./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-ext/35_double_lock_p3_vs.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 4a390ef5 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 /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/pthread-ext/35_double_lock_p3_vs.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 22ba795826618dfa50b90a88d5a4c30adee7dfead438325f939eb97a379da897 --- Real Ultimate output --- This is Ultimate 0.2.5-dev-4a390ef-m [2024-10-24 12:11:37,503 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-10-24 12:11:37,574 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-10-24 12:11:37,581 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-10-24 12:11:37,583 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-10-24 12:11:37,615 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-10-24 12:11:37,617 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-10-24 12:11:37,617 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-10-24 12:11:37,618 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-10-24 12:11:37,619 INFO L153 SettingsManager]: * Use memory slicer=true [2024-10-24 12:11:37,620 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-10-24 12:11:37,620 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-10-24 12:11:37,621 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-10-24 12:11:37,622 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-10-24 12:11:37,622 INFO L153 SettingsManager]: * Use SBE=true [2024-10-24 12:11:37,623 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-10-24 12:11:37,624 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-10-24 12:11:37,625 INFO L153 SettingsManager]: * sizeof long=4 [2024-10-24 12:11:37,625 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-10-24 12:11:37,626 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-10-24 12:11:37,626 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-10-24 12:11:37,627 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-10-24 12:11:37,627 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-10-24 12:11:37,627 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-10-24 12:11:37,628 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-10-24 12:11:37,628 INFO L153 SettingsManager]: * sizeof long double=12 [2024-10-24 12:11:37,628 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-10-24 12:11:37,629 INFO L153 SettingsManager]: * Use constant arrays=true [2024-10-24 12:11:37,629 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-10-24 12:11:37,629 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-10-24 12:11:37,630 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-10-24 12:11:37,630 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-10-24 12:11:37,630 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-24 12:11:37,631 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-10-24 12:11:37,631 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-10-24 12:11:37,631 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-10-24 12:11:37,632 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-10-24 12:11:37,632 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-10-24 12:11:37,632 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-10-24 12:11:37,633 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-10-24 12:11:37,633 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-10-24 12:11:37,634 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-10-24 12:11:37,634 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 22ba795826618dfa50b90a88d5a4c30adee7dfead438325f939eb97a379da897 [2024-10-24 12:11:37,947 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-10-24 12:11:37,980 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-10-24 12:11:37,986 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-10-24 12:11:37,987 INFO L270 PluginConnector]: Initializing CDTParser... [2024-10-24 12:11:37,988 INFO L274 PluginConnector]: CDTParser initialized [2024-10-24 12:11:37,989 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/pthread-ext/35_double_lock_p3_vs.i [2024-10-24 12:11:39,763 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-10-24 12:11:40,042 INFO L384 CDTParser]: Found 1 translation units. [2024-10-24 12:11:40,043 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/pthread-ext/35_double_lock_p3_vs.i [2024-10-24 12:11:40,061 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/43858c606/eaee880ef6ed4421999bef1bf1ba95e9/FLAG940ecc1ea [2024-10-24 12:11:40,077 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/43858c606/eaee880ef6ed4421999bef1bf1ba95e9 [2024-10-24 12:11:40,080 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-10-24 12:11:40,081 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-10-24 12:11:40,082 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-10-24 12:11:40,083 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-10-24 12:11:40,088 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-10-24 12:11:40,089 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.10 12:11:40" (1/1) ... [2024-10-24 12:11:40,093 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6400c597 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 12:11:40, skipping insertion in model container [2024-10-24 12:11:40,093 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.10 12:11:40" (1/1) ... [2024-10-24 12:11:40,141 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-10-24 12:11:40,497 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-ext/35_double_lock_p3_vs.i[30703,30716] [2024-10-24 12:11:40,509 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-24 12:11:40,525 INFO L200 MainTranslator]: Completed pre-run [2024-10-24 12:11:40,587 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-ext/35_double_lock_p3_vs.i[30703,30716] [2024-10-24 12:11:40,594 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-24 12:11:40,707 INFO L204 MainTranslator]: Completed translation [2024-10-24 12:11:40,708 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 12:11:40 WrapperNode [2024-10-24 12:11:40,708 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-10-24 12:11:40,710 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-10-24 12:11:40,710 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-10-24 12:11:40,711 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-10-24 12:11:40,718 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 12:11:40" (1/1) ... [2024-10-24 12:11:40,733 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 12:11:40" (1/1) ... [2024-10-24 12:11:40,766 INFO L138 Inliner]: procedures = 164, calls = 21, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 67 [2024-10-24 12:11:40,768 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-10-24 12:11:40,769 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-10-24 12:11:40,769 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-10-24 12:11:40,769 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-10-24 12:11:40,780 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 12:11:40" (1/1) ... [2024-10-24 12:11:40,781 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 12:11:40" (1/1) ... [2024-10-24 12:11:40,784 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 12:11:40" (1/1) ... [2024-10-24 12:11:40,802 INFO L175 MemorySlicer]: Split 7 memory accesses to 2 slices as follows [2, 5]. 71 percent of accesses are in the largest equivalence class. The 7 initializations are split as follows [2, 5]. The 0 writes are split as follows [0, 0]. [2024-10-24 12:11:40,802 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 12:11:40" (1/1) ... [2024-10-24 12:11:40,803 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 12:11:40" (1/1) ... [2024-10-24 12:11:40,806 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 12:11:40" (1/1) ... [2024-10-24 12:11:40,810 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 12:11:40" (1/1) ... [2024-10-24 12:11:40,811 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 12:11:40" (1/1) ... [2024-10-24 12:11:40,813 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 12:11:40" (1/1) ... [2024-10-24 12:11:40,815 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-10-24 12:11:40,816 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-10-24 12:11:40,816 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-10-24 12:11:40,816 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-10-24 12:11:40,817 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 12:11:40" (1/1) ... [2024-10-24 12:11:40,826 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-24 12:11:40,838 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-24 12:11:40,858 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) [2024-10-24 12:11:40,860 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 [2024-10-24 12:11:40,908 INFO L130 BoogieDeclarations]: Found specification of procedure thr2 [2024-10-24 12:11:40,908 INFO L138 BoogieDeclarations]: Found implementation of procedure thr2 [2024-10-24 12:11:40,908 INFO L130 BoogieDeclarations]: Found specification of procedure thr1 [2024-10-24 12:11:40,909 INFO L138 BoogieDeclarations]: Found implementation of procedure thr1 [2024-10-24 12:11:40,909 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2024-10-24 12:11:40,909 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-10-24 12:11:40,909 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-10-24 12:11:40,909 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-10-24 12:11:40,909 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexUnlock [2024-10-24 12:11:40,909 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-10-24 12:11:40,910 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-10-24 12:11:40,911 WARN L207 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2024-10-24 12:11:41,089 INFO L238 CfgBuilder]: Building ICFG [2024-10-24 12:11:41,092 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-10-24 12:11:41,255 INFO L283 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-10-24 12:11:41,256 INFO L287 CfgBuilder]: Performing block encoding [2024-10-24 12:11:41,380 INFO L309 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-10-24 12:11:41,381 INFO L314 CfgBuilder]: Removed 2 assume(true) statements. [2024-10-24 12:11:41,381 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.10 12:11:41 BoogieIcfgContainer [2024-10-24 12:11:41,386 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-10-24 12:11:41,388 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-10-24 12:11:41,388 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-10-24 12:11:41,393 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-10-24 12:11:41,394 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.10 12:11:40" (1/3) ... [2024-10-24 12:11:41,394 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@965e25e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.10 12:11:41, skipping insertion in model container [2024-10-24 12:11:41,396 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 12:11:40" (2/3) ... [2024-10-24 12:11:41,396 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@965e25e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.10 12:11:41, skipping insertion in model container [2024-10-24 12:11:41,396 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.10 12:11:41" (3/3) ... [2024-10-24 12:11:41,398 INFO L112 eAbstractionObserver]: Analyzing ICFG 35_double_lock_p3_vs.i [2024-10-24 12:11:41,416 INFO L209 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-10-24 12:11:41,416 INFO L149 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-10-24 12:11:41,417 INFO L484 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-10-24 12:11:41,463 INFO L143 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-10-24 12:11:41,506 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 35 places, 32 transitions, 72 flow [2024-10-24 12:11:41,534 INFO L124 PetriNetUnfolderBase]: 3/33 cut-off events. [2024-10-24 12:11:41,534 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-10-24 12:11:41,540 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40 conditions, 33 events. 3/33 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 67 event pairs, 0 based on Foata normal form. 0/27 useless extension candidates. Maximal degree in co-relation 33. Up to 2 conditions per place. [2024-10-24 12:11:41,540 INFO L82 GeneralOperation]: Start removeDead. Operand has 35 places, 32 transitions, 72 flow [2024-10-24 12:11:41,544 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 34 places, 31 transitions, 69 flow [2024-10-24 12:11:41,561 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-10-24 12:11:41,571 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;@3204aa51, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-10-24 12:11:41,573 INFO L334 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2024-10-24 12:11:41,584 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-10-24 12:11:41,584 INFO L124 PetriNetUnfolderBase]: 1/22 cut-off events. [2024-10-24 12:11:41,584 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-10-24 12:11:41,584 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-24 12:11:41,587 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1] [2024-10-24 12:11:41,588 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-10-24 12:11:41,595 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 12:11:41,595 INFO L85 PathProgramCache]: Analyzing trace with hash 1240349652, now seen corresponding path program 1 times [2024-10-24 12:11:41,605 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 12:11:41,606 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1854666740] [2024-10-24 12:11:41,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 12:11:41,606 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 12:11:41,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-10-24 12:11:41,756 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2024-10-24 12:11:41,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-10-24 12:11:41,813 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2024-10-24 12:11:41,815 INFO L325 BasicCegarLoop]: Counterexample is feasible [2024-10-24 12:11:41,817 INFO L782 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (3 of 4 remaining) [2024-10-24 12:11:41,820 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 4 remaining) [2024-10-24 12:11:41,821 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 4 remaining) [2024-10-24 12:11:41,821 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 4 remaining) [2024-10-24 12:11:41,822 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-10-24 12:11:41,823 INFO L407 BasicCegarLoop]: Path program histogram: [1] [2024-10-24 12:11:41,831 WARN L239 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2024-10-24 12:11:41,831 INFO L484 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2024-10-24 12:11:41,864 INFO L143 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-10-24 12:11:41,870 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 61 places, 57 transitions, 134 flow [2024-10-24 12:11:41,894 INFO L124 PetriNetUnfolderBase]: 4/49 cut-off events. [2024-10-24 12:11:41,895 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-10-24 12:11:41,897 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61 conditions, 49 events. 4/49 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 107 event pairs, 0 based on Foata normal form. 0/41 useless extension candidates. Maximal degree in co-relation 56. Up to 3 conditions per place. [2024-10-24 12:11:41,897 INFO L82 GeneralOperation]: Start removeDead. Operand has 61 places, 57 transitions, 134 flow [2024-10-24 12:11:41,898 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 48 places, 44 transitions, 101 flow [2024-10-24 12:11:41,902 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-10-24 12:11:41,903 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;@3204aa51, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-10-24 12:11:41,903 INFO L334 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2024-10-24 12:11:41,916 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-10-24 12:11:41,916 INFO L124 PetriNetUnfolderBase]: 1/20 cut-off events. [2024-10-24 12:11:41,917 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2024-10-24 12:11:41,917 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-24 12:11:41,917 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-10-24 12:11:41,917 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2024-10-24 12:11:41,919 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 12:11:41,919 INFO L85 PathProgramCache]: Analyzing trace with hash -409590917, now seen corresponding path program 1 times [2024-10-24 12:11:41,919 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 12:11:41,919 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1533101776] [2024-10-24 12:11:41,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 12:11:41,920 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 12:11:41,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 12:11:42,082 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 12:11:42,082 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 12:11:42,083 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1533101776] [2024-10-24 12:11:42,083 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1533101776] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-24 12:11:42,083 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-24 12:11:42,083 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-10-24 12:11:42,084 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1363491589] [2024-10-24 12:11:42,086 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-24 12:11:42,094 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-24 12:11:42,100 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 12:11:42,135 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-24 12:11:42,159 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-24 12:11:42,182 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 57 [2024-10-24 12:11:42,185 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 44 transitions, 101 flow. Second operand has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 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) [2024-10-24 12:11:42,186 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-24 12:11:42,186 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 57 [2024-10-24 12:11:42,187 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-24 12:11:42,874 INFO L124 PetriNetUnfolderBase]: 2714/4054 cut-off events. [2024-10-24 12:11:42,875 INFO L125 PetriNetUnfolderBase]: For 105/105 co-relation queries the response was YES. [2024-10-24 12:11:42,902 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8077 conditions, 4054 events. 2714/4054 cut-off events. For 105/105 co-relation queries the response was YES. Maximal size of possible extension queue 240. Compared 23209 event pairs, 2506 based on Foata normal form. 797/4614 useless extension candidates. Maximal degree in co-relation 8066. Up to 3911 conditions per place. [2024-10-24 12:11:43,049 INFO L140 encePairwiseOnDemand]: 53/57 looper letters, 30 selfloop transitions, 1 changer transitions 0/39 dead transitions. [2024-10-24 12:11:43,049 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 39 transitions, 153 flow [2024-10-24 12:11:43,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-24 12:11:43,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-10-24 12:11:43,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 82 transitions. [2024-10-24 12:11:43,065 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.47953216374269003 [2024-10-24 12:11:43,067 INFO L175 Difference]: Start difference. First operand has 48 places, 44 transitions, 101 flow. Second operand 3 states and 82 transitions. [2024-10-24 12:11:43,068 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 39 transitions, 153 flow [2024-10-24 12:11:43,075 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 39 transitions, 152 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-10-24 12:11:43,078 INFO L231 Difference]: Finished difference. Result has 45 places, 39 transitions, 92 flow [2024-10-24 12:11:43,082 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=57, PETRI_DIFFERENCE_MINUEND_FLOW=90, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=92, PETRI_PLACES=45, PETRI_TRANSITIONS=39} [2024-10-24 12:11:43,091 INFO L277 CegarLoopForPetriNet]: 48 programPoint places, -3 predicate places. [2024-10-24 12:11:43,091 INFO L471 AbstractCegarLoop]: Abstraction has has 45 places, 39 transitions, 92 flow [2024-10-24 12:11:43,092 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 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) [2024-10-24 12:11:43,092 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-24 12:11:43,094 INFO L204 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1] [2024-10-24 12:11:43,094 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-10-24 12:11:43,095 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2024-10-24 12:11:43,096 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 12:11:43,096 INFO L85 PathProgramCache]: Analyzing trace with hash -443557731, now seen corresponding path program 1 times [2024-10-24 12:11:43,096 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 12:11:43,096 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [208078536] [2024-10-24 12:11:43,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 12:11:43,097 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 12:11:43,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-10-24 12:11:43,135 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2024-10-24 12:11:43,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-10-24 12:11:43,180 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2024-10-24 12:11:43,181 INFO L325 BasicCegarLoop]: Counterexample is feasible [2024-10-24 12:11:43,181 INFO L782 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (4 of 5 remaining) [2024-10-24 12:11:43,185 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (3 of 5 remaining) [2024-10-24 12:11:43,186 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 5 remaining) [2024-10-24 12:11:43,186 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 5 remaining) [2024-10-24 12:11:43,186 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 5 remaining) [2024-10-24 12:11:43,186 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-10-24 12:11:43,187 INFO L407 BasicCegarLoop]: Path program histogram: [1, 1] [2024-10-24 12:11:43,187 WARN L239 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2024-10-24 12:11:43,188 INFO L484 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2024-10-24 12:11:43,235 INFO L143 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-10-24 12:11:43,240 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 87 places, 82 transitions, 200 flow [2024-10-24 12:11:43,248 INFO L124 PetriNetUnfolderBase]: 5/65 cut-off events. [2024-10-24 12:11:43,249 INFO L125 PetriNetUnfolderBase]: For 7/7 co-relation queries the response was YES. [2024-10-24 12:11:43,251 INFO L83 FinitePrefix]: Finished finitePrefix Result has 83 conditions, 65 events. 5/65 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 173 event pairs, 0 based on Foata normal form. 0/55 useless extension candidates. Maximal degree in co-relation 76. Up to 4 conditions per place. [2024-10-24 12:11:43,251 INFO L82 GeneralOperation]: Start removeDead. Operand has 87 places, 82 transitions, 200 flow [2024-10-24 12:11:43,254 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 62 places, 57 transitions, 135 flow [2024-10-24 12:11:43,256 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-10-24 12:11:43,258 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;@3204aa51, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-10-24 12:11:43,259 INFO L334 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2024-10-24 12:11:43,262 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-10-24 12:11:43,263 INFO L124 PetriNetUnfolderBase]: 1/20 cut-off events. [2024-10-24 12:11:43,263 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2024-10-24 12:11:43,263 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-24 12:11:43,264 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-10-24 12:11:43,264 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 3 more)] === [2024-10-24 12:11:43,265 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 12:11:43,265 INFO L85 PathProgramCache]: Analyzing trace with hash -835658957, now seen corresponding path program 1 times [2024-10-24 12:11:43,266 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 12:11:43,266 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [325719832] [2024-10-24 12:11:43,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 12:11:43,266 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 12:11:43,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 12:11:43,357 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 12:11:43,358 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 12:11:43,358 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [325719832] [2024-10-24 12:11:43,358 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [325719832] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-24 12:11:43,358 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-24 12:11:43,358 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-10-24 12:11:43,358 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1115827939] [2024-10-24 12:11:43,359 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-24 12:11:43,359 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-24 12:11:43,360 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 12:11:43,360 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-24 12:11:43,360 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-24 12:11:43,376 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 23 out of 82 [2024-10-24 12:11:43,377 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 57 transitions, 135 flow. Second operand has 3 states, 3 states have (on average 24.333333333333332) internal successors, (73), 3 states have internal predecessors, (73), 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) [2024-10-24 12:11:43,377 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-24 12:11:43,377 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 23 of 82 [2024-10-24 12:11:43,377 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-24 12:11:49,065 INFO L124 PetriNetUnfolderBase]: 43007/57637 cut-off events. [2024-10-24 12:11:49,065 INFO L125 PetriNetUnfolderBase]: For 2553/2553 co-relation queries the response was YES. [2024-10-24 12:11:49,266 INFO L83 FinitePrefix]: Finished finitePrefix Result has 115385 conditions, 57637 events. 43007/57637 cut-off events. For 2553/2553 co-relation queries the response was YES. Maximal size of possible extension queue 2287. Compared 366393 event pairs, 39532 based on Foata normal form. 8782/62605 useless extension candidates. Maximal degree in co-relation 115373. Up to 56183 conditions per place. [2024-10-24 12:11:49,597 INFO L140 encePairwiseOnDemand]: 78/82 looper letters, 42 selfloop transitions, 1 changer transitions 0/52 dead transitions. [2024-10-24 12:11:49,598 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 52 transitions, 211 flow [2024-10-24 12:11:49,599 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-24 12:11:49,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-10-24 12:11:49,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 115 transitions. [2024-10-24 12:11:49,600 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.46747967479674796 [2024-10-24 12:11:49,600 INFO L175 Difference]: Start difference. First operand has 62 places, 57 transitions, 135 flow. Second operand 3 states and 115 transitions. [2024-10-24 12:11:49,601 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 52 transitions, 211 flow [2024-10-24 12:11:49,608 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 52 transitions, 208 flow, removed 1 selfloop flow, removed 1 redundant places. [2024-10-24 12:11:49,609 INFO L231 Difference]: Finished difference. Result has 59 places, 52 transitions, 124 flow [2024-10-24 12:11:49,610 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=82, PETRI_DIFFERENCE_MINUEND_FLOW=122, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=52, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=124, PETRI_PLACES=59, PETRI_TRANSITIONS=52} [2024-10-24 12:11:49,611 INFO L277 CegarLoopForPetriNet]: 62 programPoint places, -3 predicate places. [2024-10-24 12:11:49,611 INFO L471 AbstractCegarLoop]: Abstraction has has 59 places, 52 transitions, 124 flow [2024-10-24 12:11:49,614 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 24.333333333333332) internal successors, (73), 3 states have internal predecessors, (73), 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) [2024-10-24 12:11:49,614 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-24 12:11:49,615 INFO L204 CegarLoopForPetriNet]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2024-10-24 12:11:49,615 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-10-24 12:11:49,615 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 3 more)] === [2024-10-24 12:11:49,616 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 12:11:49,616 INFO L85 PathProgramCache]: Analyzing trace with hash -616763677, now seen corresponding path program 1 times [2024-10-24 12:11:49,616 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 12:11:49,616 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2122982559] [2024-10-24 12:11:49,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 12:11:49,617 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 12:11:49,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-10-24 12:11:49,646 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2024-10-24 12:11:49,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-10-24 12:11:49,680 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2024-10-24 12:11:49,684 INFO L325 BasicCegarLoop]: Counterexample is feasible [2024-10-24 12:11:49,685 INFO L782 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (5 of 6 remaining) [2024-10-24 12:11:49,685 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (4 of 6 remaining) [2024-10-24 12:11:49,685 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (3 of 6 remaining) [2024-10-24 12:11:49,685 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 6 remaining) [2024-10-24 12:11:49,686 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 6 remaining) [2024-10-24 12:11:49,686 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 6 remaining) [2024-10-24 12:11:49,686 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-10-24 12:11:49,686 INFO L407 BasicCegarLoop]: Path program histogram: [1, 1] [2024-10-24 12:11:49,687 WARN L239 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2024-10-24 12:11:49,687 INFO L484 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2024-10-24 12:11:49,746 INFO L143 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-10-24 12:11:49,753 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 113 places, 107 transitions, 270 flow [2024-10-24 12:11:49,764 INFO L124 PetriNetUnfolderBase]: 6/81 cut-off events. [2024-10-24 12:11:49,765 INFO L125 PetriNetUnfolderBase]: For 16/16 co-relation queries the response was YES. [2024-10-24 12:11:49,767 INFO L83 FinitePrefix]: Finished finitePrefix Result has 106 conditions, 81 events. 6/81 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 230 event pairs, 0 based on Foata normal form. 0/69 useless extension candidates. Maximal degree in co-relation 97. Up to 5 conditions per place. [2024-10-24 12:11:49,767 INFO L82 GeneralOperation]: Start removeDead. Operand has 113 places, 107 transitions, 270 flow [2024-10-24 12:11:49,768 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 76 places, 70 transitions, 171 flow [2024-10-24 12:11:49,770 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-10-24 12:11:49,772 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;@3204aa51, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-10-24 12:11:49,773 INFO L334 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2024-10-24 12:11:49,775 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-10-24 12:11:49,777 INFO L124 PetriNetUnfolderBase]: 1/20 cut-off events. [2024-10-24 12:11:49,777 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2024-10-24 12:11:49,777 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-24 12:11:49,777 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-10-24 12:11:49,777 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2024-10-24 12:11:49,778 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 12:11:49,778 INFO L85 PathProgramCache]: Analyzing trace with hash 1136618379, now seen corresponding path program 1 times [2024-10-24 12:11:49,778 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 12:11:49,779 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [951088220] [2024-10-24 12:11:49,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 12:11:49,779 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 12:11:49,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 12:11:49,841 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 12:11:49,842 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 12:11:49,842 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [951088220] [2024-10-24 12:11:49,842 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [951088220] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-24 12:11:49,842 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-24 12:11:49,842 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-10-24 12:11:49,843 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1035860184] [2024-10-24 12:11:49,843 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-24 12:11:49,843 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-24 12:11:49,843 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 12:11:49,844 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-24 12:11:49,844 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-24 12:11:49,862 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 30 out of 107 [2024-10-24 12:11:49,864 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 70 transitions, 171 flow. Second operand has 3 states, 3 states have (on average 31.333333333333332) internal successors, (94), 3 states have internal predecessors, (94), 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) [2024-10-24 12:11:49,865 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-24 12:11:49,865 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 30 of 107 [2024-10-24 12:11:49,865 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand