./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/goblint-regression/28-race_reach_42-trylock2_racefree.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 8be7027f Calling Ultimate with: /root/.sdkman/candidates/java/11.0.12-open/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i ../sv-benchmarks/c/goblint-regression/28-race_reach_42-trylock2_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 844ba080c7d33529db727776ee230d62edb7b62a6350a8061572438c458d73d3 --- Real Ultimate output --- This is Ultimate 0.2.5-wip.dk.perfect-tracechecks-8be7027-m [2024-11-12 16:18:50,002 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-12 16:18:50,071 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2024-11-12 16:18:50,078 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-12 16:18:50,082 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-12 16:18:50,107 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-12 16:18:50,107 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-12 16:18:50,108 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-12 16:18:50,108 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-12 16:18:50,108 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-12 16:18:50,109 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-12 16:18:50,109 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-12 16:18:50,109 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-12 16:18:50,109 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-12 16:18:50,110 INFO L153 SettingsManager]: * Use SBE=true [2024-11-12 16:18:50,110 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-12 16:18:50,110 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-12 16:18:50,111 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-12 16:18:50,111 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-12 16:18:50,111 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-12 16:18:50,115 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2024-11-12 16:18:50,116 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2024-11-12 16:18:50,116 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2024-11-12 16:18:50,116 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-12 16:18:50,116 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-11-12 16:18:50,116 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-12 16:18:50,116 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2024-11-12 16:18:50,117 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-12 16:18:50,117 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-12 16:18:50,117 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-12 16:18:50,117 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-12 16:18:50,117 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-12 16:18:50,118 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-12 16:18:50,118 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-12 16:18:50,118 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-12 16:18:50,118 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-12 16:18:50,118 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-12 16:18:50,118 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-12 16:18:50,119 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-12 16:18:50,119 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-12 16:18:50,119 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-12 16:18:50,123 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-12 16:18:50,123 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 844ba080c7d33529db727776ee230d62edb7b62a6350a8061572438c458d73d3 [2024-11-12 16:18:50,349 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-12 16:18:50,366 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-12 16:18:50,368 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-12 16:18:50,369 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-12 16:18:50,369 INFO L274 PluginConnector]: CDTParser initialized [2024-11-12 16:18:50,370 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/goblint-regression/28-race_reach_42-trylock2_racefree.i [2024-11-12 16:18:51,676 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-12 16:18:51,869 INFO L384 CDTParser]: Found 1 translation units. [2024-11-12 16:18:51,870 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/goblint-regression/28-race_reach_42-trylock2_racefree.i [2024-11-12 16:18:51,881 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/85a70cbe7/8b086ea612824cdcb59ad115501e1ce0/FLAG15cd3c8e6 [2024-11-12 16:18:51,892 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/85a70cbe7/8b086ea612824cdcb59ad115501e1ce0 [2024-11-12 16:18:51,894 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-12 16:18:51,895 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-12 16:18:51,896 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-12 16:18:51,896 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-12 16:18:51,901 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-12 16:18:51,901 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 04:18:51" (1/1) ... [2024-11-12 16:18:51,902 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@77a6904a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 04:18:51, skipping insertion in model container [2024-11-12 16:18:51,902 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 04:18:51" (1/1) ... [2024-11-12 16:18:51,930 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-12 16:18:52,174 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-12 16:18:52,200 INFO L200 MainTranslator]: Completed pre-run [2024-11-12 16:18:52,266 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-12 16:18:52,299 INFO L204 MainTranslator]: Completed translation [2024-11-12 16:18:52,300 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 04:18:52 WrapperNode [2024-11-12 16:18:52,300 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-12 16:18:52,301 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-12 16:18:52,301 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-12 16:18:52,301 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-12 16:18:52,306 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 04:18:52" (1/1) ... [2024-11-12 16:18:52,318 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 04:18:52" (1/1) ... [2024-11-12 16:18:52,345 INFO L138 Inliner]: procedures = 172, calls = 61, calls flagged for inlining = 7, calls inlined = 10, statements flattened = 157 [2024-11-12 16:18:52,346 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-12 16:18:52,347 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-12 16:18:52,347 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-12 16:18:52,347 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-12 16:18:52,357 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 04:18:52" (1/1) ... [2024-11-12 16:18:52,357 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 04:18:52" (1/1) ... [2024-11-12 16:18:52,361 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 04:18:52" (1/1) ... [2024-11-12 16:18:52,374 INFO L175 MemorySlicer]: Split 19 memory accesses to 5 slices as follows [2, 5, 5, 5, 2]. 26 percent of accesses are in the largest equivalence class. The 17 initializations are split as follows [2, 5, 5, 5, 0]. The 1 writes are split as follows [0, 0, 0, 0, 1]. [2024-11-12 16:18:52,375 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 04:18:52" (1/1) ... [2024-11-12 16:18:52,375 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 04:18:52" (1/1) ... [2024-11-12 16:18:52,383 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 04:18:52" (1/1) ... [2024-11-12 16:18:52,386 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 04:18:52" (1/1) ... [2024-11-12 16:18:52,388 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 04:18:52" (1/1) ... [2024-11-12 16:18:52,389 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 04:18:52" (1/1) ... [2024-11-12 16:18:52,406 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-12 16:18:52,407 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-12 16:18:52,407 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-12 16:18:52,407 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-12 16:18:52,408 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 04:18:52" (1/1) ... [2024-11-12 16:18:52,416 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-12 16:18:52,429 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-12 16:18:52,447 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-11-12 16:18:52,449 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-11-12 16:18:52,510 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-11-12 16:18:52,510 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-11-12 16:18:52,510 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2024-11-12 16:18:52,510 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#3 [2024-11-12 16:18:52,510 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#4 [2024-11-12 16:18:52,511 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-11-12 16:18:52,511 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-11-12 16:18:52,511 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2024-11-12 16:18:52,511 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2024-11-12 16:18:52,511 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#4 [2024-11-12 16:18:52,511 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2024-11-12 16:18:52,512 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-12 16:18:52,512 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-11-12 16:18:52,512 INFO L130 BoogieDeclarations]: Found specification of procedure t_fun [2024-11-12 16:18:52,512 INFO L138 BoogieDeclarations]: Found implementation of procedure t_fun [2024-11-12 16:18:52,512 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-11-12 16:18:52,512 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexTryLock [2024-11-12 16:18:52,513 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-12 16:18:52,513 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-11-12 16:18:52,513 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-11-12 16:18:52,513 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2024-11-12 16:18:52,513 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#4 [2024-11-12 16:18:52,513 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexUnlock [2024-11-12 16:18:52,514 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-12 16:18:52,514 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-12 16:18:52,515 WARN L207 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2024-11-12 16:18:52,667 INFO L238 CfgBuilder]: Building ICFG [2024-11-12 16:18:52,669 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-12 16:18:52,962 INFO L283 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-11-12 16:18:52,962 INFO L287 CfgBuilder]: Performing block encoding [2024-11-12 16:18:53,134 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-12 16:18:53,136 INFO L316 CfgBuilder]: Removed 23 assume(true) statements. [2024-11-12 16:18:53,136 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 04:18:53 BoogieIcfgContainer [2024-11-12 16:18:53,136 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-12 16:18:53,139 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-12 16:18:53,139 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-12 16:18:53,142 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-12 16:18:53,142 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.11 04:18:51" (1/3) ... [2024-11-12 16:18:53,142 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4d17603a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 04:18:53, skipping insertion in model container [2024-11-12 16:18:53,142 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 04:18:52" (2/3) ... [2024-11-12 16:18:53,143 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4d17603a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 04:18:53, skipping insertion in model container [2024-11-12 16:18:53,143 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 04:18:53" (3/3) ... [2024-11-12 16:18:53,145 INFO L112 eAbstractionObserver]: Analyzing ICFG 28-race_reach_42-trylock2_racefree.i [2024-11-12 16:18:53,159 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-12 16:18:53,159 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 9 error locations. [2024-11-12 16:18:53,159 INFO L489 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-11-12 16:18:53,205 INFO L143 ThreadInstanceAdder]: Constructed 1 joinOtherThreadTransitions. [2024-11-12 16:18:53,235 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 109 places, 137 transitions, 281 flow [2024-11-12 16:18:53,278 INFO L124 PetriNetUnfolderBase]: 49/223 cut-off events. [2024-11-12 16:18:53,279 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2024-11-12 16:18:53,286 INFO L83 FinitePrefix]: Finished finitePrefix Result has 228 conditions, 223 events. 49/223 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 1081 event pairs, 0 based on Foata normal form. 0/153 useless extension candidates. Maximal degree in co-relation 132. Up to 6 conditions per place. [2024-11-12 16:18:53,287 INFO L82 GeneralOperation]: Start removeDead. Operand has 109 places, 137 transitions, 281 flow [2024-11-12 16:18:53,290 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 109 places, 137 transitions, 281 flow [2024-11-12 16:18:53,297 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-12 16:18:53,301 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;@5e030fb7, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-12 16:18:53,301 INFO L334 AbstractCegarLoop]: Starting to check reachability of 10 error locations. [2024-11-12 16:18:53,305 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-11-12 16:18:53,306 INFO L124 PetriNetUnfolderBase]: 0/4 cut-off events. [2024-11-12 16:18:53,306 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-11-12 16:18:53,306 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-12 16:18:53,307 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2024-11-12 16:18:53,307 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK (and 7 more)] === [2024-11-12 16:18:53,311 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 16:18:53,311 INFO L85 PathProgramCache]: Analyzing trace with hash 617243, now seen corresponding path program 1 times [2024-11-12 16:18:53,317 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 16:18:53,318 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2067608912] [2024-11-12 16:18:53,318 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 16:18:53,318 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 16:18:53,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 16:18:53,546 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-12 16:18:53,546 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 16:18:53,547 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2067608912] [2024-11-12 16:18:53,547 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2067608912] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-12 16:18:53,547 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-12 16:18:53,547 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-11-12 16:18:53,548 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1837658078] [2024-11-12 16:18:53,549 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-12 16:18:53,555 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-12 16:18:53,558 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 16:18:53,579 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-12 16:18:53,580 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-12 16:18:53,597 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 45 out of 137 [2024-11-12 16:18:53,599 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 109 places, 137 transitions, 281 flow. Second operand has 3 states, 3 states have (on average 46.0) internal successors, (138), 3 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-12 16:18:53,599 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-12 16:18:53,599 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 45 of 137 [2024-11-12 16:18:53,600 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-12 16:18:53,899 INFO L124 PetriNetUnfolderBase]: 632/1936 cut-off events. [2024-11-12 16:18:53,899 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2024-11-12 16:18:53,903 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3273 conditions, 1936 events. 632/1936 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 44. Compared 12517 event pairs, 578 based on Foata normal form. 513/2386 useless extension candidates. Maximal degree in co-relation 3158. Up to 1259 conditions per place. [2024-11-12 16:18:53,910 INFO L140 encePairwiseOnDemand]: 104/137 looper letters, 71 selfloop transitions, 2 changer transitions 1/119 dead transitions. [2024-11-12 16:18:53,910 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 105 places, 119 transitions, 393 flow [2024-11-12 16:18:53,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-12 16:18:53,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-12 16:18:53,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 252 transitions. [2024-11-12 16:18:53,922 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6131386861313869 [2024-11-12 16:18:53,924 INFO L175 Difference]: Start difference. First operand has 109 places, 137 transitions, 281 flow. Second operand 3 states and 252 transitions. [2024-11-12 16:18:53,925 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 105 places, 119 transitions, 393 flow [2024-11-12 16:18:53,928 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 105 places, 119 transitions, 393 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-11-12 16:18:53,930 INFO L231 Difference]: Finished difference. Result has 105 places, 101 transitions, 213 flow [2024-11-12 16:18:53,932 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=137, PETRI_DIFFERENCE_MINUEND_FLOW=211, PETRI_DIFFERENCE_MINUEND_PLACES=103, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=102, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=100, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=213, PETRI_PLACES=105, PETRI_TRANSITIONS=101} [2024-11-12 16:18:53,934 INFO L279 CegarLoopForPetriNet]: 109 programPoint places, -4 predicate places. [2024-11-12 16:18:53,934 INFO L471 AbstractCegarLoop]: Abstraction has has 105 places, 101 transitions, 213 flow [2024-11-12 16:18:53,934 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 46.0) internal successors, (138), 3 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-12 16:18:53,935 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-12 16:18:53,935 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2024-11-12 16:18:53,935 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-12 16:18:53,935 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK (and 7 more)] === [2024-11-12 16:18:53,936 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 16:18:53,936 INFO L85 PathProgramCache]: Analyzing trace with hash 617244, now seen corresponding path program 1 times [2024-11-12 16:18:53,936 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 16:18:53,936 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [613449823] [2024-11-12 16:18:53,936 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 16:18:53,936 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 16:18:53,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 16:18:54,073 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-12 16:18:54,074 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 16:18:54,074 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [613449823] [2024-11-12 16:18:54,074 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [613449823] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-12 16:18:54,074 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-12 16:18:54,074 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-11-12 16:18:54,075 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [231503493] [2024-11-12 16:18:54,075 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-12 16:18:54,076 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-12 16:18:54,077 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 16:18:54,078 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-12 16:18:54,078 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-12 16:18:54,090 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 48 out of 137 [2024-11-12 16:18:54,092 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 105 places, 101 transitions, 213 flow. Second operand has 3 states, 3 states have (on average 49.0) internal successors, (147), 3 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-12 16:18:54,092 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-12 16:18:54,092 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 48 of 137 [2024-11-12 16:18:54,092 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-12 16:18:54,314 INFO L124 PetriNetUnfolderBase]: 596/1804 cut-off events. [2024-11-12 16:18:54,314 INFO L125 PetriNetUnfolderBase]: For 4/4 co-relation queries the response was YES. [2024-11-12 16:18:54,317 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3056 conditions, 1804 events. 596/1804 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 43. Compared 11379 event pairs, 528 based on Foata normal form. 1/1728 useless extension candidates. Maximal degree in co-relation 3027. Up to 1206 conditions per place. [2024-11-12 16:18:54,321 INFO L140 encePairwiseOnDemand]: 133/137 looper letters, 71 selfloop transitions, 2 changer transitions 0/119 dead transitions. [2024-11-12 16:18:54,321 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 106 places, 119 transitions, 395 flow [2024-11-12 16:18:54,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-12 16:18:54,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-12 16:18:54,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 219 transitions. [2024-11-12 16:18:54,323 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5328467153284672 [2024-11-12 16:18:54,323 INFO L175 Difference]: Start difference. First operand has 105 places, 101 transitions, 213 flow. Second operand 3 states and 219 transitions. [2024-11-12 16:18:54,323 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 106 places, 119 transitions, 395 flow [2024-11-12 16:18:54,324 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 104 places, 119 transitions, 391 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-12 16:18:54,327 INFO L231 Difference]: Finished difference. Result has 105 places, 101 transitions, 219 flow [2024-11-12 16:18:54,328 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=137, PETRI_DIFFERENCE_MINUEND_FLOW=209, PETRI_DIFFERENCE_MINUEND_PLACES=102, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=101, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=99, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=219, PETRI_PLACES=105, PETRI_TRANSITIONS=101} [2024-11-12 16:18:54,328 INFO L279 CegarLoopForPetriNet]: 109 programPoint places, -4 predicate places. [2024-11-12 16:18:54,328 INFO L471 AbstractCegarLoop]: Abstraction has has 105 places, 101 transitions, 219 flow [2024-11-12 16:18:54,329 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 49.0) internal successors, (147), 3 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-12 16:18:54,329 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-12 16:18:54,329 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1] [2024-11-12 16:18:54,330 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-12 16:18:54,330 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK (and 7 more)] === [2024-11-12 16:18:54,331 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 16:18:54,331 INFO L85 PathProgramCache]: Analyzing trace with hash -1172063688, now seen corresponding path program 1 times [2024-11-12 16:18:54,332 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 16:18:54,332 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1649291061] [2024-11-12 16:18:54,332 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 16:18:54,332 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 16:18:54,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 16:18:54,484 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-12 16:18:54,484 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 16:18:54,485 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1649291061] [2024-11-12 16:18:54,485 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1649291061] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-12 16:18:54,485 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-12 16:18:54,486 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-12 16:18:54,486 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1194680541] [2024-11-12 16:18:54,486 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-12 16:18:54,486 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-12 16:18:54,487 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 16:18:54,487 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-12 16:18:54,487 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-12 16:18:54,507 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 47 out of 137 [2024-11-12 16:18:54,507 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 105 places, 101 transitions, 219 flow. Second operand has 5 states, 5 states have (on average 48.4) internal successors, (242), 5 states have internal predecessors, (242), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-12 16:18:54,507 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-12 16:18:54,507 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 47 of 137 [2024-11-12 16:18:54,507 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-12 16:18:54,581 INFO L124 PetriNetUnfolderBase]: 51/184 cut-off events. [2024-11-12 16:18:54,581 INFO L125 PetriNetUnfolderBase]: For 48/48 co-relation queries the response was YES. [2024-11-12 16:18:54,582 INFO L83 FinitePrefix]: Finished finitePrefix Result has 354 conditions, 184 events. 51/184 cut-off events. For 48/48 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 433 event pairs, 32 based on Foata normal form. 36/219 useless extension candidates. Maximal degree in co-relation 335. Up to 105 conditions per place. [2024-11-12 16:18:54,582 INFO L140 encePairwiseOnDemand]: 133/137 looper letters, 39 selfloop transitions, 2 changer transitions 0/58 dead transitions. [2024-11-12 16:18:54,582 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 58 transitions, 208 flow [2024-11-12 16:18:54,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-12 16:18:54,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-12 16:18:54,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 231 transitions. [2024-11-12 16:18:54,585 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4215328467153285 [2024-11-12 16:18:54,585 INFO L175 Difference]: Start difference. First operand has 105 places, 101 transitions, 219 flow. Second operand 4 states and 231 transitions. [2024-11-12 16:18:54,585 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 58 transitions, 208 flow [2024-11-12 16:18:54,585 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 58 transitions, 202 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-11-12 16:18:54,587 INFO L231 Difference]: Finished difference. Result has 45 places, 39 transitions, 86 flow [2024-11-12 16:18:54,587 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=137, PETRI_DIFFERENCE_MINUEND_FLOW=82, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=86, PETRI_PLACES=45, PETRI_TRANSITIONS=39} [2024-11-12 16:18:54,588 INFO L279 CegarLoopForPetriNet]: 109 programPoint places, -64 predicate places. [2024-11-12 16:18:54,588 INFO L471 AbstractCegarLoop]: Abstraction has has 45 places, 39 transitions, 86 flow [2024-11-12 16:18:54,588 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 48.4) internal successors, (242), 5 states have internal predecessors, (242), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-12 16:18:54,588 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-12 16:18:54,588 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1] [2024-11-12 16:18:54,589 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-11-12 16:18:54,589 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK (and 7 more)] === [2024-11-12 16:18:54,589 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 16:18:54,589 INFO L85 PathProgramCache]: Analyzing trace with hash -1974235283, now seen corresponding path program 1 times [2024-11-12 16:18:54,590 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 16:18:54,590 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1812154360] [2024-11-12 16:18:54,590 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 16:18:54,590 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 16:18:54,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-11-12 16:18:54,609 INFO L357 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2024-11-12 16:18:54,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-11-12 16:18:54,636 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2024-11-12 16:18:54,637 INFO L339 BasicCegarLoop]: Counterexample is feasible [2024-11-12 16:18:54,638 INFO L782 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (9 of 10 remaining) [2024-11-12 16:18:54,639 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (8 of 10 remaining) [2024-11-12 16:18:54,639 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (7 of 10 remaining) [2024-11-12 16:18:54,641 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK (6 of 10 remaining) [2024-11-12 16:18:54,641 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3ASSERT_VIOLATIONMEMORY_LEAK (5 of 10 remaining) [2024-11-12 16:18:54,641 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK (4 of 10 remaining) [2024-11-12 16:18:54,641 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (3 of 10 remaining) [2024-11-12 16:18:54,642 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (2 of 10 remaining) [2024-11-12 16:18:54,642 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK (1 of 10 remaining) [2024-11-12 16:18:54,643 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr5ASSERT_VIOLATIONMEMORY_LEAK (0 of 10 remaining) [2024-11-12 16:18:54,643 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-11-12 16:18:54,643 INFO L421 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1] [2024-11-12 16:18:54,644 WARN L244 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2024-11-12 16:18:54,645 INFO L489 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2024-11-12 16:18:54,670 INFO L143 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2024-11-12 16:18:54,672 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 145 places, 184 transitions, 384 flow [2024-11-12 16:18:54,693 INFO L124 PetriNetUnfolderBase]: 81/368 cut-off events. [2024-11-12 16:18:54,694 INFO L125 PetriNetUnfolderBase]: For 6/6 co-relation queries the response was YES. [2024-11-12 16:18:54,695 INFO L83 FinitePrefix]: Finished finitePrefix Result has 380 conditions, 368 events. 81/368 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 2003 event pairs, 0 based on Foata normal form. 0/253 useless extension candidates. Maximal degree in co-relation 227. Up to 9 conditions per place. [2024-11-12 16:18:54,695 INFO L82 GeneralOperation]: Start removeDead. Operand has 145 places, 184 transitions, 384 flow [2024-11-12 16:18:54,698 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 145 places, 184 transitions, 384 flow [2024-11-12 16:18:54,702 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-12 16:18:54,703 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;@5e030fb7, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-12 16:18:54,703 INFO L334 AbstractCegarLoop]: Starting to check reachability of 10 error locations. [2024-11-12 16:18:54,704 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-11-12 16:18:54,704 INFO L124 PetriNetUnfolderBase]: 0/4 cut-off events. [2024-11-12 16:18:54,704 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-11-12 16:18:54,704 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-12 16:18:54,704 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2024-11-12 16:18:54,707 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK (and 7 more)] === [2024-11-12 16:18:54,707 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 16:18:54,707 INFO L85 PathProgramCache]: Analyzing trace with hash 799955, now seen corresponding path program 1 times [2024-11-12 16:18:54,708 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 16:18:54,708 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [906330125] [2024-11-12 16:18:54,708 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 16:18:54,708 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 16:18:54,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 16:18:54,734 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-12 16:18:54,735 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 16:18:54,735 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [906330125] [2024-11-12 16:18:54,735 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [906330125] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-12 16:18:54,735 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-12 16:18:54,735 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-11-12 16:18:54,735 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1879322005] [2024-11-12 16:18:54,735 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-12 16:18:54,736 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-12 16:18:54,736 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 16:18:54,736 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-12 16:18:54,738 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-12 16:18:54,748 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 61 out of 184 [2024-11-12 16:18:54,748 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 145 places, 184 transitions, 384 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) [2024-11-12 16:18:54,748 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-12 16:18:54,748 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 61 of 184 [2024-11-12 16:18:54,748 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-12 16:18:58,775 INFO L124 PetriNetUnfolderBase]: 23415/46871 cut-off events. [2024-11-12 16:18:58,776 INFO L125 PetriNetUnfolderBase]: For 97/97 co-relation queries the response was YES. [2024-11-12 16:18:58,854 INFO L83 FinitePrefix]: Finished finitePrefix Result has 83170 conditions, 46871 events. 23415/46871 cut-off events. For 97/97 co-relation queries the response was YES. Maximal size of possible extension queue 796. Compared 444308 event pairs, 21760 based on Foata normal form. 14736/60095 useless extension candidates. Maximal degree in co-relation 70699. Up to 34187 conditions per place. [2024-11-12 16:18:59,006 INFO L140 encePairwiseOnDemand]: 139/184 looper letters, 107 selfloop transitions, 2 changer transitions 1/171 dead transitions. [2024-11-12 16:18:59,006 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 141 places, 171 transitions, 578 flow [2024-11-12 16:18:59,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-12 16:18:59,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-12 16:18:59,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 360 transitions. [2024-11-12 16:18:59,008 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6521739130434783 [2024-11-12 16:18:59,008 INFO L175 Difference]: Start difference. First operand has 145 places, 184 transitions, 384 flow. Second operand 3 states and 360 transitions. [2024-11-12 16:18:59,008 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 141 places, 171 transitions, 578 flow [2024-11-12 16:18:59,012 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 141 places, 171 transitions, 578 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-11-12 16:18:59,014 INFO L231 Difference]: Finished difference. Result has 141 places, 136 transitions, 292 flow [2024-11-12 16:18:59,014 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=184, PETRI_DIFFERENCE_MINUEND_FLOW=290, PETRI_DIFFERENCE_MINUEND_PLACES=139, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=137, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=135, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=292, PETRI_PLACES=141, PETRI_TRANSITIONS=136} [2024-11-12 16:18:59,015 INFO L279 CegarLoopForPetriNet]: 145 programPoint places, -4 predicate places. [2024-11-12 16:18:59,015 INFO L471 AbstractCegarLoop]: Abstraction has has 141 places, 136 transitions, 292 flow [2024-11-12 16:18:59,015 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) [2024-11-12 16:18:59,015 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-12 16:18:59,015 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2024-11-12 16:18:59,015 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-11-12 16:18:59,016 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK (and 7 more)] === [2024-11-12 16:18:59,016 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 16:18:59,016 INFO L85 PathProgramCache]: Analyzing trace with hash 799956, now seen corresponding path program 1 times [2024-11-12 16:18:59,016 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 16:18:59,016 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [701498265] [2024-11-12 16:18:59,017 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 16:18:59,017 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 16:18:59,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 16:18:59,063 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-12 16:18:59,065 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 16:18:59,065 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [701498265] [2024-11-12 16:18:59,066 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [701498265] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-12 16:18:59,066 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-12 16:18:59,066 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-11-12 16:18:59,066 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [107137680] [2024-11-12 16:18:59,066 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-12 16:18:59,066 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-12 16:18:59,066 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 16:18:59,067 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-12 16:18:59,067 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-12 16:18:59,078 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 64 out of 184 [2024-11-12 16:18:59,079 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 141 places, 136 transitions, 292 flow. Second operand has 3 states, 3 states have (on average 65.0) internal successors, (195), 3 states have internal predecessors, (195), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-12 16:18:59,079 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-12 16:18:59,079 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 64 of 184 [2024-11-12 16:18:59,079 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-12 16:19:02,396 INFO L124 PetriNetUnfolderBase]: 22121/45112 cut-off events. [2024-11-12 16:19:02,397 INFO L125 PetriNetUnfolderBase]: For 178/178 co-relation queries the response was YES. [2024-11-12 16:19:02,478 INFO L83 FinitePrefix]: Finished finitePrefix Result has 79717 conditions, 45112 events. 22121/45112 cut-off events. For 178/178 co-relation queries the response was YES. Maximal size of possible extension queue 784. Compared 432040 event pairs, 21743 based on Foata normal form. 1/43317 useless extension candidates. Maximal degree in co-relation 76973. Up to 34125 conditions per place. [2024-11-12 16:19:02,616 INFO L140 encePairwiseOnDemand]: 180/184 looper letters, 91 selfloop transitions, 2 changer transitions 0/155 dead transitions. [2024-11-12 16:19:02,616 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 142 places, 155 transitions, 516 flow [2024-11-12 16:19:02,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-12 16:19:02,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-12 16:19:02,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 287 transitions. [2024-11-12 16:19:02,617 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.519927536231884 [2024-11-12 16:19:02,617 INFO L175 Difference]: Start difference. First operand has 141 places, 136 transitions, 292 flow. Second operand 3 states and 287 transitions. [2024-11-12 16:19:02,617 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 142 places, 155 transitions, 516 flow [2024-11-12 16:19:02,643 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 140 places, 155 transitions, 512 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-12 16:19:02,645 INFO L231 Difference]: Finished difference. Result has 141 places, 137 transitions, 302 flow [2024-11-12 16:19:02,645 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=184, PETRI_DIFFERENCE_MINUEND_FLOW=288, PETRI_DIFFERENCE_MINUEND_PLACES=138, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=136, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=134, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=302, PETRI_PLACES=141, PETRI_TRANSITIONS=137} [2024-11-12 16:19:02,646 INFO L279 CegarLoopForPetriNet]: 145 programPoint places, -4 predicate places. [2024-11-12 16:19:02,646 INFO L471 AbstractCegarLoop]: Abstraction has has 141 places, 137 transitions, 302 flow [2024-11-12 16:19:02,646 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 65.0) internal successors, (195), 3 states have internal predecessors, (195), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-12 16:19:02,646 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-12 16:19:02,646 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1] [2024-11-12 16:19:02,647 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-11-12 16:19:02,647 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK (and 7 more)] === [2024-11-12 16:19:02,647 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 16:19:02,647 INFO L85 PathProgramCache]: Analyzing trace with hash 69585571, now seen corresponding path program 1 times [2024-11-12 16:19:02,647 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 16:19:02,648 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1499362981] [2024-11-12 16:19:02,648 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 16:19:02,648 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 16:19:02,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 16:19:02,747 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-12 16:19:02,748 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 16:19:02,748 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1499362981] [2024-11-12 16:19:02,748 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1499362981] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-12 16:19:02,748 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-12 16:19:02,748 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-12 16:19:02,748 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1751649996] [2024-11-12 16:19:02,749 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-12 16:19:02,749 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-12 16:19:02,749 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 16:19:02,749 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-12 16:19:02,749 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-12 16:19:02,767 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 63 out of 184 [2024-11-12 16:19:02,767 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 141 places, 137 transitions, 302 flow. Second operand has 5 states, 5 states have (on average 64.4) internal successors, (322), 5 states have internal predecessors, (322), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-12 16:19:02,767 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-12 16:19:02,767 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 63 of 184 [2024-11-12 16:19:02,768 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-12 16:19:05,999 INFO L124 PetriNetUnfolderBase]: 21592/42840 cut-off events. [2024-11-12 16:19:05,999 INFO L125 PetriNetUnfolderBase]: For 779/779 co-relation queries the response was YES. [2024-11-12 16:19:06,063 INFO L83 FinitePrefix]: Finished finitePrefix Result has 76419 conditions, 42840 events. 21592/42840 cut-off events. For 779/779 co-relation queries the response was YES. Maximal size of possible extension queue 782. Compared 411686 event pairs, 613 based on Foata normal form. 360/42453 useless extension candidates. Maximal degree in co-relation 4294. Up to 29231 conditions per place. [2024-11-12 16:19:06,189 INFO L140 encePairwiseOnDemand]: 179/184 looper letters, 158 selfloop transitions, 5 changer transitions 0/224 dead transitions. [2024-11-12 16:19:06,189 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 144 places, 224 transitions, 800 flow [2024-11-12 16:19:06,190 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-12 16:19:06,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-12 16:19:06,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 480 transitions. [2024-11-12 16:19:06,191 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5217391304347826 [2024-11-12 16:19:06,191 INFO L175 Difference]: Start difference. First operand has 141 places, 137 transitions, 302 flow. Second operand 5 states and 480 transitions. [2024-11-12 16:19:06,191 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 144 places, 224 transitions, 800 flow [2024-11-12 16:19:06,193 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 143 places, 224 transitions, 798 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-12 16:19:06,195 INFO L231 Difference]: Finished difference. Result has 144 places, 137 transitions, 313 flow [2024-11-12 16:19:06,195 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=184, PETRI_DIFFERENCE_MINUEND_FLOW=296, PETRI_DIFFERENCE_MINUEND_PLACES=139, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=136, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=131, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=313, PETRI_PLACES=144, PETRI_TRANSITIONS=137} [2024-11-12 16:19:06,196 INFO L279 CegarLoopForPetriNet]: 145 programPoint places, -1 predicate places. [2024-11-12 16:19:06,197 INFO L471 AbstractCegarLoop]: Abstraction has has 144 places, 137 transitions, 313 flow [2024-11-12 16:19:06,197 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 64.4) internal successors, (322), 5 states have internal predecessors, (322), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-12 16:19:06,197 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-12 16:19:06,197 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 1, 1, 1, 1] [2024-11-12 16:19:06,197 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-11-12 16:19:06,197 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK (and 7 more)] === [2024-11-12 16:19:06,198 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 16:19:06,198 INFO L85 PathProgramCache]: Analyzing trace with hash -948414375, now seen corresponding path program 1 times [2024-11-12 16:19:06,198 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 16:19:06,198 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1486504725] [2024-11-12 16:19:06,199 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 16:19:06,199 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 16:19:06,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-11-12 16:19:06,214 INFO L357 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2024-11-12 16:19:06,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-11-12 16:19:06,229 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2024-11-12 16:19:06,229 INFO L339 BasicCegarLoop]: Counterexample is feasible [2024-11-12 16:19:06,229 INFO L782 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (9 of 10 remaining) [2024-11-12 16:19:06,230 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (8 of 10 remaining) [2024-11-12 16:19:06,230 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (7 of 10 remaining) [2024-11-12 16:19:06,230 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK (6 of 10 remaining) [2024-11-12 16:19:06,230 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3ASSERT_VIOLATIONMEMORY_LEAK (5 of 10 remaining) [2024-11-12 16:19:06,230 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK (4 of 10 remaining) [2024-11-12 16:19:06,230 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (3 of 10 remaining) [2024-11-12 16:19:06,231 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (2 of 10 remaining) [2024-11-12 16:19:06,231 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK (1 of 10 remaining) [2024-11-12 16:19:06,232 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr5ASSERT_VIOLATIONMEMORY_LEAK (0 of 10 remaining) [2024-11-12 16:19:06,232 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-11-12 16:19:06,232 INFO L421 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1] [2024-11-12 16:19:06,232 WARN L244 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2024-11-12 16:19:06,232 INFO L489 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2024-11-12 16:19:06,263 INFO L143 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2024-11-12 16:19:06,267 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 181 places, 231 transitions, 489 flow [2024-11-12 16:19:06,323 INFO L124 PetriNetUnfolderBase]: 116/534 cut-off events. [2024-11-12 16:19:06,323 INFO L125 PetriNetUnfolderBase]: For 19/19 co-relation queries the response was YES. [2024-11-12 16:19:06,335 INFO L83 FinitePrefix]: Finished finitePrefix Result has 559 conditions, 534 events. 116/534 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 31. Compared 3055 event pairs, 1 based on Foata normal form. 0/366 useless extension candidates. Maximal degree in co-relation 379. Up to 12 conditions per place. [2024-11-12 16:19:06,335 INFO L82 GeneralOperation]: Start removeDead. Operand has 181 places, 231 transitions, 489 flow [2024-11-12 16:19:06,341 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 181 places, 231 transitions, 489 flow [2024-11-12 16:19:06,342 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-12 16:19:06,342 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;@5e030fb7, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-12 16:19:06,342 INFO L334 AbstractCegarLoop]: Starting to check reachability of 10 error locations. [2024-11-12 16:19:06,343 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-11-12 16:19:06,343 INFO L124 PetriNetUnfolderBase]: 0/4 cut-off events. [2024-11-12 16:19:06,343 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-11-12 16:19:06,344 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-12 16:19:06,344 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2024-11-12 16:19:06,344 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK (and 7 more)] === [2024-11-12 16:19:06,344 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 16:19:06,344 INFO L85 PathProgramCache]: Analyzing trace with hash 1029338, now seen corresponding path program 1 times [2024-11-12 16:19:06,347 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 16:19:06,347 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [183275257] [2024-11-12 16:19:06,348 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 16:19:06,348 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 16:19:06,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 16:19:06,374 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-12 16:19:06,374 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 16:19:06,374 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [183275257] [2024-11-12 16:19:06,374 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [183275257] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-12 16:19:06,374 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-12 16:19:06,375 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-11-12 16:19:06,375 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1178324609] [2024-11-12 16:19:06,375 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-12 16:19:06,375 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-12 16:19:06,375 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 16:19:06,375 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-12 16:19:06,375 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-12 16:19:06,383 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 77 out of 231 [2024-11-12 16:19:06,384 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 181 places, 231 transitions, 489 flow. Second operand has 3 states, 3 states have (on average 78.0) internal successors, (234), 3 states have internal predecessors, (234), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-12 16:19:06,384 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-12 16:19:06,384 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 77 of 231 [2024-11-12 16:19:06,384 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand