./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/goblint-regression/28-race_reach_51-mutexptr_racefree.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 3289d67d Calling Ultimate with: /root/.sdkman/candidates/java/11.0.12-open/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/goblint-regression/28-race_reach_51-mutexptr_racefree.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-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 ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash f222d5749b9bb10b4d4c09b2c40e45ee19dec77732a8593ce917652e8ca8a43e --- Real Ultimate output --- This is Ultimate 0.2.5-tmp.fs.icfgbuilder-eval-3289d67-m [2024-11-16 19:20:52,797 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-16 19:20:52,868 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-11-16 19:20:52,874 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-16 19:20:52,876 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-16 19:20:52,898 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-16 19:20:52,899 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-16 19:20:52,899 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-16 19:20:52,900 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-16 19:20:52,900 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-16 19:20:52,900 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-16 19:20:52,901 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-16 19:20:52,902 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-16 19:20:52,904 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-16 19:20:52,905 INFO L153 SettingsManager]: * Use SBE=true [2024-11-16 19:20:52,905 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-16 19:20:52,905 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-16 19:20:52,906 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-16 19:20:52,906 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-16 19:20:52,906 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-16 19:20:52,907 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-16 19:20:52,907 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-16 19:20:52,911 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-16 19:20:52,911 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-16 19:20:52,911 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-16 19:20:52,911 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-16 19:20:52,912 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-16 19:20:52,912 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-16 19:20:52,912 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2024-11-16 19:20:52,913 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-16 19:20:52,913 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-16 19:20:52,913 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-16 19:20:52,913 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-16 19:20:52,914 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-16 19:20:52,914 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-16 19:20:52,916 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-16 19:20:52,916 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-16 19:20:52,916 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-16 19:20:52,916 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-16 19:20:52,917 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-16 19:20:52,917 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-16 19:20:52,917 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-16 19:20:52,918 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> f222d5749b9bb10b4d4c09b2c40e45ee19dec77732a8593ce917652e8ca8a43e [2024-11-16 19:20:53,223 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-16 19:20:53,250 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-16 19:20:53,254 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-16 19:20:53,255 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-16 19:20:53,257 INFO L274 PluginConnector]: CDTParser initialized [2024-11-16 19:20:53,258 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/goblint-regression/28-race_reach_51-mutexptr_racefree.i [2024-11-16 19:20:54,627 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-16 19:20:54,875 INFO L384 CDTParser]: Found 1 translation units. [2024-11-16 19:20:54,875 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/goblint-regression/28-race_reach_51-mutexptr_racefree.i [2024-11-16 19:20:54,889 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8d8ad8db1/18fe3e28397f4d05b17f07fba2dbdf82/FLAGdcab5d166 [2024-11-16 19:20:54,901 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8d8ad8db1/18fe3e28397f4d05b17f07fba2dbdf82 [2024-11-16 19:20:54,904 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-16 19:20:54,905 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-16 19:20:54,906 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-16 19:20:54,906 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-16 19:20:54,911 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-16 19:20:54,912 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.11 07:20:54" (1/1) ... [2024-11-16 19:20:54,912 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@55df6959 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:20:54, skipping insertion in model container [2024-11-16 19:20:54,913 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.11 07:20:54" (1/1) ... [2024-11-16 19:20:54,952 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-16 19:20:55,288 WARN L250 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/goblint-regression/28-race_reach_51-mutexptr_racefree.i[30176,30189] [2024-11-16 19:20:55,316 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-16 19:20:55,342 INFO L200 MainTranslator]: Completed pre-run [2024-11-16 19:20:55,389 WARN L250 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/goblint-regression/28-race_reach_51-mutexptr_racefree.i[30176,30189] [2024-11-16 19:20:55,397 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-16 19:20:55,447 INFO L204 MainTranslator]: Completed translation [2024-11-16 19:20:55,448 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:20:55 WrapperNode [2024-11-16 19:20:55,448 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-16 19:20:55,449 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-16 19:20:55,449 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-16 19:20:55,449 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-16 19:20:55,456 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:20:55" (1/1) ... [2024-11-16 19:20:55,475 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:20:55" (1/1) ... [2024-11-16 19:20:55,504 INFO L138 Inliner]: procedures = 171, calls = 42, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 136 [2024-11-16 19:20:55,505 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-16 19:20:55,506 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-16 19:20:55,506 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-16 19:20:55,506 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-16 19:20:55,517 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:20:55" (1/1) ... [2024-11-16 19:20:55,517 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:20:55" (1/1) ... [2024-11-16 19:20:55,521 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:20:55" (1/1) ... [2024-11-16 19:20:55,538 INFO L175 MemorySlicer]: Split 20 memory accesses to 5 slices as follows [2, 5, 5, 2, 6]. 30 percent of accesses are in the largest equivalence class. The 13 initializations are split as follows [2, 5, 5, 0, 1]. The 3 writes are split as follows [0, 0, 0, 1, 2]. [2024-11-16 19:20:55,538 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:20:55" (1/1) ... [2024-11-16 19:20:55,538 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:20:55" (1/1) ... [2024-11-16 19:20:55,548 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:20:55" (1/1) ... [2024-11-16 19:20:55,550 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:20:55" (1/1) ... [2024-11-16 19:20:55,552 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:20:55" (1/1) ... [2024-11-16 19:20:55,554 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:20:55" (1/1) ... [2024-11-16 19:20:55,557 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-16 19:20:55,558 INFO L112 PluginConnector]: ------------------------IcfgBuilder---------------------------- [2024-11-16 19:20:55,558 INFO L270 PluginConnector]: Initializing IcfgBuilder... [2024-11-16 19:20:55,558 INFO L274 PluginConnector]: IcfgBuilder initialized [2024-11-16 19:20:55,559 INFO L184 PluginConnector]: Executing the observer IcfgBuilderObserver from plugin IcfgBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:20:55" (1/1) ... [2024-11-16 19:20:55,565 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-16 19:20:55,580 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-16 19:20:55,602 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) [2024-11-16 19:20:55,608 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 [2024-11-16 19:20:55,661 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-11-16 19:20:55,662 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-11-16 19:20:55,662 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2024-11-16 19:20:55,663 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#3 [2024-11-16 19:20:55,663 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#4 [2024-11-16 19:20:55,663 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-11-16 19:20:55,663 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-11-16 19:20:55,663 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2024-11-16 19:20:55,663 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2024-11-16 19:20:55,664 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#4 [2024-11-16 19:20:55,664 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2024-11-16 19:20:55,665 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-16 19:20:55,665 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-11-16 19:20:55,665 INFO L130 BoogieDeclarations]: Found specification of procedure t_fun [2024-11-16 19:20:55,665 INFO L138 BoogieDeclarations]: Found implementation of procedure t_fun [2024-11-16 19:20:55,665 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-11-16 19:20:55,665 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-16 19:20:55,666 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-11-16 19:20:55,666 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-11-16 19:20:55,666 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2024-11-16 19:20:55,666 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#4 [2024-11-16 19:20:55,666 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexUnlock [2024-11-16 19:20:55,666 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-16 19:20:55,666 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-16 19:20:55,668 WARN L225 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2024-11-16 19:20:55,933 INFO L256 CfgBuilder]: Building ICFG [2024-11-16 19:20:55,936 INFO L286 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-16 19:20:56,160 INFO L1250 $ProcedureCfgBuilder]: dead code at ProgramPoint L713: havoc main_~#t_ids~0#1.base, main_~#t_ids~0#1.offset; [2024-11-16 19:20:56,161 INFO L1250 $ProcedureCfgBuilder]: dead code at ProgramPoint L713-1: SUMMARY for call ULTIMATE.dealloc(main_~#t_ids~0#1.base, main_~#t_ids~0#1.offset); srcloc: null [2024-11-16 19:20:56,208 INFO L303 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-11-16 19:20:56,208 INFO L307 CfgBuilder]: Performing block encoding [2024-11-16 19:20:56,490 INFO L331 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-16 19:20:56,491 INFO L336 CfgBuilder]: Removed 0 assume(true) statements. [2024-11-16 19:20:56,492 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 16.11 07:20:56 BoogieIcfgContainer [2024-11-16 19:20:56,492 INFO L131 PluginConnector]: ------------------------ END IcfgBuilder---------------------------- [2024-11-16 19:20:56,495 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-16 19:20:56,496 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-16 19:20:56,499 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-16 19:20:56,499 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.11 07:20:54" (1/3) ... [2024-11-16 19:20:56,500 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@255e2470 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.11 07:20:56, skipping insertion in model container [2024-11-16 19:20:56,501 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:20:55" (2/3) ... [2024-11-16 19:20:56,501 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@255e2470 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.11 07:20:56, skipping insertion in model container [2024-11-16 19:20:56,501 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 16.11 07:20:56" (3/3) ... [2024-11-16 19:20:56,502 INFO L112 eAbstractionObserver]: Analyzing ICFG 28-race_reach_51-mutexptr_racefree.i [2024-11-16 19:20:56,520 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-16 19:20:56,521 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-11-16 19:20:56,521 INFO L489 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-11-16 19:20:56,571 INFO L143 ThreadInstanceAdder]: Constructed 1 joinOtherThreadTransitions. [2024-11-16 19:20:56,612 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 49 places, 58 transitions, 123 flow [2024-11-16 19:20:56,658 INFO L124 PetriNetUnfolderBase]: 17/85 cut-off events. [2024-11-16 19:20:56,659 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2024-11-16 19:20:56,664 INFO L83 FinitePrefix]: Finished finitePrefix Result has 90 conditions, 85 events. 17/85 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 269 event pairs, 0 based on Foata normal form. 0/63 useless extension candidates. Maximal degree in co-relation 53. Up to 4 conditions per place. [2024-11-16 19:20:56,664 INFO L82 GeneralOperation]: Start removeDead. Operand has 49 places, 58 transitions, 123 flow [2024-11-16 19:20:56,668 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 48 places, 56 transitions, 116 flow [2024-11-16 19:20:56,678 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-16 19:20:56,687 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=LoopHeads, 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;@25dd4cba, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-16 19:20:56,688 INFO L334 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2024-11-16 19:20:56,701 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-11-16 19:20:56,704 INFO L124 PetriNetUnfolderBase]: 2/22 cut-off events. [2024-11-16 19:20:56,704 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-11-16 19:20:56,704 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-16 19:20:56,705 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1] [2024-11-16 19:20:56,706 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-16 19:20:56,712 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-16 19:20:56,712 INFO L85 PathProgramCache]: Analyzing trace with hash 61979884, now seen corresponding path program 1 times [2024-11-16 19:20:56,720 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-16 19:20:56,720 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [105369228] [2024-11-16 19:20:56,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 19:20:56,721 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-16 19:20:57,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-11-16 19:20:57,007 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2024-11-16 19:20:57,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-11-16 19:20:57,117 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2024-11-16 19:20:57,119 INFO L325 BasicCegarLoop]: Counterexample is feasible [2024-11-16 19:20:57,120 INFO L782 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2024-11-16 19:20:57,122 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2024-11-16 19:20:57,123 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-16 19:20:57,123 INFO L407 BasicCegarLoop]: Path program histogram: [1] [2024-11-16 19:20:57,126 WARN L244 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2024-11-16 19:20:57,126 INFO L489 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2024-11-16 19:20:57,159 INFO L143 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2024-11-16 19:20:57,163 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 71 places, 85 transitions, 186 flow [2024-11-16 19:20:57,201 INFO L124 PetriNetUnfolderBase]: 31/149 cut-off events. [2024-11-16 19:20:57,201 INFO L125 PetriNetUnfolderBase]: For 6/6 co-relation queries the response was YES. [2024-11-16 19:20:57,204 INFO L83 FinitePrefix]: Finished finitePrefix Result has 161 conditions, 149 events. 31/149 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 572 event pairs, 0 based on Foata normal form. 0/111 useless extension candidates. Maximal degree in co-relation 89. Up to 8 conditions per place. [2024-11-16 19:20:57,204 INFO L82 GeneralOperation]: Start removeDead. Operand has 71 places, 85 transitions, 186 flow [2024-11-16 19:20:57,206 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 71 places, 85 transitions, 186 flow [2024-11-16 19:20:57,207 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-16 19:20:57,208 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=LoopHeads, 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;@25dd4cba, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-16 19:20:57,211 INFO L334 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2024-11-16 19:20:57,222 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-11-16 19:20:57,223 INFO L124 PetriNetUnfolderBase]: 7/53 cut-off events. [2024-11-16 19:20:57,223 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2024-11-16 19:20:57,224 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-16 19:20:57,224 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-16 19:20:57,224 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-16 19:20:57,225 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-16 19:20:57,225 INFO L85 PathProgramCache]: Analyzing trace with hash 136272144, now seen corresponding path program 1 times [2024-11-16 19:20:57,225 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-16 19:20:57,226 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [118213718] [2024-11-16 19:20:57,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 19:20:57,226 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-16 19:20:57,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 19:20:57,367 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-16 19:20:57,368 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-16 19:20:57,368 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [118213718] [2024-11-16 19:20:57,368 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [118213718] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-16 19:20:57,369 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-16 19:20:57,369 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-16 19:20:57,369 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1870153989] [2024-11-16 19:20:57,370 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-16 19:20:57,377 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-11-16 19:20:57,382 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-16 19:20:57,411 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-11-16 19:20:57,412 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-11-16 19:20:57,414 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 29 out of 85 [2024-11-16 19:20:57,417 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 85 transitions, 186 flow. Second operand has 2 states, 2 states have (on average 32.5) internal successors, (65), 2 states have internal predecessors, (65), 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) [2024-11-16 19:20:57,417 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-16 19:20:57,417 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 29 of 85 [2024-11-16 19:20:57,418 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-16 19:20:58,311 INFO L124 PetriNetUnfolderBase]: 3163/6600 cut-off events. [2024-11-16 19:20:58,311 INFO L125 PetriNetUnfolderBase]: For 59/59 co-relation queries the response was YES. [2024-11-16 19:20:58,326 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11743 conditions, 6600 events. 3163/6600 cut-off events. For 59/59 co-relation queries the response was YES. Maximal size of possible extension queue 208. Compared 50751 event pairs, 3150 based on Foata normal form. 2539/8955 useless extension candidates. Maximal degree in co-relation 7843. Up to 5081 conditions per place. [2024-11-16 19:20:58,349 INFO L140 encePairwiseOnDemand]: 68/85 looper letters, 30 selfloop transitions, 0 changer transitions 13/68 dead transitions. [2024-11-16 19:20:58,349 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 68 transitions, 230 flow [2024-11-16 19:20:58,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-11-16 19:20:58,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2024-11-16 19:20:58,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 114 transitions. [2024-11-16 19:20:58,362 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6705882352941176 [2024-11-16 19:20:58,364 INFO L175 Difference]: Start difference. First operand has 71 places, 85 transitions, 186 flow. Second operand 2 states and 114 transitions. [2024-11-16 19:20:58,365 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 68 transitions, 230 flow [2024-11-16 19:20:58,370 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 68 transitions, 230 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-11-16 19:20:58,372 INFO L231 Difference]: Finished difference. Result has 72 places, 55 transitions, 120 flow [2024-11-16 19:20:58,376 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=85, PETRI_DIFFERENCE_MINUEND_FLOW=152, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=68, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=120, PETRI_PLACES=72, PETRI_TRANSITIONS=55} [2024-11-16 19:20:58,380 INFO L277 CegarLoopForPetriNet]: 71 programPoint places, 1 predicate places. [2024-11-16 19:20:58,380 INFO L471 AbstractCegarLoop]: Abstraction has has 72 places, 55 transitions, 120 flow [2024-11-16 19:20:58,380 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 32.5) internal successors, (65), 2 states have internal predecessors, (65), 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) [2024-11-16 19:20:58,380 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-16 19:20:58,380 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-16 19:20:58,381 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-16 19:20:58,381 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-16 19:20:58,382 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-16 19:20:58,383 INFO L85 PathProgramCache]: Analyzing trace with hash 418460918, now seen corresponding path program 1 times [2024-11-16 19:20:58,384 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-16 19:20:58,384 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [788983174] [2024-11-16 19:20:58,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 19:20:58,385 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-16 19:20:58,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 19:20:58,525 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-16 19:20:58,525 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-16 19:20:58,525 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [788983174] [2024-11-16 19:20:58,526 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [788983174] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-16 19:20:58,526 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-16 19:20:58,526 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-16 19:20:58,526 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [590186264] [2024-11-16 19:20:58,526 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-16 19:20:58,526 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-16 19:20:58,527 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-16 19:20:58,527 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-16 19:20:58,527 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-16 19:20:58,528 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 28 out of 85 [2024-11-16 19:20:58,528 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 55 transitions, 120 flow. Second operand has 3 states, 3 states have (on average 30.333333333333332) internal successors, (91), 3 states have internal predecessors, (91), 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) [2024-11-16 19:20:58,528 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-16 19:20:58,528 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 28 of 85 [2024-11-16 19:20:58,528 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-16 19:20:59,021 INFO L124 PetriNetUnfolderBase]: 1950/4162 cut-off events. [2024-11-16 19:20:59,022 INFO L125 PetriNetUnfolderBase]: For 22/22 co-relation queries the response was YES. [2024-11-16 19:20:59,029 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7342 conditions, 4162 events. 1950/4162 cut-off events. For 22/22 co-relation queries the response was YES. Maximal size of possible extension queue 149. Compared 30558 event pairs, 880 based on Foata normal form. 0/3980 useless extension candidates. Maximal degree in co-relation 7337. Up to 3128 conditions per place. [2024-11-16 19:20:59,048 INFO L140 encePairwiseOnDemand]: 82/85 looper letters, 41 selfloop transitions, 2 changer transitions 0/67 dead transitions. [2024-11-16 19:20:59,048 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 67 transitions, 230 flow [2024-11-16 19:20:59,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-16 19:20:59,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-16 19:20:59,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 128 transitions. [2024-11-16 19:20:59,051 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5019607843137255 [2024-11-16 19:20:59,051 INFO L175 Difference]: Start difference. First operand has 72 places, 55 transitions, 120 flow. Second operand 3 states and 128 transitions. [2024-11-16 19:20:59,051 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 67 transitions, 230 flow [2024-11-16 19:20:59,052 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 67 transitions, 230 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-11-16 19:20:59,054 INFO L231 Difference]: Finished difference. Result has 64 places, 56 transitions, 132 flow [2024-11-16 19:20:59,055 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=85, PETRI_DIFFERENCE_MINUEND_FLOW=120, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=55, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=132, PETRI_PLACES=64, PETRI_TRANSITIONS=56} [2024-11-16 19:20:59,055 INFO L277 CegarLoopForPetriNet]: 71 programPoint places, -7 predicate places. [2024-11-16 19:20:59,056 INFO L471 AbstractCegarLoop]: Abstraction has has 64 places, 56 transitions, 132 flow [2024-11-16 19:20:59,056 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 30.333333333333332) internal successors, (91), 3 states have internal predecessors, (91), 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) [2024-11-16 19:20:59,056 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-16 19:20:59,056 INFO L204 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 1, 1, 1, 1] [2024-11-16 19:20:59,057 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-11-16 19:20:59,057 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-16 19:20:59,057 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-16 19:20:59,058 INFO L85 PathProgramCache]: Analyzing trace with hash -1620920171, now seen corresponding path program 1 times [2024-11-16 19:20:59,058 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-16 19:20:59,058 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1851199663] [2024-11-16 19:20:59,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 19:20:59,058 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-16 19:20:59,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-11-16 19:20:59,109 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2024-11-16 19:20:59,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-11-16 19:20:59,144 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2024-11-16 19:20:59,145 INFO L325 BasicCegarLoop]: Counterexample is feasible [2024-11-16 19:20:59,146 INFO L782 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2024-11-16 19:20:59,146 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2024-11-16 19:20:59,147 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-11-16 19:20:59,147 INFO L407 BasicCegarLoop]: Path program histogram: [1, 1, 1] [2024-11-16 19:20:59,148 WARN L244 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2024-11-16 19:20:59,148 INFO L489 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2024-11-16 19:20:59,177 INFO L143 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2024-11-16 19:20:59,181 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 93 places, 112 transitions, 251 flow [2024-11-16 19:20:59,205 INFO L124 PetriNetUnfolderBase]: 50/230 cut-off events. [2024-11-16 19:20:59,205 INFO L125 PetriNetUnfolderBase]: For 19/19 co-relation queries the response was YES. [2024-11-16 19:20:59,208 INFO L83 FinitePrefix]: Finished finitePrefix Result has 255 conditions, 230 events. 50/230 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 944 event pairs, 1 based on Foata normal form. 0/172 useless extension candidates. Maximal degree in co-relation 160. Up to 16 conditions per place. [2024-11-16 19:20:59,208 INFO L82 GeneralOperation]: Start removeDead. Operand has 93 places, 112 transitions, 251 flow [2024-11-16 19:20:59,210 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 93 places, 112 transitions, 251 flow [2024-11-16 19:20:59,211 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-16 19:20:59,212 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=LoopHeads, 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;@25dd4cba, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-16 19:20:59,212 INFO L334 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2024-11-16 19:20:59,220 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-11-16 19:20:59,220 INFO L124 PetriNetUnfolderBase]: 7/53 cut-off events. [2024-11-16 19:20:59,221 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2024-11-16 19:20:59,221 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-16 19:20:59,221 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-16 19:20:59,221 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-16 19:20:59,222 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-16 19:20:59,222 INFO L85 PathProgramCache]: Analyzing trace with hash 585932560, now seen corresponding path program 1 times [2024-11-16 19:20:59,222 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-16 19:20:59,223 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1202738057] [2024-11-16 19:20:59,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 19:20:59,223 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-16 19:20:59,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 19:20:59,285 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-16 19:20:59,289 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-16 19:20:59,289 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1202738057] [2024-11-16 19:20:59,290 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1202738057] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-16 19:20:59,290 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-16 19:20:59,290 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-16 19:20:59,290 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [358996714] [2024-11-16 19:20:59,290 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-16 19:20:59,291 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-11-16 19:20:59,291 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-16 19:20:59,291 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-11-16 19:20:59,292 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-11-16 19:20:59,292 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 38 out of 112 [2024-11-16 19:20:59,292 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 93 places, 112 transitions, 251 flow. Second operand has 2 states, 2 states have (on average 41.5) internal successors, (83), 2 states have internal predecessors, (83), 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) [2024-11-16 19:20:59,292 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-16 19:20:59,293 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 38 of 112 [2024-11-16 19:20:59,293 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-16 19:21:07,458 INFO L124 PetriNetUnfolderBase]: 54948/92878 cut-off events. [2024-11-16 19:21:07,459 INFO L125 PetriNetUnfolderBase]: For 1363/1363 co-relation queries the response was YES. [2024-11-16 19:21:07,671 INFO L83 FinitePrefix]: Finished finitePrefix Result has 170466 conditions, 92878 events. 54948/92878 cut-off events. For 1363/1363 co-relation queries the response was YES. Maximal size of possible extension queue 2279. Compared 855573 event pairs, 54791 based on Foata normal form. 39615/129953 useless extension candidates. Maximal degree in co-relation 72099. Up to 76633 conditions per place. [2024-11-16 19:21:07,897 INFO L140 encePairwiseOnDemand]: 89/112 looper letters, 41 selfloop transitions, 0 changer transitions 14/89 dead transitions. [2024-11-16 19:21:07,897 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 94 places, 89 transitions, 307 flow [2024-11-16 19:21:07,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-11-16 19:21:07,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2024-11-16 19:21:07,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 150 transitions. [2024-11-16 19:21:07,901 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6696428571428571 [2024-11-16 19:21:07,901 INFO L175 Difference]: Start difference. First operand has 93 places, 112 transitions, 251 flow. Second operand 2 states and 150 transitions. [2024-11-16 19:21:07,901 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 94 places, 89 transitions, 307 flow [2024-11-16 19:21:07,914 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 94 places, 89 transitions, 307 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-11-16 19:21:07,915 INFO L231 Difference]: Finished difference. Result has 94 places, 75 transitions, 168 flow [2024-11-16 19:21:07,916 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=112, PETRI_DIFFERENCE_MINUEND_FLOW=205, PETRI_DIFFERENCE_MINUEND_PLACES=93, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=89, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=89, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=168, PETRI_PLACES=94, PETRI_TRANSITIONS=75} [2024-11-16 19:21:07,917 INFO L277 CegarLoopForPetriNet]: 93 programPoint places, 1 predicate places. [2024-11-16 19:21:07,917 INFO L471 AbstractCegarLoop]: Abstraction has has 94 places, 75 transitions, 168 flow [2024-11-16 19:21:07,918 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 41.5) internal successors, (83), 2 states have internal predecessors, (83), 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) [2024-11-16 19:21:07,918 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-16 19:21:07,918 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-16 19:21:07,919 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-11-16 19:21:07,919 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-16 19:21:07,920 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-16 19:21:07,920 INFO L85 PathProgramCache]: Analyzing trace with hash 1473032038, now seen corresponding path program 1 times [2024-11-16 19:21:07,920 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-16 19:21:07,920 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1667136948] [2024-11-16 19:21:07,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 19:21:07,920 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-16 19:21:07,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 19:21:07,992 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-16 19:21:07,993 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-16 19:21:07,993 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1667136948] [2024-11-16 19:21:07,993 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1667136948] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-16 19:21:07,993 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-16 19:21:07,994 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-16 19:21:07,994 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1715757867] [2024-11-16 19:21:07,994 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-16 19:21:07,996 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-16 19:21:07,997 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-16 19:21:07,997 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-16 19:21:07,997 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-16 19:21:08,000 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 37 out of 112 [2024-11-16 19:21:08,001 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 94 places, 75 transitions, 168 flow. Second operand has 3 states, 3 states have (on average 39.333333333333336) internal successors, (118), 3 states have internal predecessors, (118), 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) [2024-11-16 19:21:08,001 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-16 19:21:08,001 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 37 of 112 [2024-11-16 19:21:08,003 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-16 19:21:11,872 INFO L124 PetriNetUnfolderBase]: 33410/57088 cut-off events. [2024-11-16 19:21:11,872 INFO L125 PetriNetUnfolderBase]: For 775/775 co-relation queries the response was YES. [2024-11-16 19:21:11,986 INFO L83 FinitePrefix]: Finished finitePrefix Result has 104192 conditions, 57088 events. 33410/57088 cut-off events. For 775/775 co-relation queries the response was YES. Maximal size of possible extension queue 1541. Compared 502083 event pairs, 31010 based on Foata normal form. 0/54191 useless extension candidates. Maximal degree in co-relation 104186. Up to 46567 conditions per place. [2024-11-16 19:21:12,180 INFO L140 encePairwiseOnDemand]: 109/112 looper letters, 52 selfloop transitions, 2 changer transitions 0/87 dead transitions. [2024-11-16 19:21:12,181 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 85 places, 87 transitions, 300 flow [2024-11-16 19:21:12,181 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-16 19:21:12,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-16 19:21:12,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 166 transitions. [2024-11-16 19:21:12,183 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.49404761904761907 [2024-11-16 19:21:12,183 INFO L175 Difference]: Start difference. First operand has 94 places, 75 transitions, 168 flow. Second operand 3 states and 166 transitions. [2024-11-16 19:21:12,183 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 85 places, 87 transitions, 300 flow [2024-11-16 19:21:12,185 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 85 places, 87 transitions, 298 flow, removed 1 selfloop flow, removed 0 redundant places. [2024-11-16 19:21:12,186 INFO L231 Difference]: Finished difference. Result has 86 places, 76 transitions, 178 flow [2024-11-16 19:21:12,187 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=112, PETRI_DIFFERENCE_MINUEND_FLOW=166, PETRI_DIFFERENCE_MINUEND_PLACES=83, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=75, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=178, PETRI_PLACES=86, PETRI_TRANSITIONS=76} [2024-11-16 19:21:12,187 INFO L277 CegarLoopForPetriNet]: 93 programPoint places, -7 predicate places. [2024-11-16 19:21:12,187 INFO L471 AbstractCegarLoop]: Abstraction has has 86 places, 76 transitions, 178 flow [2024-11-16 19:21:12,188 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 39.333333333333336) internal successors, (118), 3 states have internal predecessors, (118), 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) [2024-11-16 19:21:12,188 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-16 19:21:12,188 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-16 19:21:12,188 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-11-16 19:21:12,189 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-16 19:21:12,189 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-16 19:21:12,189 INFO L85 PathProgramCache]: Analyzing trace with hash -253554697, now seen corresponding path program 1 times [2024-11-16 19:21:12,189 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-16 19:21:12,190 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1834067053] [2024-11-16 19:21:12,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 19:21:12,190 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-16 19:21:12,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 19:21:12,270 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-16 19:21:12,270 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-16 19:21:12,271 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1834067053] [2024-11-16 19:21:12,271 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1834067053] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-16 19:21:12,271 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [796388048] [2024-11-16 19:21:12,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 19:21:12,272 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-16 19:21:12,272 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-16 19:21:12,274 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-16 19:21:12,275 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-16 19:21:12,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 19:21:12,461 INFO L255 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-11-16 19:21:12,463 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-16 19:21:12,506 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-16 19:21:12,507 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-16 19:21:12,542 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-16 19:21:12,542 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [796388048] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-16 19:21:12,542 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-16 19:21:12,543 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2024-11-16 19:21:12,543 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [855127299] [2024-11-16 19:21:12,543 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-16 19:21:12,543 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-16 19:21:12,544 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-16 19:21:12,544 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-16 19:21:12,544 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-11-16 19:21:12,545 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 37 out of 112 [2024-11-16 19:21:12,547 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 76 transitions, 178 flow. Second operand has 7 states, 7 states have (on average 39.714285714285715) internal successors, (278), 7 states have internal predecessors, (278), 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) [2024-11-16 19:21:12,547 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-16 19:21:12,547 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 37 of 112 [2024-11-16 19:21:12,547 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-16 19:21:13,945 INFO L124 PetriNetUnfolderBase]: 10250/18644 cut-off events. [2024-11-16 19:21:13,945 INFO L125 PetriNetUnfolderBase]: For 7149/7149 co-relation queries the response was YES. [2024-11-16 19:21:13,992 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35166 conditions, 18644 events. 10250/18644 cut-off events. For 7149/7149 co-relation queries the response was YES. Maximal size of possible extension queue 530. Compared 154099 event pairs, 1056 based on Foata normal form. 1463/19543 useless extension candidates. Maximal degree in co-relation 35158. Up to 9922 conditions per place. [2024-11-16 19:21:14,271 INFO L140 encePairwiseOnDemand]: 109/112 looper letters, 97 selfloop transitions, 4 changer transitions 0/130 dead transitions. [2024-11-16 19:21:14,271 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 81 places, 130 transitions, 488 flow [2024-11-16 19:21:14,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-16 19:21:14,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-16 19:21:14,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 326 transitions. [2024-11-16 19:21:14,273 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4851190476190476 [2024-11-16 19:21:14,273 INFO L175 Difference]: Start difference. First operand has 86 places, 76 transitions, 178 flow. Second operand 6 states and 326 transitions. [2024-11-16 19:21:14,274 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 81 places, 130 transitions, 488 flow [2024-11-16 19:21:14,282 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 130 transitions, 486 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-16 19:21:14,285 INFO L231 Difference]: Finished difference. Result has 80 places, 67 transitions, 166 flow [2024-11-16 19:21:14,285 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=112, PETRI_DIFFERENCE_MINUEND_FLOW=154, PETRI_DIFFERENCE_MINUEND_PLACES=75, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=66, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=166, PETRI_PLACES=80, PETRI_TRANSITIONS=67} [2024-11-16 19:21:14,286 INFO L277 CegarLoopForPetriNet]: 93 programPoint places, -13 predicate places. [2024-11-16 19:21:14,288 INFO L471 AbstractCegarLoop]: Abstraction has has 80 places, 67 transitions, 166 flow [2024-11-16 19:21:14,288 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 39.714285714285715) internal successors, (278), 7 states have internal predecessors, (278), 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) [2024-11-16 19:21:14,289 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-16 19:21:14,289 INFO L204 CegarLoopForPetriNet]: trace histogram [4, 4, 3, 1, 1, 1, 1, 1] [2024-11-16 19:21:14,318 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2024-11-16 19:21:14,489 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-16 19:21:14,490 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-16 19:21:14,490 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-16 19:21:14,491 INFO L85 PathProgramCache]: Analyzing trace with hash -703731855, now seen corresponding path program 1 times [2024-11-16 19:21:14,491 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-16 19:21:14,491 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2031086037] [2024-11-16 19:21:14,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 19:21:14,491 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-16 19:21:14,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-11-16 19:21:14,537 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2024-11-16 19:21:14,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-11-16 19:21:14,564 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2024-11-16 19:21:14,565 INFO L325 BasicCegarLoop]: Counterexample is feasible [2024-11-16 19:21:14,566 INFO L782 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2024-11-16 19:21:14,568 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2024-11-16 19:21:14,568 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-11-16 19:21:14,568 INFO L407 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1] [2024-11-16 19:21:14,569 WARN L244 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2024-11-16 19:21:14,569 INFO L489 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2024-11-16 19:21:14,622 INFO L143 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2024-11-16 19:21:14,625 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 115 places, 139 transitions, 318 flow [2024-11-16 19:21:14,660 INFO L124 PetriNetUnfolderBase]: 81/347 cut-off events. [2024-11-16 19:21:14,660 INFO L125 PetriNetUnfolderBase]: For 48/48 co-relation queries the response was YES. [2024-11-16 19:21:14,664 INFO L83 FinitePrefix]: Finished finitePrefix Result has 398 conditions, 347 events. 81/347 cut-off events. For 48/48 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 1523 event pairs, 6 based on Foata normal form. 0/261 useless extension candidates. Maximal degree in co-relation 254. Up to 32 conditions per place. [2024-11-16 19:21:14,664 INFO L82 GeneralOperation]: Start removeDead. Operand has 115 places, 139 transitions, 318 flow [2024-11-16 19:21:14,668 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 115 places, 139 transitions, 318 flow [2024-11-16 19:21:14,670 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-16 19:21:14,671 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=LoopHeads, 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;@25dd4cba, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-16 19:21:14,671 INFO L334 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2024-11-16 19:21:14,679 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-11-16 19:21:14,679 INFO L124 PetriNetUnfolderBase]: 7/53 cut-off events. [2024-11-16 19:21:14,679 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2024-11-16 19:21:14,680 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-16 19:21:14,680 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-16 19:21:14,680 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-16 19:21:14,680 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-16 19:21:14,680 INFO L85 PathProgramCache]: Analyzing trace with hash 1565820400, now seen corresponding path program 1 times [2024-11-16 19:21:14,681 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-16 19:21:14,682 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1139910418] [2024-11-16 19:21:14,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 19:21:14,682 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-16 19:21:14,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 19:21:14,725 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-16 19:21:14,725 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-16 19:21:14,726 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1139910418] [2024-11-16 19:21:14,726 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1139910418] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-16 19:21:14,726 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-16 19:21:14,729 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-16 19:21:14,729 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [344439600] [2024-11-16 19:21:14,729 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-16 19:21:14,729 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-11-16 19:21:14,729 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-16 19:21:14,730 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-11-16 19:21:14,730 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-11-16 19:21:14,730 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 47 out of 139 [2024-11-16 19:21:14,730 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 115 places, 139 transitions, 318 flow. Second operand has 2 states, 2 states have (on average 50.5) internal successors, (101), 2 states have internal predecessors, (101), 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) [2024-11-16 19:21:14,730 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-16 19:21:14,731 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 47 of 139 [2024-11-16 19:21:14,731 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand