./Ultimate.py --spec /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/properties/valid-memsafety.prp --file /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/goblint-regression/28-race_reach_70-funloop_racefree.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version fca748b1 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 /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/goblint-regression/28-race_reach_70-funloop_racefree.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 2a10f98c1a89e2ac521234c9e4f0eca565cc5bc1484e9c7d67d861e216c6f9ba --- Real Ultimate output --- This is Ultimate 0.2.5-wip.dd.update-z3-fca748b-m [2024-11-20 17:36:24,956 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-20 17:36:25,032 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2024-11-20 17:36:25,041 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-20 17:36:25,042 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-20 17:36:25,069 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-20 17:36:25,070 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-20 17:36:25,071 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-20 17:36:25,072 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-20 17:36:25,074 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-20 17:36:25,074 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-20 17:36:25,074 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-20 17:36:25,075 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-20 17:36:25,075 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-20 17:36:25,075 INFO L153 SettingsManager]: * Use SBE=true [2024-11-20 17:36:25,076 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-20 17:36:25,076 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-20 17:36:25,078 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-20 17:36:25,079 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-20 17:36:25,079 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-20 17:36:25,081 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2024-11-20 17:36:25,081 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2024-11-20 17:36:25,081 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2024-11-20 17:36:25,082 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-20 17:36:25,082 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-11-20 17:36:25,082 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-20 17:36:25,082 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2024-11-20 17:36:25,082 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-20 17:36:25,083 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-20 17:36:25,083 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-20 17:36:25,083 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-20 17:36:25,083 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-20 17:36:25,084 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-20 17:36:25,084 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-20 17:36:25,084 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-20 17:36:25,084 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-20 17:36:25,084 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-20 17:36:25,085 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-20 17:36:25,085 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-20 17:36:25,086 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-20 17:36:25,086 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-20 17:36:25,086 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-20 17:36:25,086 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 2a10f98c1a89e2ac521234c9e4f0eca565cc5bc1484e9c7d67d861e216c6f9ba [2024-11-20 17:36:25,323 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-20 17:36:25,350 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-20 17:36:25,353 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-20 17:36:25,354 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-20 17:36:25,354 INFO L274 PluginConnector]: CDTParser initialized [2024-11-20 17:36:25,355 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/goblint-regression/28-race_reach_70-funloop_racefree.i [2024-11-20 17:36:26,822 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-20 17:36:27,063 INFO L384 CDTParser]: Found 1 translation units. [2024-11-20 17:36:27,064 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/goblint-regression/28-race_reach_70-funloop_racefree.i [2024-11-20 17:36:27,082 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/400e25925/daa6b772ab2645e4a861b521ebda445f/FLAG04ead87e6 [2024-11-20 17:36:27,101 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/400e25925/daa6b772ab2645e4a861b521ebda445f [2024-11-20 17:36:27,104 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-20 17:36:27,105 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-20 17:36:27,107 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-20 17:36:27,108 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-20 17:36:27,115 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-20 17:36:27,116 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 05:36:27" (1/1) ... [2024-11-20 17:36:27,117 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@550a784f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:36:27, skipping insertion in model container [2024-11-20 17:36:27,117 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 05:36:27" (1/1) ... [2024-11-20 17:36:27,160 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-20 17:36:27,687 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-20 17:36:27,730 INFO L200 MainTranslator]: Completed pre-run [2024-11-20 17:36:27,790 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-20 17:36:27,862 INFO L204 MainTranslator]: Completed translation [2024-11-20 17:36:27,862 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:36:27 WrapperNode [2024-11-20 17:36:27,863 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-20 17:36:27,864 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-20 17:36:27,865 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-20 17:36:27,865 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-20 17:36:27,873 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:36:27" (1/1) ... [2024-11-20 17:36:27,898 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:36:27" (1/1) ... [2024-11-20 17:36:27,941 INFO L138 Inliner]: procedures = 272, calls = 96, calls flagged for inlining = 6, calls inlined = 8, statements flattened = 281 [2024-11-20 17:36:27,942 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-20 17:36:27,943 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-20 17:36:27,943 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-20 17:36:27,944 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-20 17:36:27,955 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:36:27" (1/1) ... [2024-11-20 17:36:27,956 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:36:27" (1/1) ... [2024-11-20 17:36:27,964 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:36:27" (1/1) ... [2024-11-20 17:36:27,984 INFO L175 MemorySlicer]: Split 79 memory accesses to 4 slices as follows [2, 5, 70, 2]. 89 percent of accesses are in the largest equivalence class. The 67 initializations are split as follows [2, 5, 60, 0]. The 5 writes are split as follows [0, 0, 4, 1]. [2024-11-20 17:36:27,985 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:36:27" (1/1) ... [2024-11-20 17:36:27,989 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:36:27" (1/1) ... [2024-11-20 17:36:28,000 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:36:27" (1/1) ... [2024-11-20 17:36:28,004 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:36:27" (1/1) ... [2024-11-20 17:36:28,007 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:36:27" (1/1) ... [2024-11-20 17:36:28,009 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:36:27" (1/1) ... [2024-11-20 17:36:28,012 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-20 17:36:28,013 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-20 17:36:28,014 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-20 17:36:28,014 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-20 17:36:28,015 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:36:27" (1/1) ... [2024-11-20 17:36:28,026 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-20 17:36:28,045 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-20 17:36:28,069 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) [2024-11-20 17:36:28,074 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 [2024-11-20 17:36:28,124 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-11-20 17:36:28,125 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-11-20 17:36:28,125 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexUnlock [2024-11-20 17:36:28,125 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-11-20 17:36:28,125 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-11-20 17:36:28,125 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2024-11-20 17:36:28,125 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#3 [2024-11-20 17:36:28,126 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-11-20 17:36:28,126 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-11-20 17:36:28,126 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2024-11-20 17:36:28,126 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2024-11-20 17:36:28,128 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2024-11-20 17:36:28,128 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-20 17:36:28,128 INFO L130 BoogieDeclarations]: Found specification of procedure t_fun [2024-11-20 17:36:28,128 INFO L138 BoogieDeclarations]: Found implementation of procedure t_fun [2024-11-20 17:36:28,129 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-20 17:36:28,129 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-11-20 17:36:28,129 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-11-20 17:36:28,129 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2024-11-20 17:36:28,130 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-20 17:36:28,130 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-20 17:36:28,133 WARN L207 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2024-11-20 17:36:28,305 INFO L238 CfgBuilder]: Building ICFG [2024-11-20 17:36:28,307 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-20 17:36:28,756 INFO L283 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-11-20 17:36:28,756 INFO L287 CfgBuilder]: Performing block encoding [2024-11-20 17:36:29,277 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-20 17:36:29,279 INFO L316 CfgBuilder]: Removed 25 assume(true) statements. [2024-11-20 17:36:29,279 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 05:36:29 BoogieIcfgContainer [2024-11-20 17:36:29,279 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-20 17:36:29,282 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-20 17:36:29,282 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-20 17:36:29,286 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-20 17:36:29,286 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.11 05:36:27" (1/3) ... [2024-11-20 17:36:29,287 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@479d4f85 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 05:36:29, skipping insertion in model container [2024-11-20 17:36:29,287 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:36:27" (2/3) ... [2024-11-20 17:36:29,288 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@479d4f85 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 05:36:29, skipping insertion in model container [2024-11-20 17:36:29,288 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 05:36:29" (3/3) ... [2024-11-20 17:36:29,289 INFO L112 eAbstractionObserver]: Analyzing ICFG 28-race_reach_70-funloop_racefree.i [2024-11-20 17:36:29,306 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-20 17:36:29,306 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 27 error locations. [2024-11-20 17:36:29,306 INFO L489 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-11-20 17:36:29,376 INFO L143 ThreadInstanceAdder]: Constructed 1 joinOtherThreadTransitions. [2024-11-20 17:36:29,417 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 114 places, 141 transitions, 289 flow [2024-11-20 17:36:29,490 INFO L124 PetriNetUnfolderBase]: 44/213 cut-off events. [2024-11-20 17:36:29,490 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2024-11-20 17:36:29,497 INFO L83 FinitePrefix]: Finished finitePrefix Result has 218 conditions, 213 events. 44/213 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 1021 event pairs, 0 based on Foata normal form. 0/123 useless extension candidates. Maximal degree in co-relation 134. Up to 8 conditions per place. [2024-11-20 17:36:29,497 INFO L82 GeneralOperation]: Start removeDead. Operand has 114 places, 141 transitions, 289 flow [2024-11-20 17:36:29,503 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 114 places, 141 transitions, 289 flow [2024-11-20 17:36:29,517 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-20 17:36:29,526 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;@22126819, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-20 17:36:29,526 INFO L334 AbstractCegarLoop]: Starting to check reachability of 39 error locations. [2024-11-20 17:36:29,530 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-11-20 17:36:29,531 INFO L124 PetriNetUnfolderBase]: 1/6 cut-off events. [2024-11-20 17:36:29,531 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-11-20 17:36:29,531 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 17:36:29,532 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2024-11-20 17:36:29,533 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2024-11-20 17:36:29,538 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 17:36:29,538 INFO L85 PathProgramCache]: Analyzing trace with hash 22359306, now seen corresponding path program 1 times [2024-11-20 17:36:29,547 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 17:36:29,548 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [23834448] [2024-11-20 17:36:29,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 17:36:29,548 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 17:36:29,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 17:36:29,872 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 17:36:29,873 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 17:36:29,873 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [23834448] [2024-11-20 17:36:29,874 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [23834448] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-20 17:36:29,874 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-20 17:36:29,874 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-20 17:36:29,875 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [871970301] [2024-11-20 17:36:29,876 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-20 17:36:29,884 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-20 17:36:29,890 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 17:36:29,919 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-20 17:36:29,921 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-20 17:36:29,923 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 61 out of 141 [2024-11-20 17:36:29,926 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 114 places, 141 transitions, 289 flow. Second operand has 3 states, 3 states have (on average 62.0) internal successors, (186), 3 states have internal predecessors, (186), 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) [2024-11-20 17:36:29,927 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 17:36:29,927 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 61 of 141 [2024-11-20 17:36:29,928 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 17:36:30,336 INFO L124 PetriNetUnfolderBase]: 625/2072 cut-off events. [2024-11-20 17:36:30,337 INFO L125 PetriNetUnfolderBase]: For 4/6 co-relation queries the response was YES. [2024-11-20 17:36:30,347 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3265 conditions, 2072 events. 625/2072 cut-off events. For 4/6 co-relation queries the response was YES. Maximal size of possible extension queue 85. Compared 15912 event pairs, 525 based on Foata normal form. 394/2156 useless extension candidates. Maximal degree in co-relation 3159. Up to 1187 conditions per place. [2024-11-20 17:36:30,359 INFO L140 encePairwiseOnDemand]: 114/141 looper letters, 53 selfloop transitions, 2 changer transitions 0/116 dead transitions. [2024-11-20 17:36:30,360 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 114 places, 116 transitions, 349 flow [2024-11-20 17:36:30,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-20 17:36:30,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-20 17:36:30,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 263 transitions. [2024-11-20 17:36:30,372 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6217494089834515 [2024-11-20 17:36:30,374 INFO L175 Difference]: Start difference. First operand has 114 places, 141 transitions, 289 flow. Second operand 3 states and 263 transitions. [2024-11-20 17:36:30,375 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 114 places, 116 transitions, 349 flow [2024-11-20 17:36:30,378 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 114 places, 116 transitions, 349 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-11-20 17:36:30,382 INFO L231 Difference]: Finished difference. Result has 115 places, 116 transitions, 249 flow [2024-11-20 17:36:30,384 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=141, PETRI_DIFFERENCE_MINUEND_FLOW=237, PETRI_DIFFERENCE_MINUEND_PLACES=112, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=115, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=113, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=249, PETRI_PLACES=115, PETRI_TRANSITIONS=116} [2024-11-20 17:36:30,389 INFO L277 CegarLoopForPetriNet]: 114 programPoint places, 1 predicate places. [2024-11-20 17:36:30,389 INFO L471 AbstractCegarLoop]: Abstraction has has 115 places, 116 transitions, 249 flow [2024-11-20 17:36:30,389 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 62.0) internal successors, (186), 3 states have internal predecessors, (186), 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) [2024-11-20 17:36:30,390 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 17:36:30,390 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2024-11-20 17:36:30,390 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-20 17:36:30,391 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2024-11-20 17:36:30,391 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 17:36:30,391 INFO L85 PathProgramCache]: Analyzing trace with hash 693133463, now seen corresponding path program 1 times [2024-11-20 17:36:30,392 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 17:36:30,392 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [159216126] [2024-11-20 17:36:30,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 17:36:30,392 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 17:36:30,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 17:36:30,516 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 17:36:30,516 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 17:36:30,516 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [159216126] [2024-11-20 17:36:30,516 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [159216126] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-20 17:36:30,517 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [293185095] [2024-11-20 17:36:30,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 17:36:30,517 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 17:36:30,517 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-20 17:36:30,520 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) [2024-11-20 17:36:30,521 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-20 17:36:30,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 17:36:30,621 INFO L255 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-11-20 17:36:30,625 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-20 17:36:30,662 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 17:36:30,662 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-20 17:36:30,680 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 17:36:30,681 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [293185095] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-20 17:36:30,681 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-20 17:36:30,681 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2024-11-20 17:36:30,682 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [632438816] [2024-11-20 17:36:30,682 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-20 17:36:30,683 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-20 17:36:30,684 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 17:36:30,684 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-20 17:36:30,685 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-11-20 17:36:30,686 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 61 out of 141 [2024-11-20 17:36:30,688 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 115 places, 116 transitions, 249 flow. Second operand has 7 states, 7 states have (on average 62.285714285714285) internal successors, (436), 7 states have internal predecessors, (436), 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) [2024-11-20 17:36:30,688 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 17:36:30,688 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 61 of 141 [2024-11-20 17:36:30,689 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 17:36:31,057 INFO L124 PetriNetUnfolderBase]: 625/2075 cut-off events. [2024-11-20 17:36:31,057 INFO L125 PetriNetUnfolderBase]: For 4/6 co-relation queries the response was YES. [2024-11-20 17:36:31,062 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3281 conditions, 2075 events. 625/2075 cut-off events. For 4/6 co-relation queries the response was YES. Maximal size of possible extension queue 85. Compared 15930 event pairs, 525 based on Foata normal form. 0/1765 useless extension candidates. Maximal degree in co-relation 3269. Up to 1187 conditions per place. [2024-11-20 17:36:31,071 INFO L140 encePairwiseOnDemand]: 138/141 looper letters, 53 selfloop transitions, 5 changer transitions 0/119 dead transitions. [2024-11-20 17:36:31,071 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 120 places, 119 transitions, 377 flow [2024-11-20 17:36:31,072 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-20 17:36:31,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-20 17:36:31,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 427 transitions. [2024-11-20 17:36:31,075 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5047281323877069 [2024-11-20 17:36:31,075 INFO L175 Difference]: Start difference. First operand has 115 places, 116 transitions, 249 flow. Second operand 6 states and 427 transitions. [2024-11-20 17:36:31,075 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 120 places, 119 transitions, 377 flow [2024-11-20 17:36:31,077 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 119 places, 119 transitions, 373 flow, removed 1 selfloop flow, removed 1 redundant places. [2024-11-20 17:36:31,078 INFO L231 Difference]: Finished difference. Result has 122 places, 119 transitions, 281 flow [2024-11-20 17:36:31,079 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=141, PETRI_DIFFERENCE_MINUEND_FLOW=245, PETRI_DIFFERENCE_MINUEND_PLACES=114, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=116, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=113, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=281, PETRI_PLACES=122, PETRI_TRANSITIONS=119} [2024-11-20 17:36:31,079 INFO L277 CegarLoopForPetriNet]: 114 programPoint places, 8 predicate places. [2024-11-20 17:36:31,080 INFO L471 AbstractCegarLoop]: Abstraction has has 122 places, 119 transitions, 281 flow [2024-11-20 17:36:31,080 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 62.285714285714285) internal successors, (436), 7 states have internal predecessors, (436), 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) [2024-11-20 17:36:31,080 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 17:36:31,080 INFO L204 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1, 1] [2024-11-20 17:36:31,099 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-11-20 17:36:31,281 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 17:36:31,282 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2024-11-20 17:36:31,283 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 17:36:31,283 INFO L85 PathProgramCache]: Analyzing trace with hash -1068781557, now seen corresponding path program 2 times [2024-11-20 17:36:31,283 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 17:36:31,283 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1538727662] [2024-11-20 17:36:31,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 17:36:31,283 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 17:36:31,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 17:36:31,428 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 17:36:31,429 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 17:36:31,429 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1538727662] [2024-11-20 17:36:31,429 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1538727662] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-20 17:36:31,429 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1484576] [2024-11-20 17:36:31,429 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-20 17:36:31,430 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 17:36:31,430 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-20 17:36:31,432 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) [2024-11-20 17:36:31,434 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-20 17:36:31,522 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-11-20 17:36:31,522 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-20 17:36:31,523 INFO L255 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-11-20 17:36:31,525 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-20 17:36:31,571 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2024-11-20 17:36:31,599 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-11-20 17:36:31,599 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-20 17:36:31,599 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1484576] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-20 17:36:31,601 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-20 17:36:31,601 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [6] total 8 [2024-11-20 17:36:31,602 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1830976746] [2024-11-20 17:36:31,602 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-20 17:36:31,602 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-20 17:36:31,602 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 17:36:31,603 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-20 17:36:31,603 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-11-20 17:36:31,637 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 60 out of 141 [2024-11-20 17:36:31,638 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 122 places, 119 transitions, 281 flow. Second operand has 3 states, 3 states have (on average 61.666666666666664) internal successors, (185), 3 states have internal predecessors, (185), 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) [2024-11-20 17:36:31,638 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 17:36:31,638 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 60 of 141 [2024-11-20 17:36:31,638 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 17:36:31,997 INFO L124 PetriNetUnfolderBase]: 619/1982 cut-off events. [2024-11-20 17:36:31,998 INFO L125 PetriNetUnfolderBase]: For 6/6 co-relation queries the response was YES. [2024-11-20 17:36:32,003 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3212 conditions, 1982 events. 619/1982 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 87. Compared 15582 event pairs, 0 based on Foata normal form. 1/1672 useless extension candidates. Maximal degree in co-relation 3178. Up to 1177 conditions per place. [2024-11-20 17:36:32,012 INFO L140 encePairwiseOnDemand]: 137/141 looper letters, 80 selfloop transitions, 2 changer transitions 0/142 dead transitions. [2024-11-20 17:36:32,013 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 124 places, 142 transitions, 491 flow [2024-11-20 17:36:32,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-20 17:36:32,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-20 17:36:32,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 260 transitions. [2024-11-20 17:36:32,015 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6146572104018913 [2024-11-20 17:36:32,015 INFO L175 Difference]: Start difference. First operand has 122 places, 119 transitions, 281 flow. Second operand 3 states and 260 transitions. [2024-11-20 17:36:32,015 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 124 places, 142 transitions, 491 flow [2024-11-20 17:36:32,020 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 123 places, 142 transitions, 477 flow, removed 6 selfloop flow, removed 1 redundant places. [2024-11-20 17:36:32,024 INFO L231 Difference]: Finished difference. Result has 124 places, 119 transitions, 277 flow [2024-11-20 17:36:32,024 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=141, PETRI_DIFFERENCE_MINUEND_FLOW=267, PETRI_DIFFERENCE_MINUEND_PLACES=121, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=119, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=117, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=277, PETRI_PLACES=124, PETRI_TRANSITIONS=119} [2024-11-20 17:36:32,025 INFO L277 CegarLoopForPetriNet]: 114 programPoint places, 10 predicate places. [2024-11-20 17:36:32,026 INFO L471 AbstractCegarLoop]: Abstraction has has 124 places, 119 transitions, 277 flow [2024-11-20 17:36:32,027 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 61.666666666666664) internal successors, (185), 3 states have internal predecessors, (185), 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) [2024-11-20 17:36:32,027 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 17:36:32,027 INFO L204 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1, 1] [2024-11-20 17:36:32,037 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-11-20 17:36:32,231 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,SelfDestructingSolverStorable2 [2024-11-20 17:36:32,232 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2024-11-20 17:36:32,233 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 17:36:32,233 INFO L85 PathProgramCache]: Analyzing trace with hash -1068781558, now seen corresponding path program 1 times [2024-11-20 17:36:32,233 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 17:36:32,233 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [526803293] [2024-11-20 17:36:32,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 17:36:32,234 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 17:36:32,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 17:36:32,318 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-11-20 17:36:32,318 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 17:36:32,319 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [526803293] [2024-11-20 17:36:32,319 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [526803293] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-20 17:36:32,319 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-20 17:36:32,319 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-20 17:36:32,320 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [337822148] [2024-11-20 17:36:32,320 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-20 17:36:32,321 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-20 17:36:32,321 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 17:36:32,322 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-20 17:36:32,323 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-20 17:36:32,358 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 57 out of 141 [2024-11-20 17:36:32,359 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 124 places, 119 transitions, 277 flow. Second operand has 3 states, 3 states have (on average 58.666666666666664) internal successors, (176), 3 states have internal predecessors, (176), 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) [2024-11-20 17:36:32,359 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 17:36:32,359 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 57 of 141 [2024-11-20 17:36:32,359 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 17:36:32,682 INFO L124 PetriNetUnfolderBase]: 666/2129 cut-off events. [2024-11-20 17:36:32,682 INFO L125 PetriNetUnfolderBase]: For 58/58 co-relation queries the response was YES. [2024-11-20 17:36:32,686 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3479 conditions, 2129 events. 666/2129 cut-off events. For 58/58 co-relation queries the response was YES. Maximal size of possible extension queue 93. Compared 16498 event pairs, 525 based on Foata normal form. 0/1858 useless extension candidates. Maximal degree in co-relation 3450. Up to 1161 conditions per place. [2024-11-20 17:36:32,692 INFO L140 encePairwiseOnDemand]: 137/141 looper letters, 80 selfloop transitions, 2 changer transitions 0/139 dead transitions. [2024-11-20 17:36:32,692 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 124 places, 139 transitions, 481 flow [2024-11-20 17:36:32,693 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-20 17:36:32,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-20 17:36:32,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 251 transitions. [2024-11-20 17:36:32,694 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5933806146572104 [2024-11-20 17:36:32,694 INFO L175 Difference]: Start difference. First operand has 124 places, 119 transitions, 277 flow. Second operand 3 states and 251 transitions. [2024-11-20 17:36:32,694 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 124 places, 139 transitions, 481 flow [2024-11-20 17:36:32,696 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 122 places, 139 transitions, 477 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-20 17:36:32,700 INFO L231 Difference]: Finished difference. Result has 122 places, 117 transitions, 273 flow [2024-11-20 17:36:32,700 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=141, PETRI_DIFFERENCE_MINUEND_FLOW=269, PETRI_DIFFERENCE_MINUEND_PLACES=120, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=117, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=115, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=273, PETRI_PLACES=122, PETRI_TRANSITIONS=117} [2024-11-20 17:36:32,702 INFO L277 CegarLoopForPetriNet]: 114 programPoint places, 8 predicate places. [2024-11-20 17:36:32,702 INFO L471 AbstractCegarLoop]: Abstraction has has 122 places, 117 transitions, 273 flow [2024-11-20 17:36:32,702 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 58.666666666666664) internal successors, (176), 3 states have internal predecessors, (176), 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) [2024-11-20 17:36:32,702 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 17:36:32,702 INFO L204 CegarLoopForPetriNet]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1] [2024-11-20 17:36:32,703 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-11-20 17:36:32,703 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2024-11-20 17:36:32,703 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 17:36:32,703 INFO L85 PathProgramCache]: Analyzing trace with hash 1426733069, now seen corresponding path program 1 times [2024-11-20 17:36:32,704 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 17:36:32,704 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [484862446] [2024-11-20 17:36:32,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 17:36:32,705 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 17:36:32,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 17:36:32,809 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-20 17:36:32,809 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 17:36:32,809 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [484862446] [2024-11-20 17:36:32,810 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [484862446] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-20 17:36:32,810 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2012480251] [2024-11-20 17:36:32,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 17:36:32,810 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 17:36:32,810 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-20 17:36:32,814 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) [2024-11-20 17:36:32,815 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-20 17:36:32,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 17:36:32,906 INFO L255 TraceCheckSpWp]: Trace formula consists of 236 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-11-20 17:36:32,907 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-20 17:36:32,929 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-20 17:36:32,929 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-20 17:36:32,989 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-20 17:36:32,990 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2012480251] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-20 17:36:32,990 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-20 17:36:32,990 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2024-11-20 17:36:32,990 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1668698436] [2024-11-20 17:36:32,991 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-20 17:36:32,991 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-11-20 17:36:32,991 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 17:36:32,992 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-11-20 17:36:32,992 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2024-11-20 17:36:32,994 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 61 out of 141 [2024-11-20 17:36:32,995 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 122 places, 117 transitions, 273 flow. Second operand has 13 states, 13 states have (on average 62.30769230769231) internal successors, (810), 13 states have internal predecessors, (810), 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) [2024-11-20 17:36:32,995 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 17:36:32,995 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 61 of 141 [2024-11-20 17:36:32,995 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 17:36:33,291 INFO L124 PetriNetUnfolderBase]: 622/2038 cut-off events. [2024-11-20 17:36:33,291 INFO L125 PetriNetUnfolderBase]: For 116/116 co-relation queries the response was YES. [2024-11-20 17:36:33,296 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3317 conditions, 2038 events. 622/2038 cut-off events. For 116/116 co-relation queries the response was YES. Maximal size of possible extension queue 86. Compared 15532 event pairs, 525 based on Foata normal form. 6/1772 useless extension candidates. Maximal degree in co-relation 3264. Up to 1164 conditions per place. [2024-11-20 17:36:33,304 INFO L140 encePairwiseOnDemand]: 138/141 looper letters, 53 selfloop transitions, 11 changer transitions 0/123 dead transitions. [2024-11-20 17:36:33,305 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 133 places, 123 transitions, 437 flow [2024-11-20 17:36:33,305 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-11-20 17:36:33,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-11-20 17:36:33,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 802 transitions. [2024-11-20 17:36:33,307 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4739952718676123 [2024-11-20 17:36:33,307 INFO L175 Difference]: Start difference. First operand has 122 places, 117 transitions, 273 flow. Second operand 12 states and 802 transitions. [2024-11-20 17:36:33,307 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 133 places, 123 transitions, 437 flow [2024-11-20 17:36:33,309 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 131 places, 123 transitions, 433 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-20 17:36:33,311 INFO L231 Difference]: Finished difference. Result has 137 places, 123 transitions, 353 flow [2024-11-20 17:36:33,312 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=141, PETRI_DIFFERENCE_MINUEND_FLOW=269, PETRI_DIFFERENCE_MINUEND_PLACES=120, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=117, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=111, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=353, PETRI_PLACES=137, PETRI_TRANSITIONS=123} [2024-11-20 17:36:33,312 INFO L277 CegarLoopForPetriNet]: 114 programPoint places, 23 predicate places. [2024-11-20 17:36:33,312 INFO L471 AbstractCegarLoop]: Abstraction has has 137 places, 123 transitions, 353 flow [2024-11-20 17:36:33,313 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 62.30769230769231) internal successors, (810), 13 states have internal predecessors, (810), 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) [2024-11-20 17:36:33,313 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 17:36:33,313 INFO L204 CegarLoopForPetriNet]: trace histogram [10, 2, 1, 1, 1, 1, 1, 1] [2024-11-20 17:36:33,323 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2024-11-20 17:36:33,517 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 17:36:33,518 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2024-11-20 17:36:33,518 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 17:36:33,518 INFO L85 PathProgramCache]: Analyzing trace with hash -258610035, now seen corresponding path program 2 times [2024-11-20 17:36:33,518 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 17:36:33,519 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1571470368] [2024-11-20 17:36:33,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 17:36:33,519 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 17:36:33,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 17:36:33,687 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2024-11-20 17:36:33,688 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 17:36:33,688 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1571470368] [2024-11-20 17:36:33,688 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1571470368] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-20 17:36:33,688 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [598870092] [2024-11-20 17:36:33,688 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-20 17:36:33,688 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 17:36:33,689 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-20 17:36:33,691 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) [2024-11-20 17:36:33,692 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-20 17:36:33,787 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-20 17:36:33,787 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-20 17:36:33,789 INFO L255 TraceCheckSpWp]: Trace formula consists of 278 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-20 17:36:33,790 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-20 17:36:33,806 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2024-11-20 17:36:33,890 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2024-11-20 17:36:33,890 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-20 17:36:33,891 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [598870092] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-20 17:36:33,891 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-20 17:36:33,892 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [3] total 6 [2024-11-20 17:36:33,892 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [588852095] [2024-11-20 17:36:33,892 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-20 17:36:33,892 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-20 17:36:33,893 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 17:36:33,893 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-20 17:36:33,893 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-11-20 17:36:33,961 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 60 out of 141 [2024-11-20 17:36:33,962 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 137 places, 123 transitions, 353 flow. Second operand has 5 states, 5 states have (on average 61.6) internal successors, (308), 5 states have internal predecessors, (308), 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) [2024-11-20 17:36:33,962 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 17:36:33,962 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 60 of 141 [2024-11-20 17:36:33,962 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 17:36:34,312 INFO L124 PetriNetUnfolderBase]: 598/1923 cut-off events. [2024-11-20 17:36:34,312 INFO L125 PetriNetUnfolderBase]: For 60/60 co-relation queries the response was YES. [2024-11-20 17:36:34,317 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3196 conditions, 1923 events. 598/1923 cut-off events. For 60/60 co-relation queries the response was YES. Maximal size of possible extension queue 85. Compared 14970 event pairs, 0 based on Foata normal form. 22/1700 useless extension candidates. Maximal degree in co-relation 3119. Up to 1051 conditions per place. [2024-11-20 17:36:34,326 INFO L140 encePairwiseOnDemand]: 136/141 looper letters, 127 selfloop transitions, 4 changer transitions 0/189 dead transitions. [2024-11-20 17:36:34,326 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 140 places, 189 transitions, 745 flow [2024-11-20 17:36:34,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-20 17:36:34,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-20 17:36:34,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 422 transitions. [2024-11-20 17:36:34,328 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5985815602836879 [2024-11-20 17:36:34,328 INFO L175 Difference]: Start difference. First operand has 137 places, 123 transitions, 353 flow. Second operand 5 states and 422 transitions. [2024-11-20 17:36:34,328 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 140 places, 189 transitions, 745 flow [2024-11-20 17:36:34,331 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 135 places, 189 transitions, 697 flow, removed 19 selfloop flow, removed 5 redundant places. [2024-11-20 17:36:34,333 INFO L231 Difference]: Finished difference. Result has 136 places, 123 transitions, 316 flow [2024-11-20 17:36:34,334 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=141, PETRI_DIFFERENCE_MINUEND_FLOW=301, PETRI_DIFFERENCE_MINUEND_PLACES=131, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=122, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=118, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=316, PETRI_PLACES=136, PETRI_TRANSITIONS=123} [2024-11-20 17:36:34,334 INFO L277 CegarLoopForPetriNet]: 114 programPoint places, 22 predicate places. [2024-11-20 17:36:34,335 INFO L471 AbstractCegarLoop]: Abstraction has has 136 places, 123 transitions, 316 flow [2024-11-20 17:36:34,335 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 61.6) internal successors, (308), 5 states have internal predecessors, (308), 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) [2024-11-20 17:36:34,335 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 17:36:34,335 INFO L204 CegarLoopForPetriNet]: trace histogram [10, 2, 2, 1, 1, 1, 1, 1] [2024-11-20 17:36:34,344 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-11-20 17:36:34,536 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 17:36:34,537 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2024-11-20 17:36:34,537 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 17:36:34,537 INFO L85 PathProgramCache]: Analyzing trace with hash 573024315, now seen corresponding path program 1 times [2024-11-20 17:36:34,537 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 17:36:34,537 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1490094692] [2024-11-20 17:36:34,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 17:36:34,538 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 17:36:34,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-11-20 17:36:34,568 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2024-11-20 17:36:34,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-11-20 17:36:34,614 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2024-11-20 17:36:34,615 INFO L325 BasicCegarLoop]: Counterexample is feasible [2024-11-20 17:36:34,616 INFO L782 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (38 of 39 remaining) [2024-11-20 17:36:34,618 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (37 of 39 remaining) [2024-11-20 17:36:34,619 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (36 of 39 remaining) [2024-11-20 17:36:34,619 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (35 of 39 remaining) [2024-11-20 17:36:34,619 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr14REQUIRES_VIOLATIONMEMORY_DEREFERENCE (34 of 39 remaining) [2024-11-20 17:36:34,619 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr15ASSERT_VIOLATIONMEMORY_LEAK (33 of 39 remaining) [2024-11-20 17:36:34,619 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE (32 of 39 remaining) [2024-11-20 17:36:34,619 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE (31 of 39 remaining) [2024-11-20 17:36:34,619 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (30 of 39 remaining) [2024-11-20 17:36:34,620 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (29 of 39 remaining) [2024-11-20 17:36:34,620 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (28 of 39 remaining) [2024-11-20 17:36:34,620 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (27 of 39 remaining) [2024-11-20 17:36:34,620 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (26 of 39 remaining) [2024-11-20 17:36:34,620 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (25 of 39 remaining) [2024-11-20 17:36:34,620 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (24 of 39 remaining) [2024-11-20 17:36:34,620 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (23 of 39 remaining) [2024-11-20 17:36:34,620 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK (22 of 39 remaining) [2024-11-20 17:36:34,620 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (21 of 39 remaining) [2024-11-20 17:36:34,621 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (20 of 39 remaining) [2024-11-20 17:36:34,621 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (19 of 39 remaining) [2024-11-20 17:36:34,621 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (18 of 39 remaining) [2024-11-20 17:36:34,621 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (17 of 39 remaining) [2024-11-20 17:36:34,621 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (16 of 39 remaining) [2024-11-20 17:36:34,621 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (15 of 39 remaining) [2024-11-20 17:36:34,621 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (14 of 39 remaining) [2024-11-20 17:36:34,621 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (13 of 39 remaining) [2024-11-20 17:36:34,621 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (12 of 39 remaining) [2024-11-20 17:36:34,622 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr10ASSERT_VIOLATIONMEMORY_LEAK (11 of 39 remaining) [2024-11-20 17:36:34,622 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (10 of 39 remaining) [2024-11-20 17:36:34,622 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (9 of 39 remaining) [2024-11-20 17:36:34,622 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (8 of 39 remaining) [2024-11-20 17:36:34,626 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (7 of 39 remaining) [2024-11-20 17:36:34,626 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (6 of 39 remaining) [2024-11-20 17:36:34,627 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 39 remaining) [2024-11-20 17:36:34,628 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 39 remaining) [2024-11-20 17:36:34,628 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (3 of 39 remaining) [2024-11-20 17:36:34,628 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (2 of 39 remaining) [2024-11-20 17:36:34,628 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (1 of 39 remaining) [2024-11-20 17:36:34,628 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr10ASSERT_VIOLATIONMEMORY_LEAK (0 of 39 remaining) [2024-11-20 17:36:34,629 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-11-20 17:36:34,629 INFO L407 BasicCegarLoop]: Path program histogram: [2, 2, 1, 1, 1] [2024-11-20 17:36:34,632 WARN L244 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2024-11-20 17:36:34,632 INFO L489 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2024-11-20 17:36:34,671 INFO L143 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2024-11-20 17:36:34,673 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 164 places, 204 transitions, 424 flow [2024-11-20 17:36:34,720 INFO L124 PetriNetUnfolderBase]: 74/360 cut-off events. [2024-11-20 17:36:34,721 INFO L125 PetriNetUnfolderBase]: For 6/6 co-relation queries the response was YES. [2024-11-20 17:36:34,723 INFO L83 FinitePrefix]: Finished finitePrefix Result has 372 conditions, 360 events. 74/360 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 27. Compared 2070 event pairs, 0 based on Foata normal form. 0/209 useless extension candidates. Maximal degree in co-relation 215. Up to 12 conditions per place. [2024-11-20 17:36:34,723 INFO L82 GeneralOperation]: Start removeDead. Operand has 164 places, 204 transitions, 424 flow [2024-11-20 17:36:34,727 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 164 places, 204 transitions, 424 flow [2024-11-20 17:36:34,728 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-20 17:36:34,729 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;@22126819, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-20 17:36:34,729 INFO L334 AbstractCegarLoop]: Starting to check reachability of 50 error locations. [2024-11-20 17:36:34,731 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-11-20 17:36:34,731 INFO L124 PetriNetUnfolderBase]: 1/6 cut-off events. [2024-11-20 17:36:34,731 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-11-20 17:36:34,732 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 17:36:34,732 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2024-11-20 17:36:34,732 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 47 more)] === [2024-11-20 17:36:34,732 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 17:36:34,732 INFO L85 PathProgramCache]: Analyzing trace with hash 28639242, now seen corresponding path program 1 times [2024-11-20 17:36:34,733 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 17:36:34,733 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [854667455] [2024-11-20 17:36:34,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 17:36:34,733 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 17:36:34,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 17:36:34,762 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 17:36:34,763 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 17:36:34,763 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [854667455] [2024-11-20 17:36:34,763 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [854667455] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-20 17:36:34,763 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-20 17:36:34,764 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-20 17:36:34,764 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1808359979] [2024-11-20 17:36:34,764 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-20 17:36:34,764 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-20 17:36:34,764 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 17:36:34,765 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-20 17:36:34,765 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-20 17:36:34,765 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 87 out of 204 [2024-11-20 17:36:34,766 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 164 places, 204 transitions, 424 flow. Second operand has 3 states, 3 states have (on average 88.0) internal successors, (264), 3 states have internal predecessors, (264), 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) [2024-11-20 17:36:34,766 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 17:36:34,766 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 87 of 204 [2024-11-20 17:36:34,766 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 17:36:40,430 INFO L124 PetriNetUnfolderBase]: 27581/60837 cut-off events. [2024-11-20 17:36:40,430 INFO L125 PetriNetUnfolderBase]: For 200/205 co-relation queries the response was YES. [2024-11-20 17:36:40,581 INFO L83 FinitePrefix]: Finished finitePrefix Result has 100897 conditions, 60837 events. 27581/60837 cut-off events. For 200/205 co-relation queries the response was YES. Maximal size of possible extension queue 1685. Compared 679650 event pairs, 24192 based on Foata normal form. 13675/66308 useless extension candidates. Maximal degree in co-relation 93084. Up to 39942 conditions per place. [2024-11-20 17:36:40,878 INFO L140 encePairwiseOnDemand]: 165/204 looper letters, 77 selfloop transitions, 2 changer transitions 0/166 dead transitions. [2024-11-20 17:36:40,878 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 163 places, 166 transitions, 506 flow [2024-11-20 17:36:40,878 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-20 17:36:40,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-20 17:36:40,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 377 transitions. [2024-11-20 17:36:40,880 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6160130718954249 [2024-11-20 17:36:40,880 INFO L175 Difference]: Start difference. First operand has 164 places, 204 transitions, 424 flow. Second operand 3 states and 377 transitions. [2024-11-20 17:36:40,880 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 163 places, 166 transitions, 506 flow [2024-11-20 17:36:40,882 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 163 places, 166 transitions, 506 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-11-20 17:36:40,886 INFO L231 Difference]: Finished difference. Result has 164 places, 166 transitions, 358 flow [2024-11-20 17:36:40,887 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=204, PETRI_DIFFERENCE_MINUEND_FLOW=346, PETRI_DIFFERENCE_MINUEND_PLACES=161, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=165, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=163, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=358, PETRI_PLACES=164, PETRI_TRANSITIONS=166} [2024-11-20 17:36:40,888 INFO L277 CegarLoopForPetriNet]: 164 programPoint places, 0 predicate places. [2024-11-20 17:36:40,888 INFO L471 AbstractCegarLoop]: Abstraction has has 164 places, 166 transitions, 358 flow [2024-11-20 17:36:40,889 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 88.0) internal successors, (264), 3 states have internal predecessors, (264), 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) [2024-11-20 17:36:40,889 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 17:36:40,889 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2024-11-20 17:36:40,889 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-11-20 17:36:40,890 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 47 more)] === [2024-11-20 17:36:40,890 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 17:36:40,890 INFO L85 PathProgramCache]: Analyzing trace with hash 887811682, now seen corresponding path program 1 times [2024-11-20 17:36:40,890 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 17:36:40,890 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1553265668] [2024-11-20 17:36:40,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 17:36:40,891 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 17:36:40,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 17:36:40,940 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 17:36:40,941 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 17:36:40,941 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1553265668] [2024-11-20 17:36:40,941 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1553265668] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-20 17:36:40,941 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1667433993] [2024-11-20 17:36:40,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 17:36:40,942 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 17:36:40,942 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-20 17:36:40,944 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) [2024-11-20 17:36:40,945 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-20 17:36:41,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 17:36:41,035 INFO L255 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-11-20 17:36:41,036 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-20 17:36:41,045 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 17:36:41,047 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-20 17:36:41,065 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 17:36:41,065 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1667433993] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-20 17:36:41,065 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-20 17:36:41,066 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2024-11-20 17:36:41,066 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [720034151] [2024-11-20 17:36:41,066 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-20 17:36:41,066 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-20 17:36:41,066 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 17:36:41,067 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-20 17:36:41,067 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-11-20 17:36:41,067 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 87 out of 204 [2024-11-20 17:36:41,069 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 164 places, 166 transitions, 358 flow. Second operand has 7 states, 7 states have (on average 88.28571428571429) internal successors, (618), 7 states have internal predecessors, (618), 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) [2024-11-20 17:36:41,069 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 17:36:41,069 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 87 of 204 [2024-11-20 17:36:41,069 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 17:36:45,379 INFO L124 PetriNetUnfolderBase]: 27581/60840 cut-off events. [2024-11-20 17:36:45,380 INFO L125 PetriNetUnfolderBase]: For 200/205 co-relation queries the response was YES. [2024-11-20 17:36:45,531 INFO L83 FinitePrefix]: Finished finitePrefix Result has 100913 conditions, 60840 events. 27581/60840 cut-off events. For 200/205 co-relation queries the response was YES. Maximal size of possible extension queue 1685. Compared 679806 event pairs, 24192 based on Foata normal form. 0/52636 useless extension candidates. Maximal degree in co-relation 100900. Up to 39942 conditions per place. [2024-11-20 17:36:45,972 INFO L140 encePairwiseOnDemand]: 201/204 looper letters, 77 selfloop transitions, 5 changer transitions 0/169 dead transitions. [2024-11-20 17:36:45,972 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 169 places, 169 transitions, 534 flow [2024-11-20 17:36:45,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-20 17:36:45,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-20 17:36:45,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 607 transitions. [2024-11-20 17:36:45,977 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4959150326797386 [2024-11-20 17:36:45,977 INFO L175 Difference]: Start difference. First operand has 164 places, 166 transitions, 358 flow. Second operand 6 states and 607 transitions. [2024-11-20 17:36:45,977 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 169 places, 169 transitions, 534 flow [2024-11-20 17:36:45,980 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 168 places, 169 transitions, 530 flow, removed 1 selfloop flow, removed 1 redundant places. [2024-11-20 17:36:45,982 INFO L231 Difference]: Finished difference. Result has 171 places, 169 transitions, 390 flow [2024-11-20 17:36:45,982 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=204, PETRI_DIFFERENCE_MINUEND_FLOW=354, PETRI_DIFFERENCE_MINUEND_PLACES=163, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=166, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=163, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=390, PETRI_PLACES=171, PETRI_TRANSITIONS=169} [2024-11-20 17:36:45,983 INFO L277 CegarLoopForPetriNet]: 164 programPoint places, 7 predicate places. [2024-11-20 17:36:45,984 INFO L471 AbstractCegarLoop]: Abstraction has has 171 places, 169 transitions, 390 flow [2024-11-20 17:36:45,985 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 88.28571428571429) internal successors, (618), 7 states have internal predecessors, (618), 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) [2024-11-20 17:36:45,985 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 17:36:45,985 INFO L204 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1, 1] [2024-11-20 17:36:45,994 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-11-20 17:36:46,186 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 17:36:46,186 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 47 more)] === [2024-11-20 17:36:46,187 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 17:36:46,187 INFO L85 PathProgramCache]: Analyzing trace with hash 384423434, now seen corresponding path program 2 times [2024-11-20 17:36:46,187 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 17:36:46,187 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1090805211] [2024-11-20 17:36:46,187 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 17:36:46,187 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 17:36:46,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 17:36:46,249 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-11-20 17:36:46,250 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 17:36:46,250 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1090805211] [2024-11-20 17:36:46,250 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1090805211] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-20 17:36:46,251 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-20 17:36:46,251 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-20 17:36:46,251 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [129721256] [2024-11-20 17:36:46,251 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-20 17:36:46,252 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-20 17:36:46,252 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 17:36:46,252 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-20 17:36:46,252 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-20 17:36:46,287 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 83 out of 204 [2024-11-20 17:36:46,288 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 171 places, 169 transitions, 390 flow. Second operand has 3 states, 3 states have (on average 84.66666666666667) internal successors, (254), 3 states have internal predecessors, (254), 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) [2024-11-20 17:36:46,289 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 17:36:46,289 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 83 of 204 [2024-11-20 17:36:46,289 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 17:36:50,748 INFO L124 PetriNetUnfolderBase]: 29604/64368 cut-off events. [2024-11-20 17:36:50,748 INFO L125 PetriNetUnfolderBase]: For 190/190 co-relation queries the response was YES. [2024-11-20 17:36:50,910 INFO L83 FinitePrefix]: Finished finitePrefix Result has 107514 conditions, 64368 events. 29604/64368 cut-off events. For 190/190 co-relation queries the response was YES. Maximal size of possible extension queue 1770. Compared 719455 event pairs, 24171 based on Foata normal form. 0/55924 useless extension candidates. Maximal degree in co-relation 107479. Up to 39895 conditions per place. [2024-11-20 17:36:51,177 INFO L140 encePairwiseOnDemand]: 200/204 looper letters, 126 selfloop transitions, 2 changer transitions 0/211 dead transitions. [2024-11-20 17:36:51,177 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 171 places, 211 transitions, 730 flow [2024-11-20 17:36:51,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-20 17:36:51,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-20 17:36:51,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 375 transitions. [2024-11-20 17:36:51,179 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6127450980392157 [2024-11-20 17:36:51,179 INFO L175 Difference]: Start difference. First operand has 171 places, 169 transitions, 390 flow. Second operand 3 states and 375 transitions. [2024-11-20 17:36:51,179 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 171 places, 211 transitions, 730 flow [2024-11-20 17:36:51,185 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 170 places, 211 transitions, 716 flow, removed 6 selfloop flow, removed 1 redundant places. [2024-11-20 17:36:51,187 INFO L231 Difference]: Finished difference. Result has 170 places, 167 transitions, 376 flow [2024-11-20 17:36:51,189 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=204, PETRI_DIFFERENCE_MINUEND_FLOW=372, PETRI_DIFFERENCE_MINUEND_PLACES=168, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=167, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=165, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=376, PETRI_PLACES=170, PETRI_TRANSITIONS=167} [2024-11-20 17:36:51,190 INFO L277 CegarLoopForPetriNet]: 164 programPoint places, 6 predicate places. [2024-11-20 17:36:51,191 INFO L471 AbstractCegarLoop]: Abstraction has has 170 places, 167 transitions, 376 flow [2024-11-20 17:36:51,191 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 84.66666666666667) internal successors, (254), 3 states have internal predecessors, (254), 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) [2024-11-20 17:36:51,192 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 17:36:51,192 INFO L204 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1, 1] [2024-11-20 17:36:51,192 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-11-20 17:36:51,192 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 47 more)] === [2024-11-20 17:36:51,192 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 17:36:51,193 INFO L85 PathProgramCache]: Analyzing trace with hash 384423435, now seen corresponding path program 1 times [2024-11-20 17:36:51,193 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 17:36:51,193 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [655795710] [2024-11-20 17:36:51,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 17:36:51,193 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 17:36:51,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 17:36:51,274 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 17:36:51,275 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 17:36:51,275 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [655795710] [2024-11-20 17:36:51,275 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [655795710] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-20 17:36:51,275 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [187852846] [2024-11-20 17:36:51,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 17:36:51,275 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 17:36:51,276 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-20 17:36:51,279 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) [2024-11-20 17:36:51,282 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-20 17:36:51,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 17:36:51,373 INFO L255 TraceCheckSpWp]: Trace formula consists of 215 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-11-20 17:36:51,374 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-20 17:36:51,394 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 17:36:51,395 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-20 17:36:51,450 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 17:36:51,451 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [187852846] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-20 17:36:51,451 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-20 17:36:51,451 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2024-11-20 17:36:51,452 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1119962904] [2024-11-20 17:36:51,452 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-20 17:36:51,452 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-11-20 17:36:51,452 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 17:36:51,453 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-11-20 17:36:51,453 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2024-11-20 17:36:51,454 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 87 out of 204 [2024-11-20 17:36:51,458 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 170 places, 167 transitions, 376 flow. Second operand has 13 states, 13 states have (on average 88.15384615384616) internal successors, (1146), 13 states have internal predecessors, (1146), 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) [2024-11-20 17:36:51,458 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 17:36:51,458 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 87 of 204 [2024-11-20 17:36:51,458 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 17:36:55,846 INFO L124 PetriNetUnfolderBase]: 27581/60830 cut-off events. [2024-11-20 17:36:55,847 INFO L125 PetriNetUnfolderBase]: For 765/770 co-relation queries the response was YES. [2024-11-20 17:36:56,067 INFO L83 FinitePrefix]: Finished finitePrefix Result has 101458 conditions, 60830 events. 27581/60830 cut-off events. For 765/770 co-relation queries the response was YES. Maximal size of possible extension queue 1685. Compared 679501 event pairs, 24192 based on Foata normal form. 6/52649 useless extension candidates. Maximal degree in co-relation 101405. Up to 39942 conditions per place. [2024-11-20 17:36:56,240 INFO L140 encePairwiseOnDemand]: 201/204 looper letters, 77 selfloop transitions, 11 changer transitions 0/173 dead transitions. [2024-11-20 17:36:56,240 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 181 places, 173 transitions, 588 flow [2024-11-20 17:36:56,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-11-20 17:36:56,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-11-20 17:36:56,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 1138 transitions. [2024-11-20 17:36:56,244 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.46486928104575165 [2024-11-20 17:36:56,244 INFO L175 Difference]: Start difference. First operand has 170 places, 167 transitions, 376 flow. Second operand 12 states and 1138 transitions. [2024-11-20 17:36:56,247 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 181 places, 173 transitions, 588 flow [2024-11-20 17:36:56,252 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 179 places, 173 transitions, 584 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-20 17:36:56,254 INFO L231 Difference]: Finished difference. Result has 185 places, 173 transitions, 456 flow [2024-11-20 17:36:56,254 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=204, PETRI_DIFFERENCE_MINUEND_FLOW=372, PETRI_DIFFERENCE_MINUEND_PLACES=168, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=167, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=161, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=456, PETRI_PLACES=185, PETRI_TRANSITIONS=173} [2024-11-20 17:36:56,255 INFO L277 CegarLoopForPetriNet]: 164 programPoint places, 21 predicate places. [2024-11-20 17:36:56,255 INFO L471 AbstractCegarLoop]: Abstraction has has 185 places, 173 transitions, 456 flow [2024-11-20 17:36:56,256 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 88.15384615384616) internal successors, (1146), 13 states have internal predecessors, (1146), 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) [2024-11-20 17:36:56,256 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 17:36:56,256 INFO L204 CegarLoopForPetriNet]: trace histogram [10, 1, 1, 1, 1] [2024-11-20 17:36:56,265 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-11-20 17:36:56,460 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 17:36:56,460 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 47 more)] === [2024-11-20 17:36:56,461 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 17:36:56,461 INFO L85 PathProgramCache]: Analyzing trace with hash -679053557, now seen corresponding path program 2 times [2024-11-20 17:36:56,461 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 17:36:56,461 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [649444089] [2024-11-20 17:36:56,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 17:36:56,461 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 17:36:56,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 17:36:56,636 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2024-11-20 17:36:56,636 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 17:36:56,636 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [649444089] [2024-11-20 17:36:56,637 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [649444089] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-20 17:36:56,637 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-20 17:36:56,637 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-20 17:36:56,637 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1640380642] [2024-11-20 17:36:56,637 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-20 17:36:56,638 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-20 17:36:56,638 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 17:36:56,638 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-20 17:36:56,638 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-20 17:36:56,670 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 86 out of 204 [2024-11-20 17:36:56,671 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 185 places, 173 transitions, 456 flow. Second operand has 3 states, 3 states have (on average 87.66666666666667) internal successors, (263), 3 states have internal predecessors, (263), 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) [2024-11-20 17:36:56,671 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 17:36:56,671 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 86 of 204 [2024-11-20 17:36:56,671 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 17:37:01,445 INFO L124 PetriNetUnfolderBase]: 27992/60918 cut-off events. [2024-11-20 17:37:01,446 INFO L125 PetriNetUnfolderBase]: For 280/324 co-relation queries the response was YES. [2024-11-20 17:37:01,771 INFO L83 FinitePrefix]: Finished finitePrefix Result has 102013 conditions, 60918 events. 27992/60918 cut-off events. For 280/324 co-relation queries the response was YES. Maximal size of possible extension queue 1737. Compared 681222 event pairs, 12096 based on Foata normal form. 1/52872 useless extension candidates. Maximal degree in co-relation 101936. Up to 40894 conditions per place. [2024-11-20 17:37:01,983 INFO L140 encePairwiseOnDemand]: 200/204 looper letters, 111 selfloop transitions, 2 changer transitions 0/197 dead transitions. [2024-11-20 17:37:01,983 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 187 places, 197 transitions, 730 flow [2024-11-20 17:37:01,984 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-20 17:37:01,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-20 17:37:01,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 363 transitions. [2024-11-20 17:37:01,985 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5931372549019608 [2024-11-20 17:37:01,985 INFO L175 Difference]: Start difference. First operand has 185 places, 173 transitions, 456 flow. Second operand 3 states and 363 transitions. [2024-11-20 17:37:01,985 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 187 places, 197 transitions, 730 flow [2024-11-20 17:37:01,987 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 182 places, 197 transitions, 682 flow, removed 19 selfloop flow, removed 5 redundant places. [2024-11-20 17:37:01,989 INFO L231 Difference]: Finished difference. Result has 183 places, 174 transitions, 422 flow [2024-11-20 17:37:01,989 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=204, PETRI_DIFFERENCE_MINUEND_FLOW=408, PETRI_DIFFERENCE_MINUEND_PLACES=180, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=173, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=171, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=422, PETRI_PLACES=183, PETRI_TRANSITIONS=174} [2024-11-20 17:37:01,989 INFO L277 CegarLoopForPetriNet]: 164 programPoint places, 19 predicate places. [2024-11-20 17:37:01,989 INFO L471 AbstractCegarLoop]: Abstraction has has 183 places, 174 transitions, 422 flow [2024-11-20 17:37:01,990 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 87.66666666666667) internal successors, (263), 3 states have internal predecessors, (263), 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) [2024-11-20 17:37:01,990 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 17:37:01,990 INFO L204 CegarLoopForPetriNet]: trace histogram [10, 2, 1, 1, 1, 1, 1, 1] [2024-11-20 17:37:01,990 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-11-20 17:37:01,990 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 47 more)] === [2024-11-20 17:37:01,990 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 17:37:01,990 INFO L85 PathProgramCache]: Analyzing trace with hash 872746160, now seen corresponding path program 1 times [2024-11-20 17:37:01,990 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 17:37:01,991 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1306667005] [2024-11-20 17:37:01,991 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 17:37:01,991 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 17:37:02,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 17:37:02,134 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2024-11-20 17:37:02,135 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 17:37:02,135 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1306667005] [2024-11-20 17:37:02,135 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1306667005] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-20 17:37:02,135 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1350766430] [2024-11-20 17:37:02,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 17:37:02,135 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 17:37:02,136 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-20 17:37:02,138 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) [2024-11-20 17:37:02,139 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-11-20 17:37:02,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 17:37:02,246 INFO L255 TraceCheckSpWp]: Trace formula consists of 278 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-11-20 17:37:02,247 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-20 17:37:02,261 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2024-11-20 17:37:02,321 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2024-11-20 17:37:02,321 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-20 17:37:02,380 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2024-11-20 17:37:02,380 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1350766430] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-20 17:37:02,380 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-20 17:37:02,380 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3, 3] total 8 [2024-11-20 17:37:02,381 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [556589398] [2024-11-20 17:37:02,381 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-20 17:37:02,381 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-11-20 17:37:02,381 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 17:37:02,382 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-11-20 17:37:02,382 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2024-11-20 17:37:02,858 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 85 out of 204 [2024-11-20 17:37:02,859 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 183 places, 174 transitions, 422 flow. Second operand has 9 states, 9 states have (on average 87.55555555555556) internal successors, (788), 9 states have internal predecessors, (788), 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) [2024-11-20 17:37:02,860 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 17:37:02,860 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 85 of 204 [2024-11-20 17:37:02,860 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 17:37:03,388 INFO L124 PetriNetUnfolderBase]: 3559/6862 cut-off events. [2024-11-20 17:37:03,388 INFO L125 PetriNetUnfolderBase]: For 1141/1141 co-relation queries the response was YES. [2024-11-20 17:37:03,405 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13059 conditions, 6862 events. 3559/6862 cut-off events. For 1141/1141 co-relation queries the response was YES. Maximal size of possible extension queue 230. Compared 51767 event pairs, 408 based on Foata normal form. 1012/7214 useless extension candidates. Maximal degree in co-relation 13005. Up to 4389 conditions per place. [2024-11-20 17:37:03,422 INFO L140 encePairwiseOnDemand]: 200/204 looper letters, 130 selfloop transitions, 3 changer transitions 0/186 dead transitions. [2024-11-20 17:37:03,422 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 133 places, 186 transitions, 702 flow [2024-11-20 17:37:03,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-20 17:37:03,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-20 17:37:03,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 552 transitions. [2024-11-20 17:37:03,425 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5411764705882353 [2024-11-20 17:37:03,425 INFO L175 Difference]: Start difference. First operand has 183 places, 174 transitions, 422 flow. Second operand 5 states and 552 transitions. [2024-11-20 17:37:03,425 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 133 places, 186 transitions, 702 flow [2024-11-20 17:37:03,435 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 132 places, 186 transitions, 700 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-20 17:37:03,438 INFO L231 Difference]: Finished difference. Result has 132 places, 116 transitions, 300 flow [2024-11-20 17:37:03,438 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=204, PETRI_DIFFERENCE_MINUEND_FLOW=294, PETRI_DIFFERENCE_MINUEND_PLACES=128, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=116, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=113, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=300, PETRI_PLACES=132, PETRI_TRANSITIONS=116} [2024-11-20 17:37:03,439 INFO L277 CegarLoopForPetriNet]: 164 programPoint places, -32 predicate places. [2024-11-20 17:37:03,439 INFO L471 AbstractCegarLoop]: Abstraction has has 132 places, 116 transitions, 300 flow [2024-11-20 17:37:03,440 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 87.55555555555556) internal successors, (788), 9 states have internal predecessors, (788), 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) [2024-11-20 17:37:03,440 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 17:37:03,440 INFO L204 CegarLoopForPetriNet]: trace histogram [10, 3, 3, 2, 1, 1, 1, 1, 1] [2024-11-20 17:37:03,448 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2024-11-20 17:37:03,640 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 17:37:03,641 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 47 more)] === [2024-11-20 17:37:03,641 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 17:37:03,642 INFO L85 PathProgramCache]: Analyzing trace with hash 1787874941, now seen corresponding path program 1 times [2024-11-20 17:37:03,642 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 17:37:03,642 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [786335803] [2024-11-20 17:37:03,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 17:37:03,642 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 17:37:03,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-11-20 17:37:03,673 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2024-11-20 17:37:03,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-11-20 17:37:03,713 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2024-11-20 17:37:03,713 INFO L325 BasicCegarLoop]: Counterexample is feasible [2024-11-20 17:37:03,713 INFO L782 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (49 of 50 remaining) [2024-11-20 17:37:03,713 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (48 of 50 remaining) [2024-11-20 17:37:03,713 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (47 of 50 remaining) [2024-11-20 17:37:03,714 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (46 of 50 remaining) [2024-11-20 17:37:03,714 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr14REQUIRES_VIOLATIONMEMORY_DEREFERENCE (45 of 50 remaining) [2024-11-20 17:37:03,714 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr15ASSERT_VIOLATIONMEMORY_LEAK (44 of 50 remaining) [2024-11-20 17:37:03,714 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE (43 of 50 remaining) [2024-11-20 17:37:03,714 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE (42 of 50 remaining) [2024-11-20 17:37:03,714 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (41 of 50 remaining) [2024-11-20 17:37:03,714 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (40 of 50 remaining) [2024-11-20 17:37:03,714 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (39 of 50 remaining) [2024-11-20 17:37:03,714 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (38 of 50 remaining) [2024-11-20 17:37:03,715 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (37 of 50 remaining) [2024-11-20 17:37:03,715 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (36 of 50 remaining) [2024-11-20 17:37:03,715 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (35 of 50 remaining) [2024-11-20 17:37:03,715 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (34 of 50 remaining) [2024-11-20 17:37:03,715 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK (33 of 50 remaining) [2024-11-20 17:37:03,716 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (32 of 50 remaining) [2024-11-20 17:37:03,716 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (31 of 50 remaining) [2024-11-20 17:37:03,716 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (30 of 50 remaining) [2024-11-20 17:37:03,716 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (29 of 50 remaining) [2024-11-20 17:37:03,716 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (28 of 50 remaining) [2024-11-20 17:37:03,716 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (27 of 50 remaining) [2024-11-20 17:37:03,716 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (26 of 50 remaining) [2024-11-20 17:37:03,716 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (25 of 50 remaining) [2024-11-20 17:37:03,716 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (24 of 50 remaining) [2024-11-20 17:37:03,716 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (23 of 50 remaining) [2024-11-20 17:37:03,717 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr10ASSERT_VIOLATIONMEMORY_LEAK (22 of 50 remaining) [2024-11-20 17:37:03,717 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (21 of 50 remaining) [2024-11-20 17:37:03,717 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (20 of 50 remaining) [2024-11-20 17:37:03,717 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (19 of 50 remaining) [2024-11-20 17:37:03,717 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (18 of 50 remaining) [2024-11-20 17:37:03,717 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (17 of 50 remaining) [2024-11-20 17:37:03,717 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (16 of 50 remaining) [2024-11-20 17:37:03,717 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (15 of 50 remaining) [2024-11-20 17:37:03,718 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (14 of 50 remaining) [2024-11-20 17:37:03,718 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (13 of 50 remaining) [2024-11-20 17:37:03,718 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (12 of 50 remaining) [2024-11-20 17:37:03,718 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr10ASSERT_VIOLATIONMEMORY_LEAK (11 of 50 remaining) [2024-11-20 17:37:03,718 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (10 of 50 remaining) [2024-11-20 17:37:03,718 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (9 of 50 remaining) [2024-11-20 17:37:03,718 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (8 of 50 remaining) [2024-11-20 17:37:03,718 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (7 of 50 remaining) [2024-11-20 17:37:03,718 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (6 of 50 remaining) [2024-11-20 17:37:03,718 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 50 remaining) [2024-11-20 17:37:03,718 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 50 remaining) [2024-11-20 17:37:03,719 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (3 of 50 remaining) [2024-11-20 17:37:03,719 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (2 of 50 remaining) [2024-11-20 17:37:03,719 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (1 of 50 remaining) [2024-11-20 17:37:03,719 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr10ASSERT_VIOLATIONMEMORY_LEAK (0 of 50 remaining) [2024-11-20 17:37:03,719 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-11-20 17:37:03,719 INFO L407 BasicCegarLoop]: Path program histogram: [2, 2, 1, 1, 1] [2024-11-20 17:37:03,720 WARN L244 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2024-11-20 17:37:03,720 INFO L489 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2024-11-20 17:37:03,763 INFO L143 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2024-11-20 17:37:03,765 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 214 places, 267 transitions, 561 flow [2024-11-20 17:37:03,809 INFO L124 PetriNetUnfolderBase]: 107/528 cut-off events. [2024-11-20 17:37:03,809 INFO L125 PetriNetUnfolderBase]: For 19/19 co-relation queries the response was YES. [2024-11-20 17:37:03,815 INFO L83 FinitePrefix]: Finished finitePrefix Result has 553 conditions, 528 events. 107/528 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 31. Compared 3258 event pairs, 1 based on Foata normal form. 0/308 useless extension candidates. Maximal degree in co-relation 369. Up to 16 conditions per place. [2024-11-20 17:37:03,815 INFO L82 GeneralOperation]: Start removeDead. Operand has 214 places, 267 transitions, 561 flow [2024-11-20 17:37:03,823 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 214 places, 267 transitions, 561 flow [2024-11-20 17:37:03,824 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-20 17:37:03,825 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;@22126819, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-20 17:37:03,825 INFO L334 AbstractCegarLoop]: Starting to check reachability of 61 error locations. [2024-11-20 17:37:03,827 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-11-20 17:37:03,827 INFO L124 PetriNetUnfolderBase]: 1/6 cut-off events. [2024-11-20 17:37:03,827 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-11-20 17:37:03,827 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 17:37:03,827 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2024-11-20 17:37:03,828 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 58 more)] === [2024-11-20 17:37:03,828 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 17:37:03,828 INFO L85 PathProgramCache]: Analyzing trace with hash 36858570, now seen corresponding path program 1 times [2024-11-20 17:37:03,828 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 17:37:03,828 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [488567731] [2024-11-20 17:37:03,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 17:37:03,828 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 17:37:03,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 17:37:03,858 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 17:37:03,858 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 17:37:03,858 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [488567731] [2024-11-20 17:37:03,859 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [488567731] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-20 17:37:03,859 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-20 17:37:03,859 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-20 17:37:03,859 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [200942713] [2024-11-20 17:37:03,859 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-20 17:37:03,859 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-20 17:37:03,860 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 17:37:03,860 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-20 17:37:03,861 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-20 17:37:03,861 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 113 out of 267 [2024-11-20 17:37:03,862 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 214 places, 267 transitions, 561 flow. Second operand has 3 states, 3 states have (on average 114.0) internal successors, (342), 3 states have internal predecessors, (342), 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) [2024-11-20 17:37:03,862 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 17:37:03,862 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 113 of 267 [2024-11-20 17:37:03,862 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand