./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-ext/26_stack_cas.i --full-output --traceabstraction.positions.where.we.compute.the.hoare.annotation All --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 448d4d75 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/pthread-ext/26_stack_cas.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 fa97ad6141e9aa8818b694f4968e766701fe7261f516cd86f7a15e5cf1a3d14d --traceabstraction.positions.where.we.compute.the.hoare.annotation All --- Real Ultimate output --- This is Ultimate 0.2.4-tmp.dk.owicki-witnesses-448d4d7-m [2024-02-20 11:28:42,853 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-02-20 11:28:42,888 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-02-20 11:28:42,892 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-02-20 11:28:42,892 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-02-20 11:28:42,905 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-02-20 11:28:42,906 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-02-20 11:28:42,906 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-02-20 11:28:42,907 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-02-20 11:28:42,907 INFO L153 SettingsManager]: * Use memory slicer=true [2024-02-20 11:28:42,907 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-02-20 11:28:42,907 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-02-20 11:28:42,908 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-02-20 11:28:42,908 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-02-20 11:28:42,908 INFO L153 SettingsManager]: * Use SBE=true [2024-02-20 11:28:42,909 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-02-20 11:28:42,909 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-02-20 11:28:42,909 INFO L153 SettingsManager]: * sizeof long=4 [2024-02-20 11:28:42,910 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-02-20 11:28:42,910 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-02-20 11:28:42,910 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-02-20 11:28:42,910 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-02-20 11:28:42,911 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-02-20 11:28:42,911 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-02-20 11:28:42,911 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-02-20 11:28:42,912 INFO L153 SettingsManager]: * sizeof long double=12 [2024-02-20 11:28:42,912 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-02-20 11:28:42,912 INFO L153 SettingsManager]: * Use constant arrays=true [2024-02-20 11:28:42,912 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-02-20 11:28:42,913 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-02-20 11:28:42,913 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-02-20 11:28:42,913 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-02-20 11:28:42,913 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-02-20 11:28:42,914 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-02-20 11:28:42,914 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-02-20 11:28:42,914 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-02-20 11:28:42,914 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-02-20 11:28:42,915 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-02-20 11:28:42,915 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-02-20 11:28:42,915 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-02-20 11:28:42,916 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-02-20 11:28:42,916 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-02-20 11:28:42,916 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-02-20 11:28:42,916 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> fa97ad6141e9aa8818b694f4968e766701fe7261f516cd86f7a15e5cf1a3d14d Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Positions where we compute the Hoare Annotation -> All [2024-02-20 11:28:43,090 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-02-20 11:28:43,111 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-02-20 11:28:43,113 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-02-20 11:28:43,115 INFO L270 PluginConnector]: Initializing CDTParser... [2024-02-20 11:28:43,115 INFO L274 PluginConnector]: CDTParser initialized [2024-02-20 11:28:43,116 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-ext/26_stack_cas.i [2024-02-20 11:28:44,127 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-02-20 11:28:44,355 INFO L384 CDTParser]: Found 1 translation units. [2024-02-20 11:28:44,355 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-ext/26_stack_cas.i [2024-02-20 11:28:44,364 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/158d7e956/7082d32a0c2249fa9e5ebd12da06f7d0/FLAG57de4b601 [2024-02-20 11:28:44,374 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/158d7e956/7082d32a0c2249fa9e5ebd12da06f7d0 [2024-02-20 11:28:44,376 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-02-20 11:28:44,377 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-02-20 11:28:44,378 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-02-20 11:28:44,378 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-02-20 11:28:44,382 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-02-20 11:28:44,383 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.02 11:28:44" (1/1) ... [2024-02-20 11:28:44,383 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5fc1bfcd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.02 11:28:44, skipping insertion in model container [2024-02-20 11:28:44,383 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.02 11:28:44" (1/1) ... [2024-02-20 11:28:44,411 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-02-20 11:28:44,686 WARN L239 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread-ext/26_stack_cas.i[31152,31165] [2024-02-20 11:28:44,697 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-02-20 11:28:44,705 INFO L202 MainTranslator]: Completed pre-run [2024-02-20 11:28:44,742 WARN L239 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread-ext/26_stack_cas.i[31152,31165] [2024-02-20 11:28:44,744 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-02-20 11:28:44,773 INFO L206 MainTranslator]: Completed translation [2024-02-20 11:28:44,774 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.02 11:28:44 WrapperNode [2024-02-20 11:28:44,774 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-02-20 11:28:44,775 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-02-20 11:28:44,775 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-02-20 11:28:44,775 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-02-20 11:28:44,780 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.02 11:28:44" (1/1) ... [2024-02-20 11:28:44,789 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.02 11:28:44" (1/1) ... [2024-02-20 11:28:44,808 INFO L138 Inliner]: procedures = 177, calls = 47, calls flagged for inlining = 16, calls inlined = 19, statements flattened = 188 [2024-02-20 11:28:44,809 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-02-20 11:28:44,809 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-02-20 11:28:44,809 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-02-20 11:28:44,810 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-02-20 11:28:44,820 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.02 11:28:44" (1/1) ... [2024-02-20 11:28:44,820 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.02 11:28:44" (1/1) ... [2024-02-20 11:28:44,823 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.02 11:28:44" (1/1) ... [2024-02-20 11:28:44,835 INFO L175 MemorySlicer]: Split 25 memory accesses to 5 slices as follows [2, 12, 1, 6, 4]. 48 percent of accesses are in the largest equivalence class. The 6 initializations are split as follows [2, 2, 0, 1, 1]. The 10 writes are split as follows [0, 5, 1, 2, 2]. [2024-02-20 11:28:44,836 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.02 11:28:44" (1/1) ... [2024-02-20 11:28:44,836 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.02 11:28:44" (1/1) ... [2024-02-20 11:28:44,842 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.02 11:28:44" (1/1) ... [2024-02-20 11:28:44,859 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.02 11:28:44" (1/1) ... [2024-02-20 11:28:44,861 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.02 11:28:44" (1/1) ... [2024-02-20 11:28:44,862 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.02 11:28:44" (1/1) ... [2024-02-20 11:28:44,865 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-02-20 11:28:44,866 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-02-20 11:28:44,866 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-02-20 11:28:44,866 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-02-20 11:28:44,866 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.02 11:28:44" (1/1) ... [2024-02-20 11:28:44,880 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-02-20 11:28:44,891 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-20 11:28:44,911 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) [2024-02-20 11:28:44,934 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 [2024-02-20 11:28:44,955 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-02-20 11:28:44,955 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-02-20 11:28:44,955 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2024-02-20 11:28:44,955 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#3 [2024-02-20 11:28:44,955 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#4 [2024-02-20 11:28:44,956 INFO L130 BoogieDeclarations]: Found specification of procedure thr1 [2024-02-20 11:28:44,957 INFO L138 BoogieDeclarations]: Found implementation of procedure thr1 [2024-02-20 11:28:44,957 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-02-20 11:28:44,958 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-02-20 11:28:44,958 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2024-02-20 11:28:44,958 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2024-02-20 11:28:44,958 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#4 [2024-02-20 11:28:44,958 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-02-20 11:28:44,958 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-02-20 11:28:44,959 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-02-20 11:28:44,959 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-02-20 11:28:44,959 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-02-20 11:28:44,959 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-02-20 11:28:44,960 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2024-02-20 11:28:44,960 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#4 [2024-02-20 11:28:44,960 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-02-20 11:28:44,960 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-02-20 11:28:44,961 WARN L214 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2024-02-20 11:28:45,083 INFO L244 CfgBuilder]: Building ICFG [2024-02-20 11:28:45,085 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-02-20 11:28:45,307 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-02-20 11:28:45,307 INFO L293 CfgBuilder]: Performing block encoding [2024-02-20 11:28:45,450 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-02-20 11:28:45,450 INFO L320 CfgBuilder]: Removed 3 assume(true) statements. [2024-02-20 11:28:45,451 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.02 11:28:45 BoogieIcfgContainer [2024-02-20 11:28:45,451 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-02-20 11:28:45,453 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-02-20 11:28:45,453 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-02-20 11:28:45,455 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-02-20 11:28:45,455 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.02 11:28:44" (1/3) ... [2024-02-20 11:28:45,456 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7d75b822 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.02 11:28:45, skipping insertion in model container [2024-02-20 11:28:45,456 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.02 11:28:44" (2/3) ... [2024-02-20 11:28:45,457 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7d75b822 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.02 11:28:45, skipping insertion in model container [2024-02-20 11:28:45,457 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.02 11:28:45" (3/3) ... [2024-02-20 11:28:45,458 INFO L112 eAbstractionObserver]: Analyzing ICFG 26_stack_cas.i [2024-02-20 11:28:45,471 INFO L221 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-02-20 11:28:45,472 INFO L180 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-02-20 11:28:45,472 INFO L635 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-02-20 11:28:45,538 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-02-20 11:28:45,570 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 31 places, 34 transitions, 72 flow [2024-02-20 11:28:45,604 INFO L124 PetriNetUnfolderBase]: 6/36 cut-off events. [2024-02-20 11:28:45,605 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-02-20 11:28:45,608 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40 conditions, 36 events. 6/36 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 30 event pairs, 0 based on Foata normal form. 0/27 useless extension candidates. Maximal degree in co-relation 31. Up to 3 conditions per place. [2024-02-20 11:28:45,608 INFO L82 GeneralOperation]: Start removeDead. Operand has 31 places, 34 transitions, 72 flow [2024-02-20 11:28:45,612 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 31 places, 34 transitions, 72 flow [2024-02-20 11:28:45,626 INFO L368 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-02-20 11:28:45,636 INFO L369 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=All, 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;@45e61956, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-02-20 11:28:45,636 INFO L370 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2024-02-20 11:28:45,642 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-02-20 11:28:45,642 INFO L124 PetriNetUnfolderBase]: 0/10 cut-off events. [2024-02-20 11:28:45,643 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-02-20 11:28:45,643 INFO L226 CegarLoopForPetriNet]: Found error trace [2024-02-20 11:28:45,644 INFO L234 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2024-02-20 11:28:45,644 INFO L432 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-02-20 11:28:45,649 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-20 11:28:45,650 INFO L85 PathProgramCache]: Analyzing trace with hash 263342011, now seen corresponding path program 1 times [2024-02-20 11:28:45,658 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-20 11:28:45,659 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [562494274] [2024-02-20 11:28:45,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-20 11:28:45,659 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-20 11:28:45,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-02-20 11:28:45,768 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2024-02-20 11:28:45,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-02-20 11:28:45,888 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2024-02-20 11:28:45,890 INFO L372 BasicCegarLoop]: Counterexample is feasible [2024-02-20 11:28:45,891 INFO L818 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 3 remaining) [2024-02-20 11:28:45,893 INFO L818 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 3 remaining) [2024-02-20 11:28:45,893 INFO L818 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 3 remaining) [2024-02-20 11:28:45,894 WARN L489 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-02-20 11:28:45,894 INFO L457 BasicCegarLoop]: Path program histogram: [1] [2024-02-20 11:28:45,897 WARN L345 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2024-02-20 11:28:45,897 INFO L635 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2024-02-20 11:28:45,943 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-02-20 11:28:45,947 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 56 places, 63 transitions, 136 flow [2024-02-20 11:28:45,959 INFO L124 PetriNetUnfolderBase]: 12/68 cut-off events. [2024-02-20 11:28:45,960 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-02-20 11:28:45,961 INFO L83 FinitePrefix]: Finished finitePrefix Result has 76 conditions, 68 events. 12/68 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 125 event pairs, 0 based on Foata normal form. 0/51 useless extension candidates. Maximal degree in co-relation 59. Up to 3 conditions per place. [2024-02-20 11:28:45,961 INFO L82 GeneralOperation]: Start removeDead. Operand has 56 places, 63 transitions, 136 flow [2024-02-20 11:28:45,961 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 56 places, 63 transitions, 136 flow [2024-02-20 11:28:45,962 INFO L368 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-02-20 11:28:45,963 INFO L369 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=All, 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;@45e61956, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-02-20 11:28:45,963 INFO L370 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2024-02-20 11:28:45,967 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-02-20 11:28:45,967 INFO L124 PetriNetUnfolderBase]: 1/23 cut-off events. [2024-02-20 11:28:45,967 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-02-20 11:28:45,968 INFO L226 CegarLoopForPetriNet]: Found error trace [2024-02-20 11:28:45,968 INFO L234 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1] [2024-02-20 11:28:45,968 INFO L432 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2024-02-20 11:28:45,968 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-20 11:28:45,968 INFO L85 PathProgramCache]: Analyzing trace with hash -437354122, now seen corresponding path program 1 times [2024-02-20 11:28:45,968 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-20 11:28:45,968 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1958651488] [2024-02-20 11:28:45,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-20 11:28:45,969 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-20 11:28:45,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-02-20 11:28:45,986 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2024-02-20 11:28:45,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-02-20 11:28:45,999 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2024-02-20 11:28:45,999 INFO L372 BasicCegarLoop]: Counterexample is feasible [2024-02-20 11:28:45,999 INFO L818 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (3 of 4 remaining) [2024-02-20 11:28:46,000 INFO L818 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 4 remaining) [2024-02-20 11:28:46,000 INFO L818 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 4 remaining) [2024-02-20 11:28:46,000 INFO L818 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 4 remaining) [2024-02-20 11:28:46,000 WARN L489 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-02-20 11:28:46,000 INFO L457 BasicCegarLoop]: Path program histogram: [1] [2024-02-20 11:28:46,001 WARN L345 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2024-02-20 11:28:46,001 INFO L635 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2024-02-20 11:28:46,049 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-02-20 11:28:46,050 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 81 places, 92 transitions, 202 flow [2024-02-20 11:28:46,065 INFO L124 PetriNetUnfolderBase]: 18/100 cut-off events. [2024-02-20 11:28:46,065 INFO L125 PetriNetUnfolderBase]: For 7/7 co-relation queries the response was YES. [2024-02-20 11:28:46,066 INFO L83 FinitePrefix]: Finished finitePrefix Result has 113 conditions, 100 events. 18/100 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 255 event pairs, 0 based on Foata normal form. 0/75 useless extension candidates. Maximal degree in co-relation 87. Up to 4 conditions per place. [2024-02-20 11:28:46,066 INFO L82 GeneralOperation]: Start removeDead. Operand has 81 places, 92 transitions, 202 flow [2024-02-20 11:28:46,067 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 81 places, 92 transitions, 202 flow [2024-02-20 11:28:46,068 INFO L368 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-02-20 11:28:46,069 INFO L369 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=All, 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;@45e61956, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-02-20 11:28:46,069 INFO L370 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2024-02-20 11:28:46,075 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-02-20 11:28:46,075 INFO L124 PetriNetUnfolderBase]: 2/38 cut-off events. [2024-02-20 11:28:46,075 INFO L125 PetriNetUnfolderBase]: For 7/7 co-relation queries the response was YES. [2024-02-20 11:28:46,075 INFO L226 CegarLoopForPetriNet]: Found error trace [2024-02-20 11:28:46,075 INFO L234 CegarLoopForPetriNet]: trace histogram [4, 3, 1, 1, 1, 1, 1] [2024-02-20 11:28:46,075 INFO L432 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-02-20 11:28:46,076 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-20 11:28:46,076 INFO L85 PathProgramCache]: Analyzing trace with hash 979433050, now seen corresponding path program 1 times [2024-02-20 11:28:46,076 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-20 11:28:46,076 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1761307480] [2024-02-20 11:28:46,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-20 11:28:46,076 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-20 11:28:46,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-02-20 11:28:46,093 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2024-02-20 11:28:46,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-02-20 11:28:46,107 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2024-02-20 11:28:46,108 INFO L372 BasicCegarLoop]: Counterexample is feasible [2024-02-20 11:28:46,108 INFO L818 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (4 of 5 remaining) [2024-02-20 11:28:46,108 INFO L818 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (3 of 5 remaining) [2024-02-20 11:28:46,108 INFO L818 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 5 remaining) [2024-02-20 11:28:46,108 INFO L818 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 5 remaining) [2024-02-20 11:28:46,109 INFO L818 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 5 remaining) [2024-02-20 11:28:46,109 WARN L489 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-02-20 11:28:46,109 INFO L457 BasicCegarLoop]: Path program histogram: [1] [2024-02-20 11:28:46,110 WARN L345 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2024-02-20 11:28:46,110 INFO L635 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2024-02-20 11:28:46,196 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-02-20 11:28:46,198 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 106 places, 121 transitions, 270 flow [2024-02-20 11:28:46,235 INFO L124 PetriNetUnfolderBase]: 24/132 cut-off events. [2024-02-20 11:28:46,236 INFO L125 PetriNetUnfolderBase]: For 16/16 co-relation queries the response was YES. [2024-02-20 11:28:46,240 INFO L83 FinitePrefix]: Finished finitePrefix Result has 151 conditions, 132 events. 24/132 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 389 event pairs, 0 based on Foata normal form. 0/99 useless extension candidates. Maximal degree in co-relation 115. Up to 5 conditions per place. [2024-02-20 11:28:46,240 INFO L82 GeneralOperation]: Start removeDead. Operand has 106 places, 121 transitions, 270 flow [2024-02-20 11:28:46,243 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 106 places, 121 transitions, 270 flow [2024-02-20 11:28:46,244 INFO L368 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-02-20 11:28:46,251 INFO L369 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=All, 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;@45e61956, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-02-20 11:28:46,251 INFO L370 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2024-02-20 11:28:46,260 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-02-20 11:28:46,261 INFO L124 PetriNetUnfolderBase]: 4/61 cut-off events. [2024-02-20 11:28:46,261 INFO L125 PetriNetUnfolderBase]: For 16/16 co-relation queries the response was YES. [2024-02-20 11:28:46,261 INFO L226 CegarLoopForPetriNet]: Found error trace [2024-02-20 11:28:46,261 INFO L234 CegarLoopForPetriNet]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1] [2024-02-20 11:28:46,262 INFO L432 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2024-02-20 11:28:46,262 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-20 11:28:46,262 INFO L85 PathProgramCache]: Analyzing trace with hash -1519137790, now seen corresponding path program 1 times [2024-02-20 11:28:46,262 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-20 11:28:46,262 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1114550866] [2024-02-20 11:28:46,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-20 11:28:46,263 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-20 11:28:46,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-02-20 11:28:46,309 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2024-02-20 11:28:46,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-02-20 11:28:46,328 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2024-02-20 11:28:46,330 INFO L372 BasicCegarLoop]: Counterexample is feasible [2024-02-20 11:28:46,330 INFO L818 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (5 of 6 remaining) [2024-02-20 11:28:46,331 INFO L818 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (4 of 6 remaining) [2024-02-20 11:28:46,331 INFO L818 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (3 of 6 remaining) [2024-02-20 11:28:46,331 INFO L818 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 6 remaining) [2024-02-20 11:28:46,331 INFO L818 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 6 remaining) [2024-02-20 11:28:46,332 INFO L818 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 6 remaining) [2024-02-20 11:28:46,332 WARN L489 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-02-20 11:28:46,332 INFO L457 BasicCegarLoop]: Path program histogram: [1] [2024-02-20 11:28:46,333 WARN L345 ceAbstractionStarter]: 4 thread instances were not sufficient, I will increase this number and restart the analysis [2024-02-20 11:28:46,333 INFO L635 ceAbstractionStarter]: Constructing petrified ICFG for 5 thread instances. [2024-02-20 11:28:46,408 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-02-20 11:28:46,414 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 131 places, 150 transitions, 340 flow [2024-02-20 11:28:46,449 INFO L124 PetriNetUnfolderBase]: 30/164 cut-off events. [2024-02-20 11:28:46,450 INFO L125 PetriNetUnfolderBase]: For 30/30 co-relation queries the response was YES. [2024-02-20 11:28:46,451 INFO L83 FinitePrefix]: Finished finitePrefix Result has 190 conditions, 164 events. 30/164 cut-off events. For 30/30 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 531 event pairs, 0 based on Foata normal form. 0/123 useless extension candidates. Maximal degree in co-relation 150. Up to 6 conditions per place. [2024-02-20 11:28:46,451 INFO L82 GeneralOperation]: Start removeDead. Operand has 131 places, 150 transitions, 340 flow [2024-02-20 11:28:46,454 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 131 places, 150 transitions, 340 flow [2024-02-20 11:28:46,455 INFO L368 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-02-20 11:28:46,457 INFO L369 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=All, 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;@45e61956, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-02-20 11:28:46,457 INFO L370 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2024-02-20 11:28:46,467 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-02-20 11:28:46,468 INFO L124 PetriNetUnfolderBase]: 7/77 cut-off events. [2024-02-20 11:28:46,468 INFO L125 PetriNetUnfolderBase]: For 20/20 co-relation queries the response was YES. [2024-02-20 11:28:46,468 INFO L226 CegarLoopForPetriNet]: Found error trace [2024-02-20 11:28:46,468 INFO L234 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-20 11:28:46,469 INFO L432 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2024-02-20 11:28:46,469 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-20 11:28:46,469 INFO L85 PathProgramCache]: Analyzing trace with hash -2100334909, now seen corresponding path program 1 times [2024-02-20 11:28:46,470 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-20 11:28:46,473 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1160275544] [2024-02-20 11:28:46,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-20 11:28:46,473 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-20 11:28:46,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-20 11:28:46,727 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-20 11:28:46,727 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-20 11:28:46,727 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1160275544] [2024-02-20 11:28:46,728 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1160275544] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-20 11:28:46,728 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-20 11:28:46,728 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-02-20 11:28:46,728 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2135143887] [2024-02-20 11:28:46,730 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-20 11:28:46,736 INFO L584 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-02-20 11:28:46,740 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-20 11:28:46,764 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-02-20 11:28:46,765 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-02-20 11:28:46,777 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 25 out of 150 [2024-02-20 11:28:46,780 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 131 places, 150 transitions, 340 flow. Second operand has 5 states, 5 states have (on average 28.0) internal successors, (140), 5 states have internal predecessors, (140), 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) [2024-02-20 11:28:46,780 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-20 11:28:46,780 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 25 of 150 [2024-02-20 11:28:46,781 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand