./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/weaver/chl-word-trans.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 803cd42f Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i ../sv-benchmarks/c/weaver/chl-word-trans.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 9cb2b0cbecf02e8cce2fd890595fb88c3204482a27ce7ac6f4ef6fb92949d747 --- Real Ultimate output --- This is Ultimate 0.2.5-tmp.dk.eval-assert-order-craig-803cd42-m [2024-11-22 21:44:02,835 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-22 21:44:02,895 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2024-11-22 21:44:02,900 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-22 21:44:02,902 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-22 21:44:02,922 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-22 21:44:02,923 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-22 21:44:02,923 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-22 21:44:02,924 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-22 21:44:02,924 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-22 21:44:02,924 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-22 21:44:02,925 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-22 21:44:02,925 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-22 21:44:02,925 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-22 21:44:02,927 INFO L153 SettingsManager]: * Use SBE=true [2024-11-22 21:44:02,927 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-22 21:44:02,927 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-22 21:44:02,927 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-22 21:44:02,927 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-22 21:44:02,928 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-22 21:44:02,928 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2024-11-22 21:44:02,930 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2024-11-22 21:44:02,931 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2024-11-22 21:44:02,931 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-22 21:44:02,931 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-11-22 21:44:02,931 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-22 21:44:02,931 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2024-11-22 21:44:02,931 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-22 21:44:02,932 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-22 21:44:02,932 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-22 21:44:02,932 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-22 21:44:02,932 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-22 21:44:02,932 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-22 21:44:02,932 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-22 21:44:02,932 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-22 21:44:02,933 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-22 21:44:02,933 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-22 21:44:02,933 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-22 21:44:02,933 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-22 21:44:02,933 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-22 21:44:02,933 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-22 21:44:02,934 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-22 21:44:02,934 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 9cb2b0cbecf02e8cce2fd890595fb88c3204482a27ce7ac6f4ef6fb92949d747 [2024-11-22 21:44:03,119 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-22 21:44:03,135 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-22 21:44:03,136 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-22 21:44:03,138 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-22 21:44:03,139 INFO L274 PluginConnector]: CDTParser initialized [2024-11-22 21:44:03,140 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/weaver/chl-word-trans.wvr.c [2024-11-22 21:44:04,324 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-22 21:44:04,481 INFO L384 CDTParser]: Found 1 translation units. [2024-11-22 21:44:04,482 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/chl-word-trans.wvr.c [2024-11-22 21:44:04,488 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/643ab237b/8baee124b0a344beae4dfc083dd1a54b/FLAG8bd5422c8 [2024-11-22 21:44:04,498 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/643ab237b/8baee124b0a344beae4dfc083dd1a54b [2024-11-22 21:44:04,500 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-22 21:44:04,501 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-22 21:44:04,501 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-22 21:44:04,508 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-22 21:44:04,514 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-22 21:44:04,514 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 09:44:04" (1/1) ... [2024-11-22 21:44:04,515 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2125a3a5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 09:44:04, skipping insertion in model container [2024-11-22 21:44:04,515 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 09:44:04" (1/1) ... [2024-11-22 21:44:04,532 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-22 21:44:04,702 WARN L1070 CHandler]: saw a pointer cast to a type that we could not get a type size for, not adapting memory model [2024-11-22 21:44:04,705 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-22 21:44:04,714 INFO L200 MainTranslator]: Completed pre-run [2024-11-22 21:44:04,735 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-22 21:44:04,749 INFO L204 MainTranslator]: Completed translation [2024-11-22 21:44:04,749 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 09:44:04 WrapperNode [2024-11-22 21:44:04,749 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-22 21:44:04,750 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-22 21:44:04,750 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-22 21:44:04,750 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-22 21:44:04,756 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 09:44:04" (1/1) ... [2024-11-22 21:44:04,765 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 09:44:04" (1/1) ... [2024-11-22 21:44:04,785 INFO L138 Inliner]: procedures = 24, calls = 30, calls flagged for inlining = 9, calls inlined = 13, statements flattened = 167 [2024-11-22 21:44:04,785 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-22 21:44:04,786 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-22 21:44:04,786 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-22 21:44:04,786 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-22 21:44:04,797 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 09:44:04" (1/1) ... [2024-11-22 21:44:04,797 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 09:44:04" (1/1) ... [2024-11-22 21:44:04,803 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 09:44:04" (1/1) ... [2024-11-22 21:44:04,815 INFO L175 MemorySlicer]: Split 17 memory accesses to 2 slices as follows [2, 15]. 88 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0]. The 3 writes are split as follows [0, 3]. [2024-11-22 21:44:04,816 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 09:44:04" (1/1) ... [2024-11-22 21:44:04,816 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 09:44:04" (1/1) ... [2024-11-22 21:44:04,822 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 09:44:04" (1/1) ... [2024-11-22 21:44:04,825 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 09:44:04" (1/1) ... [2024-11-22 21:44:04,827 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 09:44:04" (1/1) ... [2024-11-22 21:44:04,828 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 09:44:04" (1/1) ... [2024-11-22 21:44:04,830 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-22 21:44:04,834 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-22 21:44:04,834 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-22 21:44:04,834 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-22 21:44:04,835 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 09:44:04" (1/1) ... [2024-11-22 21:44:04,845 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-22 21:44:04,854 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-22 21:44:04,867 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) [2024-11-22 21:44:04,869 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 [2024-11-22 21:44:04,903 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-22 21:44:04,903 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2024-11-22 21:44:04,904 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2024-11-22 21:44:04,904 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2024-11-22 21:44:04,904 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2024-11-22 21:44:04,904 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2024-11-22 21:44:04,904 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2024-11-22 21:44:04,904 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-22 21:44:04,904 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-11-22 21:44:04,904 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-11-22 21:44:04,905 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-11-22 21:44:04,905 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-11-22 21:44:04,905 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-22 21:44:04,905 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-22 21:44:04,905 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-11-22 21:44:04,905 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-11-22 21:44:04,907 WARN L207 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2024-11-22 21:44:04,994 INFO L238 CfgBuilder]: Building ICFG [2024-11-22 21:44:04,996 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-22 21:44:05,349 INFO L283 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-11-22 21:44:05,349 INFO L287 CfgBuilder]: Performing block encoding [2024-11-22 21:44:05,611 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-22 21:44:05,611 INFO L316 CfgBuilder]: Removed 6 assume(true) statements. [2024-11-22 21:44:05,612 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 09:44:05 BoogieIcfgContainer [2024-11-22 21:44:05,612 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-22 21:44:05,613 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-22 21:44:05,613 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-22 21:44:05,615 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-22 21:44:05,616 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.11 09:44:04" (1/3) ... [2024-11-22 21:44:05,616 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2c30d3ea and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.11 09:44:05, skipping insertion in model container [2024-11-22 21:44:05,616 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 09:44:04" (2/3) ... [2024-11-22 21:44:05,616 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2c30d3ea and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.11 09:44:05, skipping insertion in model container [2024-11-22 21:44:05,617 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 09:44:05" (3/3) ... [2024-11-22 21:44:05,617 INFO L112 eAbstractionObserver]: Analyzing ICFG chl-word-trans.wvr.c [2024-11-22 21:44:05,630 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-22 21:44:05,630 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 32 error locations. [2024-11-22 21:44:05,630 INFO L489 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-11-22 21:44:05,692 INFO L143 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2024-11-22 21:44:05,722 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 94 places, 96 transitions, 213 flow [2024-11-22 21:44:05,750 INFO L124 PetriNetUnfolderBase]: 12/93 cut-off events. [2024-11-22 21:44:05,750 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2024-11-22 21:44:05,755 INFO L83 FinitePrefix]: Finished finitePrefix Result has 106 conditions, 93 events. 12/93 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 316 event pairs, 0 based on Foata normal form. 0/49 useless extension candidates. Maximal degree in co-relation 72. Up to 2 conditions per place. [2024-11-22 21:44:05,755 INFO L82 GeneralOperation]: Start removeDead. Operand has 94 places, 96 transitions, 213 flow [2024-11-22 21:44:05,758 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 90 places, 92 transitions, 202 flow [2024-11-22 21:44:05,768 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-22 21:44:05,773 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;@77c1a126, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-22 21:44:05,774 INFO L334 AbstractCegarLoop]: Starting to check reachability of 59 error locations. [2024-11-22 21:44:05,776 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-11-22 21:44:05,777 INFO L124 PetriNetUnfolderBase]: 1/4 cut-off events. [2024-11-22 21:44:05,777 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-11-22 21:44:05,777 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 21:44:05,778 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2024-11-22 21:44:05,778 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2024-11-22 21:44:05,782 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 21:44:05,782 INFO L85 PathProgramCache]: Analyzing trace with hash 775074, now seen corresponding path program 1 times [2024-11-22 21:44:05,788 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 21:44:05,788 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [510195815] [2024-11-22 21:44:05,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 21:44:05,789 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 21:44:05,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 21:44:06,025 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-22 21:44:06,027 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 21:44:06,027 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [510195815] [2024-11-22 21:44:06,027 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [510195815] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-22 21:44:06,028 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-22 21:44:06,028 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-11-22 21:44:06,029 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [602616923] [2024-11-22 21:44:06,029 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-22 21:44:06,037 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-22 21:44:06,041 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 21:44:06,061 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-22 21:44:06,062 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-22 21:44:06,123 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 44 out of 96 [2024-11-22 21:44:06,126 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 90 places, 92 transitions, 202 flow. Second operand has 3 states, 3 states have (on average 45.0) internal successors, (135), 3 states have internal predecessors, (135), 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) [2024-11-22 21:44:06,127 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 21:44:06,127 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 44 of 96 [2024-11-22 21:44:06,128 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-22 21:44:06,552 INFO L124 PetriNetUnfolderBase]: 2712/4947 cut-off events. [2024-11-22 21:44:06,552 INFO L125 PetriNetUnfolderBase]: For 181/181 co-relation queries the response was YES. [2024-11-22 21:44:06,561 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8698 conditions, 4947 events. 2712/4947 cut-off events. For 181/181 co-relation queries the response was YES. Maximal size of possible extension queue 351. Compared 34503 event pairs, 1692 based on Foata normal form. 1/3396 useless extension candidates. Maximal degree in co-relation 8222. Up to 3567 conditions per place. [2024-11-22 21:44:06,584 INFO L140 encePairwiseOnDemand]: 90/96 looper letters, 45 selfloop transitions, 2 changer transitions 0/87 dead transitions. [2024-11-22 21:44:06,584 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 87 places, 87 transitions, 286 flow [2024-11-22 21:44:06,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-22 21:44:06,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-22 21:44:06,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 183 transitions. [2024-11-22 21:44:06,593 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6354166666666666 [2024-11-22 21:44:06,594 INFO L175 Difference]: Start difference. First operand has 90 places, 92 transitions, 202 flow. Second operand 3 states and 183 transitions. [2024-11-22 21:44:06,595 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 87 places, 87 transitions, 286 flow [2024-11-22 21:44:06,599 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 81 places, 87 transitions, 274 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-11-22 21:44:06,603 INFO L231 Difference]: Finished difference. Result has 81 places, 87 transitions, 184 flow [2024-11-22 21:44:06,604 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=96, PETRI_DIFFERENCE_MINUEND_FLOW=180, PETRI_DIFFERENCE_MINUEND_PLACES=79, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=87, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=85, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=184, PETRI_PLACES=81, PETRI_TRANSITIONS=87} [2024-11-22 21:44:06,608 INFO L277 CegarLoopForPetriNet]: 90 programPoint places, -9 predicate places. [2024-11-22 21:44:06,608 INFO L471 AbstractCegarLoop]: Abstraction has has 81 places, 87 transitions, 184 flow [2024-11-22 21:44:06,609 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 45.0) internal successors, (135), 3 states have internal predecessors, (135), 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) [2024-11-22 21:44:06,609 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 21:44:06,609 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2024-11-22 21:44:06,610 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-22 21:44:06,610 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2024-11-22 21:44:06,611 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 21:44:06,611 INFO L85 PathProgramCache]: Analyzing trace with hash 775075, now seen corresponding path program 1 times [2024-11-22 21:44:06,611 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 21:44:06,611 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1854484270] [2024-11-22 21:44:06,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 21:44:06,612 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 21:44:06,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 21:44:06,841 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-22 21:44:06,842 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 21:44:06,842 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1854484270] [2024-11-22 21:44:06,842 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1854484270] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-22 21:44:06,842 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-22 21:44:06,842 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-22 21:44:06,843 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [105454014] [2024-11-22 21:44:06,843 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-22 21:44:06,844 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-22 21:44:06,844 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 21:44:06,845 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-22 21:44:06,845 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-22 21:44:06,957 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 44 out of 96 [2024-11-22 21:44:06,958 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 87 transitions, 184 flow. Second operand has 4 states, 4 states have (on average 44.75) internal successors, (179), 4 states have internal predecessors, (179), 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) [2024-11-22 21:44:06,958 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 21:44:06,958 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 44 of 96 [2024-11-22 21:44:06,958 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-22 21:44:07,305 INFO L124 PetriNetUnfolderBase]: 2712/4946 cut-off events. [2024-11-22 21:44:07,305 INFO L125 PetriNetUnfolderBase]: For 42/42 co-relation queries the response was YES. [2024-11-22 21:44:07,313 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8585 conditions, 4946 events. 2712/4946 cut-off events. For 42/42 co-relation queries the response was YES. Maximal size of possible extension queue 351. Compared 34539 event pairs, 1692 based on Foata normal form. 0/3393 useless extension candidates. Maximal degree in co-relation 8556. Up to 3575 conditions per place. [2024-11-22 21:44:07,337 INFO L140 encePairwiseOnDemand]: 91/96 looper letters, 45 selfloop transitions, 4 changer transitions 0/86 dead transitions. [2024-11-22 21:44:07,337 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 83 places, 86 transitions, 280 flow [2024-11-22 21:44:07,338 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-22 21:44:07,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-22 21:44:07,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 226 transitions. [2024-11-22 21:44:07,341 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5885416666666666 [2024-11-22 21:44:07,341 INFO L175 Difference]: Start difference. First operand has 81 places, 87 transitions, 184 flow. Second operand 4 states and 226 transitions. [2024-11-22 21:44:07,341 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 83 places, 86 transitions, 280 flow [2024-11-22 21:44:07,342 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 81 places, 86 transitions, 276 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-22 21:44:07,344 INFO L231 Difference]: Finished difference. Result has 81 places, 86 transitions, 186 flow [2024-11-22 21:44:07,344 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=96, PETRI_DIFFERENCE_MINUEND_FLOW=178, PETRI_DIFFERENCE_MINUEND_PLACES=78, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=86, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=82, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=186, PETRI_PLACES=81, PETRI_TRANSITIONS=86} [2024-11-22 21:44:07,345 INFO L277 CegarLoopForPetriNet]: 90 programPoint places, -9 predicate places. [2024-11-22 21:44:07,345 INFO L471 AbstractCegarLoop]: Abstraction has has 81 places, 86 transitions, 186 flow [2024-11-22 21:44:07,345 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 44.75) internal successors, (179), 4 states have internal predecessors, (179), 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) [2024-11-22 21:44:07,346 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 21:44:07,346 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2024-11-22 21:44:07,346 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-22 21:44:07,346 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2024-11-22 21:44:07,347 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 21:44:07,348 INFO L85 PathProgramCache]: Analyzing trace with hash 24028939, now seen corresponding path program 1 times [2024-11-22 21:44:07,348 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 21:44:07,348 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [870076380] [2024-11-22 21:44:07,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 21:44:07,348 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 21:44:07,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 21:44:07,538 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-22 21:44:07,539 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 21:44:07,539 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [870076380] [2024-11-22 21:44:07,539 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [870076380] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-22 21:44:07,539 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-22 21:44:07,539 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-22 21:44:07,539 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1000666168] [2024-11-22 21:44:07,539 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-22 21:44:07,540 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-22 21:44:07,540 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 21:44:07,540 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-22 21:44:07,540 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-22 21:44:07,683 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 44 out of 96 [2024-11-22 21:44:07,684 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 86 transitions, 186 flow. Second operand has 5 states, 5 states have (on average 44.8) internal successors, (224), 5 states have internal predecessors, (224), 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) [2024-11-22 21:44:07,685 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 21:44:07,685 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 44 of 96 [2024-11-22 21:44:07,685 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-22 21:44:08,006 INFO L124 PetriNetUnfolderBase]: 2714/4952 cut-off events. [2024-11-22 21:44:08,006 INFO L125 PetriNetUnfolderBase]: For 42/42 co-relation queries the response was YES. [2024-11-22 21:44:08,012 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8602 conditions, 4952 events. 2714/4952 cut-off events. For 42/42 co-relation queries the response was YES. Maximal size of possible extension queue 355. Compared 34630 event pairs, 1692 based on Foata normal form. 0/3396 useless extension candidates. Maximal degree in co-relation 8578. Up to 3578 conditions per place. [2024-11-22 21:44:08,030 INFO L140 encePairwiseOnDemand]: 88/96 looper letters, 48 selfloop transitions, 7 changer transitions 0/92 dead transitions. [2024-11-22 21:44:08,030 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 85 places, 92 transitions, 314 flow [2024-11-22 21:44:08,030 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-22 21:44:08,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-22 21:44:08,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 276 transitions. [2024-11-22 21:44:08,032 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.575 [2024-11-22 21:44:08,032 INFO L175 Difference]: Start difference. First operand has 81 places, 86 transitions, 186 flow. Second operand 5 states and 276 transitions. [2024-11-22 21:44:08,032 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 85 places, 92 transitions, 314 flow [2024-11-22 21:44:08,032 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 82 places, 92 transitions, 300 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-11-22 21:44:08,036 INFO L231 Difference]: Finished difference. Result has 85 places, 92 transitions, 231 flow [2024-11-22 21:44:08,037 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=96, PETRI_DIFFERENCE_MINUEND_FLOW=178, PETRI_DIFFERENCE_MINUEND_PLACES=78, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=86, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=79, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=231, PETRI_PLACES=85, PETRI_TRANSITIONS=92} [2024-11-22 21:44:08,037 INFO L277 CegarLoopForPetriNet]: 90 programPoint places, -5 predicate places. [2024-11-22 21:44:08,037 INFO L471 AbstractCegarLoop]: Abstraction has has 85 places, 92 transitions, 231 flow [2024-11-22 21:44:08,037 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 44.8) internal successors, (224), 5 states have internal predecessors, (224), 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) [2024-11-22 21:44:08,037 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 21:44:08,038 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2024-11-22 21:44:08,038 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-11-22 21:44:08,038 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2024-11-22 21:44:08,038 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 21:44:08,038 INFO L85 PathProgramCache]: Analyzing trace with hash 744899006, now seen corresponding path program 1 times [2024-11-22 21:44:08,038 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 21:44:08,038 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [908584386] [2024-11-22 21:44:08,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 21:44:08,039 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 21:44:08,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 21:44:08,232 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-22 21:44:08,232 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 21:44:08,232 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [908584386] [2024-11-22 21:44:08,232 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [908584386] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-22 21:44:08,232 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-22 21:44:08,233 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-22 21:44:08,233 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1360234057] [2024-11-22 21:44:08,233 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-22 21:44:08,233 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-22 21:44:08,233 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 21:44:08,234 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-22 21:44:08,234 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-22 21:44:08,340 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 44 out of 96 [2024-11-22 21:44:08,341 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 85 places, 92 transitions, 231 flow. Second operand has 5 states, 5 states have (on average 45.0) internal successors, (225), 5 states have internal predecessors, (225), 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) [2024-11-22 21:44:08,341 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 21:44:08,341 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 44 of 96 [2024-11-22 21:44:08,341 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-22 21:44:08,707 INFO L124 PetriNetUnfolderBase]: 2715/4955 cut-off events. [2024-11-22 21:44:08,707 INFO L125 PetriNetUnfolderBase]: For 43/43 co-relation queries the response was YES. [2024-11-22 21:44:08,713 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8624 conditions, 4955 events. 2715/4955 cut-off events. For 43/43 co-relation queries the response was YES. Maximal size of possible extension queue 355. Compared 34648 event pairs, 1692 based on Foata normal form. 0/3401 useless extension candidates. Maximal degree in co-relation 8580. Up to 3581 conditions per place. [2024-11-22 21:44:08,726 INFO L140 encePairwiseOnDemand]: 87/96 looper letters, 49 selfloop transitions, 9 changer transitions 0/95 dead transitions. [2024-11-22 21:44:08,726 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 89 places, 95 transitions, 353 flow [2024-11-22 21:44:08,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-22 21:44:08,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-22 21:44:08,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 276 transitions. [2024-11-22 21:44:08,728 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.575 [2024-11-22 21:44:08,728 INFO L175 Difference]: Start difference. First operand has 85 places, 92 transitions, 231 flow. Second operand 5 states and 276 transitions. [2024-11-22 21:44:08,728 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 89 places, 95 transitions, 353 flow [2024-11-22 21:44:08,729 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 88 places, 95 transitions, 352 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-22 21:44:08,732 INFO L231 Difference]: Finished difference. Result has 90 places, 95 transitions, 273 flow [2024-11-22 21:44:08,732 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=96, PETRI_DIFFERENCE_MINUEND_FLOW=230, PETRI_DIFFERENCE_MINUEND_PLACES=84, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=92, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=83, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=273, PETRI_PLACES=90, PETRI_TRANSITIONS=95} [2024-11-22 21:44:08,733 INFO L277 CegarLoopForPetriNet]: 90 programPoint places, 0 predicate places. [2024-11-22 21:44:08,733 INFO L471 AbstractCegarLoop]: Abstraction has has 90 places, 95 transitions, 273 flow [2024-11-22 21:44:08,733 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 45.0) internal successors, (225), 5 states have internal predecessors, (225), 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) [2024-11-22 21:44:08,733 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 21:44:08,733 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2024-11-22 21:44:08,733 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-11-22 21:44:08,734 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2024-11-22 21:44:08,734 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 21:44:08,734 INFO L85 PathProgramCache]: Analyzing trace with hash 1616998019, now seen corresponding path program 1 times [2024-11-22 21:44:08,734 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 21:44:08,734 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [170251202] [2024-11-22 21:44:08,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 21:44:08,734 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 21:44:08,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 21:44:08,894 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-22 21:44:08,894 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 21:44:08,894 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [170251202] [2024-11-22 21:44:08,894 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [170251202] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-22 21:44:08,894 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2095016121] [2024-11-22 21:44:08,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 21:44:08,894 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 21:44:08,895 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-22 21:44:08,897 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) [2024-11-22 21:44:08,900 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-22 21:44:08,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 21:44:08,958 INFO L255 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 15 conjuncts are in the unsatisfiable core [2024-11-22 21:44:08,961 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-22 21:44:09,008 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 [2024-11-22 21:44:09,156 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-22 21:44:09,156 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-22 21:44:09,271 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-22 21:44:09,271 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2095016121] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-22 21:44:09,272 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-22 21:44:09,272 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 11 [2024-11-22 21:44:09,272 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [909856263] [2024-11-22 21:44:09,272 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-22 21:44:09,272 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-11-22 21:44:09,273 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 21:44:09,273 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-11-22 21:44:09,273 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2024-11-22 21:44:09,913 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 44 out of 96 [2024-11-22 21:44:09,914 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 90 places, 95 transitions, 273 flow. Second operand has 13 states, 13 states have (on average 45.30769230769231) internal successors, (589), 13 states have internal predecessors, (589), 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) [2024-11-22 21:44:09,914 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 21:44:09,914 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 44 of 96 [2024-11-22 21:44:09,915 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-22 21:44:10,375 INFO L124 PetriNetUnfolderBase]: 2717/4960 cut-off events. [2024-11-22 21:44:10,375 INFO L125 PetriNetUnfolderBase]: For 51/51 co-relation queries the response was YES. [2024-11-22 21:44:10,382 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8662 conditions, 4960 events. 2717/4960 cut-off events. For 51/51 co-relation queries the response was YES. Maximal size of possible extension queue 355. Compared 34697 event pairs, 1692 based on Foata normal form. 0/3409 useless extension candidates. Maximal degree in co-relation 8602. Up to 3575 conditions per place. [2024-11-22 21:44:10,395 INFO L140 encePairwiseOnDemand]: 88/96 looper letters, 45 selfloop transitions, 18 changer transitions 0/100 dead transitions. [2024-11-22 21:44:10,395 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 97 places, 100 transitions, 424 flow [2024-11-22 21:44:10,396 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-22 21:44:10,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-11-22 21:44:10,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 458 transitions. [2024-11-22 21:44:10,397 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5300925925925926 [2024-11-22 21:44:10,397 INFO L175 Difference]: Start difference. First operand has 90 places, 95 transitions, 273 flow. Second operand 9 states and 458 transitions. [2024-11-22 21:44:10,397 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 97 places, 100 transitions, 424 flow [2024-11-22 21:44:10,398 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 95 places, 100 transitions, 416 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-22 21:44:10,400 INFO L231 Difference]: Finished difference. Result has 95 places, 100 transitions, 326 flow [2024-11-22 21:44:10,400 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=96, PETRI_DIFFERENCE_MINUEND_FLOW=262, PETRI_DIFFERENCE_MINUEND_PLACES=87, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=94, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=82, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=326, PETRI_PLACES=95, PETRI_TRANSITIONS=100} [2024-11-22 21:44:10,400 INFO L277 CegarLoopForPetriNet]: 90 programPoint places, 5 predicate places. [2024-11-22 21:44:10,401 INFO L471 AbstractCegarLoop]: Abstraction has has 95 places, 100 transitions, 326 flow [2024-11-22 21:44:10,401 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 45.30769230769231) internal successors, (589), 13 states have internal predecessors, (589), 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) [2024-11-22 21:44:10,401 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 21:44:10,401 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1] [2024-11-22 21:44:10,409 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-11-22 21:44:10,602 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 21:44:10,603 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2024-11-22 21:44:10,603 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 21:44:10,604 INFO L85 PathProgramCache]: Analyzing trace with hash -1411568643, now seen corresponding path program 1 times [2024-11-22 21:44:10,604 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 21:44:10,604 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [106699389] [2024-11-22 21:44:10,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 21:44:10,604 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 21:44:10,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 21:44:10,769 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-22 21:44:10,770 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 21:44:10,770 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [106699389] [2024-11-22 21:44:10,770 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [106699389] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-22 21:44:10,770 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1661346280] [2024-11-22 21:44:10,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 21:44:10,770 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 21:44:10,770 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-22 21:44:10,772 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) [2024-11-22 21:44:10,773 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-22 21:44:10,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 21:44:10,835 INFO L255 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 16 conjuncts are in the unsatisfiable core [2024-11-22 21:44:10,837 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-22 21:44:10,855 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 [2024-11-22 21:44:11,022 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-22 21:44:11,022 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-22 21:44:11,137 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-22 21:44:11,137 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1661346280] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-22 21:44:11,137 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-22 21:44:11,137 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 11 [2024-11-22 21:44:11,138 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [431850018] [2024-11-22 21:44:11,138 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-22 21:44:11,138 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-11-22 21:44:11,138 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 21:44:11,138 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-11-22 21:44:11,139 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2024-11-22 21:44:11,738 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 44 out of 96 [2024-11-22 21:44:11,739 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 95 places, 100 transitions, 326 flow. Second operand has 13 states, 13 states have (on average 45.46153846153846) internal successors, (591), 13 states have internal predecessors, (591), 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) [2024-11-22 21:44:11,739 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 21:44:11,739 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 44 of 96 [2024-11-22 21:44:11,739 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-22 21:44:12,271 INFO L124 PetriNetUnfolderBase]: 2718/4962 cut-off events. [2024-11-22 21:44:12,272 INFO L125 PetriNetUnfolderBase]: For 50/50 co-relation queries the response was YES. [2024-11-22 21:44:12,279 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8682 conditions, 4962 events. 2718/4962 cut-off events. For 50/50 co-relation queries the response was YES. Maximal size of possible extension queue 355. Compared 34655 event pairs, 1692 based on Foata normal form. 0/3411 useless extension candidates. Maximal degree in co-relation 8610. Up to 3577 conditions per place. [2024-11-22 21:44:12,294 INFO L140 encePairwiseOnDemand]: 87/96 looper letters, 43 selfloop transitions, 22 changer transitions 0/102 dead transitions. [2024-11-22 21:44:12,294 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 102 places, 102 transitions, 464 flow [2024-11-22 21:44:12,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-22 21:44:12,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-11-22 21:44:12,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 457 transitions. [2024-11-22 21:44:12,296 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5289351851851852 [2024-11-22 21:44:12,296 INFO L175 Difference]: Start difference. First operand has 95 places, 100 transitions, 326 flow. Second operand 9 states and 457 transitions. [2024-11-22 21:44:12,296 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 102 places, 102 transitions, 464 flow [2024-11-22 21:44:12,297 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 96 places, 102 transitions, 418 flow, removed 10 selfloop flow, removed 6 redundant places. [2024-11-22 21:44:12,299 INFO L231 Difference]: Finished difference. Result has 96 places, 102 transitions, 332 flow [2024-11-22 21:44:12,299 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=96, PETRI_DIFFERENCE_MINUEND_FLOW=276, PETRI_DIFFERENCE_MINUEND_PLACES=88, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=99, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=80, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=332, PETRI_PLACES=96, PETRI_TRANSITIONS=102} [2024-11-22 21:44:12,299 INFO L277 CegarLoopForPetriNet]: 90 programPoint places, 6 predicate places. [2024-11-22 21:44:12,299 INFO L471 AbstractCegarLoop]: Abstraction has has 96 places, 102 transitions, 332 flow [2024-11-22 21:44:12,300 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 45.46153846153846) internal successors, (591), 13 states have internal predecessors, (591), 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) [2024-11-22 21:44:12,300 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 21:44:12,300 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 21:44:12,307 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-11-22 21:44:12,504 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2024-11-22 21:44:12,505 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2024-11-22 21:44:12,505 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 21:44:12,505 INFO L85 PathProgramCache]: Analyzing trace with hash 856152628, now seen corresponding path program 1 times [2024-11-22 21:44:12,506 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 21:44:12,506 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1950482320] [2024-11-22 21:44:12,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 21:44:12,506 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 21:44:12,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 21:44:12,559 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-22 21:44:12,559 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 21:44:12,559 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1950482320] [2024-11-22 21:44:12,559 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1950482320] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-22 21:44:12,559 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-22 21:44:12,560 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-22 21:44:12,560 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2064540554] [2024-11-22 21:44:12,560 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-22 21:44:12,560 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-22 21:44:12,560 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 21:44:12,561 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-22 21:44:12,561 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-22 21:44:12,582 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 46 out of 96 [2024-11-22 21:44:12,582 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 96 places, 102 transitions, 332 flow. Second operand has 5 states, 5 states have (on average 47.6) internal successors, (238), 5 states have internal predecessors, (238), 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) [2024-11-22 21:44:12,583 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 21:44:12,583 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 46 of 96 [2024-11-22 21:44:12,583 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-22 21:44:13,047 INFO L124 PetriNetUnfolderBase]: 5204/9287 cut-off events. [2024-11-22 21:44:13,047 INFO L125 PetriNetUnfolderBase]: For 88/88 co-relation queries the response was YES. [2024-11-22 21:44:13,059 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16450 conditions, 9287 events. 5204/9287 cut-off events. For 88/88 co-relation queries the response was YES. Maximal size of possible extension queue 584. Compared 69835 event pairs, 2894 based on Foata normal form. 0/6441 useless extension candidates. Maximal degree in co-relation 9726. Up to 4040 conditions per place. [2024-11-22 21:44:13,086 INFO L140 encePairwiseOnDemand]: 84/96 looper letters, 123 selfloop transitions, 18 changer transitions 0/177 dead transitions. [2024-11-22 21:44:13,086 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 101 places, 177 transitions, 842 flow [2024-11-22 21:44:13,087 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-22 21:44:13,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-22 21:44:13,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 395 transitions. [2024-11-22 21:44:13,088 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6857638888888888 [2024-11-22 21:44:13,088 INFO L175 Difference]: Start difference. First operand has 96 places, 102 transitions, 332 flow. Second operand 6 states and 395 transitions. [2024-11-22 21:44:13,088 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 101 places, 177 transitions, 842 flow [2024-11-22 21:44:13,090 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 95 places, 177 transitions, 764 flow, removed 12 selfloop flow, removed 6 redundant places. [2024-11-22 21:44:13,092 INFO L231 Difference]: Finished difference. Result has 98 places, 117 transitions, 443 flow [2024-11-22 21:44:13,092 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=96, PETRI_DIFFERENCE_MINUEND_FLOW=286, PETRI_DIFFERENCE_MINUEND_PLACES=90, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=102, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=84, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=443, PETRI_PLACES=98, PETRI_TRANSITIONS=117} [2024-11-22 21:44:13,093 INFO L277 CegarLoopForPetriNet]: 90 programPoint places, 8 predicate places. [2024-11-22 21:44:13,093 INFO L471 AbstractCegarLoop]: Abstraction has has 98 places, 117 transitions, 443 flow [2024-11-22 21:44:13,093 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 47.6) internal successors, (238), 5 states have internal predecessors, (238), 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) [2024-11-22 21:44:13,093 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 21:44:13,093 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 21:44:13,093 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-11-22 21:44:13,094 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2024-11-22 21:44:13,096 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 21:44:13,096 INFO L85 PathProgramCache]: Analyzing trace with hash 1918678218, now seen corresponding path program 1 times [2024-11-22 21:44:13,096 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 21:44:13,097 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [629910431] [2024-11-22 21:44:13,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 21:44:13,097 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 21:44:13,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 21:44:13,172 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-22 21:44:13,172 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 21:44:13,172 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [629910431] [2024-11-22 21:44:13,172 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [629910431] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-22 21:44:13,173 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-22 21:44:13,173 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-22 21:44:13,173 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1910382202] [2024-11-22 21:44:13,173 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-22 21:44:13,173 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-22 21:44:13,175 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 21:44:13,176 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-22 21:44:13,176 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-22 21:44:13,207 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 46 out of 96 [2024-11-22 21:44:13,208 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 98 places, 117 transitions, 443 flow. Second operand has 5 states, 5 states have (on average 48.0) internal successors, (240), 5 states have internal predecessors, (240), 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) [2024-11-22 21:44:13,208 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 21:44:13,208 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 46 of 96 [2024-11-22 21:44:13,208 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-22 21:44:14,022 INFO L124 PetriNetUnfolderBase]: 9500/17109 cut-off events. [2024-11-22 21:44:14,022 INFO L125 PetriNetUnfolderBase]: For 1749/1749 co-relation queries the response was YES. [2024-11-22 21:44:14,050 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31679 conditions, 17109 events. 9500/17109 cut-off events. For 1749/1749 co-relation queries the response was YES. Maximal size of possible extension queue 1006. Compared 142463 event pairs, 5298 based on Foata normal form. 114/12620 useless extension candidates. Maximal degree in co-relation 22707. Up to 6942 conditions per place. [2024-11-22 21:44:14,159 INFO L140 encePairwiseOnDemand]: 90/96 looper letters, 145 selfloop transitions, 10 changer transitions 0/191 dead transitions. [2024-11-22 21:44:14,159 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 102 places, 191 transitions, 983 flow [2024-11-22 21:44:14,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-22 21:44:14,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-22 21:44:14,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 342 transitions. [2024-11-22 21:44:14,161 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.7125 [2024-11-22 21:44:14,161 INFO L175 Difference]: Start difference. First operand has 98 places, 117 transitions, 443 flow. Second operand 5 states and 342 transitions. [2024-11-22 21:44:14,161 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 102 places, 191 transitions, 983 flow [2024-11-22 21:44:14,164 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 101 places, 191 transitions, 979 flow, removed 1 selfloop flow, removed 1 redundant places. [2024-11-22 21:44:14,166 INFO L231 Difference]: Finished difference. Result has 103 places, 121 transitions, 498 flow [2024-11-22 21:44:14,166 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=96, PETRI_DIFFERENCE_MINUEND_FLOW=439, PETRI_DIFFERENCE_MINUEND_PLACES=97, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=117, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=107, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=498, PETRI_PLACES=103, PETRI_TRANSITIONS=121} [2024-11-22 21:44:14,167 INFO L277 CegarLoopForPetriNet]: 90 programPoint places, 13 predicate places. [2024-11-22 21:44:14,167 INFO L471 AbstractCegarLoop]: Abstraction has has 103 places, 121 transitions, 498 flow [2024-11-22 21:44:14,167 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 48.0) internal successors, (240), 5 states have internal predecessors, (240), 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) [2024-11-22 21:44:14,167 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 21:44:14,167 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 21:44:14,167 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-11-22 21:44:14,167 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2024-11-22 21:44:14,168 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 21:44:14,168 INFO L85 PathProgramCache]: Analyzing trace with hash 1193415617, now seen corresponding path program 1 times [2024-11-22 21:44:14,168 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 21:44:14,168 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1727616461] [2024-11-22 21:44:14,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 21:44:14,168 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 21:44:14,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 21:44:14,221 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-22 21:44:14,222 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 21:44:14,222 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1727616461] [2024-11-22 21:44:14,222 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1727616461] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-22 21:44:14,222 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-22 21:44:14,223 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-22 21:44:14,223 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1651508522] [2024-11-22 21:44:14,223 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-22 21:44:14,224 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-22 21:44:14,224 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 21:44:14,224 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-22 21:44:14,224 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-22 21:44:14,245 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 46 out of 96 [2024-11-22 21:44:14,246 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 103 places, 121 transitions, 498 flow. Second operand has 5 states, 5 states have (on average 48.0) internal successors, (240), 5 states have internal predecessors, (240), 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) [2024-11-22 21:44:14,246 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 21:44:14,246 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 46 of 96 [2024-11-22 21:44:14,246 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-22 21:44:15,104 INFO L124 PetriNetUnfolderBase]: 8828/16221 cut-off events. [2024-11-22 21:44:15,104 INFO L125 PetriNetUnfolderBase]: For 5585/5585 co-relation queries the response was YES. [2024-11-22 21:44:15,129 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31239 conditions, 16221 events. 8828/16221 cut-off events. For 5585/5585 co-relation queries the response was YES. Maximal size of possible extension queue 871. Compared 134802 event pairs, 5194 based on Foata normal form. 0/11714 useless extension candidates. Maximal degree in co-relation 23054. Up to 7338 conditions per place. [2024-11-22 21:44:15,179 INFO L140 encePairwiseOnDemand]: 90/96 looper letters, 142 selfloop transitions, 8 changer transitions 0/186 dead transitions. [2024-11-22 21:44:15,180 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 107 places, 186 transitions, 1026 flow [2024-11-22 21:44:15,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-22 21:44:15,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-22 21:44:15,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 335 transitions. [2024-11-22 21:44:15,182 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6979166666666666 [2024-11-22 21:44:15,182 INFO L175 Difference]: Start difference. First operand has 103 places, 121 transitions, 498 flow. Second operand 5 states and 335 transitions. [2024-11-22 21:44:15,182 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 107 places, 186 transitions, 1026 flow [2024-11-22 21:44:15,188 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 105 places, 186 transitions, 1015 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-22 21:44:15,189 INFO L231 Difference]: Finished difference. Result has 107 places, 123 transitions, 518 flow [2024-11-22 21:44:15,190 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=96, PETRI_DIFFERENCE_MINUEND_FLOW=487, PETRI_DIFFERENCE_MINUEND_PLACES=101, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=121, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=113, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=518, PETRI_PLACES=107, PETRI_TRANSITIONS=123} [2024-11-22 21:44:15,191 INFO L277 CegarLoopForPetriNet]: 90 programPoint places, 17 predicate places. [2024-11-22 21:44:15,192 INFO L471 AbstractCegarLoop]: Abstraction has has 107 places, 123 transitions, 518 flow [2024-11-22 21:44:15,192 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 48.0) internal successors, (240), 5 states have internal predecessors, (240), 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) [2024-11-22 21:44:15,192 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 21:44:15,193 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 21:44:15,193 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-11-22 21:44:15,193 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting thread3Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2024-11-22 21:44:15,194 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 21:44:15,194 INFO L85 PathProgramCache]: Analyzing trace with hash 1303113116, now seen corresponding path program 1 times [2024-11-22 21:44:15,194 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 21:44:15,194 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1817834698] [2024-11-22 21:44:15,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 21:44:15,195 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 21:44:15,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 21:44:15,255 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-22 21:44:15,256 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 21:44:15,256 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1817834698] [2024-11-22 21:44:15,256 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1817834698] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-22 21:44:15,256 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-22 21:44:15,256 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-22 21:44:15,256 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1628716586] [2024-11-22 21:44:15,257 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-22 21:44:15,257 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-22 21:44:15,257 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 21:44:15,258 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-22 21:44:15,258 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-22 21:44:15,283 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 46 out of 96 [2024-11-22 21:44:15,283 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 107 places, 123 transitions, 518 flow. Second operand has 5 states, 5 states have (on average 48.4) internal successors, (242), 5 states have internal predecessors, (242), 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) [2024-11-22 21:44:15,283 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 21:44:15,283 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 46 of 96 [2024-11-22 21:44:15,283 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-22 21:44:16,065 INFO L124 PetriNetUnfolderBase]: 7930/14288 cut-off events. [2024-11-22 21:44:16,065 INFO L125 PetriNetUnfolderBase]: For 6576/6576 co-relation queries the response was YES. [2024-11-22 21:44:16,087 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29363 conditions, 14288 events. 7930/14288 cut-off events. For 6576/6576 co-relation queries the response was YES. Maximal size of possible extension queue 704. Compared 111809 event pairs, 4896 based on Foata normal form. 0/10888 useless extension candidates. Maximal degree in co-relation 21587. Up to 6601 conditions per place. [2024-11-22 21:44:16,127 INFO L140 encePairwiseOnDemand]: 84/96 looper letters, 127 selfloop transitions, 18 changer transitions 0/181 dead transitions. [2024-11-22 21:44:16,127 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 112 places, 181 transitions, 999 flow [2024-11-22 21:44:16,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-22 21:44:16,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-22 21:44:16,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 387 transitions. [2024-11-22 21:44:16,128 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.671875 [2024-11-22 21:44:16,128 INFO L175 Difference]: Start difference. First operand has 107 places, 123 transitions, 518 flow. Second operand 6 states and 387 transitions. [2024-11-22 21:44:16,128 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 112 places, 181 transitions, 999 flow [2024-11-22 21:44:16,138 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 110 places, 181 transitions, 987 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-22 21:44:16,139 INFO L231 Difference]: Finished difference. Result has 112 places, 125 transitions, 570 flow [2024-11-22 21:44:16,140 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=96, PETRI_DIFFERENCE_MINUEND_FLOW=507, PETRI_DIFFERENCE_MINUEND_PLACES=105, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=123, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=105, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=570, PETRI_PLACES=112, PETRI_TRANSITIONS=125} [2024-11-22 21:44:16,141 INFO L277 CegarLoopForPetriNet]: 90 programPoint places, 22 predicate places. [2024-11-22 21:44:16,141 INFO L471 AbstractCegarLoop]: Abstraction has has 112 places, 125 transitions, 570 flow [2024-11-22 21:44:16,141 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 48.4) internal successors, (242), 5 states have internal predecessors, (242), 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) [2024-11-22 21:44:16,141 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 21:44:16,141 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 21:44:16,141 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-11-22 21:44:16,141 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2024-11-22 21:44:16,142 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 21:44:16,143 INFO L85 PathProgramCache]: Analyzing trace with hash 1331590473, now seen corresponding path program 1 times [2024-11-22 21:44:16,143 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 21:44:16,143 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1830003433] [2024-11-22 21:44:16,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 21:44:16,143 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 21:44:16,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 21:44:16,211 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-22 21:44:16,211 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 21:44:16,212 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1830003433] [2024-11-22 21:44:16,212 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1830003433] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-22 21:44:16,212 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-22 21:44:16,212 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-22 21:44:16,212 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [284823181] [2024-11-22 21:44:16,212 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-22 21:44:16,212 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-22 21:44:16,212 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 21:44:16,212 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-22 21:44:16,213 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-22 21:44:16,237 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 46 out of 96 [2024-11-22 21:44:16,237 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 112 places, 125 transitions, 570 flow. Second operand has 5 states, 5 states have (on average 48.4) internal successors, (242), 5 states have internal predecessors, (242), 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) [2024-11-22 21:44:16,237 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 21:44:16,237 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 46 of 96 [2024-11-22 21:44:16,237 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-22 21:44:17,776 INFO L124 PetriNetUnfolderBase]: 14398/25606 cut-off events. [2024-11-22 21:44:17,776 INFO L125 PetriNetUnfolderBase]: For 13531/13531 co-relation queries the response was YES. [2024-11-22 21:44:17,828 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55837 conditions, 25606 events. 14398/25606 cut-off events. For 13531/13531 co-relation queries the response was YES. Maximal size of possible extension queue 1125. Compared 215452 event pairs, 8752 based on Foata normal form. 209/21235 useless extension candidates. Maximal degree in co-relation 40013. Up to 10931 conditions per place. [2024-11-22 21:44:17,890 INFO L140 encePairwiseOnDemand]: 90/96 looper letters, 150 selfloop transitions, 13 changer transitions 0/199 dead transitions. [2024-11-22 21:44:17,891 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 116 places, 199 transitions, 1184 flow [2024-11-22 21:44:17,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-22 21:44:17,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-22 21:44:17,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 338 transitions. [2024-11-22 21:44:17,893 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.7041666666666667 [2024-11-22 21:44:17,894 INFO L175 Difference]: Start difference. First operand has 112 places, 125 transitions, 570 flow. Second operand 5 states and 338 transitions. [2024-11-22 21:44:17,894 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 116 places, 199 transitions, 1184 flow [2024-11-22 21:44:17,917 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 113 places, 199 transitions, 1165 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-11-22 21:44:17,919 INFO L231 Difference]: Finished difference. Result has 115 places, 129 transitions, 617 flow [2024-11-22 21:44:17,919 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=96, PETRI_DIFFERENCE_MINUEND_FLOW=551, PETRI_DIFFERENCE_MINUEND_PLACES=109, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=125, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=112, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=617, PETRI_PLACES=115, PETRI_TRANSITIONS=129} [2024-11-22 21:44:17,920 INFO L277 CegarLoopForPetriNet]: 90 programPoint places, 25 predicate places. [2024-11-22 21:44:17,920 INFO L471 AbstractCegarLoop]: Abstraction has has 115 places, 129 transitions, 617 flow [2024-11-22 21:44:17,920 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 48.4) internal successors, (242), 5 states have internal predecessors, (242), 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) [2024-11-22 21:44:17,920 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 21:44:17,920 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 21:44:17,920 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-11-22 21:44:17,921 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2024-11-22 21:44:17,921 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 21:44:17,921 INFO L85 PathProgramCache]: Analyzing trace with hash 2047314643, now seen corresponding path program 1 times [2024-11-22 21:44:17,921 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 21:44:17,922 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [261428642] [2024-11-22 21:44:17,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 21:44:17,922 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 21:44:17,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 21:44:18,144 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-22 21:44:18,145 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 21:44:18,145 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [261428642] [2024-11-22 21:44:18,145 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [261428642] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-22 21:44:18,145 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [779871806] [2024-11-22 21:44:18,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 21:44:18,145 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 21:44:18,145 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-22 21:44:18,146 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) [2024-11-22 21:44:18,148 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-22 21:44:18,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 21:44:18,213 INFO L255 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 20 conjuncts are in the unsatisfiable core [2024-11-22 21:44:18,214 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-22 21:44:18,223 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 6 treesize of output 5 [2024-11-22 21:44:18,263 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-22 21:44:18,265 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2024-11-22 21:44:18,286 INFO L349 Elim1Store]: treesize reduction 20, result has 33.3 percent of original size [2024-11-22 21:44:18,286 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 16 [2024-11-22 21:44:18,316 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-22 21:44:18,316 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2024-11-22 21:44:18,328 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-22 21:44:18,328 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2024-11-22 21:44:18,367 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-22 21:44:18,367 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-22 21:44:18,540 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 100 treesize of output 96 [2024-11-22 21:44:18,679 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-22 21:44:18,680 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [779871806] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-22 21:44:18,680 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-22 21:44:18,680 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 14 [2024-11-22 21:44:18,680 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1581784929] [2024-11-22 21:44:18,680 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-22 21:44:18,680 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-11-22 21:44:18,681 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 21:44:18,681 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-11-22 21:44:18,681 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2024-11-22 21:44:19,828 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 34 out of 96 [2024-11-22 21:44:19,828 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 115 places, 129 transitions, 617 flow. Second operand has 16 states, 16 states have (on average 36.0625) internal successors, (577), 16 states have internal predecessors, (577), 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) [2024-11-22 21:44:19,828 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 21:44:19,828 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 34 of 96 [2024-11-22 21:44:19,829 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-22 21:44:22,512 INFO L124 PetriNetUnfolderBase]: 22860/38327 cut-off events. [2024-11-22 21:44:22,512 INFO L125 PetriNetUnfolderBase]: For 25611/25611 co-relation queries the response was YES. [2024-11-22 21:44:22,622 INFO L83 FinitePrefix]: Finished finitePrefix Result has 87177 conditions, 38327 events. 22860/38327 cut-off events. For 25611/25611 co-relation queries the response was YES. Maximal size of possible extension queue 1285. Compared 310589 event pairs, 10483 based on Foata normal form. 0/32667 useless extension candidates. Maximal degree in co-relation 63478. Up to 12148 conditions per place. [2024-11-22 21:44:22,739 INFO L140 encePairwiseOnDemand]: 79/96 looper letters, 175 selfloop transitions, 26 changer transitions 0/228 dead transitions. [2024-11-22 21:44:22,739 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 118 places, 228 transitions, 1375 flow [2024-11-22 21:44:22,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-22 21:44:22,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-11-22 21:44:22,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 481 transitions. [2024-11-22 21:44:22,740 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5567129629629629 [2024-11-22 21:44:22,741 INFO L175 Difference]: Start difference. First operand has 115 places, 129 transitions, 617 flow. Second operand 9 states and 481 transitions. [2024-11-22 21:44:22,741 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 118 places, 228 transitions, 1375 flow [2024-11-22 21:44:22,802 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 117 places, 228 transitions, 1367 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-22 21:44:22,804 INFO L231 Difference]: Finished difference. Result has 119 places, 130 transitions, 696 flow [2024-11-22 21:44:22,804 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=96, PETRI_DIFFERENCE_MINUEND_FLOW=600, PETRI_DIFFERENCE_MINUEND_PLACES=109, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=124, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=102, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=696, PETRI_PLACES=119, PETRI_TRANSITIONS=130} [2024-11-22 21:44:22,804 INFO L277 CegarLoopForPetriNet]: 90 programPoint places, 29 predicate places. [2024-11-22 21:44:22,804 INFO L471 AbstractCegarLoop]: Abstraction has has 119 places, 130 transitions, 696 flow [2024-11-22 21:44:22,805 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 36.0625) internal successors, (577), 16 states have internal predecessors, (577), 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) [2024-11-22 21:44:22,805 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 21:44:22,805 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 21:44:22,811 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-11-22 21:44:23,005 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 21:44:23,006 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2024-11-22 21:44:23,006 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 21:44:23,006 INFO L85 PathProgramCache]: Analyzing trace with hash -957754760, now seen corresponding path program 1 times [2024-11-22 21:44:23,006 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 21:44:23,006 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1691033526] [2024-11-22 21:44:23,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 21:44:23,006 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 21:44:23,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 21:44:23,155 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-22 21:44:23,156 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 21:44:23,156 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1691033526] [2024-11-22 21:44:23,156 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1691033526] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-22 21:44:23,156 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1736095448] [2024-11-22 21:44:23,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 21:44:23,156 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 21:44:23,156 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-22 21:44:23,158 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) [2024-11-22 21:44:23,159 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-22 21:44:23,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 21:44:23,219 INFO L255 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 16 conjuncts are in the unsatisfiable core [2024-11-22 21:44:23,220 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-22 21:44:23,226 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 6 treesize of output 5 [2024-11-22 21:44:23,260 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-22 21:44:23,261 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2024-11-22 21:44:23,266 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-22 21:44:23,266 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2024-11-22 21:44:23,302 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-22 21:44:23,302 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-22 21:44:23,380 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 52 treesize of output 48 [2024-11-22 21:44:23,568 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-22 21:44:23,568 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1736095448] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-22 21:44:23,568 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-22 21:44:23,568 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 12 [2024-11-22 21:44:23,568 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [967253937] [2024-11-22 21:44:23,568 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-22 21:44:23,569 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-11-22 21:44:23,569 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 21:44:23,569 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-11-22 21:44:23,569 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2024-11-22 21:44:27,630 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-22 21:44:31,671 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-22 21:44:35,741 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-22 21:44:39,877 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-22 21:44:43,902 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-22 21:44:47,952 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-22 21:44:52,016 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-22 21:44:56,731 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-22 21:45:00,761 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-22 21:45:01,797 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 32 out of 96 [2024-11-22 21:45:01,797 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 119 places, 130 transitions, 696 flow. Second operand has 13 states, 13 states have (on average 34.07692307692308) internal successors, (443), 13 states have internal predecessors, (443), 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) [2024-11-22 21:45:01,797 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 21:45:01,797 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 32 of 96 [2024-11-22 21:45:01,797 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-22 21:45:04,201 INFO L124 PetriNetUnfolderBase]: 26866/41289 cut-off events. [2024-11-22 21:45:04,201 INFO L125 PetriNetUnfolderBase]: For 38268/38268 co-relation queries the response was YES. [2024-11-22 21:45:04,284 INFO L83 FinitePrefix]: Finished finitePrefix Result has 100941 conditions, 41289 events. 26866/41289 cut-off events. For 38268/38268 co-relation queries the response was YES. Maximal size of possible extension queue 1297. Compared 299646 event pairs, 12326 based on Foata normal form. 0/35581 useless extension candidates. Maximal degree in co-relation 69232. Up to 13897 conditions per place. [2024-11-22 21:45:04,393 INFO L140 encePairwiseOnDemand]: 83/96 looper letters, 185 selfloop transitions, 34 changer transitions 0/243 dead transitions. [2024-11-22 21:45:04,393 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 126 places, 243 transitions, 1541 flow [2024-11-22 21:45:04,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-22 21:45:04,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-11-22 21:45:04,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 457 transitions. [2024-11-22 21:45:04,395 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5289351851851852 [2024-11-22 21:45:04,395 INFO L175 Difference]: Start difference. First operand has 119 places, 130 transitions, 696 flow. Second operand 9 states and 457 transitions. [2024-11-22 21:45:04,395 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 126 places, 243 transitions, 1541 flow [2024-11-22 21:45:04,473 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 125 places, 243 transitions, 1516 flow, removed 9 selfloop flow, removed 1 redundant places. [2024-11-22 21:45:04,475 INFO L231 Difference]: Finished difference. Result has 127 places, 138 transitions, 831 flow [2024-11-22 21:45:04,475 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=96, PETRI_DIFFERENCE_MINUEND_FLOW=676, PETRI_DIFFERENCE_MINUEND_PLACES=117, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=129, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=103, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=831, PETRI_PLACES=127, PETRI_TRANSITIONS=138} [2024-11-22 21:45:04,475 INFO L277 CegarLoopForPetriNet]: 90 programPoint places, 37 predicate places. [2024-11-22 21:45:04,475 INFO L471 AbstractCegarLoop]: Abstraction has has 127 places, 138 transitions, 831 flow [2024-11-22 21:45:04,476 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 34.07692307692308) internal successors, (443), 13 states have internal predecessors, (443), 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) [2024-11-22 21:45:04,476 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 21:45:04,476 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 21:45:04,483 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-11-22 21:45:04,676 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 21:45:04,677 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2024-11-22 21:45:04,677 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 21:45:04,677 INFO L85 PathProgramCache]: Analyzing trace with hash -957754761, now seen corresponding path program 1 times [2024-11-22 21:45:04,677 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 21:45:04,677 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1819953812] [2024-11-22 21:45:04,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 21:45:04,677 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 21:45:04,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 21:45:04,741 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-22 21:45:04,741 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 21:45:04,741 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1819953812] [2024-11-22 21:45:04,741 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1819953812] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-22 21:45:04,741 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-22 21:45:04,741 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-22 21:45:04,741 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1463860625] [2024-11-22 21:45:04,742 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-22 21:45:04,742 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-22 21:45:04,742 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 21:45:04,742 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-22 21:45:04,742 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-22 21:45:04,782 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 37 out of 96 [2024-11-22 21:45:04,783 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 127 places, 138 transitions, 831 flow. Second operand has 4 states, 4 states have (on average 40.0) internal successors, (160), 4 states have internal predecessors, (160), 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) [2024-11-22 21:45:04,783 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 21:45:04,783 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 37 of 96 [2024-11-22 21:45:04,783 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-22 21:45:06,559 INFO L124 PetriNetUnfolderBase]: 19537/32776 cut-off events. [2024-11-22 21:45:06,559 INFO L125 PetriNetUnfolderBase]: For 41610/41610 co-relation queries the response was YES. [2024-11-22 21:45:06,668 INFO L83 FinitePrefix]: Finished finitePrefix Result has 82045 conditions, 32776 events. 19537/32776 cut-off events. For 41610/41610 co-relation queries the response was YES. Maximal size of possible extension queue 1183. Compared 259645 event pairs, 14065 based on Foata normal form. 394/29828 useless extension candidates. Maximal degree in co-relation 59786. Up to 26618 conditions per place. [2024-11-22 21:45:06,771 INFO L140 encePairwiseOnDemand]: 89/96 looper letters, 91 selfloop transitions, 18 changer transitions 0/134 dead transitions. [2024-11-22 21:45:06,771 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 127 places, 134 transitions, 1041 flow [2024-11-22 21:45:06,771 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-22 21:45:06,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-22 21:45:06,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 239 transitions. [2024-11-22 21:45:06,772 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4979166666666667 [2024-11-22 21:45:06,772 INFO L175 Difference]: Start difference. First operand has 127 places, 138 transitions, 831 flow. Second operand 5 states and 239 transitions. [2024-11-22 21:45:06,772 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 127 places, 134 transitions, 1041 flow [2024-11-22 21:45:06,930 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 124 places, 134 transitions, 1022 flow, removed 2 selfloop flow, removed 3 redundant places. [2024-11-22 21:45:06,935 INFO L231 Difference]: Finished difference. Result has 124 places, 134 transitions, 840 flow [2024-11-22 21:45:06,936 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=96, PETRI_DIFFERENCE_MINUEND_FLOW=804, PETRI_DIFFERENCE_MINUEND_PLACES=120, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=134, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=116, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=840, PETRI_PLACES=124, PETRI_TRANSITIONS=134} [2024-11-22 21:45:06,936 INFO L277 CegarLoopForPetriNet]: 90 programPoint places, 34 predicate places. [2024-11-22 21:45:06,936 INFO L471 AbstractCegarLoop]: Abstraction has has 124 places, 134 transitions, 840 flow [2024-11-22 21:45:06,937 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 40.0) internal successors, (160), 4 states have internal predecessors, (160), 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) [2024-11-22 21:45:06,937 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 21:45:06,937 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 21:45:06,937 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-11-22 21:45:06,937 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2024-11-22 21:45:06,938 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 21:45:06,938 INFO L85 PathProgramCache]: Analyzing trace with hash -884634317, now seen corresponding path program 1 times [2024-11-22 21:45:06,938 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 21:45:06,938 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [156468153] [2024-11-22 21:45:06,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 21:45:06,939 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 21:45:06,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 21:45:06,993 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-22 21:45:06,994 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 21:45:06,994 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [156468153] [2024-11-22 21:45:06,994 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [156468153] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-22 21:45:06,994 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-22 21:45:06,994 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-22 21:45:06,994 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [770148348] [2024-11-22 21:45:06,994 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-22 21:45:06,995 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-22 21:45:06,995 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 21:45:06,995 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-22 21:45:06,995 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-22 21:45:07,020 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 46 out of 96 [2024-11-22 21:45:07,020 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 124 places, 134 transitions, 840 flow. Second operand has 5 states, 5 states have (on average 48.8) internal successors, (244), 5 states have internal predecessors, (244), 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) [2024-11-22 21:45:07,021 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 21:45:07,021 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 46 of 96 [2024-11-22 21:45:07,021 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-22 21:45:08,409 INFO L124 PetriNetUnfolderBase]: 16312/26016 cut-off events. [2024-11-22 21:45:08,409 INFO L125 PetriNetUnfolderBase]: For 34090/34240 co-relation queries the response was YES. [2024-11-22 21:45:08,475 INFO L83 FinitePrefix]: Finished finitePrefix Result has 66662 conditions, 26016 events. 16312/26016 cut-off events. For 34090/34240 co-relation queries the response was YES. Maximal size of possible extension queue 848. Compared 184039 event pairs, 10256 based on Foata normal form. 218/23300 useless extension candidates. Maximal degree in co-relation 49127. Up to 13117 conditions per place. [2024-11-22 21:45:08,542 INFO L140 encePairwiseOnDemand]: 90/96 looper letters, 158 selfloop transitions, 17 changer transitions 0/203 dead transitions. [2024-11-22 21:45:08,543 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 128 places, 203 transitions, 1560 flow [2024-11-22 21:45:08,543 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-22 21:45:08,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-22 21:45:08,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 331 transitions. [2024-11-22 21:45:08,544 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6895833333333333 [2024-11-22 21:45:08,544 INFO L175 Difference]: Start difference. First operand has 124 places, 134 transitions, 840 flow. Second operand 5 states and 331 transitions. [2024-11-22 21:45:08,544 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 128 places, 203 transitions, 1560 flow [2024-11-22 21:45:08,568 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 125 places, 203 transitions, 1536 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-11-22 21:45:08,570 INFO L231 Difference]: Finished difference. Result has 127 places, 138 transitions, 892 flow [2024-11-22 21:45:08,570 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=96, PETRI_DIFFERENCE_MINUEND_FLOW=816, PETRI_DIFFERENCE_MINUEND_PLACES=121, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=134, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=117, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=892, PETRI_PLACES=127, PETRI_TRANSITIONS=138} [2024-11-22 21:45:08,570 INFO L277 CegarLoopForPetriNet]: 90 programPoint places, 37 predicate places. [2024-11-22 21:45:08,570 INFO L471 AbstractCegarLoop]: Abstraction has has 127 places, 138 transitions, 892 flow [2024-11-22 21:45:08,570 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 48.8) internal successors, (244), 5 states have internal predecessors, (244), 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) [2024-11-22 21:45:08,571 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 21:45:08,571 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 21:45:08,571 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-11-22 21:45:08,571 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2024-11-22 21:45:08,571 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 21:45:08,571 INFO L85 PathProgramCache]: Analyzing trace with hash 932459081, now seen corresponding path program 1 times [2024-11-22 21:45:08,571 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 21:45:08,571 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [771107008] [2024-11-22 21:45:08,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 21:45:08,572 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 21:45:08,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 21:45:08,712 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-22 21:45:08,713 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 21:45:08,713 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [771107008] [2024-11-22 21:45:08,713 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [771107008] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-22 21:45:08,713 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1657955191] [2024-11-22 21:45:08,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 21:45:08,713 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 21:45:08,713 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-22 21:45:08,715 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) [2024-11-22 21:45:08,716 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-22 21:45:08,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 21:45:08,778 INFO L255 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 16 conjuncts are in the unsatisfiable core [2024-11-22 21:45:08,780 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-22 21:45:08,785 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 6 treesize of output 5 [2024-11-22 21:45:08,819 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-22 21:45:08,820 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2024-11-22 21:45:08,825 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-22 21:45:08,825 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2024-11-22 21:45:08,879 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-22 21:45:08,879 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-22 21:45:08,969 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 52 treesize of output 48 [2024-11-22 21:45:09,015 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-22 21:45:09,015 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1657955191] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-22 21:45:09,015 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-22 21:45:09,015 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 12 [2024-11-22 21:45:09,015 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1651471931] [2024-11-22 21:45:09,015 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-22 21:45:09,015 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-11-22 21:45:09,016 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 21:45:09,016 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-11-22 21:45:09,016 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2024-11-22 21:45:09,597 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 40 out of 96 [2024-11-22 21:45:09,597 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 127 places, 138 transitions, 892 flow. Second operand has 13 states, 13 states have (on average 42.53846153846154) internal successors, (553), 13 states have internal predecessors, (553), 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) [2024-11-22 21:45:09,597 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 21:45:09,597 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 40 of 96 [2024-11-22 21:45:09,597 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-22 21:45:12,019 INFO L124 PetriNetUnfolderBase]: 23084/36815 cut-off events. [2024-11-22 21:45:12,019 INFO L125 PetriNetUnfolderBase]: For 56291/57119 co-relation queries the response was YES. [2024-11-22 21:45:12,134 INFO L83 FinitePrefix]: Finished finitePrefix Result has 95456 conditions, 36815 events. 23084/36815 cut-off events. For 56291/57119 co-relation queries the response was YES. Maximal size of possible extension queue 1098. Compared 272982 event pairs, 10273 based on Foata normal form. 0/32477 useless extension candidates. Maximal degree in co-relation 72308. Up to 11967 conditions per place. [2024-11-22 21:45:12,235 INFO L140 encePairwiseOnDemand]: 83/96 looper letters, 190 selfloop transitions, 34 changer transitions 0/249 dead transitions. [2024-11-22 21:45:12,235 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 134 places, 249 transitions, 1870 flow [2024-11-22 21:45:12,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-22 21:45:12,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-11-22 21:45:12,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 511 transitions. [2024-11-22 21:45:12,236 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5914351851851852 [2024-11-22 21:45:12,236 INFO L175 Difference]: Start difference. First operand has 127 places, 138 transitions, 892 flow. Second operand 9 states and 511 transitions. [2024-11-22 21:45:12,236 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 134 places, 249 transitions, 1870 flow [2024-11-22 21:45:12,285 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 132 places, 249 transitions, 1848 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-22 21:45:12,288 INFO L231 Difference]: Finished difference. Result has 134 places, 141 transitions, 977 flow [2024-11-22 21:45:12,288 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=96, PETRI_DIFFERENCE_MINUEND_FLOW=868, PETRI_DIFFERENCE_MINUEND_PLACES=124, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=137, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=105, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=977, PETRI_PLACES=134, PETRI_TRANSITIONS=141} [2024-11-22 21:45:12,288 INFO L277 CegarLoopForPetriNet]: 90 programPoint places, 44 predicate places. [2024-11-22 21:45:12,288 INFO L471 AbstractCegarLoop]: Abstraction has has 134 places, 141 transitions, 977 flow [2024-11-22 21:45:12,289 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 42.53846153846154) internal successors, (553), 13 states have internal predecessors, (553), 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) [2024-11-22 21:45:12,289 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 21:45:12,289 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 21:45:12,296 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2024-11-22 21:45:12,489 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2024-11-22 21:45:12,490 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting thread2Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2024-11-22 21:45:12,490 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 21:45:12,490 INFO L85 PathProgramCache]: Analyzing trace with hash -1158538794, now seen corresponding path program 1 times [2024-11-22 21:45:12,490 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 21:45:12,490 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [811038698] [2024-11-22 21:45:12,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 21:45:12,490 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 21:45:12,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 21:45:12,538 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-22 21:45:12,539 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 21:45:12,539 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [811038698] [2024-11-22 21:45:12,539 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [811038698] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-22 21:45:12,539 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-22 21:45:12,539 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-22 21:45:12,539 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [921438397] [2024-11-22 21:45:12,539 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-22 21:45:12,540 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-22 21:45:12,541 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 21:45:12,541 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-22 21:45:12,541 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-22 21:45:12,732 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 38 out of 96 [2024-11-22 21:45:12,733 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 134 places, 141 transitions, 977 flow. Second operand has 4 states, 4 states have (on average 41.5) internal successors, (166), 4 states have internal predecessors, (166), 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) [2024-11-22 21:45:12,733 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 21:45:12,733 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 38 of 96 [2024-11-22 21:45:12,733 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-22 21:45:15,049 INFO L124 PetriNetUnfolderBase]: 21908/35193 cut-off events. [2024-11-22 21:45:15,049 INFO L125 PetriNetUnfolderBase]: For 62512/62992 co-relation queries the response was YES. [2024-11-22 21:45:15,149 INFO L83 FinitePrefix]: Finished finitePrefix Result has 96540 conditions, 35193 events. 21908/35193 cut-off events. For 62512/62992 co-relation queries the response was YES. Maximal size of possible extension queue 961. Compared 258452 event pairs, 15768 based on Foata normal form. 0/33519 useless extension candidates. Maximal degree in co-relation 70186. Up to 29754 conditions per place. [2024-11-22 21:45:15,247 INFO L140 encePairwiseOnDemand]: 90/96 looper letters, 101 selfloop transitions, 13 changer transitions 0/137 dead transitions. [2024-11-22 21:45:15,247 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 133 places, 137 transitions, 1197 flow [2024-11-22 21:45:15,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-22 21:45:15,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-22 21:45:15,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 205 transitions. [2024-11-22 21:45:15,248 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5338541666666666 [2024-11-22 21:45:15,248 INFO L175 Difference]: Start difference. First operand has 134 places, 141 transitions, 977 flow. Second operand 4 states and 205 transitions. [2024-11-22 21:45:15,249 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 133 places, 137 transitions, 1197 flow [2024-11-22 21:45:15,296 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 127 places, 137 transitions, 1138 flow, removed 4 selfloop flow, removed 6 redundant places. [2024-11-22 21:45:15,298 INFO L231 Difference]: Finished difference. Result has 127 places, 137 transitions, 936 flow [2024-11-22 21:45:15,298 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=96, PETRI_DIFFERENCE_MINUEND_FLOW=910, PETRI_DIFFERENCE_MINUEND_PLACES=124, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=137, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=124, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=936, PETRI_PLACES=127, PETRI_TRANSITIONS=137} [2024-11-22 21:45:15,299 INFO L277 CegarLoopForPetriNet]: 90 programPoint places, 37 predicate places. [2024-11-22 21:45:15,299 INFO L471 AbstractCegarLoop]: Abstraction has has 127 places, 137 transitions, 936 flow [2024-11-22 21:45:15,299 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 41.5) internal successors, (166), 4 states have internal predecessors, (166), 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) [2024-11-22 21:45:15,299 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 21:45:15,299 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 21:45:15,299 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-11-22 21:45:15,299 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2024-11-22 21:45:15,300 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 21:45:15,300 INFO L85 PathProgramCache]: Analyzing trace with hash -1158538793, now seen corresponding path program 1 times [2024-11-22 21:45:15,300 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 21:45:15,300 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [147897385] [2024-11-22 21:45:15,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 21:45:15,300 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 21:45:15,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 21:45:15,413 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-22 21:45:15,414 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 21:45:15,414 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [147897385] [2024-11-22 21:45:15,414 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [147897385] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-22 21:45:15,414 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1242438715] [2024-11-22 21:45:15,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 21:45:15,414 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 21:45:15,414 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-22 21:45:15,416 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) [2024-11-22 21:45:15,417 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-22 21:45:15,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 21:45:15,483 INFO L255 TraceCheckSpWp]: Trace formula consists of 202 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-11-22 21:45:15,485 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-22 21:45:15,537 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-22 21:45:15,537 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-22 21:45:15,568 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 [2024-11-22 21:45:15,572 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-22 21:45:15,573 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1242438715] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-22 21:45:15,573 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-22 21:45:15,573 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2024-11-22 21:45:15,573 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1808653721] [2024-11-22 21:45:15,573 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-22 21:45:15,573 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-11-22 21:45:15,573 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 21:45:15,573 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-11-22 21:45:15,573 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2024-11-22 21:45:15,886 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 44 out of 96 [2024-11-22 21:45:15,887 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 127 places, 137 transitions, 936 flow. Second operand has 11 states, 11 states have (on average 46.36363636363637) internal successors, (510), 11 states have internal predecessors, (510), 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) [2024-11-22 21:45:15,887 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 21:45:15,887 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 44 of 96 [2024-11-22 21:45:15,887 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-22 21:45:18,298 INFO L124 PetriNetUnfolderBase]: 21546/32704 cut-off events. [2024-11-22 21:45:18,298 INFO L125 PetriNetUnfolderBase]: For 55818/56286 co-relation queries the response was YES. [2024-11-22 21:45:18,388 INFO L83 FinitePrefix]: Finished finitePrefix Result has 90935 conditions, 32704 events. 21546/32704 cut-off events. For 55818/56286 co-relation queries the response was YES. Maximal size of possible extension queue 857. Compared 220019 event pairs, 10533 based on Foata normal form. 0/30795 useless extension candidates. Maximal degree in co-relation 69361. Up to 11045 conditions per place. [2024-11-22 21:45:18,476 INFO L140 encePairwiseOnDemand]: 83/96 looper letters, 182 selfloop transitions, 34 changer transitions 0/238 dead transitions. [2024-11-22 21:45:18,476 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 132 places, 238 transitions, 1866 flow [2024-11-22 21:45:18,477 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-22 21:45:18,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-11-22 21:45:18,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 451 transitions. [2024-11-22 21:45:18,478 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6711309523809523 [2024-11-22 21:45:18,478 INFO L175 Difference]: Start difference. First operand has 127 places, 137 transitions, 936 flow. Second operand 7 states and 451 transitions. [2024-11-22 21:45:18,478 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 132 places, 238 transitions, 1866 flow [2024-11-22 21:45:18,517 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 130 places, 238 transitions, 1852 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-22 21:45:18,519 INFO L231 Difference]: Finished difference. Result has 132 places, 137 transitions, 1015 flow [2024-11-22 21:45:18,519 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=96, PETRI_DIFFERENCE_MINUEND_FLOW=920, PETRI_DIFFERENCE_MINUEND_PLACES=124, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=136, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=102, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1015, PETRI_PLACES=132, PETRI_TRANSITIONS=137} [2024-11-22 21:45:18,519 INFO L277 CegarLoopForPetriNet]: 90 programPoint places, 42 predicate places. [2024-11-22 21:45:18,519 INFO L471 AbstractCegarLoop]: Abstraction has has 132 places, 137 transitions, 1015 flow [2024-11-22 21:45:18,519 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 46.36363636363637) internal successors, (510), 11 states have internal predecessors, (510), 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) [2024-11-22 21:45:18,520 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 21:45:18,520 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 21:45:18,532 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-11-22 21:45:18,720 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2024-11-22 21:45:18,720 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2024-11-22 21:45:18,721 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 21:45:18,721 INFO L85 PathProgramCache]: Analyzing trace with hash -1003562407, now seen corresponding path program 1 times [2024-11-22 21:45:18,721 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 21:45:18,721 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1339916402] [2024-11-22 21:45:18,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 21:45:18,721 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 21:45:18,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 21:45:18,794 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-22 21:45:18,794 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 21:45:18,794 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1339916402] [2024-11-22 21:45:18,794 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1339916402] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-22 21:45:18,794 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [512900530] [2024-11-22 21:45:18,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 21:45:18,794 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 21:45:18,794 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-22 21:45:18,795 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) [2024-11-22 21:45:18,797 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-11-22 21:45:18,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 21:45:18,859 INFO L255 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-22 21:45:18,859 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-22 21:45:18,918 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-22 21:45:18,918 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-22 21:45:19,138 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-22 21:45:19,138 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [512900530] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-22 21:45:19,138 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-22 21:45:19,138 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 7] total 16 [2024-11-22 21:45:19,138 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1236956131] [2024-11-22 21:45:19,138 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-22 21:45:19,138 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-11-22 21:45:19,139 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 21:45:19,139 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-11-22 21:45:19,139 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=191, Unknown=0, NotChecked=0, Total=240 [2024-11-22 21:45:19,311 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 46 out of 96 [2024-11-22 21:45:19,312 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 132 places, 137 transitions, 1015 flow. Second operand has 16 states, 16 states have (on average 48.25) internal successors, (772), 16 states have internal predecessors, (772), 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) [2024-11-22 21:45:19,312 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 21:45:19,312 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 46 of 96 [2024-11-22 21:45:19,312 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-22 21:45:25,501 INFO L124 PetriNetUnfolderBase]: 52601/81521 cut-off events. [2024-11-22 21:45:25,502 INFO L125 PetriNetUnfolderBase]: For 172700/173952 co-relation queries the response was YES. [2024-11-22 21:45:25,893 INFO L83 FinitePrefix]: Finished finitePrefix Result has 235057 conditions, 81521 events. 52601/81521 cut-off events. For 172700/173952 co-relation queries the response was YES. Maximal size of possible extension queue 2392. Compared 645227 event pairs, 22579 based on Foata normal form. 792/77310 useless extension candidates. Maximal degree in co-relation 184241. Up to 14608 conditions per place. [2024-11-22 21:45:26,133 INFO L140 encePairwiseOnDemand]: 82/96 looper letters, 411 selfloop transitions, 110 changer transitions 0/545 dead transitions. [2024-11-22 21:45:26,133 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 163 places, 545 transitions, 4465 flow [2024-11-22 21:45:26,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2024-11-22 21:45:26,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2024-11-22 21:45:26,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 1827 transitions. [2024-11-22 21:45:26,136 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5947265625 [2024-11-22 21:45:26,136 INFO L175 Difference]: Start difference. First operand has 132 places, 137 transitions, 1015 flow. Second operand 32 states and 1827 transitions. [2024-11-22 21:45:26,136 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 163 places, 545 transitions, 4465 flow [2024-11-22 21:45:26,559 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 158 places, 545 transitions, 4299 flow, removed 14 selfloop flow, removed 5 redundant places. [2024-11-22 21:45:26,562 INFO L231 Difference]: Finished difference. Result has 165 places, 207 transitions, 1929 flow [2024-11-22 21:45:26,562 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=96, PETRI_DIFFERENCE_MINUEND_FLOW=956, PETRI_DIFFERENCE_MINUEND_PLACES=127, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=137, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=78, PETRI_DIFFERENCE_SUBTRAHEND_STATES=32, PETRI_FLOW=1929, PETRI_PLACES=165, PETRI_TRANSITIONS=207} [2024-11-22 21:45:26,563 INFO L277 CegarLoopForPetriNet]: 90 programPoint places, 75 predicate places. [2024-11-22 21:45:26,563 INFO L471 AbstractCegarLoop]: Abstraction has has 165 places, 207 transitions, 1929 flow [2024-11-22 21:45:26,563 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 48.25) internal successors, (772), 16 states have internal predecessors, (772), 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) [2024-11-22 21:45:26,563 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 21:45:26,563 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 21:45:26,572 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-11-22 21:45:26,763 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 21:45:26,764 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2024-11-22 21:45:26,764 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 21:45:26,764 INFO L85 PathProgramCache]: Analyzing trace with hash 2132818674, now seen corresponding path program 1 times [2024-11-22 21:45:26,764 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 21:45:26,764 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2128728326] [2024-11-22 21:45:26,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 21:45:26,764 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 21:45:26,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 21:45:26,966 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-22 21:45:26,966 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 21:45:26,967 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2128728326] [2024-11-22 21:45:26,967 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2128728326] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-22 21:45:26,967 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [995940480] [2024-11-22 21:45:26,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 21:45:26,967 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 21:45:26,967 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-22 21:45:26,969 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) [2024-11-22 21:45:26,970 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-11-22 21:45:27,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 21:45:27,047 INFO L255 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 20 conjuncts are in the unsatisfiable core [2024-11-22 21:45:27,048 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-22 21:45:27,054 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 6 treesize of output 5 [2024-11-22 21:45:27,093 INFO L349 Elim1Store]: treesize reduction 20, result has 33.3 percent of original size [2024-11-22 21:45:27,094 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 16 [2024-11-22 21:45:27,097 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2024-11-22 21:45:27,114 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-22 21:45:27,115 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2024-11-22 21:45:27,121 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-22 21:45:27,121 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2024-11-22 21:45:27,162 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-22 21:45:27,162 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-22 21:45:27,289 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 100 treesize of output 96 [2024-11-22 21:45:27,390 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-22 21:45:27,390 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [995940480] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-22 21:45:27,390 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-22 21:45:27,390 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 14 [2024-11-22 21:45:27,390 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1929613073] [2024-11-22 21:45:27,391 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-22 21:45:27,391 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-11-22 21:45:27,391 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 21:45:27,391 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-11-22 21:45:27,391 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=196, Unknown=0, NotChecked=0, Total=240 [2024-11-22 21:45:30,650 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.22s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-22 21:45:34,697 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 34 out of 96 [2024-11-22 21:45:34,698 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 165 places, 207 transitions, 1929 flow. Second operand has 16 states, 16 states have (on average 36.4375) internal successors, (583), 16 states have internal predecessors, (583), 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) [2024-11-22 21:45:34,698 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 21:45:34,698 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 34 of 96 [2024-11-22 21:45:34,698 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand