28:25,177 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-12 16:28:25,177 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 16:28:25,177 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1169631727] [2024-11-12 16:28:25,177 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1169631727] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-12 16:28:25,178 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [35505916] [2024-11-12 16:28:25,178 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 16:28:25,178 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-12 16:28:25,178 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-12 16:28:25,180 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) [2024-11-12 16:28:25,183 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-12 16:28:25,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 16:28:25,236 INFO L256 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-11-12 16:28:25,237 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-12 16:28:25,280 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-12 16:28:25,281 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-12 16:28:25,305 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 [2024-11-12 16:28:25,322 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-12 16:28:25,322 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [35505916] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-12 16:28:25,323 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-12 16:28:25,323 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2024-11-12 16:28:25,323 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [960991280] [2024-11-12 16:28:25,323 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-12 16:28:25,323 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-11-12 16:28:25,323 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 16:28:25,323 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-11-12 16:28:25,324 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-11-12 16:28:25,344 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 29 out of 81 [2024-11-12 16:28:25,345 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 69 transitions, 170 flow. Second operand has 8 states, 8 states have (on average 30.625) internal successors, (245), 8 states have internal predecessors, (245), 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) [2024-11-12 16:28:25,345 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-12 16:28:25,345 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 29 of 81 [2024-11-12 16:28:25,345 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-12 16:28:26,161 INFO L124 PetriNetUnfolderBase]: 13094/19015 cut-off events. [2024-11-12 16:28:26,162 INFO L125 PetriNetUnfolderBase]: For 144/144 co-relation queries the response was YES. [2024-11-12 16:28:26,185 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35307 conditions, 19015 events. 13094/19015 cut-off events. For 144/144 co-relation queries the response was YES. Maximal size of possible extension queue 1206. Compared 132205 event pairs, 9124 based on Foata normal form. 0/15340 useless extension candidates. Maximal degree in co-relation 35290. Up to 15819 conditions per place. [2024-11-12 16:28:26,237 INFO L140 encePairwiseOnDemand]: 76/81 looper letters, 41 selfloop transitions, 4 changer transitions 0/67 dead transitions. [2024-11-12 16:28:26,237 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 67 transitions, 256 flow [2024-11-12 16:28:26,237 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-12 16:28:26,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-12 16:28:26,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 189 transitions. [2024-11-12 16:28:26,238 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4666666666666667 [2024-11-12 16:28:26,238 INFO L175 Difference]: Start difference. First operand has 73 places, 69 transitions, 170 flow. Second operand 5 states and 189 transitions. [2024-11-12 16:28:26,238 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 67 transitions, 256 flow [2024-11-12 16:28:26,239 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 67 transitions, 252 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-12 16:28:26,240 INFO L231 Difference]: Finished difference. Result has 73 places, 67 transitions, 170 flow [2024-11-12 16:28:26,240 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=81, PETRI_DIFFERENCE_MINUEND_FLOW=162, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=67, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=170, PETRI_PLACES=73, PETRI_TRANSITIONS=67} [2024-11-12 16:28:26,240 INFO L279 CegarLoopForPetriNet]: 83 programPoint places, -10 predicate places. [2024-11-12 16:28:26,240 INFO L471 AbstractCegarLoop]: Abstraction has has 73 places, 67 transitions, 170 flow [2024-11-12 16:28:26,241 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 30.625) internal successors, (245), 8 states have internal predecessors, (245), 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) [2024-11-12 16:28:26,241 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-12 16:28:26,241 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-12 16:28:26,253 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-11-12 16:28:26,441 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 [2024-11-12 16:28:26,441 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 33 more)] === [2024-11-12 16:28:26,442 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 16:28:26,442 INFO L85 PathProgramCache]: Analyzing trace with hash -1026431102, now seen corresponding path program 1 times [2024-11-12 16:28:26,442 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 16:28:26,442 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1987479961] [2024-11-12 16:28:26,442 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 16:28:26,442 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 16:28:26,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 16:28:26,608 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-12 16:28:26,608 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 16:28:26,608 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1987479961] [2024-11-12 16:28:26,608 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1987479961] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-12 16:28:26,608 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1807292176] [2024-11-12 16:28:26,608 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 16:28:26,608 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-12 16:28:26,609 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-12 16:28:26,610 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) [2024-11-12 16:28:26,611 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-12 16:28:26,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 16:28:26,665 INFO L256 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-11-12 16:28:26,666 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-12 16:28:26,727 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-12 16:28:26,727 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-12 16:28:26,766 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 [2024-11-12 16:28:26,773 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-12 16:28:26,773 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1807292176] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-12 16:28:26,773 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-12 16:28:26,773 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2024-11-12 16:28:26,773 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [602899711] [2024-11-12 16:28:26,773 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-12 16:28:26,774 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-11-12 16:28:26,774 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 16:28:26,774 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-11-12 16:28:26,774 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2024-11-12 16:28:26,803 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 29 out of 81 [2024-11-12 16:28:26,803 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 67 transitions, 170 flow. Second operand has 11 states, 11 states have (on average 31.272727272727273) internal successors, (344), 11 states have internal predecessors, (344), 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) [2024-11-12 16:28:26,804 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-12 16:28:26,804 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 29 of 81 [2024-11-12 16:28:26,804 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-12 16:28:28,047 INFO L124 PetriNetUnfolderBase]: 18150/25635 cut-off events. [2024-11-12 16:28:28,047 INFO L125 PetriNetUnfolderBase]: For 227/227 co-relation queries the response was YES. [2024-11-12 16:28:28,078 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48289 conditions, 25635 events. 18150/25635 cut-off events. For 227/227 co-relation queries the response was YES. Maximal size of possible extension queue 1450. Compared 173150 event pairs, 4988 based on Foata normal form. 0/21708 useless extension candidates. Maximal degree in co-relation 48271. Up to 8507 conditions per place. [2024-11-12 16:28:28,147 INFO L140 encePairwiseOnDemand]: 72/81 looper letters, 78 selfloop transitions, 9 changer transitions 0/109 dead transitions. [2024-11-12 16:28:28,147 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 109 transitions, 434 flow [2024-11-12 16:28:28,148 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-12 16:28:28,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-11-12 16:28:28,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 290 transitions. [2024-11-12 16:28:28,148 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5114638447971781 [2024-11-12 16:28:28,148 INFO L175 Difference]: Start difference. First operand has 73 places, 67 transitions, 170 flow. Second operand 7 states and 290 transitions. [2024-11-12 16:28:28,149 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 109 transitions, 434 flow [2024-11-12 16:28:28,149 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 109 transitions, 428 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-11-12 16:28:28,150 INFO L231 Difference]: Finished difference. Result has 77 places, 69 transitions, 202 flow [2024-11-12 16:28:28,150 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=81, PETRI_DIFFERENCE_MINUEND_FLOW=162, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=66, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=202, PETRI_PLACES=77, PETRI_TRANSITIONS=69} [2024-11-12 16:28:28,151 INFO L279 CegarLoopForPetriNet]: 83 programPoint places, -6 predicate places. [2024-11-12 16:28:28,151 INFO L471 AbstractCegarLoop]: Abstraction has has 77 places, 69 transitions, 202 flow [2024-11-12 16:28:28,151 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 31.272727272727273) internal successors, (344), 11 states have internal predecessors, (344), 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) [2024-11-12 16:28:28,151 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-12 16:28:28,151 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-12 16:28:28,164 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2024-11-12 16:28:28,352 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 [2024-11-12 16:28:28,352 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 33 more)] === [2024-11-12 16:28:28,353 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 16:28:28,353 INFO L85 PathProgramCache]: Analyzing trace with hash 1203647856, now seen corresponding path program 1 times [2024-11-12 16:28:28,353 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 16:28:28,353 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [203102307] [2024-11-12 16:28:28,353 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 16:28:28,353 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 16:28:28,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 16:28:28,474 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-12 16:28:28,474 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 16:28:28,474 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [203102307] [2024-11-12 16:28:28,474 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [203102307] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-12 16:28:28,474 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1010011471] [2024-11-12 16:28:28,475 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 16:28:28,475 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-12 16:28:28,475 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-12 16:28:28,476 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) [2024-11-12 16:28:28,477 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-12 16:28:28,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 16:28:28,529 INFO L256 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 5 conjuncts are in the unsatisfiable core [2024-11-12 16:28:28,530 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-12 16:28:28,565 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-12 16:28:28,566 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-12 16:28:28,566 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1010011471] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-12 16:28:28,566 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-12 16:28:28,566 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 7 [2024-11-12 16:28:28,566 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1185167891] [2024-11-12 16:28:28,566 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-12 16:28:28,567 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-12 16:28:28,567 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 16:28:28,567 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-12 16:28:28,567 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-11-12 16:28:28,573 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 28 out of 81 [2024-11-12 16:28:28,573 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 77 places, 69 transitions, 202 flow. Second operand has 4 states, 4 states have (on average 30.25) internal successors, (121), 4 states have internal predecessors, (121), 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) [2024-11-12 16:28:28,573 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-12 16:28:28,573 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 28 of 81 [2024-11-12 16:28:28,573 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-12 16:28:30,679 INFO L124 PetriNetUnfolderBase]: 22097/35426 cut-off events. [2024-11-12 16:28:30,680 INFO L125 PetriNetUnfolderBase]: For 8698/8698 co-relation queries the response was YES. [2024-11-12 16:28:30,737 INFO L83 FinitePrefix]: Finished finitePrefix Result has 69190 conditions, 35426 events. 22097/35426 cut-off events. For 8698/8698 co-relation queries the response was YES. Maximal size of possible extension queue 1245. Compared 275758 event pairs, 2687 based on Foata normal form. 0/31595 useless extension candidates. Maximal degree in co-relation 69170. Up to 17941 conditions per place. [2024-11-12 16:28:30,833 INFO L140 encePairwiseOnDemand]: 75/81 looper letters, 93 selfloop transitions, 5 changer transitions 0/119 dead transitions. [2024-11-12 16:28:30,833 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 80 places, 119 transitions, 552 flow [2024-11-12 16:28:30,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-12 16:28:30,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-12 16:28:30,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 197 transitions. [2024-11-12 16:28:30,834 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6080246913580247 [2024-11-12 16:28:30,834 INFO L175 Difference]: Start difference. First operand has 77 places, 69 transitions, 202 flow. Second operand 4 states and 197 transitions. [2024-11-12 16:28:30,835 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 80 places, 119 transitions, 552 flow [2024-11-12 16:28:30,838 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 119 transitions, 546 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-11-12 16:28:30,840 INFO L231 Difference]: Finished difference. Result has 79 places, 73 transitions, 229 flow [2024-11-12 16:28:30,840 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=81, PETRI_DIFFERENCE_MINUEND_FLOW=196, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=229, PETRI_PLACES=79, PETRI_TRANSITIONS=73} [2024-11-12 16:28:30,840 INFO L279 CegarLoopForPetriNet]: 83 programPoint places, -4 predicate places. [2024-11-12 16:28:30,840 INFO L471 AbstractCegarLoop]: Abstraction has has 79 places, 73 transitions, 229 flow [2024-11-12 16:28:30,841 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 30.25) internal successors, (121), 4 states have internal predecessors, (121), 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) [2024-11-12 16:28:30,841 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-12 16:28:30,841 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-12 16:28:30,854 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-11-12 16:28:31,045 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 [2024-11-12 16:28:31,046 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 33 more)] === [2024-11-12 16:28:31,046 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 16:28:31,046 INFO L85 PathProgramCache]: Analyzing trace with hash -1139311222, now seen corresponding path program 1 times [2024-11-12 16:28:31,046 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 16:28:31,046 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1108157174] [2024-11-12 16:28:31,046 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 16:28:31,046 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 16:28:31,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 16:28:31,152 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-12 16:28:31,152 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 16:28:31,153 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1108157174] [2024-11-12 16:28:31,153 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1108157174] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-12 16:28:31,153 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1063364753] [2024-11-12 16:28:31,153 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 16:28:31,153 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-12 16:28:31,153 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-12 16:28:31,155 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) [2024-11-12 16:28:31,156 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-12 16:28:31,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 16:28:31,215 INFO L256 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 5 conjuncts are in the unsatisfiable core [2024-11-12 16:28:31,215 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-12 16:28:31,252 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-12 16:28:31,252 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-12 16:28:31,253 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1063364753] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-12 16:28:31,253 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-12 16:28:31,253 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 7 [2024-11-12 16:28:31,253 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1025639891] [2024-11-12 16:28:31,253 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-12 16:28:31,253 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-12 16:28:31,253 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 16:28:31,253 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-12 16:28:31,253 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-11-12 16:28:31,259 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 28 out of 81 [2024-11-12 16:28:31,259 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 73 transitions, 229 flow. Second operand has 4 states, 4 states have (on average 30.75) internal successors, (123), 4 states have internal predecessors, (123), 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) [2024-11-12 16:28:31,259 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-12 16:28:31,259 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 28 of 81 [2024-11-12 16:28:31,260 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-12 16:28:33,765 INFO L124 PetriNetUnfolderBase]: 31336/48676 cut-off events. [2024-11-12 16:28:33,765 INFO L125 PetriNetUnfolderBase]: For 17743/19183 co-relation queries the response was YES. [2024-11-12 16:28:33,879 INFO L83 FinitePrefix]: Finished finitePrefix Result has 104217 conditions, 48676 events. 31336/48676 cut-off events. For 17743/19183 co-relation queries the response was YES. Maximal size of possible extension queue 1577. Compared 376782 event pairs, 4070 based on Foata normal form. 1440/46107 useless extension candidates. Maximal degree in co-relation 104198. Up to 26029 conditions per place. [2024-11-12 16:28:34,021 INFO L140 encePairwiseOnDemand]: 75/81 looper letters, 96 selfloop transitions, 5 changer transitions 0/122 dead transitions. [2024-11-12 16:28:34,021 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 122 transitions, 597 flow [2024-11-12 16:28:34,021 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-12 16:28:34,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-12 16:28:34,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 196 transitions. [2024-11-12 16:28:34,022 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6049382716049383 [2024-11-12 16:28:34,022 INFO L175 Difference]: Start difference. First operand has 79 places, 73 transitions, 229 flow. Second operand 4 states and 196 transitions. [2024-11-12 16:28:34,022 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 122 transitions, 597 flow [2024-11-12 16:28:34,029 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 81 places, 122 transitions, 590 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-12 16:28:34,030 INFO L231 Difference]: Finished difference. Result has 82 places, 75 transitions, 247 flow [2024-11-12 16:28:34,030 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=81, PETRI_DIFFERENCE_MINUEND_FLOW=224, PETRI_DIFFERENCE_MINUEND_PLACES=78, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=73, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=247, PETRI_PLACES=82, PETRI_TRANSITIONS=75} [2024-11-12 16:28:34,031 INFO L279 CegarLoopForPetriNet]: 83 programPoint places, -1 predicate places. [2024-11-12 16:28:34,031 INFO L471 AbstractCegarLoop]: Abstraction has has 82 places, 75 transitions, 247 flow [2024-11-12 16:28:34,031 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 30.75) internal successors, (123), 4 states have internal predecessors, (123), 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) [2024-11-12 16:28:34,031 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-12 16:28:34,031 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-12 16:28:34,044 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2024-11-12 16:28:34,232 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 [2024-11-12 16:28:34,232 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 33 more)] === [2024-11-12 16:28:34,233 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 16:28:34,233 INFO L85 PathProgramCache]: Analyzing trace with hash -2018230301, now seen corresponding path program 1 times [2024-11-12 16:28:34,233 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 16:28:34,233 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1464616444] [2024-11-12 16:28:34,233 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 16:28:34,233 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 16:28:34,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 16:28:34,302 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-12 16:28:34,303 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 16:28:34,303 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1464616444] [2024-11-12 16:28:34,303 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1464616444] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-12 16:28:34,303 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1554108227] [2024-11-12 16:28:34,303 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 16:28:34,303 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-12 16:28:34,303 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-12 16:28:34,305 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) [2024-11-12 16:28:34,306 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-12 16:28:34,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 16:28:34,361 INFO L256 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-12 16:28:34,362 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-12 16:28:34,413 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-12 16:28:34,414 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-12 16:28:34,459 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-12 16:28:34,459 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1554108227] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-12 16:28:34,459 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-12 16:28:34,459 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 14 [2024-11-12 16:28:34,459 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [319982141] [2024-11-12 16:28:34,460 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-12 16:28:34,460 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-11-12 16:28:34,460 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 16:28:34,460 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-11-12 16:28:34,460 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=126, Unknown=0, NotChecked=0, Total=182 [2024-11-12 16:28:34,509 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 27 out of 81 [2024-11-12 16:28:34,510 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 82 places, 75 transitions, 247 flow. Second operand has 14 states, 14 states have (on average 29.857142857142858) internal successors, (418), 14 states have internal predecessors, (418), 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) [2024-11-12 16:28:34,510 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-12 16:28:34,510 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 27 of 81 [2024-11-12 16:28:34,510 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-12 16:28:39,227 INFO L124 PetriNetUnfolderBase]: 50882/71306 cut-off events. [2024-11-12 16:28:39,227 INFO L125 PetriNetUnfolderBase]: For 29736/35855 co-relation queries the response was YES. [2024-11-12 16:28:39,405 INFO L83 FinitePrefix]: Finished finitePrefix Result has 172623 conditions, 71306 events. 50882/71306 cut-off events. For 29736/35855 co-relation queries the response was YES. Maximal size of possible extension queue 2837. Compared 520226 event pairs, 27591 based on Foata normal form. 6797/75717 useless extension candidates. Maximal degree in co-relation 172601. Up to 39302 conditions per place. [2024-11-12 16:28:39,637 INFO L140 encePairwiseOnDemand]: 71/81 looper letters, 134 selfloop transitions, 12 changer transitions 0/166 dead transitions. [2024-11-12 16:28:39,637 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 89 places, 166 transitions, 853 flow [2024-11-12 16:28:39,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-12 16:28:39,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-11-12 16:28:39,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 336 transitions. [2024-11-12 16:28:39,639 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5185185185185185 [2024-11-12 16:28:39,639 INFO L175 Difference]: Start difference. First operand has 82 places, 75 transitions, 247 flow. Second operand 8 states and 336 transitions. [2024-11-12 16:28:39,639 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 89 places, 166 transitions, 853 flow [2024-11-12 16:28:39,663 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 87 places, 166 transitions, 828 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-12 16:28:39,664 INFO L231 Difference]: Finished difference. Result has 90 places, 79 transitions, 307 flow [2024-11-12 16:28:39,664 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=81, PETRI_DIFFERENCE_MINUEND_FLOW=240, PETRI_DIFFERENCE_MINUEND_PLACES=80, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=75, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=307, PETRI_PLACES=90, PETRI_TRANSITIONS=79} [2024-11-12 16:28:39,665 INFO L279 CegarLoopForPetriNet]: 83 programPoint places, 7 predicate places. [2024-11-12 16:28:39,665 INFO L471 AbstractCegarLoop]: Abstraction has has 90 places, 79 transitions, 307 flow [2024-11-12 16:28:39,665 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 29.857142857142858) internal successors, (418), 14 states have internal predecessors, (418), 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) [2024-11-12 16:28:39,665 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-12 16:28:39,665 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-12 16:28:39,678 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-11-12 16:28:39,866 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-12 16:28:39,866 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 33 more)] === [2024-11-12 16:28:39,866 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 16:28:39,867 INFO L85 PathProgramCache]: Analyzing trace with hash 803850553, now seen corresponding path program 1 times [2024-11-12 16:28:39,867 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 16:28:39,867 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1453575328] [2024-11-12 16:28:39,867 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 16:28:39,867 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 16:28:39,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 16:28:39,942 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-12 16:28:39,942 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 16:28:39,942 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1453575328] [2024-11-12 16:28:39,942 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1453575328] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-12 16:28:39,943 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1923450951] [2024-11-12 16:28:39,943 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 16:28:39,943 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-12 16:28:39,943 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-12 16:28:39,944 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-12 16:28:39,945 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-11-12 16:28:39,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 16:28:39,996 INFO L256 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-12 16:28:39,996 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-12 16:28:40,047 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-12 16:28:40,048 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-12 16:28:40,091 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-12 16:28:40,091 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1923450951] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-12 16:28:40,092 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-12 16:28:40,092 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 14 [2024-11-12 16:28:40,092 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1951034922] [2024-11-12 16:28:40,092 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-12 16:28:40,092 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-11-12 16:28:40,092 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 16:28:40,093 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-11-12 16:28:40,093 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=126, Unknown=0, NotChecked=0, Total=182 [2024-11-12 16:28:40,141 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 26 out of 81 [2024-11-12 16:28:40,142 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 90 places, 79 transitions, 307 flow. Second operand has 14 states, 14 states have (on average 28.428571428571427) internal successors, (398), 14 states have internal predecessors, (398), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-12 16:28:40,142 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-12 16:28:40,142 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 26 of 81 [2024-11-12 16:28:40,143 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-12 16:28:44,871 INFO L124 PetriNetUnfolderBase]: 50949/73683 cut-off events. [2024-11-12 16:28:44,871 INFO L125 PetriNetUnfolderBase]: For 58131/61739 co-relation queries the response was YES. [2024-11-12 16:28:45,070 INFO L83 FinitePrefix]: Finished finitePrefix Result has 180152 conditions, 73683 events. 50949/73683 cut-off events. For 58131/61739 co-relation queries the response was YES. Maximal size of possible extension queue 2373. Compared 540604 event pairs, 31419 based on Foata normal form. 3590/73948 useless extension candidates. Maximal degree in co-relation 180122. Up to 43909 conditions per place. [2024-11-12 16:28:45,305 INFO L140 encePairwiseOnDemand]: 71/81 looper letters, 132 selfloop transitions, 12 changer transitions 0/163 dead transitions. [2024-11-12 16:28:45,305 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 97 places, 163 transitions, 893 flow [2024-11-12 16:28:45,305 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-12 16:28:45,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-11-12 16:28:45,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 333 transitions. [2024-11-12 16:28:45,306 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5138888888888888 [2024-11-12 16:28:45,306 INFO L175 Difference]: Start difference. First operand has 90 places, 79 transitions, 307 flow. Second operand 8 states and 333 transitions. [2024-11-12 16:28:45,306 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 97 places, 163 transitions, 893 flow [2024-11-12 16:28:45,377 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 93 places, 163 transitions, 874 flow, removed 3 selfloop flow, removed 4 redundant places. [2024-11-12 16:28:45,379 INFO L231 Difference]: Finished difference. Result has 96 places, 83 transitions, 353 flow [2024-11-12 16:28:45,379 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=81, PETRI_DIFFERENCE_MINUEND_FLOW=292, PETRI_DIFFERENCE_MINUEND_PLACES=86, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=79, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=353, PETRI_PLACES=96, PETRI_TRANSITIONS=83} [2024-11-12 16:28:45,379 INFO L279 CegarLoopForPetriNet]: 83 programPoint places, 13 predicate places. [2024-11-12 16:28:45,379 INFO L471 AbstractCegarLoop]: Abstraction has has 96 places, 83 transitions, 353 flow [2024-11-12 16:28:45,380 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 28.428571428571427) internal successors, (398), 14 states have internal predecessors, (398), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-12 16:28:45,380 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-12 16:28:45,380 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-12 16:28:45,393 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2024-11-12 16:28:45,582 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-12 16:28:45,582 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 33 more)] === [2024-11-12 16:28:45,582 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 16:28:45,583 INFO L85 PathProgramCache]: Analyzing trace with hash -493175933, now seen corresponding path program 2 times [2024-11-12 16:28:45,583 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 16:28:45,583 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [656318238] [2024-11-12 16:28:45,583 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 16:28:45,583 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 16:28:45,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 16:28:45,753 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-12 16:28:45,753 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 16:28:45,754 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [656318238] [2024-11-12 16:28:45,754 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [656318238] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-12 16:28:45,754 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [430382522] [2024-11-12 16:28:45,754 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-12 16:28:45,754 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-12 16:28:45,754 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-12 16:28:45,755 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-12 16:28:45,756 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-11-12 16:28:45,814 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-12 16:28:45,815 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-12 16:28:45,815 INFO L256 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 17 conjuncts are in the unsatisfiable core [2024-11-12 16:28:45,816 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-12 16:28:45,931 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-12 16:28:45,931 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-12 16:28:46,014 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 24 treesize of output 20 [2024-11-12 16:28:46,052 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-12 16:28:46,053 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [430382522] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-12 16:28:46,053 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-12 16:28:46,053 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 19 [2024-11-12 16:28:46,053 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [526984606] [2024-11-12 16:28:46,053 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-12 16:28:46,053 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-11-12 16:28:46,054 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 16:28:46,055 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-11-12 16:28:46,055 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=309, Unknown=0, NotChecked=0, Total=380 [2024-11-12 16:28:46,147 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 29 out of 81 [2024-11-12 16:28:46,147 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 96 places, 83 transitions, 353 flow. Second operand has 20 states, 20 states have (on average 31.6) internal successors, (632), 20 states have internal predecessors, (632), 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) [2024-11-12 16:28:46,147 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-12 16:28:46,147 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 29 of 81 [2024-11-12 16:28:46,147 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand