./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 84cfde4a Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/pthread-lit/sssc12.i -s /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash f04269da33313e0538e960083eba1e7b90d9e89847d2a89d06392d6991a3ed98 --- Real Ultimate output --- This is Ultimate 0.2.5-dev-84cfde4 [2024-10-11 14:20:06,100 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-10-11 14:20:06,160 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-10-11 14:20:06,165 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-10-11 14:20:06,165 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-10-11 14:20:06,190 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-10-11 14:20:06,191 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-10-11 14:20:06,192 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-10-11 14:20:06,192 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-10-11 14:20:06,193 INFO L153 SettingsManager]: * Use memory slicer=true [2024-10-11 14:20:06,194 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-10-11 14:20:06,194 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-10-11 14:20:06,195 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-10-11 14:20:06,195 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-10-11 14:20:06,196 INFO L153 SettingsManager]: * Use SBE=true [2024-10-11 14:20:06,197 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-10-11 14:20:06,197 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-10-11 14:20:06,197 INFO L153 SettingsManager]: * sizeof long=4 [2024-10-11 14:20:06,197 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-10-11 14:20:06,197 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-10-11 14:20:06,198 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-10-11 14:20:06,200 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-10-11 14:20:06,200 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-10-11 14:20:06,201 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-10-11 14:20:06,201 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-10-11 14:20:06,201 INFO L153 SettingsManager]: * sizeof long double=12 [2024-10-11 14:20:06,201 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-10-11 14:20:06,201 INFO L153 SettingsManager]: * Use constant arrays=true [2024-10-11 14:20:06,201 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-10-11 14:20:06,201 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-10-11 14:20:06,202 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-10-11 14:20:06,202 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-10-11 14:20:06,202 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-11 14:20:06,202 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-10-11 14:20:06,202 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-10-11 14:20:06,202 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-10-11 14:20:06,203 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-10-11 14:20:06,203 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-10-11 14:20:06,203 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-10-11 14:20:06,203 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-10-11 14:20:06,203 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-10-11 14:20:06,206 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-10-11 14:20:06,206 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> f04269da33313e0538e960083eba1e7b90d9e89847d2a89d06392d6991a3ed98 [2024-10-11 14:20:06,405 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-10-11 14:20:06,426 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-10-11 14:20:06,428 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-10-11 14:20:06,428 INFO L270 PluginConnector]: Initializing CDTParser... [2024-10-11 14:20:06,432 INFO L274 PluginConnector]: CDTParser initialized [2024-10-11 14:20:06,433 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/pthread-lit/sssc12.i [2024-10-11 14:20:07,641 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-10-11 14:20:07,844 INFO L384 CDTParser]: Found 1 translation units. [2024-10-11 14:20:07,845 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/pthread-lit/sssc12.i [2024-10-11 14:20:07,860 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/data/b9c3c19ed/ffebf209da8146f78729cfc6e2dcc0b3/FLAG80b489567 [2024-10-11 14:20:07,875 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/data/b9c3c19ed/ffebf209da8146f78729cfc6e2dcc0b3 [2024-10-11 14:20:07,877 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-10-11 14:20:07,879 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-10-11 14:20:07,881 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-10-11 14:20:07,881 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-10-11 14:20:07,885 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-10-11 14:20:07,886 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.10 02:20:07" (1/1) ... [2024-10-11 14:20:07,888 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@364afec6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:20:07, skipping insertion in model container [2024-10-11 14:20:07,888 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.10 02:20:07" (1/1) ... [2024-10-11 14:20:07,930 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-10-11 14:20:08,255 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] [2024-10-11 14:20:08,271 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-11 14:20:08,277 INFO L200 MainTranslator]: Completed pre-run [2024-10-11 14:20:08,316 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] [2024-10-11 14:20:08,320 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-11 14:20:08,394 INFO L204 MainTranslator]: Completed translation [2024-10-11 14:20:08,394 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:20:08 WrapperNode [2024-10-11 14:20:08,394 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-10-11 14:20:08,395 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-10-11 14:20:08,395 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-10-11 14:20:08,395 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-10-11 14:20:08,415 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:20:08" (1/1) ... [2024-10-11 14:20:08,431 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:20:08" (1/1) ... [2024-10-11 14:20:08,447 INFO L138 Inliner]: procedures = 274, calls = 19, calls flagged for inlining = 8, calls inlined = 8, statements flattened = 78 [2024-10-11 14:20:08,448 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-10-11 14:20:08,449 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-10-11 14:20:08,449 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-10-11 14:20:08,449 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-10-11 14:20:08,458 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:20:08" (1/1) ... [2024-10-11 14:20:08,458 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:20:08" (1/1) ... [2024-10-11 14:20:08,460 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:20:08" (1/1) ... [2024-10-11 14:20:08,478 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]. [2024-10-11 14:20:08,478 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:20:08" (1/1) ... [2024-10-11 14:20:08,478 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:20:08" (1/1) ... [2024-10-11 14:20:08,482 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:20:08" (1/1) ... [2024-10-11 14:20:08,484 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:20:08" (1/1) ... [2024-10-11 14:20:08,486 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:20:08" (1/1) ... [2024-10-11 14:20:08,486 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:20:08" (1/1) ... [2024-10-11 14:20:08,488 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-10-11 14:20:08,489 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-10-11 14:20:08,489 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-10-11 14:20:08,489 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-10-11 14:20:08,490 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:20:08" (1/1) ... [2024-10-11 14:20:08,500 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-11 14:20:08,508 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 14:20:08,521 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-10-11 14:20:08,523 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-10-11 14:20:08,563 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-10-11 14:20:08,563 INFO L130 BoogieDeclarations]: Found specification of procedure thr [2024-10-11 14:20:08,563 INFO L138 BoogieDeclarations]: Found implementation of procedure thr [2024-10-11 14:20:08,563 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-10-11 14:20:08,563 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-10-11 14:20:08,564 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-10-11 14:20:08,564 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-10-11 14:20:08,565 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-10-11 14:20:08,565 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-10-11 14:20:08,565 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-10-11 14:20:08,565 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-10-11 14:20:08,565 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-10-11 14:20:08,566 WARN L207 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2024-10-11 14:20:08,676 INFO L238 CfgBuilder]: Building ICFG [2024-10-11 14:20:08,678 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-10-11 14:20:08,810 INFO L283 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-10-11 14:20:08,810 INFO L287 CfgBuilder]: Performing block encoding [2024-10-11 14:20:08,927 INFO L309 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-10-11 14:20:08,927 INFO L314 CfgBuilder]: Removed 2 assume(true) statements. [2024-10-11 14:20:08,928 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.10 02:20:08 BoogieIcfgContainer [2024-10-11 14:20:08,928 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-10-11 14:20:08,929 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-10-11 14:20:08,930 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-10-11 14:20:08,933 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-10-11 14:20:08,934 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 11.10 02:20:07" (1/3) ... [2024-10-11 14:20:08,934 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4bee2905 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.10 02:20:08, skipping insertion in model container [2024-10-11 14:20:08,934 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:20:08" (2/3) ... [2024-10-11 14:20:08,935 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4bee2905 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.10 02:20:08, skipping insertion in model container [2024-10-11 14:20:08,935 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.10 02:20:08" (3/3) ... [2024-10-11 14:20:08,936 INFO L112 eAbstractionObserver]: Analyzing ICFG sssc12.i [2024-10-11 14:20:08,947 INFO L209 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-10-11 14:20:08,947 INFO L149 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-10-11 14:20:08,947 INFO L484 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-10-11 14:20:08,971 INFO L143 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-10-11 14:20:08,994 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 19 places, 18 transitions, 40 flow [2024-10-11 14:20:09,008 INFO L124 PetriNetUnfolderBase]: 2/20 cut-off events. [2024-10-11 14:20:09,008 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-10-11 14:20:09,012 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. [2024-10-11 14:20:09,012 INFO L82 GeneralOperation]: Start removeDead. Operand has 19 places, 18 transitions, 40 flow [2024-10-11 14:20:09,014 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 19 places, 18 transitions, 40 flow [2024-10-11 14:20:09,022 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-10-11 14:20:09,027 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;@4e9357ae, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-10-11 14:20:09,027 INFO L334 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2024-10-11 14:20:09,033 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-10-11 14:20:09,033 INFO L124 PetriNetUnfolderBase]: 0/9 cut-off events. [2024-10-11 14:20:09,033 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-10-11 14:20:09,033 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 14:20:09,033 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2024-10-11 14:20:09,034 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thrErr0ASSERT_VIOLATIONERROR_FUNCTION, thrErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-11 14:20:09,038 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 14:20:09,038 INFO L85 PathProgramCache]: Analyzing trace with hash -1343125734, now seen corresponding path program 1 times [2024-10-11 14:20:09,045 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 14:20:09,045 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [579153454] [2024-10-11 14:20:09,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 14:20:09,045 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 14:20:09,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-10-11 14:20:09,143 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2024-10-11 14:20:09,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-10-11 14:20:09,176 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2024-10-11 14:20:09,178 INFO L325 BasicCegarLoop]: Counterexample is feasible [2024-10-11 14:20:09,179 INFO L782 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 3 remaining) [2024-10-11 14:20:09,180 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thrErr0ASSERT_VIOLATIONERROR_FUNCTION (1 of 3 remaining) [2024-10-11 14:20:09,181 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thrErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 3 remaining) [2024-10-11 14:20:09,181 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-10-11 14:20:09,181 INFO L407 BasicCegarLoop]: Path program histogram: [1] [2024-10-11 14:20:09,185 WARN L239 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2024-10-11 14:20:09,185 INFO L484 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2024-10-11 14:20:09,206 INFO L143 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-10-11 14:20:09,208 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 32 places, 31 transitions, 72 flow [2024-10-11 14:20:09,216 INFO L124 PetriNetUnfolderBase]: 4/36 cut-off events. [2024-10-11 14:20:09,217 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-10-11 14:20:09,218 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. [2024-10-11 14:20:09,219 INFO L82 GeneralOperation]: Start removeDead. Operand has 32 places, 31 transitions, 72 flow [2024-10-11 14:20:09,220 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 32 places, 31 transitions, 72 flow [2024-10-11 14:20:09,221 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-10-11 14:20:09,222 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;@4e9357ae, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-10-11 14:20:09,222 INFO L334 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2024-10-11 14:20:09,226 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-10-11 14:20:09,227 INFO L124 PetriNetUnfolderBase]: 0/18 cut-off events. [2024-10-11 14:20:09,227 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-10-11 14:20:09,227 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 14:20:09,227 INFO L204 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1] [2024-10-11 14:20:09,227 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)] === [2024-10-11 14:20:09,228 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 14:20:09,228 INFO L85 PathProgramCache]: Analyzing trace with hash 1573251801, now seen corresponding path program 1 times [2024-10-11 14:20:09,228 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 14:20:09,228 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [702821111] [2024-10-11 14:20:09,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 14:20:09,228 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 14:20:09,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-10-11 14:20:09,249 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2024-10-11 14:20:09,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-10-11 14:20:09,266 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2024-10-11 14:20:09,266 INFO L325 BasicCegarLoop]: Counterexample is feasible [2024-10-11 14:20:09,266 INFO L782 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (3 of 4 remaining) [2024-10-11 14:20:09,267 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thrErr0ASSERT_VIOLATIONERROR_FUNCTION (2 of 4 remaining) [2024-10-11 14:20:09,267 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thrErr0ASSERT_VIOLATIONERROR_FUNCTION (1 of 4 remaining) [2024-10-11 14:20:09,267 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thrErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 4 remaining) [2024-10-11 14:20:09,267 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-10-11 14:20:09,267 INFO L407 BasicCegarLoop]: Path program histogram: [1] [2024-10-11 14:20:09,268 WARN L239 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2024-10-11 14:20:09,268 INFO L484 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2024-10-11 14:20:09,284 INFO L143 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-10-11 14:20:09,286 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 45 places, 44 transitions, 106 flow [2024-10-11 14:20:09,314 INFO L124 PetriNetUnfolderBase]: 6/52 cut-off events. [2024-10-11 14:20:09,314 INFO L125 PetriNetUnfolderBase]: For 7/7 co-relation queries the response was YES. [2024-10-11 14:20:09,314 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. [2024-10-11 14:20:09,314 INFO L82 GeneralOperation]: Start removeDead. Operand has 45 places, 44 transitions, 106 flow [2024-10-11 14:20:09,315 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 45 places, 44 transitions, 106 flow [2024-10-11 14:20:09,317 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-10-11 14:20:09,318 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;@4e9357ae, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-10-11 14:20:09,319 INFO L334 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2024-10-11 14:20:09,327 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-10-11 14:20:09,328 INFO L124 PetriNetUnfolderBase]: 2/33 cut-off events. [2024-10-11 14:20:09,328 INFO L125 PetriNetUnfolderBase]: For 7/7 co-relation queries the response was YES. [2024-10-11 14:20:09,328 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 14:20:09,328 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 14:20:09,329 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting thrErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thrErr0ASSERT_VIOLATIONERROR_FUNCTION, thrErr0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-10-11 14:20:09,329 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 14:20:09,329 INFO L85 PathProgramCache]: Analyzing trace with hash -378456872, now seen corresponding path program 1 times [2024-10-11 14:20:09,329 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 14:20:09,329 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [669684972] [2024-10-11 14:20:09,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 14:20:09,330 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 14:20:09,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 14:20:09,625 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 14:20:09,626 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 14:20:09,626 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [669684972] [2024-10-11 14:20:09,629 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [669684972] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-11 14:20:09,629 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-11 14:20:09,629 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-10-11 14:20:09,630 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1008490911] [2024-10-11 14:20:09,630 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-11 14:20:09,638 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-10-11 14:20:09,642 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 14:20:09,663 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-10-11 14:20:09,663 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-10-11 14:20:09,670 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-10-11 14:20:09,673 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) [2024-10-11 14:20:09,673 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 14:20:09,673 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-10-11 14:20:09,674 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 14:20:10,833 INFO L124 PetriNetUnfolderBase]: 8697/13361 cut-off events. [2024-10-11 14:20:10,834 INFO L125 PetriNetUnfolderBase]: For 715/715 co-relation queries the response was YES. [2024-10-11 14:20:10,853 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. [2024-10-11 14:20:10,915 INFO L140 encePairwiseOnDemand]: 31/44 looper letters, 101 selfloop transitions, 12 changer transitions 0/124 dead transitions. [2024-10-11 14:20:10,916 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 124 transitions, 552 flow [2024-10-11 14:20:10,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-10-11 14:20:10,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-10-11 14:20:10,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 206 transitions. [2024-10-11 14:20:10,928 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6688311688311688 [2024-10-11 14:20:10,930 INFO L175 Difference]: Start difference. First operand has 45 places, 44 transitions, 106 flow. Second operand 7 states and 206 transitions. [2024-10-11 14:20:10,930 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 124 transitions, 552 flow [2024-10-11 14:20:10,934 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 124 transitions, 540 flow, removed 6 selfloop flow, removed 0 redundant places. [2024-10-11 14:20:10,940 INFO L231 Difference]: Finished difference. Result has 55 places, 50 transitions, 180 flow [2024-10-11 14:20:10,943 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} [2024-10-11 14:20:10,947 INFO L277 CegarLoopForPetriNet]: 45 programPoint places, 10 predicate places. [2024-10-11 14:20:10,947 INFO L471 AbstractCegarLoop]: Abstraction has has 55 places, 50 transitions, 180 flow [2024-10-11 14:20:10,948 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) [2024-10-11 14:20:10,948 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 14:20:10,949 INFO L204 CegarLoopForPetriNet]: trace histogram [4, 3, 1, 1, 1, 1, 1] [2024-10-11 14:20:10,949 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-10-11 14:20:10,949 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)] === [2024-10-11 14:20:10,950 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 14:20:10,950 INFO L85 PathProgramCache]: Analyzing trace with hash 188253497, now seen corresponding path program 1 times [2024-10-11 14:20:10,950 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 14:20:10,950 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [281535120] [2024-10-11 14:20:10,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 14:20:10,951 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 14:20:10,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-10-11 14:20:10,975 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2024-10-11 14:20:10,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-10-11 14:20:10,992 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2024-10-11 14:20:10,993 INFO L325 BasicCegarLoop]: Counterexample is feasible [2024-10-11 14:20:10,993 INFO L782 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (4 of 5 remaining) [2024-10-11 14:20:10,993 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thrErr0ASSERT_VIOLATIONERROR_FUNCTION (3 of 5 remaining) [2024-10-11 14:20:10,994 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thrErr0ASSERT_VIOLATIONERROR_FUNCTION (2 of 5 remaining) [2024-10-11 14:20:10,994 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thrErr0ASSERT_VIOLATIONERROR_FUNCTION (1 of 5 remaining) [2024-10-11 14:20:10,994 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thrErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 5 remaining) [2024-10-11 14:20:10,995 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-10-11 14:20:10,995 INFO L407 BasicCegarLoop]: Path program histogram: [1, 1] [2024-10-11 14:20:10,995 WARN L239 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2024-10-11 14:20:10,996 INFO L484 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2024-10-11 14:20:11,023 INFO L143 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-10-11 14:20:11,026 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 58 places, 57 transitions, 142 flow [2024-10-11 14:20:11,033 INFO L124 PetriNetUnfolderBase]: 8/68 cut-off events. [2024-10-11 14:20:11,033 INFO L125 PetriNetUnfolderBase]: For 16/16 co-relation queries the response was YES. [2024-10-11 14:20:11,033 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. [2024-10-11 14:20:11,034 INFO L82 GeneralOperation]: Start removeDead. Operand has 58 places, 57 transitions, 142 flow [2024-10-11 14:20:11,034 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 58 places, 57 transitions, 142 flow [2024-10-11 14:20:11,035 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-10-11 14:20:11,038 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;@4e9357ae, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-10-11 14:20:11,038 INFO L334 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2024-10-11 14:20:11,044 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-10-11 14:20:11,044 INFO L124 PetriNetUnfolderBase]: 2/33 cut-off events. [2024-10-11 14:20:11,044 INFO L125 PetriNetUnfolderBase]: For 10/10 co-relation queries the response was YES. [2024-10-11 14:20:11,044 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 14:20:11,045 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 14:20:11,045 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting thrErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thrErr0ASSERT_VIOLATIONERROR_FUNCTION, thrErr0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2024-10-11 14:20:11,045 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 14:20:11,045 INFO L85 PathProgramCache]: Analyzing trace with hash -1206810243, now seen corresponding path program 1 times [2024-10-11 14:20:11,045 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 14:20:11,046 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [7027460] [2024-10-11 14:20:11,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 14:20:11,046 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 14:20:11,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 14:20:11,202 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 14:20:11,202 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 14:20:11,203 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [7027460] [2024-10-11 14:20:11,203 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [7027460] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-11 14:20:11,203 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-11 14:20:11,203 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-10-11 14:20:11,203 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [121774785] [2024-10-11 14:20:11,203 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-11 14:20:11,203 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-10-11 14:20:11,203 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 14:20:11,204 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-10-11 14:20:11,204 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-10-11 14:20:11,209 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 57 [2024-10-11 14:20:11,209 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) [2024-10-11 14:20:11,210 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 14:20:11,210 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 57 [2024-10-11 14:20:11,210 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 14:20:18,417 INFO L124 PetriNetUnfolderBase]: 98531/139216 cut-off events. [2024-10-11 14:20:18,417 INFO L125 PetriNetUnfolderBase]: For 9994/9994 co-relation queries the response was YES. [2024-10-11 14:20:18,704 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. [2024-10-11 14:20:19,316 INFO L140 encePairwiseOnDemand]: 42/57 looper letters, 139 selfloop transitions, 14 changer transitions 0/168 dead transitions. [2024-10-11 14:20:19,316 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 168 transitions, 775 flow [2024-10-11 14:20:19,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-10-11 14:20:19,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-10-11 14:20:19,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 278 transitions. [2024-10-11 14:20:19,318 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6967418546365914 [2024-10-11 14:20:19,318 INFO L175 Difference]: Start difference. First operand has 58 places, 57 transitions, 142 flow. Second operand 7 states and 278 transitions. [2024-10-11 14:20:19,319 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 168 transitions, 775 flow [2024-10-11 14:20:19,329 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 168 transitions, 739 flow, removed 18 selfloop flow, removed 0 redundant places. [2024-10-11 14:20:19,331 INFO L231 Difference]: Finished difference. Result has 68 places, 64 transitions, 226 flow [2024-10-11 14:20:19,331 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} [2024-10-11 14:20:19,332 INFO L277 CegarLoopForPetriNet]: 58 programPoint places, 10 predicate places. [2024-10-11 14:20:19,332 INFO L471 AbstractCegarLoop]: Abstraction has has 68 places, 64 transitions, 226 flow [2024-10-11 14:20:19,333 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) [2024-10-11 14:20:19,333 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 14:20:19,333 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 14:20:19,333 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-10-11 14:20:19,333 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting thrErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thrErr0ASSERT_VIOLATIONERROR_FUNCTION, thrErr0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2024-10-11 14:20:19,334 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 14:20:19,334 INFO L85 PathProgramCache]: Analyzing trace with hash 1632062273, now seen corresponding path program 1 times [2024-10-11 14:20:19,334 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 14:20:19,334 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [776420562] [2024-10-11 14:20:19,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 14:20:19,334 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 14:20:19,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 14:20:19,491 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-10-11 14:20:19,492 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 14:20:19,492 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [776420562] [2024-10-11 14:20:19,492 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [776420562] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-11 14:20:19,492 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-11 14:20:19,492 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-10-11 14:20:19,492 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1612215840] [2024-10-11 14:20:19,492 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-11 14:20:19,492 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-10-11 14:20:19,493 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 14:20:19,493 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-10-11 14:20:19,493 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-10-11 14:20:19,499 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 57 [2024-10-11 14:20:19,499 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) [2024-10-11 14:20:19,499 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 14:20:19,500 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 57 [2024-10-11 14:20:19,500 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 14:20:31,984 INFO L124 PetriNetUnfolderBase]: 153451/218781 cut-off events. [2024-10-11 14:20:31,984 INFO L125 PetriNetUnfolderBase]: For 86609/88706 co-relation queries the response was YES. [2024-10-11 14:20:32,670 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. [2024-10-11 14:20:33,477 INFO L140 encePairwiseOnDemand]: 47/57 looper letters, 145 selfloop transitions, 19 changer transitions 0/180 dead transitions. [2024-10-11 14:20:33,478 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 180 transitions, 948 flow [2024-10-11 14:20:33,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-10-11 14:20:33,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-10-11 14:20:33,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 255 transitions. [2024-10-11 14:20:33,481 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6390977443609023 [2024-10-11 14:20:33,481 INFO L175 Difference]: Start difference. First operand has 68 places, 64 transitions, 226 flow. Second operand 7 states and 255 transitions. [2024-10-11 14:20:33,481 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 180 transitions, 948 flow [2024-10-11 14:20:33,809 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 180 transitions, 948 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-10-11 14:20:33,811 INFO L231 Difference]: Finished difference. Result has 78 places, 74 transitions, 346 flow [2024-10-11 14:20:33,811 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} [2024-10-11 14:20:33,812 INFO L277 CegarLoopForPetriNet]: 58 programPoint places, 20 predicate places. [2024-10-11 14:20:33,812 INFO L471 AbstractCegarLoop]: Abstraction has has 78 places, 74 transitions, 346 flow [2024-10-11 14:20:33,812 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) [2024-10-11 14:20:33,812 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 14:20:33,813 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 14:20:33,813 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-10-11 14:20:33,813 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting thrErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thrErr0ASSERT_VIOLATIONERROR_FUNCTION, thrErr0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2024-10-11 14:20:33,813 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 14:20:33,813 INFO L85 PathProgramCache]: Analyzing trace with hash 1088629231, now seen corresponding path program 1 times [2024-10-11 14:20:33,813 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 14:20:33,813 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [539322599] [2024-10-11 14:20:33,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 14:20:33,814 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 14:20:33,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 14:20:34,131 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 14:20:34,132 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 14:20:34,132 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [539322599] [2024-10-11 14:20:34,132 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [539322599] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 14:20:34,132 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [479383813] [2024-10-11 14:20:34,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 14:20:34,133 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 14:20:34,133 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 14:20:34,134 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-11 14:20:34,135 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-10-11 14:20:34,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 14:20:34,196 INFO L255 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-10-11 14:20:34,198 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 14:20:34,501 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 14:20:34,502 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 14:20:34,686 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 14:20:34,687 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [479383813] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-11 14:20:34,687 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-11 14:20:34,687 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 8, 8] total 18 [2024-10-11 14:20:34,687 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1146533031] [2024-10-11 14:20:34,687 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-11 14:20:34,687 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-10-11 14:20:34,688 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 14:20:34,688 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-10-11 14:20:34,689 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=242, Unknown=0, NotChecked=0, Total=306 [2024-10-11 14:20:34,695 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 57 [2024-10-11 14:20:34,695 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) [2024-10-11 14:20:34,695 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 14:20:34,695 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 57 [2024-10-11 14:20:34,695 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand