./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-ext/04_incdec_cas.i --full-output --traceabstraction.positions.where.we.compute.the.hoare.annotation All --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 273a578a 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/04_incdec_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 a025fe4ca65874bde9a09e6a2d9fa9eceda581ed1bc5b23e0ff5285795ed115b --traceabstraction.positions.where.we.compute.the.hoare.annotation All --- Real Ultimate output --- This is Ultimate 0.2.4-tmp.dk.owicki-witnesses-273a578-m [2024-02-19 14:07:48,608 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-02-19 14:07:48,660 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-02-19 14:07:48,664 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-02-19 14:07:48,664 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-02-19 14:07:48,701 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-02-19 14:07:48,701 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-02-19 14:07:48,702 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-02-19 14:07:48,702 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-02-19 14:07:48,705 INFO L153 SettingsManager]: * Use memory slicer=true [2024-02-19 14:07:48,705 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-02-19 14:07:48,706 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-02-19 14:07:48,706 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-02-19 14:07:48,707 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-02-19 14:07:48,707 INFO L153 SettingsManager]: * Use SBE=true [2024-02-19 14:07:48,708 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-02-19 14:07:48,708 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-02-19 14:07:48,708 INFO L153 SettingsManager]: * sizeof long=4 [2024-02-19 14:07:48,708 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-02-19 14:07:48,708 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-02-19 14:07:48,708 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-02-19 14:07:48,709 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-02-19 14:07:48,709 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-02-19 14:07:48,710 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-02-19 14:07:48,710 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-02-19 14:07:48,710 INFO L153 SettingsManager]: * sizeof long double=12 [2024-02-19 14:07:48,710 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-02-19 14:07:48,710 INFO L153 SettingsManager]: * Use constant arrays=true [2024-02-19 14:07:48,711 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-02-19 14:07:48,711 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-02-19 14:07:48,712 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-02-19 14:07:48,712 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-02-19 14:07:48,712 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-02-19 14:07:48,712 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-02-19 14:07:48,713 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-02-19 14:07:48,713 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-02-19 14:07:48,713 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-02-19 14:07:48,713 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-02-19 14:07:48,714 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-02-19 14:07:48,714 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-02-19 14:07:48,714 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-02-19 14:07:48,714 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-02-19 14:07:48,714 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-02-19 14:07:48,714 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> a025fe4ca65874bde9a09e6a2d9fa9eceda581ed1bc5b23e0ff5285795ed115b Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Positions where we compute the Hoare Annotation -> All [2024-02-19 14:07:49,002 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-02-19 14:07:49,021 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-02-19 14:07:49,023 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-02-19 14:07:49,024 INFO L270 PluginConnector]: Initializing CDTParser... [2024-02-19 14:07:49,025 INFO L274 PluginConnector]: CDTParser initialized [2024-02-19 14:07:49,026 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-ext/04_incdec_cas.i [2024-02-19 14:07:50,099 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-02-19 14:07:50,299 INFO L384 CDTParser]: Found 1 translation units. [2024-02-19 14:07:50,299 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-ext/04_incdec_cas.i [2024-02-19 14:07:50,309 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6cd1d0141/c57ae5474ffb411da41459c874084c12/FLAGb6c5be441 [2024-02-19 14:07:50,318 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6cd1d0141/c57ae5474ffb411da41459c874084c12 [2024-02-19 14:07:50,320 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-02-19 14:07:50,321 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-02-19 14:07:50,322 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-02-19 14:07:50,322 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-02-19 14:07:50,325 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-02-19 14:07:50,326 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.02 02:07:50" (1/1) ... [2024-02-19 14:07:50,326 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3fba97f2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.02 02:07:50, skipping insertion in model container [2024-02-19 14:07:50,326 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.02 02:07:50" (1/1) ... [2024-02-19 14:07:50,363 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-02-19 14:07:50,641 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/04_incdec_cas.i[30285,30298] [2024-02-19 14:07:50,653 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/04_incdec_cas.i[30729,30742] [2024-02-19 14:07:50,662 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-02-19 14:07:50,670 INFO L202 MainTranslator]: Completed pre-run [2024-02-19 14:07:50,709 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/04_incdec_cas.i[30285,30298] [2024-02-19 14:07:50,718 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/04_incdec_cas.i[30729,30742] [2024-02-19 14:07:50,724 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-02-19 14:07:50,758 INFO L206 MainTranslator]: Completed translation [2024-02-19 14:07:50,758 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.02 02:07:50 WrapperNode [2024-02-19 14:07:50,759 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-02-19 14:07:50,759 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-02-19 14:07:50,760 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-02-19 14:07:50,760 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-02-19 14:07:50,764 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.02 02:07:50" (1/1) ... [2024-02-19 14:07:50,791 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.02 02:07:50" (1/1) ... [2024-02-19 14:07:50,820 INFO L138 Inliner]: procedures = 172, calls = 43, calls flagged for inlining = 8, calls inlined = 8, statements flattened = 158 [2024-02-19 14:07:50,821 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-02-19 14:07:50,822 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-02-19 14:07:50,822 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-02-19 14:07:50,822 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-02-19 14:07:50,830 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.02 02:07:50" (1/1) ... [2024-02-19 14:07:50,831 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.02 02:07:50" (1/1) ... [2024-02-19 14:07:50,856 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.02 02:07:50" (1/1) ... [2024-02-19 14:07:50,868 INFO L175 MemorySlicer]: Split 24 memory accesses to 5 slices as follows [2, 6, 6, 1, 9]. 38 percent of accesses are in the largest equivalence class. The 5 initializations are split as follows [2, 2, 0, 0, 1]. The 9 writes are split as follows [0, 2, 4, 1, 2]. [2024-02-19 14:07:50,868 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.02 02:07:50" (1/1) ... [2024-02-19 14:07:50,869 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.02 02:07:50" (1/1) ... [2024-02-19 14:07:50,872 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.02 02:07:50" (1/1) ... [2024-02-19 14:07:50,875 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.02 02:07:50" (1/1) ... [2024-02-19 14:07:50,876 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.02 02:07:50" (1/1) ... [2024-02-19 14:07:50,877 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.02 02:07:50" (1/1) ... [2024-02-19 14:07:50,879 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-02-19 14:07:50,880 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-02-19 14:07:50,880 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-02-19 14:07:50,880 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-02-19 14:07:50,881 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.02 02:07:50" (1/1) ... [2024-02-19 14:07:50,885 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-02-19 14:07:50,896 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-19 14:07:50,926 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) [2024-02-19 14:07:50,932 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 [2024-02-19 14:07:50,960 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-02-19 14:07:50,961 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-02-19 14:07:50,961 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2024-02-19 14:07:50,961 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#3 [2024-02-19 14:07:50,961 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#4 [2024-02-19 14:07:50,961 INFO L130 BoogieDeclarations]: Found specification of procedure thr1 [2024-02-19 14:07:50,961 INFO L138 BoogieDeclarations]: Found implementation of procedure thr1 [2024-02-19 14:07:50,962 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-02-19 14:07:50,962 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-02-19 14:07:50,962 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2024-02-19 14:07:50,962 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2024-02-19 14:07:50,962 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#4 [2024-02-19 14:07:50,962 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-02-19 14:07:50,962 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-02-19 14:07:50,963 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-02-19 14:07:50,963 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-02-19 14:07:50,963 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-02-19 14:07:50,963 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-02-19 14:07:50,963 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2024-02-19 14:07:50,963 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#4 [2024-02-19 14:07:50,963 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-02-19 14:07:50,964 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-02-19 14:07:50,965 WARN L214 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2024-02-19 14:07:51,082 INFO L244 CfgBuilder]: Building ICFG [2024-02-19 14:07:51,084 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-02-19 14:07:51,320 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-02-19 14:07:51,321 INFO L293 CfgBuilder]: Performing block encoding [2024-02-19 14:07:51,484 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-02-19 14:07:51,484 INFO L320 CfgBuilder]: Removed 3 assume(true) statements. [2024-02-19 14:07:51,485 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.02 02:07:51 BoogieIcfgContainer [2024-02-19 14:07:51,485 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-02-19 14:07:51,486 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-02-19 14:07:51,486 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-02-19 14:07:51,489 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-02-19 14:07:51,489 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.02 02:07:50" (1/3) ... [2024-02-19 14:07:51,490 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@74e7e9d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.02 02:07:51, skipping insertion in model container [2024-02-19 14:07:51,490 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.02 02:07:50" (2/3) ... [2024-02-19 14:07:51,492 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@74e7e9d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.02 02:07:51, skipping insertion in model container [2024-02-19 14:07:51,492 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.02 02:07:51" (3/3) ... [2024-02-19 14:07:51,493 INFO L112 eAbstractionObserver]: Analyzing ICFG 04_incdec_cas.i [2024-02-19 14:07:51,507 INFO L221 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-02-19 14:07:51,507 INFO L180 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2024-02-19 14:07:51,507 INFO L631 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-02-19 14:07:51,573 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-02-19 14:07:51,598 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 30 places, 34 transitions, 72 flow [2024-02-19 14:07:51,624 INFO L124 PetriNetUnfolderBase]: 7/36 cut-off events. [2024-02-19 14:07:51,624 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-02-19 14:07:51,627 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40 conditions, 36 events. 7/36 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 87 event pairs, 0 based on Foata normal form. 0/25 useless extension candidates. Maximal degree in co-relation 31. Up to 2 conditions per place. [2024-02-19 14:07:51,627 INFO L82 GeneralOperation]: Start removeDead. Operand has 30 places, 34 transitions, 72 flow [2024-02-19 14:07:51,631 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 30 places, 34 transitions, 72 flow [2024-02-19 14:07:51,645 INFO L368 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-02-19 14:07:51,651 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;@5cf445a6, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-02-19 14:07:51,651 INFO L370 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2024-02-19 14:07:51,658 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-02-19 14:07:51,659 INFO L124 PetriNetUnfolderBase]: 0/14 cut-off events. [2024-02-19 14:07:51,659 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-02-19 14:07:51,659 INFO L226 CegarLoopForPetriNet]: Found error trace [2024-02-19 14:07:51,660 INFO L234 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2024-02-19 14:07:51,660 INFO L432 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2024-02-19 14:07:51,665 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-19 14:07:51,665 INFO L85 PathProgramCache]: Analyzing trace with hash 125494199, now seen corresponding path program 1 times [2024-02-19 14:07:51,673 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-19 14:07:51,674 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1585004217] [2024-02-19 14:07:51,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-19 14:07:51,674 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-19 14:07:51,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-02-19 14:07:51,775 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2024-02-19 14:07:51,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-02-19 14:07:51,827 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2024-02-19 14:07:51,829 INFO L372 BasicCegarLoop]: Counterexample is feasible [2024-02-19 14:07:51,830 INFO L818 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (4 of 5 remaining) [2024-02-19 14:07:51,832 INFO L818 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (3 of 5 remaining) [2024-02-19 14:07:51,832 INFO L818 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1ASSERT_VIOLATIONERROR_FUNCTION (2 of 5 remaining) [2024-02-19 14:07:51,833 INFO L818 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 5 remaining) [2024-02-19 14:07:51,833 INFO L818 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1ASSERT_VIOLATIONERROR_FUNCTION (0 of 5 remaining) [2024-02-19 14:07:51,833 WARN L489 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-02-19 14:07:51,834 INFO L457 BasicCegarLoop]: Path program histogram: [1] [2024-02-19 14:07:51,837 WARN L345 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2024-02-19 14:07:51,837 INFO L631 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2024-02-19 14:07:51,912 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-02-19 14:07:51,916 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 54 places, 63 transitions, 136 flow [2024-02-19 14:07:51,935 INFO L124 PetriNetUnfolderBase]: 14/68 cut-off events. [2024-02-19 14:07:51,936 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-02-19 14:07:51,937 INFO L83 FinitePrefix]: Finished finitePrefix Result has 76 conditions, 68 events. 14/68 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 234 event pairs, 0 based on Foata normal form. 0/47 useless extension candidates. Maximal degree in co-relation 59. Up to 3 conditions per place. [2024-02-19 14:07:51,938 INFO L82 GeneralOperation]: Start removeDead. Operand has 54 places, 63 transitions, 136 flow [2024-02-19 14:07:51,940 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 54 places, 63 transitions, 136 flow [2024-02-19 14:07:51,941 INFO L368 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-02-19 14:07:51,942 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;@5cf445a6, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-02-19 14:07:51,942 INFO L370 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2024-02-19 14:07:51,950 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-02-19 14:07:51,951 INFO L124 PetriNetUnfolderBase]: 0/15 cut-off events. [2024-02-19 14:07:51,951 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2024-02-19 14:07:51,951 INFO L226 CegarLoopForPetriNet]: Found error trace [2024-02-19 14:07:51,951 INFO L234 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-02-19 14:07:51,954 INFO L432 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2024-02-19 14:07:51,955 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-19 14:07:51,955 INFO L85 PathProgramCache]: Analyzing trace with hash 1564479877, now seen corresponding path program 1 times [2024-02-19 14:07:51,955 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-19 14:07:51,956 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1282815426] [2024-02-19 14:07:51,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-19 14:07:51,956 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-19 14:07:51,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-19 14:07:52,041 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-19 14:07:52,041 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-19 14:07:52,042 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1282815426] [2024-02-19 14:07:52,043 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1282815426] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-19 14:07:52,043 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-19 14:07:52,044 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-02-19 14:07:52,044 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [936678372] [2024-02-19 14:07:52,045 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-19 14:07:52,065 INFO L584 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-02-19 14:07:52,069 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-19 14:07:52,114 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-02-19 14:07:52,114 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-02-19 14:07:52,116 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 63 [2024-02-19 14:07:52,119 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 63 transitions, 136 flow. Second operand has 2 states, 2 states have (on average 8.5) internal successors, (17), 2 states have internal predecessors, (17), 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) [2024-02-19 14:07:52,119 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-19 14:07:52,119 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 63 [2024-02-19 14:07:52,120 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-19 14:07:52,676 INFO L124 PetriNetUnfolderBase]: 2553/3945 cut-off events. [2024-02-19 14:07:52,676 INFO L125 PetriNetUnfolderBase]: For 60/60 co-relation queries the response was YES. [2024-02-19 14:07:52,683 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7826 conditions, 3945 events. 2553/3945 cut-off events. For 60/60 co-relation queries the response was YES. Maximal size of possible extension queue 171. Compared 20114 event pairs, 1938 based on Foata normal form. 0/3048 useless extension candidates. Maximal degree in co-relation 3620. Up to 3816 conditions per place. [2024-02-19 14:07:52,701 INFO L140 encePairwiseOnDemand]: 58/63 looper letters, 53 selfloop transitions, 0 changer transitions 0/58 dead transitions. [2024-02-19 14:07:52,701 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 58 transitions, 232 flow [2024-02-19 14:07:52,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-02-19 14:07:52,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2024-02-19 14:07:52,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 68 transitions. [2024-02-19 14:07:52,711 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.5396825396825397 [2024-02-19 14:07:52,715 INFO L308 CegarLoopForPetriNet]: 54 programPoint places, 0 predicate places. [2024-02-19 14:07:52,716 INFO L507 AbstractCegarLoop]: Abstraction has has 54 places, 58 transitions, 232 flow [2024-02-19 14:07:52,716 INFO L508 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 8.5) internal successors, (17), 2 states have internal predecessors, (17), 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) [2024-02-19 14:07:52,716 INFO L226 CegarLoopForPetriNet]: Found error trace [2024-02-19 14:07:52,716 INFO L234 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1] [2024-02-19 14:07:52,717 WARN L489 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-02-19 14:07:52,717 INFO L432 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2024-02-19 14:07:52,718 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-19 14:07:52,718 INFO L85 PathProgramCache]: Analyzing trace with hash -1072939074, now seen corresponding path program 1 times [2024-02-19 14:07:52,718 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-19 14:07:52,725 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1168236040] [2024-02-19 14:07:52,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-19 14:07:52,725 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-19 14:07:52,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-02-19 14:07:52,761 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2024-02-19 14:07:52,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-02-19 14:07:52,774 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2024-02-19 14:07:52,774 INFO L372 BasicCegarLoop]: Counterexample is feasible [2024-02-19 14:07:52,775 INFO L818 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (6 of 7 remaining) [2024-02-19 14:07:52,775 INFO L818 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (5 of 7 remaining) [2024-02-19 14:07:52,775 INFO L818 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1ASSERT_VIOLATIONERROR_FUNCTION (4 of 7 remaining) [2024-02-19 14:07:52,775 INFO L818 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (3 of 7 remaining) [2024-02-19 14:07:52,776 INFO L818 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1ASSERT_VIOLATIONERROR_FUNCTION (2 of 7 remaining) [2024-02-19 14:07:52,776 INFO L818 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 7 remaining) [2024-02-19 14:07:52,776 INFO L818 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1ASSERT_VIOLATIONERROR_FUNCTION (0 of 7 remaining) [2024-02-19 14:07:52,776 WARN L489 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-02-19 14:07:52,776 INFO L457 BasicCegarLoop]: Path program histogram: [1, 1] [2024-02-19 14:07:52,777 WARN L345 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2024-02-19 14:07:52,777 INFO L631 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2024-02-19 14:07:52,857 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-02-19 14:07:52,863 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 78 places, 92 transitions, 202 flow [2024-02-19 14:07:52,871 INFO L124 PetriNetUnfolderBase]: 21/100 cut-off events. [2024-02-19 14:07:52,871 INFO L125 PetriNetUnfolderBase]: For 7/7 co-relation queries the response was YES. [2024-02-19 14:07:52,872 INFO L83 FinitePrefix]: Finished finitePrefix Result has 113 conditions, 100 events. 21/100 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 370 event pairs, 0 based on Foata normal form. 0/69 useless extension candidates. Maximal degree in co-relation 87. Up to 4 conditions per place. [2024-02-19 14:07:52,872 INFO L82 GeneralOperation]: Start removeDead. Operand has 78 places, 92 transitions, 202 flow [2024-02-19 14:07:52,873 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 78 places, 92 transitions, 202 flow [2024-02-19 14:07:52,874 INFO L368 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-02-19 14:07:52,875 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;@5cf445a6, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-02-19 14:07:52,875 INFO L370 AbstractCegarLoop]: Starting to check reachability of 9 error locations. [2024-02-19 14:07:52,877 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-02-19 14:07:52,877 INFO L124 PetriNetUnfolderBase]: 0/17 cut-off events. [2024-02-19 14:07:52,877 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2024-02-19 14:07:52,877 INFO L226 CegarLoopForPetriNet]: Found error trace [2024-02-19 14:07:52,877 INFO L234 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-02-19 14:07:52,877 INFO L432 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 6 more)] === [2024-02-19 14:07:52,878 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-19 14:07:52,878 INFO L85 PathProgramCache]: Analyzing trace with hash 63009149, now seen corresponding path program 1 times [2024-02-19 14:07:52,878 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-19 14:07:52,878 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1997766155] [2024-02-19 14:07:52,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-19 14:07:52,878 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-19 14:07:52,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-19 14:07:52,907 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-19 14:07:52,907 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-19 14:07:52,907 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1997766155] [2024-02-19 14:07:52,908 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1997766155] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-19 14:07:52,908 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-19 14:07:52,908 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-02-19 14:07:52,908 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1382646170] [2024-02-19 14:07:52,908 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-19 14:07:52,908 INFO L584 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-02-19 14:07:52,909 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-19 14:07:52,909 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-02-19 14:07:52,909 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-02-19 14:07:52,909 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 92 [2024-02-19 14:07:52,909 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 92 transitions, 202 flow. Second operand has 2 states, 2 states have (on average 10.5) internal successors, (21), 2 states have internal predecessors, (21), 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) [2024-02-19 14:07:52,910 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-19 14:07:52,910 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 92 [2024-02-19 14:07:52,910 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-19 14:07:59,894 INFO L124 PetriNetUnfolderBase]: 81353/109105 cut-off events. [2024-02-19 14:07:59,894 INFO L125 PetriNetUnfolderBase]: For 2624/2624 co-relation queries the response was YES. [2024-02-19 14:08:00,005 INFO L83 FinitePrefix]: Finished finitePrefix Result has 217387 conditions, 109105 events. 81353/109105 cut-off events. For 2624/2624 co-relation queries the response was YES. Maximal size of possible extension queue 3022. Compared 666320 event pairs, 62738 based on Foata normal form. 0/82232 useless extension candidates. Maximal degree in co-relation 14436. Up to 106616 conditions per place. [2024-02-19 14:08:00,456 INFO L140 encePairwiseOnDemand]: 85/92 looper letters, 78 selfloop transitions, 0 changer transitions 0/85 dead transitions. [2024-02-19 14:08:00,457 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 85 transitions, 344 flow [2024-02-19 14:08:00,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-02-19 14:08:00,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2024-02-19 14:08:00,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 99 transitions. [2024-02-19 14:08:00,460 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.5380434782608695 [2024-02-19 14:08:00,461 INFO L308 CegarLoopForPetriNet]: 78 programPoint places, 0 predicate places. [2024-02-19 14:08:00,461 INFO L507 AbstractCegarLoop]: Abstraction has has 78 places, 85 transitions, 344 flow [2024-02-19 14:08:00,461 INFO L508 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 10.5) internal successors, (21), 2 states have internal predecessors, (21), 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) [2024-02-19 14:08:00,461 INFO L226 CegarLoopForPetriNet]: Found error trace [2024-02-19 14:08:00,462 INFO L234 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-19 14:08:00,462 WARN L489 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-02-19 14:08:00,463 INFO L432 AbstractCegarLoop]: === Iteration 2 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 6 more)] === [2024-02-19 14:08:00,463 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-19 14:08:00,463 INFO L85 PathProgramCache]: Analyzing trace with hash 2104811602, now seen corresponding path program 1 times [2024-02-19 14:08:00,463 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-19 14:08:00,464 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [43447875] [2024-02-19 14:08:00,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-19 14:08:00,465 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-19 14:08:00,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-19 14:08:00,944 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-19 14:08:00,944 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-19 14:08:00,944 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [43447875] [2024-02-19 14:08:00,944 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [43447875] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-19 14:08:00,944 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-19 14:08:00,945 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-02-19 14:08:00,945 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [899003308] [2024-02-19 14:08:00,945 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-19 14:08:00,945 INFO L584 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-02-19 14:08:00,946 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-19 14:08:00,947 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-02-19 14:08:00,947 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-02-19 14:08:00,977 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 92 [2024-02-19 14:08:00,978 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 85 transitions, 344 flow. Second operand has 8 states, 8 states have (on average 7.375) internal successors, (59), 8 states have internal predecessors, (59), 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) [2024-02-19 14:08:00,978 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-19 14:08:00,978 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 92 [2024-02-19 14:08:00,978 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-19 14:08:16,189 INFO L124 PetriNetUnfolderBase]: 164208/220771 cut-off events. [2024-02-19 14:08:16,190 INFO L125 PetriNetUnfolderBase]: For 16634/16778 co-relation queries the response was YES. [2024-02-19 14:08:16,425 INFO L83 FinitePrefix]: Finished finitePrefix Result has 652065 conditions, 220771 events. 164208/220771 cut-off events. For 16634/16778 co-relation queries the response was YES. Maximal size of possible extension queue 6424. Compared 1489834 event pairs, 24298 based on Foata normal form. 0/172804 useless extension candidates. Maximal degree in co-relation 205704. Up to 211761 conditions per place. [2024-02-19 14:08:17,455 INFO L140 encePairwiseOnDemand]: 77/92 looper letters, 425 selfloop transitions, 39 changer transitions 0/470 dead transitions. [2024-02-19 14:08:17,455 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 87 places, 470 transitions, 2882 flow [2024-02-19 14:08:17,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-02-19 14:08:17,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-02-19 14:08:17,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 527 transitions. [2024-02-19 14:08:17,459 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.5728260869565217 [2024-02-19 14:08:17,460 INFO L308 CegarLoopForPetriNet]: 78 programPoint places, 9 predicate places. [2024-02-19 14:08:17,460 INFO L507 AbstractCegarLoop]: Abstraction has has 87 places, 470 transitions, 2882 flow [2024-02-19 14:08:17,460 INFO L508 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 7.375) internal successors, (59), 8 states have internal predecessors, (59), 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) [2024-02-19 14:08:17,460 INFO L226 CegarLoopForPetriNet]: Found error trace [2024-02-19 14:08:17,460 INFO L234 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-19 14:08:17,461 WARN L489 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-02-19 14:08:17,461 INFO L432 AbstractCegarLoop]: === Iteration 3 === Targeting thr1Err1ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 6 more)] === [2024-02-19 14:08:17,461 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-19 14:08:17,461 INFO L85 PathProgramCache]: Analyzing trace with hash -1241608266, now seen corresponding path program 1 times [2024-02-19 14:08:17,461 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-19 14:08:17,462 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [915856321] [2024-02-19 14:08:17,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-19 14:08:17,462 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-19 14:08:17,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-19 14:08:17,520 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-19 14:08:17,520 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-19 14:08:17,520 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [915856321] [2024-02-19 14:08:17,521 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [915856321] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-19 14:08:17,521 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-19 14:08:17,521 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-02-19 14:08:17,521 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1258081598] [2024-02-19 14:08:17,521 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-19 14:08:17,522 INFO L584 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-02-19 14:08:17,522 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-19 14:08:17,523 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-02-19 14:08:17,523 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-02-19 14:08:17,526 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 92 [2024-02-19 14:08:17,526 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 87 places, 470 transitions, 2882 flow. Second operand has 4 states, 4 states have (on average 9.5) internal successors, (38), 4 states have internal predecessors, (38), 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) [2024-02-19 14:08:17,527 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-19 14:08:17,527 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 92 [2024-02-19 14:08:17,527 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand