./Ultimate.py --spec /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/properties/unreach-call.prp --file /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/pthread-atomic/peterson.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 84cfde4a Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/pthread-atomic/peterson.i -s /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate-clean/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 ee3d1a41e169e13d6fb9bc974b1d8f7c8de5421cb2dfbc7e3d9a400662188398 --- Real Ultimate output --- This is Ultimate 0.2.5-dev-84cfde4 [2024-10-11 14:10:21,184 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-10-11 14:10:21,268 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-10-11 14:10:21,273 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-10-11 14:10:21,273 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-10-11 14:10:21,304 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-10-11 14:10:21,305 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-10-11 14:10:21,305 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-10-11 14:10:21,306 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-10-11 14:10:21,306 INFO L153 SettingsManager]: * Use memory slicer=true [2024-10-11 14:10:21,307 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-10-11 14:10:21,307 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-10-11 14:10:21,308 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-10-11 14:10:21,308 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-10-11 14:10:21,309 INFO L153 SettingsManager]: * Use SBE=true [2024-10-11 14:10:21,309 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-10-11 14:10:21,309 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-10-11 14:10:21,310 INFO L153 SettingsManager]: * sizeof long=4 [2024-10-11 14:10:21,310 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-10-11 14:10:21,310 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-10-11 14:10:21,311 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-10-11 14:10:21,311 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-10-11 14:10:21,312 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-10-11 14:10:21,312 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-10-11 14:10:21,312 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-10-11 14:10:21,313 INFO L153 SettingsManager]: * sizeof long double=12 [2024-10-11 14:10:21,313 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-10-11 14:10:21,313 INFO L153 SettingsManager]: * Use constant arrays=true [2024-10-11 14:10:21,314 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-10-11 14:10:21,314 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-10-11 14:10:21,314 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-10-11 14:10:21,315 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-10-11 14:10:21,315 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-11 14:10:21,315 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-10-11 14:10:21,316 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-10-11 14:10:21,316 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-10-11 14:10:21,316 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-10-11 14:10:21,316 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-10-11 14:10:21,317 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-10-11 14:10:21,317 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-10-11 14:10:21,317 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-10-11 14:10:21,318 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-10-11 14:10:21,318 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-clean/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> ee3d1a41e169e13d6fb9bc974b1d8f7c8de5421cb2dfbc7e3d9a400662188398 [2024-10-11 14:10:21,558 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-10-11 14:10:21,580 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-10-11 14:10:21,583 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-10-11 14:10:21,584 INFO L270 PluginConnector]: Initializing CDTParser... [2024-10-11 14:10:21,585 INFO L274 PluginConnector]: CDTParser initialized [2024-10-11 14:10:21,586 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/pthread-atomic/peterson.i [2024-10-11 14:10:22,991 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-10-11 14:10:23,194 INFO L384 CDTParser]: Found 1 translation units. [2024-10-11 14:10:23,195 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/pthread-atomic/peterson.i [2024-10-11 14:10:23,208 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/data/914564829/868f8f808a784d66bfdc69851064321f/FLAGf45d017bd [2024-10-11 14:10:23,550 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/data/914564829/868f8f808a784d66bfdc69851064321f [2024-10-11 14:10:23,552 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-10-11 14:10:23,554 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-10-11 14:10:23,555 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-10-11 14:10:23,555 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-10-11 14:10:23,560 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-10-11 14:10:23,561 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.10 02:10:23" (1/1) ... [2024-10-11 14:10:23,562 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@14dbead7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:10:23, skipping insertion in model container [2024-10-11 14:10:23,562 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.10 02:10:23" (1/1) ... [2024-10-11 14:10:23,603 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-10-11 14:10:23,906 WARN L248 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/pthread-atomic/peterson.i[30997,31010] [2024-10-11 14:10:23,915 WARN L248 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/pthread-atomic/peterson.i[31682,31695] [2024-10-11 14:10:23,923 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-11 14:10:23,934 INFO L200 MainTranslator]: Completed pre-run [2024-10-11 14:10:23,997 WARN L248 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/pthread-atomic/peterson.i[30997,31010] [2024-10-11 14:10:23,999 WARN L248 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/pthread-atomic/peterson.i[31682,31695] [2024-10-11 14:10:24,003 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-11 14:10:24,046 INFO L204 MainTranslator]: Completed translation [2024-10-11 14:10:24,046 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:10:24 WrapperNode [2024-10-11 14:10:24,047 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-10-11 14:10:24,048 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-10-11 14:10:24,049 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-10-11 14:10:24,049 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-10-11 14:10:24,056 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:10:24" (1/1) ... [2024-10-11 14:10:24,072 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:10:24" (1/1) ... [2024-10-11 14:10:24,093 INFO L138 Inliner]: procedures = 169, calls = 36, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 30 [2024-10-11 14:10:24,094 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-10-11 14:10:24,095 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-10-11 14:10:24,095 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-10-11 14:10:24,095 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-10-11 14:10:24,104 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:10:24" (1/1) ... [2024-10-11 14:10:24,105 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:10:24" (1/1) ... [2024-10-11 14:10:24,110 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:10:24" (1/1) ... [2024-10-11 14:10:24,130 INFO L175 MemorySlicer]: Split 2 memory accesses to 1 slices as follows [2]. 100 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2]. The 0 writes are split as follows [0]. [2024-10-11 14:10:24,131 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:10:24" (1/1) ... [2024-10-11 14:10:24,131 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:10:24" (1/1) ... [2024-10-11 14:10:24,135 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:10:24" (1/1) ... [2024-10-11 14:10:24,137 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:10:24" (1/1) ... [2024-10-11 14:10:24,142 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:10:24" (1/1) ... [2024-10-11 14:10:24,143 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:10:24" (1/1) ... [2024-10-11 14:10:24,146 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-10-11 14:10:24,151 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-10-11 14:10:24,151 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-10-11 14:10:24,151 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-10-11 14:10:24,152 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:10:24" (1/1) ... [2024-10-11 14:10:24,159 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-11 14:10:24,169 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 14:10:24,193 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-10-11 14:10:24,198 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-10-11 14:10:24,243 INFO L130 BoogieDeclarations]: Found specification of procedure thr2 [2024-10-11 14:10:24,243 INFO L138 BoogieDeclarations]: Found implementation of procedure thr2 [2024-10-11 14:10:24,244 INFO L130 BoogieDeclarations]: Found specification of procedure thr1 [2024-10-11 14:10:24,244 INFO L138 BoogieDeclarations]: Found implementation of procedure thr1 [2024-10-11 14:10:24,244 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-10-11 14:10:24,245 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-10-11 14:10:24,246 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-10-11 14:10:24,246 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-10-11 14:10:24,246 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-10-11 14:10:24,246 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-10-11 14:10:24,248 WARN L207 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2024-10-11 14:10:24,367 INFO L238 CfgBuilder]: Building ICFG [2024-10-11 14:10:24,369 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-10-11 14:10:24,480 INFO L283 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-10-11 14:10:24,480 INFO L287 CfgBuilder]: Performing block encoding [2024-10-11 14:10:24,538 INFO L309 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-10-11 14:10:24,538 INFO L314 CfgBuilder]: Removed 2 assume(true) statements. [2024-10-11 14:10:24,541 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.10 02:10:24 BoogieIcfgContainer [2024-10-11 14:10:24,541 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-10-11 14:10:24,543 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-10-11 14:10:24,543 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-10-11 14:10:24,547 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-10-11 14:10:24,547 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 11.10 02:10:23" (1/3) ... [2024-10-11 14:10:24,549 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4da69d15 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.10 02:10:24, skipping insertion in model container [2024-10-11 14:10:24,549 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:10:24" (2/3) ... [2024-10-11 14:10:24,549 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4da69d15 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.10 02:10:24, skipping insertion in model container [2024-10-11 14:10:24,549 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.10 02:10:24" (3/3) ... [2024-10-11 14:10:24,551 INFO L112 eAbstractionObserver]: Analyzing ICFG peterson.i [2024-10-11 14:10:24,565 INFO L209 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-10-11 14:10:24,565 INFO L149 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2024-10-11 14:10:24,565 INFO L484 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-10-11 14:10:24,627 INFO L143 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2024-10-11 14:10:24,662 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 43 places, 40 transitions, 94 flow [2024-10-11 14:10:24,690 INFO L124 PetriNetUnfolderBase]: 4/38 cut-off events. [2024-10-11 14:10:24,690 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-10-11 14:10:24,695 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47 conditions, 38 events. 4/38 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 59 event pairs, 0 based on Foata normal form. 0/32 useless extension candidates. Maximal degree in co-relation 35. Up to 2 conditions per place. [2024-10-11 14:10:24,696 INFO L82 GeneralOperation]: Start removeDead. Operand has 43 places, 40 transitions, 94 flow [2024-10-11 14:10:24,700 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 39 places, 36 transitions, 81 flow [2024-10-11 14:10:24,714 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-10-11 14:10:24,741 INFO L333 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopHeads, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@29231195, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-10-11 14:10:24,742 INFO L334 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2024-10-11 14:10:24,757 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-10-11 14:10:24,757 INFO L124 PetriNetUnfolderBase]: 2/24 cut-off events. [2024-10-11 14:10:24,757 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-10-11 14:10:24,758 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 14:10:24,758 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 14:10:24,759 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr2Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 3 more)] === [2024-10-11 14:10:24,769 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 14:10:24,769 INFO L85 PathProgramCache]: Analyzing trace with hash -1211308210, now seen corresponding path program 1 times [2024-10-11 14:10:24,791 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 14:10:24,792 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [755312810] [2024-10-11 14:10:24,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 14:10:24,793 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 14:10:24,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 14:10:25,051 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 14:10:25,052 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 14:10:25,052 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [755312810] [2024-10-11 14:10:25,053 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [755312810] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-11 14:10:25,053 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-11 14:10:25,053 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-10-11 14:10:25,054 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1252223797] [2024-10-11 14:10:25,055 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-11 14:10:25,062 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-11 14:10:25,068 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 14:10:25,090 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-11 14:10:25,091 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-11 14:10:25,108 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 24 out of 40 [2024-10-11 14:10:25,110 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 39 places, 36 transitions, 81 flow. Second operand has 3 states, 3 states have (on average 25.333333333333332) internal successors, (76), 3 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 14:10:25,110 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 14:10:25,110 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 24 of 40 [2024-10-11 14:10:25,112 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 14:10:25,196 INFO L124 PetriNetUnfolderBase]: 46/165 cut-off events. [2024-10-11 14:10:25,196 INFO L125 PetriNetUnfolderBase]: For 13/13 co-relation queries the response was YES. [2024-10-11 14:10:25,197 INFO L83 FinitePrefix]: Finished finitePrefix Result has 282 conditions, 165 events. 46/165 cut-off events. For 13/13 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 784 event pairs, 16 based on Foata normal form. 35/188 useless extension candidates. Maximal degree in co-relation 240. Up to 53 conditions per place. [2024-10-11 14:10:25,201 INFO L140 encePairwiseOnDemand]: 33/40 looper letters, 13 selfloop transitions, 3 changer transitions 1/39 dead transitions. [2024-10-11 14:10:25,202 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 41 places, 39 transitions, 124 flow [2024-10-11 14:10:25,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-11 14:10:25,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-10-11 14:10:25,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 94 transitions. [2024-10-11 14:10:25,214 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.7833333333333333 [2024-10-11 14:10:25,216 INFO L175 Difference]: Start difference. First operand has 39 places, 36 transitions, 81 flow. Second operand 3 states and 94 transitions. [2024-10-11 14:10:25,217 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 41 places, 39 transitions, 124 flow [2024-10-11 14:10:25,219 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 38 places, 39 transitions, 117 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-10-11 14:10:25,223 INFO L231 Difference]: Finished difference. Result has 40 places, 35 transitions, 92 flow [2024-10-11 14:10:25,225 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=72, PETRI_DIFFERENCE_MINUEND_PLACES=36, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=92, PETRI_PLACES=40, PETRI_TRANSITIONS=35} [2024-10-11 14:10:25,230 INFO L277 CegarLoopForPetriNet]: 39 programPoint places, 1 predicate places. [2024-10-11 14:10:25,230 INFO L471 AbstractCegarLoop]: Abstraction has has 40 places, 35 transitions, 92 flow [2024-10-11 14:10:25,231 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 25.333333333333332) internal successors, (76), 3 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 14:10:25,231 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 14:10:25,231 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 14:10:25,231 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-10-11 14:10:25,231 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting thr2Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr2Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 3 more)] === [2024-10-11 14:10:25,232 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 14:10:25,233 INFO L85 PathProgramCache]: Analyzing trace with hash 1878596111, now seen corresponding path program 1 times [2024-10-11 14:10:25,233 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 14:10:25,233 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [979750464] [2024-10-11 14:10:25,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 14:10:25,234 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 14:10:25,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 14:10:25,334 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 14:10:25,334 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 14:10:25,334 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [979750464] [2024-10-11 14:10:25,334 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [979750464] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-11 14:10:25,334 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-11 14:10:25,335 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-10-11 14:10:25,335 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [676605277] [2024-10-11 14:10:25,335 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-11 14:10:25,336 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-11 14:10:25,336 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 14:10:25,337 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-11 14:10:25,337 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-11 14:10:25,348 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 24 out of 40 [2024-10-11 14:10:25,348 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 40 places, 35 transitions, 92 flow. Second operand has 3 states, 3 states have (on average 26.0) internal successors, (78), 3 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 14:10:25,348 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 14:10:25,349 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 24 of 40 [2024-10-11 14:10:25,349 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 14:10:25,415 INFO L124 PetriNetUnfolderBase]: 52/180 cut-off events. [2024-10-11 14:10:25,416 INFO L125 PetriNetUnfolderBase]: For 46/46 co-relation queries the response was YES. [2024-10-11 14:10:25,417 INFO L83 FinitePrefix]: Finished finitePrefix Result has 355 conditions, 180 events. 52/180 cut-off events. For 46/46 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 831 event pairs, 28 based on Foata normal form. 13/183 useless extension candidates. Maximal degree in co-relation 175. Up to 80 conditions per place. [2024-10-11 14:10:25,418 INFO L140 encePairwiseOnDemand]: 36/40 looper letters, 12 selfloop transitions, 2 changer transitions 3/39 dead transitions. [2024-10-11 14:10:25,418 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 42 places, 39 transitions, 135 flow [2024-10-11 14:10:25,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-11 14:10:25,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-10-11 14:10:25,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 91 transitions. [2024-10-11 14:10:25,420 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.7583333333333333 [2024-10-11 14:10:25,420 INFO L175 Difference]: Start difference. First operand has 40 places, 35 transitions, 92 flow. Second operand 3 states and 91 transitions. [2024-10-11 14:10:25,420 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 42 places, 39 transitions, 135 flow [2024-10-11 14:10:25,422 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 39 transitions, 129 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-10-11 14:10:25,423 INFO L231 Difference]: Finished difference. Result has 41 places, 35 transitions, 96 flow [2024-10-11 14:10:25,425 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=86, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=96, PETRI_PLACES=41, PETRI_TRANSITIONS=35} [2024-10-11 14:10:25,426 INFO L277 CegarLoopForPetriNet]: 39 programPoint places, 2 predicate places. [2024-10-11 14:10:25,426 INFO L471 AbstractCegarLoop]: Abstraction has has 41 places, 35 transitions, 96 flow [2024-10-11 14:10:25,426 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 26.0) internal successors, (78), 3 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 14:10:25,427 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 14:10:25,427 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 14:10:25,427 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-10-11 14:10:25,427 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr2Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 3 more)] === [2024-10-11 14:10:25,428 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 14:10:25,429 INFO L85 PathProgramCache]: Analyzing trace with hash -1318664813, now seen corresponding path program 1 times [2024-10-11 14:10:25,430 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 14:10:25,430 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [969855930] [2024-10-11 14:10:25,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 14:10:25,430 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 14:10:25,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 14:10:25,598 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 14:10:25,599 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 14:10:25,599 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [969855930] [2024-10-11 14:10:25,599 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [969855930] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-11 14:10:25,600 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-11 14:10:25,600 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-10-11 14:10:25,600 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1991060971] [2024-10-11 14:10:25,600 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-11 14:10:25,600 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-10-11 14:10:25,601 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 14:10:25,601 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-10-11 14:10:25,602 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-10-11 14:10:25,638 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 40 [2024-10-11 14:10:25,639 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 35 transitions, 96 flow. Second operand has 6 states, 6 states have (on average 18.833333333333332) internal successors, (113), 6 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 14:10:25,639 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 14:10:25,639 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 40 [2024-10-11 14:10:25,639 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 14:10:25,917 INFO L124 PetriNetUnfolderBase]: 273/614 cut-off events. [2024-10-11 14:10:25,918 INFO L125 PetriNetUnfolderBase]: For 231/231 co-relation queries the response was YES. [2024-10-11 14:10:25,924 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1212 conditions, 614 events. 273/614 cut-off events. For 231/231 co-relation queries the response was YES. Maximal size of possible extension queue 44. Compared 3292 event pairs, 53 based on Foata normal form. 22/627 useless extension candidates. Maximal degree in co-relation 1107. Up to 156 conditions per place. [2024-10-11 14:10:25,926 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 36 selfloop transitions, 13 changer transitions 21/85 dead transitions. [2024-10-11 14:10:25,926 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 85 transitions, 354 flow [2024-10-11 14:10:25,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-10-11 14:10:25,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-10-11 14:10:25,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 243 transitions. [2024-10-11 14:10:25,930 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6075 [2024-10-11 14:10:25,930 INFO L175 Difference]: Start difference. First operand has 41 places, 35 transitions, 96 flow. Second operand 10 states and 243 transitions. [2024-10-11 14:10:25,930 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 85 transitions, 354 flow [2024-10-11 14:10:25,935 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 85 transitions, 351 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-10-11 14:10:25,936 INFO L231 Difference]: Finished difference. Result has 58 places, 47 transitions, 202 flow [2024-10-11 14:10:25,936 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=94, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=202, PETRI_PLACES=58, PETRI_TRANSITIONS=47} [2024-10-11 14:10:25,939 INFO L277 CegarLoopForPetriNet]: 39 programPoint places, 19 predicate places. [2024-10-11 14:10:25,939 INFO L471 AbstractCegarLoop]: Abstraction has has 58 places, 47 transitions, 202 flow [2024-10-11 14:10:25,939 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 18.833333333333332) internal successors, (113), 6 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 14:10:25,939 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 14:10:25,939 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 14:10:25,940 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-10-11 14:10:25,940 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr2Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 3 more)] === [2024-10-11 14:10:25,940 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 14:10:25,940 INFO L85 PathProgramCache]: Analyzing trace with hash 1142165899, now seen corresponding path program 2 times [2024-10-11 14:10:25,941 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 14:10:25,941 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1794754266] [2024-10-11 14:10:25,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 14:10:25,941 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 14:10:25,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 14:10:26,048 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 14:10:26,050 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 14:10:26,050 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1794754266] [2024-10-11 14:10:26,051 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1794754266] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-11 14:10:26,051 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-11 14:10:26,051 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-10-11 14:10:26,051 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1886025152] [2024-10-11 14:10:26,051 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-11 14:10:26,052 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-10-11 14:10:26,054 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 14:10:26,055 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-10-11 14:10:26,055 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-10-11 14:10:26,086 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 40 [2024-10-11 14:10:26,086 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 47 transitions, 202 flow. Second operand has 6 states, 6 states have (on average 18.833333333333332) internal successors, (113), 6 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 14:10:26,087 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 14:10:26,088 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 40 [2024-10-11 14:10:26,088 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 14:10:26,322 INFO L124 PetriNetUnfolderBase]: 256/592 cut-off events. [2024-10-11 14:10:26,322 INFO L125 PetriNetUnfolderBase]: For 593/605 co-relation queries the response was YES. [2024-10-11 14:10:26,325 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1570 conditions, 592 events. 256/592 cut-off events. For 593/605 co-relation queries the response was YES. Maximal size of possible extension queue 43. Compared 3107 event pairs, 57 based on Foata normal form. 26/615 useless extension candidates. Maximal degree in co-relation 879. Up to 150 conditions per place. [2024-10-11 14:10:26,326 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 0 selfloop transitions, 0 changer transitions 87/87 dead transitions. [2024-10-11 14:10:26,326 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 87 transitions, 475 flow [2024-10-11 14:10:26,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-10-11 14:10:26,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-10-11 14:10:26,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 236 transitions. [2024-10-11 14:10:26,328 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.59 [2024-10-11 14:10:26,328 INFO L175 Difference]: Start difference. First operand has 58 places, 47 transitions, 202 flow. Second operand 10 states and 236 transitions. [2024-10-11 14:10:26,329 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 87 transitions, 475 flow [2024-10-11 14:10:26,336 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 87 transitions, 449 flow, removed 13 selfloop flow, removed 2 redundant places. [2024-10-11 14:10:26,336 INFO L231 Difference]: Finished difference. Result has 59 places, 0 transitions, 0 flow [2024-10-11 14:10:26,337 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=176, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=0, PETRI_PLACES=59, PETRI_TRANSITIONS=0} [2024-10-11 14:10:26,337 INFO L277 CegarLoopForPetriNet]: 39 programPoint places, 20 predicate places. [2024-10-11 14:10:26,337 INFO L471 AbstractCegarLoop]: Abstraction has has 59 places, 0 transitions, 0 flow [2024-10-11 14:10:26,338 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 18.833333333333332) internal successors, (113), 6 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 14:10:26,342 INFO L782 garLoopResultBuilder]: Registering result SAFE for location thr2Err0ASSERT_VIOLATIONERROR_FUNCTION (5 of 6 remaining) [2024-10-11 14:10:26,343 INFO L782 garLoopResultBuilder]: Registering result SAFE for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (4 of 6 remaining) [2024-10-11 14:10:26,343 INFO L782 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (3 of 6 remaining) [2024-10-11 14:10:26,343 INFO L782 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 6 remaining) [2024-10-11 14:10:26,343 INFO L782 garLoopResultBuilder]: Registering result SAFE for location thr2Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 6 remaining) [2024-10-11 14:10:26,343 INFO L782 garLoopResultBuilder]: Registering result SAFE for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 6 remaining) [2024-10-11 14:10:26,344 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-10-11 14:10:26,344 INFO L407 BasicCegarLoop]: Path program histogram: [2, 1, 1] [2024-10-11 14:10:26,350 INFO L234 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2024-10-11 14:10:26,351 INFO L165 ceAbstractionStarter]: Computing trace abstraction results [2024-10-11 14:10:26,357 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 11.10 02:10:26 BasicIcfg [2024-10-11 14:10:26,358 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2024-10-11 14:10:26,358 INFO L112 PluginConnector]: ------------------------Witness Printer---------------------------- [2024-10-11 14:10:26,361 INFO L270 PluginConnector]: Initializing Witness Printer... [2024-10-11 14:10:26,361 INFO L274 PluginConnector]: Witness Printer initialized [2024-10-11 14:10:26,362 INFO L184 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.10 02:10:24" (3/4) ... [2024-10-11 14:10:26,363 INFO L139 WitnessPrinter]: Generating witness for correct program [2024-10-11 14:10:26,366 INFO L361 RCFGBacktranslator]: Ignoring RootEdge to procedure thr2 [2024-10-11 14:10:26,366 INFO L361 RCFGBacktranslator]: Ignoring RootEdge to procedure thr1 [2024-10-11 14:10:26,369 INFO L904 BoogieBacktranslator]: Reduced CFG by removing 28 nodes and edges [2024-10-11 14:10:26,369 INFO L904 BoogieBacktranslator]: Reduced CFG by removing 11 nodes and edges [2024-10-11 14:10:26,369 INFO L904 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges [2024-10-11 14:10:26,370 INFO L904 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2024-10-11 14:10:26,447 INFO L149 WitnessManager]: Wrote witness to /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/witness.graphml [2024-10-11 14:10:26,448 INFO L149 WitnessManager]: Wrote witness to /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/witness.yml [2024-10-11 14:10:26,448 INFO L131 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2024-10-11 14:10:26,448 INFO L158 Benchmark]: Toolchain (without parser) took 2894.55ms. Allocated memory was 153.1MB in the beginning and 199.2MB in the end (delta: 46.1MB). Free memory was 95.1MB in the beginning and 114.0MB in the end (delta: -18.8MB). Peak memory consumption was 27.9MB. Max. memory is 16.1GB. [2024-10-11 14:10:26,449 INFO L158 Benchmark]: CDTParser took 0.13ms. Allocated memory is still 153.1MB. Free memory is still 117.2MB. There was no memory consumed. Max. memory is 16.1GB. [2024-10-11 14:10:26,449 INFO L158 Benchmark]: CACSL2BoogieTranslator took 492.62ms. Allocated memory is still 153.1MB. Free memory was 94.5MB in the beginning and 72.9MB in the end (delta: 21.6MB). Peak memory consumption was 21.0MB. Max. memory is 16.1GB. [2024-10-11 14:10:26,449 INFO L158 Benchmark]: Boogie Procedure Inliner took 45.83ms. Allocated memory is still 153.1MB. Free memory was 72.9MB in the beginning and 70.9MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2024-10-11 14:10:26,449 INFO L158 Benchmark]: Boogie Preprocessor took 55.32ms. Allocated memory is still 153.1MB. Free memory was 70.9MB in the beginning and 68.8MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2024-10-11 14:10:26,450 INFO L158 Benchmark]: RCFGBuilder took 390.32ms. Allocated memory is still 153.1MB. Free memory was 68.8MB in the beginning and 52.0MB in the end (delta: 16.8MB). Peak memory consumption was 16.8MB. Max. memory is 16.1GB. [2024-10-11 14:10:26,450 INFO L158 Benchmark]: TraceAbstraction took 1814.94ms. Allocated memory was 153.1MB in the beginning and 199.2MB in the end (delta: 46.1MB). Free memory was 51.7MB in the beginning and 118.2MB in the end (delta: -66.5MB). There was no memory consumed. Max. memory is 16.1GB. [2024-10-11 14:10:26,450 INFO L158 Benchmark]: Witness Printer took 89.35ms. Allocated memory is still 199.2MB. Free memory was 118.2MB in the beginning and 114.0MB in the end (delta: 4.2MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. [2024-10-11 14:10:26,452 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.13ms. Allocated memory is still 153.1MB. Free memory is still 117.2MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 492.62ms. Allocated memory is still 153.1MB. Free memory was 94.5MB in the beginning and 72.9MB in the end (delta: 21.6MB). Peak memory consumption was 21.0MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 45.83ms. Allocated memory is still 153.1MB. Free memory was 72.9MB in the beginning and 70.9MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 55.32ms. Allocated memory is still 153.1MB. Free memory was 70.9MB in the beginning and 68.8MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 390.32ms. Allocated memory is still 153.1MB. Free memory was 68.8MB in the beginning and 52.0MB in the end (delta: 16.8MB). Peak memory consumption was 16.8MB. Max. memory is 16.1GB. * TraceAbstraction took 1814.94ms. Allocated memory was 153.1MB in the beginning and 199.2MB in the end (delta: 46.1MB). Free memory was 51.7MB in the beginning and 118.2MB in the end (delta: -66.5MB). There was no memory consumed. Max. memory is 16.1GB. * Witness Printer took 89.35ms. Allocated memory is still 199.2MB. Free memory was 118.2MB in the beginning and 114.0MB in the end (delta: 4.2MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 753]: a call to reach_error is unreachable For all program executions holds that a call to reach_error is unreachable at this location - PositiveResult [Line: 725]: a call to reach_error is unreachable For all program executions holds that a call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 5 procedures, 67 locations, 6 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 0.0s, RemoveRedundantFlowTime: 0.0s, RemoveRedundantFlowUnfoldingTime: 0.0s, BackfoldingTime: 0.0s, BackfoldingUnfoldingTime: 0.0s, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 1.7s, OverallIterations: 4, TraceHistogramMax: 1, PathProgramHistogramMax: 2, EmptinessCheckTime: 0.0s, AutomataDifference: 0.9s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 134 SdHoareTripleChecker+Valid, 0.4s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 109 mSDsluCounter, 75 SdHoareTripleChecker+Invalid, 0.3s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 50 mSDsCounter, 16 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 374 IncrementalHoareTripleChecker+Invalid, 390 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 16 mSolverCounterUnsat, 25 mSDtfsCounter, 374 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 26 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=202occurred in iteration=3, InterpolantAutomatonStates: 26, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.4s InterpolantComputationTime, 58 NumberOfCodeBlocks, 58 NumberOfCodeBlocksAsserted, 4 NumberOfCheckSat, 54 ConstructedInterpolants, 0 QuantifiedInterpolants, 124 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 4 InterpolantComputations, 4 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 2 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2024-10-11 14:10:26,482 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Result: TRUE