./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-wmm/safe027_pso.oepc_pso.opt_tso.oepc_tso.opt.i --full-output --witness-type correctness_witness --witnessparser.only.consider.loop.invariants false --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --validate ./goblint.2024-06-19_11-23-25.files/mutex-meet-nonrel/safe027_pso.oepc_pso.opt_tso.oepc_tso.opt.yml/witness.yml --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version eb4cb34f 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/AutomizerReachWitnessValidation.xml -i ../../../trunk/examples/svcomp/pthread-wmm/safe027_pso.oepc_pso.opt_tso.oepc_tso.opt.i ./goblint.2024-06-19_11-23-25.files/mutex-meet-nonrel/safe027_pso.oepc_pso.opt_tso.oepc_tso.opt.yml/witness.yml -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --traceabstraction.compute.hoare.annotation.of.negated.interpolant.automaton,.abstraction.and.cfg false --witnessparser.only.consider.loop.invariants false --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --- Real Ultimate output --- This is Ultimate 0.2.4-tmp.fs.goblint-validation-eb4cb34-m [2024-06-21 20:16:51,909 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-21 20:16:51,983 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-21 20:16:51,989 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-21 20:16:51,989 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-21 20:16:52,013 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-21 20:16:52,014 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-21 20:16:52,014 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-21 20:16:52,014 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-21 20:16:52,018 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-21 20:16:52,018 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-21 20:16:52,018 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-21 20:16:52,019 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-21 20:16:52,020 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-21 20:16:52,020 INFO L153 SettingsManager]: * Use SBE=true [2024-06-21 20:16:52,021 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-21 20:16:52,021 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-21 20:16:52,021 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-21 20:16:52,021 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-21 20:16:52,021 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-21 20:16:52,022 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-21 20:16:52,022 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-21 20:16:52,022 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-21 20:16:52,022 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-21 20:16:52,023 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-21 20:16:52,023 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-21 20:16:52,023 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-21 20:16:52,023 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-21 20:16:52,024 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-21 20:16:52,024 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-21 20:16:52,025 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-21 20:16:52,025 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-21 20:16:52,025 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-21 20:16:52,025 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-21 20:16:52,026 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-21 20:16:52,026 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-21 20:16:52,026 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-21 20:16:52,026 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-21 20:16:52,026 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-21 20:16:52,027 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-21 20:16:52,027 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-21 20:16:52,027 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-21 20:16:52,027 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-21 20:16:52,027 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false [2024-06-21 20:16:52,252 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-21 20:16:52,273 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-21 20:16:52,275 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-21 20:16:52,276 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-06-21 20:16:52,276 INFO L274 PluginConnector]: Witness Parser initialized [2024-06-21 20:16:52,277 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-06-19_11-23-25.files/mutex-meet-nonrel/safe027_pso.oepc_pso.opt_tso.oepc_tso.opt.yml/witness.yml [2024-06-21 20:16:52,444 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-21 20:16:52,444 INFO L274 PluginConnector]: CDTParser initialized [2024-06-21 20:16:52,445 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/safe027_pso.oepc_pso.opt_tso.oepc_tso.opt.i [2024-06-21 20:16:53,516 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-21 20:16:53,729 INFO L384 CDTParser]: Found 1 translation units. [2024-06-21 20:16:53,729 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/safe027_pso.oepc_pso.opt_tso.oepc_tso.opt.i [2024-06-21 20:16:53,741 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/61a89e8b0/7e978d19529b44c192beffff07d67bf9/FLAGa1080daa3 [2024-06-21 20:16:53,752 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/61a89e8b0/7e978d19529b44c192beffff07d67bf9 [2024-06-21 20:16:53,752 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-21 20:16:53,753 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-06-21 20:16:53,754 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-21 20:16:53,755 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-21 20:16:53,758 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-21 20:16:53,759 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 21.06 08:16:52" (1/2) ... [2024-06-21 20:16:53,760 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5ae16739 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 08:16:53, skipping insertion in model container [2024-06-21 20:16:53,760 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 21.06 08:16:52" (1/2) ... [2024-06-21 20:16:53,761 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@18728036 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 08:16:53, skipping insertion in model container [2024-06-21 20:16:53,761 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.06 08:16:53" (2/2) ... [2024-06-21 20:16:53,761 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5ae16739 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 08:16:53, skipping insertion in model container [2024-06-21 20:16:53,762 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.06 08:16:53" (2/2) ... [2024-06-21 20:16:53,762 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-06-21 20:16:53,808 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-06-21 20:16:53,809 INFO L97 edCorrectnessWitness]: Location invariant before [L798-L798] (((((((! multithreaded || (__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1)) && (! multithreaded || (x == 0 || x == 1))) && (! multithreaded || (__unbuffered_p0_EBX == 0 || __unbuffered_p0_EBX == 1))) && (! multithreaded || (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1))) && (! multithreaded || (y == 0 || y == 1))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1))) && (! multithreaded || ((((((0 <= __unbuffered_cnt && (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1)) && (__unbuffered_p0_EBX == 0 || __unbuffered_p0_EBX == 1)) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)) && (__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1)) && (x == 0 || x == 1)) && (y == 0 || y == 1))) [2024-06-21 20:16:53,809 INFO L97 edCorrectnessWitness]: Location invariant before [L793-L793] (((((((! multithreaded || (__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1)) && (! multithreaded || (x == 0 || x == 1))) && (! multithreaded || (__unbuffered_p0_EBX == 0 || __unbuffered_p0_EBX == 1))) && (! multithreaded || (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1))) && (! multithreaded || (y == 0 || y == 1))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1))) && (! multithreaded || ((((((0 <= __unbuffered_cnt && (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1)) && (__unbuffered_p0_EBX == 0 || __unbuffered_p0_EBX == 1)) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)) && (__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1)) && (x == 0 || x == 1)) && (y == 0 || y == 1))) [2024-06-21 20:16:53,809 INFO L97 edCorrectnessWitness]: Location invariant before [L797-L797] (((((((! multithreaded || (__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1)) && (! multithreaded || (x == 0 || x == 1))) && (! multithreaded || (__unbuffered_p0_EBX == 0 || __unbuffered_p0_EBX == 1))) && (! multithreaded || (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1))) && (! multithreaded || (y == 0 || y == 1))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1))) && (! multithreaded || ((((((0 <= __unbuffered_cnt && (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1)) && (__unbuffered_p0_EBX == 0 || __unbuffered_p0_EBX == 1)) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)) && (__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1)) && (x == 0 || x == 1)) && (y == 0 || y == 1))) [2024-06-21 20:16:53,809 INFO L97 edCorrectnessWitness]: Location invariant before [L795-L795] (((((((! multithreaded || (__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1)) && (! multithreaded || (x == 0 || x == 1))) && (! multithreaded || (__unbuffered_p0_EBX == 0 || __unbuffered_p0_EBX == 1))) && (! multithreaded || (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1))) && (! multithreaded || (y == 0 || y == 1))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1))) && (! multithreaded || ((((((0 <= __unbuffered_cnt && (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1)) && (__unbuffered_p0_EBX == 0 || __unbuffered_p0_EBX == 1)) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)) && (__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1)) && (x == 0 || x == 1)) && (y == 0 || y == 1))) [2024-06-21 20:16:53,809 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-06-21 20:16:53,810 INFO L106 edCorrectnessWitness]: ghost_update [L791-L791] multithreaded = 1; [2024-06-21 20:16:53,904 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-21 20:16:54,188 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-21 20:16:54,196 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-06-21 20:16:54,283 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-21 20:16:54,313 INFO L206 MainTranslator]: Completed translation [2024-06-21 20:16:54,313 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 08:16:54 WrapperNode [2024-06-21 20:16:54,313 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-21 20:16:54,314 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-21 20:16:54,314 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-21 20:16:54,314 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-21 20:16:54,320 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 08:16:54" (1/1) ... [2024-06-21 20:16:54,330 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 08:16:54" (1/1) ... [2024-06-21 20:16:54,351 INFO L138 Inliner]: procedures = 176, calls = 47, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 75 [2024-06-21 20:16:54,351 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-21 20:16:54,352 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-21 20:16:54,352 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-21 20:16:54,352 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-21 20:16:54,360 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 08:16:54" (1/1) ... [2024-06-21 20:16:54,360 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 08:16:54" (1/1) ... [2024-06-21 20:16:54,363 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 08:16:54" (1/1) ... [2024-06-21 20:16:54,391 INFO L175 MemorySlicer]: Split 2 memory accesses to 1 slices as follows [2]. 100 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2]. The 0 writes are split as follows [0]. [2024-06-21 20:16:54,392 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 08:16:54" (1/1) ... [2024-06-21 20:16:54,392 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 08:16:54" (1/1) ... [2024-06-21 20:16:54,397 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 08:16:54" (1/1) ... [2024-06-21 20:16:54,398 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 08:16:54" (1/1) ... [2024-06-21 20:16:54,399 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 08:16:54" (1/1) ... [2024-06-21 20:16:54,400 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 08:16:54" (1/1) ... [2024-06-21 20:16:54,407 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-21 20:16:54,408 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-21 20:16:54,408 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-21 20:16:54,408 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-21 20:16:54,409 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 08:16:54" (1/1) ... [2024-06-21 20:16:54,425 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-21 20:16:54,430 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-21 20:16:54,441 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-06-21 20:16:54,443 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-06-21 20:16:54,472 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-06-21 20:16:54,472 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-21 20:16:54,473 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2024-06-21 20:16:54,473 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2024-06-21 20:16:54,473 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2024-06-21 20:16:54,473 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2024-06-21 20:16:54,473 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2024-06-21 20:16:54,473 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2024-06-21 20:16:54,473 INFO L130 BoogieDeclarations]: Found specification of procedure P3 [2024-06-21 20:16:54,473 INFO L138 BoogieDeclarations]: Found implementation of procedure P3 [2024-06-21 20:16:54,474 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-21 20:16:54,474 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-06-21 20:16:54,474 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-21 20:16:54,474 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-21 20:16:54,475 WARN L214 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2024-06-21 20:16:54,566 INFO L244 CfgBuilder]: Building ICFG [2024-06-21 20:16:54,568 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-21 20:16:54,765 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-21 20:16:54,765 INFO L293 CfgBuilder]: Performing block encoding [2024-06-21 20:16:54,874 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-21 20:16:54,879 INFO L320 CfgBuilder]: Removed 0 assume(true) statements. [2024-06-21 20:16:54,880 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.06 08:16:54 BoogieIcfgContainer [2024-06-21 20:16:54,882 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-21 20:16:54,883 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-21 20:16:54,884 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-21 20:16:54,887 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-21 20:16:54,887 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 21.06 08:16:52" (1/4) ... [2024-06-21 20:16:54,888 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6f3f17f4 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 21.06 08:16:54, skipping insertion in model container [2024-06-21 20:16:54,888 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.06 08:16:53" (2/4) ... [2024-06-21 20:16:54,888 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6f3f17f4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.06 08:16:54, skipping insertion in model container [2024-06-21 20:16:54,888 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 08:16:54" (3/4) ... [2024-06-21 20:16:54,893 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6f3f17f4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.06 08:16:54, skipping insertion in model container [2024-06-21 20:16:54,893 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.06 08:16:54" (4/4) ... [2024-06-21 20:16:54,894 INFO L112 eAbstractionObserver]: Analyzing ICFG safe027_pso.oepc_pso.opt_tso.oepc_tso.opt.i [2024-06-21 20:16:54,910 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-21 20:16:54,911 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 4 error locations. [2024-06-21 20:16:54,911 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-21 20:16:54,971 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-06-21 20:16:55,006 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 62 places, 49 transitions, 114 flow [2024-06-21 20:16:55,060 INFO L124 PetriNetUnfolderBase]: 0/45 cut-off events. [2024-06-21 20:16:55,061 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-21 20:16:55,062 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58 conditions, 45 events. 0/45 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 81 event pairs, 0 based on Foata normal form. 0/41 useless extension candidates. Maximal degree in co-relation 0. Up to 1 conditions per place. [2024-06-21 20:16:55,063 INFO L82 GeneralOperation]: Start removeDead. Operand has 62 places, 49 transitions, 114 flow [2024-06-21 20:16:55,069 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 52 places, 39 transitions, 90 flow [2024-06-21 20:16:55,082 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-21 20:16:55,088 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, 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;@451120a3, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-21 20:16:55,088 INFO L358 AbstractCegarLoop]: Starting to check reachability of 8 error locations. [2024-06-21 20:16:55,093 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-21 20:16:55,093 INFO L124 PetriNetUnfolderBase]: 0/5 cut-off events. [2024-06-21 20:16:55,093 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-21 20:16:55,093 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:16:55,094 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2024-06-21 20:16:55,095 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 20:16:55,098 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:16:55,099 INFO L85 PathProgramCache]: Analyzing trace with hash 233368746, now seen corresponding path program 1 times [2024-06-21 20:16:55,106 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:16:55,107 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1801605212] [2024-06-21 20:16:55,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:16:55,107 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:16:55,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:16:55,515 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:16:55,516 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:16:55,516 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1801605212] [2024-06-21 20:16:55,516 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1801605212] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:16:55,517 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:16:55,517 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-06-21 20:16:55,518 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [774611305] [2024-06-21 20:16:55,518 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:16:55,525 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-21 20:16:55,529 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:16:55,551 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-21 20:16:55,552 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-21 20:16:55,590 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 21 out of 49 [2024-06-21 20:16:55,593 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 39 transitions, 90 flow. Second operand has 3 states, 3 states have (on average 22.333333333333332) internal successors, (67), 3 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:16:55,593 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:16:55,593 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 21 of 49 [2024-06-21 20:16:55,594 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:16:55,892 INFO L124 PetriNetUnfolderBase]: 1447/2145 cut-off events. [2024-06-21 20:16:55,892 INFO L125 PetriNetUnfolderBase]: For 49/49 co-relation queries the response was YES. [2024-06-21 20:16:55,901 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4335 conditions, 2145 events. 1447/2145 cut-off events. For 49/49 co-relation queries the response was YES. Maximal size of possible extension queue 162. Compared 11460 event pairs, 968 based on Foata normal form. 1/2085 useless extension candidates. Maximal degree in co-relation 4322. Up to 2069 conditions per place. [2024-06-21 20:16:55,915 INFO L140 encePairwiseOnDemand]: 40/49 looper letters, 35 selfloop transitions, 5 changer transitions 0/53 dead transitions. [2024-06-21 20:16:55,915 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 53 transitions, 207 flow [2024-06-21 20:16:55,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-21 20:16:55,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-21 20:16:55,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 107 transitions. [2024-06-21 20:16:55,927 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7278911564625851 [2024-06-21 20:16:55,928 INFO L175 Difference]: Start difference. First operand has 52 places, 39 transitions, 90 flow. Second operand 3 states and 107 transitions. [2024-06-21 20:16:55,929 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 53 transitions, 207 flow [2024-06-21 20:16:55,931 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 53 transitions, 200 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-06-21 20:16:55,936 INFO L231 Difference]: Finished difference. Result has 51 places, 43 transitions, 125 flow [2024-06-21 20:16:55,938 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=86, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=125, PETRI_PLACES=51, PETRI_TRANSITIONS=43} [2024-06-21 20:16:55,941 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, -1 predicate places. [2024-06-21 20:16:55,941 INFO L495 AbstractCegarLoop]: Abstraction has has 51 places, 43 transitions, 125 flow [2024-06-21 20:16:55,942 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.333333333333332) internal successors, (67), 3 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:16:55,942 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:16:55,942 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:16:55,942 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-21 20:16:55,943 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 20:16:55,944 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:16:55,944 INFO L85 PathProgramCache]: Analyzing trace with hash 1102372348, now seen corresponding path program 1 times [2024-06-21 20:16:55,944 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:16:55,944 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [627805332] [2024-06-21 20:16:55,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:16:55,946 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:16:55,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:16:56,235 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:16:56,235 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:16:56,235 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [627805332] [2024-06-21 20:16:56,236 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [627805332] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:16:56,236 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:16:56,236 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 20:16:56,236 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [486388300] [2024-06-21 20:16:56,237 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:16:56,238 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 20:16:56,239 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:16:56,239 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 20:16:56,239 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-21 20:16:56,332 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 49 [2024-06-21 20:16:56,333 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 43 transitions, 125 flow. Second operand has 6 states, 6 states have (on average 20.166666666666668) internal successors, (121), 6 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:16:56,333 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:16:56,333 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 49 [2024-06-21 20:16:56,333 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:16:56,606 INFO L124 PetriNetUnfolderBase]: 2467/3605 cut-off events. [2024-06-21 20:16:56,606 INFO L125 PetriNetUnfolderBase]: For 758/966 co-relation queries the response was YES. [2024-06-21 20:16:56,610 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8515 conditions, 3605 events. 2467/3605 cut-off events. For 758/966 co-relation queries the response was YES. Maximal size of possible extension queue 230. Compared 19486 event pairs, 1331 based on Foata normal form. 35/3606 useless extension candidates. Maximal degree in co-relation 8503. Up to 3263 conditions per place. [2024-06-21 20:16:56,622 INFO L140 encePairwiseOnDemand]: 40/49 looper letters, 51 selfloop transitions, 7 changer transitions 0/69 dead transitions. [2024-06-21 20:16:56,622 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 69 transitions, 309 flow [2024-06-21 20:16:56,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-21 20:16:56,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-21 20:16:56,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 138 transitions. [2024-06-21 20:16:56,624 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7040816326530612 [2024-06-21 20:16:56,624 INFO L175 Difference]: Start difference. First operand has 51 places, 43 transitions, 125 flow. Second operand 4 states and 138 transitions. [2024-06-21 20:16:56,624 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 69 transitions, 309 flow [2024-06-21 20:16:56,625 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 69 transitions, 304 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-21 20:16:56,626 INFO L231 Difference]: Finished difference. Result has 53 places, 44 transitions, 152 flow [2024-06-21 20:16:56,626 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=116, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=152, PETRI_PLACES=53, PETRI_TRANSITIONS=44} [2024-06-21 20:16:56,626 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 1 predicate places. [2024-06-21 20:16:56,626 INFO L495 AbstractCegarLoop]: Abstraction has has 53 places, 44 transitions, 152 flow [2024-06-21 20:16:56,627 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 20.166666666666668) internal successors, (121), 6 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:16:56,627 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:16:56,627 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:16:56,627 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-06-21 20:16:56,627 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 20:16:56,628 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:16:56,628 INFO L85 PathProgramCache]: Analyzing trace with hash 1297873024, now seen corresponding path program 1 times [2024-06-21 20:16:56,628 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:16:56,628 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [337210647] [2024-06-21 20:16:56,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:16:56,629 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:16:56,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:16:56,764 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:16:56,765 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:16:56,765 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [337210647] [2024-06-21 20:16:56,766 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [337210647] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:16:56,766 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:16:56,766 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-21 20:16:56,766 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [346135800] [2024-06-21 20:16:56,766 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:16:56,766 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-21 20:16:56,767 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:16:56,767 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-21 20:16:56,767 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-06-21 20:16:56,794 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 49 [2024-06-21 20:16:56,795 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 44 transitions, 152 flow. Second operand has 4 states, 4 states have (on average 21.0) internal successors, (84), 4 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:16:56,795 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:16:56,795 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 49 [2024-06-21 20:16:56,795 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:16:57,056 INFO L124 PetriNetUnfolderBase]: 2618/4064 cut-off events. [2024-06-21 20:16:57,057 INFO L125 PetriNetUnfolderBase]: For 1862/1910 co-relation queries the response was YES. [2024-06-21 20:16:57,064 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9967 conditions, 4064 events. 2618/4064 cut-off events. For 1862/1910 co-relation queries the response was YES. Maximal size of possible extension queue 210. Compared 23315 event pairs, 1356 based on Foata normal form. 3/4039 useless extension candidates. Maximal degree in co-relation 9953. Up to 3654 conditions per place. [2024-06-21 20:16:57,080 INFO L140 encePairwiseOnDemand]: 40/49 looper letters, 49 selfloop transitions, 9 changer transitions 0/69 dead transitions. [2024-06-21 20:16:57,081 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 69 transitions, 340 flow [2024-06-21 20:16:57,081 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-21 20:16:57,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-21 20:16:57,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 131 transitions. [2024-06-21 20:16:57,082 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6683673469387755 [2024-06-21 20:16:57,082 INFO L175 Difference]: Start difference. First operand has 53 places, 44 transitions, 152 flow. Second operand 4 states and 131 transitions. [2024-06-21 20:16:57,083 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 69 transitions, 340 flow [2024-06-21 20:16:57,084 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 69 transitions, 326 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-06-21 20:16:57,085 INFO L231 Difference]: Finished difference. Result has 56 places, 52 transitions, 212 flow [2024-06-21 20:16:57,085 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=142, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=212, PETRI_PLACES=56, PETRI_TRANSITIONS=52} [2024-06-21 20:16:57,086 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 4 predicate places. [2024-06-21 20:16:57,086 INFO L495 AbstractCegarLoop]: Abstraction has has 56 places, 52 transitions, 212 flow [2024-06-21 20:16:57,086 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 21.0) internal successors, (84), 4 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:16:57,086 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:16:57,087 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:16:57,087 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-06-21 20:16:57,087 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 20:16:57,087 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:16:57,087 INFO L85 PathProgramCache]: Analyzing trace with hash -1969928397, now seen corresponding path program 1 times [2024-06-21 20:16:57,088 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:16:57,088 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1629124384] [2024-06-21 20:16:57,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:16:57,088 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:16:57,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:16:57,230 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:16:57,230 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:16:57,230 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1629124384] [2024-06-21 20:16:57,231 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1629124384] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:16:57,231 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:16:57,231 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-21 20:16:57,231 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1965310898] [2024-06-21 20:16:57,231 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:16:57,232 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-21 20:16:57,232 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:16:57,232 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-21 20:16:57,233 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-06-21 20:16:57,262 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 49 [2024-06-21 20:16:57,262 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 52 transitions, 212 flow. Second operand has 5 states, 5 states have (on average 20.8) internal successors, (104), 5 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:16:57,263 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:16:57,263 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 49 [2024-06-21 20:16:57,263 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:16:57,585 INFO L124 PetriNetUnfolderBase]: 2603/4009 cut-off events. [2024-06-21 20:16:57,585 INFO L125 PetriNetUnfolderBase]: For 3311/3363 co-relation queries the response was YES. [2024-06-21 20:16:57,591 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11036 conditions, 4009 events. 2603/4009 cut-off events. For 3311/3363 co-relation queries the response was YES. Maximal size of possible extension queue 204. Compared 22726 event pairs, 1272 based on Foata normal form. 6/3970 useless extension candidates. Maximal degree in co-relation 11020. Up to 3603 conditions per place. [2024-06-21 20:16:57,606 INFO L140 encePairwiseOnDemand]: 40/49 looper letters, 57 selfloop transitions, 12 changer transitions 0/80 dead transitions. [2024-06-21 20:16:57,606 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 80 transitions, 430 flow [2024-06-21 20:16:57,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-21 20:16:57,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-21 20:16:57,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 161 transitions. [2024-06-21 20:16:57,607 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6571428571428571 [2024-06-21 20:16:57,608 INFO L175 Difference]: Start difference. First operand has 56 places, 52 transitions, 212 flow. Second operand 5 states and 161 transitions. [2024-06-21 20:16:57,608 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 80 transitions, 430 flow [2024-06-21 20:16:57,610 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 80 transitions, 426 flow, removed 2 selfloop flow, removed 0 redundant places. [2024-06-21 20:16:57,611 INFO L231 Difference]: Finished difference. Result has 61 places, 55 transitions, 264 flow [2024-06-21 20:16:57,611 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=208, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=52, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=264, PETRI_PLACES=61, PETRI_TRANSITIONS=55} [2024-06-21 20:16:57,611 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 9 predicate places. [2024-06-21 20:16:57,612 INFO L495 AbstractCegarLoop]: Abstraction has has 61 places, 55 transitions, 264 flow [2024-06-21 20:16:57,612 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 20.8) internal successors, (104), 5 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:16:57,612 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:16:57,612 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:16:57,612 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-06-21 20:16:57,612 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 20:16:57,613 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:16:57,613 INFO L85 PathProgramCache]: Analyzing trace with hash -1726107371, now seen corresponding path program 1 times [2024-06-21 20:16:57,613 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:16:57,613 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [761960498] [2024-06-21 20:16:57,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:16:57,613 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:16:57,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:16:57,747 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:16:57,748 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:16:57,748 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [761960498] [2024-06-21 20:16:57,748 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [761960498] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:16:57,748 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:16:57,748 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 20:16:57,748 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [306423104] [2024-06-21 20:16:57,749 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:16:57,749 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 20:16:57,749 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:16:57,749 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 20:16:57,750 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-21 20:16:57,794 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 49 [2024-06-21 20:16:57,795 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 55 transitions, 264 flow. Second operand has 6 states, 6 states have (on average 19.666666666666668) internal successors, (118), 6 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:16:57,795 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:16:57,795 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 49 [2024-06-21 20:16:57,795 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:16:58,128 INFO L124 PetriNetUnfolderBase]: 3372/5076 cut-off events. [2024-06-21 20:16:58,129 INFO L125 PetriNetUnfolderBase]: For 6317/6368 co-relation queries the response was YES. [2024-06-21 20:16:58,139 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15117 conditions, 5076 events. 3372/5076 cut-off events. For 6317/6368 co-relation queries the response was YES. Maximal size of possible extension queue 244. Compared 28339 event pairs, 1298 based on Foata normal form. 16/5060 useless extension candidates. Maximal degree in co-relation 15098. Up to 4533 conditions per place. [2024-06-21 20:16:58,157 INFO L140 encePairwiseOnDemand]: 38/49 looper letters, 55 selfloop transitions, 17 changer transitions 0/82 dead transitions. [2024-06-21 20:16:58,157 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 82 transitions, 502 flow [2024-06-21 20:16:58,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-21 20:16:58,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-21 20:16:58,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 134 transitions. [2024-06-21 20:16:58,158 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6836734693877551 [2024-06-21 20:16:58,159 INFO L175 Difference]: Start difference. First operand has 61 places, 55 transitions, 264 flow. Second operand 4 states and 134 transitions. [2024-06-21 20:16:58,159 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 82 transitions, 502 flow [2024-06-21 20:16:58,164 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 82 transitions, 472 flow, removed 5 selfloop flow, removed 3 redundant places. [2024-06-21 20:16:58,165 INFO L231 Difference]: Finished difference. Result has 62 places, 61 transitions, 332 flow [2024-06-21 20:16:58,165 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=234, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=55, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=332, PETRI_PLACES=62, PETRI_TRANSITIONS=61} [2024-06-21 20:16:58,165 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 10 predicate places. [2024-06-21 20:16:58,166 INFO L495 AbstractCegarLoop]: Abstraction has has 62 places, 61 transitions, 332 flow [2024-06-21 20:16:58,166 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 19.666666666666668) internal successors, (118), 6 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:16:58,166 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:16:58,166 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:16:58,166 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-06-21 20:16:58,166 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 20:16:58,167 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:16:58,167 INFO L85 PathProgramCache]: Analyzing trace with hash -1725987401, now seen corresponding path program 2 times [2024-06-21 20:16:58,167 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:16:58,167 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [948970995] [2024-06-21 20:16:58,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:16:58,168 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:16:58,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:16:58,320 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:16:58,321 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:16:58,321 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [948970995] [2024-06-21 20:16:58,321 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [948970995] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:16:58,321 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:16:58,321 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 20:16:58,321 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1165069082] [2024-06-21 20:16:58,322 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:16:58,322 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 20:16:58,322 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:16:58,322 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 20:16:58,323 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-21 20:16:58,365 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 49 [2024-06-21 20:16:58,366 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 61 transitions, 332 flow. Second operand has 6 states, 6 states have (on average 19.666666666666668) internal successors, (118), 6 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:16:58,366 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:16:58,366 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 49 [2024-06-21 20:16:58,366 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:16:58,751 INFO L124 PetriNetUnfolderBase]: 3363/5186 cut-off events. [2024-06-21 20:16:58,751 INFO L125 PetriNetUnfolderBase]: For 9840/10023 co-relation queries the response was YES. [2024-06-21 20:16:58,761 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17169 conditions, 5186 events. 3363/5186 cut-off events. For 9840/10023 co-relation queries the response was YES. Maximal size of possible extension queue 248. Compared 29818 event pairs, 1431 based on Foata normal form. 18/5167 useless extension candidates. Maximal degree in co-relation 17149. Up to 4575 conditions per place. [2024-06-21 20:16:58,782 INFO L140 encePairwiseOnDemand]: 39/49 looper letters, 68 selfloop transitions, 20 changer transitions 0/98 dead transitions. [2024-06-21 20:16:58,783 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 98 transitions, 666 flow [2024-06-21 20:16:58,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-21 20:16:58,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-21 20:16:58,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 161 transitions. [2024-06-21 20:16:58,784 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6571428571428571 [2024-06-21 20:16:58,784 INFO L175 Difference]: Start difference. First operand has 62 places, 61 transitions, 332 flow. Second operand 5 states and 161 transitions. [2024-06-21 20:16:58,784 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 98 transitions, 666 flow [2024-06-21 20:16:58,795 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 98 transitions, 600 flow, removed 18 selfloop flow, removed 2 redundant places. [2024-06-21 20:16:58,798 INFO L231 Difference]: Finished difference. Result has 67 places, 72 transitions, 447 flow [2024-06-21 20:16:58,798 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=286, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=447, PETRI_PLACES=67, PETRI_TRANSITIONS=72} [2024-06-21 20:16:58,801 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 15 predicate places. [2024-06-21 20:16:58,801 INFO L495 AbstractCegarLoop]: Abstraction has has 67 places, 72 transitions, 447 flow [2024-06-21 20:16:58,801 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 19.666666666666668) internal successors, (118), 6 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:16:58,801 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:16:58,801 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:16:58,801 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-06-21 20:16:58,802 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 20:16:58,802 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:16:58,802 INFO L85 PathProgramCache]: Analyzing trace with hash -2128335054, now seen corresponding path program 1 times [2024-06-21 20:16:58,802 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:16:58,804 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [241233589] [2024-06-21 20:16:58,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:16:58,804 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:16:58,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:16:59,000 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:16:59,001 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:16:59,002 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [241233589] [2024-06-21 20:16:59,003 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [241233589] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:16:59,004 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:16:59,004 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 20:16:59,004 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [754982537] [2024-06-21 20:16:59,004 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:16:59,004 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 20:16:59,005 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:16:59,005 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 20:16:59,005 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-21 20:16:59,068 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 49 [2024-06-21 20:16:59,069 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 72 transitions, 447 flow. Second operand has 7 states, 7 states have (on average 19.571428571428573) internal successors, (137), 7 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:16:59,069 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:16:59,069 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 49 [2024-06-21 20:16:59,069 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:16:59,685 INFO L124 PetriNetUnfolderBase]: 4824/7273 cut-off events. [2024-06-21 20:16:59,685 INFO L125 PetriNetUnfolderBase]: For 18239/18453 co-relation queries the response was YES. [2024-06-21 20:16:59,706 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25583 conditions, 7273 events. 4824/7273 cut-off events. For 18239/18453 co-relation queries the response was YES. Maximal size of possible extension queue 393. Compared 43898 event pairs, 1097 based on Foata normal form. 104/7308 useless extension candidates. Maximal degree in co-relation 25560. Up to 4682 conditions per place. [2024-06-21 20:16:59,733 INFO L140 encePairwiseOnDemand]: 38/49 looper letters, 87 selfloop transitions, 34 changer transitions 0/131 dead transitions. [2024-06-21 20:16:59,733 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 131 transitions, 945 flow [2024-06-21 20:16:59,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 20:16:59,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 20:16:59,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 208 transitions. [2024-06-21 20:16:59,734 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7074829931972789 [2024-06-21 20:16:59,735 INFO L175 Difference]: Start difference. First operand has 67 places, 72 transitions, 447 flow. Second operand 6 states and 208 transitions. [2024-06-21 20:16:59,735 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 131 transitions, 945 flow [2024-06-21 20:16:59,747 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 131 transitions, 913 flow, removed 16 selfloop flow, removed 0 redundant places. [2024-06-21 20:16:59,748 INFO L231 Difference]: Finished difference. Result has 74 places, 80 transitions, 594 flow [2024-06-21 20:16:59,748 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=415, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=72, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=594, PETRI_PLACES=74, PETRI_TRANSITIONS=80} [2024-06-21 20:16:59,750 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 22 predicate places. [2024-06-21 20:16:59,750 INFO L495 AbstractCegarLoop]: Abstraction has has 74 places, 80 transitions, 594 flow [2024-06-21 20:16:59,750 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.571428571428573) internal successors, (137), 7 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:16:59,750 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:16:59,750 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:16:59,750 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-06-21 20:16:59,751 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 20:16:59,751 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:16:59,751 INFO L85 PathProgramCache]: Analyzing trace with hash 1393136916, now seen corresponding path program 2 times [2024-06-21 20:16:59,751 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:16:59,751 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [894017761] [2024-06-21 20:16:59,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:16:59,752 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:16:59,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:16:59,923 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:16:59,923 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:16:59,923 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [894017761] [2024-06-21 20:16:59,923 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [894017761] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:16:59,923 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:16:59,923 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 20:16:59,924 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [892377432] [2024-06-21 20:16:59,924 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:16:59,924 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 20:16:59,925 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:16:59,925 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 20:16:59,925 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-21 20:16:59,965 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 49 [2024-06-21 20:16:59,966 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 80 transitions, 594 flow. Second operand has 7 states, 7 states have (on average 19.571428571428573) internal successors, (137), 7 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:16:59,966 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:16:59,966 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 49 [2024-06-21 20:16:59,966 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:17:00,459 INFO L124 PetriNetUnfolderBase]: 4554/6933 cut-off events. [2024-06-21 20:17:00,459 INFO L125 PetriNetUnfolderBase]: For 24501/24735 co-relation queries the response was YES. [2024-06-21 20:17:00,476 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26096 conditions, 6933 events. 4554/6933 cut-off events. For 24501/24735 co-relation queries the response was YES. Maximal size of possible extension queue 363. Compared 41859 event pairs, 1415 based on Foata normal form. 122/6980 useless extension candidates. Maximal degree in co-relation 26069. Up to 5428 conditions per place. [2024-06-21 20:17:00,502 INFO L140 encePairwiseOnDemand]: 38/49 looper letters, 77 selfloop transitions, 29 changer transitions 0/116 dead transitions. [2024-06-21 20:17:00,502 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 116 transitions, 936 flow [2024-06-21 20:17:00,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-21 20:17:00,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-21 20:17:00,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 169 transitions. [2024-06-21 20:17:00,504 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.689795918367347 [2024-06-21 20:17:00,504 INFO L175 Difference]: Start difference. First operand has 74 places, 80 transitions, 594 flow. Second operand 5 states and 169 transitions. [2024-06-21 20:17:00,504 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 116 transitions, 936 flow [2024-06-21 20:17:00,611 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 116 transitions, 884 flow, removed 13 selfloop flow, removed 2 redundant places. [2024-06-21 20:17:00,613 INFO L231 Difference]: Finished difference. Result has 77 places, 82 transitions, 646 flow [2024-06-21 20:17:00,613 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=548, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=80, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=646, PETRI_PLACES=77, PETRI_TRANSITIONS=82} [2024-06-21 20:17:00,613 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 25 predicate places. [2024-06-21 20:17:00,613 INFO L495 AbstractCegarLoop]: Abstraction has has 77 places, 82 transitions, 646 flow [2024-06-21 20:17:00,614 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.571428571428573) internal successors, (137), 7 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:17:00,614 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:17:00,614 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:17:00,614 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-06-21 20:17:00,614 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 20:17:00,614 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:17:00,615 INFO L85 PathProgramCache]: Analyzing trace with hash -816466250, now seen corresponding path program 3 times [2024-06-21 20:17:00,615 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:17:00,615 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1117900577] [2024-06-21 20:17:00,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:17:00,615 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:17:00,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:17:00,837 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:17:00,837 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:17:00,837 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1117900577] [2024-06-21 20:17:00,837 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1117900577] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:17:00,837 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:17:00,837 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 20:17:00,838 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [224740770] [2024-06-21 20:17:00,838 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:17:00,838 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 20:17:00,838 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:17:00,838 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 20:17:00,838 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-21 20:17:00,898 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 49 [2024-06-21 20:17:00,898 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 77 places, 82 transitions, 646 flow. Second operand has 7 states, 7 states have (on average 19.571428571428573) internal successors, (137), 7 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:17:00,898 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:17:00,898 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 49 [2024-06-21 20:17:00,898 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:17:01,574 INFO L124 PetriNetUnfolderBase]: 4631/7073 cut-off events. [2024-06-21 20:17:01,574 INFO L125 PetriNetUnfolderBase]: For 25081/25369 co-relation queries the response was YES. [2024-06-21 20:17:01,593 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27069 conditions, 7073 events. 4631/7073 cut-off events. For 25081/25369 co-relation queries the response was YES. Maximal size of possible extension queue 367. Compared 42789 event pairs, 1615 based on Foata normal form. 34/7038 useless extension candidates. Maximal degree in co-relation 27040. Up to 6275 conditions per place. [2024-06-21 20:17:01,623 INFO L140 encePairwiseOnDemand]: 39/49 looper letters, 89 selfloop transitions, 22 changer transitions 0/121 dead transitions. [2024-06-21 20:17:01,624 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 121 transitions, 996 flow [2024-06-21 20:17:01,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 20:17:01,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 20:17:01,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 192 transitions. [2024-06-21 20:17:01,625 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6530612244897959 [2024-06-21 20:17:01,625 INFO L175 Difference]: Start difference. First operand has 77 places, 82 transitions, 646 flow. Second operand 6 states and 192 transitions. [2024-06-21 20:17:01,625 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 121 transitions, 996 flow [2024-06-21 20:17:01,667 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 121 transitions, 948 flow, removed 1 selfloop flow, removed 3 redundant places. [2024-06-21 20:17:01,668 INFO L231 Difference]: Finished difference. Result has 80 places, 84 transitions, 682 flow [2024-06-21 20:17:01,669 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=598, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=82, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=682, PETRI_PLACES=80, PETRI_TRANSITIONS=84} [2024-06-21 20:17:01,669 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 28 predicate places. [2024-06-21 20:17:01,669 INFO L495 AbstractCegarLoop]: Abstraction has has 80 places, 84 transitions, 682 flow [2024-06-21 20:17:01,670 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.571428571428573) internal successors, (137), 7 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:17:01,670 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:17:01,670 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:17:01,670 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-06-21 20:17:01,670 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 20:17:01,671 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:17:01,671 INFO L85 PathProgramCache]: Analyzing trace with hash -816281800, now seen corresponding path program 1 times [2024-06-21 20:17:01,671 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:17:01,671 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1298329887] [2024-06-21 20:17:01,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:17:01,672 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:17:01,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:17:01,816 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:17:01,816 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:17:01,816 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1298329887] [2024-06-21 20:17:01,817 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1298329887] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:17:01,817 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:17:01,817 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 20:17:01,817 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1508962937] [2024-06-21 20:17:01,817 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:17:01,818 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 20:17:01,818 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:17:01,818 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 20:17:01,820 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-21 20:17:01,873 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 49 [2024-06-21 20:17:01,874 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 80 places, 84 transitions, 682 flow. Second operand has 7 states, 7 states have (on average 19.571428571428573) internal successors, (137), 7 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:17:01,874 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:17:01,874 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 49 [2024-06-21 20:17:01,874 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:17:02,470 INFO L124 PetriNetUnfolderBase]: 4592/7016 cut-off events. [2024-06-21 20:17:02,471 INFO L125 PetriNetUnfolderBase]: For 27475/27763 co-relation queries the response was YES. [2024-06-21 20:17:02,491 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27209 conditions, 7016 events. 4592/7016 cut-off events. For 27475/27763 co-relation queries the response was YES. Maximal size of possible extension queue 364. Compared 42382 event pairs, 1399 based on Foata normal form. 28/6975 useless extension candidates. Maximal degree in co-relation 27179. Up to 5876 conditions per place. [2024-06-21 20:17:02,516 INFO L140 encePairwiseOnDemand]: 39/49 looper letters, 89 selfloop transitions, 28 changer transitions 0/127 dead transitions. [2024-06-21 20:17:02,516 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 84 places, 127 transitions, 1059 flow [2024-06-21 20:17:02,517 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 20:17:02,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 20:17:02,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 194 transitions. [2024-06-21 20:17:02,517 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6598639455782312 [2024-06-21 20:17:02,518 INFO L175 Difference]: Start difference. First operand has 80 places, 84 transitions, 682 flow. Second operand 6 states and 194 transitions. [2024-06-21 20:17:02,518 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 84 places, 127 transitions, 1059 flow [2024-06-21 20:17:02,554 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 127 transitions, 1005 flow, removed 7 selfloop flow, removed 4 redundant places. [2024-06-21 20:17:02,556 INFO L231 Difference]: Finished difference. Result has 82 places, 86 transitions, 736 flow [2024-06-21 20:17:02,556 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=610, PETRI_DIFFERENCE_MINUEND_PLACES=75, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=83, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=736, PETRI_PLACES=82, PETRI_TRANSITIONS=86} [2024-06-21 20:17:02,556 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 30 predicate places. [2024-06-21 20:17:02,556 INFO L495 AbstractCegarLoop]: Abstraction has has 82 places, 86 transitions, 736 flow [2024-06-21 20:17:02,557 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.571428571428573) internal successors, (137), 7 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:17:02,557 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:17:02,557 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:17:02,557 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-06-21 20:17:02,557 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 20:17:02,558 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:17:02,558 INFO L85 PathProgramCache]: Analyzing trace with hash 176708674, now seen corresponding path program 1 times [2024-06-21 20:17:02,558 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:17:02,558 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [804672003] [2024-06-21 20:17:02,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:17:02,558 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:17:02,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:17:02,650 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:17:02,650 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:17:02,651 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [804672003] [2024-06-21 20:17:02,651 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [804672003] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:17:02,651 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:17:02,651 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-21 20:17:02,651 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1053636346] [2024-06-21 20:17:02,651 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:17:02,651 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-21 20:17:02,652 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:17:02,652 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-21 20:17:02,652 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-21 20:17:02,681 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 49 [2024-06-21 20:17:02,681 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 82 places, 86 transitions, 736 flow. Second operand has 5 states, 5 states have (on average 21.4) internal successors, (107), 5 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:17:02,681 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:17:02,682 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 49 [2024-06-21 20:17:02,682 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:17:03,117 INFO L124 PetriNetUnfolderBase]: 3701/5678 cut-off events. [2024-06-21 20:17:03,117 INFO L125 PetriNetUnfolderBase]: For 26498/26719 co-relation queries the response was YES. [2024-06-21 20:17:03,132 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23358 conditions, 5678 events. 3701/5678 cut-off events. For 26498/26719 co-relation queries the response was YES. Maximal size of possible extension queue 297. Compared 33929 event pairs, 1373 based on Foata normal form. 6/5624 useless extension candidates. Maximal degree in co-relation 23326. Up to 5213 conditions per place. [2024-06-21 20:17:03,152 INFO L140 encePairwiseOnDemand]: 40/49 looper letters, 87 selfloop transitions, 20 changer transitions 0/118 dead transitions. [2024-06-21 20:17:03,153 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 86 places, 118 transitions, 1106 flow [2024-06-21 20:17:03,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-21 20:17:03,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-21 20:17:03,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 158 transitions. [2024-06-21 20:17:03,154 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6448979591836734 [2024-06-21 20:17:03,154 INFO L175 Difference]: Start difference. First operand has 82 places, 86 transitions, 736 flow. Second operand 5 states and 158 transitions. [2024-06-21 20:17:03,155 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 86 places, 118 transitions, 1106 flow [2024-06-21 20:17:03,185 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 83 places, 118 transitions, 1047 flow, removed 9 selfloop flow, removed 3 redundant places. [2024-06-21 20:17:03,187 INFO L231 Difference]: Finished difference. Result has 86 places, 97 transitions, 866 flow [2024-06-21 20:17:03,188 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=677, PETRI_DIFFERENCE_MINUEND_PLACES=79, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=86, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=866, PETRI_PLACES=86, PETRI_TRANSITIONS=97} [2024-06-21 20:17:03,188 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 34 predicate places. [2024-06-21 20:17:03,188 INFO L495 AbstractCegarLoop]: Abstraction has has 86 places, 97 transitions, 866 flow [2024-06-21 20:17:03,188 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 21.4) internal successors, (107), 5 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:17:03,189 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:17:03,189 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:17:03,189 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-06-21 20:17:03,189 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 20:17:03,189 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:17:03,190 INFO L85 PathProgramCache]: Analyzing trace with hash 228593815, now seen corresponding path program 1 times [2024-06-21 20:17:03,190 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:17:03,190 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [917664326] [2024-06-21 20:17:03,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:17:03,190 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:17:03,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:17:03,297 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:17:03,297 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:17:03,297 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [917664326] [2024-06-21 20:17:03,297 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [917664326] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:17:03,297 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:17:03,297 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-21 20:17:03,298 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [356752484] [2024-06-21 20:17:03,298 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:17:03,298 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-21 20:17:03,298 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:17:03,299 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-21 20:17:03,299 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-06-21 20:17:03,323 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 49 [2024-06-21 20:17:03,324 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 97 transitions, 866 flow. Second operand has 4 states, 4 states have (on average 22.5) internal successors, (90), 4 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:17:03,324 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:17:03,324 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 49 [2024-06-21 20:17:03,324 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:17:03,953 INFO L124 PetriNetUnfolderBase]: 5235/7909 cut-off events. [2024-06-21 20:17:03,953 INFO L125 PetriNetUnfolderBase]: For 41346/41452 co-relation queries the response was YES. [2024-06-21 20:17:03,976 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31917 conditions, 7909 events. 5235/7909 cut-off events. For 41346/41452 co-relation queries the response was YES. Maximal size of possible extension queue 404. Compared 48386 event pairs, 1971 based on Foata normal form. 12/7763 useless extension candidates. Maximal degree in co-relation 31882. Up to 7087 conditions per place. [2024-06-21 20:17:04,004 INFO L140 encePairwiseOnDemand]: 42/49 looper letters, 76 selfloop transitions, 11 changer transitions 0/118 dead transitions. [2024-06-21 20:17:04,004 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 89 places, 118 transitions, 1138 flow [2024-06-21 20:17:04,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-21 20:17:04,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-21 20:17:04,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 122 transitions. [2024-06-21 20:17:04,005 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6224489795918368 [2024-06-21 20:17:04,006 INFO L175 Difference]: Start difference. First operand has 86 places, 97 transitions, 866 flow. Second operand 4 states and 122 transitions. [2024-06-21 20:17:04,006 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 89 places, 118 transitions, 1138 flow [2024-06-21 20:17:04,065 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 89 places, 118 transitions, 1096 flow, removed 21 selfloop flow, removed 0 redundant places. [2024-06-21 20:17:04,067 INFO L231 Difference]: Finished difference. Result has 91 places, 107 transitions, 947 flow [2024-06-21 20:17:04,067 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=824, PETRI_DIFFERENCE_MINUEND_PLACES=86, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=97, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=88, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=947, PETRI_PLACES=91, PETRI_TRANSITIONS=107} [2024-06-21 20:17:04,068 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 39 predicate places. [2024-06-21 20:17:04,068 INFO L495 AbstractCegarLoop]: Abstraction has has 91 places, 107 transitions, 947 flow [2024-06-21 20:17:04,068 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 22.5) internal successors, (90), 4 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:17:04,068 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:17:04,068 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:17:04,069 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-06-21 20:17:04,069 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 20:17:04,069 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:17:04,069 INFO L85 PathProgramCache]: Analyzing trace with hash -573087969, now seen corresponding path program 1 times [2024-06-21 20:17:04,069 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:17:04,069 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1170535788] [2024-06-21 20:17:04,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:17:04,070 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:17:04,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:17:04,194 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:17:04,194 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:17:04,194 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1170535788] [2024-06-21 20:17:04,195 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1170535788] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:17:04,195 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:17:04,195 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 20:17:04,195 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [754804230] [2024-06-21 20:17:04,195 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:17:04,195 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 20:17:04,196 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:17:04,196 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 20:17:04,196 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-21 20:17:04,238 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 49 [2024-06-21 20:17:04,239 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 91 places, 107 transitions, 947 flow. Second operand has 6 states, 6 states have (on average 21.166666666666668) internal successors, (127), 6 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:17:04,239 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:17:04,239 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 49 [2024-06-21 20:17:04,239 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:17:04,788 INFO L124 PetriNetUnfolderBase]: 4657/7188 cut-off events. [2024-06-21 20:17:04,789 INFO L125 PetriNetUnfolderBase]: For 44422/44823 co-relation queries the response was YES. [2024-06-21 20:17:04,814 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32052 conditions, 7188 events. 4657/7188 cut-off events. For 44422/44823 co-relation queries the response was YES. Maximal size of possible extension queue 382. Compared 44546 event pairs, 1500 based on Foata normal form. 102/7216 useless extension candidates. Maximal degree in co-relation 32013. Up to 5914 conditions per place. [2024-06-21 20:17:04,841 INFO L140 encePairwiseOnDemand]: 40/49 looper letters, 102 selfloop transitions, 32 changer transitions 0/149 dead transitions. [2024-06-21 20:17:04,841 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 96 places, 149 transitions, 1450 flow [2024-06-21 20:17:04,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 20:17:04,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 20:17:04,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 194 transitions. [2024-06-21 20:17:04,842 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6598639455782312 [2024-06-21 20:17:04,843 INFO L175 Difference]: Start difference. First operand has 91 places, 107 transitions, 947 flow. Second operand 6 states and 194 transitions. [2024-06-21 20:17:04,843 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 96 places, 149 transitions, 1450 flow [2024-06-21 20:17:04,911 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 96 places, 149 transitions, 1446 flow, removed 2 selfloop flow, removed 0 redundant places. [2024-06-21 20:17:04,913 INFO L231 Difference]: Finished difference. Result has 98 places, 112 transitions, 1117 flow [2024-06-21 20:17:04,913 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=943, PETRI_DIFFERENCE_MINUEND_PLACES=91, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=107, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=77, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1117, PETRI_PLACES=98, PETRI_TRANSITIONS=112} [2024-06-21 20:17:04,914 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 46 predicate places. [2024-06-21 20:17:04,914 INFO L495 AbstractCegarLoop]: Abstraction has has 98 places, 112 transitions, 1117 flow [2024-06-21 20:17:04,914 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 21.166666666666668) internal successors, (127), 6 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:17:04,914 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:17:04,914 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:17:04,914 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-06-21 20:17:04,915 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 20:17:04,915 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:17:04,915 INFO L85 PathProgramCache]: Analyzing trace with hash 547062797, now seen corresponding path program 2 times [2024-06-21 20:17:04,915 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:17:04,915 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1655076161] [2024-06-21 20:17:04,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:17:04,916 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:17:04,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:17:05,041 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:17:05,042 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:17:05,042 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1655076161] [2024-06-21 20:17:05,042 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1655076161] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:17:05,042 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:17:05,042 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 20:17:05,042 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1708420751] [2024-06-21 20:17:05,042 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:17:05,043 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 20:17:05,043 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:17:05,043 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 20:17:05,043 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-21 20:17:05,080 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 49 [2024-06-21 20:17:05,080 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 98 places, 112 transitions, 1117 flow. Second operand has 6 states, 6 states have (on average 21.166666666666668) internal successors, (127), 6 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:17:05,081 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:17:05,081 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 49 [2024-06-21 20:17:05,081 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:17:05,744 INFO L124 PetriNetUnfolderBase]: 4558/7078 cut-off events. [2024-06-21 20:17:05,744 INFO L125 PetriNetUnfolderBase]: For 49842/50193 co-relation queries the response was YES. [2024-06-21 20:17:05,774 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32306 conditions, 7078 events. 4558/7078 cut-off events. For 49842/50193 co-relation queries the response was YES. Maximal size of possible extension queue 371. Compared 44089 event pairs, 1607 based on Foata normal form. 60/7064 useless extension candidates. Maximal degree in co-relation 32263. Up to 6243 conditions per place. [2024-06-21 20:17:05,806 INFO L140 encePairwiseOnDemand]: 40/49 looper letters, 100 selfloop transitions, 26 changer transitions 0/141 dead transitions. [2024-06-21 20:17:05,806 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 103 places, 141 transitions, 1453 flow [2024-06-21 20:17:05,807 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 20:17:05,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 20:17:05,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 187 transitions. [2024-06-21 20:17:05,808 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6360544217687075 [2024-06-21 20:17:05,808 INFO L175 Difference]: Start difference. First operand has 98 places, 112 transitions, 1117 flow. Second operand 6 states and 187 transitions. [2024-06-21 20:17:05,808 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 103 places, 141 transitions, 1453 flow [2024-06-21 20:17:05,966 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 100 places, 141 transitions, 1371 flow, removed 18 selfloop flow, removed 3 redundant places. [2024-06-21 20:17:05,968 INFO L231 Difference]: Finished difference. Result has 101 places, 112 transitions, 1095 flow [2024-06-21 20:17:05,969 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=1035, PETRI_DIFFERENCE_MINUEND_PLACES=95, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=112, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=86, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1095, PETRI_PLACES=101, PETRI_TRANSITIONS=112} [2024-06-21 20:17:05,969 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 49 predicate places. [2024-06-21 20:17:05,969 INFO L495 AbstractCegarLoop]: Abstraction has has 101 places, 112 transitions, 1095 flow [2024-06-21 20:17:05,969 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 21.166666666666668) internal successors, (127), 6 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:17:05,970 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:17:05,970 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:17:05,970 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-06-21 20:17:05,970 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 20:17:05,970 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:17:05,971 INFO L85 PathProgramCache]: Analyzing trace with hash 1762622183, now seen corresponding path program 1 times [2024-06-21 20:17:05,971 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:17:05,971 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [226235588] [2024-06-21 20:17:05,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:17:05,971 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:17:05,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:17:06,114 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:17:06,115 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:17:06,115 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [226235588] [2024-06-21 20:17:06,115 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [226235588] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:17:06,115 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:17:06,115 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 20:17:06,116 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [607611486] [2024-06-21 20:17:06,116 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:17:06,116 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 20:17:06,116 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:17:06,117 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 20:17:06,117 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-21 20:17:06,157 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 49 [2024-06-21 20:17:06,157 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 101 places, 112 transitions, 1095 flow. Second operand has 7 states, 7 states have (on average 20.0) internal successors, (140), 7 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:17:06,158 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:17:06,158 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 49 [2024-06-21 20:17:06,158 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:17:06,908 INFO L124 PetriNetUnfolderBase]: 5399/8107 cut-off events. [2024-06-21 20:17:06,908 INFO L125 PetriNetUnfolderBase]: For 53418/53807 co-relation queries the response was YES. [2024-06-21 20:17:06,942 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36429 conditions, 8107 events. 5399/8107 cut-off events. For 53418/53807 co-relation queries the response was YES. Maximal size of possible extension queue 425. Compared 49203 event pairs, 1733 based on Foata normal form. 56/8035 useless extension candidates. Maximal degree in co-relation 36385. Up to 7318 conditions per place. [2024-06-21 20:17:06,979 INFO L140 encePairwiseOnDemand]: 39/49 looper letters, 87 selfloop transitions, 41 changer transitions 0/140 dead transitions. [2024-06-21 20:17:06,979 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 105 places, 140 transitions, 1463 flow [2024-06-21 20:17:06,980 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-21 20:17:06,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-21 20:17:06,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 160 transitions. [2024-06-21 20:17:06,981 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6530612244897959 [2024-06-21 20:17:06,981 INFO L175 Difference]: Start difference. First operand has 101 places, 112 transitions, 1095 flow. Second operand 5 states and 160 transitions. [2024-06-21 20:17:06,981 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 105 places, 140 transitions, 1463 flow [2024-06-21 20:17:07,083 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 101 places, 140 transitions, 1407 flow, removed 4 selfloop flow, removed 4 redundant places. [2024-06-21 20:17:07,085 INFO L231 Difference]: Finished difference. Result has 102 places, 116 transitions, 1189 flow [2024-06-21 20:17:07,085 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=1039, PETRI_DIFFERENCE_MINUEND_PLACES=97, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=112, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=71, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1189, PETRI_PLACES=102, PETRI_TRANSITIONS=116} [2024-06-21 20:17:07,085 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 50 predicate places. [2024-06-21 20:17:07,086 INFO L495 AbstractCegarLoop]: Abstraction has has 102 places, 116 transitions, 1189 flow [2024-06-21 20:17:07,086 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 20.0) internal successors, (140), 7 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:17:07,086 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:17:07,086 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:17:07,086 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-06-21 20:17:07,086 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 20:17:07,087 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:17:07,087 INFO L85 PathProgramCache]: Analyzing trace with hash 1877913353, now seen corresponding path program 2 times [2024-06-21 20:17:07,087 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:17:07,087 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [542174788] [2024-06-21 20:17:07,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:17:07,088 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:17:07,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:17:07,214 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:17:07,214 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:17:07,214 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [542174788] [2024-06-21 20:17:07,214 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [542174788] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:17:07,215 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:17:07,215 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 20:17:07,215 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1419920894] [2024-06-21 20:17:07,215 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:17:07,215 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 20:17:07,216 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:17:07,216 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 20:17:07,216 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-21 20:17:07,265 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 49 [2024-06-21 20:17:07,265 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 102 places, 116 transitions, 1189 flow. Second operand has 7 states, 7 states have (on average 20.0) internal successors, (140), 7 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:17:07,265 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:17:07,265 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 49 [2024-06-21 20:17:07,266 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:17:08,085 INFO L124 PetriNetUnfolderBase]: 5466/8212 cut-off events. [2024-06-21 20:17:08,085 INFO L125 PetriNetUnfolderBase]: For 62280/62845 co-relation queries the response was YES. [2024-06-21 20:17:08,112 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38853 conditions, 8212 events. 5466/8212 cut-off events. For 62280/62845 co-relation queries the response was YES. Maximal size of possible extension queue 431. Compared 49988 event pairs, 1737 based on Foata normal form. 90/8176 useless extension candidates. Maximal degree in co-relation 38808. Up to 7362 conditions per place. [2024-06-21 20:17:08,144 INFO L140 encePairwiseOnDemand]: 39/49 looper letters, 93 selfloop transitions, 51 changer transitions 0/156 dead transitions. [2024-06-21 20:17:08,144 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 107 places, 156 transitions, 1723 flow [2024-06-21 20:17:08,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 20:17:08,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 20:17:08,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 190 transitions. [2024-06-21 20:17:08,149 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6462585034013606 [2024-06-21 20:17:08,149 INFO L175 Difference]: Start difference. First operand has 102 places, 116 transitions, 1189 flow. Second operand 6 states and 190 transitions. [2024-06-21 20:17:08,149 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 107 places, 156 transitions, 1723 flow [2024-06-21 20:17:08,234 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 104 places, 156 transitions, 1621 flow, removed 15 selfloop flow, removed 3 redundant places. [2024-06-21 20:17:08,236 INFO L231 Difference]: Finished difference. Result has 105 places, 124 transitions, 1314 flow [2024-06-21 20:17:08,236 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=1087, PETRI_DIFFERENCE_MINUEND_PLACES=99, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=116, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1314, PETRI_PLACES=105, PETRI_TRANSITIONS=124} [2024-06-21 20:17:08,237 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 53 predicate places. [2024-06-21 20:17:08,237 INFO L495 AbstractCegarLoop]: Abstraction has has 105 places, 124 transitions, 1314 flow [2024-06-21 20:17:08,237 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 20.0) internal successors, (140), 7 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:17:08,237 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:17:08,237 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:17:08,238 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-06-21 20:17:08,238 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 20:17:08,238 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:17:08,238 INFO L85 PathProgramCache]: Analyzing trace with hash 1878182123, now seen corresponding path program 3 times [2024-06-21 20:17:08,238 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:17:08,239 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1150214307] [2024-06-21 20:17:08,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:17:08,239 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:17:08,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:17:08,359 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:17:08,359 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:17:08,359 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1150214307] [2024-06-21 20:17:08,359 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1150214307] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:17:08,359 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:17:08,360 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 20:17:08,360 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1970493205] [2024-06-21 20:17:08,360 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:17:08,360 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 20:17:08,360 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:17:08,361 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 20:17:08,361 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-21 20:17:08,408 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 49 [2024-06-21 20:17:08,409 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 105 places, 124 transitions, 1314 flow. Second operand has 7 states, 7 states have (on average 20.0) internal successors, (140), 7 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:17:08,409 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:17:08,409 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 49 [2024-06-21 20:17:08,409 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:17:09,054 INFO L124 PetriNetUnfolderBase]: 5482/8238 cut-off events. [2024-06-21 20:17:09,054 INFO L125 PetriNetUnfolderBase]: For 72752/73320 co-relation queries the response was YES. [2024-06-21 20:17:09,089 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40964 conditions, 8238 events. 5482/8238 cut-off events. For 72752/73320 co-relation queries the response was YES. Maximal size of possible extension queue 431. Compared 50100 event pairs, 1737 based on Foata normal form. 103/8215 useless extension candidates. Maximal degree in co-relation 40918. Up to 7379 conditions per place. [2024-06-21 20:17:09,122 INFO L140 encePairwiseOnDemand]: 39/49 looper letters, 91 selfloop transitions, 55 changer transitions 0/158 dead transitions. [2024-06-21 20:17:09,122 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 110 places, 158 transitions, 1806 flow [2024-06-21 20:17:09,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 20:17:09,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 20:17:09,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 188 transitions. [2024-06-21 20:17:09,125 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6394557823129252 [2024-06-21 20:17:09,125 INFO L175 Difference]: Start difference. First operand has 105 places, 124 transitions, 1314 flow. Second operand 6 states and 188 transitions. [2024-06-21 20:17:09,125 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 110 places, 158 transitions, 1806 flow [2024-06-21 20:17:09,259 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 108 places, 158 transitions, 1707 flow, removed 27 selfloop flow, removed 2 redundant places. [2024-06-21 20:17:09,261 INFO L231 Difference]: Finished difference. Result has 109 places, 128 transitions, 1396 flow [2024-06-21 20:17:09,261 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=1219, PETRI_DIFFERENCE_MINUEND_PLACES=103, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=124, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1396, PETRI_PLACES=109, PETRI_TRANSITIONS=128} [2024-06-21 20:17:09,262 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 57 predicate places. [2024-06-21 20:17:09,262 INFO L495 AbstractCegarLoop]: Abstraction has has 109 places, 128 transitions, 1396 flow [2024-06-21 20:17:09,262 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 20.0) internal successors, (140), 7 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:17:09,262 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:17:09,262 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:17:09,262 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-06-21 20:17:09,263 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 20:17:09,263 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:17:09,263 INFO L85 PathProgramCache]: Analyzing trace with hash 1521738569, now seen corresponding path program 4 times [2024-06-21 20:17:09,263 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:17:09,263 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [507968590] [2024-06-21 20:17:09,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:17:09,264 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:17:09,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:17:09,381 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:17:09,382 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:17:09,382 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [507968590] [2024-06-21 20:17:09,382 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [507968590] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:17:09,382 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:17:09,382 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 20:17:09,382 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [634882315] [2024-06-21 20:17:09,382 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:17:09,383 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 20:17:09,384 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:17:09,385 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 20:17:09,385 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-21 20:17:09,422 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 49 [2024-06-21 20:17:09,422 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 109 places, 128 transitions, 1396 flow. Second operand has 7 states, 7 states have (on average 20.0) internal successors, (140), 7 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:17:09,422 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:17:09,422 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 49 [2024-06-21 20:17:09,422 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:17:10,095 INFO L124 PetriNetUnfolderBase]: 5440/8168 cut-off events. [2024-06-21 20:17:10,095 INFO L125 PetriNetUnfolderBase]: For 77188/77756 co-relation queries the response was YES. [2024-06-21 20:17:10,127 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41051 conditions, 8168 events. 5440/8168 cut-off events. For 77188/77756 co-relation queries the response was YES. Maximal size of possible extension queue 425. Compared 49562 event pairs, 1743 based on Foata normal form. 46/8088 useless extension candidates. Maximal degree in co-relation 41003. Up to 7376 conditions per place. [2024-06-21 20:17:10,158 INFO L140 encePairwiseOnDemand]: 39/49 looper letters, 101 selfloop transitions, 41 changer transitions 0/154 dead transitions. [2024-06-21 20:17:10,158 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 113 places, 154 transitions, 1750 flow [2024-06-21 20:17:10,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-21 20:17:10,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-21 20:17:10,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 162 transitions. [2024-06-21 20:17:10,159 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6612244897959184 [2024-06-21 20:17:10,160 INFO L175 Difference]: Start difference. First operand has 109 places, 128 transitions, 1396 flow. Second operand 5 states and 162 transitions. [2024-06-21 20:17:10,160 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 113 places, 154 transitions, 1750 flow [2024-06-21 20:17:10,333 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 110 places, 154 transitions, 1595 flow, removed 39 selfloop flow, removed 3 redundant places. [2024-06-21 20:17:10,335 INFO L231 Difference]: Finished difference. Result has 111 places, 128 transitions, 1337 flow [2024-06-21 20:17:10,336 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=1241, PETRI_DIFFERENCE_MINUEND_PLACES=106, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=128, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=87, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1337, PETRI_PLACES=111, PETRI_TRANSITIONS=128} [2024-06-21 20:17:10,336 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 59 predicate places. [2024-06-21 20:17:10,336 INFO L495 AbstractCegarLoop]: Abstraction has has 111 places, 128 transitions, 1337 flow [2024-06-21 20:17:10,336 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 20.0) internal successors, (140), 7 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:17:10,336 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:17:10,337 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:17:10,337 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-06-21 20:17:10,337 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 20:17:10,337 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:17:10,337 INFO L85 PathProgramCache]: Analyzing trace with hash 923773174, now seen corresponding path program 1 times [2024-06-21 20:17:10,337 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:17:10,338 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1809983439] [2024-06-21 20:17:10,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:17:10,338 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:17:10,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:17:10,435 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:17:10,435 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:17:10,435 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1809983439] [2024-06-21 20:17:10,435 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1809983439] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:17:10,436 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:17:10,436 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-21 20:17:10,436 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1703193034] [2024-06-21 20:17:10,436 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:17:10,437 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-21 20:17:10,437 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:17:10,437 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-21 20:17:10,437 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-06-21 20:17:10,464 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 49 [2024-06-21 20:17:10,464 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 111 places, 128 transitions, 1337 flow. Second operand has 5 states, 5 states have (on average 22.0) internal successors, (110), 5 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:17:10,464 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:17:10,464 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 49 [2024-06-21 20:17:10,464 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:17:11,133 INFO L124 PetriNetUnfolderBase]: 5397/8145 cut-off events. [2024-06-21 20:17:11,133 INFO L125 PetriNetUnfolderBase]: For 88152/88271 co-relation queries the response was YES. [2024-06-21 20:17:11,166 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39954 conditions, 8145 events. 5397/8145 cut-off events. For 88152/88271 co-relation queries the response was YES. Maximal size of possible extension queue 410. Compared 50157 event pairs, 1842 based on Foata normal form. 16/7976 useless extension candidates. Maximal degree in co-relation 39905. Up to 7236 conditions per place. [2024-06-21 20:17:11,197 INFO L140 encePairwiseOnDemand]: 40/49 looper letters, 87 selfloop transitions, 27 changer transitions 0/147 dead transitions. [2024-06-21 20:17:11,197 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 114 places, 147 transitions, 1645 flow [2024-06-21 20:17:11,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-21 20:17:11,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-21 20:17:11,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 126 transitions. [2024-06-21 20:17:11,198 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6428571428571429 [2024-06-21 20:17:11,198 INFO L175 Difference]: Start difference. First operand has 111 places, 128 transitions, 1337 flow. Second operand 4 states and 126 transitions. [2024-06-21 20:17:11,198 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 114 places, 147 transitions, 1645 flow [2024-06-21 20:17:11,326 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 109 places, 147 transitions, 1530 flow, removed 0 selfloop flow, removed 5 redundant places. [2024-06-21 20:17:11,327 INFO L231 Difference]: Finished difference. Result has 110 places, 134 transitions, 1350 flow [2024-06-21 20:17:11,328 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=1222, PETRI_DIFFERENCE_MINUEND_PLACES=106, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=128, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=101, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=1350, PETRI_PLACES=110, PETRI_TRANSITIONS=134} [2024-06-21 20:17:11,328 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 58 predicate places. [2024-06-21 20:17:11,328 INFO L495 AbstractCegarLoop]: Abstraction has has 110 places, 134 transitions, 1350 flow [2024-06-21 20:17:11,329 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 22.0) internal successors, (110), 5 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:17:11,329 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:17:11,329 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:17:11,329 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-06-21 20:17:11,329 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 20:17:11,329 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:17:11,329 INFO L85 PathProgramCache]: Analyzing trace with hash 635343158, now seen corresponding path program 2 times [2024-06-21 20:17:11,330 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:17:11,330 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1550926511] [2024-06-21 20:17:11,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:17:11,330 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:17:11,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:17:11,481 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:17:11,481 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:17:11,481 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1550926511] [2024-06-21 20:17:11,481 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1550926511] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:17:11,481 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:17:11,481 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-21 20:17:11,482 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1606329156] [2024-06-21 20:17:11,482 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:17:11,482 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-21 20:17:11,482 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:17:11,482 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-21 20:17:11,483 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-21 20:17:11,507 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 49 [2024-06-21 20:17:11,508 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 110 places, 134 transitions, 1350 flow. Second operand has 5 states, 5 states have (on average 22.0) internal successors, (110), 5 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:17:11,508 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:17:11,508 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 49 [2024-06-21 20:17:11,508 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:17:12,135 INFO L124 PetriNetUnfolderBase]: 5381/8142 cut-off events. [2024-06-21 20:17:12,136 INFO L125 PetriNetUnfolderBase]: For 94399/94518 co-relation queries the response was YES. [2024-06-21 20:17:12,170 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42156 conditions, 8142 events. 5381/8142 cut-off events. For 94399/94518 co-relation queries the response was YES. Maximal size of possible extension queue 411. Compared 50254 event pairs, 1830 based on Foata normal form. 13/7973 useless extension candidates. Maximal degree in co-relation 42106. Up to 7255 conditions per place. [2024-06-21 20:17:12,203 INFO L140 encePairwiseOnDemand]: 41/49 looper letters, 97 selfloop transitions, 29 changer transitions 0/159 dead transitions. [2024-06-21 20:17:12,203 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 114 places, 159 transitions, 1777 flow [2024-06-21 20:17:12,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-21 20:17:12,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-21 20:17:12,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 148 transitions. [2024-06-21 20:17:12,204 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6040816326530613 [2024-06-21 20:17:12,204 INFO L175 Difference]: Start difference. First operand has 110 places, 134 transitions, 1350 flow. Second operand 5 states and 148 transitions. [2024-06-21 20:17:12,204 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 114 places, 159 transitions, 1777 flow [2024-06-21 20:17:12,378 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 112 places, 159 transitions, 1686 flow, removed 21 selfloop flow, removed 2 redundant places. [2024-06-21 20:17:12,380 INFO L231 Difference]: Finished difference. Result has 115 places, 147 transitions, 1524 flow [2024-06-21 20:17:12,381 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=1286, PETRI_DIFFERENCE_MINUEND_PLACES=108, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=134, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=106, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1524, PETRI_PLACES=115, PETRI_TRANSITIONS=147} [2024-06-21 20:17:12,381 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 63 predicate places. [2024-06-21 20:17:12,381 INFO L495 AbstractCegarLoop]: Abstraction has has 115 places, 147 transitions, 1524 flow [2024-06-21 20:17:12,381 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 22.0) internal successors, (110), 5 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:17:12,382 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:17:12,382 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:17:12,382 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-06-21 20:17:12,382 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 20:17:12,382 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:17:12,382 INFO L85 PathProgramCache]: Analyzing trace with hash 624873590, now seen corresponding path program 1 times [2024-06-21 20:17:12,382 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:17:12,383 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1623969605] [2024-06-21 20:17:12,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:17:12,383 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:17:12,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:17:12,466 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:17:12,466 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:17:12,466 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1623969605] [2024-06-21 20:17:12,466 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1623969605] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:17:12,467 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:17:12,467 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-21 20:17:12,467 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1742770858] [2024-06-21 20:17:12,467 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:17:12,467 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-21 20:17:12,467 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:17:12,468 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-21 20:17:12,468 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-21 20:17:12,497 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 49 [2024-06-21 20:17:12,498 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 115 places, 147 transitions, 1524 flow. Second operand has 5 states, 5 states have (on average 20.0) internal successors, (100), 5 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:17:12,498 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:17:12,498 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 49 [2024-06-21 20:17:12,498 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:17:13,319 INFO L124 PetriNetUnfolderBase]: 5943/8874 cut-off events. [2024-06-21 20:17:13,320 INFO L125 PetriNetUnfolderBase]: For 93352/93352 co-relation queries the response was YES. [2024-06-21 20:17:13,350 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46602 conditions, 8874 events. 5943/8874 cut-off events. For 93352/93352 co-relation queries the response was YES. Maximal size of possible extension queue 413. Compared 52806 event pairs, 1941 based on Foata normal form. 1/8871 useless extension candidates. Maximal degree in co-relation 46549. Up to 8299 conditions per place. [2024-06-21 20:17:13,380 INFO L140 encePairwiseOnDemand]: 41/49 looper letters, 155 selfloop transitions, 19 changer transitions 0/183 dead transitions. [2024-06-21 20:17:13,381 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 119 places, 183 transitions, 2151 flow [2024-06-21 20:17:13,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-21 20:17:13,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-21 20:17:13,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 147 transitions. [2024-06-21 20:17:13,382 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6 [2024-06-21 20:17:13,382 INFO L175 Difference]: Start difference. First operand has 115 places, 147 transitions, 1524 flow. Second operand 5 states and 147 transitions. [2024-06-21 20:17:13,382 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 119 places, 183 transitions, 2151 flow [2024-06-21 20:17:13,616 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 119 places, 183 transitions, 2109 flow, removed 21 selfloop flow, removed 0 redundant places. [2024-06-21 20:17:13,619 INFO L231 Difference]: Finished difference. Result has 122 places, 164 transitions, 1763 flow [2024-06-21 20:17:13,619 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=1482, PETRI_DIFFERENCE_MINUEND_PLACES=115, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=147, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=133, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1763, PETRI_PLACES=122, PETRI_TRANSITIONS=164} [2024-06-21 20:17:13,619 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 70 predicate places. [2024-06-21 20:17:13,619 INFO L495 AbstractCegarLoop]: Abstraction has has 122 places, 164 transitions, 1763 flow [2024-06-21 20:17:13,620 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 20.0) internal successors, (100), 5 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:17:13,620 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:17:13,620 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:17:13,620 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-06-21 20:17:13,620 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 20:17:13,620 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:17:13,620 INFO L85 PathProgramCache]: Analyzing trace with hash -974949610, now seen corresponding path program 2 times [2024-06-21 20:17:13,621 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:17:13,621 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2059248441] [2024-06-21 20:17:13,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:17:13,621 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:17:13,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:17:13,705 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:17:13,705 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:17:13,706 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2059248441] [2024-06-21 20:17:13,706 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2059248441] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:17:13,706 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:17:13,706 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-21 20:17:13,706 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1080813465] [2024-06-21 20:17:13,706 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:17:13,706 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-21 20:17:13,707 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:17:13,707 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-21 20:17:13,707 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-21 20:17:13,733 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 49 [2024-06-21 20:17:13,734 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 122 places, 164 transitions, 1763 flow. Second operand has 5 states, 5 states have (on average 20.0) internal successors, (100), 5 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:17:13,734 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:17:13,734 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 49 [2024-06-21 20:17:13,734 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:17:14,484 INFO L124 PetriNetUnfolderBase]: 5939/8865 cut-off events. [2024-06-21 20:17:14,484 INFO L125 PetriNetUnfolderBase]: For 103267/103267 co-relation queries the response was YES. [2024-06-21 20:17:14,525 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48284 conditions, 8865 events. 5939/8865 cut-off events. For 103267/103267 co-relation queries the response was YES. Maximal size of possible extension queue 413. Compared 52839 event pairs, 1947 based on Foata normal form. 1/8861 useless extension candidates. Maximal degree in co-relation 48226. Up to 8295 conditions per place. [2024-06-21 20:17:14,562 INFO L140 encePairwiseOnDemand]: 41/49 looper letters, 148 selfloop transitions, 20 changer transitions 0/177 dead transitions. [2024-06-21 20:17:14,562 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 126 places, 177 transitions, 2138 flow [2024-06-21 20:17:14,562 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-21 20:17:14,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-21 20:17:14,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 140 transitions. [2024-06-21 20:17:14,563 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5714285714285714 [2024-06-21 20:17:14,563 INFO L175 Difference]: Start difference. First operand has 122 places, 164 transitions, 1763 flow. Second operand 5 states and 140 transitions. [2024-06-21 20:17:14,563 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 126 places, 177 transitions, 2138 flow [2024-06-21 20:17:14,865 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 126 places, 177 transitions, 2074 flow, removed 32 selfloop flow, removed 0 redundant places. [2024-06-21 20:17:14,868 INFO L231 Difference]: Finished difference. Result has 127 places, 165 transitions, 1755 flow [2024-06-21 20:17:14,868 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=1703, PETRI_DIFFERENCE_MINUEND_PLACES=122, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=164, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=145, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1755, PETRI_PLACES=127, PETRI_TRANSITIONS=165} [2024-06-21 20:17:14,868 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 75 predicate places. [2024-06-21 20:17:14,869 INFO L495 AbstractCegarLoop]: Abstraction has has 127 places, 165 transitions, 1755 flow [2024-06-21 20:17:14,869 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 20.0) internal successors, (100), 5 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:17:14,869 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:17:14,869 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:17:14,869 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-06-21 20:17:14,869 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 20:17:14,870 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:17:14,870 INFO L85 PathProgramCache]: Analyzing trace with hash 2048349136, now seen corresponding path program 1 times [2024-06-21 20:17:14,870 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:17:14,870 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1030933377] [2024-06-21 20:17:14,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:17:14,870 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:17:14,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:17:14,964 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:17:14,964 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:17:14,964 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1030933377] [2024-06-21 20:17:14,964 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1030933377] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:17:14,964 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:17:14,965 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-21 20:17:14,965 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1195182862] [2024-06-21 20:17:14,965 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:17:14,965 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-21 20:17:14,965 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:17:14,966 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-21 20:17:14,966 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-06-21 20:17:14,998 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 49 [2024-06-21 20:17:14,999 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 127 places, 165 transitions, 1755 flow. Second operand has 5 states, 5 states have (on average 22.0) internal successors, (110), 5 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:17:14,999 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:17:14,999 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 49 [2024-06-21 20:17:14,999 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:17:15,814 INFO L124 PetriNetUnfolderBase]: 5414/8239 cut-off events. [2024-06-21 20:17:15,814 INFO L125 PetriNetUnfolderBase]: For 108088/108097 co-relation queries the response was YES. [2024-06-21 20:17:15,848 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44974 conditions, 8239 events. 5414/8239 cut-off events. For 108088/108097 co-relation queries the response was YES. Maximal size of possible extension queue 411. Compared 50848 event pairs, 1875 based on Foata normal form. 13/8110 useless extension candidates. Maximal degree in co-relation 44913. Up to 7271 conditions per place. [2024-06-21 20:17:15,879 INFO L140 encePairwiseOnDemand]: 42/49 looper letters, 125 selfloop transitions, 18 changer transitions 0/181 dead transitions. [2024-06-21 20:17:15,879 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 131 places, 181 transitions, 2099 flow [2024-06-21 20:17:15,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-21 20:17:15,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-21 20:17:15,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 146 transitions. [2024-06-21 20:17:15,881 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5959183673469388 [2024-06-21 20:17:15,881 INFO L175 Difference]: Start difference. First operand has 127 places, 165 transitions, 1755 flow. Second operand 5 states and 146 transitions. [2024-06-21 20:17:15,881 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 131 places, 181 transitions, 2099 flow [2024-06-21 20:17:16,115 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 130 places, 181 transitions, 2064 flow, removed 9 selfloop flow, removed 1 redundant places. [2024-06-21 20:17:16,117 INFO L231 Difference]: Finished difference. Result has 131 places, 168 transitions, 1795 flow [2024-06-21 20:17:16,118 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=1720, PETRI_DIFFERENCE_MINUEND_PLACES=126, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=165, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=147, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1795, PETRI_PLACES=131, PETRI_TRANSITIONS=168} [2024-06-21 20:17:16,118 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 79 predicate places. [2024-06-21 20:17:16,118 INFO L495 AbstractCegarLoop]: Abstraction has has 131 places, 168 transitions, 1795 flow [2024-06-21 20:17:16,118 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 22.0) internal successors, (110), 5 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:17:16,118 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:17:16,119 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:17:16,119 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-06-21 20:17:16,119 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 20:17:16,119 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:17:16,119 INFO L85 PathProgramCache]: Analyzing trace with hash 1511358293, now seen corresponding path program 1 times [2024-06-21 20:17:16,119 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:17:16,120 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [257553884] [2024-06-21 20:17:16,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:17:16,120 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:17:16,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:17:16,263 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:17:16,263 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:17:16,264 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [257553884] [2024-06-21 20:17:16,264 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [257553884] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:17:16,264 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:17:16,264 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 20:17:16,265 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1706227401] [2024-06-21 20:17:16,265 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:17:16,265 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 20:17:16,266 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:17:16,266 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 20:17:16,266 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-21 20:17:16,301 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 49 [2024-06-21 20:17:16,301 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 131 places, 168 transitions, 1795 flow. Second operand has 6 states, 6 states have (on average 20.666666666666668) internal successors, (124), 6 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:17:16,302 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:17:16,302 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 49 [2024-06-21 20:17:16,302 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:17:17,074 INFO L124 PetriNetUnfolderBase]: 5639/8539 cut-off events. [2024-06-21 20:17:17,074 INFO L125 PetriNetUnfolderBase]: For 114476/114485 co-relation queries the response was YES. [2024-06-21 20:17:17,119 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47729 conditions, 8539 events. 5639/8539 cut-off events. For 114476/114485 co-relation queries the response was YES. Maximal size of possible extension queue 411. Compared 51993 event pairs, 1938 based on Foata normal form. 7/8503 useless extension candidates. Maximal degree in co-relation 47666. Up to 7745 conditions per place. [2024-06-21 20:17:17,156 INFO L140 encePairwiseOnDemand]: 41/49 looper letters, 144 selfloop transitions, 26 changer transitions 0/191 dead transitions. [2024-06-21 20:17:17,156 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 135 places, 191 transitions, 2274 flow [2024-06-21 20:17:17,157 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-21 20:17:17,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-21 20:17:17,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 146 transitions. [2024-06-21 20:17:17,157 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5959183673469388 [2024-06-21 20:17:17,157 INFO L175 Difference]: Start difference. First operand has 131 places, 168 transitions, 1795 flow. Second operand 5 states and 146 transitions. [2024-06-21 20:17:17,158 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 135 places, 191 transitions, 2274 flow [2024-06-21 20:17:17,489 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 132 places, 191 transitions, 2225 flow, removed 9 selfloop flow, removed 3 redundant places. [2024-06-21 20:17:17,491 INFO L231 Difference]: Finished difference. Result has 135 places, 179 transitions, 1959 flow [2024-06-21 20:17:17,492 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=1746, PETRI_DIFFERENCE_MINUEND_PLACES=128, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=168, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=143, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1959, PETRI_PLACES=135, PETRI_TRANSITIONS=179} [2024-06-21 20:17:17,492 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 83 predicate places. [2024-06-21 20:17:17,492 INFO L495 AbstractCegarLoop]: Abstraction has has 135 places, 179 transitions, 1959 flow [2024-06-21 20:17:17,492 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 20.666666666666668) internal successors, (124), 6 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:17:17,492 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:17:17,492 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:17:17,493 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-06-21 20:17:17,493 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 20:17:17,493 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:17:17,493 INFO L85 PathProgramCache]: Analyzing trace with hash 860020480, now seen corresponding path program 1 times [2024-06-21 20:17:17,493 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:17:17,493 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1102163058] [2024-06-21 20:17:17,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:17:17,494 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:17:17,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:17:17,628 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:17:17,628 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:17:17,629 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1102163058] [2024-06-21 20:17:17,629 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1102163058] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:17:17,629 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:17:17,629 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:17:17,629 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2027197577] [2024-06-21 20:17:17,629 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:17:17,629 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:17:17,630 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:17:17,630 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:17:17,630 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:17:17,713 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 49 [2024-06-21 20:17:17,714 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 135 places, 179 transitions, 1959 flow. Second operand has 8 states, 8 states have (on average 19.875) internal successors, (159), 8 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:17:17,714 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:17:17,714 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 49 [2024-06-21 20:17:17,714 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:17:18,924 INFO L124 PetriNetUnfolderBase]: 6497/9982 cut-off events. [2024-06-21 20:17:18,924 INFO L125 PetriNetUnfolderBase]: For 173565/174407 co-relation queries the response was YES. [2024-06-21 20:17:18,986 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60095 conditions, 9982 events. 6497/9982 cut-off events. For 173565/174407 co-relation queries the response was YES. Maximal size of possible extension queue 543. Compared 64552 event pairs, 1263 based on Foata normal form. 138/9922 useless extension candidates. Maximal degree in co-relation 60029. Up to 5168 conditions per place. [2024-06-21 20:17:19,042 INFO L140 encePairwiseOnDemand]: 39/49 looper letters, 157 selfloop transitions, 70 changer transitions 0/243 dead transitions. [2024-06-21 20:17:19,042 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 141 places, 243 transitions, 2933 flow [2024-06-21 20:17:19,043 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 20:17:19,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 20:17:19,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 235 transitions. [2024-06-21 20:17:19,044 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.685131195335277 [2024-06-21 20:17:19,044 INFO L175 Difference]: Start difference. First operand has 135 places, 179 transitions, 1959 flow. Second operand 7 states and 235 transitions. [2024-06-21 20:17:19,044 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 141 places, 243 transitions, 2933 flow [2024-06-21 20:17:19,558 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 141 places, 243 transitions, 2891 flow, removed 21 selfloop flow, removed 0 redundant places. [2024-06-21 20:17:19,561 INFO L231 Difference]: Finished difference. Result has 143 places, 184 transitions, 2199 flow [2024-06-21 20:17:19,561 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=1917, PETRI_DIFFERENCE_MINUEND_PLACES=135, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=179, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=66, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=111, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2199, PETRI_PLACES=143, PETRI_TRANSITIONS=184} [2024-06-21 20:17:19,562 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 91 predicate places. [2024-06-21 20:17:19,562 INFO L495 AbstractCegarLoop]: Abstraction has has 143 places, 184 transitions, 2199 flow [2024-06-21 20:17:19,562 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 19.875) internal successors, (159), 8 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:17:19,562 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:17:19,562 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:17:19,562 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-06-21 20:17:19,562 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 20:17:19,563 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:17:19,563 INFO L85 PathProgramCache]: Analyzing trace with hash -1542602202, now seen corresponding path program 2 times [2024-06-21 20:17:19,563 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:17:19,563 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [546453918] [2024-06-21 20:17:19,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:17:19,564 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:17:19,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:17:19,729 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:17:19,730 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:17:19,730 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [546453918] [2024-06-21 20:17:19,730 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [546453918] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:17:19,730 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:17:19,730 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:17:19,731 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1600576802] [2024-06-21 20:17:19,731 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:17:19,731 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:17:19,731 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:17:19,731 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:17:19,732 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:17:19,800 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 49 [2024-06-21 20:17:19,800 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 143 places, 184 transitions, 2199 flow. Second operand has 8 states, 8 states have (on average 19.875) internal successors, (159), 8 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:17:19,800 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:17:19,801 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 49 [2024-06-21 20:17:19,801 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:17:21,071 INFO L124 PetriNetUnfolderBase]: 6392/9844 cut-off events. [2024-06-21 20:17:21,071 INFO L125 PetriNetUnfolderBase]: For 179022/179838 co-relation queries the response was YES. [2024-06-21 20:17:21,129 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60736 conditions, 9844 events. 6392/9844 cut-off events. For 179022/179838 co-relation queries the response was YES. Maximal size of possible extension queue 532. Compared 63385 event pairs, 1611 based on Foata normal form. 56/9680 useless extension candidates. Maximal degree in co-relation 60666. Up to 8191 conditions per place. [2024-06-21 20:17:21,183 INFO L140 encePairwiseOnDemand]: 41/49 looper letters, 173 selfloop transitions, 33 changer transitions 0/222 dead transitions. [2024-06-21 20:17:21,183 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 148 places, 222 transitions, 2779 flow [2024-06-21 20:17:21,184 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 20:17:21,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 20:17:21,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 189 transitions. [2024-06-21 20:17:21,185 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6428571428571429 [2024-06-21 20:17:21,185 INFO L175 Difference]: Start difference. First operand has 143 places, 184 transitions, 2199 flow. Second operand 6 states and 189 transitions. [2024-06-21 20:17:21,185 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 148 places, 222 transitions, 2779 flow [2024-06-21 20:17:21,790 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 146 places, 222 transitions, 2699 flow, removed 11 selfloop flow, removed 2 redundant places. [2024-06-21 20:17:21,792 INFO L231 Difference]: Finished difference. Result has 147 places, 184 transitions, 2191 flow [2024-06-21 20:17:21,793 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=2119, PETRI_DIFFERENCE_MINUEND_PLACES=141, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=184, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=151, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2191, PETRI_PLACES=147, PETRI_TRANSITIONS=184} [2024-06-21 20:17:21,793 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 95 predicate places. [2024-06-21 20:17:21,793 INFO L495 AbstractCegarLoop]: Abstraction has has 147 places, 184 transitions, 2191 flow [2024-06-21 20:17:21,793 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 19.875) internal successors, (159), 8 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:17:21,793 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:17:21,793 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:17:21,794 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-06-21 20:17:21,794 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 20:17:21,794 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:17:21,794 INFO L85 PathProgramCache]: Analyzing trace with hash 354250122, now seen corresponding path program 3 times [2024-06-21 20:17:21,794 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:17:21,795 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [885169335] [2024-06-21 20:17:21,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:17:21,795 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:17:21,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:17:21,938 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:17:21,938 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:17:21,938 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [885169335] [2024-06-21 20:17:21,938 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [885169335] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:17:21,938 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:17:21,938 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:17:21,939 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [534148763] [2024-06-21 20:17:21,939 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:17:21,939 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:17:21,939 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:17:21,940 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:17:21,940 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:17:22,027 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 49 [2024-06-21 20:17:22,028 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 147 places, 184 transitions, 2191 flow. Second operand has 8 states, 8 states have (on average 19.875) internal successors, (159), 8 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:17:22,028 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:17:22,028 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 49 [2024-06-21 20:17:22,028 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:17:23,296 INFO L124 PetriNetUnfolderBase]: 6713/10283 cut-off events. [2024-06-21 20:17:23,296 INFO L125 PetriNetUnfolderBase]: For 200897/201725 co-relation queries the response was YES. [2024-06-21 20:17:23,379 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63932 conditions, 10283 events. 6713/10283 cut-off events. For 200897/201725 co-relation queries the response was YES. Maximal size of possible extension queue 577. Compared 66649 event pairs, 1958 based on Foata normal form. 140/10200 useless extension candidates. Maximal degree in co-relation 63860. Up to 6714 conditions per place. [2024-06-21 20:17:23,430 INFO L140 encePairwiseOnDemand]: 39/49 looper letters, 151 selfloop transitions, 63 changer transitions 0/230 dead transitions. [2024-06-21 20:17:23,431 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 152 places, 230 transitions, 2948 flow [2024-06-21 20:17:23,431 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 20:17:23,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 20:17:23,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 200 transitions. [2024-06-21 20:17:23,432 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6802721088435374 [2024-06-21 20:17:23,432 INFO L175 Difference]: Start difference. First operand has 147 places, 184 transitions, 2191 flow. Second operand 6 states and 200 transitions. [2024-06-21 20:17:23,432 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 152 places, 230 transitions, 2948 flow [2024-06-21 20:17:24,076 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 148 places, 230 transitions, 2874 flow, removed 3 selfloop flow, removed 4 redundant places. [2024-06-21 20:17:24,079 INFO L231 Difference]: Finished difference. Result has 149 places, 185 transitions, 2281 flow [2024-06-21 20:17:24,079 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=2117, PETRI_DIFFERENCE_MINUEND_PLACES=143, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=184, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=62, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=122, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2281, PETRI_PLACES=149, PETRI_TRANSITIONS=185} [2024-06-21 20:17:24,080 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 97 predicate places. [2024-06-21 20:17:24,080 INFO L495 AbstractCegarLoop]: Abstraction has has 149 places, 185 transitions, 2281 flow [2024-06-21 20:17:24,080 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 19.875) internal successors, (159), 8 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:17:24,080 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:17:24,080 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:17:24,080 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2024-06-21 20:17:24,081 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 20:17:24,081 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:17:24,081 INFO L85 PathProgramCache]: Analyzing trace with hash 1742362790, now seen corresponding path program 4 times [2024-06-21 20:17:24,081 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:17:24,081 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1097098130] [2024-06-21 20:17:24,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:17:24,081 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:17:24,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:17:24,220 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:17:24,220 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:17:24,220 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1097098130] [2024-06-21 20:17:24,220 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1097098130] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:17:24,220 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:17:24,220 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:17:24,221 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [519246742] [2024-06-21 20:17:24,221 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:17:24,221 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:17:24,221 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:17:24,221 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:17:24,222 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:17:24,315 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 49 [2024-06-21 20:17:24,316 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 149 places, 185 transitions, 2281 flow. Second operand has 8 states, 8 states have (on average 19.875) internal successors, (159), 8 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:17:24,316 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:17:24,316 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 49 [2024-06-21 20:17:24,316 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:17:25,472 INFO L124 PetriNetUnfolderBase]: 6561/10073 cut-off events. [2024-06-21 20:17:25,472 INFO L125 PetriNetUnfolderBase]: For 200888/201708 co-relation queries the response was YES. [2024-06-21 20:17:25,540 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62048 conditions, 10073 events. 6561/10073 cut-off events. For 200888/201708 co-relation queries the response was YES. Maximal size of possible extension queue 561. Compared 65107 event pairs, 2172 based on Foata normal form. 144/9992 useless extension candidates. Maximal degree in co-relation 61975. Up to 8206 conditions per place. [2024-06-21 20:17:25,588 INFO L140 encePairwiseOnDemand]: 39/49 looper letters, 148 selfloop transitions, 55 changer transitions 0/219 dead transitions. [2024-06-21 20:17:25,588 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 154 places, 219 transitions, 2839 flow [2024-06-21 20:17:25,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 20:17:25,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 20:17:25,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 191 transitions. [2024-06-21 20:17:25,589 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6496598639455783 [2024-06-21 20:17:25,589 INFO L175 Difference]: Start difference. First operand has 149 places, 185 transitions, 2281 flow. Second operand 6 states and 191 transitions. [2024-06-21 20:17:25,589 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 154 places, 219 transitions, 2839 flow [2024-06-21 20:17:26,224 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 149 places, 219 transitions, 2683 flow, removed 10 selfloop flow, removed 5 redundant places. [2024-06-21 20:17:26,226 INFO L231 Difference]: Finished difference. Result has 150 places, 185 transitions, 2247 flow [2024-06-21 20:17:26,227 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=2125, PETRI_DIFFERENCE_MINUEND_PLACES=144, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=185, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=55, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=130, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2247, PETRI_PLACES=150, PETRI_TRANSITIONS=185} [2024-06-21 20:17:26,227 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 98 predicate places. [2024-06-21 20:17:26,227 INFO L495 AbstractCegarLoop]: Abstraction has has 150 places, 185 transitions, 2247 flow [2024-06-21 20:17:26,227 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 19.875) internal successors, (159), 8 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:17:26,227 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:17:26,228 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:17:26,228 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2024-06-21 20:17:26,228 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 20:17:26,228 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:17:26,228 INFO L85 PathProgramCache]: Analyzing trace with hash 780887688, now seen corresponding path program 5 times [2024-06-21 20:17:26,228 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:17:26,228 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1194951187] [2024-06-21 20:17:26,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:17:26,229 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:17:26,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:17:26,356 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:17:26,357 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:17:26,357 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1194951187] [2024-06-21 20:17:26,357 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1194951187] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:17:26,357 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:17:26,357 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:17:26,357 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1831836713] [2024-06-21 20:17:26,358 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:17:26,358 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:17:26,358 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:17:26,358 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:17:26,358 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:17:26,445 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 49 [2024-06-21 20:17:26,446 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 150 places, 185 transitions, 2247 flow. Second operand has 8 states, 8 states have (on average 19.875) internal successors, (159), 8 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:17:26,446 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:17:26,446 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 49 [2024-06-21 20:17:26,446 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:17:27,680 INFO L124 PetriNetUnfolderBase]: 7231/11115 cut-off events. [2024-06-21 20:17:27,680 INFO L125 PetriNetUnfolderBase]: For 219497/220477 co-relation queries the response was YES. [2024-06-21 20:17:27,760 INFO L83 FinitePrefix]: Finished finitePrefix Result has 68410 conditions, 11115 events. 7231/11115 cut-off events. For 219497/220477 co-relation queries the response was YES. Maximal size of possible extension queue 646. Compared 73941 event pairs, 2382 based on Foata normal form. 211/11062 useless extension candidates. Maximal degree in co-relation 68337. Up to 8656 conditions per place. [2024-06-21 20:17:27,813 INFO L140 encePairwiseOnDemand]: 39/49 looper letters, 153 selfloop transitions, 68 changer transitions 0/237 dead transitions. [2024-06-21 20:17:27,814 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 156 places, 237 transitions, 3043 flow [2024-06-21 20:17:27,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 20:17:27,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 20:17:27,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 226 transitions. [2024-06-21 20:17:27,815 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6588921282798834 [2024-06-21 20:17:27,815 INFO L175 Difference]: Start difference. First operand has 150 places, 185 transitions, 2247 flow. Second operand 7 states and 226 transitions. [2024-06-21 20:17:27,815 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 156 places, 237 transitions, 3043 flow [2024-06-21 20:17:28,425 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 150 places, 237 transitions, 2900 flow, removed 6 selfloop flow, removed 6 redundant places. [2024-06-21 20:17:28,427 INFO L231 Difference]: Finished difference. Result has 151 places, 187 transitions, 2308 flow [2024-06-21 20:17:28,428 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=2108, PETRI_DIFFERENCE_MINUEND_PLACES=144, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=185, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=67, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=118, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2308, PETRI_PLACES=151, PETRI_TRANSITIONS=187} [2024-06-21 20:17:28,428 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 99 predicate places. [2024-06-21 20:17:28,429 INFO L495 AbstractCegarLoop]: Abstraction has has 151 places, 187 transitions, 2308 flow [2024-06-21 20:17:28,429 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 19.875) internal successors, (159), 8 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:17:28,429 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:17:28,429 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:17:28,429 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2024-06-21 20:17:28,429 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 20:17:28,430 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:17:28,430 INFO L85 PathProgramCache]: Analyzing trace with hash 788506248, now seen corresponding path program 6 times [2024-06-21 20:17:28,430 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:17:28,430 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1729718009] [2024-06-21 20:17:28,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:17:28,431 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:17:28,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:17:28,563 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:17:28,564 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:17:28,564 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1729718009] [2024-06-21 20:17:28,564 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1729718009] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:17:28,564 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:17:28,564 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:17:28,564 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1850651842] [2024-06-21 20:17:28,564 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:17:28,565 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:17:28,565 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:17:28,565 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:17:28,565 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:17:28,623 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 49 [2024-06-21 20:17:28,624 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 151 places, 187 transitions, 2308 flow. Second operand has 8 states, 8 states have (on average 19.875) internal successors, (159), 8 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:17:28,624 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:17:28,624 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 49 [2024-06-21 20:17:28,624 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:17:29,952 INFO L124 PetriNetUnfolderBase]: 7522/11556 cut-off events. [2024-06-21 20:17:29,953 INFO L125 PetriNetUnfolderBase]: For 228128/229140 co-relation queries the response was YES. [2024-06-21 20:17:29,999 INFO L83 FinitePrefix]: Finished finitePrefix Result has 70903 conditions, 11556 events. 7522/11556 cut-off events. For 228128/229140 co-relation queries the response was YES. Maximal size of possible extension queue 688. Compared 77552 event pairs, 2612 based on Foata normal form. 209/11481 useless extension candidates. Maximal degree in co-relation 70830. Up to 9873 conditions per place. [2024-06-21 20:17:30,047 INFO L140 encePairwiseOnDemand]: 39/49 looper letters, 145 selfloop transitions, 66 changer transitions 0/227 dead transitions. [2024-06-21 20:17:30,047 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 157 places, 227 transitions, 2906 flow [2024-06-21 20:17:30,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 20:17:30,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 20:17:30,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 217 transitions. [2024-06-21 20:17:30,048 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6326530612244898 [2024-06-21 20:17:30,048 INFO L175 Difference]: Start difference. First operand has 151 places, 187 transitions, 2308 flow. Second operand 7 states and 217 transitions. [2024-06-21 20:17:30,048 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 157 places, 227 transitions, 2906 flow [2024-06-21 20:17:30,575 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 154 places, 227 transitions, 2804 flow, removed 13 selfloop flow, removed 3 redundant places. [2024-06-21 20:17:30,578 INFO L231 Difference]: Finished difference. Result has 155 places, 188 transitions, 2378 flow [2024-06-21 20:17:30,578 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=2212, PETRI_DIFFERENCE_MINUEND_PLACES=148, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=187, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=65, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=121, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2378, PETRI_PLACES=155, PETRI_TRANSITIONS=188} [2024-06-21 20:17:30,578 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 103 predicate places. [2024-06-21 20:17:30,578 INFO L495 AbstractCegarLoop]: Abstraction has has 155 places, 188 transitions, 2378 flow [2024-06-21 20:17:30,579 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 19.875) internal successors, (159), 8 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:17:30,579 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:17:30,579 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:17:30,579 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2024-06-21 20:17:30,579 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 20:17:30,579 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:17:30,579 INFO L85 PathProgramCache]: Analyzing trace with hash 1046794218, now seen corresponding path program 7 times [2024-06-21 20:17:30,580 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:17:30,580 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1944086299] [2024-06-21 20:17:30,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:17:30,580 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:17:30,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:17:30,707 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:17:30,708 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:17:30,708 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1944086299] [2024-06-21 20:17:30,708 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1944086299] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:17:30,708 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:17:30,708 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:17:30,708 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2140664544] [2024-06-21 20:17:30,708 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:17:30,709 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:17:30,709 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:17:30,710 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:17:30,710 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:17:30,779 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 49 [2024-06-21 20:17:30,780 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 155 places, 188 transitions, 2378 flow. Second operand has 8 states, 8 states have (on average 19.875) internal successors, (159), 8 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:17:30,780 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:17:30,780 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 49 [2024-06-21 20:17:30,780 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:17:32,104 INFO L124 PetriNetUnfolderBase]: 7890/12100 cut-off events. [2024-06-21 20:17:32,104 INFO L125 PetriNetUnfolderBase]: For 239734/240662 co-relation queries the response was YES. [2024-06-21 20:17:32,208 INFO L83 FinitePrefix]: Finished finitePrefix Result has 74143 conditions, 12100 events. 7890/12100 cut-off events. For 239734/240662 co-relation queries the response was YES. Maximal size of possible extension queue 725. Compared 81834 event pairs, 2709 based on Foata normal form. 164/11990 useless extension candidates. Maximal degree in co-relation 74068. Up to 10407 conditions per place. [2024-06-21 20:17:32,265 INFO L140 encePairwiseOnDemand]: 39/49 looper letters, 143 selfloop transitions, 67 changer transitions 0/226 dead transitions. [2024-06-21 20:17:32,265 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 161 places, 226 transitions, 2974 flow [2024-06-21 20:17:32,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 20:17:32,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 20:17:32,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 215 transitions. [2024-06-21 20:17:32,266 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6268221574344023 [2024-06-21 20:17:32,266 INFO L175 Difference]: Start difference. First operand has 155 places, 188 transitions, 2378 flow. Second operand 7 states and 215 transitions. [2024-06-21 20:17:32,266 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 161 places, 226 transitions, 2974 flow [2024-06-21 20:17:33,015 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 156 places, 226 transitions, 2838 flow, removed 4 selfloop flow, removed 5 redundant places. [2024-06-21 20:17:33,020 INFO L231 Difference]: Finished difference. Result has 157 places, 189 transitions, 2412 flow [2024-06-21 20:17:33,020 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=2242, PETRI_DIFFERENCE_MINUEND_PLACES=150, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=188, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=66, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=121, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2412, PETRI_PLACES=157, PETRI_TRANSITIONS=189} [2024-06-21 20:17:33,021 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 105 predicate places. [2024-06-21 20:17:33,021 INFO L495 AbstractCegarLoop]: Abstraction has has 157 places, 189 transitions, 2412 flow [2024-06-21 20:17:33,021 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 19.875) internal successors, (159), 8 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:17:33,021 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:17:33,021 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:17:33,022 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2024-06-21 20:17:33,022 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 20:17:33,022 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:17:33,022 INFO L85 PathProgramCache]: Analyzing trace with hash 2101922504, now seen corresponding path program 8 times [2024-06-21 20:17:33,022 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:17:33,022 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [71413792] [2024-06-21 20:17:33,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:17:33,023 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:17:33,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:17:33,188 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:17:33,188 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:17:33,188 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [71413792] [2024-06-21 20:17:33,188 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [71413792] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:17:33,188 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:17:33,188 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:17:33,189 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1067739011] [2024-06-21 20:17:33,189 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:17:33,189 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:17:33,189 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:17:33,190 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:17:33,190 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:17:33,271 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 49 [2024-06-21 20:17:33,272 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 157 places, 189 transitions, 2412 flow. Second operand has 8 states, 8 states have (on average 19.875) internal successors, (159), 8 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:17:33,272 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:17:33,272 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 49 [2024-06-21 20:17:33,273 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:17:34,613 INFO L124 PetriNetUnfolderBase]: 7788/11900 cut-off events. [2024-06-21 20:17:34,613 INFO L125 PetriNetUnfolderBase]: For 234421/235292 co-relation queries the response was YES. [2024-06-21 20:17:34,699 INFO L83 FinitePrefix]: Finished finitePrefix Result has 71953 conditions, 11900 events. 7788/11900 cut-off events. For 234421/235292 co-relation queries the response was YES. Maximal size of possible extension queue 712. Compared 79811 event pairs, 2581 based on Foata normal form. 83/11704 useless extension candidates. Maximal degree in co-relation 71877. Up to 10092 conditions per place. [2024-06-21 20:17:34,752 INFO L140 encePairwiseOnDemand]: 39/49 looper letters, 156 selfloop transitions, 55 changer transitions 0/227 dead transitions. [2024-06-21 20:17:34,752 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 162 places, 227 transitions, 2978 flow [2024-06-21 20:17:34,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 20:17:34,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 20:17:34,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 195 transitions. [2024-06-21 20:17:34,754 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6632653061224489 [2024-06-21 20:17:34,754 INFO L175 Difference]: Start difference. First operand has 157 places, 189 transitions, 2412 flow. Second operand 6 states and 195 transitions. [2024-06-21 20:17:34,754 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 162 places, 227 transitions, 2978 flow [2024-06-21 20:17:35,410 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 157 places, 227 transitions, 2832 flow, removed 8 selfloop flow, removed 5 redundant places. [2024-06-21 20:17:35,413 INFO L231 Difference]: Finished difference. Result has 158 places, 189 transitions, 2388 flow [2024-06-21 20:17:35,413 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=2266, PETRI_DIFFERENCE_MINUEND_PLACES=152, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=189, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=55, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=134, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2388, PETRI_PLACES=158, PETRI_TRANSITIONS=189} [2024-06-21 20:17:35,413 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 106 predicate places. [2024-06-21 20:17:35,413 INFO L495 AbstractCegarLoop]: Abstraction has has 158 places, 189 transitions, 2388 flow [2024-06-21 20:17:35,414 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 19.875) internal successors, (159), 8 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:17:35,414 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:17:35,414 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:17:35,414 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2024-06-21 20:17:35,414 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 20:17:35,414 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:17:35,415 INFO L85 PathProgramCache]: Analyzing trace with hash 958144138, now seen corresponding path program 1 times [2024-06-21 20:17:35,415 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:17:35,415 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [257274235] [2024-06-21 20:17:35,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:17:35,415 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:17:35,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:17:35,544 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:17:35,545 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:17:35,545 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [257274235] [2024-06-21 20:17:35,545 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [257274235] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:17:35,545 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:17:35,545 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:17:35,545 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1074247053] [2024-06-21 20:17:35,545 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:17:35,546 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:17:35,546 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:17:35,546 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:17:35,546 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:17:35,641 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 49 [2024-06-21 20:17:35,641 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 158 places, 189 transitions, 2388 flow. Second operand has 8 states, 8 states have (on average 19.875) internal successors, (159), 8 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:17:35,642 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:17:35,642 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 49 [2024-06-21 20:17:35,642 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:17:37,020 INFO L124 PetriNetUnfolderBase]: 8261/12723 cut-off events. [2024-06-21 20:17:37,020 INFO L125 PetriNetUnfolderBase]: For 254506/255466 co-relation queries the response was YES. [2024-06-21 20:17:37,116 INFO L83 FinitePrefix]: Finished finitePrefix Result has 77052 conditions, 12723 events. 8261/12723 cut-off events. For 254506/255466 co-relation queries the response was YES. Maximal size of possible extension queue 772. Compared 86889 event pairs, 2393 based on Foata normal form. 144/12601 useless extension candidates. Maximal degree in co-relation 76975. Up to 6218 conditions per place. [2024-06-21 20:17:37,173 INFO L140 encePairwiseOnDemand]: 39/49 looper letters, 149 selfloop transitions, 82 changer transitions 0/247 dead transitions. [2024-06-21 20:17:37,173 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 164 places, 247 transitions, 3270 flow [2024-06-21 20:17:37,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 20:17:37,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 20:17:37,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 230 transitions. [2024-06-21 20:17:37,175 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6705539358600583 [2024-06-21 20:17:37,175 INFO L175 Difference]: Start difference. First operand has 158 places, 189 transitions, 2388 flow. Second operand 7 states and 230 transitions. [2024-06-21 20:17:37,175 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 164 places, 247 transitions, 3270 flow [2024-06-21 20:17:37,931 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 159 places, 247 transitions, 3148 flow, removed 2 selfloop flow, removed 5 redundant places. [2024-06-21 20:17:37,933 INFO L231 Difference]: Finished difference. Result has 160 places, 191 transitions, 2498 flow [2024-06-21 20:17:37,934 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=2266, PETRI_DIFFERENCE_MINUEND_PLACES=153, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=189, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=81, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=108, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2498, PETRI_PLACES=160, PETRI_TRANSITIONS=191} [2024-06-21 20:17:37,934 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 108 predicate places. [2024-06-21 20:17:37,934 INFO L495 AbstractCegarLoop]: Abstraction has has 160 places, 191 transitions, 2498 flow [2024-06-21 20:17:37,934 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 19.875) internal successors, (159), 8 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:17:37,934 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:17:37,934 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:17:37,935 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2024-06-21 20:17:37,935 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 20:17:37,935 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:17:37,935 INFO L85 PathProgramCache]: Analyzing trace with hash 958412908, now seen corresponding path program 2 times [2024-06-21 20:17:37,935 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:17:37,935 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1263220574] [2024-06-21 20:17:37,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:17:37,936 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:17:37,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:17:38,110 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:17:38,111 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:17:38,111 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1263220574] [2024-06-21 20:17:38,111 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1263220574] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:17:38,111 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:17:38,111 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:17:38,111 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1384451788] [2024-06-21 20:17:38,111 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:17:38,112 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:17:38,112 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:17:38,112 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:17:38,113 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:17:38,161 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 49 [2024-06-21 20:17:38,161 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 160 places, 191 transitions, 2498 flow. Second operand has 8 states, 8 states have (on average 19.875) internal successors, (159), 8 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:17:38,161 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:17:38,161 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 49 [2024-06-21 20:17:38,161 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:17:39,548 INFO L124 PetriNetUnfolderBase]: 8451/13043 cut-off events. [2024-06-21 20:17:39,548 INFO L125 PetriNetUnfolderBase]: For 273696/274670 co-relation queries the response was YES. [2024-06-21 20:17:39,633 INFO L83 FinitePrefix]: Finished finitePrefix Result has 79834 conditions, 13043 events. 8451/13043 cut-off events. For 273696/274670 co-relation queries the response was YES. Maximal size of possible extension queue 798. Compared 89728 event pairs, 2366 based on Foata normal form. 140/12897 useless extension candidates. Maximal degree in co-relation 79756. Up to 6252 conditions per place. [2024-06-21 20:17:39,689 INFO L140 encePairwiseOnDemand]: 39/49 looper letters, 147 selfloop transitions, 83 changer transitions 0/246 dead transitions. [2024-06-21 20:17:39,689 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 166 places, 246 transitions, 3358 flow [2024-06-21 20:17:39,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 20:17:39,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 20:17:39,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 228 transitions. [2024-06-21 20:17:39,690 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6647230320699709 [2024-06-21 20:17:39,690 INFO L175 Difference]: Start difference. First operand has 160 places, 191 transitions, 2498 flow. Second operand 7 states and 228 transitions. [2024-06-21 20:17:39,690 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 166 places, 246 transitions, 3358 flow [2024-06-21 20:17:40,592 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 162 places, 246 transitions, 3166 flow, removed 17 selfloop flow, removed 4 redundant places. [2024-06-21 20:17:40,595 INFO L231 Difference]: Finished difference. Result has 163 places, 192 transitions, 2510 flow [2024-06-21 20:17:40,596 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=2314, PETRI_DIFFERENCE_MINUEND_PLACES=156, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=191, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=82, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=109, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2510, PETRI_PLACES=163, PETRI_TRANSITIONS=192} [2024-06-21 20:17:40,596 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 111 predicate places. [2024-06-21 20:17:40,596 INFO L495 AbstractCegarLoop]: Abstraction has has 163 places, 192 transitions, 2510 flow [2024-06-21 20:17:40,596 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 19.875) internal successors, (159), 8 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:17:40,596 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:17:40,596 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:17:40,597 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2024-06-21 20:17:40,597 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 20:17:40,597 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:17:40,598 INFO L85 PathProgramCache]: Analyzing trace with hash 1046978668, now seen corresponding path program 3 times [2024-06-21 20:17:40,598 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:17:40,598 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1199957170] [2024-06-21 20:17:40,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:17:40,598 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:17:40,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:17:40,717 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:17:40,718 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:17:40,718 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1199957170] [2024-06-21 20:17:40,718 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1199957170] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:17:40,718 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:17:40,718 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:17:40,718 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [568474055] [2024-06-21 20:17:40,718 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:17:40,719 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:17:40,719 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:17:40,719 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:17:40,719 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:17:40,776 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 49 [2024-06-21 20:17:40,777 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 163 places, 192 transitions, 2510 flow. Second operand has 8 states, 8 states have (on average 19.875) internal successors, (159), 8 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:17:40,777 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:17:40,777 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 49 [2024-06-21 20:17:40,777 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:17:42,171 INFO L124 PetriNetUnfolderBase]: 8730/13544 cut-off events. [2024-06-21 20:17:42,171 INFO L125 PetriNetUnfolderBase]: For 289838/290695 co-relation queries the response was YES. [2024-06-21 20:17:42,252 INFO L83 FinitePrefix]: Finished finitePrefix Result has 82428 conditions, 13544 events. 8730/13544 cut-off events. For 289838/290695 co-relation queries the response was YES. Maximal size of possible extension queue 830. Compared 94665 event pairs, 3008 based on Foata normal form. 136/13380 useless extension candidates. Maximal degree in co-relation 82349. Up to 10095 conditions per place. [2024-06-21 20:17:42,308 INFO L140 encePairwiseOnDemand]: 39/49 looper letters, 150 selfloop transitions, 71 changer transitions 0/237 dead transitions. [2024-06-21 20:17:42,309 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 169 places, 237 transitions, 3192 flow [2024-06-21 20:17:42,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 20:17:42,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 20:17:42,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 220 transitions. [2024-06-21 20:17:42,310 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.641399416909621 [2024-06-21 20:17:42,310 INFO L175 Difference]: Start difference. First operand has 163 places, 192 transitions, 2510 flow. Second operand 7 states and 220 transitions. [2024-06-21 20:17:42,310 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 169 places, 237 transitions, 3192 flow [2024-06-21 20:17:43,099 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 165 places, 237 transitions, 3060 flow, removed 4 selfloop flow, removed 4 redundant places. [2024-06-21 20:17:43,102 INFO L231 Difference]: Finished difference. Result has 166 places, 193 transitions, 2554 flow [2024-06-21 20:17:43,102 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=2379, PETRI_DIFFERENCE_MINUEND_PLACES=159, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=192, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=70, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=121, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2554, PETRI_PLACES=166, PETRI_TRANSITIONS=193} [2024-06-21 20:17:43,103 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 114 predicate places. [2024-06-21 20:17:43,103 INFO L495 AbstractCegarLoop]: Abstraction has has 166 places, 193 transitions, 2554 flow [2024-06-21 20:17:43,103 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 19.875) internal successors, (159), 8 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:17:43,103 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:17:43,103 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:17:43,103 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2024-06-21 20:17:43,103 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 20:17:43,104 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:17:43,104 INFO L85 PathProgramCache]: Analyzing trace with hash 2102106954, now seen corresponding path program 4 times [2024-06-21 20:17:43,104 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:17:43,104 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1999416552] [2024-06-21 20:17:43,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:17:43,104 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:17:43,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:17:43,251 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:17:43,252 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:17:43,252 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1999416552] [2024-06-21 20:17:43,252 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1999416552] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:17:43,252 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:17:43,252 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:17:43,252 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [164316312] [2024-06-21 20:17:43,252 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:17:43,253 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:17:43,253 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:17:43,253 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:17:43,253 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:17:43,325 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 49 [2024-06-21 20:17:43,326 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 166 places, 193 transitions, 2554 flow. Second operand has 8 states, 8 states have (on average 19.875) internal successors, (159), 8 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:17:43,326 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:17:43,326 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 49 [2024-06-21 20:17:43,326 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:17:44,739 INFO L124 PetriNetUnfolderBase]: 8632/13312 cut-off events. [2024-06-21 20:17:44,739 INFO L125 PetriNetUnfolderBase]: For 282764/283633 co-relation queries the response was YES. [2024-06-21 20:17:44,844 INFO L83 FinitePrefix]: Finished finitePrefix Result has 79764 conditions, 13312 events. 8632/13312 cut-off events. For 282764/283633 co-relation queries the response was YES. Maximal size of possible extension queue 815. Compared 91715 event pairs, 2422 based on Foata normal form. 75/13051 useless extension candidates. Maximal degree in co-relation 79684. Up to 9827 conditions per place. [2024-06-21 20:17:44,904 INFO L140 encePairwiseOnDemand]: 39/49 looper letters, 158 selfloop transitions, 64 changer transitions 0/238 dead transitions. [2024-06-21 20:17:44,905 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 171 places, 238 transitions, 3206 flow [2024-06-21 20:17:44,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 20:17:44,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 20:17:44,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 200 transitions. [2024-06-21 20:17:44,906 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6802721088435374 [2024-06-21 20:17:44,906 INFO L175 Difference]: Start difference. First operand has 166 places, 193 transitions, 2554 flow. Second operand 6 states and 200 transitions. [2024-06-21 20:17:44,906 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 171 places, 238 transitions, 3206 flow [2024-06-21 20:17:45,785 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 166 places, 238 transitions, 3052 flow, removed 7 selfloop flow, removed 5 redundant places. [2024-06-21 20:17:45,789 INFO L231 Difference]: Finished difference. Result has 167 places, 193 transitions, 2537 flow [2024-06-21 20:17:45,789 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=2400, PETRI_DIFFERENCE_MINUEND_PLACES=161, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=193, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=64, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=129, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2537, PETRI_PLACES=167, PETRI_TRANSITIONS=193} [2024-06-21 20:17:45,790 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 115 predicate places. [2024-06-21 20:17:45,790 INFO L495 AbstractCegarLoop]: Abstraction has has 167 places, 193 transitions, 2537 flow [2024-06-21 20:17:45,790 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 19.875) internal successors, (159), 8 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:17:45,790 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:17:45,790 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:17:45,790 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2024-06-21 20:17:45,791 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 20:17:45,791 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:17:45,791 INFO L85 PathProgramCache]: Analyzing trace with hash 1325105589, now seen corresponding path program 1 times [2024-06-21 20:17:45,791 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:17:45,791 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [299668554] [2024-06-21 20:17:45,791 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:17:45,791 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:17:45,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:17:45,902 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:17:45,903 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:17:45,903 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [299668554] [2024-06-21 20:17:45,903 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [299668554] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:17:45,903 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:17:45,903 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 20:17:45,903 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1910519838] [2024-06-21 20:17:45,903 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:17:45,904 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 20:17:45,904 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:17:45,904 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 20:17:45,904 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-21 20:17:45,933 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 49 [2024-06-21 20:17:45,933 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 167 places, 193 transitions, 2537 flow. Second operand has 6 states, 6 states have (on average 19.666666666666668) internal successors, (118), 6 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:17:45,933 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:17:45,933 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 49 [2024-06-21 20:17:45,933 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:17:47,376 INFO L124 PetriNetUnfolderBase]: 9585/14477 cut-off events. [2024-06-21 20:17:47,376 INFO L125 PetriNetUnfolderBase]: For 256847/256855 co-relation queries the response was YES. [2024-06-21 20:17:47,472 INFO L83 FinitePrefix]: Finished finitePrefix Result has 84215 conditions, 14477 events. 9585/14477 cut-off events. For 256847/256855 co-relation queries the response was YES. Maximal size of possible extension queue 808. Compared 97168 event pairs, 3552 based on Foata normal form. 7/14479 useless extension candidates. Maximal degree in co-relation 84134. Up to 13575 conditions per place. [2024-06-21 20:17:47,533 INFO L140 encePairwiseOnDemand]: 40/49 looper letters, 178 selfloop transitions, 39 changer transitions 0/226 dead transitions. [2024-06-21 20:17:47,533 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 173 places, 226 transitions, 3249 flow [2024-06-21 20:17:47,534 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 20:17:47,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 20:17:47,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 194 transitions. [2024-06-21 20:17:47,534 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.565597667638484 [2024-06-21 20:17:47,534 INFO L175 Difference]: Start difference. First operand has 167 places, 193 transitions, 2537 flow. Second operand 7 states and 194 transitions. [2024-06-21 20:17:47,534 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 173 places, 226 transitions, 3249 flow [2024-06-21 20:17:48,275 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 167 places, 226 transitions, 3073 flow, removed 1 selfloop flow, removed 6 redundant places. [2024-06-21 20:17:48,278 INFO L231 Difference]: Finished difference. Result has 169 places, 205 transitions, 2635 flow [2024-06-21 20:17:48,278 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=2361, PETRI_DIFFERENCE_MINUEND_PLACES=161, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=193, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=160, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2635, PETRI_PLACES=169, PETRI_TRANSITIONS=205} [2024-06-21 20:17:48,279 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 117 predicate places. [2024-06-21 20:17:48,279 INFO L495 AbstractCegarLoop]: Abstraction has has 169 places, 205 transitions, 2635 flow [2024-06-21 20:17:48,279 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 19.666666666666668) internal successors, (118), 6 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:17:48,279 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:17:48,279 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:17:48,279 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2024-06-21 20:17:48,280 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 20:17:48,280 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:17:48,280 INFO L85 PathProgramCache]: Analyzing trace with hash 1325404119, now seen corresponding path program 2 times [2024-06-21 20:17:48,280 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:17:48,280 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1177942931] [2024-06-21 20:17:48,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:17:48,281 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:17:48,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:17:48,425 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:17:48,425 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:17:48,425 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1177942931] [2024-06-21 20:17:48,425 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1177942931] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:17:48,426 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:17:48,426 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 20:17:48,426 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [924076613] [2024-06-21 20:17:48,426 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:17:48,426 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 20:17:48,426 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:17:48,427 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 20:17:48,427 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-21 20:17:48,461 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 49 [2024-06-21 20:17:48,462 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 169 places, 205 transitions, 2635 flow. Second operand has 6 states, 6 states have (on average 19.666666666666668) internal successors, (118), 6 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:17:48,462 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:17:48,462 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 49 [2024-06-21 20:17:48,462 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:17:49,932 INFO L124 PetriNetUnfolderBase]: 9581/14462 cut-off events. [2024-06-21 20:17:49,932 INFO L125 PetriNetUnfolderBase]: For 265078/265096 co-relation queries the response was YES. [2024-06-21 20:17:50,033 INFO L83 FinitePrefix]: Finished finitePrefix Result has 84993 conditions, 14462 events. 9581/14462 cut-off events. For 265078/265096 co-relation queries the response was YES. Maximal size of possible extension queue 808. Compared 97058 event pairs, 3566 based on Foata normal form. 17/14470 useless extension candidates. Maximal degree in co-relation 84910. Up to 13571 conditions per place. [2024-06-21 20:17:50,096 INFO L140 encePairwiseOnDemand]: 40/49 looper letters, 171 selfloop transitions, 37 changer transitions 0/217 dead transitions. [2024-06-21 20:17:50,097 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 173 places, 217 transitions, 3081 flow [2024-06-21 20:17:50,097 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-21 20:17:50,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-21 20:17:50,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 143 transitions. [2024-06-21 20:17:50,098 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5836734693877551 [2024-06-21 20:17:50,098 INFO L175 Difference]: Start difference. First operand has 169 places, 205 transitions, 2635 flow. Second operand 5 states and 143 transitions. [2024-06-21 20:17:50,098 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 173 places, 217 transitions, 3081 flow [2024-06-21 20:17:50,894 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 171 places, 217 transitions, 2955 flow, removed 56 selfloop flow, removed 2 redundant places. [2024-06-21 20:17:50,898 INFO L231 Difference]: Finished difference. Result has 172 places, 205 transitions, 2595 flow [2024-06-21 20:17:50,898 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=2509, PETRI_DIFFERENCE_MINUEND_PLACES=167, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=205, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=168, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=2595, PETRI_PLACES=172, PETRI_TRANSITIONS=205} [2024-06-21 20:17:50,898 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 120 predicate places. [2024-06-21 20:17:50,898 INFO L495 AbstractCegarLoop]: Abstraction has has 172 places, 205 transitions, 2595 flow [2024-06-21 20:17:50,899 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 19.666666666666668) internal successors, (118), 6 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:17:50,899 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:17:50,899 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:17:50,899 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2024-06-21 20:17:50,899 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 20:17:50,900 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:17:50,900 INFO L85 PathProgramCache]: Analyzing trace with hash 100814959, now seen corresponding path program 1 times [2024-06-21 20:17:50,900 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:17:50,900 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1600784255] [2024-06-21 20:17:50,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:17:50,901 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:17:50,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:17:51,022 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:17:51,023 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:17:51,023 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1600784255] [2024-06-21 20:17:51,023 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1600784255] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:17:51,023 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:17:51,023 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 20:17:51,023 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1061711821] [2024-06-21 20:17:51,024 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:17:51,024 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 20:17:51,024 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:17:51,024 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 20:17:51,024 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-06-21 20:17:51,088 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 49 [2024-06-21 20:17:51,089 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 172 places, 205 transitions, 2595 flow. Second operand has 6 states, 6 states have (on average 21.666666666666668) internal successors, (130), 6 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:17:51,089 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:17:51,089 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 49 [2024-06-21 20:17:51,089 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:17:52,543 INFO L124 PetriNetUnfolderBase]: 9251/13943 cut-off events. [2024-06-21 20:17:52,543 INFO L125 PetriNetUnfolderBase]: For 310945/311078 co-relation queries the response was YES. [2024-06-21 20:17:52,636 INFO L83 FinitePrefix]: Finished finitePrefix Result has 83540 conditions, 13943 events. 9251/13943 cut-off events. For 310945/311078 co-relation queries the response was YES. Maximal size of possible extension queue 833. Compared 94363 event pairs, 3360 based on Foata normal form. 87/13562 useless extension candidates. Maximal degree in co-relation 83455. Up to 12410 conditions per place. [2024-06-21 20:17:52,696 INFO L140 encePairwiseOnDemand]: 40/49 looper letters, 130 selfloop transitions, 52 changer transitions 0/226 dead transitions. [2024-06-21 20:17:52,696 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 176 places, 226 transitions, 3075 flow [2024-06-21 20:17:52,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-21 20:17:52,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-21 20:17:52,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 155 transitions. [2024-06-21 20:17:52,697 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6326530612244898 [2024-06-21 20:17:52,697 INFO L175 Difference]: Start difference. First operand has 172 places, 205 transitions, 2595 flow. Second operand 5 states and 155 transitions. [2024-06-21 20:17:52,697 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 176 places, 226 transitions, 3075 flow [2024-06-21 20:17:53,381 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 171 places, 226 transitions, 2994 flow, removed 1 selfloop flow, removed 5 redundant places. [2024-06-21 20:17:53,384 INFO L231 Difference]: Finished difference. Result has 172 places, 208 transitions, 2678 flow [2024-06-21 20:17:53,384 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=2514, PETRI_DIFFERENCE_MINUEND_PLACES=167, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=205, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=153, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=2678, PETRI_PLACES=172, PETRI_TRANSITIONS=208} [2024-06-21 20:17:53,385 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 120 predicate places. [2024-06-21 20:17:53,385 INFO L495 AbstractCegarLoop]: Abstraction has has 172 places, 208 transitions, 2678 flow [2024-06-21 20:17:53,385 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 21.666666666666668) internal successors, (130), 6 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:17:53,385 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:17:53,385 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:17:53,386 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2024-06-21 20:17:53,386 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 20:17:53,386 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:17:53,386 INFO L85 PathProgramCache]: Analyzing trace with hash 1090773493, now seen corresponding path program 3 times [2024-06-21 20:17:53,386 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:17:53,386 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [135436234] [2024-06-21 20:17:53,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:17:53,387 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:17:53,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:17:53,491 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:17:53,492 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:17:53,492 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [135436234] [2024-06-21 20:17:53,492 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [135436234] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:17:53,492 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:17:53,492 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 20:17:53,492 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1957461765] [2024-06-21 20:17:53,492 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:17:53,492 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 20:17:53,493 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:17:53,493 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 20:17:53,493 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-21 20:17:53,529 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 49 [2024-06-21 20:17:53,530 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 172 places, 208 transitions, 2678 flow. Second operand has 6 states, 6 states have (on average 19.666666666666668) internal successors, (118), 6 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:17:53,530 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:17:53,530 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 49 [2024-06-21 20:17:53,530 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:17:55,037 INFO L124 PetriNetUnfolderBase]: 9916/14953 cut-off events. [2024-06-21 20:17:55,037 INFO L125 PetriNetUnfolderBase]: For 277080/277088 co-relation queries the response was YES. [2024-06-21 20:17:55,135 INFO L83 FinitePrefix]: Finished finitePrefix Result has 89497 conditions, 14953 events. 9916/14953 cut-off events. For 277080/277088 co-relation queries the response was YES. Maximal size of possible extension queue 847. Compared 100565 event pairs, 3607 based on Foata normal form. 7/14953 useless extension candidates. Maximal degree in co-relation 89412. Up to 14020 conditions per place. [2024-06-21 20:17:55,198 INFO L140 encePairwiseOnDemand]: 40/49 looper letters, 184 selfloop transitions, 47 changer transitions 0/240 dead transitions. [2024-06-21 20:17:55,199 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 177 places, 240 transitions, 3430 flow [2024-06-21 20:17:55,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 20:17:55,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 20:17:55,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 172 transitions. [2024-06-21 20:17:55,200 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5850340136054422 [2024-06-21 20:17:55,200 INFO L175 Difference]: Start difference. First operand has 172 places, 208 transitions, 2678 flow. Second operand 6 states and 172 transitions. [2024-06-21 20:17:55,200 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 177 places, 240 transitions, 3430 flow [2024-06-21 20:17:56,042 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 174 places, 240 transitions, 3322 flow, removed 10 selfloop flow, removed 3 redundant places. [2024-06-21 20:17:56,045 INFO L231 Difference]: Finished difference. Result has 176 places, 220 transitions, 2876 flow [2024-06-21 20:17:56,045 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=2572, PETRI_DIFFERENCE_MINUEND_PLACES=169, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=208, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=167, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2876, PETRI_PLACES=176, PETRI_TRANSITIONS=220} [2024-06-21 20:17:56,046 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 124 predicate places. [2024-06-21 20:17:56,046 INFO L495 AbstractCegarLoop]: Abstraction has has 176 places, 220 transitions, 2876 flow [2024-06-21 20:17:56,046 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 19.666666666666668) internal successors, (118), 6 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:17:56,046 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:17:56,046 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:17:56,046 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2024-06-21 20:17:56,047 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 20:17:56,047 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:17:56,047 INFO L85 PathProgramCache]: Analyzing trace with hash -118815385, now seen corresponding path program 4 times [2024-06-21 20:17:56,047 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:17:56,047 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [70764655] [2024-06-21 20:17:56,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:17:56,047 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:17:56,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:17:56,140 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:17:56,140 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:17:56,140 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [70764655] [2024-06-21 20:17:56,141 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [70764655] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:17:56,141 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:17:56,141 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 20:17:56,141 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1490433837] [2024-06-21 20:17:56,141 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:17:56,141 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 20:17:56,141 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:17:56,142 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 20:17:56,142 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-21 20:17:56,169 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 49 [2024-06-21 20:17:56,169 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 176 places, 220 transitions, 2876 flow. Second operand has 6 states, 6 states have (on average 19.666666666666668) internal successors, (118), 6 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:17:56,169 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:17:56,169 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 49 [2024-06-21 20:17:56,169 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:17:57,708 INFO L124 PetriNetUnfolderBase]: 9923/14946 cut-off events. [2024-06-21 20:17:57,708 INFO L125 PetriNetUnfolderBase]: For 280253/280271 co-relation queries the response was YES. [2024-06-21 20:17:57,805 INFO L83 FinitePrefix]: Finished finitePrefix Result has 89515 conditions, 14946 events. 9923/14946 cut-off events. For 280253/280271 co-relation queries the response was YES. Maximal size of possible extension queue 845. Compared 100262 event pairs, 3628 based on Foata normal form. 17/14954 useless extension candidates. Maximal degree in co-relation 89428. Up to 14028 conditions per place. [2024-06-21 20:17:57,865 INFO L140 encePairwiseOnDemand]: 40/49 looper letters, 178 selfloop transitions, 51 changer transitions 0/238 dead transitions. [2024-06-21 20:17:57,866 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 181 places, 238 transitions, 3506 flow [2024-06-21 20:17:57,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 20:17:57,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 20:17:57,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 166 transitions. [2024-06-21 20:17:57,867 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.564625850340136 [2024-06-21 20:17:57,867 INFO L175 Difference]: Start difference. First operand has 176 places, 220 transitions, 2876 flow. Second operand 6 states and 166 transitions. [2024-06-21 20:17:57,867 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 181 places, 238 transitions, 3506 flow [2024-06-21 20:17:58,760 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 180 places, 238 transitions, 3412 flow, removed 42 selfloop flow, removed 1 redundant places. [2024-06-21 20:17:58,763 INFO L231 Difference]: Finished difference. Result has 181 places, 224 transitions, 2963 flow [2024-06-21 20:17:58,763 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=2784, PETRI_DIFFERENCE_MINUEND_PLACES=175, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=220, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=173, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2963, PETRI_PLACES=181, PETRI_TRANSITIONS=224} [2024-06-21 20:17:58,763 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 129 predicate places. [2024-06-21 20:17:58,764 INFO L495 AbstractCegarLoop]: Abstraction has has 181 places, 224 transitions, 2963 flow [2024-06-21 20:17:58,764 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 19.666666666666668) internal successors, (118), 6 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:17:58,764 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:17:58,764 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:17:58,764 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2024-06-21 20:17:58,764 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 20:17:58,764 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:17:58,765 INFO L85 PathProgramCache]: Analyzing trace with hash 679443797, now seen corresponding path program 5 times [2024-06-21 20:17:58,765 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:17:58,765 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1938592087] [2024-06-21 20:17:58,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:17:58,765 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:17:58,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:17:58,863 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:17:58,863 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:17:58,863 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1938592087] [2024-06-21 20:17:58,863 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1938592087] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:17:58,863 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:17:58,864 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 20:17:58,864 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2005222685] [2024-06-21 20:17:58,864 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:17:58,864 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 20:17:58,864 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:17:58,864 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 20:17:58,865 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-21 20:17:58,900 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 49 [2024-06-21 20:17:58,900 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 181 places, 224 transitions, 2963 flow. Second operand has 6 states, 6 states have (on average 19.666666666666668) internal successors, (118), 6 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:17:58,901 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:17:58,901 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 49 [2024-06-21 20:17:58,901 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:18:00,441 INFO L124 PetriNetUnfolderBase]: 9919/14945 cut-off events. [2024-06-21 20:18:00,441 INFO L125 PetriNetUnfolderBase]: For 280165/280183 co-relation queries the response was YES. [2024-06-21 20:18:00,550 INFO L83 FinitePrefix]: Finished finitePrefix Result has 88237 conditions, 14945 events. 9919/14945 cut-off events. For 280165/280183 co-relation queries the response was YES. Maximal size of possible extension queue 845. Compared 100358 event pairs, 3632 based on Foata normal form. 17/14953 useless extension candidates. Maximal degree in co-relation 88147. Up to 14024 conditions per place. [2024-06-21 20:18:00,612 INFO L140 encePairwiseOnDemand]: 40/49 looper letters, 177 selfloop transitions, 51 changer transitions 0/237 dead transitions. [2024-06-21 20:18:00,613 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 186 places, 237 transitions, 3451 flow [2024-06-21 20:18:00,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 20:18:00,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 20:18:00,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 165 transitions. [2024-06-21 20:18:00,614 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5612244897959183 [2024-06-21 20:18:00,614 INFO L175 Difference]: Start difference. First operand has 181 places, 224 transitions, 2963 flow. Second operand 6 states and 165 transitions. [2024-06-21 20:18:00,614 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 186 places, 237 transitions, 3451 flow [2024-06-21 20:18:01,746 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 183 places, 237 transitions, 3264 flow, removed 52 selfloop flow, removed 3 redundant places. [2024-06-21 20:18:01,749 INFO L231 Difference]: Finished difference. Result has 184 places, 224 transitions, 2885 flow [2024-06-21 20:18:01,749 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=2776, PETRI_DIFFERENCE_MINUEND_PLACES=178, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=224, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=173, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2885, PETRI_PLACES=184, PETRI_TRANSITIONS=224} [2024-06-21 20:18:01,750 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 132 predicate places. [2024-06-21 20:18:01,750 INFO L495 AbstractCegarLoop]: Abstraction has has 184 places, 224 transitions, 2885 flow [2024-06-21 20:18:01,750 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 19.666666666666668) internal successors, (118), 6 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:18:01,750 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:18:01,750 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:18:01,750 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2024-06-21 20:18:01,751 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 20:18:01,751 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:18:01,751 INFO L85 PathProgramCache]: Analyzing trace with hash 679456693, now seen corresponding path program 2 times [2024-06-21 20:18:01,751 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:18:01,751 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [314824115] [2024-06-21 20:18:01,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:18:01,751 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:18:01,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:18:01,850 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:18:01,850 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:18:01,850 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [314824115] [2024-06-21 20:18:01,851 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [314824115] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:18:01,851 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:18:01,851 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 20:18:01,851 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [236742162] [2024-06-21 20:18:01,851 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:18:01,851 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 20:18:01,851 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:18:01,852 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 20:18:01,852 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-21 20:18:01,918 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 49 [2024-06-21 20:18:01,919 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 184 places, 224 transitions, 2885 flow. Second operand has 6 states, 6 states have (on average 21.666666666666668) internal successors, (130), 6 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:18:01,919 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:18:01,919 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 49 [2024-06-21 20:18:01,919 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:18:03,400 INFO L124 PetriNetUnfolderBase]: 9365/14121 cut-off events. [2024-06-21 20:18:03,400 INFO L125 PetriNetUnfolderBase]: For 312052/312177 co-relation queries the response was YES. [2024-06-21 20:18:03,497 INFO L83 FinitePrefix]: Finished finitePrefix Result has 85204 conditions, 14121 events. 9365/14121 cut-off events. For 312052/312177 co-relation queries the response was YES. Maximal size of possible extension queue 843. Compared 95734 event pairs, 3368 based on Foata normal form. 43/13697 useless extension candidates. Maximal degree in co-relation 85113. Up to 12796 conditions per place. [2024-06-21 20:18:03,558 INFO L140 encePairwiseOnDemand]: 41/49 looper letters, 153 selfloop transitions, 38 changer transitions 0/243 dead transitions. [2024-06-21 20:18:03,558 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 189 places, 243 transitions, 3355 flow [2024-06-21 20:18:03,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 20:18:03,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 20:18:03,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 174 transitions. [2024-06-21 20:18:03,559 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5918367346938775 [2024-06-21 20:18:03,559 INFO L175 Difference]: Start difference. First operand has 184 places, 224 transitions, 2885 flow. Second operand 6 states and 174 transitions. [2024-06-21 20:18:03,560 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 189 places, 243 transitions, 3355 flow [2024-06-21 20:18:04,491 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 184 places, 243 transitions, 3207 flow, removed 10 selfloop flow, removed 5 redundant places. [2024-06-21 20:18:04,494 INFO L231 Difference]: Finished difference. Result has 185 places, 226 transitions, 2848 flow [2024-06-21 20:18:04,495 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=2737, PETRI_DIFFERENCE_MINUEND_PLACES=179, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=224, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=186, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2848, PETRI_PLACES=185, PETRI_TRANSITIONS=226} [2024-06-21 20:18:04,495 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 133 predicate places. [2024-06-21 20:18:04,495 INFO L495 AbstractCegarLoop]: Abstraction has has 185 places, 226 transitions, 2848 flow [2024-06-21 20:18:04,495 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 21.666666666666668) internal successors, (130), 6 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:18:04,495 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:18:04,496 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:18:04,496 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2024-06-21 20:18:04,496 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 20:18:04,496 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:18:04,496 INFO L85 PathProgramCache]: Analyzing trace with hash 1368517167, now seen corresponding path program 3 times [2024-06-21 20:18:04,496 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:18:04,496 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [446119609] [2024-06-21 20:18:04,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:18:04,497 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:18:04,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:18:04,616 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:18:04,616 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:18:04,616 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [446119609] [2024-06-21 20:18:04,616 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [446119609] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:18:04,616 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:18:04,616 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 20:18:04,617 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1096894432] [2024-06-21 20:18:04,617 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:18:04,617 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 20:18:04,617 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:18:04,617 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 20:18:04,617 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-21 20:18:04,659 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 49 [2024-06-21 20:18:04,659 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 185 places, 226 transitions, 2848 flow. Second operand has 6 states, 6 states have (on average 21.666666666666668) internal successors, (130), 6 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:18:04,659 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:18:04,659 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 49 [2024-06-21 20:18:04,660 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:18:06,384 INFO L124 PetriNetUnfolderBase]: 9373/14125 cut-off events. [2024-06-21 20:18:06,384 INFO L125 PetriNetUnfolderBase]: For 319277/319390 co-relation queries the response was YES. [2024-06-21 20:18:06,460 INFO L83 FinitePrefix]: Finished finitePrefix Result has 86240 conditions, 14125 events. 9373/14125 cut-off events. For 319277/319390 co-relation queries the response was YES. Maximal size of possible extension queue 846. Compared 95515 event pairs, 3340 based on Foata normal form. 41/13705 useless extension candidates. Maximal degree in co-relation 86149. Up to 12680 conditions per place. [2024-06-21 20:18:06,515 INFO L140 encePairwiseOnDemand]: 41/49 looper letters, 154 selfloop transitions, 43 changer transitions 0/249 dead transitions. [2024-06-21 20:18:06,515 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 190 places, 249 transitions, 3368 flow [2024-06-21 20:18:06,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 20:18:06,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 20:18:06,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 176 transitions. [2024-06-21 20:18:06,516 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5986394557823129 [2024-06-21 20:18:06,517 INFO L175 Difference]: Start difference. First operand has 185 places, 226 transitions, 2848 flow. Second operand 6 states and 176 transitions. [2024-06-21 20:18:06,517 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 190 places, 249 transitions, 3368 flow [2024-06-21 20:18:07,384 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 186 places, 249 transitions, 3287 flow, removed 5 selfloop flow, removed 4 redundant places. [2024-06-21 20:18:07,388 INFO L231 Difference]: Finished difference. Result has 188 places, 229 transitions, 2921 flow [2024-06-21 20:18:07,388 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=2767, PETRI_DIFFERENCE_MINUEND_PLACES=181, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=226, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=183, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2921, PETRI_PLACES=188, PETRI_TRANSITIONS=229} [2024-06-21 20:18:07,388 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 136 predicate places. [2024-06-21 20:18:07,389 INFO L495 AbstractCegarLoop]: Abstraction has has 188 places, 229 transitions, 2921 flow [2024-06-21 20:18:07,389 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 21.666666666666668) internal successors, (130), 6 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:18:07,389 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:18:07,389 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:18:07,389 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2024-06-21 20:18:07,389 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 20:18:07,389 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:18:07,390 INFO L85 PathProgramCache]: Analyzing trace with hash -800445355, now seen corresponding path program 1 times [2024-06-21 20:18:07,390 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:18:07,390 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [655334114] [2024-06-21 20:18:07,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:18:07,390 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:18:07,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:18:07,484 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:18:07,485 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:18:07,485 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [655334114] [2024-06-21 20:18:07,485 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [655334114] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:18:07,485 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:18:07,485 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 20:18:07,485 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [607344792] [2024-06-21 20:18:07,486 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:18:07,486 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 20:18:07,486 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:18:07,486 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 20:18:07,486 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-21 20:18:07,537 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 49 [2024-06-21 20:18:07,538 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 188 places, 229 transitions, 2921 flow. Second operand has 6 states, 6 states have (on average 19.666666666666668) internal successors, (118), 6 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:18:07,538 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:18:07,538 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 49 [2024-06-21 20:18:07,538 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:18:09,341 INFO L124 PetriNetUnfolderBase]: 10126/15244 cut-off events. [2024-06-21 20:18:09,342 INFO L125 PetriNetUnfolderBase]: For 326226/326226 co-relation queries the response was YES. [2024-06-21 20:18:09,451 INFO L83 FinitePrefix]: Finished finitePrefix Result has 92937 conditions, 15244 events. 10126/15244 cut-off events. For 326226/326226 co-relation queries the response was YES. Maximal size of possible extension queue 865. Compared 102433 event pairs, 3653 based on Foata normal form. 6/15246 useless extension candidates. Maximal degree in co-relation 92844. Up to 14266 conditions per place. [2024-06-21 20:18:09,523 INFO L140 encePairwiseOnDemand]: 41/49 looper letters, 234 selfloop transitions, 25 changer transitions 0/268 dead transitions. [2024-06-21 20:18:09,523 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 193 places, 268 transitions, 3724 flow [2024-06-21 20:18:09,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 20:18:09,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 20:18:09,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 179 transitions. [2024-06-21 20:18:09,524 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.608843537414966 [2024-06-21 20:18:09,524 INFO L175 Difference]: Start difference. First operand has 188 places, 229 transitions, 2921 flow. Second operand 6 states and 179 transitions. [2024-06-21 20:18:09,524 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 193 places, 268 transitions, 3724 flow [2024-06-21 20:18:10,712 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 190 places, 268 transitions, 3640 flow, removed 8 selfloop flow, removed 3 redundant places. [2024-06-21 20:18:10,716 INFO L231 Difference]: Finished difference. Result has 192 places, 235 transitions, 3006 flow [2024-06-21 20:18:10,716 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=2837, PETRI_DIFFERENCE_MINUEND_PLACES=185, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=229, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=206, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3006, PETRI_PLACES=192, PETRI_TRANSITIONS=235} [2024-06-21 20:18:10,716 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 140 predicate places. [2024-06-21 20:18:10,716 INFO L495 AbstractCegarLoop]: Abstraction has has 192 places, 235 transitions, 3006 flow [2024-06-21 20:18:10,716 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 19.666666666666668) internal successors, (118), 6 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:18:10,717 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:18:10,717 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:18:10,717 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2024-06-21 20:18:10,717 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 20:18:10,717 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:18:10,717 INFO L85 PathProgramCache]: Analyzing trace with hash -791874475, now seen corresponding path program 2 times [2024-06-21 20:18:10,717 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:18:10,718 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [751321885] [2024-06-21 20:18:10,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:18:10,718 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:18:10,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:18:10,814 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:18:10,815 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:18:10,815 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [751321885] [2024-06-21 20:18:10,815 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [751321885] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:18:10,815 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:18:10,815 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 20:18:10,815 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1909148889] [2024-06-21 20:18:10,816 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:18:10,816 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 20:18:10,816 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:18:10,816 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 20:18:10,816 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-21 20:18:10,849 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 49 [2024-06-21 20:18:10,850 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 192 places, 235 transitions, 3006 flow. Second operand has 6 states, 6 states have (on average 19.666666666666668) internal successors, (118), 6 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:18:10,850 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:18:10,850 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 49 [2024-06-21 20:18:10,850 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:18:12,559 INFO L124 PetriNetUnfolderBase]: 10170/15304 cut-off events. [2024-06-21 20:18:12,559 INFO L125 PetriNetUnfolderBase]: For 342513/342513 co-relation queries the response was YES. [2024-06-21 20:18:12,653 INFO L83 FinitePrefix]: Finished finitePrefix Result has 94056 conditions, 15304 events. 10170/15304 cut-off events. For 342513/342513 co-relation queries the response was YES. Maximal size of possible extension queue 864. Compared 102982 event pairs, 3644 based on Foata normal form. 8/15308 useless extension candidates. Maximal degree in co-relation 93961. Up to 14402 conditions per place. [2024-06-21 20:18:12,713 INFO L140 encePairwiseOnDemand]: 41/49 looper letters, 229 selfloop transitions, 22 changer transitions 0/260 dead transitions. [2024-06-21 20:18:12,713 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 197 places, 260 transitions, 3626 flow [2024-06-21 20:18:12,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 20:18:12,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 20:18:12,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 170 transitions. [2024-06-21 20:18:12,714 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5782312925170068 [2024-06-21 20:18:12,714 INFO L175 Difference]: Start difference. First operand has 192 places, 235 transitions, 3006 flow. Second operand 6 states and 170 transitions. [2024-06-21 20:18:12,714 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 197 places, 260 transitions, 3626 flow [2024-06-21 20:18:13,968 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 195 places, 260 transitions, 3569 flow, removed 18 selfloop flow, removed 2 redundant places. [2024-06-21 20:18:13,971 INFO L231 Difference]: Finished difference. Result has 196 places, 237 transitions, 3041 flow [2024-06-21 20:18:13,972 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=2957, PETRI_DIFFERENCE_MINUEND_PLACES=190, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=235, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=213, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3041, PETRI_PLACES=196, PETRI_TRANSITIONS=237} [2024-06-21 20:18:13,972 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 144 predicate places. [2024-06-21 20:18:13,972 INFO L495 AbstractCegarLoop]: Abstraction has has 196 places, 237 transitions, 3041 flow [2024-06-21 20:18:13,972 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 19.666666666666668) internal successors, (118), 6 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:18:13,972 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:18:13,972 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:18:13,973 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2024-06-21 20:18:13,973 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 20:18:13,973 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:18:13,973 INFO L85 PathProgramCache]: Analyzing trace with hash 1090577015, now seen corresponding path program 1 times [2024-06-21 20:18:13,973 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:18:13,973 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [455527621] [2024-06-21 20:18:13,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:18:13,974 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:18:13,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:18:14,063 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:18:14,063 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:18:14,063 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [455527621] [2024-06-21 20:18:14,063 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [455527621] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:18:14,063 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:18:14,063 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 20:18:14,064 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2090602185] [2024-06-21 20:18:14,064 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:18:14,064 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 20:18:14,064 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:18:14,064 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 20:18:14,065 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-21 20:18:14,095 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 49 [2024-06-21 20:18:14,095 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 196 places, 237 transitions, 3041 flow. Second operand has 6 states, 6 states have (on average 19.666666666666668) internal successors, (118), 6 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:18:14,095 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:18:14,095 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 49 [2024-06-21 20:18:14,095 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:18:15,760 INFO L124 PetriNetUnfolderBase]: 10188/15329 cut-off events. [2024-06-21 20:18:15,760 INFO L125 PetriNetUnfolderBase]: For 348889/348893 co-relation queries the response was YES. [2024-06-21 20:18:15,871 INFO L83 FinitePrefix]: Finished finitePrefix Result has 94445 conditions, 15329 events. 10188/15329 cut-off events. For 348889/348893 co-relation queries the response was YES. Maximal size of possible extension queue 866. Compared 103042 event pairs, 3619 based on Foata normal form. 5/15329 useless extension candidates. Maximal degree in co-relation 94348. Up to 14410 conditions per place. [2024-06-21 20:18:15,935 INFO L140 encePairwiseOnDemand]: 40/49 looper letters, 229 selfloop transitions, 39 changer transitions 0/277 dead transitions. [2024-06-21 20:18:15,935 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 201 places, 277 transitions, 4013 flow [2024-06-21 20:18:15,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 20:18:15,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 20:18:15,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 176 transitions. [2024-06-21 20:18:15,936 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5986394557823129 [2024-06-21 20:18:15,936 INFO L175 Difference]: Start difference. First operand has 196 places, 237 transitions, 3041 flow. Second operand 6 states and 176 transitions. [2024-06-21 20:18:15,936 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 201 places, 277 transitions, 4013 flow [2024-06-21 20:18:17,289 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 197 places, 277 transitions, 3963 flow, removed 5 selfloop flow, removed 4 redundant places. [2024-06-21 20:18:17,292 INFO L231 Difference]: Finished difference. Result has 200 places, 252 transitions, 3326 flow [2024-06-21 20:18:17,292 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=2991, PETRI_DIFFERENCE_MINUEND_PLACES=192, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=237, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=206, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3326, PETRI_PLACES=200, PETRI_TRANSITIONS=252} [2024-06-21 20:18:17,293 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 148 predicate places. [2024-06-21 20:18:17,293 INFO L495 AbstractCegarLoop]: Abstraction has has 200 places, 252 transitions, 3326 flow [2024-06-21 20:18:17,293 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 19.666666666666668) internal successors, (118), 6 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:18:17,293 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:18:17,293 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:18:17,293 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2024-06-21 20:18:17,293 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 20:18:17,294 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:18:17,294 INFO L85 PathProgramCache]: Analyzing trace with hash 1090784405, now seen corresponding path program 2 times [2024-06-21 20:18:17,294 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:18:17,294 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1811487713] [2024-06-21 20:18:17,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:18:17,294 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:18:17,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:18:17,384 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:18:17,384 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:18:17,384 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1811487713] [2024-06-21 20:18:17,384 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1811487713] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:18:17,385 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:18:17,385 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 20:18:17,385 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [265236398] [2024-06-21 20:18:17,385 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:18:17,385 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 20:18:17,385 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:18:17,386 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 20:18:17,386 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-21 20:18:17,427 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 49 [2024-06-21 20:18:17,427 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 200 places, 252 transitions, 3326 flow. Second operand has 6 states, 6 states have (on average 19.666666666666668) internal successors, (118), 6 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:18:17,427 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:18:17,428 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 49 [2024-06-21 20:18:17,428 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:18:19,180 INFO L124 PetriNetUnfolderBase]: 10206/15364 cut-off events. [2024-06-21 20:18:19,181 INFO L125 PetriNetUnfolderBase]: For 374233/374237 co-relation queries the response was YES. [2024-06-21 20:18:19,288 INFO L83 FinitePrefix]: Finished finitePrefix Result has 97423 conditions, 15364 events. 10206/15364 cut-off events. For 374233/374237 co-relation queries the response was YES. Maximal size of possible extension queue 866. Compared 103477 event pairs, 3624 based on Foata normal form. 5/15364 useless extension candidates. Maximal degree in co-relation 97323. Up to 14430 conditions per place. [2024-06-21 20:18:19,352 INFO L140 encePairwiseOnDemand]: 40/49 looper letters, 226 selfloop transitions, 47 changer transitions 0/282 dead transitions. [2024-06-21 20:18:19,352 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 205 places, 282 transitions, 4233 flow [2024-06-21 20:18:19,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 20:18:19,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 20:18:19,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 173 transitions. [2024-06-21 20:18:19,353 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5884353741496599 [2024-06-21 20:18:19,353 INFO L175 Difference]: Start difference. First operand has 200 places, 252 transitions, 3326 flow. Second operand 6 states and 173 transitions. [2024-06-21 20:18:19,353 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 205 places, 282 transitions, 4233 flow [2024-06-21 20:18:20,789 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 204 places, 282 transitions, 4116 flow, removed 52 selfloop flow, removed 1 redundant places. [2024-06-21 20:18:20,793 INFO L231 Difference]: Finished difference. Result has 206 places, 261 transitions, 3483 flow [2024-06-21 20:18:20,793 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=3237, PETRI_DIFFERENCE_MINUEND_PLACES=199, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=252, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=213, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3483, PETRI_PLACES=206, PETRI_TRANSITIONS=261} [2024-06-21 20:18:20,793 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 154 predicate places. [2024-06-21 20:18:20,794 INFO L495 AbstractCegarLoop]: Abstraction has has 206 places, 261 transitions, 3483 flow [2024-06-21 20:18:20,794 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 19.666666666666668) internal successors, (118), 6 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:18:20,794 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:18:20,794 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:18:20,794 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2024-06-21 20:18:20,794 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 20:18:20,794 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:18:20,795 INFO L85 PathProgramCache]: Analyzing trace with hash -1227032649, now seen corresponding path program 3 times [2024-06-21 20:18:20,795 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:18:20,795 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1296642481] [2024-06-21 20:18:20,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:18:20,795 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:18:20,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:18:20,892 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:18:20,892 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:18:20,892 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1296642481] [2024-06-21 20:18:20,893 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1296642481] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:18:20,893 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:18:20,893 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 20:18:20,893 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1556159007] [2024-06-21 20:18:20,893 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:18:20,893 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 20:18:20,893 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:18:20,894 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 20:18:20,894 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-21 20:18:20,946 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 49 [2024-06-21 20:18:20,946 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 206 places, 261 transitions, 3483 flow. Second operand has 6 states, 6 states have (on average 19.666666666666668) internal successors, (118), 6 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:18:20,946 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:18:20,946 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 49 [2024-06-21 20:18:20,946 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:18:22,711 INFO L124 PetriNetUnfolderBase]: 10180/15326 cut-off events. [2024-06-21 20:18:22,711 INFO L125 PetriNetUnfolderBase]: For 385388/385388 co-relation queries the response was YES. [2024-06-21 20:18:22,831 INFO L83 FinitePrefix]: Finished finitePrefix Result has 97265 conditions, 15326 events. 10180/15326 cut-off events. For 385388/385388 co-relation queries the response was YES. Maximal size of possible extension queue 864. Compared 103174 event pairs, 3617 based on Foata normal form. 8/15329 useless extension candidates. Maximal degree in co-relation 97162. Up to 14414 conditions per place. [2024-06-21 20:18:22,895 INFO L140 encePairwiseOnDemand]: 41/49 looper letters, 248 selfloop transitions, 22 changer transitions 0/279 dead transitions. [2024-06-21 20:18:22,895 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 211 places, 279 transitions, 4104 flow [2024-06-21 20:18:22,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 20:18:22,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 20:18:22,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 164 transitions. [2024-06-21 20:18:22,896 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5578231292517006 [2024-06-21 20:18:22,896 INFO L175 Difference]: Start difference. First operand has 206 places, 261 transitions, 3483 flow. Second operand 6 states and 164 transitions. [2024-06-21 20:18:22,896 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 211 places, 279 transitions, 4104 flow [2024-06-21 20:18:24,583 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 209 places, 279 transitions, 4014 flow, removed 19 selfloop flow, removed 2 redundant places. [2024-06-21 20:18:24,587 INFO L231 Difference]: Finished difference. Result has 210 places, 262 transitions, 3458 flow [2024-06-21 20:18:24,587 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=3395, PETRI_DIFFERENCE_MINUEND_PLACES=204, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=261, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=239, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3458, PETRI_PLACES=210, PETRI_TRANSITIONS=262} [2024-06-21 20:18:24,588 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 158 predicate places. [2024-06-21 20:18:24,588 INFO L495 AbstractCegarLoop]: Abstraction has has 210 places, 262 transitions, 3458 flow [2024-06-21 20:18:24,588 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 19.666666666666668) internal successors, (118), 6 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:18:24,588 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:18:24,588 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:18:24,588 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2024-06-21 20:18:24,589 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 20:18:24,589 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:18:24,589 INFO L85 PathProgramCache]: Analyzing trace with hash -2035623001, now seen corresponding path program 3 times [2024-06-21 20:18:24,589 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:18:24,589 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1599734809] [2024-06-21 20:18:24,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:18:24,589 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:18:24,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:18:24,696 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:18:24,696 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:18:24,696 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1599734809] [2024-06-21 20:18:24,697 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1599734809] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:18:24,697 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:18:24,697 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 20:18:24,697 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [314118676] [2024-06-21 20:18:24,697 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:18:24,697 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 20:18:24,697 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:18:24,698 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 20:18:24,698 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-21 20:18:24,719 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 49 [2024-06-21 20:18:24,720 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 210 places, 262 transitions, 3458 flow. Second operand has 6 states, 6 states have (on average 19.666666666666668) internal successors, (118), 6 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:18:24,720 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:18:24,720 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 49 [2024-06-21 20:18:24,720 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:18:26,526 INFO L124 PetriNetUnfolderBase]: 10176/15325 cut-off events. [2024-06-21 20:18:26,527 INFO L125 PetriNetUnfolderBase]: For 390460/390464 co-relation queries the response was YES. [2024-06-21 20:18:26,663 INFO L83 FinitePrefix]: Finished finitePrefix Result has 97397 conditions, 15325 events. 10176/15325 cut-off events. For 390460/390464 co-relation queries the response was YES. Maximal size of possible extension queue 864. Compared 103216 event pairs, 3616 based on Foata normal form. 5/15325 useless extension candidates. Maximal degree in co-relation 97293. Up to 14411 conditions per place. [2024-06-21 20:18:26,731 INFO L140 encePairwiseOnDemand]: 40/49 looper letters, 237 selfloop transitions, 35 changer transitions 0/281 dead transitions. [2024-06-21 20:18:26,732 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 214 places, 281 transitions, 4134 flow [2024-06-21 20:18:26,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-21 20:18:26,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-21 20:18:26,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 150 transitions. [2024-06-21 20:18:26,733 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6122448979591837 [2024-06-21 20:18:26,733 INFO L175 Difference]: Start difference. First operand has 210 places, 262 transitions, 3458 flow. Second operand 5 states and 150 transitions. [2024-06-21 20:18:26,733 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 214 places, 281 transitions, 4134 flow [2024-06-21 20:18:28,645 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 210 places, 281 transitions, 4060 flow, removed 17 selfloop flow, removed 4 redundant places. [2024-06-21 20:18:28,649 INFO L231 Difference]: Finished difference. Result has 211 places, 262 transitions, 3466 flow [2024-06-21 20:18:28,649 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=3384, PETRI_DIFFERENCE_MINUEND_PLACES=206, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=262, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=227, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=3466, PETRI_PLACES=211, PETRI_TRANSITIONS=262} [2024-06-21 20:18:28,649 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 159 predicate places. [2024-06-21 20:18:28,649 INFO L495 AbstractCegarLoop]: Abstraction has has 211 places, 262 transitions, 3466 flow [2024-06-21 20:18:28,650 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 19.666666666666668) internal successors, (118), 6 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:18:28,650 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:18:28,650 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:18:28,650 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2024-06-21 20:18:28,650 INFO L420 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 20:18:28,651 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:18:28,651 INFO L85 PathProgramCache]: Analyzing trace with hash -346065129, now seen corresponding path program 4 times [2024-06-21 20:18:28,651 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:18:28,651 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [543716073] [2024-06-21 20:18:28,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:18:28,651 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:18:28,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:18:28,765 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:18:28,766 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:18:28,766 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [543716073] [2024-06-21 20:18:28,766 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [543716073] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:18:28,766 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:18:28,766 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 20:18:28,766 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1091830454] [2024-06-21 20:18:28,766 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:18:28,767 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 20:18:28,767 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:18:28,767 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 20:18:28,767 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-21 20:18:28,796 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 49 [2024-06-21 20:18:28,796 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 211 places, 262 transitions, 3466 flow. Second operand has 6 states, 6 states have (on average 19.666666666666668) internal successors, (118), 6 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:18:28,796 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:18:28,796 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 49 [2024-06-21 20:18:28,796 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:18:30,586 INFO L124 PetriNetUnfolderBase]: 10172/15322 cut-off events. [2024-06-21 20:18:30,587 INFO L125 PetriNetUnfolderBase]: For 401214/401218 co-relation queries the response was YES. [2024-06-21 20:18:30,720 INFO L83 FinitePrefix]: Finished finitePrefix Result has 97564 conditions, 15322 events. 10172/15322 cut-off events. For 401214/401218 co-relation queries the response was YES. Maximal size of possible extension queue 864. Compared 103171 event pairs, 3614 based on Foata normal form. 5/15324 useless extension candidates. Maximal degree in co-relation 97459. Up to 14407 conditions per place. [2024-06-21 20:18:30,786 INFO L140 encePairwiseOnDemand]: 40/49 looper letters, 236 selfloop transitions, 39 changer transitions 0/284 dead transitions. [2024-06-21 20:18:30,787 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 217 places, 284 transitions, 4100 flow [2024-06-21 20:18:30,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 20:18:30,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 20:18:30,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 193 transitions. [2024-06-21 20:18:30,788 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5626822157434402 [2024-06-21 20:18:30,788 INFO L175 Difference]: Start difference. First operand has 211 places, 262 transitions, 3466 flow. Second operand 7 states and 193 transitions. [2024-06-21 20:18:30,788 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 217 places, 284 transitions, 4100 flow [2024-06-21 20:18:32,981 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 213 places, 284 transitions, 3979 flow, removed 18 selfloop flow, removed 4 redundant places. [2024-06-21 20:18:32,985 INFO L231 Difference]: Finished difference. Result has 214 places, 264 transitions, 3469 flow [2024-06-21 20:18:32,985 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=3361, PETRI_DIFFERENCE_MINUEND_PLACES=207, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=262, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=225, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3469, PETRI_PLACES=214, PETRI_TRANSITIONS=264} [2024-06-21 20:18:32,985 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 162 predicate places. [2024-06-21 20:18:32,985 INFO L495 AbstractCegarLoop]: Abstraction has has 214 places, 264 transitions, 3469 flow [2024-06-21 20:18:32,986 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 19.666666666666668) internal successors, (118), 6 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:18:32,986 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:18:32,986 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:18:32,986 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2024-06-21 20:18:32,986 INFO L420 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 20:18:32,986 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:18:32,986 INFO L85 PathProgramCache]: Analyzing trace with hash 1356135023, now seen corresponding path program 5 times [2024-06-21 20:18:32,986 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:18:32,987 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [958348799] [2024-06-21 20:18:32,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:18:32,987 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:18:32,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:18:33,084 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:18:33,084 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:18:33,084 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [958348799] [2024-06-21 20:18:33,085 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [958348799] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:18:33,085 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:18:33,085 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 20:18:33,085 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [619877161] [2024-06-21 20:18:33,085 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:18:33,085 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 20:18:33,085 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:18:33,086 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 20:18:33,086 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-21 20:18:33,117 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 49 [2024-06-21 20:18:33,117 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 214 places, 264 transitions, 3469 flow. Second operand has 6 states, 6 states have (on average 19.666666666666668) internal successors, (118), 6 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:18:33,117 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:18:33,118 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 49 [2024-06-21 20:18:33,118 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:18:35,021 INFO L124 PetriNetUnfolderBase]: 10168/15312 cut-off events. [2024-06-21 20:18:35,021 INFO L125 PetriNetUnfolderBase]: For 413061/413065 co-relation queries the response was YES. [2024-06-21 20:18:35,127 INFO L83 FinitePrefix]: Finished finitePrefix Result has 97739 conditions, 15312 events. 10168/15312 cut-off events. For 413061/413065 co-relation queries the response was YES. Maximal size of possible extension queue 864. Compared 103114 event pairs, 3629 based on Foata normal form. 5/15312 useless extension candidates. Maximal degree in co-relation 97633. Up to 14384 conditions per place. [2024-06-21 20:18:35,190 INFO L140 encePairwiseOnDemand]: 40/49 looper letters, 219 selfloop transitions, 51 changer transitions 0/279 dead transitions. [2024-06-21 20:18:35,191 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 219 places, 279 transitions, 4067 flow [2024-06-21 20:18:35,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 20:18:35,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 20:18:35,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 165 transitions. [2024-06-21 20:18:35,192 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5612244897959183 [2024-06-21 20:18:35,192 INFO L175 Difference]: Start difference. First operand has 214 places, 264 transitions, 3469 flow. Second operand 6 states and 165 transitions. [2024-06-21 20:18:35,192 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 219 places, 279 transitions, 4067 flow [2024-06-21 20:18:37,091 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 214 places, 279 transitions, 3951 flow, removed 19 selfloop flow, removed 5 redundant places. [2024-06-21 20:18:37,095 INFO L231 Difference]: Finished difference. Result has 215 places, 266 transitions, 3488 flow [2024-06-21 20:18:37,095 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=3365, PETRI_DIFFERENCE_MINUEND_PLACES=209, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=264, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=215, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3488, PETRI_PLACES=215, PETRI_TRANSITIONS=266} [2024-06-21 20:18:37,095 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 163 predicate places. [2024-06-21 20:18:37,095 INFO L495 AbstractCegarLoop]: Abstraction has has 215 places, 266 transitions, 3488 flow [2024-06-21 20:18:37,096 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 19.666666666666668) internal successors, (118), 6 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:18:37,096 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:18:37,096 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:18:37,096 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2024-06-21 20:18:37,096 INFO L420 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 20:18:37,096 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:18:37,096 INFO L85 PathProgramCache]: Analyzing trace with hash 1368523119, now seen corresponding path program 1 times [2024-06-21 20:18:37,097 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:18:37,097 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1381223609] [2024-06-21 20:18:37,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:18:37,097 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:18:37,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:18:37,196 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:18:37,197 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:18:37,197 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1381223609] [2024-06-21 20:18:37,197 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1381223609] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:18:37,197 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:18:37,197 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 20:18:37,197 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [634926158] [2024-06-21 20:18:37,198 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:18:37,198 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 20:18:37,198 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:18:37,198 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 20:18:37,198 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-21 20:18:37,226 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 49 [2024-06-21 20:18:37,227 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 215 places, 266 transitions, 3488 flow. Second operand has 6 states, 6 states have (on average 19.666666666666668) internal successors, (118), 6 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:18:37,227 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:18:37,227 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 49 [2024-06-21 20:18:37,227 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:18:39,221 INFO L124 PetriNetUnfolderBase]: 10149/15274 cut-off events. [2024-06-21 20:18:39,222 INFO L125 PetriNetUnfolderBase]: For 423908/423908 co-relation queries the response was YES. [2024-06-21 20:18:39,357 INFO L83 FinitePrefix]: Finished finitePrefix Result has 97556 conditions, 15274 events. 10149/15274 cut-off events. For 423908/423908 co-relation queries the response was YES. Maximal size of possible extension queue 861. Compared 102660 event pairs, 3591 based on Foata normal form. 6/15275 useless extension candidates. Maximal degree in co-relation 97449. Up to 14312 conditions per place. [2024-06-21 20:18:39,422 INFO L140 encePairwiseOnDemand]: 41/49 looper letters, 254 selfloop transitions, 28 changer transitions 0/291 dead transitions. [2024-06-21 20:18:39,422 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 220 places, 291 transitions, 4222 flow [2024-06-21 20:18:39,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 20:18:39,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 20:18:39,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 166 transitions. [2024-06-21 20:18:39,423 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.564625850340136 [2024-06-21 20:18:39,424 INFO L175 Difference]: Start difference. First operand has 215 places, 266 transitions, 3488 flow. Second operand 6 states and 166 transitions. [2024-06-21 20:18:39,424 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 220 places, 291 transitions, 4222 flow [2024-06-21 20:18:41,492 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 217 places, 291 transitions, 4136 flow, removed 3 selfloop flow, removed 3 redundant places. [2024-06-21 20:18:41,496 INFO L231 Difference]: Finished difference. Result has 219 places, 271 transitions, 3563 flow [2024-06-21 20:18:41,496 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=3402, PETRI_DIFFERENCE_MINUEND_PLACES=212, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=266, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=239, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3563, PETRI_PLACES=219, PETRI_TRANSITIONS=271} [2024-06-21 20:18:41,496 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 167 predicate places. [2024-06-21 20:18:41,496 INFO L495 AbstractCegarLoop]: Abstraction has has 219 places, 271 transitions, 3563 flow [2024-06-21 20:18:41,496 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 19.666666666666668) internal successors, (118), 6 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:18:41,497 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:18:41,497 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:18:41,497 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2024-06-21 20:18:41,497 INFO L420 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 20:18:41,497 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:18:41,497 INFO L85 PathProgramCache]: Analyzing trace with hash -1284841095, now seen corresponding path program 1 times [2024-06-21 20:18:41,497 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:18:41,498 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1498991914] [2024-06-21 20:18:41,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:18:41,498 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:18:41,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:18:41,607 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:18:41,607 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:18:41,607 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1498991914] [2024-06-21 20:18:41,608 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1498991914] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:18:41,608 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:18:41,608 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 20:18:41,608 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [339011052] [2024-06-21 20:18:41,608 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:18:41,608 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 20:18:41,608 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:18:41,609 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 20:18:41,609 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-21 20:18:41,664 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 49 [2024-06-21 20:18:41,664 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 219 places, 271 transitions, 3563 flow. Second operand has 7 states, 7 states have (on average 19.428571428571427) internal successors, (136), 7 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:18:41,664 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:18:41,664 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 49 [2024-06-21 20:18:41,664 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:18:43,943 INFO L124 PetriNetUnfolderBase]: 10350/15583 cut-off events. [2024-06-21 20:18:43,943 INFO L125 PetriNetUnfolderBase]: For 452145/452152 co-relation queries the response was YES. [2024-06-21 20:18:44,050 INFO L83 FinitePrefix]: Finished finitePrefix Result has 100972 conditions, 15583 events. 10350/15583 cut-off events. For 452145/452152 co-relation queries the response was YES. Maximal size of possible extension queue 869. Compared 105042 event pairs, 3641 based on Foata normal form. 7/15582 useless extension candidates. Maximal degree in co-relation 100862. Up to 14377 conditions per place. [2024-06-21 20:18:44,114 INFO L140 encePairwiseOnDemand]: 37/49 looper letters, 206 selfloop transitions, 110 changer transitions 0/325 dead transitions. [2024-06-21 20:18:44,114 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 224 places, 325 transitions, 4881 flow [2024-06-21 20:18:44,114 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 20:18:44,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 20:18:44,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 184 transitions. [2024-06-21 20:18:44,115 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6258503401360545 [2024-06-21 20:18:44,115 INFO L175 Difference]: Start difference. First operand has 219 places, 271 transitions, 3563 flow. Second operand 6 states and 184 transitions. [2024-06-21 20:18:44,115 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 224 places, 325 transitions, 4881 flow [2024-06-21 20:18:46,545 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 222 places, 325 transitions, 4824 flow, removed 18 selfloop flow, removed 2 redundant places. [2024-06-21 20:18:46,548 INFO L231 Difference]: Finished difference. Result has 224 places, 303 transitions, 4369 flow [2024-06-21 20:18:46,549 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=3506, PETRI_DIFFERENCE_MINUEND_PLACES=217, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=271, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=84, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=169, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=4369, PETRI_PLACES=224, PETRI_TRANSITIONS=303} [2024-06-21 20:18:46,549 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 172 predicate places. [2024-06-21 20:18:46,549 INFO L495 AbstractCegarLoop]: Abstraction has has 224 places, 303 transitions, 4369 flow [2024-06-21 20:18:46,550 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.428571428571427) internal successors, (136), 7 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:18:46,550 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:18:46,550 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:18:46,550 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2024-06-21 20:18:46,550 INFO L420 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 20:18:46,550 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:18:46,551 INFO L85 PathProgramCache]: Analyzing trace with hash -688533393, now seen corresponding path program 2 times [2024-06-21 20:18:46,551 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:18:46,551 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1370183455] [2024-06-21 20:18:46,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:18:46,551 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:18:46,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:18:46,659 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:18:46,660 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:18:46,660 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1370183455] [2024-06-21 20:18:46,660 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1370183455] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:18:46,660 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:18:46,660 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 20:18:46,660 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1525599881] [2024-06-21 20:18:46,661 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:18:46,661 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 20:18:46,661 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:18:46,661 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 20:18:46,661 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-21 20:18:46,710 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 49 [2024-06-21 20:18:46,710 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 224 places, 303 transitions, 4369 flow. Second operand has 7 states, 7 states have (on average 19.428571428571427) internal successors, (136), 7 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:18:46,710 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:18:46,710 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 49 [2024-06-21 20:18:46,710 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:18:48,934 INFO L124 PetriNetUnfolderBase]: 10326/15553 cut-off events. [2024-06-21 20:18:48,934 INFO L125 PetriNetUnfolderBase]: For 488836/488843 co-relation queries the response was YES. [2024-06-21 20:18:49,062 INFO L83 FinitePrefix]: Finished finitePrefix Result has 106145 conditions, 15553 events. 10326/15553 cut-off events. For 488836/488843 co-relation queries the response was YES. Maximal size of possible extension queue 867. Compared 104893 event pairs, 3641 based on Foata normal form. 7/15552 useless extension candidates. Maximal degree in co-relation 106032. Up to 14353 conditions per place. [2024-06-21 20:18:49,131 INFO L140 encePairwiseOnDemand]: 37/49 looper letters, 206 selfloop transitions, 112 changer transitions 0/327 dead transitions. [2024-06-21 20:18:49,131 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 230 places, 327 transitions, 5143 flow [2024-06-21 20:18:49,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 20:18:49,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 20:18:49,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 208 transitions. [2024-06-21 20:18:49,132 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6064139941690962 [2024-06-21 20:18:49,132 INFO L175 Difference]: Start difference. First operand has 224 places, 303 transitions, 4369 flow. Second operand 7 states and 208 transitions. [2024-06-21 20:18:49,132 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 230 places, 327 transitions, 5143 flow [2024-06-21 20:18:51,907 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 227 places, 327 transitions, 4886 flow, removed 96 selfloop flow, removed 3 redundant places. [2024-06-21 20:18:51,911 INFO L231 Difference]: Finished difference. Result has 228 places, 305 transitions, 4404 flow [2024-06-21 20:18:51,911 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=4134, PETRI_DIFFERENCE_MINUEND_PLACES=221, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=303, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=110, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=193, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4404, PETRI_PLACES=228, PETRI_TRANSITIONS=305} [2024-06-21 20:18:51,911 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 176 predicate places. [2024-06-21 20:18:51,911 INFO L495 AbstractCegarLoop]: Abstraction has has 228 places, 305 transitions, 4404 flow [2024-06-21 20:18:51,912 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.428571428571427) internal successors, (136), 7 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:18:51,912 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:18:51,912 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:18:51,912 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2024-06-21 20:18:51,912 INFO L420 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 20:18:51,912 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:18:51,912 INFO L85 PathProgramCache]: Analyzing trace with hash -688981839, now seen corresponding path program 1 times [2024-06-21 20:18:51,913 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:18:51,913 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [540061165] [2024-06-21 20:18:51,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:18:51,913 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:18:51,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:18:52,021 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:18:52,022 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:18:52,022 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [540061165] [2024-06-21 20:18:52,022 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [540061165] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:18:52,022 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:18:52,022 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 20:18:52,022 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2095445947] [2024-06-21 20:18:52,023 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:18:52,023 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 20:18:52,023 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:18:52,023 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 20:18:52,023 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-21 20:18:52,073 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 49 [2024-06-21 20:18:52,073 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 228 places, 305 transitions, 4404 flow. Second operand has 7 states, 7 states have (on average 20.428571428571427) internal successors, (143), 7 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:18:52,073 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:18:52,073 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 49 [2024-06-21 20:18:52,074 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:18:54,980 INFO L124 PetriNetUnfolderBase]: 10329/15599 cut-off events. [2024-06-21 20:18:54,981 INFO L125 PetriNetUnfolderBase]: For 514373/514384 co-relation queries the response was YES. [2024-06-21 20:18:55,117 INFO L83 FinitePrefix]: Finished finitePrefix Result has 104881 conditions, 15599 events. 10329/15599 cut-off events. For 514373/514384 co-relation queries the response was YES. Maximal size of possible extension queue 875. Compared 105792 event pairs, 2856 based on Foata normal form. 56/15440 useless extension candidates. Maximal degree in co-relation 104767. Up to 13471 conditions per place. [2024-06-21 20:18:55,285 INFO L140 encePairwiseOnDemand]: 40/49 looper letters, 242 selfloop transitions, 66 changer transitions 0/351 dead transitions. [2024-06-21 20:18:55,286 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 233 places, 351 transitions, 5402 flow [2024-06-21 20:18:55,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 20:18:55,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 20:18:55,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 190 transitions. [2024-06-21 20:18:55,287 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6462585034013606 [2024-06-21 20:18:55,287 INFO L175 Difference]: Start difference. First operand has 228 places, 305 transitions, 4404 flow. Second operand 6 states and 190 transitions. [2024-06-21 20:18:55,287 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 233 places, 351 transitions, 5402 flow [2024-06-21 20:18:57,284 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 226 places, 351 transitions, 5128 flow, removed 15 selfloop flow, removed 7 redundant places. [2024-06-21 20:18:57,289 INFO L231 Difference]: Finished difference. Result has 228 places, 316 transitions, 4466 flow [2024-06-21 20:18:57,289 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=4130, PETRI_DIFFERENCE_MINUEND_PLACES=221, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=305, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=57, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=241, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=4466, PETRI_PLACES=228, PETRI_TRANSITIONS=316} [2024-06-21 20:18:57,290 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 176 predicate places. [2024-06-21 20:18:57,290 INFO L495 AbstractCegarLoop]: Abstraction has has 228 places, 316 transitions, 4466 flow [2024-06-21 20:18:57,290 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 20.428571428571427) internal successors, (143), 7 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:18:57,290 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:18:57,290 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:18:57,290 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2024-06-21 20:18:57,290 INFO L420 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 20:18:57,291 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:18:57,291 INFO L85 PathProgramCache]: Analyzing trace with hash -2034087527, now seen corresponding path program 3 times [2024-06-21 20:18:57,291 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:18:57,291 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [673606793] [2024-06-21 20:18:57,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:18:57,291 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:18:57,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:18:57,400 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:18:57,400 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:18:57,400 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [673606793] [2024-06-21 20:18:57,400 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [673606793] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:18:57,400 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:18:57,401 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 20:18:57,401 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [800770938] [2024-06-21 20:18:57,401 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:18:57,401 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 20:18:57,401 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:18:57,401 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 20:18:57,402 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-21 20:18:57,433 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 49 [2024-06-21 20:18:57,434 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 228 places, 316 transitions, 4466 flow. Second operand has 7 states, 7 states have (on average 19.428571428571427) internal successors, (136), 7 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:18:57,434 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:18:57,434 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 49 [2024-06-21 20:18:57,434 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:19:00,095 INFO L124 PetriNetUnfolderBase]: 10655/16071 cut-off events. [2024-06-21 20:19:00,095 INFO L125 PetriNetUnfolderBase]: For 466791/466794 co-relation queries the response was YES. [2024-06-21 20:19:00,223 INFO L83 FinitePrefix]: Finished finitePrefix Result has 108939 conditions, 16071 events. 10655/16071 cut-off events. For 466791/466794 co-relation queries the response was YES. Maximal size of possible extension queue 891. Compared 108877 event pairs, 3696 based on Foata normal form. 1/16065 useless extension candidates. Maximal degree in co-relation 108825. Up to 14957 conditions per place. [2024-06-21 20:19:00,296 INFO L140 encePairwiseOnDemand]: 39/49 looper letters, 277 selfloop transitions, 77 changer transitions 0/363 dead transitions. [2024-06-21 20:19:00,296 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 236 places, 363 transitions, 5639 flow [2024-06-21 20:19:00,296 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 20:19:00,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 20:19:00,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 247 transitions. [2024-06-21 20:19:00,297 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5600907029478458 [2024-06-21 20:19:00,297 INFO L175 Difference]: Start difference. First operand has 228 places, 316 transitions, 4466 flow. Second operand 9 states and 247 transitions. [2024-06-21 20:19:00,297 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 236 places, 363 transitions, 5639 flow [2024-06-21 20:19:02,689 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 234 places, 363 transitions, 5549 flow, removed 16 selfloop flow, removed 2 redundant places. [2024-06-21 20:19:02,694 INFO L231 Difference]: Finished difference. Result has 237 places, 334 transitions, 4913 flow [2024-06-21 20:19:02,694 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=4379, PETRI_DIFFERENCE_MINUEND_PLACES=226, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=316, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=63, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=244, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4913, PETRI_PLACES=237, PETRI_TRANSITIONS=334} [2024-06-21 20:19:02,695 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 185 predicate places. [2024-06-21 20:19:02,695 INFO L495 AbstractCegarLoop]: Abstraction has has 237 places, 334 transitions, 4913 flow [2024-06-21 20:19:02,695 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.428571428571427) internal successors, (136), 7 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:19:02,695 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:19:02,695 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:19:02,695 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2024-06-21 20:19:02,696 INFO L420 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 20:19:02,696 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:19:02,696 INFO L85 PathProgramCache]: Analyzing trace with hash 1947195419, now seen corresponding path program 4 times [2024-06-21 20:19:02,696 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:19:02,696 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [399872454] [2024-06-21 20:19:02,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:19:02,696 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:19:02,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:19:02,871 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:19:02,871 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:19:02,871 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [399872454] [2024-06-21 20:19:02,871 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [399872454] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:19:02,872 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:19:02,872 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 20:19:02,872 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1538686118] [2024-06-21 20:19:02,872 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:19:02,872 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 20:19:02,872 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:19:02,873 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 20:19:02,873 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-21 20:19:02,917 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 49 [2024-06-21 20:19:02,917 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 237 places, 334 transitions, 4913 flow. Second operand has 7 states, 7 states have (on average 19.428571428571427) internal successors, (136), 7 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:19:02,917 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:19:02,917 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 49 [2024-06-21 20:19:02,918 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:19:05,698 INFO L124 PetriNetUnfolderBase]: 10662/16052 cut-off events. [2024-06-21 20:19:05,698 INFO L125 PetriNetUnfolderBase]: For 493486/493489 co-relation queries the response was YES. [2024-06-21 20:19:05,837 INFO L83 FinitePrefix]: Finished finitePrefix Result has 111408 conditions, 16052 events. 10662/16052 cut-off events. For 493486/493489 co-relation queries the response was YES. Maximal size of possible extension queue 887. Compared 108529 event pairs, 3656 based on Foata normal form. 1/16046 useless extension candidates. Maximal degree in co-relation 111290. Up to 14965 conditions per place. [2024-06-21 20:19:05,933 INFO L140 encePairwiseOnDemand]: 39/49 looper letters, 273 selfloop transitions, 78 changer transitions 0/360 dead transitions. [2024-06-21 20:19:05,934 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 244 places, 360 transitions, 5853 flow [2024-06-21 20:19:05,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:19:05,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:19:05,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 221 transitions. [2024-06-21 20:19:05,935 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5637755102040817 [2024-06-21 20:19:05,935 INFO L175 Difference]: Start difference. First operand has 237 places, 334 transitions, 4913 flow. Second operand 8 states and 221 transitions. [2024-06-21 20:19:05,935 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 244 places, 360 transitions, 5853 flow [2024-06-21 20:19:08,498 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 240 places, 360 transitions, 5617 flow, removed 88 selfloop flow, removed 4 redundant places. [2024-06-21 20:19:08,502 INFO L231 Difference]: Finished difference. Result has 241 places, 338 transitions, 4931 flow [2024-06-21 20:19:08,503 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=4715, PETRI_DIFFERENCE_MINUEND_PLACES=233, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=334, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=74, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=260, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4931, PETRI_PLACES=241, PETRI_TRANSITIONS=338} [2024-06-21 20:19:08,503 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 189 predicate places. [2024-06-21 20:19:08,503 INFO L495 AbstractCegarLoop]: Abstraction has has 241 places, 338 transitions, 4931 flow [2024-06-21 20:19:08,503 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.428571428571427) internal successors, (136), 7 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:19:08,503 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:19:08,503 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:19:08,504 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2024-06-21 20:19:08,504 INFO L420 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 20:19:08,506 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:19:08,506 INFO L85 PathProgramCache]: Analyzing trace with hash -387973391, now seen corresponding path program 1 times [2024-06-21 20:19:08,506 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:19:08,506 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1072351508] [2024-06-21 20:19:08,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:19:08,506 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:19:08,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:19:08,646 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:19:08,646 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:19:08,646 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1072351508] [2024-06-21 20:19:08,646 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1072351508] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:19:08,646 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:19:08,647 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 20:19:08,647 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [106522497] [2024-06-21 20:19:08,647 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:19:08,647 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 20:19:08,647 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:19:08,647 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 20:19:08,648 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 20:19:08,712 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 49 [2024-06-21 20:19:08,713 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 241 places, 338 transitions, 4931 flow. Second operand has 9 states, 9 states have (on average 18.77777777777778) internal successors, (169), 9 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:19:08,713 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:19:08,713 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 49 [2024-06-21 20:19:08,713 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:19:11,484 INFO L124 PetriNetUnfolderBase]: 10845/16377 cut-off events. [2024-06-21 20:19:11,484 INFO L125 PetriNetUnfolderBase]: For 530165/530172 co-relation queries the response was YES. [2024-06-21 20:19:11,626 INFO L83 FinitePrefix]: Finished finitePrefix Result has 113118 conditions, 16377 events. 10845/16377 cut-off events. For 530165/530172 co-relation queries the response was YES. Maximal size of possible extension queue 905. Compared 110415 event pairs, 2018 based on Foata normal form. 37/16406 useless extension candidates. Maximal degree in co-relation 112999. Up to 10890 conditions per place. [2024-06-21 20:19:11,710 INFO L140 encePairwiseOnDemand]: 39/49 looper letters, 297 selfloop transitions, 90 changer transitions 0/396 dead transitions. [2024-06-21 20:19:11,710 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 247 places, 396 transitions, 6222 flow [2024-06-21 20:19:11,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 20:19:11,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 20:19:11,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 227 transitions. [2024-06-21 20:19:11,714 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6618075801749271 [2024-06-21 20:19:11,714 INFO L175 Difference]: Start difference. First operand has 241 places, 338 transitions, 4931 flow. Second operand 7 states and 227 transitions. [2024-06-21 20:19:11,714 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 247 places, 396 transitions, 6222 flow [2024-06-21 20:19:14,738 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 243 places, 396 transitions, 6079 flow, removed 18 selfloop flow, removed 4 redundant places. [2024-06-21 20:19:14,743 INFO L231 Difference]: Finished difference. Result has 244 places, 339 transitions, 5004 flow [2024-06-21 20:19:14,743 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=4788, PETRI_DIFFERENCE_MINUEND_PLACES=237, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=338, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=89, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=249, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5004, PETRI_PLACES=244, PETRI_TRANSITIONS=339} [2024-06-21 20:19:14,743 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 192 predicate places. [2024-06-21 20:19:14,744 INFO L495 AbstractCegarLoop]: Abstraction has has 244 places, 339 transitions, 5004 flow [2024-06-21 20:19:14,744 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 18.77777777777778) internal successors, (169), 9 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:19:14,744 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:19:14,745 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:19:14,745 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2024-06-21 20:19:14,745 INFO L420 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 20:19:14,745 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:19:14,745 INFO L85 PathProgramCache]: Analyzing trace with hash -1429937359, now seen corresponding path program 2 times [2024-06-21 20:19:14,745 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:19:14,745 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1421853018] [2024-06-21 20:19:14,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:19:14,746 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:19:14,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:19:14,914 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:19:14,914 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:19:14,914 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1421853018] [2024-06-21 20:19:14,914 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1421853018] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:19:14,915 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:19:14,915 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 20:19:14,915 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [388753331] [2024-06-21 20:19:14,915 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:19:14,915 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 20:19:14,930 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:19:14,930 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 20:19:14,930 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-21 20:19:15,022 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 49 [2024-06-21 20:19:15,022 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 244 places, 339 transitions, 5004 flow. Second operand has 9 states, 9 states have (on average 18.77777777777778) internal successors, (169), 9 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:19:15,023 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:19:15,023 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 49 [2024-06-21 20:19:15,023 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:19:17,851 INFO L124 PetriNetUnfolderBase]: 10761/16257 cut-off events. [2024-06-21 20:19:17,852 INFO L125 PetriNetUnfolderBase]: For 524380/524387 co-relation queries the response was YES. [2024-06-21 20:19:18,005 INFO L83 FinitePrefix]: Finished finitePrefix Result has 112352 conditions, 16257 events. 10761/16257 cut-off events. For 524380/524387 co-relation queries the response was YES. Maximal size of possible extension queue 897. Compared 109926 event pairs, 2996 based on Foata normal form. 37/16286 useless extension candidates. Maximal degree in co-relation 112232. Up to 14364 conditions per place. [2024-06-21 20:19:18,090 INFO L140 encePairwiseOnDemand]: 41/49 looper letters, 327 selfloop transitions, 39 changer transitions 0/375 dead transitions. [2024-06-21 20:19:18,091 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 248 places, 375 transitions, 5858 flow [2024-06-21 20:19:18,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 20:19:18,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 20:19:18,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 185 transitions. [2024-06-21 20:19:18,092 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6292517006802721 [2024-06-21 20:19:18,092 INFO L175 Difference]: Start difference. First operand has 244 places, 339 transitions, 5004 flow. Second operand 6 states and 185 transitions. [2024-06-21 20:19:18,092 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 248 places, 375 transitions, 5858 flow [2024-06-21 20:19:20,853 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 243 places, 375 transitions, 5609 flow, removed 14 selfloop flow, removed 5 redundant places. [2024-06-21 20:19:20,857 INFO L231 Difference]: Finished difference. Result has 244 places, 338 transitions, 4782 flow [2024-06-21 20:19:20,858 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=4699, PETRI_DIFFERENCE_MINUEND_PLACES=238, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=338, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=299, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=4782, PETRI_PLACES=244, PETRI_TRANSITIONS=338} [2024-06-21 20:19:20,859 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 192 predicate places. [2024-06-21 20:19:20,859 INFO L495 AbstractCegarLoop]: Abstraction has has 244 places, 338 transitions, 4782 flow [2024-06-21 20:19:20,860 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 18.77777777777778) internal successors, (169), 9 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:19:20,860 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:19:20,860 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:19:20,860 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2024-06-21 20:19:20,860 INFO L420 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 20:19:20,860 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:19:20,861 INFO L85 PathProgramCache]: Analyzing trace with hash -1170102687, now seen corresponding path program 5 times [2024-06-21 20:19:20,861 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:19:20,861 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2095276404] [2024-06-21 20:19:20,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:19:20,861 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:19:20,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:19:21,065 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:19:21,066 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:19:21,066 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2095276404] [2024-06-21 20:19:21,066 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2095276404] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:19:21,066 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:19:21,066 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 20:19:21,066 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1727940114] [2024-06-21 20:19:21,066 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:19:21,066 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 20:19:21,066 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:19:21,067 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 20:19:21,067 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-21 20:19:21,096 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 49 [2024-06-21 20:19:21,096 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 244 places, 338 transitions, 4782 flow. Second operand has 7 states, 7 states have (on average 19.428571428571427) internal successors, (136), 7 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:19:21,096 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:19:21,096 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 49 [2024-06-21 20:19:21,097 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:19:23,652 INFO L124 PetriNetUnfolderBase]: 10757/16216 cut-off events. [2024-06-21 20:19:23,652 INFO L125 PetriNetUnfolderBase]: For 506549/506552 co-relation queries the response was YES. [2024-06-21 20:19:23,772 INFO L83 FinitePrefix]: Finished finitePrefix Result has 110506 conditions, 16216 events. 10757/16216 cut-off events. For 506549/506552 co-relation queries the response was YES. Maximal size of possible extension queue 902. Compared 110005 event pairs, 3730 based on Foata normal form. 1/16206 useless extension candidates. Maximal degree in co-relation 110386. Up to 15114 conditions per place. [2024-06-21 20:19:23,841 INFO L140 encePairwiseOnDemand]: 39/49 looper letters, 268 selfloop transitions, 74 changer transitions 0/351 dead transitions. [2024-06-21 20:19:23,842 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 249 places, 351 transitions, 5498 flow [2024-06-21 20:19:23,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 20:19:23,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 20:19:23,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 167 transitions. [2024-06-21 20:19:23,842 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5680272108843537 [2024-06-21 20:19:23,843 INFO L175 Difference]: Start difference. First operand has 244 places, 338 transitions, 4782 flow. Second operand 6 states and 167 transitions. [2024-06-21 20:19:23,843 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 249 places, 351 transitions, 5498 flow [2024-06-21 20:19:26,208 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 244 places, 351 transitions, 5280 flow, removed 28 selfloop flow, removed 5 redundant places. [2024-06-21 20:19:26,214 INFO L231 Difference]: Finished difference. Result has 245 places, 338 transitions, 4719 flow [2024-06-21 20:19:26,214 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=4564, PETRI_DIFFERENCE_MINUEND_PLACES=239, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=338, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=74, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=264, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=4719, PETRI_PLACES=245, PETRI_TRANSITIONS=338} [2024-06-21 20:19:26,215 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 193 predicate places. [2024-06-21 20:19:26,215 INFO L495 AbstractCegarLoop]: Abstraction has has 245 places, 338 transitions, 4719 flow [2024-06-21 20:19:26,215 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.428571428571427) internal successors, (136), 7 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:19:26,215 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:19:26,216 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:19:26,216 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2024-06-21 20:19:26,216 INFO L420 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 20:19:26,226 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:19:26,227 INFO L85 PathProgramCache]: Analyzing trace with hash 2094959120, now seen corresponding path program 1 times [2024-06-21 20:19:26,227 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:19:26,227 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [690337128] [2024-06-21 20:19:26,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:19:26,227 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:19:26,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:19:26,354 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:19:26,354 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:19:26,355 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [690337128] [2024-06-21 20:19:26,355 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [690337128] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:19:26,355 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:19:26,355 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 20:19:26,355 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [9938211] [2024-06-21 20:19:26,355 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:19:26,355 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 20:19:26,356 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:19:26,356 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 20:19:26,356 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-21 20:19:26,391 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 49 [2024-06-21 20:19:26,391 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 245 places, 338 transitions, 4719 flow. Second operand has 7 states, 7 states have (on average 20.428571428571427) internal successors, (143), 7 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:19:26,391 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:19:26,391 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 49 [2024-06-21 20:19:26,391 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:19:29,126 INFO L124 PetriNetUnfolderBase]: 10358/15689 cut-off events. [2024-06-21 20:19:29,126 INFO L125 PetriNetUnfolderBase]: For 517234/517370 co-relation queries the response was YES. [2024-06-21 20:19:29,270 INFO L83 FinitePrefix]: Finished finitePrefix Result has 105967 conditions, 15689 events. 10358/15689 cut-off events. For 517234/517370 co-relation queries the response was YES. Maximal size of possible extension queue 898. Compared 107205 event pairs, 3540 based on Foata normal form. 18/15487 useless extension candidates. Maximal degree in co-relation 105848. Up to 14363 conditions per place. [2024-06-21 20:19:29,346 INFO L140 encePairwiseOnDemand]: 40/49 looper letters, 264 selfloop transitions, 57 changer transitions 0/354 dead transitions. [2024-06-21 20:19:29,347 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 249 places, 354 transitions, 5467 flow [2024-06-21 20:19:29,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-21 20:19:29,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-21 20:19:29,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 148 transitions. [2024-06-21 20:19:29,348 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6040816326530613 [2024-06-21 20:19:29,348 INFO L175 Difference]: Start difference. First operand has 245 places, 338 transitions, 4719 flow. Second operand 5 states and 148 transitions. [2024-06-21 20:19:29,348 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 249 places, 354 transitions, 5467 flow [2024-06-21 20:19:31,983 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 244 places, 354 transitions, 5310 flow, removed 0 selfloop flow, removed 5 redundant places. [2024-06-21 20:19:31,988 INFO L231 Difference]: Finished difference. Result has 245 places, 342 transitions, 4772 flow [2024-06-21 20:19:31,989 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=4562, PETRI_DIFFERENCE_MINUEND_PLACES=240, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=338, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=281, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=4772, PETRI_PLACES=245, PETRI_TRANSITIONS=342} [2024-06-21 20:19:31,989 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 193 predicate places. [2024-06-21 20:19:31,989 INFO L495 AbstractCegarLoop]: Abstraction has has 245 places, 342 transitions, 4772 flow [2024-06-21 20:19:31,990 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 20.428571428571427) internal successors, (143), 7 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:19:31,990 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:19:31,990 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:19:31,990 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2024-06-21 20:19:31,990 INFO L420 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 20:19:31,990 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:19:31,990 INFO L85 PathProgramCache]: Analyzing trace with hash 1221449691, now seen corresponding path program 6 times [2024-06-21 20:19:31,991 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:19:31,991 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1099990570] [2024-06-21 20:19:31,991 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:19:31,991 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:19:31,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:19:32,106 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:19:32,106 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:19:32,106 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1099990570] [2024-06-21 20:19:32,107 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1099990570] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:19:32,107 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:19:32,107 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 20:19:32,107 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2059467690] [2024-06-21 20:19:32,107 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:19:32,107 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 20:19:32,107 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:19:32,108 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 20:19:32,108 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-21 20:19:32,147 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 49 [2024-06-21 20:19:32,147 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 245 places, 342 transitions, 4772 flow. Second operand has 7 states, 7 states have (on average 19.428571428571427) internal successors, (136), 7 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:19:32,148 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:19:32,148 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 49 [2024-06-21 20:19:32,148 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:19:34,783 INFO L124 PetriNetUnfolderBase]: 10778/16264 cut-off events. [2024-06-21 20:19:34,784 INFO L125 PetriNetUnfolderBase]: For 539381/539384 co-relation queries the response was YES. [2024-06-21 20:19:34,906 INFO L83 FinitePrefix]: Finished finitePrefix Result has 111218 conditions, 16264 events. 10778/16264 cut-off events. For 539381/539384 co-relation queries the response was YES. Maximal size of possible extension queue 900. Compared 110522 event pairs, 3690 based on Foata normal form. 1/16255 useless extension candidates. Maximal degree in co-relation 111098. Up to 15115 conditions per place. [2024-06-21 20:19:34,976 INFO L140 encePairwiseOnDemand]: 39/49 looper letters, 270 selfloop transitions, 96 changer transitions 0/375 dead transitions. [2024-06-21 20:19:34,976 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 251 places, 375 transitions, 5901 flow [2024-06-21 20:19:34,976 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 20:19:34,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 20:19:34,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 196 transitions. [2024-06-21 20:19:34,978 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5714285714285714 [2024-06-21 20:19:34,978 INFO L175 Difference]: Start difference. First operand has 245 places, 342 transitions, 4772 flow. Second operand 7 states and 196 transitions. [2024-06-21 20:19:34,978 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 251 places, 375 transitions, 5901 flow [2024-06-21 20:19:37,460 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 248 places, 375 transitions, 5741 flow, removed 28 selfloop flow, removed 3 redundant places. [2024-06-21 20:19:37,464 INFO L231 Difference]: Finished difference. Result has 250 places, 354 transitions, 5091 flow [2024-06-21 20:19:37,464 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=4612, PETRI_DIFFERENCE_MINUEND_PLACES=242, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=342, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=88, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=251, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5091, PETRI_PLACES=250, PETRI_TRANSITIONS=354} [2024-06-21 20:19:37,465 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 198 predicate places. [2024-06-21 20:19:37,465 INFO L495 AbstractCegarLoop]: Abstraction has has 250 places, 354 transitions, 5091 flow [2024-06-21 20:19:37,467 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.428571428571427) internal successors, (136), 7 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:19:37,467 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:19:37,467 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:19:37,467 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2024-06-21 20:19:37,467 INFO L420 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 20:19:37,467 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:19:37,468 INFO L85 PathProgramCache]: Analyzing trace with hash 2140582203, now seen corresponding path program 7 times [2024-06-21 20:19:37,468 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:19:37,468 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2064590627] [2024-06-21 20:19:37,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:19:37,469 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:19:37,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:19:37,614 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:19:37,614 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:19:37,614 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2064590627] [2024-06-21 20:19:37,614 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2064590627] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:19:37,614 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:19:37,614 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 20:19:37,614 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1438022631] [2024-06-21 20:19:37,614 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:19:37,615 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 20:19:37,615 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:19:37,615 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 20:19:37,615 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-21 20:19:37,663 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 49 [2024-06-21 20:19:37,664 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 250 places, 354 transitions, 5091 flow. Second operand has 7 states, 7 states have (on average 19.428571428571427) internal successors, (136), 7 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:19:37,664 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:19:37,664 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 49 [2024-06-21 20:19:37,664 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand