./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 3289d67d 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-tmp.fs.icfgbuilder-eval-3289d67-m [2024-11-17 03:37:45,264 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-17 03:37:45,336 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2024-11-17 03:37:45,342 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-17 03:37:45,342 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-17 03:37:45,365 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-17 03:37:45,369 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-17 03:37:45,369 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-17 03:37:45,370 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-17 03:37:45,371 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-17 03:37:45,371 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-17 03:37:45,371 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-17 03:37:45,372 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-17 03:37:45,372 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-17 03:37:45,373 INFO L153 SettingsManager]: * Use SBE=true [2024-11-17 03:37:45,374 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-17 03:37:45,374 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-17 03:37:45,374 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-17 03:37:45,374 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-17 03:37:45,375 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-17 03:37:45,375 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2024-11-17 03:37:45,375 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2024-11-17 03:37:45,375 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2024-11-17 03:37:45,376 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-17 03:37:45,376 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-11-17 03:37:45,376 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-17 03:37:45,376 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2024-11-17 03:37:45,377 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-17 03:37:45,377 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-17 03:37:45,377 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2024-11-17 03:37:45,377 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-17 03:37:45,377 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-17 03:37:45,378 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-17 03:37:45,378 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-17 03:37:45,378 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-17 03:37:45,378 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-17 03:37:45,379 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-17 03:37:45,379 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-17 03:37:45,379 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-17 03:37:45,379 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-17 03:37:45,379 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-17 03:37:45,383 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-17 03:37:45,383 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 47814a6c2066a31334f0b50a42e69cfeb567d5dd7f02dc6c703588c90e067366 [2024-11-17 03:37:45,567 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-17 03:37:45,587 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-17 03:37:45,590 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-17 03:37:45,591 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-17 03:37:45,591 INFO L274 PluginConnector]: CDTParser initialized [2024-11-17 03:37:45,592 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/weaver/popl20-min-max-dec.wvr.c [2024-11-17 03:37:46,867 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-17 03:37:47,032 INFO L384 CDTParser]: Found 1 translation units. [2024-11-17 03:37:47,033 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-min-max-dec.wvr.c [2024-11-17 03:37:47,040 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7dc0ec0df/992eeaa9b4914cf9b1f02d145b452f25/FLAGf1437a300 [2024-11-17 03:37:47,421 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7dc0ec0df/992eeaa9b4914cf9b1f02d145b452f25 [2024-11-17 03:37:47,423 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-17 03:37:47,425 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-17 03:37:47,426 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-17 03:37:47,426 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-17 03:37:47,430 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-17 03:37:47,430 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.11 03:37:47" (1/1) ... [2024-11-17 03:37:47,431 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@69a18393 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:37:47, skipping insertion in model container [2024-11-17 03:37:47,431 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.11 03:37:47" (1/1) ... [2024-11-17 03:37:47,447 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-17 03:37:47,657 WARN L1072 CHandler]: saw a pointer cast to a type that we could not get a type size for, not adapting memory model [2024-11-17 03:37:47,658 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-17 03:37:47,664 INFO L200 MainTranslator]: Completed pre-run [2024-11-17 03:37:47,683 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-17 03:37:47,695 INFO L204 MainTranslator]: Completed translation [2024-11-17 03:37:47,696 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:37:47 WrapperNode [2024-11-17 03:37:47,696 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-17 03:37:47,696 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-17 03:37:47,697 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-17 03:37:47,697 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-17 03:37:47,701 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:37:47" (1/1) ... [2024-11-17 03:37:47,711 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:37:47" (1/1) ... [2024-11-17 03:37:47,726 INFO L138 Inliner]: procedures = 23, calls = 26, calls flagged for inlining = 9, calls inlined = 9, statements flattened = 118 [2024-11-17 03:37:47,726 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-17 03:37:47,726 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-17 03:37:47,726 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-17 03:37:47,727 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-17 03:37:47,734 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:37:47" (1/1) ... [2024-11-17 03:37:47,734 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:37:47" (1/1) ... [2024-11-17 03:37:47,740 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:37:47" (1/1) ... [2024-11-17 03:37:47,752 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]. [2024-11-17 03:37:47,753 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:37:47" (1/1) ... [2024-11-17 03:37:47,753 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:37:47" (1/1) ... [2024-11-17 03:37:47,763 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:37:47" (1/1) ... [2024-11-17 03:37:47,763 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:37:47" (1/1) ... [2024-11-17 03:37:47,764 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:37:47" (1/1) ... [2024-11-17 03:37:47,765 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:37:47" (1/1) ... [2024-11-17 03:37:47,769 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-17 03:37:47,769 INFO L112 PluginConnector]: ------------------------IcfgBuilder---------------------------- [2024-11-17 03:37:47,769 INFO L270 PluginConnector]: Initializing IcfgBuilder... [2024-11-17 03:37:47,769 INFO L274 PluginConnector]: IcfgBuilder initialized [2024-11-17 03:37:47,770 INFO L184 PluginConnector]: Executing the observer IcfgBuilderObserver from plugin IcfgBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:37:47" (1/1) ... [2024-11-17 03:37:47,774 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-17 03:37:47,782 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-17 03:37:47,800 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) [2024-11-17 03:37:47,802 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 [2024-11-17 03:37:47,838 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-17 03:37:47,838 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2024-11-17 03:37:47,838 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2024-11-17 03:37:47,839 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2024-11-17 03:37:47,839 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2024-11-17 03:37:47,839 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2024-11-17 03:37:47,839 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2024-11-17 03:37:47,839 INFO L130 BoogieDeclarations]: Found specification of procedure thread4 [2024-11-17 03:37:47,839 INFO L138 BoogieDeclarations]: Found implementation of procedure thread4 [2024-11-17 03:37:47,840 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-17 03:37:47,840 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-11-17 03:37:47,841 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-11-17 03:37:47,841 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-11-17 03:37:47,841 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-11-17 03:37:47,841 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-17 03:37:47,841 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-17 03:37:47,842 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-11-17 03:37:47,842 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-11-17 03:37:47,844 WARN L225 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2024-11-17 03:37:47,942 INFO L256 CfgBuilder]: Building ICFG [2024-11-17 03:37:47,945 INFO L286 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-17 03:37:48,213 INFO L303 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-11-17 03:37:48,213 INFO L307 CfgBuilder]: Performing block encoding [2024-11-17 03:37:48,350 INFO L331 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-17 03:37:48,350 INFO L336 CfgBuilder]: Removed 0 assume(true) statements. [2024-11-17 03:37:48,350 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 17.11 03:37:48 BoogieIcfgContainer [2024-11-17 03:37:48,350 INFO L131 PluginConnector]: ------------------------ END IcfgBuilder---------------------------- [2024-11-17 03:37:48,352 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-17 03:37:48,352 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-17 03:37:48,356 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-17 03:37:48,356 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.11 03:37:47" (1/3) ... [2024-11-17 03:37:48,357 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7f31a5f9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.11 03:37:48, skipping insertion in model container [2024-11-17 03:37:48,357 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:37:47" (2/3) ... [2024-11-17 03:37:48,358 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7f31a5f9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.11 03:37:48, skipping insertion in model container [2024-11-17 03:37:48,359 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 17.11 03:37:48" (3/3) ... [2024-11-17 03:37:48,360 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-min-max-dec.wvr.c [2024-11-17 03:37:48,373 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-17 03:37:48,373 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 18 error locations. [2024-11-17 03:37:48,374 INFO L489 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-11-17 03:37:48,439 INFO L143 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2024-11-17 03:37:48,465 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 96 places, 93 transitions, 214 flow [2024-11-17 03:37:48,495 INFO L124 PetriNetUnfolderBase]: 10/89 cut-off events. [2024-11-17 03:37:48,495 INFO L125 PetriNetUnfolderBase]: For 4/4 co-relation queries the response was YES. [2024-11-17 03:37:48,502 INFO L83 FinitePrefix]: Finished finitePrefix Result has 106 conditions, 89 events. 10/89 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 255 event pairs, 0 based on Foata normal form. 0/61 useless extension candidates. Maximal degree in co-relation 81. Up to 2 conditions per place. [2024-11-17 03:37:48,502 INFO L82 GeneralOperation]: Start removeDead. Operand has 96 places, 93 transitions, 214 flow [2024-11-17 03:37:48,507 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 91 places, 88 transitions, 200 flow [2024-11-17 03:37:48,514 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-17 03:37:48,518 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;@c7c2074, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-17 03:37:48,518 INFO L334 AbstractCegarLoop]: Starting to check reachability of 36 error locations. [2024-11-17 03:37:48,522 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-11-17 03:37:48,522 INFO L124 PetriNetUnfolderBase]: 2/9 cut-off events. [2024-11-17 03:37:48,522 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-11-17 03:37:48,522 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-17 03:37:48,523 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2024-11-17 03:37:48,523 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 33 more)] === [2024-11-17 03:37:48,527 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 03:37:48,527 INFO L85 PathProgramCache]: Analyzing trace with hash -2140071082, now seen corresponding path program 1 times [2024-11-17 03:37:48,533 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 03:37:48,533 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [211485943] [2024-11-17 03:37:48,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:37:48,534 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 03:37:48,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:37:48,778 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-17 03:37:48,778 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-17 03:37:48,778 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [211485943] [2024-11-17 03:37:48,779 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [211485943] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-17 03:37:48,779 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-17 03:37:48,779 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-17 03:37:48,781 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [749442310] [2024-11-17 03:37:48,781 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-17 03:37:48,788 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-17 03:37:48,792 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-17 03:37:48,813 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-17 03:37:48,814 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-17 03:37:48,823 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 28 out of 93 [2024-11-17 03:37:48,826 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 91 places, 88 transitions, 200 flow. Second operand has 3 states, 3 states have (on average 29.666666666666668) internal successors, (89), 3 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-17 03:37:48,826 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-17 03:37:48,826 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 28 of 93 [2024-11-17 03:37:48,827 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-17 03:37:53,873 INFO L124 PetriNetUnfolderBase]: 59321/85455 cut-off events. [2024-11-17 03:37:53,873 INFO L125 PetriNetUnfolderBase]: For 2746/2746 co-relation queries the response was YES. [2024-11-17 03:37:54,003 INFO L83 FinitePrefix]: Finished finitePrefix Result has 164192 conditions, 85455 events. 59321/85455 cut-off events. For 2746/2746 co-relation queries the response was YES. Maximal size of possible extension queue 3689. Compared 662080 event pairs, 45080 based on Foata normal form. 6395/64017 useless extension candidates. Maximal degree in co-relation 159263. Up to 75032 conditions per place. [2024-11-17 03:37:54,339 INFO L140 encePairwiseOnDemand]: 83/93 looper letters, 54 selfloop transitions, 2 changer transitions 0/79 dead transitions. [2024-11-17 03:37:54,339 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 88 places, 79 transitions, 294 flow [2024-11-17 03:37:54,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-17 03:37:54,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-17 03:37:54,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 148 transitions. [2024-11-17 03:37:54,350 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5304659498207885 [2024-11-17 03:37:54,352 INFO L175 Difference]: Start difference. First operand has 91 places, 88 transitions, 200 flow. Second operand 3 states and 148 transitions. [2024-11-17 03:37:54,352 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 88 places, 79 transitions, 294 flow [2024-11-17 03:37:54,499 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 79 transitions, 278 flow, removed 0 selfloop flow, removed 8 redundant places. [2024-11-17 03:37:54,501 INFO L231 Difference]: Finished difference. Result has 80 places, 79 transitions, 170 flow [2024-11-17 03:37:54,503 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=93, PETRI_DIFFERENCE_MINUEND_FLOW=166, PETRI_DIFFERENCE_MINUEND_PLACES=78, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=79, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=77, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=170, PETRI_PLACES=80, PETRI_TRANSITIONS=79} [2024-11-17 03:37:54,506 INFO L277 CegarLoopForPetriNet]: 91 programPoint places, -11 predicate places. [2024-11-17 03:37:54,507 INFO L471 AbstractCegarLoop]: Abstraction has has 80 places, 79 transitions, 170 flow [2024-11-17 03:37:54,507 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 29.666666666666668) internal successors, (89), 3 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-17 03:37:54,507 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-17 03:37:54,507 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2024-11-17 03:37:54,509 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-17 03:37:54,509 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 33 more)] === [2024-11-17 03:37:54,510 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 03:37:54,511 INFO L85 PathProgramCache]: Analyzing trace with hash -2140071081, now seen corresponding path program 1 times [2024-11-17 03:37:54,511 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 03:37:54,511 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1959612372] [2024-11-17 03:37:54,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:37:54,511 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 03:37:54,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:37:54,759 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-17 03:37:54,759 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-17 03:37:54,760 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1959612372] [2024-11-17 03:37:54,760 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1959612372] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-17 03:37:54,760 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-17 03:37:54,760 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-17 03:37:54,760 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1133812653] [2024-11-17 03:37:54,760 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-17 03:37:54,761 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-17 03:37:54,761 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-17 03:37:54,762 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-17 03:37:54,762 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-11-17 03:37:54,792 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 27 out of 93 [2024-11-17 03:37:54,793 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 80 places, 79 transitions, 170 flow. Second operand has 6 states, 6 states have (on average 27.833333333333332) internal successors, (167), 6 states have internal predecessors, (167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-17 03:37:54,794 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-17 03:37:54,794 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 27 of 93 [2024-11-17 03:37:54,795 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-17 03:37:59,087 INFO L124 PetriNetUnfolderBase]: 59321/85458 cut-off events. [2024-11-17 03:37:59,087 INFO L125 PetriNetUnfolderBase]: For 360/360 co-relation queries the response was YES. [2024-11-17 03:37:59,174 INFO L83 FinitePrefix]: Finished finitePrefix Result has 162087 conditions, 85458 events. 59321/85458 cut-off events. For 360/360 co-relation queries the response was YES. Maximal size of possible extension queue 3689. Compared 662137 event pairs, 45080 based on Foata normal form. 0/57623 useless extension candidates. Maximal degree in co-relation 162060. Up to 75034 conditions per place. [2024-11-17 03:37:59,437 INFO L140 encePairwiseOnDemand]: 88/93 looper letters, 57 selfloop transitions, 3 changer transitions 0/81 dead transitions. [2024-11-17 03:37:59,437 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 84 places, 81 transitions, 294 flow [2024-11-17 03:37:59,438 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-17 03:37:59,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-17 03:37:59,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 197 transitions. [2024-11-17 03:37:59,442 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4236559139784946 [2024-11-17 03:37:59,443 INFO L175 Difference]: Start difference. First operand has 80 places, 79 transitions, 170 flow. Second operand 5 states and 197 transitions. [2024-11-17 03:37:59,443 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 84 places, 81 transitions, 294 flow [2024-11-17 03:37:59,444 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 82 places, 81 transitions, 290 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-17 03:37:59,447 INFO L231 Difference]: Finished difference. Result has 83 places, 80 transitions, 182 flow [2024-11-17 03:37:59,448 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=93, PETRI_DIFFERENCE_MINUEND_FLOW=166, PETRI_DIFFERENCE_MINUEND_PLACES=78, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=79, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=76, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=182, PETRI_PLACES=83, PETRI_TRANSITIONS=80} [2024-11-17 03:37:59,448 INFO L277 CegarLoopForPetriNet]: 91 programPoint places, -8 predicate places. [2024-11-17 03:37:59,448 INFO L471 AbstractCegarLoop]: Abstraction has has 83 places, 80 transitions, 182 flow [2024-11-17 03:37:59,448 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) [2024-11-17 03:37:59,448 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-17 03:37:59,449 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1] [2024-11-17 03:37:59,449 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-17 03:37:59,449 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 33 more)] === [2024-11-17 03:37:59,449 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 03:37:59,449 INFO L85 PathProgramCache]: Analyzing trace with hash -362565092, now seen corresponding path program 1 times [2024-11-17 03:37:59,449 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 03:37:59,449 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2081469869] [2024-11-17 03:37:59,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:37:59,450 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 03:37:59,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:37:59,666 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-17 03:37:59,667 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-17 03:37:59,667 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2081469869] [2024-11-17 03:37:59,667 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2081469869] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-17 03:37:59,667 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [709759624] [2024-11-17 03:37:59,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:37:59,668 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-17 03:37:59,668 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-17 03:37:59,669 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) [2024-11-17 03:37:59,671 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-17 03:37:59,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:37:59,728 INFO L255 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 17 conjuncts are in the unsatisfiable core [2024-11-17 03:37:59,738 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-17 03:37:59,798 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2024-11-17 03:37:59,986 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-17 03:37:59,986 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-17 03:38:00,178 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-17 03:38:00,178 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [709759624] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-17 03:38:00,178 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-17 03:38:00,179 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 13 [2024-11-17 03:38:00,179 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1964797152] [2024-11-17 03:38:00,179 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-17 03:38:00,179 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-11-17 03:38:00,180 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-17 03:38:00,181 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-11-17 03:38:00,181 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=166, Unknown=0, NotChecked=0, Total=210 [2024-11-17 03:38:00,358 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 27 out of 93 [2024-11-17 03:38:00,359 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 83 places, 80 transitions, 182 flow. Second operand has 15 states, 15 states have (on average 28.266666666666666) internal successors, (424), 15 states have internal predecessors, (424), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-17 03:38:00,359 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-17 03:38:00,359 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 27 of 93 [2024-11-17 03:38:00,359 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-17 03:38:04,798 INFO L124 PetriNetUnfolderBase]: 59322/85462 cut-off events. [2024-11-17 03:38:04,798 INFO L125 PetriNetUnfolderBase]: For 363/363 co-relation queries the response was YES. [2024-11-17 03:38:04,913 INFO L83 FinitePrefix]: Finished finitePrefix Result has 162101 conditions, 85462 events. 59322/85462 cut-off events. For 363/363 co-relation queries the response was YES. Maximal size of possible extension queue 3689. Compared 662256 event pairs, 45080 based on Foata normal form. 0/57629 useless extension candidates. Maximal degree in co-relation 162082. Up to 75030 conditions per place. [2024-11-17 03:38:05,361 INFO L140 encePairwiseOnDemand]: 87/93 looper letters, 54 selfloop transitions, 9 changer transitions 0/84 dead transitions. [2024-11-17 03:38:05,361 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 90 places, 84 transitions, 318 flow [2024-11-17 03:38:05,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-17 03:38:05,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-11-17 03:38:05,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 308 transitions. [2024-11-17 03:38:05,363 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.36798088410991636 [2024-11-17 03:38:05,363 INFO L175 Difference]: Start difference. First operand has 83 places, 80 transitions, 182 flow. Second operand 9 states and 308 transitions. [2024-11-17 03:38:05,363 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 90 places, 84 transitions, 318 flow [2024-11-17 03:38:05,364 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 88 places, 84 transitions, 315 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-17 03:38:05,365 INFO L231 Difference]: Finished difference. Result has 88 places, 83 transitions, 205 flow [2024-11-17 03:38:05,365 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=93, PETRI_DIFFERENCE_MINUEND_FLOW=175, PETRI_DIFFERENCE_MINUEND_PLACES=80, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=79, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=205, PETRI_PLACES=88, PETRI_TRANSITIONS=83} [2024-11-17 03:38:05,365 INFO L277 CegarLoopForPetriNet]: 91 programPoint places, -3 predicate places. [2024-11-17 03:38:05,366 INFO L471 AbstractCegarLoop]: Abstraction has has 88 places, 83 transitions, 205 flow [2024-11-17 03:38:05,366 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) [2024-11-17 03:38:05,366 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-17 03:38:05,366 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-17 03:38:05,379 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-11-17 03:38:05,570 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 [2024-11-17 03:38:05,573 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 33 more)] === [2024-11-17 03:38:05,573 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 03:38:05,573 INFO L85 PathProgramCache]: Analyzing trace with hash 663670459, now seen corresponding path program 1 times [2024-11-17 03:38:05,577 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 03:38:05,577 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [790353350] [2024-11-17 03:38:05,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:38:05,578 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 03:38:05,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:38:05,621 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-17 03:38:05,622 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-17 03:38:05,622 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [790353350] [2024-11-17 03:38:05,622 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [790353350] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-17 03:38:05,622 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-17 03:38:05,622 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-17 03:38:05,623 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [158447824] [2024-11-17 03:38:05,623 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-17 03:38:05,623 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-17 03:38:05,623 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-17 03:38:05,624 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-17 03:38:05,624 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-17 03:38:05,629 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 28 out of 93 [2024-11-17 03:38:05,629 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 88 places, 83 transitions, 205 flow. Second operand has 4 states, 4 states have (on average 30.0) internal successors, (120), 4 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-17 03:38:05,629 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-17 03:38:05,629 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 28 of 93 [2024-11-17 03:38:05,629 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-17 03:38:08,178 INFO L124 PetriNetUnfolderBase]: 32962/48912 cut-off events. [2024-11-17 03:38:08,178 INFO L125 PetriNetUnfolderBase]: For 246/246 co-relation queries the response was YES. [2024-11-17 03:38:08,240 INFO L83 FinitePrefix]: Finished finitePrefix Result has 91702 conditions, 48912 events. 32962/48912 cut-off events. For 246/246 co-relation queries the response was YES. Maximal size of possible extension queue 2023. Compared 369926 event pairs, 24908 based on Foata normal form. 0/37263 useless extension candidates. Maximal degree in co-relation 91680. Up to 41857 conditions per place. [2024-11-17 03:38:08,370 INFO L140 encePairwiseOnDemand]: 85/93 looper letters, 52 selfloop transitions, 3 changer transitions 0/77 dead transitions. [2024-11-17 03:38:08,371 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 85 places, 77 transitions, 303 flow [2024-11-17 03:38:08,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-17 03:38:08,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-17 03:38:08,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 168 transitions. [2024-11-17 03:38:08,372 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.45161290322580644 [2024-11-17 03:38:08,372 INFO L175 Difference]: Start difference. First operand has 88 places, 83 transitions, 205 flow. Second operand 4 states and 168 transitions. [2024-11-17 03:38:08,372 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 85 places, 77 transitions, 303 flow [2024-11-17 03:38:08,373 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 82 places, 77 transitions, 294 flow, removed 2 selfloop flow, removed 3 redundant places. [2024-11-17 03:38:08,373 INFO L231 Difference]: Finished difference. Result has 82 places, 77 transitions, 190 flow [2024-11-17 03:38:08,374 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=93, PETRI_DIFFERENCE_MINUEND_FLOW=184, PETRI_DIFFERENCE_MINUEND_PLACES=79, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=77, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=74, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=190, PETRI_PLACES=82, PETRI_TRANSITIONS=77} [2024-11-17 03:38:08,374 INFO L277 CegarLoopForPetriNet]: 91 programPoint places, -9 predicate places. [2024-11-17 03:38:08,374 INFO L471 AbstractCegarLoop]: Abstraction has has 82 places, 77 transitions, 190 flow [2024-11-17 03:38:08,375 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 30.0) internal successors, (120), 4 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-17 03:38:08,375 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-17 03:38:08,375 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-17 03:38:08,375 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-11-17 03:38:08,375 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 33 more)] === [2024-11-17 03:38:08,375 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 03:38:08,375 INFO L85 PathProgramCache]: Analyzing trace with hash 663670460, now seen corresponding path program 1 times [2024-11-17 03:38:08,376 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 03:38:08,376 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1747344751] [2024-11-17 03:38:08,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:38:08,376 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 03:38:08,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:38:08,498 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-17 03:38:08,499 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-17 03:38:08,499 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1747344751] [2024-11-17 03:38:08,499 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1747344751] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-17 03:38:08,499 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [159591722] [2024-11-17 03:38:08,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:38:08,499 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-17 03:38:08,500 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-17 03:38:08,502 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) [2024-11-17 03:38:08,504 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-17 03:38:08,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:38:08,556 INFO L255 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 13 conjuncts are in the unsatisfiable core [2024-11-17 03:38:08,557 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-17 03:38:08,565 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 [2024-11-17 03:38:08,618 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-17 03:38:08,618 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-17 03:38:08,670 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-17 03:38:08,674 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [159591722] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-17 03:38:08,674 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-11-17 03:38:08,674 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5, 4] total 9 [2024-11-17 03:38:08,674 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1312364738] [2024-11-17 03:38:08,674 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-17 03:38:08,675 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-17 03:38:08,675 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-17 03:38:08,675 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-17 03:38:08,675 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-11-17 03:38:08,685 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 29 out of 93 [2024-11-17 03:38:08,686 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 82 places, 77 transitions, 190 flow. Second operand has 5 states, 5 states have (on average 30.6) internal successors, (153), 5 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-17 03:38:08,686 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-17 03:38:08,686 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 29 of 93 [2024-11-17 03:38:08,686 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-17 03:38:10,652 INFO L124 PetriNetUnfolderBase]: 27448/40992 cut-off events. [2024-11-17 03:38:10,653 INFO L125 PetriNetUnfolderBase]: For 228/228 co-relation queries the response was YES. [2024-11-17 03:38:10,706 INFO L83 FinitePrefix]: Finished finitePrefix Result has 76500 conditions, 40992 events. 27448/40992 cut-off events. For 228/228 co-relation queries the response was YES. Maximal size of possible extension queue 1743. Compared 307877 event pairs, 20228 based on Foata normal form. 0/32272 useless extension candidates. Maximal degree in co-relation 76479. Up to 34744 conditions per place. [2024-11-17 03:38:10,836 INFO L140 encePairwiseOnDemand]: 88/93 looper letters, 49 selfloop transitions, 4 changer transitions 0/75 dead transitions. [2024-11-17 03:38:10,836 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 84 places, 75 transitions, 292 flow [2024-11-17 03:38:10,837 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-17 03:38:10,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-17 03:38:10,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 197 transitions. [2024-11-17 03:38:10,837 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4236559139784946 [2024-11-17 03:38:10,837 INFO L175 Difference]: Start difference. First operand has 82 places, 77 transitions, 190 flow. Second operand 5 states and 197 transitions. [2024-11-17 03:38:10,838 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 84 places, 75 transitions, 292 flow [2024-11-17 03:38:10,839 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 82 places, 75 transitions, 288 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-17 03:38:10,840 INFO L231 Difference]: Finished difference. Result has 82 places, 75 transitions, 190 flow [2024-11-17 03:38:10,840 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=93, PETRI_DIFFERENCE_MINUEND_FLOW=182, PETRI_DIFFERENCE_MINUEND_PLACES=78, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=75, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=71, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=190, PETRI_PLACES=82, PETRI_TRANSITIONS=75} [2024-11-17 03:38:10,840 INFO L277 CegarLoopForPetriNet]: 91 programPoint places, -9 predicate places. [2024-11-17 03:38:10,840 INFO L471 AbstractCegarLoop]: Abstraction has has 82 places, 75 transitions, 190 flow [2024-11-17 03:38:10,841 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 30.6) internal successors, (153), 5 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-17 03:38:10,841 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-17 03:38:10,841 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-17 03:38:10,853 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-11-17 03:38:11,041 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 [2024-11-17 03:38:11,042 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting thread3Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 33 more)] === [2024-11-17 03:38:11,042 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 03:38:11,042 INFO L85 PathProgramCache]: Analyzing trace with hash 397373343, now seen corresponding path program 1 times [2024-11-17 03:38:11,042 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 03:38:11,042 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1579235975] [2024-11-17 03:38:11,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:38:11,042 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 03:38:11,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:38:11,185 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-17 03:38:11,187 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-17 03:38:11,187 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1579235975] [2024-11-17 03:38:11,189 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1579235975] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-17 03:38:11,189 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [370206254] [2024-11-17 03:38:11,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:38:11,189 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-17 03:38:11,190 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-17 03:38:11,191 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) [2024-11-17 03:38:11,192 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-17 03:38:11,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:38:11,254 INFO L255 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-11-17 03:38:11,255 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-17 03:38:11,346 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-17 03:38:11,346 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-17 03:38:11,408 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 [2024-11-17 03:38:11,421 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-17 03:38:11,421 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [370206254] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-17 03:38:11,421 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-17 03:38:11,421 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2024-11-17 03:38:11,421 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [80344736] [2024-11-17 03:38:11,422 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-17 03:38:11,422 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-11-17 03:38:11,422 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-17 03:38:11,422 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-11-17 03:38:11,423 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2024-11-17 03:38:11,476 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 29 out of 93 [2024-11-17 03:38:11,477 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 82 places, 75 transitions, 190 flow. Second operand has 11 states, 11 states have (on average 31.363636363636363) internal successors, (345), 11 states have internal predecessors, (345), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-17 03:38:11,477 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-17 03:38:11,477 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 29 of 93 [2024-11-17 03:38:11,477 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-17 03:38:14,712 INFO L124 PetriNetUnfolderBase]: 42209/59695 cut-off events. [2024-11-17 03:38:14,712 INFO L125 PetriNetUnfolderBase]: For 406/406 co-relation queries the response was YES. [2024-11-17 03:38:14,815 INFO L83 FinitePrefix]: Finished finitePrefix Result has 113992 conditions, 59695 events. 42209/59695 cut-off events. For 406/406 co-relation queries the response was YES. Maximal size of possible extension queue 2297. Compared 419509 event pairs, 10502 based on Foata normal form. 0/51400 useless extension candidates. Maximal degree in co-relation 113970. Up to 19718 conditions per place. [2024-11-17 03:38:15,025 INFO L140 encePairwiseOnDemand]: 84/93 looper letters, 100 selfloop transitions, 9 changer transitions 0/131 dead transitions. [2024-11-17 03:38:15,025 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 87 places, 131 transitions, 526 flow [2024-11-17 03:38:15,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-17 03:38:15,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-11-17 03:38:15,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 312 transitions. [2024-11-17 03:38:15,026 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4792626728110599 [2024-11-17 03:38:15,026 INFO L175 Difference]: Start difference. First operand has 82 places, 75 transitions, 190 flow. Second operand 7 states and 312 transitions. [2024-11-17 03:38:15,027 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 87 places, 131 transitions, 526 flow [2024-11-17 03:38:15,028 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 84 places, 131 transitions, 520 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-11-17 03:38:15,029 INFO L231 Difference]: Finished difference. Result has 86 places, 77 transitions, 222 flow [2024-11-17 03:38:15,029 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=93, PETRI_DIFFERENCE_MINUEND_FLOW=182, PETRI_DIFFERENCE_MINUEND_PLACES=78, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=74, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=222, PETRI_PLACES=86, PETRI_TRANSITIONS=77} [2024-11-17 03:38:15,030 INFO L277 CegarLoopForPetriNet]: 91 programPoint places, -5 predicate places. [2024-11-17 03:38:15,030 INFO L471 AbstractCegarLoop]: Abstraction has has 86 places, 77 transitions, 222 flow [2024-11-17 03:38:15,030 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 31.363636363636363) internal successors, (345), 11 states have internal predecessors, (345), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-17 03:38:15,030 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-17 03:38:15,030 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-17 03:38:15,043 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2024-11-17 03:38:15,231 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 [2024-11-17 03:38:15,231 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 33 more)] === [2024-11-17 03:38:15,231 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 03:38:15,232 INFO L85 PathProgramCache]: Analyzing trace with hash 400447098, now seen corresponding path program 1 times [2024-11-17 03:38:15,232 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 03:38:15,232 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1248924349] [2024-11-17 03:38:15,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:38:15,232 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 03:38:15,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:38:15,386 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-17 03:38:15,387 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-17 03:38:15,387 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1248924349] [2024-11-17 03:38:15,387 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1248924349] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-17 03:38:15,387 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2078123445] [2024-11-17 03:38:15,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:38:15,387 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-17 03:38:15,387 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-17 03:38:15,389 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) [2024-11-17 03:38:15,390 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-17 03:38:15,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:38:15,447 INFO L255 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 5 conjuncts are in the unsatisfiable core [2024-11-17 03:38:15,448 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-17 03:38:15,492 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-17 03:38:15,492 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-17 03:38:15,492 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2078123445] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-17 03:38:15,492 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-17 03:38:15,492 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 8 [2024-11-17 03:38:15,493 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1463766436] [2024-11-17 03:38:15,493 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-17 03:38:15,493 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-17 03:38:15,493 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-17 03:38:15,494 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-17 03:38:15,494 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-11-17 03:38:15,500 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 28 out of 93 [2024-11-17 03:38:15,500 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 77 transitions, 222 flow. Second operand has 4 states, 4 states have (on average 31.0) internal successors, (124), 4 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-17 03:38:15,500 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-17 03:38:15,500 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 28 of 93 [2024-11-17 03:38:15,500 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-17 03:38:19,566 INFO L124 PetriNetUnfolderBase]: 48801/77166 cut-off events. [2024-11-17 03:38:19,566 INFO L125 PetriNetUnfolderBase]: For 18526/18526 co-relation queries the response was YES. [2024-11-17 03:38:19,752 INFO L83 FinitePrefix]: Finished finitePrefix Result has 154142 conditions, 77166 events. 48801/77166 cut-off events. For 18526/18526 co-relation queries the response was YES. Maximal size of possible extension queue 2437. Compared 649304 event pairs, 6747 based on Foata normal form. 0/67407 useless extension candidates. Maximal degree in co-relation 154118. Up to 44274 conditions per place. [2024-11-17 03:38:19,995 INFO L140 encePairwiseOnDemand]: 87/93 looper letters, 107 selfloop transitions, 5 changer transitions 0/133 dead transitions. [2024-11-17 03:38:19,995 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 89 places, 133 transitions, 612 flow [2024-11-17 03:38:19,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-17 03:38:19,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-17 03:38:19,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 211 transitions. [2024-11-17 03:38:19,998 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5672043010752689 [2024-11-17 03:38:19,998 INFO L175 Difference]: Start difference. First operand has 86 places, 77 transitions, 222 flow. Second operand 4 states and 211 transitions. [2024-11-17 03:38:19,998 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 89 places, 133 transitions, 612 flow [2024-11-17 03:38:20,007 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 86 places, 133 transitions, 606 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-11-17 03:38:20,009 INFO L231 Difference]: Finished difference. Result has 88 places, 81 transitions, 249 flow [2024-11-17 03:38:20,009 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=93, PETRI_DIFFERENCE_MINUEND_FLOW=216, PETRI_DIFFERENCE_MINUEND_PLACES=83, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=77, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=72, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=249, PETRI_PLACES=88, PETRI_TRANSITIONS=81} [2024-11-17 03:38:20,009 INFO L277 CegarLoopForPetriNet]: 91 programPoint places, -3 predicate places. [2024-11-17 03:38:20,009 INFO L471 AbstractCegarLoop]: Abstraction has has 88 places, 81 transitions, 249 flow [2024-11-17 03:38:20,010 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 31.0) internal successors, (124), 4 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-17 03:38:20,010 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-17 03:38:20,010 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-17 03:38:20,023 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2024-11-17 03:38:20,210 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 [2024-11-17 03:38:20,210 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 33 more)] === [2024-11-17 03:38:20,211 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 03:38:20,211 INFO L85 PathProgramCache]: Analyzing trace with hash -944589040, now seen corresponding path program 1 times [2024-11-17 03:38:20,211 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 03:38:20,211 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [286972769] [2024-11-17 03:38:20,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:38:20,211 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 03:38:20,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:38:20,553 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-17 03:38:20,553 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-17 03:38:20,553 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [286972769] [2024-11-17 03:38:20,553 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [286972769] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-17 03:38:20,554 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [128735355] [2024-11-17 03:38:20,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:38:20,554 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-17 03:38:20,554 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-17 03:38:20,557 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) [2024-11-17 03:38:20,558 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-17 03:38:20,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:38:20,618 INFO L255 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 5 conjuncts are in the unsatisfiable core [2024-11-17 03:38:20,619 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-17 03:38:20,663 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-17 03:38:20,664 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-17 03:38:20,664 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [128735355] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-17 03:38:20,664 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-17 03:38:20,664 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 8 [2024-11-17 03:38:20,664 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [480563034] [2024-11-17 03:38:20,664 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-17 03:38:20,665 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-17 03:38:20,665 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-17 03:38:20,665 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-17 03:38:20,665 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-11-17 03:38:20,671 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 28 out of 93 [2024-11-17 03:38:20,671 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 88 places, 81 transitions, 249 flow. Second operand has 4 states, 4 states have (on average 31.5) internal successors, (126), 4 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-17 03:38:20,672 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-17 03:38:20,672 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 28 of 93 [2024-11-17 03:38:20,672 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand