./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_09-ptrmunge_racing.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version a046e57d 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_09-ptrmunge_racing.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 7b88fee59ad03447f68c116aa52c40e006cc633d8116aa4d446048afd18fa64f --- Real Ultimate output --- This is Ultimate 0.2.5-tmp.dk.eval-mul-div-a046e57-m [2024-10-13 12:30:44,203 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-10-13 12:30:44,282 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2024-10-13 12:30:44,288 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-10-13 12:30:44,289 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-10-13 12:30:44,321 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-10-13 12:30:44,321 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-10-13 12:30:44,322 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-10-13 12:30:44,322 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-10-13 12:30:44,323 INFO L153 SettingsManager]: * Use memory slicer=true [2024-10-13 12:30:44,323 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-10-13 12:30:44,325 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-10-13 12:30:44,326 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-10-13 12:30:44,327 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-10-13 12:30:44,328 INFO L153 SettingsManager]: * Use SBE=true [2024-10-13 12:30:44,328 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-10-13 12:30:44,329 INFO L153 SettingsManager]: * sizeof long=4 [2024-10-13 12:30:44,329 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-10-13 12:30:44,329 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-10-13 12:30:44,330 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-10-13 12:30:44,330 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2024-10-13 12:30:44,331 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2024-10-13 12:30:44,331 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2024-10-13 12:30:44,331 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-10-13 12:30:44,332 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-10-13 12:30:44,332 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-10-13 12:30:44,332 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2024-10-13 12:30:44,333 INFO L153 SettingsManager]: * sizeof long double=12 [2024-10-13 12:30:44,333 INFO L153 SettingsManager]: * Use constant arrays=true [2024-10-13 12:30:44,333 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-10-13 12:30:44,334 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-10-13 12:30:44,334 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-10-13 12:30:44,334 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-10-13 12:30:44,335 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-13 12:30:44,335 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-10-13 12:30:44,335 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-10-13 12:30:44,336 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-10-13 12:30:44,336 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-10-13 12:30:44,336 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-10-13 12:30:44,337 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-10-13 12:30:44,337 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-10-13 12:30:44,338 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-10-13 12:30:44,338 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 7b88fee59ad03447f68c116aa52c40e006cc633d8116aa4d446048afd18fa64f [2024-10-13 12:30:44,608 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-10-13 12:30:44,643 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-10-13 12:30:44,647 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-10-13 12:30:44,648 INFO L270 PluginConnector]: Initializing CDTParser... [2024-10-13 12:30:44,649 INFO L274 PluginConnector]: CDTParser initialized [2024-10-13 12:30:44,650 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/goblint-regression/28-race_reach_09-ptrmunge_racing.i [2024-10-13 12:30:46,224 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-10-13 12:30:46,497 INFO L384 CDTParser]: Found 1 translation units. [2024-10-13 12:30:46,498 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/goblint-regression/28-race_reach_09-ptrmunge_racing.i [2024-10-13 12:30:46,516 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c6b72928b/a5360354aa8b417f8a7b82e20c081a24/FLAGda4074ab1 [2024-10-13 12:30:46,530 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c6b72928b/a5360354aa8b417f8a7b82e20c081a24 [2024-10-13 12:30:46,533 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-10-13 12:30:46,534 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-10-13 12:30:46,535 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-10-13 12:30:46,535 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-10-13 12:30:46,541 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-10-13 12:30:46,542 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 12:30:46" (1/1) ... [2024-10-13 12:30:46,543 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@b254784 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 12:30:46, skipping insertion in model container [2024-10-13 12:30:46,543 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 12:30:46" (1/1) ... [2024-10-13 12:30:46,596 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-10-13 12:30:46,995 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-13 12:30:47,012 INFO L200 MainTranslator]: Completed pre-run [2024-10-13 12:30:47,073 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-13 12:30:47,161 INFO L204 MainTranslator]: Completed translation [2024-10-13 12:30:47,161 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 12:30:47 WrapperNode [2024-10-13 12:30:47,162 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-10-13 12:30:47,164 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-10-13 12:30:47,164 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-10-13 12:30:47,165 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-10-13 12:30:47,171 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 12:30:47" (1/1) ... [2024-10-13 12:30:47,192 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 12:30:47" (1/1) ... [2024-10-13 12:30:47,259 INFO L138 Inliner]: procedures = 173, calls = 55, calls flagged for inlining = 6, calls inlined = 8, statements flattened = 243 [2024-10-13 12:30:47,259 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-10-13 12:30:47,261 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-10-13 12:30:47,261 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-10-13 12:30:47,261 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-10-13 12:30:47,272 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 12:30:47" (1/1) ... [2024-10-13 12:30:47,272 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 12:30:47" (1/1) ... [2024-10-13 12:30:47,276 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 12:30:47" (1/1) ... [2024-10-13 12:30:47,313 INFO L175 MemorySlicer]: Split 32 memory accesses to 7 slices as follows [2, 2, 5, 5, 5, 11, 2]. 34 percent of accesses are in the largest equivalence class. The 18 initializations are split as follows [2, 0, 5, 5, 5, 1, 0]. The 6 writes are split as follows [0, 1, 0, 0, 0, 4, 1]. [2024-10-13 12:30:47,314 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 12:30:47" (1/1) ... [2024-10-13 12:30:47,315 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 12:30:47" (1/1) ... [2024-10-13 12:30:47,334 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 12:30:47" (1/1) ... [2024-10-13 12:30:47,345 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 12:30:47" (1/1) ... [2024-10-13 12:30:47,347 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 12:30:47" (1/1) ... [2024-10-13 12:30:47,349 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 12:30:47" (1/1) ... [2024-10-13 12:30:47,353 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-10-13 12:30:47,354 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-10-13 12:30:47,354 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-10-13 12:30:47,354 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-10-13 12:30:47,355 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 12:30:47" (1/1) ... [2024-10-13 12:30:47,369 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-13 12:30:47,382 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-13 12:30:47,404 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) [2024-10-13 12:30:47,407 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 [2024-10-13 12:30:47,453 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-10-13 12:30:47,453 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-10-13 12:30:47,453 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2024-10-13 12:30:47,454 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#3 [2024-10-13 12:30:47,454 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#4 [2024-10-13 12:30:47,454 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#5 [2024-10-13 12:30:47,454 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#6 [2024-10-13 12:30:47,454 INFO L130 BoogieDeclarations]: Found specification of procedure t2_fun [2024-10-13 12:30:47,454 INFO L138 BoogieDeclarations]: Found implementation of procedure t2_fun [2024-10-13 12:30:47,454 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-10-13 12:30:47,455 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-10-13 12:30:47,455 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2024-10-13 12:30:47,455 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2024-10-13 12:30:47,455 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#4 [2024-10-13 12:30:47,455 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#5 [2024-10-13 12:30:47,455 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#6 [2024-10-13 12:30:47,455 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2024-10-13 12:30:47,456 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-10-13 12:30:47,456 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-10-13 12:30:47,456 INFO L130 BoogieDeclarations]: Found specification of procedure t1_fun [2024-10-13 12:30:47,456 INFO L138 BoogieDeclarations]: Found implementation of procedure t1_fun [2024-10-13 12:30:47,456 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-10-13 12:30:47,456 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-10-13 12:30:47,456 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-10-13 12:30:47,457 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-10-13 12:30:47,457 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2024-10-13 12:30:47,457 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#4 [2024-10-13 12:30:47,457 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#5 [2024-10-13 12:30:47,457 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#6 [2024-10-13 12:30:47,457 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexUnlock [2024-10-13 12:30:47,458 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-10-13 12:30:47,458 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-10-13 12:30:47,463 WARN L207 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2024-10-13 12:30:47,617 INFO L238 CfgBuilder]: Building ICFG [2024-10-13 12:30:47,619 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-10-13 12:30:48,050 INFO L283 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-10-13 12:30:48,050 INFO L287 CfgBuilder]: Performing block encoding [2024-10-13 12:30:48,292 INFO L309 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-10-13 12:30:48,292 INFO L314 CfgBuilder]: Removed 24 assume(true) statements. [2024-10-13 12:30:48,293 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 12:30:48 BoogieIcfgContainer [2024-10-13 12:30:48,293 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-10-13 12:30:48,295 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-10-13 12:30:48,295 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-10-13 12:30:48,299 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-10-13 12:30:48,299 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 12:30:46" (1/3) ... [2024-10-13 12:30:48,300 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@47a3cb17 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 12:30:48, skipping insertion in model container [2024-10-13 12:30:48,300 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 12:30:47" (2/3) ... [2024-10-13 12:30:48,301 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@47a3cb17 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 12:30:48, skipping insertion in model container [2024-10-13 12:30:48,301 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 12:30:48" (3/3) ... [2024-10-13 12:30:48,302 INFO L112 eAbstractionObserver]: Analyzing ICFG 28-race_reach_09-ptrmunge_racing.i [2024-10-13 12:30:48,318 INFO L209 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-10-13 12:30:48,319 INFO L149 ceAbstractionStarter]: Applying trace abstraction to program that has 31 error locations. [2024-10-13 12:30:48,319 INFO L484 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-10-13 12:30:48,413 INFO L143 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2024-10-13 12:30:48,463 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 128 places, 153 transitions, 326 flow [2024-10-13 12:30:48,579 INFO L124 PetriNetUnfolderBase]: 47/279 cut-off events. [2024-10-13 12:30:48,579 INFO L125 PetriNetUnfolderBase]: For 8/8 co-relation queries the response was YES. [2024-10-13 12:30:48,587 INFO L83 FinitePrefix]: Finished finitePrefix Result has 296 conditions, 279 events. 47/279 cut-off events. For 8/8 co-relation queries the response was YES. Maximal size of possible extension queue 27. Compared 1597 event pairs, 0 based on Foata normal form. 0/161 useless extension candidates. Maximal degree in co-relation 169. Up to 8 conditions per place. [2024-10-13 12:30:48,588 INFO L82 GeneralOperation]: Start removeDead. Operand has 128 places, 153 transitions, 326 flow [2024-10-13 12:30:48,598 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 128 places, 153 transitions, 326 flow [2024-10-13 12:30:48,608 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-10-13 12:30:48,618 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;@69befe88, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-10-13 12:30:48,619 INFO L334 AbstractCegarLoop]: Starting to check reachability of 55 error locations. [2024-10-13 12:30:48,623 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-10-13 12:30:48,623 INFO L124 PetriNetUnfolderBase]: 0/4 cut-off events. [2024-10-13 12:30:48,623 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-10-13 12:30:48,624 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-13 12:30:48,624 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2024-10-13 12:30:48,624 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [t2_funErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t2_funErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t2_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2024-10-13 12:30:48,629 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 12:30:48,629 INFO L85 PathProgramCache]: Analyzing trace with hash 638105, now seen corresponding path program 1 times [2024-10-13 12:30:48,637 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 12:30:48,638 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [922541550] [2024-10-13 12:30:48,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 12:30:48,639 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 12:30:48,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 12:30:48,962 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 12:30:48,963 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 12:30:48,963 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [922541550] [2024-10-13 12:30:48,964 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [922541550] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-13 12:30:48,964 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-13 12:30:48,964 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-10-13 12:30:48,966 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1792282870] [2024-10-13 12:30:48,967 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-13 12:30:48,976 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-13 12:30:48,981 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 12:30:49,008 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-13 12:30:49,010 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-13 12:30:49,083 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 153 [2024-10-13 12:30:49,087 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 128 places, 153 transitions, 326 flow. Second operand has 3 states, 3 states have (on average 66.0) internal successors, (198), 3 states have internal predecessors, (198), 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) [2024-10-13 12:30:49,087 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-13 12:30:49,088 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 153 [2024-10-13 12:30:49,089 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-13 12:30:51,193 INFO L124 PetriNetUnfolderBase]: 7103/15730 cut-off events. [2024-10-13 12:30:51,193 INFO L125 PetriNetUnfolderBase]: For 126/126 co-relation queries the response was YES. [2024-10-13 12:30:51,238 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26799 conditions, 15730 events. 7103/15730 cut-off events. For 126/126 co-relation queries the response was YES. Maximal size of possible extension queue 516. Compared 147682 event pairs, 4960 based on Foata normal form. 2790/16649 useless extension candidates. Maximal degree in co-relation 25633. Up to 8179 conditions per place. [2024-10-13 12:30:51,342 INFO L140 encePairwiseOnDemand]: 125/153 looper letters, 98 selfloop transitions, 2 changer transitions 0/165 dead transitions. [2024-10-13 12:30:51,342 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 126 places, 165 transitions, 550 flow [2024-10-13 12:30:51,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-13 12:30:51,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-10-13 12:30:51,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 345 transitions. [2024-10-13 12:30:51,356 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.7516339869281046 [2024-10-13 12:30:51,358 INFO L175 Difference]: Start difference. First operand has 128 places, 153 transitions, 326 flow. Second operand 3 states and 345 transitions. [2024-10-13 12:30:51,359 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 126 places, 165 transitions, 550 flow [2024-10-13 12:30:51,370 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 126 places, 165 transitions, 550 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-10-13 12:30:51,375 INFO L231 Difference]: Finished difference. Result has 126 places, 125 transitions, 274 flow [2024-10-13 12:30:51,377 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=153, PETRI_DIFFERENCE_MINUEND_FLOW=270, PETRI_DIFFERENCE_MINUEND_PLACES=124, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=125, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=123, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=274, PETRI_PLACES=126, PETRI_TRANSITIONS=125} [2024-10-13 12:30:51,383 INFO L277 CegarLoopForPetriNet]: 128 programPoint places, -2 predicate places. [2024-10-13 12:30:51,384 INFO L471 AbstractCegarLoop]: Abstraction has has 126 places, 125 transitions, 274 flow [2024-10-13 12:30:51,384 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 66.0) internal successors, (198), 3 states have internal predecessors, (198), 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) [2024-10-13 12:30:51,384 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-13 12:30:51,384 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2024-10-13 12:30:51,385 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-10-13 12:30:51,385 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [t2_funErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t2_funErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t2_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2024-10-13 12:30:51,386 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 12:30:51,386 INFO L85 PathProgramCache]: Analyzing trace with hash 638106, now seen corresponding path program 1 times [2024-10-13 12:30:51,386 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 12:30:51,386 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1942179240] [2024-10-13 12:30:51,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 12:30:51,387 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 12:30:51,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 12:30:51,585 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 12:30:51,586 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 12:30:51,586 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1942179240] [2024-10-13 12:30:51,586 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1942179240] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-13 12:30:51,587 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-13 12:30:51,587 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-10-13 12:30:51,587 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [280939204] [2024-10-13 12:30:51,587 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-13 12:30:51,588 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-13 12:30:51,589 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 12:30:51,589 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-13 12:30:51,590 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-13 12:30:51,638 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 68 out of 153 [2024-10-13 12:30:51,639 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 126 places, 125 transitions, 274 flow. Second operand has 3 states, 3 states have (on average 69.0) internal successors, (207), 3 states have internal predecessors, (207), 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) [2024-10-13 12:30:51,640 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-13 12:30:51,640 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 68 of 153 [2024-10-13 12:30:51,640 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-13 12:30:53,245 INFO L124 PetriNetUnfolderBase]: 6020/14205 cut-off events. [2024-10-13 12:30:53,246 INFO L125 PetriNetUnfolderBase]: For 602/602 co-relation queries the response was YES. [2024-10-13 12:30:53,282 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24170 conditions, 14205 events. 6020/14205 cut-off events. For 602/602 co-relation queries the response was YES. Maximal size of possible extension queue 487. Compared 137045 event pairs, 2640 based on Foata normal form. 1/12269 useless extension candidates. Maximal degree in co-relation 23270. Up to 9321 conditions per place. [2024-10-13 12:30:53,350 INFO L140 encePairwiseOnDemand]: 149/153 looper letters, 78 selfloop transitions, 2 changer transitions 0/146 dead transitions. [2024-10-13 12:30:53,351 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 128 places, 146 transitions, 476 flow [2024-10-13 12:30:53,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-13 12:30:53,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-10-13 12:30:53,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 286 transitions. [2024-10-13 12:30:53,357 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6230936819172114 [2024-10-13 12:30:53,357 INFO L175 Difference]: Start difference. First operand has 126 places, 125 transitions, 274 flow. Second operand 3 states and 286 transitions. [2024-10-13 12:30:53,357 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 128 places, 146 transitions, 476 flow [2024-10-13 12:30:53,378 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 126 places, 146 transitions, 472 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-10-13 12:30:53,383 INFO L231 Difference]: Finished difference. Result has 127 places, 125 transitions, 280 flow [2024-10-13 12:30:53,384 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=153, PETRI_DIFFERENCE_MINUEND_FLOW=270, PETRI_DIFFERENCE_MINUEND_PLACES=124, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=125, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=123, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=280, PETRI_PLACES=127, PETRI_TRANSITIONS=125} [2024-10-13 12:30:53,384 INFO L277 CegarLoopForPetriNet]: 128 programPoint places, -1 predicate places. [2024-10-13 12:30:53,386 INFO L471 AbstractCegarLoop]: Abstraction has has 127 places, 125 transitions, 280 flow [2024-10-13 12:30:53,386 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 69.0) internal successors, (207), 3 states have internal predecessors, (207), 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) [2024-10-13 12:30:53,386 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-13 12:30:53,386 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1] [2024-10-13 12:30:53,387 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-10-13 12:30:53,387 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [t2_funErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t2_funErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t2_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2024-10-13 12:30:53,388 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 12:30:53,388 INFO L85 PathProgramCache]: Analyzing trace with hash 917887010, now seen corresponding path program 1 times [2024-10-13 12:30:53,389 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 12:30:53,389 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [820347276] [2024-10-13 12:30:53,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 12:30:53,390 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 12:30:53,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 12:30:53,584 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 12:30:53,585 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 12:30:53,585 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [820347276] [2024-10-13 12:30:53,585 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [820347276] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-13 12:30:53,586 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1159542839] [2024-10-13 12:30:53,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 12:30:53,586 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 12:30:53,586 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-13 12:30:53,589 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) [2024-10-13 12:30:53,590 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-10-13 12:30:53,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 12:30:53,688 INFO L255 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-10-13 12:30:53,694 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-13 12:30:53,762 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 [2024-10-13 12:30:53,841 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 12:30:53,842 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-13 12:30:53,910 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 12:30:53,911 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1159542839] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-13 12:30:53,911 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-13 12:30:53,911 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 2, 2] total 7 [2024-10-13 12:30:53,911 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1163386131] [2024-10-13 12:30:53,911 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-13 12:30:53,912 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-10-13 12:30:53,912 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 12:30:53,912 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-10-13 12:30:53,913 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2024-10-13 12:30:54,139 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 67 out of 153 [2024-10-13 12:30:54,141 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 127 places, 125 transitions, 280 flow. Second operand has 9 states, 9 states have (on average 69.33333333333333) internal successors, (624), 9 states have internal predecessors, (624), 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) [2024-10-13 12:30:54,141 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-13 12:30:54,141 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 67 of 153 [2024-10-13 12:30:54,141 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-13 12:30:54,272 INFO L124 PetriNetUnfolderBase]: 61/194 cut-off events. [2024-10-13 12:30:54,273 INFO L125 PetriNetUnfolderBase]: For 20/20 co-relation queries the response was YES. [2024-10-13 12:30:54,273 INFO L83 FinitePrefix]: Finished finitePrefix Result has 392 conditions, 194 events. 61/194 cut-off events. For 20/20 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 821 event pairs, 0 based on Foata normal form. 42/224 useless extension candidates. Maximal degree in co-relation 386. Up to 123 conditions per place. [2024-10-13 12:30:54,275 INFO L140 encePairwiseOnDemand]: 149/153 looper letters, 45 selfloop transitions, 2 changer transitions 0/74 dead transitions. [2024-10-13 12:30:54,275 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 74 transitions, 252 flow [2024-10-13 12:30:54,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-10-13 12:30:54,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-10-13 12:30:54,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 317 transitions. [2024-10-13 12:30:54,277 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5179738562091504 [2024-10-13 12:30:54,277 INFO L175 Difference]: Start difference. First operand has 127 places, 125 transitions, 280 flow. Second operand 4 states and 317 transitions. [2024-10-13 12:30:54,277 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 74 transitions, 252 flow [2024-10-13 12:30:54,278 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 74 transitions, 246 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-10-13 12:30:54,280 INFO L231 Difference]: Finished difference. Result has 58 places, 52 transitions, 112 flow [2024-10-13 12:30:54,280 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=153, PETRI_DIFFERENCE_MINUEND_FLOW=108, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=52, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=112, PETRI_PLACES=58, PETRI_TRANSITIONS=52} [2024-10-13 12:30:54,281 INFO L277 CegarLoopForPetriNet]: 128 programPoint places, -70 predicate places. [2024-10-13 12:30:54,282 INFO L471 AbstractCegarLoop]: Abstraction has has 58 places, 52 transitions, 112 flow [2024-10-13 12:30:54,283 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 69.33333333333333) internal successors, (624), 9 states have internal predecessors, (624), 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) [2024-10-13 12:30:54,283 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-13 12:30:54,283 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1] [2024-10-13 12:30:54,308 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-10-13 12:30:54,488 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 12:30:54,489 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [t2_funErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t2_funErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t2_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2024-10-13 12:30:54,490 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 12:30:54,490 INFO L85 PathProgramCache]: Analyzing trace with hash -1610272974, now seen corresponding path program 1 times [2024-10-13 12:30:54,490 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 12:30:54,490 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1282059607] [2024-10-13 12:30:54,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 12:30:54,491 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 12:30:54,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-10-13 12:30:54,511 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2024-10-13 12:30:54,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-10-13 12:30:54,549 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2024-10-13 12:30:54,550 INFO L325 BasicCegarLoop]: Counterexample is feasible [2024-10-13 12:30:54,552 INFO L782 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (54 of 55 remaining) [2024-10-13 12:30:54,554 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t2_funErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (53 of 55 remaining) [2024-10-13 12:30:54,554 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t2_funErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (52 of 55 remaining) [2024-10-13 12:30:54,554 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t2_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (51 of 55 remaining) [2024-10-13 12:30:54,554 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t2_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (50 of 55 remaining) [2024-10-13 12:30:54,555 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t2_funErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (49 of 55 remaining) [2024-10-13 12:30:54,555 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t2_funErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (48 of 55 remaining) [2024-10-13 12:30:54,555 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t2_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (47 of 55 remaining) [2024-10-13 12:30:54,555 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t2_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (46 of 55 remaining) [2024-10-13 12:30:54,555 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t2_funErr10ASSERT_VIOLATIONMEMORY_LEAK (45 of 55 remaining) [2024-10-13 12:30:54,556 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t2_funErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (44 of 55 remaining) [2024-10-13 12:30:54,556 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t2_funErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (43 of 55 remaining) [2024-10-13 12:30:54,556 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (42 of 55 remaining) [2024-10-13 12:30:54,556 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (41 of 55 remaining) [2024-10-13 12:30:54,557 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (40 of 55 remaining) [2024-10-13 12:30:54,557 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (39 of 55 remaining) [2024-10-13 12:30:54,557 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (38 of 55 remaining) [2024-10-13 12:30:54,557 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (37 of 55 remaining) [2024-10-13 12:30:54,558 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (36 of 55 remaining) [2024-10-13 12:30:54,558 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (35 of 55 remaining) [2024-10-13 12:30:54,558 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK (34 of 55 remaining) [2024-10-13 12:30:54,558 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (33 of 55 remaining) [2024-10-13 12:30:54,558 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t1_funErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (32 of 55 remaining) [2024-10-13 12:30:54,559 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t1_funErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (31 of 55 remaining) [2024-10-13 12:30:54,559 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t1_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (30 of 55 remaining) [2024-10-13 12:30:54,559 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t1_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (29 of 55 remaining) [2024-10-13 12:30:54,559 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t1_funErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (28 of 55 remaining) [2024-10-13 12:30:54,559 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t1_funErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (27 of 55 remaining) [2024-10-13 12:30:54,559 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t1_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (26 of 55 remaining) [2024-10-13 12:30:54,559 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t1_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (25 of 55 remaining) [2024-10-13 12:30:54,560 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t1_funErr10ASSERT_VIOLATIONMEMORY_LEAK (24 of 55 remaining) [2024-10-13 12:30:54,560 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t1_funErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (23 of 55 remaining) [2024-10-13 12:30:54,560 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t1_funErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (22 of 55 remaining) [2024-10-13 12:30:54,560 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t2_funErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (21 of 55 remaining) [2024-10-13 12:30:54,560 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t2_funErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (20 of 55 remaining) [2024-10-13 12:30:54,560 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t2_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (19 of 55 remaining) [2024-10-13 12:30:54,560 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t2_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (18 of 55 remaining) [2024-10-13 12:30:54,561 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t2_funErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (17 of 55 remaining) [2024-10-13 12:30:54,561 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t2_funErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (16 of 55 remaining) [2024-10-13 12:30:54,561 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t2_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (15 of 55 remaining) [2024-10-13 12:30:54,562 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t2_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (14 of 55 remaining) [2024-10-13 12:30:54,563 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t2_funErr10ASSERT_VIOLATIONMEMORY_LEAK (13 of 55 remaining) [2024-10-13 12:30:54,563 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t2_funErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (12 of 55 remaining) [2024-10-13 12:30:54,563 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t2_funErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (11 of 55 remaining) [2024-10-13 12:30:54,563 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t1_funErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (10 of 55 remaining) [2024-10-13 12:30:54,563 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t1_funErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (9 of 55 remaining) [2024-10-13 12:30:54,564 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t1_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (8 of 55 remaining) [2024-10-13 12:30:54,564 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t1_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (7 of 55 remaining) [2024-10-13 12:30:54,564 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t1_funErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (6 of 55 remaining) [2024-10-13 12:30:54,567 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t1_funErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 55 remaining) [2024-10-13 12:30:54,567 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t1_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 55 remaining) [2024-10-13 12:30:54,567 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t1_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (3 of 55 remaining) [2024-10-13 12:30:54,567 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t1_funErr10ASSERT_VIOLATIONMEMORY_LEAK (2 of 55 remaining) [2024-10-13 12:30:54,568 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t1_funErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (1 of 55 remaining) [2024-10-13 12:30:54,568 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t1_funErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (0 of 55 remaining) [2024-10-13 12:30:54,568 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-10-13 12:30:54,568 INFO L407 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1] [2024-10-13 12:30:54,573 WARN L239 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2024-10-13 12:30:54,575 INFO L484 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2024-10-13 12:30:54,755 INFO L143 ThreadInstanceAdder]: Constructed 8 joinOtherThreadTransitions. [2024-10-13 12:30:54,762 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 226 places, 277 transitions, 598 flow [2024-10-13 12:30:54,886 INFO L124 PetriNetUnfolderBase]: 161/839 cut-off events. [2024-10-13 12:30:54,886 INFO L125 PetriNetUnfolderBase]: For 72/80 co-relation queries the response was YES. [2024-10-13 12:30:54,905 INFO L83 FinitePrefix]: Finished finitePrefix Result has 928 conditions, 839 events. 161/839 cut-off events. For 72/80 co-relation queries the response was YES. Maximal size of possible extension queue 56. Compared 6189 event pairs, 2 based on Foata normal form. 0/499 useless extension candidates. Maximal degree in co-relation 521. Up to 32 conditions per place. [2024-10-13 12:30:54,905 INFO L82 GeneralOperation]: Start removeDead. Operand has 226 places, 277 transitions, 598 flow [2024-10-13 12:30:54,921 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 226 places, 277 transitions, 598 flow [2024-10-13 12:30:54,923 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-10-13 12:30:54,924 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;@69befe88, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-10-13 12:30:54,924 INFO L334 AbstractCegarLoop]: Starting to check reachability of 77 error locations. [2024-10-13 12:30:54,926 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-10-13 12:30:54,926 INFO L124 PetriNetUnfolderBase]: 0/4 cut-off events. [2024-10-13 12:30:54,926 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-10-13 12:30:54,926 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-13 12:30:54,926 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2024-10-13 12:30:54,926 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [t2_funErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t2_funErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t2_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 74 more)] === [2024-10-13 12:30:54,927 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 12:30:54,927 INFO L85 PathProgramCache]: Analyzing trace with hash 911180, now seen corresponding path program 1 times [2024-10-13 12:30:54,927 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 12:30:54,927 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1502939904] [2024-10-13 12:30:54,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 12:30:54,928 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 12:30:54,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 12:30:54,964 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 12:30:54,964 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 12:30:54,964 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1502939904] [2024-10-13 12:30:54,964 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1502939904] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-13 12:30:54,964 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-13 12:30:54,965 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-10-13 12:30:54,965 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [70793215] [2024-10-13 12:30:54,965 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-13 12:30:54,965 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-13 12:30:54,965 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 12:30:54,966 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-13 12:30:54,966 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-13 12:30:55,013 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 117 out of 277 [2024-10-13 12:30:55,014 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 226 places, 277 transitions, 598 flow. Second operand has 3 states, 3 states have (on average 118.0) internal successors, (354), 3 states have internal predecessors, (354), 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) [2024-10-13 12:30:55,014 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-13 12:30:55,014 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 117 of 277 [2024-10-13 12:30:55,014 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand