./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-ext/14_spin2003.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 7724a2de Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../../../trunk/examples/svcomp/pthread-ext/14_spin2003.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 f5ed9d077a05ec08544f0d3c902eb6b5aa6ad768c4ec69a1caaef2b54748a07e --- Real Ultimate output --- This is Ultimate 0.2.4-tmp.fs.goblint-validation-7724a2d-m [2024-06-27 16:19:53,727 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-27 16:19:53,783 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-27 16:19:53,786 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-27 16:19:53,786 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-27 16:19:53,811 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-27 16:19:53,812 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-27 16:19:53,812 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-27 16:19:53,813 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-27 16:19:53,817 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-27 16:19:53,817 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-27 16:19:53,817 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-27 16:19:53,818 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-27 16:19:53,819 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-27 16:19:53,820 INFO L153 SettingsManager]: * Use SBE=true [2024-06-27 16:19:53,820 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-27 16:19:53,820 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-27 16:19:53,820 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-27 16:19:53,821 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-27 16:19:53,821 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-27 16:19:53,821 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-27 16:19:53,821 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-27 16:19:53,821 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-27 16:19:53,822 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-27 16:19:53,822 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-27 16:19:53,822 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-27 16:19:53,822 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-27 16:19:53,823 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-27 16:19:53,823 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-27 16:19:53,824 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-27 16:19:53,824 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-27 16:19:53,825 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-27 16:19:53,825 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-27 16:19:53,825 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-27 16:19:53,825 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-27 16:19:53,825 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-27 16:19:53,825 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-27 16:19:53,826 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-27 16:19:53,826 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-27 16:19:53,826 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-27 16:19:53,826 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-27 16:19:53,827 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-27 16:19:53,827 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-27 16:19:53,827 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> f5ed9d077a05ec08544f0d3c902eb6b5aa6ad768c4ec69a1caaef2b54748a07e [2024-06-27 16:19:54,053 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-27 16:19:54,079 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-27 16:19:54,082 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-27 16:19:54,083 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-27 16:19:54,092 INFO L274 PluginConnector]: CDTParser initialized [2024-06-27 16:19:54,093 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-ext/14_spin2003.i [2024-06-27 16:19:55,080 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-27 16:19:55,303 INFO L384 CDTParser]: Found 1 translation units. [2024-06-27 16:19:55,305 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-ext/14_spin2003.i [2024-06-27 16:19:55,322 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c0d455d4c/c7f97b37233a443f84ea01a21f8cff77/FLAG110844050 [2024-06-27 16:19:55,332 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c0d455d4c/c7f97b37233a443f84ea01a21f8cff77 [2024-06-27 16:19:55,334 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-27 16:19:55,335 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-06-27 16:19:55,336 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-27 16:19:55,337 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-27 16:19:55,341 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-27 16:19:55,343 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.06 04:19:55" (1/1) ... [2024-06-27 16:19:55,344 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4ad23d85 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 04:19:55, skipping insertion in model container [2024-06-27 16:19:55,344 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.06 04:19:55" (1/1) ... [2024-06-27 16:19:55,370 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-27 16:19:55,573 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread-ext/14_spin2003.i[30203,30216] [2024-06-27 16:19:55,581 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-27 16:19:55,587 INFO L202 MainTranslator]: Completed pre-run [2024-06-27 16:19:55,620 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread-ext/14_spin2003.i[30203,30216] [2024-06-27 16:19:55,622 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-27 16:19:55,647 INFO L206 MainTranslator]: Completed translation [2024-06-27 16:19:55,648 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 04:19:55 WrapperNode [2024-06-27 16:19:55,648 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-27 16:19:55,649 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-27 16:19:55,649 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-27 16:19:55,649 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-27 16:19:55,654 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 04:19:55" (1/1) ... [2024-06-27 16:19:55,666 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 04:19:55" (1/1) ... [2024-06-27 16:19:55,685 INFO L138 Inliner]: procedures = 168, calls = 11, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 42 [2024-06-27 16:19:55,686 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-27 16:19:55,686 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-27 16:19:55,687 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-27 16:19:55,687 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-27 16:19:55,694 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 04:19:55" (1/1) ... [2024-06-27 16:19:55,695 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 04:19:55" (1/1) ... [2024-06-27 16:19:55,706 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 04:19:55" (1/1) ... [2024-06-27 16:19:55,730 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]. [2024-06-27 16:19:55,731 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 04:19:55" (1/1) ... [2024-06-27 16:19:55,731 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 04:19:55" (1/1) ... [2024-06-27 16:19:55,739 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 04:19:55" (1/1) ... [2024-06-27 16:19:55,743 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 04:19:55" (1/1) ... [2024-06-27 16:19:55,747 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 04:19:55" (1/1) ... [2024-06-27 16:19:55,749 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 04:19:55" (1/1) ... [2024-06-27 16:19:55,753 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-27 16:19:55,754 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-27 16:19:55,754 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-27 16:19:55,754 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-27 16:19:55,755 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 04:19:55" (1/1) ... [2024-06-27 16:19:55,759 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-27 16:19:55,782 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 16:19:55,798 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) [2024-06-27 16:19:55,801 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 [2024-06-27 16:19:55,835 INFO L130 BoogieDeclarations]: Found specification of procedure thr1 [2024-06-27 16:19:55,835 INFO L138 BoogieDeclarations]: Found implementation of procedure thr1 [2024-06-27 16:19:55,835 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-27 16:19:55,836 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-27 16:19:55,836 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-27 16:19:55,836 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-27 16:19:55,837 WARN L214 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2024-06-27 16:19:55,923 INFO L244 CfgBuilder]: Building ICFG [2024-06-27 16:19:55,924 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-27 16:19:55,998 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-27 16:19:55,998 INFO L293 CfgBuilder]: Performing block encoding [2024-06-27 16:19:56,059 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-27 16:19:56,059 INFO L320 CfgBuilder]: Removed 1 assume(true) statements. [2024-06-27 16:19:56,060 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.06 04:19:56 BoogieIcfgContainer [2024-06-27 16:19:56,060 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-27 16:19:56,071 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-27 16:19:56,072 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-27 16:19:56,075 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-27 16:19:56,075 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.06 04:19:55" (1/3) ... [2024-06-27 16:19:56,076 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1a6523bd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.06 04:19:56, skipping insertion in model container [2024-06-27 16:19:56,076 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 04:19:55" (2/3) ... [2024-06-27 16:19:56,076 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1a6523bd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.06 04:19:56, skipping insertion in model container [2024-06-27 16:19:56,076 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.06 04:19:56" (3/3) ... [2024-06-27 16:19:56,078 INFO L112 eAbstractionObserver]: Analyzing ICFG 14_spin2003.i [2024-06-27 16:19:56,085 WARN L146 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2024-06-27 16:19:56,093 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-27 16:19:56,093 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-06-27 16:19:56,093 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-27 16:19:56,119 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-06-27 16:19:56,142 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 16 places, 14 transitions, 32 flow [2024-06-27 16:19:56,156 INFO L124 PetriNetUnfolderBase]: 1/16 cut-off events. [2024-06-27 16:19:56,157 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-27 16:19:56,161 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20 conditions, 16 events. 1/16 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 14 event pairs, 0 based on Foata normal form. 0/12 useless extension candidates. Maximal degree in co-relation 11. Up to 2 conditions per place. [2024-06-27 16:19:56,161 INFO L82 GeneralOperation]: Start removeDead. Operand has 16 places, 14 transitions, 32 flow [2024-06-27 16:19:56,164 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 16 places, 14 transitions, 32 flow [2024-06-27 16:19:56,174 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-27 16:19:56,189 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopHeads, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@3769c94f, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-27 16:19:56,191 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2024-06-27 16:19:56,199 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-27 16:19:56,203 INFO L124 PetriNetUnfolderBase]: 0/8 cut-off events. [2024-06-27 16:19:56,203 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-27 16:19:56,203 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:19:56,204 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1] [2024-06-27 16:19:56,205 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-06-27 16:19:56,209 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:19:56,211 INFO L85 PathProgramCache]: Analyzing trace with hash 145098612, now seen corresponding path program 1 times [2024-06-27 16:19:56,219 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:19:56,220 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [806680136] [2024-06-27 16:19:56,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:19:56,221 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:19:56,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-06-27 16:19:56,316 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2024-06-27 16:19:56,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-06-27 16:19:56,358 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2024-06-27 16:19:56,360 INFO L360 BasicCegarLoop]: Counterexample is feasible [2024-06-27 16:19:56,361 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 3 remaining) [2024-06-27 16:19:56,362 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 3 remaining) [2024-06-27 16:19:56,362 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 3 remaining) [2024-06-27 16:19:56,363 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-27 16:19:56,363 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2024-06-27 16:19:56,370 WARN L234 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2024-06-27 16:19:56,371 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2024-06-27 16:19:56,395 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-06-27 16:19:56,399 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 27 places, 24 transitions, 58 flow [2024-06-27 16:19:56,405 INFO L124 PetriNetUnfolderBase]: 2/28 cut-off events. [2024-06-27 16:19:56,408 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-06-27 16:19:56,409 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36 conditions, 28 events. 2/28 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 59 event pairs, 0 based on Foata normal form. 0/21 useless extension candidates. Maximal degree in co-relation 20. Up to 3 conditions per place. [2024-06-27 16:19:56,409 INFO L82 GeneralOperation]: Start removeDead. Operand has 27 places, 24 transitions, 58 flow [2024-06-27 16:19:56,411 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 27 places, 24 transitions, 58 flow [2024-06-27 16:19:56,413 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-27 16:19:56,414 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopHeads, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@3769c94f, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-27 16:19:56,414 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2024-06-27 16:19:56,425 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-27 16:19:56,425 INFO L124 PetriNetUnfolderBase]: 1/17 cut-off events. [2024-06-27 16:19:56,425 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-06-27 16:19:56,426 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:19:56,426 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1] [2024-06-27 16:19:56,426 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2024-06-27 16:19:56,426 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:19:56,426 INFO L85 PathProgramCache]: Analyzing trace with hash -1750573610, now seen corresponding path program 1 times [2024-06-27 16:19:56,427 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:19:56,427 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [785557198] [2024-06-27 16:19:56,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:19:56,428 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:19:56,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-06-27 16:19:56,442 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2024-06-27 16:19:56,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-06-27 16:19:56,497 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2024-06-27 16:19:56,497 INFO L360 BasicCegarLoop]: Counterexample is feasible [2024-06-27 16:19:56,497 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (3 of 4 remaining) [2024-06-27 16:19:56,498 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 4 remaining) [2024-06-27 16:19:56,498 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 4 remaining) [2024-06-27 16:19:56,498 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 4 remaining) [2024-06-27 16:19:56,498 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-06-27 16:19:56,498 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2024-06-27 16:19:56,499 WARN L234 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2024-06-27 16:19:56,499 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2024-06-27 16:19:56,546 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-06-27 16:19:56,547 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 38 places, 34 transitions, 86 flow [2024-06-27 16:19:56,555 INFO L124 PetriNetUnfolderBase]: 3/40 cut-off events. [2024-06-27 16:19:56,555 INFO L125 PetriNetUnfolderBase]: For 7/7 co-relation queries the response was YES. [2024-06-27 16:19:56,555 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53 conditions, 40 events. 3/40 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 105 event pairs, 0 based on Foata normal form. 0/30 useless extension candidates. Maximal degree in co-relation 34. Up to 4 conditions per place. [2024-06-27 16:19:56,556 INFO L82 GeneralOperation]: Start removeDead. Operand has 38 places, 34 transitions, 86 flow [2024-06-27 16:19:56,556 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 38 places, 34 transitions, 86 flow [2024-06-27 16:19:56,557 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-27 16:19:56,558 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopHeads, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@3769c94f, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-27 16:19:56,558 INFO L358 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2024-06-27 16:19:56,561 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-27 16:19:56,561 INFO L124 PetriNetUnfolderBase]: 1/18 cut-off events. [2024-06-27 16:19:56,562 INFO L125 PetriNetUnfolderBase]: For 4/4 co-relation queries the response was YES. [2024-06-27 16:19:56,562 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:19:56,562 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 16:19:56,562 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-06-27 16:19:56,562 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:19:56,562 INFO L85 PathProgramCache]: Analyzing trace with hash 2078378386, now seen corresponding path program 1 times [2024-06-27 16:19:56,563 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:19:56,563 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [379186230] [2024-06-27 16:19:56,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:19:56,563 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:19:56,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:19:56,656 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 16:19:56,656 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:19:56,657 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [379186230] [2024-06-27 16:19:56,657 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [379186230] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 16:19:56,657 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 16:19:56,658 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-27 16:19:56,658 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1328502479] [2024-06-27 16:19:56,658 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 16:19:56,664 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-27 16:19:56,668 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:19:56,689 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-27 16:19:56,690 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-27 16:19:56,701 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 34 [2024-06-27 16:19:56,703 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 38 places, 34 transitions, 86 flow. Second operand has 3 states, 3 states have (on average 12.0) internal successors, (36), 3 states have internal predecessors, (36), 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) [2024-06-27 16:19:56,703 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:19:56,704 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 34 [2024-06-27 16:19:56,704 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 16:19:56,839 INFO L124 PetriNetUnfolderBase]: 564/973 cut-off events. [2024-06-27 16:19:56,839 INFO L125 PetriNetUnfolderBase]: For 197/197 co-relation queries the response was YES. [2024-06-27 16:19:56,843 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1971 conditions, 973 events. 564/973 cut-off events. For 197/197 co-relation queries the response was YES. Maximal size of possible extension queue 62. Compared 4968 event pairs, 564 based on Foata normal form. 172/1132 useless extension candidates. Maximal degree in co-relation 425. Up to 876 conditions per place. [2024-06-27 16:19:56,849 INFO L140 encePairwiseOnDemand]: 29/34 looper letters, 16 selfloop transitions, 1 changer transitions 0/24 dead transitions. [2024-06-27 16:19:56,849 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 33 places, 24 transitions, 100 flow [2024-06-27 16:19:56,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-27 16:19:56,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-27 16:19:56,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 51 transitions. [2024-06-27 16:19:56,859 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5 [2024-06-27 16:19:56,861 INFO L175 Difference]: Start difference. First operand has 38 places, 34 transitions, 86 flow. Second operand 3 states and 51 transitions. [2024-06-27 16:19:56,863 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 33 places, 24 transitions, 100 flow [2024-06-27 16:19:56,866 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 33 places, 24 transitions, 98 flow, removed 1 selfloop flow, removed 0 redundant places. [2024-06-27 16:19:56,868 INFO L231 Difference]: Finished difference. Result has 33 places, 24 transitions, 66 flow [2024-06-27 16:19:56,869 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=64, PETRI_DIFFERENCE_MINUEND_PLACES=31, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=24, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=66, PETRI_PLACES=33, PETRI_TRANSITIONS=24} [2024-06-27 16:19:56,872 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, -5 predicate places. [2024-06-27 16:19:56,873 INFO L495 AbstractCegarLoop]: Abstraction has has 33 places, 24 transitions, 66 flow [2024-06-27 16:19:56,873 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 12.0) internal successors, (36), 3 states have internal predecessors, (36), 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) [2024-06-27 16:19:56,873 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:19:56,873 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1, 1, 1] [2024-06-27 16:19:56,877 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-06-27 16:19:56,877 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-06-27 16:19:56,878 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:19:56,878 INFO L85 PathProgramCache]: Analyzing trace with hash -349841451, now seen corresponding path program 1 times [2024-06-27 16:19:56,878 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:19:56,878 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1292867202] [2024-06-27 16:19:56,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:19:56,879 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:19:56,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-06-27 16:19:56,897 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2024-06-27 16:19:56,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-06-27 16:19:56,904 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2024-06-27 16:19:56,904 INFO L360 BasicCegarLoop]: Counterexample is feasible [2024-06-27 16:19:56,905 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (4 of 5 remaining) [2024-06-27 16:19:56,905 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (3 of 5 remaining) [2024-06-27 16:19:56,905 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 5 remaining) [2024-06-27 16:19:56,905 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 5 remaining) [2024-06-27 16:19:56,905 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 5 remaining) [2024-06-27 16:19:56,906 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-06-27 16:19:56,906 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1] [2024-06-27 16:19:56,906 WARN L234 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2024-06-27 16:19:56,906 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2024-06-27 16:19:56,921 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-06-27 16:19:56,923 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 49 places, 44 transitions, 116 flow [2024-06-27 16:19:56,928 INFO L124 PetriNetUnfolderBase]: 4/52 cut-off events. [2024-06-27 16:19:56,928 INFO L125 PetriNetUnfolderBase]: For 16/16 co-relation queries the response was YES. [2024-06-27 16:19:56,928 INFO L83 FinitePrefix]: Finished finitePrefix Result has 71 conditions, 52 events. 4/52 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 141 event pairs, 0 based on Foata normal form. 0/39 useless extension candidates. Maximal degree in co-relation 51. Up to 5 conditions per place. [2024-06-27 16:19:56,929 INFO L82 GeneralOperation]: Start removeDead. Operand has 49 places, 44 transitions, 116 flow [2024-06-27 16:19:56,930 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 49 places, 44 transitions, 116 flow [2024-06-27 16:19:56,931 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-27 16:19:56,932 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopHeads, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@3769c94f, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-27 16:19:56,932 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2024-06-27 16:19:56,933 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-27 16:19:56,933 INFO L124 PetriNetUnfolderBase]: 1/18 cut-off events. [2024-06-27 16:19:56,934 INFO L125 PetriNetUnfolderBase]: For 4/4 co-relation queries the response was YES. [2024-06-27 16:19:56,934 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:19:56,934 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 16:19:56,934 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2024-06-27 16:19:56,934 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:19:56,934 INFO L85 PathProgramCache]: Analyzing trace with hash -878966030, now seen corresponding path program 1 times [2024-06-27 16:19:56,935 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:19:56,935 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1709186730] [2024-06-27 16:19:56,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:19:56,935 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:19:56,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:19:56,958 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 16:19:56,958 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:19:56,958 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1709186730] [2024-06-27 16:19:56,958 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1709186730] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 16:19:56,958 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 16:19:56,959 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-27 16:19:56,959 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1945348182] [2024-06-27 16:19:56,959 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 16:19:56,959 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-27 16:19:56,959 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:19:56,960 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-27 16:19:56,960 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-27 16:19:56,970 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 44 [2024-06-27 16:19:56,971 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 44 transitions, 116 flow. Second operand has 3 states, 3 states have (on average 15.0) internal successors, (45), 3 states have internal predecessors, (45), 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) [2024-06-27 16:19:56,971 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:19:56,971 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 44 [2024-06-27 16:19:56,971 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 16:19:57,417 INFO L124 PetriNetUnfolderBase]: 4064/6083 cut-off events. [2024-06-27 16:19:57,418 INFO L125 PetriNetUnfolderBase]: For 1719/1719 co-relation queries the response was YES. [2024-06-27 16:19:57,426 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12457 conditions, 6083 events. 4064/6083 cut-off events. For 1719/1719 co-relation queries the response was YES. Maximal size of possible extension queue 283. Compared 35305 event pairs, 4064 based on Foata normal form. 1172/7194 useless extension candidates. Maximal degree in co-relation 1995. Up to 5626 conditions per place. [2024-06-27 16:19:57,448 INFO L140 encePairwiseOnDemand]: 38/44 looper letters, 21 selfloop transitions, 1 changer transitions 0/31 dead transitions. [2024-06-27 16:19:57,448 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 42 places, 31 transitions, 134 flow [2024-06-27 16:19:57,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-27 16:19:57,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-27 16:19:57,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 66 transitions. [2024-06-27 16:19:57,451 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5 [2024-06-27 16:19:57,451 INFO L175 Difference]: Start difference. First operand has 49 places, 44 transitions, 116 flow. Second operand 3 states and 66 transitions. [2024-06-27 16:19:57,451 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 42 places, 31 transitions, 134 flow [2024-06-27 16:19:57,456 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 31 transitions, 128 flow, removed 3 selfloop flow, removed 0 redundant places. [2024-06-27 16:19:57,457 INFO L231 Difference]: Finished difference. Result has 42 places, 31 transitions, 86 flow [2024-06-27 16:19:57,458 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=84, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=86, PETRI_PLACES=42, PETRI_TRANSITIONS=31} [2024-06-27 16:19:57,459 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, -7 predicate places. [2024-06-27 16:19:57,459 INFO L495 AbstractCegarLoop]: Abstraction has has 42 places, 31 transitions, 86 flow [2024-06-27 16:19:57,459 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 15.0) internal successors, (45), 3 states have internal predecessors, (45), 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) [2024-06-27 16:19:57,459 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:19:57,460 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 1, 1, 1, 1, 1, 1] [2024-06-27 16:19:57,460 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-06-27 16:19:57,460 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2024-06-27 16:19:57,460 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:19:57,460 INFO L85 PathProgramCache]: Analyzing trace with hash 463168177, now seen corresponding path program 1 times [2024-06-27 16:19:57,461 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:19:57,461 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1478527463] [2024-06-27 16:19:57,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:19:57,461 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:19:57,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-06-27 16:19:57,476 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2024-06-27 16:19:57,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-06-27 16:19:57,537 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2024-06-27 16:19:57,537 INFO L360 BasicCegarLoop]: Counterexample is feasible [2024-06-27 16:19:57,537 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (5 of 6 remaining) [2024-06-27 16:19:57,537 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (4 of 6 remaining) [2024-06-27 16:19:57,537 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (3 of 6 remaining) [2024-06-27 16:19:57,537 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 6 remaining) [2024-06-27 16:19:57,538 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 6 remaining) [2024-06-27 16:19:57,538 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 6 remaining) [2024-06-27 16:19:57,538 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-06-27 16:19:57,538 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1] [2024-06-27 16:19:57,538 WARN L234 ceAbstractionStarter]: 4 thread instances were not sufficient, I will increase this number and restart the analysis [2024-06-27 16:19:57,538 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 5 thread instances. [2024-06-27 16:19:57,559 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-06-27 16:19:57,561 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 60 places, 54 transitions, 148 flow [2024-06-27 16:19:57,565 INFO L124 PetriNetUnfolderBase]: 5/64 cut-off events. [2024-06-27 16:19:57,565 INFO L125 PetriNetUnfolderBase]: For 30/30 co-relation queries the response was YES. [2024-06-27 16:19:57,567 INFO L83 FinitePrefix]: Finished finitePrefix Result has 90 conditions, 64 events. 5/64 cut-off events. For 30/30 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 179 event pairs, 0 based on Foata normal form. 0/48 useless extension candidates. Maximal degree in co-relation 69. Up to 6 conditions per place. [2024-06-27 16:19:57,567 INFO L82 GeneralOperation]: Start removeDead. Operand has 60 places, 54 transitions, 148 flow [2024-06-27 16:19:57,567 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 60 places, 54 transitions, 148 flow [2024-06-27 16:19:57,568 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-27 16:19:57,573 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopHeads, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@3769c94f, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-27 16:19:57,573 INFO L358 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2024-06-27 16:19:57,575 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-27 16:19:57,575 INFO L124 PetriNetUnfolderBase]: 1/18 cut-off events. [2024-06-27 16:19:57,575 INFO L125 PetriNetUnfolderBase]: For 4/4 co-relation queries the response was YES. [2024-06-27 16:19:57,576 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:19:57,578 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 16:19:57,578 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2024-06-27 16:19:57,579 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:19:57,579 INFO L85 PathProgramCache]: Analyzing trace with hash 1270650304, now seen corresponding path program 1 times [2024-06-27 16:19:57,579 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:19:57,579 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2026476232] [2024-06-27 16:19:57,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:19:57,579 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:19:57,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:19:57,614 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 16:19:57,614 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:19:57,614 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2026476232] [2024-06-27 16:19:57,614 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2026476232] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 16:19:57,615 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 16:19:57,615 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-27 16:19:57,615 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [573043677] [2024-06-27 16:19:57,615 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 16:19:57,615 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-27 16:19:57,616 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:19:57,616 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-27 16:19:57,616 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-27 16:19:57,628 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 54 [2024-06-27 16:19:57,628 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 54 transitions, 148 flow. Second operand has 3 states, 3 states have (on average 18.0) internal successors, (54), 3 states have internal predecessors, (54), 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) [2024-06-27 16:19:57,629 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:19:57,629 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 54 [2024-06-27 16:19:57,629 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 16:19:59,956 INFO L124 PetriNetUnfolderBase]: 26564/36649 cut-off events. [2024-06-27 16:19:59,957 INFO L125 PetriNetUnfolderBase]: For 13590/13590 co-relation queries the response was YES. [2024-06-27 16:20:00,038 INFO L83 FinitePrefix]: Finished finitePrefix Result has 75524 conditions, 36649 events. 26564/36649 cut-off events. For 13590/13590 co-relation queries the response was YES. Maximal size of possible extension queue 1322. Compared 230058 event pairs, 26564 based on Foata normal form. 7422/43770 useless extension candidates. Maximal degree in co-relation 12605. Up to 34376 conditions per place. [2024-06-27 16:20:00,311 INFO L140 encePairwiseOnDemand]: 47/54 looper letters, 26 selfloop transitions, 1 changer transitions 0/38 dead transitions. [2024-06-27 16:20:00,312 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 51 places, 38 transitions, 170 flow [2024-06-27 16:20:00,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-27 16:20:00,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-27 16:20:00,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 81 transitions. [2024-06-27 16:20:00,313 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5 [2024-06-27 16:20:00,313 INFO L175 Difference]: Start difference. First operand has 60 places, 54 transitions, 148 flow. Second operand 3 states and 81 transitions. [2024-06-27 16:20:00,313 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 51 places, 38 transitions, 170 flow [2024-06-27 16:20:00,317 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 38 transitions, 158 flow, removed 6 selfloop flow, removed 0 redundant places. [2024-06-27 16:20:00,318 INFO L231 Difference]: Finished difference. Result has 51 places, 38 transitions, 106 flow [2024-06-27 16:20:00,318 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=104, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=106, PETRI_PLACES=51, PETRI_TRANSITIONS=38} [2024-06-27 16:20:00,318 INFO L281 CegarLoopForPetriNet]: 60 programPoint places, -9 predicate places. [2024-06-27 16:20:00,318 INFO L495 AbstractCegarLoop]: Abstraction has has 51 places, 38 transitions, 106 flow [2024-06-27 16:20:00,319 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 18.0) internal successors, (54), 3 states have internal predecessors, (54), 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) [2024-06-27 16:20:00,319 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:20:00,319 INFO L208 CegarLoopForPetriNet]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 16:20:00,319 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-06-27 16:20:00,319 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2024-06-27 16:20:00,320 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:20:00,320 INFO L85 PathProgramCache]: Analyzing trace with hash -2014962774, now seen corresponding path program 1 times [2024-06-27 16:20:00,320 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:20:00,320 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1770835389] [2024-06-27 16:20:00,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:20:00,320 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:20:00,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-06-27 16:20:00,327 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2024-06-27 16:20:00,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-06-27 16:20:00,336 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2024-06-27 16:20:00,337 INFO L360 BasicCegarLoop]: Counterexample is feasible [2024-06-27 16:20:00,337 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (6 of 7 remaining) [2024-06-27 16:20:00,337 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (5 of 7 remaining) [2024-06-27 16:20:00,337 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (4 of 7 remaining) [2024-06-27 16:20:00,337 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (3 of 7 remaining) [2024-06-27 16:20:00,337 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 7 remaining) [2024-06-27 16:20:00,338 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 7 remaining) [2024-06-27 16:20:00,338 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 7 remaining) [2024-06-27 16:20:00,338 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-06-27 16:20:00,338 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1] [2024-06-27 16:20:00,339 WARN L234 ceAbstractionStarter]: 5 thread instances were not sufficient, I will increase this number and restart the analysis [2024-06-27 16:20:00,339 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 6 thread instances. [2024-06-27 16:20:00,358 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-06-27 16:20:00,360 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 71 places, 64 transitions, 182 flow [2024-06-27 16:20:00,366 INFO L124 PetriNetUnfolderBase]: 6/76 cut-off events. [2024-06-27 16:20:00,366 INFO L125 PetriNetUnfolderBase]: For 50/50 co-relation queries the response was YES. [2024-06-27 16:20:00,367 INFO L83 FinitePrefix]: Finished finitePrefix Result has 110 conditions, 76 events. 6/76 cut-off events. For 50/50 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 223 event pairs, 0 based on Foata normal form. 0/57 useless extension candidates. Maximal degree in co-relation 88. Up to 7 conditions per place. [2024-06-27 16:20:00,367 INFO L82 GeneralOperation]: Start removeDead. Operand has 71 places, 64 transitions, 182 flow [2024-06-27 16:20:00,368 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 71 places, 64 transitions, 182 flow [2024-06-27 16:20:00,369 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-27 16:20:00,370 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopHeads, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@3769c94f, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-27 16:20:00,370 INFO L358 AbstractCegarLoop]: Starting to check reachability of 8 error locations. [2024-06-27 16:20:00,372 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-27 16:20:00,373 INFO L124 PetriNetUnfolderBase]: 1/18 cut-off events. [2024-06-27 16:20:00,373 INFO L125 PetriNetUnfolderBase]: For 4/4 co-relation queries the response was YES. [2024-06-27 16:20:00,373 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:20:00,373 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 16:20:00,373 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 5 more)] === [2024-06-27 16:20:00,373 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:20:00,373 INFO L85 PathProgramCache]: Analyzing trace with hash -36940969, now seen corresponding path program 1 times [2024-06-27 16:20:00,374 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:20:00,374 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2048546501] [2024-06-27 16:20:00,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:20:00,374 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:20:00,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:20:00,411 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 16:20:00,411 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:20:00,411 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2048546501] [2024-06-27 16:20:00,412 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2048546501] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 16:20:00,413 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 16:20:00,413 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-27 16:20:00,413 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [883273578] [2024-06-27 16:20:00,413 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 16:20:00,414 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-27 16:20:00,414 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:20:00,414 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-27 16:20:00,415 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-27 16:20:00,432 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 64 [2024-06-27 16:20:00,434 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 64 transitions, 182 flow. Second operand has 3 states, 3 states have (on average 21.0) internal successors, (63), 3 states have internal predecessors, (63), 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) [2024-06-27 16:20:00,434 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:20:00,434 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 64 [2024-06-27 16:20:00,434 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 16:20:12,807 INFO L124 PetriNetUnfolderBase]: 164064/214479 cut-off events. [2024-06-27 16:20:12,807 INFO L125 PetriNetUnfolderBase]: For 98095/98095 co-relation queries the response was YES. [2024-06-27 16:20:13,373 INFO L83 FinitePrefix]: Finished finitePrefix Result has 443980 conditions, 214479 events. 164064/214479 cut-off events. For 98095/98095 co-relation queries the response was YES. Maximal size of possible extension queue 6190. Compared 1414808 event pairs, 164064 based on Foata normal form. 44922/257900 useless extension candidates. Maximal degree in co-relation 76296. Up to 203126 conditions per place. [2024-06-27 16:20:14,210 INFO L140 encePairwiseOnDemand]: 56/64 looper letters, 31 selfloop transitions, 1 changer transitions 0/45 dead transitions. [2024-06-27 16:20:14,211 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 45 transitions, 208 flow [2024-06-27 16:20:14,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-27 16:20:14,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-27 16:20:14,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 96 transitions. [2024-06-27 16:20:14,212 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5 [2024-06-27 16:20:14,213 INFO L175 Difference]: Start difference. First operand has 71 places, 64 transitions, 182 flow. Second operand 3 states and 96 transitions. [2024-06-27 16:20:14,213 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 45 transitions, 208 flow [2024-06-27 16:20:14,251 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 45 transitions, 188 flow, removed 10 selfloop flow, removed 0 redundant places. [2024-06-27 16:20:14,252 INFO L231 Difference]: Finished difference. Result has 60 places, 45 transitions, 126 flow [2024-06-27 16:20:14,252 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=64, PETRI_DIFFERENCE_MINUEND_FLOW=124, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=126, PETRI_PLACES=60, PETRI_TRANSITIONS=45} [2024-06-27 16:20:14,252 INFO L281 CegarLoopForPetriNet]: 71 programPoint places, -11 predicate places. [2024-06-27 16:20:14,252 INFO L495 AbstractCegarLoop]: Abstraction has has 60 places, 45 transitions, 126 flow [2024-06-27 16:20:14,253 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.0) internal successors, (63), 3 states have internal predecessors, (63), 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) [2024-06-27 16:20:14,253 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:20:14,253 INFO L208 CegarLoopForPetriNet]: trace histogram [7, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 16:20:14,253 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-06-27 16:20:14,253 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 5 more)] === [2024-06-27 16:20:14,254 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:20:14,254 INFO L85 PathProgramCache]: Analyzing trace with hash 1396920320, now seen corresponding path program 1 times [2024-06-27 16:20:14,254 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:20:14,254 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1115221014] [2024-06-27 16:20:14,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:20:14,254 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:20:14,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-06-27 16:20:14,262 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2024-06-27 16:20:14,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-06-27 16:20:14,271 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2024-06-27 16:20:14,271 INFO L360 BasicCegarLoop]: Counterexample is feasible [2024-06-27 16:20:14,271 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (7 of 8 remaining) [2024-06-27 16:20:14,272 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (6 of 8 remaining) [2024-06-27 16:20:14,272 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (5 of 8 remaining) [2024-06-27 16:20:14,272 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (4 of 8 remaining) [2024-06-27 16:20:14,272 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (3 of 8 remaining) [2024-06-27 16:20:14,272 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 8 remaining) [2024-06-27 16:20:14,272 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 8 remaining) [2024-06-27 16:20:14,273 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 8 remaining) [2024-06-27 16:20:14,273 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-06-27 16:20:14,273 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1] [2024-06-27 16:20:14,273 WARN L234 ceAbstractionStarter]: 6 thread instances were not sufficient, I will increase this number and restart the analysis [2024-06-27 16:20:14,273 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 7 thread instances. [2024-06-27 16:20:14,293 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-06-27 16:20:14,297 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 82 places, 74 transitions, 218 flow [2024-06-27 16:20:14,302 INFO L124 PetriNetUnfolderBase]: 7/88 cut-off events. [2024-06-27 16:20:14,303 INFO L125 PetriNetUnfolderBase]: For 77/77 co-relation queries the response was YES. [2024-06-27 16:20:14,304 INFO L83 FinitePrefix]: Finished finitePrefix Result has 131 conditions, 88 events. 7/88 cut-off events. For 77/77 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 273 event pairs, 0 based on Foata normal form. 0/66 useless extension candidates. Maximal degree in co-relation 108. Up to 8 conditions per place. [2024-06-27 16:20:14,304 INFO L82 GeneralOperation]: Start removeDead. Operand has 82 places, 74 transitions, 218 flow [2024-06-27 16:20:14,305 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 82 places, 74 transitions, 218 flow [2024-06-27 16:20:14,306 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-27 16:20:14,308 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopHeads, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@3769c94f, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-27 16:20:14,308 INFO L358 AbstractCegarLoop]: Starting to check reachability of 9 error locations. [2024-06-27 16:20:14,309 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-27 16:20:14,310 INFO L124 PetriNetUnfolderBase]: 1/18 cut-off events. [2024-06-27 16:20:14,310 INFO L125 PetriNetUnfolderBase]: For 4/4 co-relation queries the response was YES. [2024-06-27 16:20:14,310 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:20:14,310 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 16:20:14,310 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 6 more)] === [2024-06-27 16:20:14,310 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:20:14,310 INFO L85 PathProgramCache]: Analyzing trace with hash -489595063, now seen corresponding path program 1 times [2024-06-27 16:20:14,311 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:20:14,311 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [117389677] [2024-06-27 16:20:14,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:20:14,311 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:20:14,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:20:14,338 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 16:20:14,338 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:20:14,338 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [117389677] [2024-06-27 16:20:14,339 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [117389677] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 16:20:14,339 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 16:20:14,339 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-27 16:20:14,339 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1532905628] [2024-06-27 16:20:14,339 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 16:20:14,339 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-27 16:20:14,340 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:20:14,340 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-27 16:20:14,340 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-27 16:20:14,361 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 22 out of 74 [2024-06-27 16:20:14,362 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 82 places, 74 transitions, 218 flow. Second operand has 3 states, 3 states have (on average 24.0) internal successors, (72), 3 states have internal predecessors, (72), 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) [2024-06-27 16:20:14,362 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:20:14,362 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 22 of 74 [2024-06-27 16:20:14,362 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand