./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-lit/sssc12.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version a046e57d 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-lit/sssc12.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 f04269da33313e0538e960083eba1e7b90d9e89847d2a89d06392d6991a3ed98 --- Real Ultimate output --- This is Ultimate 0.2.5-tmp.dk.eval-mul-div-a046e57-m [2024-10-13 06:59:51,123 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-10-13 06:59:51,177 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-10-13 06:59:51,180 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-10-13 06:59:51,181 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-10-13 06:59:51,200 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-10-13 06:59:51,201 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-10-13 06:59:51,202 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-10-13 06:59:51,202 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-10-13 06:59:51,203 INFO L153 SettingsManager]: * Use memory slicer=true [2024-10-13 06:59:51,204 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-10-13 06:59:51,204 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-10-13 06:59:51,204 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-10-13 06:59:51,206 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-10-13 06:59:51,206 INFO L153 SettingsManager]: * Use SBE=true [2024-10-13 06:59:51,207 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-10-13 06:59:51,207 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-10-13 06:59:51,207 INFO L153 SettingsManager]: * sizeof long=4 [2024-10-13 06:59:51,207 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-10-13 06:59:51,208 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-10-13 06:59:51,208 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-10-13 06:59:51,211 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-10-13 06:59:51,211 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-10-13 06:59:51,211 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-10-13 06:59:51,211 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-10-13 06:59:51,212 INFO L153 SettingsManager]: * sizeof long double=12 [2024-10-13 06:59:51,212 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-10-13 06:59:51,212 INFO L153 SettingsManager]: * Use constant arrays=true [2024-10-13 06:59:51,212 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-10-13 06:59:51,212 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-10-13 06:59:51,213 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-10-13 06:59:51,213 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-10-13 06:59:51,213 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-13 06:59:51,213 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-10-13 06:59:51,213 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-10-13 06:59:51,213 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-10-13 06:59:51,214 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-10-13 06:59:51,214 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-10-13 06:59:51,214 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-10-13 06:59:51,214 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-10-13 06:59:51,215 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-10-13 06:59:51,215 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-10-13 06:59:51,215 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> f04269da33313e0538e960083eba1e7b90d9e89847d2a89d06392d6991a3ed98 [2024-10-13 06:59:51,429 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-10-13 06:59:51,463 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-10-13 06:59:51,465 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-10-13 06:59:51,466 INFO L270 PluginConnector]: Initializing CDTParser... [2024-10-13 06:59:51,466 INFO L274 PluginConnector]: CDTParser initialized [2024-10-13 06:59:51,467 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/pthread-lit/sssc12.i [2024-10-13 06:59:52,892 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-10-13 06:59:53,167 INFO L384 CDTParser]: Found 1 translation units. [2024-10-13 06:59:53,167 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/pthread-lit/sssc12.i [2024-10-13 06:59:53,187 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2a7ab706a/a08ada6a82f449cd819d9dfaeea26fbf/FLAGc6c48f0ac [2024-10-13 06:59:53,199 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2a7ab706a/a08ada6a82f449cd819d9dfaeea26fbf [2024-10-13 06:59:53,201 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-10-13 06:59:53,203 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-10-13 06:59:53,204 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-10-13 06:59:53,204 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-10-13 06:59:53,210 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-10-13 06:59:53,210 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 06:59:53" (1/1) ... [2024-10-13 06:59:53,211 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2597640f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:59:53, skipping insertion in model container [2024-10-13 06:59:53,211 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 06:59:53" (1/1) ... [2024-10-13 06:59:53,258 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-10-13 06:59:53,608 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-lit/sssc12.i[46865,46878] [2024-10-13 06:59:53,653 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-13 06:59:53,662 INFO L200 MainTranslator]: Completed pre-run [2024-10-13 06:59:53,703 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-lit/sssc12.i[46865,46878] [2024-10-13 06:59:53,707 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-13 06:59:53,755 INFO L204 MainTranslator]: Completed translation [2024-10-13 06:59:53,756 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:59:53 WrapperNode [2024-10-13 06:59:53,756 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-10-13 06:59:53,757 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-10-13 06:59:53,758 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-10-13 06:59:53,758 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-10-13 06:59:53,763 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:59:53" (1/1) ... [2024-10-13 06:59:53,786 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:59:53" (1/1) ... [2024-10-13 06:59:53,813 INFO L138 Inliner]: procedures = 274, calls = 19, calls flagged for inlining = 8, calls inlined = 8, statements flattened = 78 [2024-10-13 06:59:53,816 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-10-13 06:59:53,817 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-10-13 06:59:53,817 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-10-13 06:59:53,817 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-10-13 06:59:53,826 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:59:53" (1/1) ... [2024-10-13 06:59:53,827 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:59:53" (1/1) ... [2024-10-13 06:59:53,832 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:59:53" (1/1) ... [2024-10-13 06:59:53,856 INFO L175 MemorySlicer]: Split 3 memory accesses to 2 slices as follows [2, 1]. 67 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0]. The 1 writes are split as follows [0, 1]. [2024-10-13 06:59:53,856 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:59:53" (1/1) ... [2024-10-13 06:59:53,857 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:59:53" (1/1) ... [2024-10-13 06:59:53,860 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:59:53" (1/1) ... [2024-10-13 06:59:53,863 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:59:53" (1/1) ... [2024-10-13 06:59:53,864 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:59:53" (1/1) ... [2024-10-13 06:59:53,865 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:59:53" (1/1) ... [2024-10-13 06:59:53,870 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-10-13 06:59:53,871 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-10-13 06:59:53,871 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-10-13 06:59:53,871 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-10-13 06:59:53,872 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:59:53" (1/1) ... [2024-10-13 06:59:53,884 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-13 06:59:53,896 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-13 06:59:53,913 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) [2024-10-13 06:59:53,922 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 [2024-10-13 06:59:53,955 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-10-13 06:59:53,955 INFO L130 BoogieDeclarations]: Found specification of procedure thr [2024-10-13 06:59:53,955 INFO L138 BoogieDeclarations]: Found implementation of procedure thr [2024-10-13 06:59:53,955 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-10-13 06:59:53,956 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-10-13 06:59:53,956 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-10-13 06:59:53,956 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-10-13 06:59:53,956 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-10-13 06:59:53,956 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-10-13 06:59:53,956 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-10-13 06:59:53,956 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-10-13 06:59:53,956 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-10-13 06:59:53,960 WARN L207 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2024-10-13 06:59:54,126 INFO L238 CfgBuilder]: Building ICFG [2024-10-13 06:59:54,128 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-10-13 06:59:54,285 INFO L283 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-10-13 06:59:54,285 INFO L287 CfgBuilder]: Performing block encoding [2024-10-13 06:59:54,399 INFO L309 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-10-13 06:59:54,399 INFO L314 CfgBuilder]: Removed 2 assume(true) statements. [2024-10-13 06:59:54,400 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 06:59:54 BoogieIcfgContainer [2024-10-13 06:59:54,400 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-10-13 06:59:54,403 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-10-13 06:59:54,403 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-10-13 06:59:54,406 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-10-13 06:59:54,406 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 06:59:53" (1/3) ... [2024-10-13 06:59:54,408 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@47d1bdde and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 06:59:54, skipping insertion in model container [2024-10-13 06:59:54,408 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:59:53" (2/3) ... [2024-10-13 06:59:54,408 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@47d1bdde and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 06:59:54, skipping insertion in model container [2024-10-13 06:59:54,408 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 06:59:54" (3/3) ... [2024-10-13 06:59:54,410 INFO L112 eAbstractionObserver]: Analyzing ICFG sssc12.i [2024-10-13 06:59:54,424 INFO L209 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-10-13 06:59:54,424 INFO L149 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-10-13 06:59:54,424 INFO L484 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-10-13 06:59:54,454 INFO L143 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-10-13 06:59:54,488 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 19 places, 18 transitions, 40 flow [2024-10-13 06:59:54,512 INFO L124 PetriNetUnfolderBase]: 2/20 cut-off events. [2024-10-13 06:59:54,513 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-10-13 06:59:54,521 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24 conditions, 20 events. 2/20 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 18 event pairs, 0 based on Foata normal form. 0/15 useless extension candidates. Maximal degree in co-relation 15. Up to 2 conditions per place. [2024-10-13 06:59:54,522 INFO L82 GeneralOperation]: Start removeDead. Operand has 19 places, 18 transitions, 40 flow [2024-10-13 06:59:54,524 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 19 places, 18 transitions, 40 flow [2024-10-13 06:59:54,535 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-10-13 06:59:54,540 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;@32621587, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-10-13 06:59:54,540 INFO L334 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2024-10-13 06:59:54,544 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-10-13 06:59:54,544 INFO L124 PetriNetUnfolderBase]: 0/9 cut-off events. [2024-10-13 06:59:54,544 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-10-13 06:59:54,545 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-13 06:59:54,545 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2024-10-13 06:59:54,545 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thrErr0ASSERT_VIOLATIONERROR_FUNCTION, thrErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-13 06:59:54,550 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 06:59:54,550 INFO L85 PathProgramCache]: Analyzing trace with hash -1343125734, now seen corresponding path program 1 times [2024-10-13 06:59:54,557 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 06:59:54,558 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [163910587] [2024-10-13 06:59:54,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 06:59:54,558 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 06:59:54,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-10-13 06:59:54,667 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2024-10-13 06:59:54,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-10-13 06:59:54,706 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2024-10-13 06:59:54,707 INFO L325 BasicCegarLoop]: Counterexample is feasible [2024-10-13 06:59:54,709 INFO L782 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 3 remaining) [2024-10-13 06:59:54,711 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thrErr0ASSERT_VIOLATIONERROR_FUNCTION (1 of 3 remaining) [2024-10-13 06:59:54,711 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thrErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 3 remaining) [2024-10-13 06:59:54,712 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-10-13 06:59:54,712 INFO L407 BasicCegarLoop]: Path program histogram: [1] [2024-10-13 06:59:54,715 WARN L239 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2024-10-13 06:59:54,716 INFO L484 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2024-10-13 06:59:54,735 INFO L143 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-10-13 06:59:54,737 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 32 places, 31 transitions, 72 flow [2024-10-13 06:59:54,753 INFO L124 PetriNetUnfolderBase]: 4/36 cut-off events. [2024-10-13 06:59:54,753 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-10-13 06:59:54,754 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44 conditions, 36 events. 4/36 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 59 event pairs, 0 based on Foata normal form. 0/27 useless extension candidates. Maximal degree in co-relation 27. Up to 3 conditions per place. [2024-10-13 06:59:54,754 INFO L82 GeneralOperation]: Start removeDead. Operand has 32 places, 31 transitions, 72 flow [2024-10-13 06:59:54,756 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 32 places, 31 transitions, 72 flow [2024-10-13 06:59:54,757 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-10-13 06:59:54,758 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;@32621587, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-10-13 06:59:54,758 INFO L334 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2024-10-13 06:59:54,763 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-10-13 06:59:54,764 INFO L124 PetriNetUnfolderBase]: 0/18 cut-off events. [2024-10-13 06:59:54,764 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-10-13 06:59:54,764 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-13 06:59:54,764 INFO L204 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1] [2024-10-13 06:59:54,764 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thrErr0ASSERT_VIOLATIONERROR_FUNCTION, thrErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2024-10-13 06:59:54,765 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 06:59:54,765 INFO L85 PathProgramCache]: Analyzing trace with hash 1573251801, now seen corresponding path program 1 times [2024-10-13 06:59:54,765 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 06:59:54,766 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1020523493] [2024-10-13 06:59:54,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 06:59:54,766 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 06:59:54,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-10-13 06:59:54,786 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2024-10-13 06:59:54,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-10-13 06:59:54,818 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2024-10-13 06:59:54,821 INFO L325 BasicCegarLoop]: Counterexample is feasible [2024-10-13 06:59:54,821 INFO L782 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (3 of 4 remaining) [2024-10-13 06:59:54,821 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thrErr0ASSERT_VIOLATIONERROR_FUNCTION (2 of 4 remaining) [2024-10-13 06:59:54,822 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thrErr0ASSERT_VIOLATIONERROR_FUNCTION (1 of 4 remaining) [2024-10-13 06:59:54,822 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thrErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 4 remaining) [2024-10-13 06:59:54,822 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-10-13 06:59:54,822 INFO L407 BasicCegarLoop]: Path program histogram: [1] [2024-10-13 06:59:54,823 WARN L239 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2024-10-13 06:59:54,824 INFO L484 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2024-10-13 06:59:54,848 INFO L143 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-10-13 06:59:54,850 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 45 places, 44 transitions, 106 flow [2024-10-13 06:59:54,860 INFO L124 PetriNetUnfolderBase]: 6/52 cut-off events. [2024-10-13 06:59:54,861 INFO L125 PetriNetUnfolderBase]: For 7/7 co-relation queries the response was YES. [2024-10-13 06:59:54,862 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65 conditions, 52 events. 6/52 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 107 event pairs, 0 based on Foata normal form. 0/39 useless extension candidates. Maximal degree in co-relation 43. Up to 4 conditions per place. [2024-10-13 06:59:54,862 INFO L82 GeneralOperation]: Start removeDead. Operand has 45 places, 44 transitions, 106 flow [2024-10-13 06:59:54,863 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 45 places, 44 transitions, 106 flow [2024-10-13 06:59:54,864 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-10-13 06:59:54,864 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;@32621587, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-10-13 06:59:54,865 INFO L334 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2024-10-13 06:59:54,871 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-10-13 06:59:54,872 INFO L124 PetriNetUnfolderBase]: 2/33 cut-off events. [2024-10-13 06:59:54,872 INFO L125 PetriNetUnfolderBase]: For 7/7 co-relation queries the response was YES. [2024-10-13 06:59:54,872 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-13 06:59:54,872 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 06:59:54,872 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting thrErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thrErr0ASSERT_VIOLATIONERROR_FUNCTION, thrErr0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-10-13 06:59:54,873 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 06:59:54,873 INFO L85 PathProgramCache]: Analyzing trace with hash -378456872, now seen corresponding path program 1 times [2024-10-13 06:59:54,873 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 06:59:54,873 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1550869458] [2024-10-13 06:59:54,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 06:59:54,874 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 06:59:54,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 06:59:55,177 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 06:59:55,177 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 06:59:55,177 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1550869458] [2024-10-13 06:59:55,178 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1550869458] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-13 06:59:55,178 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-13 06:59:55,178 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-10-13 06:59:55,178 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1078073527] [2024-10-13 06:59:55,179 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-13 06:59:55,197 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-10-13 06:59:55,205 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 06:59:55,231 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-10-13 06:59:55,232 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-10-13 06:59:55,237 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-10-13 06:59:55,240 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 44 transitions, 106 flow. Second operand has 6 states, 6 states have (on average 12.5) internal successors, (75), 6 states have internal predecessors, (75), 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) [2024-10-13 06:59:55,240 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-13 06:59:55,240 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-10-13 06:59:55,241 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-13 06:59:56,770 INFO L124 PetriNetUnfolderBase]: 8697/13361 cut-off events. [2024-10-13 06:59:56,771 INFO L125 PetriNetUnfolderBase]: For 715/715 co-relation queries the response was YES. [2024-10-13 06:59:56,809 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25692 conditions, 13361 events. 8697/13361 cut-off events. For 715/715 co-relation queries the response was YES. Maximal size of possible extension queue 609. Compared 85605 event pairs, 1822 based on Foata normal form. 963/11918 useless extension candidates. Maximal degree in co-relation 17521. Up to 6186 conditions per place. [2024-10-13 06:59:56,925 INFO L140 encePairwiseOnDemand]: 31/44 looper letters, 101 selfloop transitions, 12 changer transitions 0/124 dead transitions. [2024-10-13 06:59:56,930 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 124 transitions, 552 flow [2024-10-13 06:59:56,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-10-13 06:59:56,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-10-13 06:59:56,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 206 transitions. [2024-10-13 06:59:56,958 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6688311688311688 [2024-10-13 06:59:56,960 INFO L175 Difference]: Start difference. First operand has 45 places, 44 transitions, 106 flow. Second operand 7 states and 206 transitions. [2024-10-13 06:59:56,961 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 124 transitions, 552 flow [2024-10-13 06:59:56,969 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 124 transitions, 540 flow, removed 6 selfloop flow, removed 0 redundant places. [2024-10-13 06:59:56,979 INFO L231 Difference]: Finished difference. Result has 55 places, 50 transitions, 180 flow [2024-10-13 06:59:56,982 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=96, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=180, PETRI_PLACES=55, PETRI_TRANSITIONS=50} [2024-10-13 06:59:56,994 INFO L277 CegarLoopForPetriNet]: 45 programPoint places, 10 predicate places. [2024-10-13 06:59:56,996 INFO L471 AbstractCegarLoop]: Abstraction has has 55 places, 50 transitions, 180 flow [2024-10-13 06:59:56,996 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 12.5) internal successors, (75), 6 states have internal predecessors, (75), 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) [2024-10-13 06:59:56,996 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-13 06:59:56,996 INFO L204 CegarLoopForPetriNet]: trace histogram [4, 3, 1, 1, 1, 1, 1] [2024-10-13 06:59:56,997 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-10-13 06:59:56,997 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thrErr0ASSERT_VIOLATIONERROR_FUNCTION, thrErr0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-10-13 06:59:56,997 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 06:59:56,997 INFO L85 PathProgramCache]: Analyzing trace with hash 188253497, now seen corresponding path program 1 times [2024-10-13 06:59:56,997 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 06:59:56,997 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [89969580] [2024-10-13 06:59:56,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 06:59:56,998 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 06:59:57,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-10-13 06:59:57,041 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2024-10-13 06:59:57,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-10-13 06:59:57,068 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2024-10-13 06:59:57,071 INFO L325 BasicCegarLoop]: Counterexample is feasible [2024-10-13 06:59:57,071 INFO L782 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (4 of 5 remaining) [2024-10-13 06:59:57,072 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thrErr0ASSERT_VIOLATIONERROR_FUNCTION (3 of 5 remaining) [2024-10-13 06:59:57,072 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thrErr0ASSERT_VIOLATIONERROR_FUNCTION (2 of 5 remaining) [2024-10-13 06:59:57,072 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thrErr0ASSERT_VIOLATIONERROR_FUNCTION (1 of 5 remaining) [2024-10-13 06:59:57,072 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thrErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 5 remaining) [2024-10-13 06:59:57,074 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-10-13 06:59:57,074 INFO L407 BasicCegarLoop]: Path program histogram: [1, 1] [2024-10-13 06:59:57,075 WARN L239 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2024-10-13 06:59:57,075 INFO L484 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2024-10-13 06:59:57,111 INFO L143 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-10-13 06:59:57,117 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 58 places, 57 transitions, 142 flow [2024-10-13 06:59:57,126 INFO L124 PetriNetUnfolderBase]: 8/68 cut-off events. [2024-10-13 06:59:57,130 INFO L125 PetriNetUnfolderBase]: For 16/16 co-relation queries the response was YES. [2024-10-13 06:59:57,131 INFO L83 FinitePrefix]: Finished finitePrefix Result has 87 conditions, 68 events. 8/68 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 156 event pairs, 0 based on Foata normal form. 0/51 useless extension candidates. Maximal degree in co-relation 64. Up to 5 conditions per place. [2024-10-13 06:59:57,131 INFO L82 GeneralOperation]: Start removeDead. Operand has 58 places, 57 transitions, 142 flow [2024-10-13 06:59:57,132 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 58 places, 57 transitions, 142 flow [2024-10-13 06:59:57,133 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-10-13 06:59:57,137 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;@32621587, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-10-13 06:59:57,137 INFO L334 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2024-10-13 06:59:57,141 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-10-13 06:59:57,145 INFO L124 PetriNetUnfolderBase]: 2/33 cut-off events. [2024-10-13 06:59:57,145 INFO L125 PetriNetUnfolderBase]: For 10/10 co-relation queries the response was YES. [2024-10-13 06:59:57,145 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-13 06:59:57,145 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 06:59:57,146 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting thrErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thrErr0ASSERT_VIOLATIONERROR_FUNCTION, thrErr0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2024-10-13 06:59:57,146 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 06:59:57,146 INFO L85 PathProgramCache]: Analyzing trace with hash -1206810243, now seen corresponding path program 1 times [2024-10-13 06:59:57,146 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 06:59:57,147 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [637754800] [2024-10-13 06:59:57,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 06:59:57,147 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 06:59:57,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 06:59:57,441 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 06:59:57,442 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 06:59:57,442 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [637754800] [2024-10-13 06:59:57,442 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [637754800] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-13 06:59:57,442 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-13 06:59:57,442 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-10-13 06:59:57,442 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [886200367] [2024-10-13 06:59:57,443 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-13 06:59:57,443 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-10-13 06:59:57,443 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 06:59:57,447 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-10-13 06:59:57,448 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-10-13 06:59:57,452 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 57 [2024-10-13 06:59:57,453 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 57 transitions, 142 flow. Second operand has 6 states, 6 states have (on average 16.5) internal successors, (99), 6 states have internal predecessors, (99), 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) [2024-10-13 06:59:57,453 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-13 06:59:57,453 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 57 [2024-10-13 06:59:57,453 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-13 07:00:08,647 INFO L124 PetriNetUnfolderBase]: 98531/139216 cut-off events. [2024-10-13 07:00:08,648 INFO L125 PetriNetUnfolderBase]: For 9994/9994 co-relation queries the response was YES. [2024-10-13 07:00:08,936 INFO L83 FinitePrefix]: Finished finitePrefix Result has 268248 conditions, 139216 events. 98531/139216 cut-off events. For 9994/9994 co-relation queries the response was YES. Maximal size of possible extension queue 4537. Compared 1019682 event pairs, 23890 based on Foata normal form. 11088/124117 useless extension candidates. Maximal degree in co-relation 136311. Up to 65858 conditions per place. [2024-10-13 07:00:09,887 INFO L140 encePairwiseOnDemand]: 42/57 looper letters, 139 selfloop transitions, 14 changer transitions 0/168 dead transitions. [2024-10-13 07:00:09,888 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 168 transitions, 775 flow [2024-10-13 07:00:09,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-10-13 07:00:09,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-10-13 07:00:09,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 278 transitions. [2024-10-13 07:00:09,893 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6967418546365914 [2024-10-13 07:00:09,893 INFO L175 Difference]: Start difference. First operand has 58 places, 57 transitions, 142 flow. Second operand 7 states and 278 transitions. [2024-10-13 07:00:09,893 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 168 transitions, 775 flow [2024-10-13 07:00:09,904 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 168 transitions, 739 flow, removed 18 selfloop flow, removed 0 redundant places. [2024-10-13 07:00:09,905 INFO L231 Difference]: Finished difference. Result has 68 places, 64 transitions, 226 flow [2024-10-13 07:00:09,906 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=57, PETRI_DIFFERENCE_MINUEND_FLOW=126, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=52, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=226, PETRI_PLACES=68, PETRI_TRANSITIONS=64} [2024-10-13 07:00:09,907 INFO L277 CegarLoopForPetriNet]: 58 programPoint places, 10 predicate places. [2024-10-13 07:00:09,907 INFO L471 AbstractCegarLoop]: Abstraction has has 68 places, 64 transitions, 226 flow [2024-10-13 07:00:09,908 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.5) internal successors, (99), 6 states have internal predecessors, (99), 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) [2024-10-13 07:00:09,908 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-13 07:00:09,908 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 07:00:09,908 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-10-13 07:00:09,908 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting thrErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thrErr0ASSERT_VIOLATIONERROR_FUNCTION, thrErr0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2024-10-13 07:00:09,909 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 07:00:09,909 INFO L85 PathProgramCache]: Analyzing trace with hash 1632062273, now seen corresponding path program 1 times [2024-10-13 07:00:09,909 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 07:00:09,909 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [49930671] [2024-10-13 07:00:09,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 07:00:09,909 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 07:00:09,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 07:00:10,086 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-10-13 07:00:10,087 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 07:00:10,087 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [49930671] [2024-10-13 07:00:10,087 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [49930671] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-13 07:00:10,087 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-13 07:00:10,087 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-10-13 07:00:10,087 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [710113385] [2024-10-13 07:00:10,087 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-13 07:00:10,087 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-10-13 07:00:10,088 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 07:00:10,088 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-10-13 07:00:10,088 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-10-13 07:00:10,094 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 57 [2024-10-13 07:00:10,095 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 64 transitions, 226 flow. Second operand has 6 states, 6 states have (on average 16.833333333333332) internal successors, (101), 6 states have internal predecessors, (101), 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) [2024-10-13 07:00:10,095 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-13 07:00:10,095 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 57 [2024-10-13 07:00:10,095 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-13 07:00:24,807 INFO L124 PetriNetUnfolderBase]: 153451/218781 cut-off events. [2024-10-13 07:00:24,808 INFO L125 PetriNetUnfolderBase]: For 86609/88706 co-relation queries the response was YES. [2024-10-13 07:00:25,433 INFO L83 FinitePrefix]: Finished finitePrefix Result has 477648 conditions, 218781 events. 153451/218781 cut-off events. For 86609/88706 co-relation queries the response was YES. Maximal size of possible extension queue 7564. Compared 1724688 event pairs, 43744 based on Foata normal form. 0/187554 useless extension candidates. Maximal degree in co-relation 398346. Up to 112061 conditions per place. [2024-10-13 07:00:26,688 INFO L140 encePairwiseOnDemand]: 47/57 looper letters, 145 selfloop transitions, 19 changer transitions 0/180 dead transitions. [2024-10-13 07:00:26,690 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 180 transitions, 948 flow [2024-10-13 07:00:26,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-10-13 07:00:26,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-10-13 07:00:26,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 255 transitions. [2024-10-13 07:00:26,696 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6390977443609023 [2024-10-13 07:00:26,697 INFO L175 Difference]: Start difference. First operand has 68 places, 64 transitions, 226 flow. Second operand 7 states and 255 transitions. [2024-10-13 07:00:26,697 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 180 transitions, 948 flow [2024-10-13 07:00:26,990 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 180 transitions, 948 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-10-13 07:00:26,992 INFO L231 Difference]: Finished difference. Result has 78 places, 74 transitions, 346 flow [2024-10-13 07:00:26,992 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=57, PETRI_DIFFERENCE_MINUEND_FLOW=226, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=64, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=346, PETRI_PLACES=78, PETRI_TRANSITIONS=74} [2024-10-13 07:00:26,993 INFO L277 CegarLoopForPetriNet]: 58 programPoint places, 20 predicate places. [2024-10-13 07:00:26,993 INFO L471 AbstractCegarLoop]: Abstraction has has 78 places, 74 transitions, 346 flow [2024-10-13 07:00:26,993 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.833333333333332) internal successors, (101), 6 states have internal predecessors, (101), 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) [2024-10-13 07:00:26,994 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-13 07:00:26,994 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 07:00:26,994 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-10-13 07:00:26,995 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting thrErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thrErr0ASSERT_VIOLATIONERROR_FUNCTION, thrErr0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2024-10-13 07:00:26,995 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 07:00:26,995 INFO L85 PathProgramCache]: Analyzing trace with hash 1088629231, now seen corresponding path program 1 times [2024-10-13 07:00:26,995 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 07:00:26,995 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1645824565] [2024-10-13 07:00:26,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 07:00:26,996 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 07:00:27,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 07:00:27,139 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 07:00:27,140 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 07:00:27,141 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1645824565] [2024-10-13 07:00:27,141 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1645824565] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-13 07:00:27,142 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1289548181] [2024-10-13 07:00:27,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 07:00:27,143 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 07:00:27,143 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-13 07:00:27,144 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-13 07:00:27,150 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-10-13 07:00:27,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 07:00:27,220 INFO L255 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-10-13 07:00:27,221 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-13 07:00:27,514 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 07:00:27,515 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-13 07:00:27,718 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 07:00:27,719 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1289548181] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-13 07:00:27,719 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-13 07:00:27,719 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 8, 8] total 18 [2024-10-13 07:00:27,719 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [183261492] [2024-10-13 07:00:27,719 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-13 07:00:27,719 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-10-13 07:00:27,720 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 07:00:27,720 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-10-13 07:00:27,720 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=242, Unknown=0, NotChecked=0, Total=306 [2024-10-13 07:00:27,727 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 57 [2024-10-13 07:00:27,727 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 74 transitions, 346 flow. Second operand has 18 states, 18 states have (on average 16.77777777777778) internal successors, (302), 18 states have internal predecessors, (302), 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) [2024-10-13 07:00:27,728 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-13 07:00:27,728 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 57 [2024-10-13 07:00:27,728 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand