./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/goblint-regression/28-race_reach_36-indirect_racefree.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version a340643f 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/AutomizerReach.xml -i ../../../trunk/examples/svcomp/goblint-regression/28-race_reach_36-indirect_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 3eff698bae51c39e8a3a4c763800dbda831dabb73a169fa31c8e326faee47cd8 --- Real Ultimate output --- This is Ultimate 0.2.4-dev-a340643-m [2024-01-27 15:12:54,807 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-01-27 15:12:54,865 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-01-27 15:12:54,870 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-01-27 15:12:54,871 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-01-27 15:12:54,902 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-01-27 15:12:54,902 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-01-27 15:12:54,903 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-01-27 15:12:54,903 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-01-27 15:12:54,906 INFO L153 SettingsManager]: * Use memory slicer=true [2024-01-27 15:12:54,906 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-01-27 15:12:54,907 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-01-27 15:12:54,907 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-01-27 15:12:54,908 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-01-27 15:12:54,908 INFO L153 SettingsManager]: * Use SBE=true [2024-01-27 15:12:54,909 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-01-27 15:12:54,909 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-01-27 15:12:54,909 INFO L153 SettingsManager]: * sizeof long=4 [2024-01-27 15:12:54,909 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-01-27 15:12:54,910 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-01-27 15:12:54,910 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-01-27 15:12:54,910 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-01-27 15:12:54,910 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-01-27 15:12:54,911 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-01-27 15:12:54,911 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-01-27 15:12:54,911 INFO L153 SettingsManager]: * sizeof long double=12 [2024-01-27 15:12:54,911 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-01-27 15:12:54,911 INFO L153 SettingsManager]: * Use constant arrays=true [2024-01-27 15:12:54,912 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-01-27 15:12:54,912 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-01-27 15:12:54,913 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-01-27 15:12:54,913 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-01-27 15:12:54,913 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-01-27 15:12:54,914 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-01-27 15:12:54,914 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-01-27 15:12:54,914 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-01-27 15:12:54,914 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-01-27 15:12:54,914 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-01-27 15:12:54,914 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-01-27 15:12:54,914 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-01-27 15:12:54,915 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-01-27 15:12:54,915 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-01-27 15:12:54,915 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-01-27 15:12:54,915 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 3eff698bae51c39e8a3a4c763800dbda831dabb73a169fa31c8e326faee47cd8 [2024-01-27 15:12:55,121 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-01-27 15:12:55,154 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-01-27 15:12:55,156 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-01-27 15:12:55,157 INFO L270 PluginConnector]: Initializing CDTParser... [2024-01-27 15:12:55,157 INFO L274 PluginConnector]: CDTParser initialized [2024-01-27 15:12:55,158 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/goblint-regression/28-race_reach_36-indirect_racefree.i [2024-01-27 15:12:56,093 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-01-27 15:12:56,332 INFO L384 CDTParser]: Found 1 translation units. [2024-01-27 15:12:56,333 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/goblint-regression/28-race_reach_36-indirect_racefree.i [2024-01-27 15:12:56,354 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5c7c96be0/ca38555a637e4aa9995564d56e8ef44a/FLAG0a36aab2b [2024-01-27 15:12:56,365 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5c7c96be0/ca38555a637e4aa9995564d56e8ef44a [2024-01-27 15:12:56,366 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-01-27 15:12:56,367 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-01-27 15:12:56,370 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-01-27 15:12:56,370 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-01-27 15:12:56,373 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-01-27 15:12:56,374 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.01 03:12:56" (1/1) ... [2024-01-27 15:12:56,375 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@75ea3681 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:12:56, skipping insertion in model container [2024-01-27 15:12:56,375 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.01 03:12:56" (1/1) ... [2024-01-27 15:12:56,407 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-01-27 15:12:56,634 WARN L239 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/goblint-regression/28-race_reach_36-indirect_racefree.i[30176,30189] [2024-01-27 15:12:56,656 INFO L209 PostProcessor]: Analyzing one entry point: main [2024-01-27 15:12:56,674 INFO L202 MainTranslator]: Completed pre-run [2024-01-27 15:12:56,714 WARN L239 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/goblint-regression/28-race_reach_36-indirect_racefree.i[30176,30189] [2024-01-27 15:12:56,737 INFO L209 PostProcessor]: Analyzing one entry point: main [2024-01-27 15:12:56,823 INFO L206 MainTranslator]: Completed translation [2024-01-27 15:12:56,824 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:12:56 WrapperNode [2024-01-27 15:12:56,824 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-01-27 15:12:56,825 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-01-27 15:12:56,825 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-01-27 15:12:56,825 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-01-27 15:12:56,830 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:12:56" (1/1) ... [2024-01-27 15:12:56,853 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:12:56" (1/1) ... [2024-01-27 15:12:56,869 INFO L138 Inliner]: procedures = 171, calls = 42, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 84 [2024-01-27 15:12:56,869 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-01-27 15:12:56,870 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-01-27 15:12:56,870 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-01-27 15:12:56,870 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-01-27 15:12:56,878 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:12:56" (1/1) ... [2024-01-27 15:12:56,879 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:12:56" (1/1) ... [2024-01-27 15:12:56,888 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:12:56" (1/1) ... [2024-01-27 15:12:56,901 INFO L175 MemorySlicer]: Split 20 memory accesses to 5 slices as follows [2, 5, 6, 5, 2]. 30 percent of accesses are in the largest equivalence class. The 13 initializations are split as follows [2, 5, 1, 5, 0]. The 3 writes are split as follows [0, 0, 2, 0, 1]. [2024-01-27 15:12:56,902 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:12:56" (1/1) ... [2024-01-27 15:12:56,902 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:12:56" (1/1) ... [2024-01-27 15:12:56,907 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:12:56" (1/1) ... [2024-01-27 15:12:56,909 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:12:56" (1/1) ... [2024-01-27 15:12:56,910 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:12:56" (1/1) ... [2024-01-27 15:12:56,911 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:12:56" (1/1) ... [2024-01-27 15:12:56,913 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-01-27 15:12:56,914 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-01-27 15:12:56,914 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-01-27 15:12:56,914 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-01-27 15:12:56,915 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:12:56" (1/1) ... [2024-01-27 15:12:56,932 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-01-27 15:12:56,942 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:12:56,956 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) [2024-01-27 15:12:56,967 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 [2024-01-27 15:12:57,005 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-01-27 15:12:57,005 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-01-27 15:12:57,005 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2024-01-27 15:12:57,005 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#3 [2024-01-27 15:12:57,006 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#4 [2024-01-27 15:12:57,006 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-01-27 15:12:57,007 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-01-27 15:12:57,007 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2024-01-27 15:12:57,007 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2024-01-27 15:12:57,007 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#4 [2024-01-27 15:12:57,007 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2024-01-27 15:12:57,008 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-01-27 15:12:57,008 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-01-27 15:12:57,008 INFO L130 BoogieDeclarations]: Found specification of procedure t_fun [2024-01-27 15:12:57,008 INFO L138 BoogieDeclarations]: Found implementation of procedure t_fun [2024-01-27 15:12:57,008 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-01-27 15:12:57,008 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-01-27 15:12:57,008 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-01-27 15:12:57,008 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-01-27 15:12:57,009 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2024-01-27 15:12:57,009 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#4 [2024-01-27 15:12:57,009 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexUnlock [2024-01-27 15:12:57,009 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-01-27 15:12:57,009 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-01-27 15:12:57,011 WARN L214 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2024-01-27 15:12:57,112 INFO L244 CfgBuilder]: Building ICFG [2024-01-27 15:12:57,114 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-01-27 15:12:57,294 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-01-27 15:12:57,294 INFO L293 CfgBuilder]: Performing block encoding [2024-01-27 15:12:57,405 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-01-27 15:12:57,405 INFO L320 CfgBuilder]: Removed 10 assume(true) statements. [2024-01-27 15:12:57,405 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.01 03:12:57 BoogieIcfgContainer [2024-01-27 15:12:57,405 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-01-27 15:12:57,407 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-01-27 15:12:57,407 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-01-27 15:12:57,410 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-01-27 15:12:57,410 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.01 03:12:56" (1/3) ... [2024-01-27 15:12:57,410 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@497c4834 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.01 03:12:57, skipping insertion in model container [2024-01-27 15:12:57,410 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:12:56" (2/3) ... [2024-01-27 15:12:57,410 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@497c4834 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.01 03:12:57, skipping insertion in model container [2024-01-27 15:12:57,411 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.01 03:12:57" (3/3) ... [2024-01-27 15:12:57,412 INFO L112 eAbstractionObserver]: Analyzing ICFG 28-race_reach_36-indirect_racefree.i [2024-01-27 15:12:57,418 WARN L146 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2024-01-27 15:12:57,425 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-01-27 15:12:57,426 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-01-27 15:12:57,426 INFO L518 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-01-27 15:12:57,455 INFO L144 ThreadInstanceAdder]: Constructed 1 joinOtherThreadTransitions. [2024-01-27 15:12:57,482 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 42 places, 49 transitions, 105 flow [2024-01-27 15:12:57,517 INFO L124 PetriNetUnfolderBase]: 13/69 cut-off events. [2024-01-27 15:12:57,517 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2024-01-27 15:12:57,521 INFO L83 FinitePrefix]: Finished finitePrefix Result has 74 conditions, 69 events. 13/69 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 226 event pairs, 0 based on Foata normal form. 0/51 useless extension candidates. Maximal degree in co-relation 44. Up to 4 conditions per place. [2024-01-27 15:12:57,521 INFO L82 GeneralOperation]: Start removeDead. Operand has 42 places, 49 transitions, 105 flow [2024-01-27 15:12:57,526 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 41 places, 47 transitions, 98 flow [2024-01-27 15:12:57,542 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-01-27 15:12:57,549 INFO L357 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, mHoare=true, 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;@491fd315, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-01-27 15:12:57,549 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2024-01-27 15:12:57,557 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-01-27 15:12:57,557 INFO L124 PetriNetUnfolderBase]: 0/13 cut-off events. [2024-01-27 15:12:57,557 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-01-27 15:12:57,558 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:12:57,558 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2024-01-27 15:12:57,559 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-27 15:12:57,564 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:12:57,564 INFO L85 PathProgramCache]: Analyzing trace with hash 1776220640, now seen corresponding path program 1 times [2024-01-27 15:12:57,572 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:12:57,574 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2145008480] [2024-01-27 15:12:57,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:12:57,575 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:12:57,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-01-27 15:12:57,701 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2024-01-27 15:12:57,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-01-27 15:12:57,790 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2024-01-27 15:12:57,793 INFO L360 BasicCegarLoop]: Counterexample is feasible [2024-01-27 15:12:57,794 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2024-01-27 15:12:57,796 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2024-01-27 15:12:57,809 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-01-27 15:12:57,810 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2024-01-27 15:12:57,812 WARN L234 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2024-01-27 15:12:57,812 INFO L518 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2024-01-27 15:12:57,839 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2024-01-27 15:12:57,844 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 62 places, 74 transitions, 164 flow [2024-01-27 15:12:57,872 INFO L124 PetriNetUnfolderBase]: 24/121 cut-off events. [2024-01-27 15:12:57,873 INFO L125 PetriNetUnfolderBase]: For 6/6 co-relation queries the response was YES. [2024-01-27 15:12:57,874 INFO L83 FinitePrefix]: Finished finitePrefix Result has 133 conditions, 121 events. 24/121 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 477 event pairs, 0 based on Foata normal form. 0/90 useless extension candidates. Maximal degree in co-relation 73. Up to 6 conditions per place. [2024-01-27 15:12:57,875 INFO L82 GeneralOperation]: Start removeDead. Operand has 62 places, 74 transitions, 164 flow [2024-01-27 15:12:57,876 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 62 places, 74 transitions, 164 flow [2024-01-27 15:12:57,878 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-01-27 15:12:57,879 INFO L357 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, mHoare=true, 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;@491fd315, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-01-27 15:12:57,879 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2024-01-27 15:12:57,889 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-01-27 15:12:57,890 INFO L124 PetriNetUnfolderBase]: 1/37 cut-off events. [2024-01-27 15:12:57,890 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-01-27 15:12:57,890 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:12:57,891 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:12:57,891 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-27 15:12:57,892 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:12:57,892 INFO L85 PathProgramCache]: Analyzing trace with hash -58963333, now seen corresponding path program 1 times [2024-01-27 15:12:57,892 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:12:57,892 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [937663652] [2024-01-27 15:12:57,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:12:57,896 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:12:57,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:12:58,051 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:12:58,053 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:12:58,054 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [937663652] [2024-01-27 15:12:58,054 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [937663652] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-27 15:12:58,054 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-27 15:12:58,054 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-01-27 15:12:58,055 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2029599080] [2024-01-27 15:12:58,056 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-27 15:12:58,061 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-01-27 15:12:58,068 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:12:58,091 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-01-27 15:12:58,091 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-01-27 15:12:58,094 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 23 out of 74 [2024-01-27 15:12:58,096 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 74 transitions, 164 flow. Second operand has 3 states, 3 states have (on average 24.666666666666668) internal successors, (74), 3 states have internal predecessors, (74), 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) [2024-01-27 15:12:58,097 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:12:58,097 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 23 of 74 [2024-01-27 15:12:58,097 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:12:58,614 INFO L124 PetriNetUnfolderBase]: 2414/4774 cut-off events. [2024-01-27 15:12:58,614 INFO L125 PetriNetUnfolderBase]: For 57/57 co-relation queries the response was YES. [2024-01-27 15:12:58,624 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8732 conditions, 4774 events. 2414/4774 cut-off events. For 57/57 co-relation queries the response was YES. Maximal size of possible extension queue 166. Compared 33845 event pairs, 2252 based on Foata normal form. 1289/5707 useless extension candidates. Maximal degree in co-relation 6402. Up to 3889 conditions per place. [2024-01-27 15:12:58,636 INFO L140 encePairwiseOnDemand]: 56/74 looper letters, 36 selfloop transitions, 2 changer transitions 11/70 dead transitions. [2024-01-27 15:12:58,636 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 70 transitions, 250 flow [2024-01-27 15:12:58,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-01-27 15:12:58,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-01-27 15:12:58,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 138 transitions. [2024-01-27 15:12:58,646 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6216216216216216 [2024-01-27 15:12:58,648 INFO L175 Difference]: Start difference. First operand has 62 places, 74 transitions, 164 flow. Second operand 3 states and 138 transitions. [2024-01-27 15:12:58,649 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 70 transitions, 250 flow [2024-01-27 15:12:58,653 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 70 transitions, 250 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-01-27 15:12:58,655 INFO L231 Difference]: Finished difference. Result has 65 places, 49 transitions, 118 flow [2024-01-27 15:12:58,657 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=74, PETRI_DIFFERENCE_MINUEND_FLOW=134, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=118, PETRI_PLACES=65, PETRI_TRANSITIONS=49} [2024-01-27 15:12:58,660 INFO L281 CegarLoopForPetriNet]: 62 programPoint places, 3 predicate places. [2024-01-27 15:12:58,660 INFO L495 AbstractCegarLoop]: Abstraction has has 65 places, 49 transitions, 118 flow [2024-01-27 15:12:58,661 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 24.666666666666668) internal successors, (74), 3 states have internal predecessors, (74), 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) [2024-01-27 15:12:58,661 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:12:58,661 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1] [2024-01-27 15:12:58,661 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-01-27 15:12:58,662 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-27 15:12:58,663 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:12:58,663 INFO L85 PathProgramCache]: Analyzing trace with hash -1012946864, now seen corresponding path program 1 times [2024-01-27 15:12:58,663 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:12:58,663 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [725438265] [2024-01-27 15:12:58,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:12:58,664 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:12:58,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-01-27 15:12:58,712 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2024-01-27 15:12:58,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-01-27 15:12:58,738 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2024-01-27 15:12:58,738 INFO L360 BasicCegarLoop]: Counterexample is feasible [2024-01-27 15:12:58,738 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2024-01-27 15:12:58,746 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2024-01-27 15:12:58,747 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-01-27 15:12:58,747 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1] [2024-01-27 15:12:58,747 WARN L234 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2024-01-27 15:12:58,748 INFO L518 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2024-01-27 15:12:58,774 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2024-01-27 15:12:58,777 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 82 places, 99 transitions, 225 flow [2024-01-27 15:12:58,789 INFO L124 PetriNetUnfolderBase]: 38/184 cut-off events. [2024-01-27 15:12:58,790 INFO L125 PetriNetUnfolderBase]: For 19/19 co-relation queries the response was YES. [2024-01-27 15:12:58,791 INFO L83 FinitePrefix]: Finished finitePrefix Result has 209 conditions, 184 events. 38/184 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 784 event pairs, 1 based on Foata normal form. 0/138 useless extension candidates. Maximal degree in co-relation 132. Up to 12 conditions per place. [2024-01-27 15:12:58,792 INFO L82 GeneralOperation]: Start removeDead. Operand has 82 places, 99 transitions, 225 flow [2024-01-27 15:12:58,793 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 82 places, 99 transitions, 225 flow [2024-01-27 15:12:58,794 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-01-27 15:12:58,796 INFO L357 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, mHoare=true, 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;@491fd315, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-01-27 15:12:58,796 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2024-01-27 15:12:58,799 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-01-27 15:12:58,799 INFO L124 PetriNetUnfolderBase]: 1/37 cut-off events. [2024-01-27 15:12:58,799 INFO L125 PetriNetUnfolderBase]: For 4/4 co-relation queries the response was YES. [2024-01-27 15:12:58,800 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:12:58,800 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:12:58,800 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-27 15:12:58,800 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:12:58,801 INFO L85 PathProgramCache]: Analyzing trace with hash 1277881339, now seen corresponding path program 1 times [2024-01-27 15:12:58,801 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:12:58,801 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1321705472] [2024-01-27 15:12:58,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:12:58,801 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:12:58,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:12:58,852 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:12:58,853 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:12:58,853 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1321705472] [2024-01-27 15:12:58,853 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1321705472] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-27 15:12:58,853 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-27 15:12:58,853 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-01-27 15:12:58,854 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [242440800] [2024-01-27 15:12:58,854 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-27 15:12:58,854 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-01-27 15:12:58,855 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:12:58,855 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-01-27 15:12:58,855 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-01-27 15:12:58,856 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 31 out of 99 [2024-01-27 15:12:58,857 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 82 places, 99 transitions, 225 flow. Second operand has 3 states, 3 states have (on average 32.666666666666664) internal successors, (98), 3 states have internal predecessors, (98), 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) [2024-01-27 15:12:58,857 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:12:58,857 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 31 of 99 [2024-01-27 15:12:58,857 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:13:03,562 INFO L124 PetriNetUnfolderBase]: 38401/62918 cut-off events. [2024-01-27 15:13:03,563 INFO L125 PetriNetUnfolderBase]: For 1137/1137 co-relation queries the response was YES. [2024-01-27 15:13:03,630 INFO L83 FinitePrefix]: Finished finitePrefix Result has 117545 conditions, 62918 events. 38401/62918 cut-off events. For 1137/1137 co-relation queries the response was YES. Maximal size of possible extension queue 1620. Compared 538981 event pairs, 36768 based on Foata normal form. 19074/78040 useless extension candidates. Maximal degree in co-relation 68573. Up to 53816 conditions per place. [2024-01-27 15:13:03,755 INFO L140 encePairwiseOnDemand]: 75/99 looper letters, 46 selfloop transitions, 2 changer transitions 12/89 dead transitions. [2024-01-27 15:13:03,756 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 84 places, 89 transitions, 321 flow [2024-01-27 15:13:03,756 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-01-27 15:13:03,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-01-27 15:13:03,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 179 transitions. [2024-01-27 15:13:03,757 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6026936026936027 [2024-01-27 15:13:03,758 INFO L175 Difference]: Start difference. First operand has 82 places, 99 transitions, 225 flow. Second operand 3 states and 179 transitions. [2024-01-27 15:13:03,758 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 84 places, 89 transitions, 321 flow [2024-01-27 15:13:03,760 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 84 places, 89 transitions, 321 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-01-27 15:13:03,761 INFO L231 Difference]: Finished difference. Result has 85 places, 67 transitions, 162 flow [2024-01-27 15:13:03,762 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=99, PETRI_DIFFERENCE_MINUEND_FLOW=183, PETRI_DIFFERENCE_MINUEND_PLACES=82, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=78, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=76, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=162, PETRI_PLACES=85, PETRI_TRANSITIONS=67} [2024-01-27 15:13:03,762 INFO L281 CegarLoopForPetriNet]: 82 programPoint places, 3 predicate places. [2024-01-27 15:13:03,762 INFO L495 AbstractCegarLoop]: Abstraction has has 85 places, 67 transitions, 162 flow [2024-01-27 15:13:03,763 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 32.666666666666664) internal successors, (98), 3 states have internal predecessors, (98), 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) [2024-01-27 15:13:03,763 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:13:03,763 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:13:03,763 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-01-27 15:13:03,763 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-27 15:13:03,764 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:13:03,764 INFO L85 PathProgramCache]: Analyzing trace with hash -254172282, now seen corresponding path program 1 times [2024-01-27 15:13:03,764 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:13:03,764 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [259500812] [2024-01-27 15:13:03,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:13:03,765 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:13:03,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:13:03,798 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:13:03,798 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:13:03,798 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [259500812] [2024-01-27 15:13:03,798 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [259500812] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:13:03,799 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2047989383] [2024-01-27 15:13:03,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:13:03,799 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:13:03,799 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:13:03,800 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) [2024-01-27 15:13:03,814 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-01-27 15:13:03,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:13:03,891 INFO L262 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 3 conjunts are in the unsatisfiable core [2024-01-27 15:13:03,892 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:13:03,918 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:13:03,919 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:13:03,938 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:13:03,938 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2047989383] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:13:03,938 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:13:03,939 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2024-01-27 15:13:03,939 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [832707880] [2024-01-27 15:13:03,939 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:13:03,939 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-01-27 15:13:03,940 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:13:03,940 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-01-27 15:13:03,940 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-01-27 15:13:03,941 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 31 out of 99 [2024-01-27 15:13:03,952 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 85 places, 67 transitions, 162 flow. Second operand has 7 states, 7 states have (on average 33.42857142857143) internal successors, (234), 7 states have internal predecessors, (234), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:13:03,952 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:13:03,952 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 31 of 99 [2024-01-27 15:13:03,952 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:13:04,897 INFO L124 PetriNetUnfolderBase]: 7668/13448 cut-off events. [2024-01-27 15:13:04,898 INFO L125 PetriNetUnfolderBase]: For 2939/2939 co-relation queries the response was YES. [2024-01-27 15:13:04,923 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26008 conditions, 13448 events. 7668/13448 cut-off events. For 2939/2939 co-relation queries the response was YES. Maximal size of possible extension queue 442. Compared 101554 event pairs, 1890 based on Foata normal form. 1110/14454 useless extension candidates. Maximal degree in co-relation 2662. Up to 7400 conditions per place. [2024-01-27 15:13:04,975 INFO L140 encePairwiseOnDemand]: 96/99 looper letters, 88 selfloop transitions, 4 changer transitions 0/117 dead transitions. [2024-01-27 15:13:04,976 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 117 transitions, 446 flow [2024-01-27 15:13:04,976 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-01-27 15:13:04,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-01-27 15:13:04,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 281 transitions. [2024-01-27 15:13:04,978 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4730639730639731 [2024-01-27 15:13:04,978 INFO L175 Difference]: Start difference. First operand has 85 places, 67 transitions, 162 flow. Second operand 6 states and 281 transitions. [2024-01-27 15:13:04,978 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 117 transitions, 446 flow [2024-01-27 15:13:04,980 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 117 transitions, 442 flow, removed 1 selfloop flow, removed 1 redundant places. [2024-01-27 15:13:04,981 INFO L231 Difference]: Finished difference. Result has 72 places, 60 transitions, 152 flow [2024-01-27 15:13:04,982 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=99, PETRI_DIFFERENCE_MINUEND_FLOW=140, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=152, PETRI_PLACES=72, PETRI_TRANSITIONS=60} [2024-01-27 15:13:04,982 INFO L281 CegarLoopForPetriNet]: 82 programPoint places, -10 predicate places. [2024-01-27 15:13:04,982 INFO L495 AbstractCegarLoop]: Abstraction has has 72 places, 60 transitions, 152 flow [2024-01-27 15:13:04,983 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 33.42857142857143) internal successors, (234), 7 states have internal predecessors, (234), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:13:04,983 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:13:04,983 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 1, 1, 1, 1, 1] [2024-01-27 15:13:04,998 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2024-01-27 15:13:05,194 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:13:05,195 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-27 15:13:05,196 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:13:05,196 INFO L85 PathProgramCache]: Analyzing trace with hash 1351477279, now seen corresponding path program 1 times [2024-01-27 15:13:05,196 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:13:05,196 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [99147825] [2024-01-27 15:13:05,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:13:05,196 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:13:05,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-01-27 15:13:05,216 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2024-01-27 15:13:05,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-01-27 15:13:05,250 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2024-01-27 15:13:05,250 INFO L360 BasicCegarLoop]: Counterexample is feasible [2024-01-27 15:13:05,251 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2024-01-27 15:13:05,251 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2024-01-27 15:13:05,251 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-01-27 15:13:05,251 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1] [2024-01-27 15:13:05,252 WARN L234 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2024-01-27 15:13:05,252 INFO L518 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2024-01-27 15:13:05,278 INFO L144 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2024-01-27 15:13:05,282 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 102 places, 124 transitions, 288 flow [2024-01-27 15:13:05,302 INFO L124 PetriNetUnfolderBase]: 60/271 cut-off events. [2024-01-27 15:13:05,302 INFO L125 PetriNetUnfolderBase]: For 48/48 co-relation queries the response was YES. [2024-01-27 15:13:05,303 INFO L83 FinitePrefix]: Finished finitePrefix Result has 322 conditions, 271 events. 60/271 cut-off events. For 48/48 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 1218 event pairs, 6 based on Foata normal form. 0/206 useless extension candidates. Maximal degree in co-relation 208. Up to 32 conditions per place. [2024-01-27 15:13:05,304 INFO L82 GeneralOperation]: Start removeDead. Operand has 102 places, 124 transitions, 288 flow [2024-01-27 15:13:05,306 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 102 places, 124 transitions, 288 flow [2024-01-27 15:13:05,307 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-01-27 15:13:05,312 INFO L357 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, mHoare=true, 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;@491fd315, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-01-27 15:13:05,313 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2024-01-27 15:13:05,316 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-01-27 15:13:05,316 INFO L124 PetriNetUnfolderBase]: 1/37 cut-off events. [2024-01-27 15:13:05,317 INFO L125 PetriNetUnfolderBase]: For 4/4 co-relation queries the response was YES. [2024-01-27 15:13:05,317 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:13:05,317 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:13:05,317 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-27 15:13:05,317 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:13:05,318 INFO L85 PathProgramCache]: Analyzing trace with hash 392686075, now seen corresponding path program 1 times [2024-01-27 15:13:05,318 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:13:05,320 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1583096016] [2024-01-27 15:13:05,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:13:05,321 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:13:05,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:13:05,348 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:13:05,349 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:13:05,349 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1583096016] [2024-01-27 15:13:05,349 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1583096016] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-27 15:13:05,349 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-27 15:13:05,350 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-01-27 15:13:05,350 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1337651037] [2024-01-27 15:13:05,350 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-27 15:13:05,350 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-01-27 15:13:05,350 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:13:05,351 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-01-27 15:13:05,351 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-01-27 15:13:05,352 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 39 out of 124 [2024-01-27 15:13:05,353 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 102 places, 124 transitions, 288 flow. Second operand has 3 states, 3 states have (on average 40.666666666666664) internal successors, (122), 3 states have internal predecessors, (122), 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) [2024-01-27 15:13:05,353 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:13:05,353 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 39 of 124 [2024-01-27 15:13:05,353 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand