./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-wmm/safe014_pso.oepc_pso.opt_tso.oepc_tso.opt.i --full-output --witness-type correctness_witness --witnessparser.only.consider.loop.invariants false --validate ./goblint.2024-06-19_11-23-25.files/mutex-meet-nonrel/safe014_pso.oepc_pso.opt_tso.oepc_tso.opt.yml/witness.yml --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 7724a2de Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReachWitnessValidation.xml -i ../../../trunk/examples/svcomp/pthread-wmm/safe014_pso.oepc_pso.opt_tso.oepc_tso.opt.i ./goblint.2024-06-19_11-23-25.files/mutex-meet-nonrel/safe014_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 --- Real Ultimate output --- This is Ultimate 0.2.4-tmp.fs.goblint-validation-7724a2d-m [2024-06-28 00:55:48,160 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-28 00:55:48,229 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-28 00:55:48,233 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-28 00:55:48,233 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-28 00:55:48,258 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-28 00:55:48,260 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-28 00:55:48,260 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-28 00:55:48,261 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-28 00:55:48,265 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-28 00:55:48,265 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-28 00:55:48,265 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-28 00:55:48,267 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-28 00:55:48,268 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-28 00:55:48,268 INFO L153 SettingsManager]: * Use SBE=true [2024-06-28 00:55:48,268 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-28 00:55:48,268 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-28 00:55:48,268 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-28 00:55:48,269 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-28 00:55:48,270 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-28 00:55:48,270 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-28 00:55:48,270 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-28 00:55:48,270 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-28 00:55:48,270 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-28 00:55:48,271 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-28 00:55:48,271 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-28 00:55:48,271 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-28 00:55:48,271 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-28 00:55:48,272 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-28 00:55:48,272 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-28 00:55:48,273 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-28 00:55:48,273 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-28 00:55:48,273 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-28 00:55:48,273 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-28 00:55:48,273 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-28 00:55:48,274 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-28 00:55:48,274 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-28 00:55:48,274 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-28 00:55:48,274 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-28 00:55:48,274 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-28 00:55:48,274 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-28 00:55:48,275 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-28 00:55:48,275 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-28 00:55:48,275 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false [2024-06-28 00:55:48,471 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-28 00:55:48,493 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-28 00:55:48,495 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-28 00:55:48,496 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-28 00:55:48,496 INFO L274 PluginConnector]: CDTParser initialized [2024-06-28 00:55:48,497 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/safe014_pso.oepc_pso.opt_tso.oepc_tso.opt.i [2024-06-28 00:55:49,560 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-28 00:55:49,792 INFO L384 CDTParser]: Found 1 translation units. [2024-06-28 00:55:49,798 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/safe014_pso.oepc_pso.opt_tso.oepc_tso.opt.i [2024-06-28 00:55:49,813 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/57a75bf17/d06db4a35c8a4af8ad3fd74798e9c10e/FLAGa7e11ce97 [2024-06-28 00:55:49,827 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/57a75bf17/d06db4a35c8a4af8ad3fd74798e9c10e [2024-06-28 00:55:49,829 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-06-28 00:55:49,829 INFO L274 PluginConnector]: Witness Parser initialized [2024-06-28 00:55:49,830 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-06-19_11-23-25.files/mutex-meet-nonrel/safe014_pso.oepc_pso.opt_tso.oepc_tso.opt.yml/witness.yml [2024-06-28 00:55:49,937 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-28 00:55:49,938 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-06-28 00:55:49,938 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-28 00:55:49,939 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-28 00:55:49,942 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-28 00:55:49,943 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.06 12:55:49" (1/2) ... [2024-06-28 00:55:49,944 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@554bd4df and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.06 12:55:49, skipping insertion in model container [2024-06-28 00:55:49,944 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.06 12:55:49" (1/2) ... [2024-06-28 00:55:49,945 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@75e05347 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.06 12:55:49, skipping insertion in model container [2024-06-28 00:55:49,946 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 28.06 12:55:49" (2/2) ... [2024-06-28 00:55:49,946 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@554bd4df and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 28.06 12:55:49, skipping insertion in model container [2024-06-28 00:55:49,946 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 28.06 12:55:49" (2/2) ... [2024-06-28 00:55:49,946 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-06-28 00:55:49,998 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-06-28 00:55:49,999 INFO L97 edCorrectnessWitness]: Location invariant before [L783-L783] ((((((! multithreaded || 0 <= __unbuffered_cnt) && (! multithreaded || ((__unbuffered_p0_EBX == 0 || __unbuffered_p0_EBX == 1) || __unbuffered_p0_EBX == 2))) && (! multithreaded || (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1))) && (! multithreaded || ((__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1) || __unbuffered_p2_EAX == 2))) && (! multithreaded || (y == 0 || y == 1))) && (! multithreaded || (((((0 <= __unbuffered_cnt && (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1)) && (y == 0 || y == 1)) && ((__unbuffered_p0_EBX == 0 || __unbuffered_p0_EBX == 1) || __unbuffered_p0_EBX == 2)) && ((__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1) || __unbuffered_p2_EAX == 2)) && ((x == 0 || x == 1) || x == 2)))) && (! multithreaded || ((x == 0 || x == 1) || x == 2)) [2024-06-28 00:55:49,999 INFO L97 edCorrectnessWitness]: Location invariant before [L781-L781] ((((((! multithreaded || 0 <= __unbuffered_cnt) && (! multithreaded || ((__unbuffered_p0_EBX == 0 || __unbuffered_p0_EBX == 1) || __unbuffered_p0_EBX == 2))) && (! multithreaded || (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1))) && (! multithreaded || ((__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1) || __unbuffered_p2_EAX == 2))) && (! multithreaded || (y == 0 || y == 1))) && (! multithreaded || (((((0 <= __unbuffered_cnt && (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1)) && (y == 0 || y == 1)) && ((__unbuffered_p0_EBX == 0 || __unbuffered_p0_EBX == 1) || __unbuffered_p0_EBX == 2)) && ((__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1) || __unbuffered_p2_EAX == 2)) && ((x == 0 || x == 1) || x == 2)))) && (! multithreaded || ((x == 0 || x == 1) || x == 2)) [2024-06-28 00:55:50,000 INFO L97 edCorrectnessWitness]: Location invariant before [L784-L784] ((((((! multithreaded || 0 <= __unbuffered_cnt) && (! multithreaded || ((__unbuffered_p0_EBX == 0 || __unbuffered_p0_EBX == 1) || __unbuffered_p0_EBX == 2))) && (! multithreaded || (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1))) && (! multithreaded || ((__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1) || __unbuffered_p2_EAX == 2))) && (! multithreaded || (y == 0 || y == 1))) && (! multithreaded || (((((0 <= __unbuffered_cnt && (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1)) && (y == 0 || y == 1)) && ((__unbuffered_p0_EBX == 0 || __unbuffered_p0_EBX == 1) || __unbuffered_p0_EBX == 2)) && ((__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1) || __unbuffered_p2_EAX == 2)) && ((x == 0 || x == 1) || x == 2)))) && (! multithreaded || ((x == 0 || x == 1) || x == 2)) [2024-06-28 00:55:50,000 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-06-28 00:55:50,000 INFO L106 edCorrectnessWitness]: ghost_update [L779-L779] multithreaded = 1; [2024-06-28 00:55:50,036 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-28 00:55:50,197 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/safe014_pso.oepc_pso.opt_tso.oepc_tso.opt.i[975,988] [2024-06-28 00:55:50,298 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-28 00:55:50,304 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local [2024-06-28 00:55:50,335 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/safe014_pso.oepc_pso.opt_tso.oepc_tso.opt.i[975,988] Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-06-28 00:55:50,415 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-28 00:55:50,441 INFO L206 MainTranslator]: Completed translation [2024-06-28 00:55:50,441 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 28.06 12:55:50 WrapperNode [2024-06-28 00:55:50,441 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-28 00:55:50,442 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-28 00:55:50,442 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-28 00:55:50,442 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-28 00:55:50,447 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 28.06 12:55:50" (1/1) ... [2024-06-28 00:55:50,458 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 28.06 12:55:50" (1/1) ... [2024-06-28 00:55:50,480 INFO L138 Inliner]: procedures = 175, calls = 41, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 64 [2024-06-28 00:55:50,480 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-28 00:55:50,481 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-28 00:55:50,481 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-28 00:55:50,481 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-28 00:55:50,489 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 28.06 12:55:50" (1/1) ... [2024-06-28 00:55:50,489 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 28.06 12:55:50" (1/1) ... [2024-06-28 00:55:50,491 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 28.06 12:55:50" (1/1) ... [2024-06-28 00:55:50,505 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]. [2024-06-28 00:55:50,505 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 28.06 12:55:50" (1/1) ... [2024-06-28 00:55:50,505 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 28.06 12:55:50" (1/1) ... [2024-06-28 00:55:50,509 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 28.06 12:55:50" (1/1) ... [2024-06-28 00:55:50,510 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 28.06 12:55:50" (1/1) ... [2024-06-28 00:55:50,511 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 28.06 12:55:50" (1/1) ... [2024-06-28 00:55:50,512 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 28.06 12:55:50" (1/1) ... [2024-06-28 00:55:50,514 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-28 00:55:50,514 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-28 00:55:50,515 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-28 00:55:50,515 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-28 00:55:50,515 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 28.06 12:55:50" (1/1) ... [2024-06-28 00:55:50,527 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-28 00:55:50,533 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-28 00:55:50,544 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) [2024-06-28 00:55:50,545 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 [2024-06-28 00:55:50,579 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-06-28 00:55:50,579 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-28 00:55:50,579 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2024-06-28 00:55:50,580 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2024-06-28 00:55:50,580 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2024-06-28 00:55:50,580 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2024-06-28 00:55:50,580 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2024-06-28 00:55:50,580 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2024-06-28 00:55:50,580 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-28 00:55:50,581 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-06-28 00:55:50,581 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-28 00:55:50,581 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-28 00:55:50,583 WARN L214 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2024-06-28 00:55:50,667 INFO L244 CfgBuilder]: Building ICFG [2024-06-28 00:55:50,669 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-28 00:55:50,800 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-28 00:55:50,800 INFO L293 CfgBuilder]: Performing block encoding [2024-06-28 00:55:50,850 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-28 00:55:50,851 INFO L320 CfgBuilder]: Removed 0 assume(true) statements. [2024-06-28 00:55:50,851 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.06 12:55:50 BoogieIcfgContainer [2024-06-28 00:55:50,851 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-28 00:55:50,853 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-28 00:55:50,853 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-28 00:55:50,855 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-28 00:55:50,855 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.06 12:55:49" (1/4) ... [2024-06-28 00:55:50,856 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6d55dcc0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.06 12:55:50, skipping insertion in model container [2024-06-28 00:55:50,856 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 28.06 12:55:49" (2/4) ... [2024-06-28 00:55:50,856 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6d55dcc0 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 28.06 12:55:50, skipping insertion in model container [2024-06-28 00:55:50,856 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 28.06 12:55:50" (3/4) ... [2024-06-28 00:55:50,857 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6d55dcc0 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 28.06 12:55:50, skipping insertion in model container [2024-06-28 00:55:50,857 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.06 12:55:50" (4/4) ... [2024-06-28 00:55:50,858 INFO L112 eAbstractionObserver]: Analyzing ICFG safe014_pso.oepc_pso.opt_tso.oepc_tso.opt.i [2024-06-28 00:55:50,873 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-28 00:55:50,873 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 4 error locations. [2024-06-28 00:55:50,873 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-28 00:55:50,917 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-06-28 00:55:50,946 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 54 places, 45 transitions, 102 flow [2024-06-28 00:55:50,977 INFO L124 PetriNetUnfolderBase]: 1/42 cut-off events. [2024-06-28 00:55:50,978 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-28 00:55:50,981 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52 conditions, 42 events. 1/42 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 66 event pairs, 0 based on Foata normal form. 0/37 useless extension candidates. Maximal degree in co-relation 43. Up to 2 conditions per place. [2024-06-28 00:55:50,981 INFO L82 GeneralOperation]: Start removeDead. Operand has 54 places, 45 transitions, 102 flow [2024-06-28 00:55:50,984 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 49 places, 39 transitions, 87 flow [2024-06-28 00:55:50,994 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-28 00:55:51,001 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;@16ac9390, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-28 00:55:51,001 INFO L358 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2024-06-28 00:55:51,007 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-28 00:55:51,007 INFO L124 PetriNetUnfolderBase]: 0/5 cut-off events. [2024-06-28 00:55:51,008 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-28 00:55:51,008 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:55:51,009 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2024-06-28 00:55:51,009 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 00:55:51,014 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:55:51,014 INFO L85 PathProgramCache]: Analyzing trace with hash 210327718, now seen corresponding path program 1 times [2024-06-28 00:55:51,022 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:55:51,023 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1586466915] [2024-06-28 00:55:51,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:55:51,024 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:55:51,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:55:51,377 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:55:51,377 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:55:51,378 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1586466915] [2024-06-28 00:55:51,379 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1586466915] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:55:51,379 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:55:51,379 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-06-28 00:55:51,381 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [690439297] [2024-06-28 00:55:51,381 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:55:51,387 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-28 00:55:51,392 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:55:51,409 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-28 00:55:51,410 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-28 00:55:51,450 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 45 [2024-06-28 00:55:51,453 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 39 transitions, 87 flow. Second operand has 3 states, 3 states have (on average 21.333333333333332) internal successors, (64), 3 states have internal predecessors, (64), 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) [2024-06-28 00:55:51,454 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:55:51,454 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 45 [2024-06-28 00:55:51,455 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:55:51,649 INFO L124 PetriNetUnfolderBase]: 696/1162 cut-off events. [2024-06-28 00:55:51,649 INFO L125 PetriNetUnfolderBase]: For 17/17 co-relation queries the response was YES. [2024-06-28 00:55:51,655 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2271 conditions, 1162 events. 696/1162 cut-off events. For 17/17 co-relation queries the response was YES. Maximal size of possible extension queue 93. Compared 6677 event pairs, 457 based on Foata normal form. 1/1114 useless extension candidates. Maximal degree in co-relation 2259. Up to 1056 conditions per place. [2024-06-28 00:55:51,662 INFO L140 encePairwiseOnDemand]: 38/45 looper letters, 31 selfloop transitions, 4 changer transitions 0/51 dead transitions. [2024-06-28 00:55:51,663 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 51 places, 51 transitions, 187 flow [2024-06-28 00:55:51,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-28 00:55:51,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-28 00:55:51,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 98 transitions. [2024-06-28 00:55:51,673 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.725925925925926 [2024-06-28 00:55:51,675 INFO L175 Difference]: Start difference. First operand has 49 places, 39 transitions, 87 flow. Second operand 3 states and 98 transitions. [2024-06-28 00:55:51,675 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 51 places, 51 transitions, 187 flow [2024-06-28 00:55:51,677 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 51 transitions, 182 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-06-28 00:55:51,682 INFO L231 Difference]: Finished difference. Result has 49 places, 42 transitions, 114 flow [2024-06-28 00:55:51,683 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=84, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=114, PETRI_PLACES=49, PETRI_TRANSITIONS=42} [2024-06-28 00:55:51,686 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 0 predicate places. [2024-06-28 00:55:51,687 INFO L495 AbstractCegarLoop]: Abstraction has has 49 places, 42 transitions, 114 flow [2024-06-28 00:55:51,687 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.333333333333332) internal successors, (64), 3 states have internal predecessors, (64), 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) [2024-06-28 00:55:51,687 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:55:51,687 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:55:51,687 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-28 00:55:51,688 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 00:55:51,689 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:55:51,689 INFO L85 PathProgramCache]: Analyzing trace with hash -1914513620, now seen corresponding path program 1 times [2024-06-28 00:55:51,689 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:55:51,689 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [910753939] [2024-06-28 00:55:51,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:55:51,690 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:55:51,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:55:51,878 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:55:51,879 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:55:51,879 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [910753939] [2024-06-28 00:55:51,880 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [910753939] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:55:51,880 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:55:51,880 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-28 00:55:51,880 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [386723410] [2024-06-28 00:55:51,880 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:55:51,881 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-28 00:55:51,881 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:55:51,881 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-28 00:55:51,882 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-28 00:55:51,937 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 45 [2024-06-28 00:55:51,938 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 42 transitions, 114 flow. Second operand has 6 states, 6 states have (on average 19.166666666666668) internal successors, (115), 6 states have internal predecessors, (115), 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) [2024-06-28 00:55:51,938 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:55:51,938 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 45 [2024-06-28 00:55:51,938 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:55:52,158 INFO L124 PetriNetUnfolderBase]: 1225/1978 cut-off events. [2024-06-28 00:55:52,158 INFO L125 PetriNetUnfolderBase]: For 324/338 co-relation queries the response was YES. [2024-06-28 00:55:52,162 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4385 conditions, 1978 events. 1225/1978 cut-off events. For 324/338 co-relation queries the response was YES. Maximal size of possible extension queue 120. Compared 10894 event pairs, 343 based on Foata normal form. 13/1939 useless extension candidates. Maximal degree in co-relation 4373. Up to 1745 conditions per place. [2024-06-28 00:55:52,171 INFO L140 encePairwiseOnDemand]: 38/45 looper letters, 41 selfloop transitions, 6 changer transitions 0/61 dead transitions. [2024-06-28 00:55:52,171 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 51 places, 61 transitions, 254 flow [2024-06-28 00:55:52,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-28 00:55:52,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-28 00:55:52,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 122 transitions. [2024-06-28 00:55:52,176 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6777777777777778 [2024-06-28 00:55:52,176 INFO L175 Difference]: Start difference. First operand has 49 places, 42 transitions, 114 flow. Second operand 4 states and 122 transitions. [2024-06-28 00:55:52,176 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 51 places, 61 transitions, 254 flow [2024-06-28 00:55:52,178 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 61 transitions, 250 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-28 00:55:52,179 INFO L231 Difference]: Finished difference. Result has 51 places, 43 transitions, 137 flow [2024-06-28 00:55:52,179 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=106, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=137, PETRI_PLACES=51, PETRI_TRANSITIONS=43} [2024-06-28 00:55:52,180 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 2 predicate places. [2024-06-28 00:55:52,180 INFO L495 AbstractCegarLoop]: Abstraction has has 51 places, 43 transitions, 137 flow [2024-06-28 00:55:52,180 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 19.166666666666668) internal successors, (115), 6 states have internal predecessors, (115), 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) [2024-06-28 00:55:52,181 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:55:52,182 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:55:52,183 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-06-28 00:55:52,183 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 00:55:52,185 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:55:52,185 INFO L85 PathProgramCache]: Analyzing trace with hash -1265517149, now seen corresponding path program 1 times [2024-06-28 00:55:52,185 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:55:52,185 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2065591800] [2024-06-28 00:55:52,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:55:52,185 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:55:52,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:55:52,314 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:55:52,315 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:55:52,315 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2065591800] [2024-06-28 00:55:52,315 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2065591800] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:55:52,315 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:55:52,315 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-28 00:55:52,315 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [159488264] [2024-06-28 00:55:52,316 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:55:52,316 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-28 00:55:52,317 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:55:52,317 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-28 00:55:52,317 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-06-28 00:55:52,344 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 45 [2024-06-28 00:55:52,345 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 43 transitions, 137 flow. Second operand has 4 states, 4 states have (on average 20.0) internal successors, (80), 4 states have internal predecessors, (80), 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) [2024-06-28 00:55:52,345 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:55:52,345 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 45 [2024-06-28 00:55:52,345 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:55:52,506 INFO L124 PetriNetUnfolderBase]: 1175/1892 cut-off events. [2024-06-28 00:55:52,506 INFO L125 PetriNetUnfolderBase]: For 773/773 co-relation queries the response was YES. [2024-06-28 00:55:52,510 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4504 conditions, 1892 events. 1175/1892 cut-off events. For 773/773 co-relation queries the response was YES. Maximal size of possible extension queue 116. Compared 10394 event pairs, 406 based on Foata normal form. 2/1887 useless extension candidates. Maximal degree in co-relation 4490. Up to 1716 conditions per place. [2024-06-28 00:55:52,519 INFO L140 encePairwiseOnDemand]: 37/45 looper letters, 45 selfloop transitions, 8 changer transitions 0/67 dead transitions. [2024-06-28 00:55:52,520 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 67 transitions, 309 flow [2024-06-28 00:55:52,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-28 00:55:52,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-28 00:55:52,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 122 transitions. [2024-06-28 00:55:52,523 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6777777777777778 [2024-06-28 00:55:52,524 INFO L175 Difference]: Start difference. First operand has 51 places, 43 transitions, 137 flow. Second operand 4 states and 122 transitions. [2024-06-28 00:55:52,524 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 67 transitions, 309 flow [2024-06-28 00:55:52,526 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 67 transitions, 294 flow, removed 2 selfloop flow, removed 2 redundant places. [2024-06-28 00:55:52,527 INFO L231 Difference]: Finished difference. Result has 54 places, 50 transitions, 180 flow [2024-06-28 00:55:52,528 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=124, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=180, PETRI_PLACES=54, PETRI_TRANSITIONS=50} [2024-06-28 00:55:52,529 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 5 predicate places. [2024-06-28 00:55:52,529 INFO L495 AbstractCegarLoop]: Abstraction has has 54 places, 50 transitions, 180 flow [2024-06-28 00:55:52,529 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 20.0) internal successors, (80), 4 states have internal predecessors, (80), 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) [2024-06-28 00:55:52,529 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:55:52,529 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:55:52,529 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-06-28 00:55:52,530 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 00:55:52,530 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:55:52,530 INFO L85 PathProgramCache]: Analyzing trace with hash -550436143, now seen corresponding path program 1 times [2024-06-28 00:55:52,530 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:55:52,533 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1152662894] [2024-06-28 00:55:52,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:55:52,534 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:55:52,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:55:52,664 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:55:52,664 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:55:52,664 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1152662894] [2024-06-28 00:55:52,664 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1152662894] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:55:52,665 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:55:52,665 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-28 00:55:52,665 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [331214013] [2024-06-28 00:55:52,665 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:55:52,665 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-28 00:55:52,666 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:55:52,666 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-28 00:55:52,667 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-06-28 00:55:52,694 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 45 [2024-06-28 00:55:52,695 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 50 transitions, 180 flow. Second operand has 4 states, 4 states have (on average 20.25) internal successors, (81), 4 states have internal predecessors, (81), 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) [2024-06-28 00:55:52,695 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:55:52,695 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 45 [2024-06-28 00:55:52,695 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:55:52,870 INFO L124 PetriNetUnfolderBase]: 1170/1989 cut-off events. [2024-06-28 00:55:52,870 INFO L125 PetriNetUnfolderBase]: For 1360/1363 co-relation queries the response was YES. [2024-06-28 00:55:52,875 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5148 conditions, 1989 events. 1170/1989 cut-off events. For 1360/1363 co-relation queries the response was YES. Maximal size of possible extension queue 120. Compared 11503 event pairs, 631 based on Foata normal form. 4/1972 useless extension candidates. Maximal degree in co-relation 5132. Up to 1711 conditions per place. [2024-06-28 00:55:52,884 INFO L140 encePairwiseOnDemand]: 38/45 looper letters, 44 selfloop transitions, 9 changer transitions 0/67 dead transitions. [2024-06-28 00:55:52,884 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 67 transitions, 332 flow [2024-06-28 00:55:52,884 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-28 00:55:52,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-28 00:55:52,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 120 transitions. [2024-06-28 00:55:52,886 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6666666666666666 [2024-06-28 00:55:52,886 INFO L175 Difference]: Start difference. First operand has 54 places, 50 transitions, 180 flow. Second operand 4 states and 120 transitions. [2024-06-28 00:55:52,886 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 67 transitions, 332 flow [2024-06-28 00:55:52,889 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 67 transitions, 332 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-06-28 00:55:52,890 INFO L231 Difference]: Finished difference. Result has 58 places, 52 transitions, 216 flow [2024-06-28 00:55:52,890 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=180, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=216, PETRI_PLACES=58, PETRI_TRANSITIONS=52} [2024-06-28 00:55:52,891 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 9 predicate places. [2024-06-28 00:55:52,891 INFO L495 AbstractCegarLoop]: Abstraction has has 58 places, 52 transitions, 216 flow [2024-06-28 00:55:52,892 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 20.25) internal successors, (81), 4 states have internal predecessors, (81), 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) [2024-06-28 00:55:52,892 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:55:52,892 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:55:52,892 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-06-28 00:55:52,892 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 00:55:52,892 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:55:52,892 INFO L85 PathProgramCache]: Analyzing trace with hash 569170844, now seen corresponding path program 1 times [2024-06-28 00:55:52,892 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:55:52,892 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [178713563] [2024-06-28 00:55:52,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:55:52,893 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:55:52,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:55:53,060 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:55:53,061 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:55:53,061 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [178713563] [2024-06-28 00:55:53,061 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [178713563] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:55:53,061 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:55:53,061 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-28 00:55:53,061 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [361172022] [2024-06-28 00:55:53,061 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:55:53,061 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-28 00:55:53,062 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:55:53,062 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-28 00:55:53,062 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-28 00:55:53,098 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 45 [2024-06-28 00:55:53,098 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 52 transitions, 216 flow. Second operand has 6 states, 6 states have (on average 18.666666666666668) internal successors, (112), 6 states have internal predecessors, (112), 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) [2024-06-28 00:55:53,098 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:55:53,098 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 45 [2024-06-28 00:55:53,098 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:55:53,308 INFO L124 PetriNetUnfolderBase]: 1605/2578 cut-off events. [2024-06-28 00:55:53,308 INFO L125 PetriNetUnfolderBase]: For 2263/2263 co-relation queries the response was YES. [2024-06-28 00:55:53,314 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7041 conditions, 2578 events. 1605/2578 cut-off events. For 2263/2263 co-relation queries the response was YES. Maximal size of possible extension queue 151. Compared 14631 event pairs, 410 based on Foata normal form. 5/2574 useless extension candidates. Maximal degree in co-relation 7022. Up to 2141 conditions per place. [2024-06-28 00:55:53,325 INFO L140 encePairwiseOnDemand]: 35/45 looper letters, 56 selfloop transitions, 21 changer transitions 0/90 dead transitions. [2024-06-28 00:55:53,325 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 90 transitions, 498 flow [2024-06-28 00:55:53,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-28 00:55:53,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-28 00:55:53,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 153 transitions. [2024-06-28 00:55:53,326 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.68 [2024-06-28 00:55:53,327 INFO L175 Difference]: Start difference. First operand has 58 places, 52 transitions, 216 flow. Second operand 5 states and 153 transitions. [2024-06-28 00:55:53,329 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 90 transitions, 498 flow [2024-06-28 00:55:53,334 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 90 transitions, 490 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-28 00:55:53,336 INFO L231 Difference]: Finished difference. Result has 63 places, 62 transitions, 334 flow [2024-06-28 00:55:53,336 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=208, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=52, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=334, PETRI_PLACES=63, PETRI_TRANSITIONS=62} [2024-06-28 00:55:53,337 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 14 predicate places. [2024-06-28 00:55:53,341 INFO L495 AbstractCegarLoop]: Abstraction has has 63 places, 62 transitions, 334 flow [2024-06-28 00:55:53,341 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 18.666666666666668) internal successors, (112), 6 states have internal predecessors, (112), 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) [2024-06-28 00:55:53,342 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:55:53,342 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:55:53,342 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-06-28 00:55:53,342 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 00:55:53,342 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:55:53,342 INFO L85 PathProgramCache]: Analyzing trace with hash 569290814, now seen corresponding path program 2 times [2024-06-28 00:55:53,342 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:55:53,342 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [5999271] [2024-06-28 00:55:53,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:55:53,342 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:55:53,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:55:53,480 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:55:53,481 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:55:53,481 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [5999271] [2024-06-28 00:55:53,481 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [5999271] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:55:53,481 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:55:53,481 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-28 00:55:53,481 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [899296687] [2024-06-28 00:55:53,481 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:55:53,481 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-28 00:55:53,481 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:55:53,482 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-28 00:55:53,482 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-28 00:55:53,518 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 45 [2024-06-28 00:55:53,518 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 62 transitions, 334 flow. Second operand has 6 states, 6 states have (on average 18.666666666666668) internal successors, (112), 6 states have internal predecessors, (112), 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) [2024-06-28 00:55:53,518 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:55:53,518 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 45 [2024-06-28 00:55:53,518 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:55:53,731 INFO L124 PetriNetUnfolderBase]: 1600/2666 cut-off events. [2024-06-28 00:55:53,731 INFO L125 PetriNetUnfolderBase]: For 4791/4791 co-relation queries the response was YES. [2024-06-28 00:55:53,737 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8478 conditions, 2666 events. 1600/2666 cut-off events. For 4791/4791 co-relation queries the response was YES. Maximal size of possible extension queue 157. Compared 15561 event pairs, 576 based on Foata normal form. 2/2648 useless extension candidates. Maximal degree in co-relation 8456. Up to 2182 conditions per place. [2024-06-28 00:55:53,750 INFO L140 encePairwiseOnDemand]: 36/45 looper letters, 64 selfloop transitions, 22 changer transitions 0/99 dead transitions. [2024-06-28 00:55:53,750 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 99 transitions, 670 flow [2024-06-28 00:55:53,750 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-28 00:55:53,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-28 00:55:53,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 149 transitions. [2024-06-28 00:55:53,751 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6622222222222223 [2024-06-28 00:55:53,751 INFO L175 Difference]: Start difference. First operand has 63 places, 62 transitions, 334 flow. Second operand 5 states and 149 transitions. [2024-06-28 00:55:53,751 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 99 transitions, 670 flow [2024-06-28 00:55:53,759 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 99 transitions, 643 flow, removed 10 selfloop flow, removed 1 redundant places. [2024-06-28 00:55:53,760 INFO L231 Difference]: Finished difference. Result has 69 places, 74 transitions, 493 flow [2024-06-28 00:55:53,760 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=317, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=62, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=493, PETRI_PLACES=69, PETRI_TRANSITIONS=74} [2024-06-28 00:55:53,761 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 20 predicate places. [2024-06-28 00:55:53,761 INFO L495 AbstractCegarLoop]: Abstraction has has 69 places, 74 transitions, 493 flow [2024-06-28 00:55:53,761 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 18.666666666666668) internal successors, (112), 6 states have internal predecessors, (112), 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) [2024-06-28 00:55:53,761 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:55:53,761 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:55:53,761 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-06-28 00:55:53,761 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 00:55:53,761 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:55:53,761 INFO L85 PathProgramCache]: Analyzing trace with hash -688110128, now seen corresponding path program 1 times [2024-06-28 00:55:53,761 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:55:53,762 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [131630778] [2024-06-28 00:55:53,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:55:53,762 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:55:53,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:55:53,850 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:55:53,851 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:55:53,851 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [131630778] [2024-06-28 00:55:53,851 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [131630778] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:55:53,851 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:55:53,851 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-28 00:55:53,851 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1566793756] [2024-06-28 00:55:53,851 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:55:53,851 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-28 00:55:53,851 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:55:53,852 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-28 00:55:53,852 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-06-28 00:55:53,875 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 45 [2024-06-28 00:55:53,875 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 74 transitions, 493 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) [2024-06-28 00:55:53,876 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:55:53,876 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 45 [2024-06-28 00:55:53,876 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:55:54,067 INFO L124 PetriNetUnfolderBase]: 1246/2047 cut-off events. [2024-06-28 00:55:54,067 INFO L125 PetriNetUnfolderBase]: For 5239/5245 co-relation queries the response was YES. [2024-06-28 00:55:54,072 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7328 conditions, 2047 events. 1246/2047 cut-off events. For 5239/5245 co-relation queries the response was YES. Maximal size of possible extension queue 124. Compared 11645 event pairs, 558 based on Foata normal form. 8/2037 useless extension candidates. Maximal degree in co-relation 7302. Up to 1789 conditions per place. [2024-06-28 00:55:54,081 INFO L140 encePairwiseOnDemand]: 38/45 looper letters, 73 selfloop transitions, 11 changer transitions 0/98 dead transitions. [2024-06-28 00:55:54,081 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 98 transitions, 731 flow [2024-06-28 00:55:54,081 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-28 00:55:54,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-28 00:55:54,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 147 transitions. [2024-06-28 00:55:54,082 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6533333333333333 [2024-06-28 00:55:54,082 INFO L175 Difference]: Start difference. First operand has 69 places, 74 transitions, 493 flow. Second operand 5 states and 147 transitions. [2024-06-28 00:55:54,082 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 98 transitions, 731 flow [2024-06-28 00:55:54,088 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 98 transitions, 711 flow, removed 10 selfloop flow, removed 0 redundant places. [2024-06-28 00:55:54,090 INFO L231 Difference]: Finished difference. Result has 74 places, 76 transitions, 524 flow [2024-06-28 00:55:54,090 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=473, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=74, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=524, PETRI_PLACES=74, PETRI_TRANSITIONS=76} [2024-06-28 00:55:54,091 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 25 predicate places. [2024-06-28 00:55:54,091 INFO L495 AbstractCegarLoop]: Abstraction has has 74 places, 76 transitions, 524 flow [2024-06-28 00:55:54,092 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) [2024-06-28 00:55:54,092 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:55:54,092 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:55:54,092 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-06-28 00:55:54,092 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 00:55:54,093 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:55:54,093 INFO L85 PathProgramCache]: Analyzing trace with hash 788451806, now seen corresponding path program 1 times [2024-06-28 00:55:54,093 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:55:54,093 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1092245352] [2024-06-28 00:55:54,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:55:54,093 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:55:54,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:55:54,217 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:55:54,217 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:55:54,217 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1092245352] [2024-06-28 00:55:54,217 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1092245352] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:55:54,217 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:55:54,218 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-28 00:55:54,218 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [187982903] [2024-06-28 00:55:54,218 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:55:54,219 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-28 00:55:54,219 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:55:54,219 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-28 00:55:54,219 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-28 00:55:54,252 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 45 [2024-06-28 00:55:54,252 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 76 transitions, 524 flow. Second operand has 6 states, 6 states have (on average 18.833333333333332) internal successors, (113), 6 states have internal predecessors, (113), 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) [2024-06-28 00:55:54,252 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:55:54,252 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 45 [2024-06-28 00:55:54,252 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:55:54,468 INFO L124 PetriNetUnfolderBase]: 1570/2534 cut-off events. [2024-06-28 00:55:54,468 INFO L125 PetriNetUnfolderBase]: For 6431/6431 co-relation queries the response was YES. [2024-06-28 00:55:54,476 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9055 conditions, 2534 events. 1570/2534 cut-off events. For 6431/6431 co-relation queries the response was YES. Maximal size of possible extension queue 152. Compared 14397 event pairs, 448 based on Foata normal form. 5/2532 useless extension candidates. Maximal degree in co-relation 9026. Up to 2097 conditions per place. [2024-06-28 00:55:54,486 INFO L140 encePairwiseOnDemand]: 35/45 looper letters, 62 selfloop transitions, 27 changer transitions 0/102 dead transitions. [2024-06-28 00:55:54,487 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 102 transitions, 779 flow [2024-06-28 00:55:54,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-28 00:55:54,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-28 00:55:54,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 151 transitions. [2024-06-28 00:55:54,488 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6711111111111111 [2024-06-28 00:55:54,488 INFO L175 Difference]: Start difference. First operand has 74 places, 76 transitions, 524 flow. Second operand 5 states and 151 transitions. [2024-06-28 00:55:54,488 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 102 transitions, 779 flow [2024-06-28 00:55:54,496 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 102 transitions, 738 flow, removed 11 selfloop flow, removed 3 redundant places. [2024-06-28 00:55:54,497 INFO L231 Difference]: Finished difference. Result has 76 places, 76 transitions, 554 flow [2024-06-28 00:55:54,497 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=483, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=76, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=554, PETRI_PLACES=76, PETRI_TRANSITIONS=76} [2024-06-28 00:55:54,498 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 27 predicate places. [2024-06-28 00:55:54,498 INFO L495 AbstractCegarLoop]: Abstraction has has 76 places, 76 transitions, 554 flow [2024-06-28 00:55:54,498 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 18.833333333333332) internal successors, (113), 6 states have internal predecessors, (113), 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) [2024-06-28 00:55:54,498 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:55:54,499 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:55:54,499 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-06-28 00:55:54,499 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 00:55:54,499 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:55:54,499 INFO L85 PathProgramCache]: Analyzing trace with hash 468153032, now seen corresponding path program 2 times [2024-06-28 00:55:54,499 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:55:54,499 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1320826746] [2024-06-28 00:55:54,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:55:54,500 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:55:54,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:55:54,620 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:55:54,620 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:55:54,621 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1320826746] [2024-06-28 00:55:54,621 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1320826746] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:55:54,621 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:55:54,621 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-28 00:55:54,621 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1004589522] [2024-06-28 00:55:54,621 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:55:54,622 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-28 00:55:54,622 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:55:54,622 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-28 00:55:54,622 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-28 00:55:54,653 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 45 [2024-06-28 00:55:54,653 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 76 transitions, 554 flow. Second operand has 6 states, 6 states have (on average 18.833333333333332) internal successors, (113), 6 states have internal predecessors, (113), 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) [2024-06-28 00:55:54,653 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:55:54,654 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 45 [2024-06-28 00:55:54,654 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:55:54,860 INFO L124 PetriNetUnfolderBase]: 1587/2632 cut-off events. [2024-06-28 00:55:54,861 INFO L125 PetriNetUnfolderBase]: For 8479/8491 co-relation queries the response was YES. [2024-06-28 00:55:54,869 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9436 conditions, 2632 events. 1587/2632 cut-off events. For 8479/8491 co-relation queries the response was YES. Maximal size of possible extension queue 157. Compared 15457 event pairs, 684 based on Foata normal form. 10/2606 useless extension candidates. Maximal degree in co-relation 9406. Up to 2159 conditions per place. [2024-06-28 00:55:54,879 INFO L140 encePairwiseOnDemand]: 37/45 looper letters, 68 selfloop transitions, 24 changer transitions 0/105 dead transitions. [2024-06-28 00:55:54,879 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 80 places, 105 transitions, 864 flow [2024-06-28 00:55:54,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-28 00:55:54,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-28 00:55:54,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 149 transitions. [2024-06-28 00:55:54,880 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6622222222222223 [2024-06-28 00:55:54,880 INFO L175 Difference]: Start difference. First operand has 76 places, 76 transitions, 554 flow. Second operand 5 states and 149 transitions. [2024-06-28 00:55:54,880 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 80 places, 105 transitions, 864 flow [2024-06-28 00:55:54,887 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 105 transitions, 798 flow, removed 4 selfloop flow, removed 5 redundant places. [2024-06-28 00:55:54,889 INFO L231 Difference]: Finished difference. Result has 76 places, 80 transitions, 588 flow [2024-06-28 00:55:54,889 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=492, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=76, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=588, PETRI_PLACES=76, PETRI_TRANSITIONS=80} [2024-06-28 00:55:54,890 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 27 predicate places. [2024-06-28 00:55:54,890 INFO L495 AbstractCegarLoop]: Abstraction has has 76 places, 80 transitions, 588 flow [2024-06-28 00:55:54,890 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 18.833333333333332) internal successors, (113), 6 states have internal predecessors, (113), 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) [2024-06-28 00:55:54,890 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:55:54,890 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:55:54,890 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-06-28 00:55:54,891 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 00:55:54,891 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:55:54,891 INFO L85 PathProgramCache]: Analyzing trace with hash 1269823262, now seen corresponding path program 3 times [2024-06-28 00:55:54,891 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:55:54,891 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2133119647] [2024-06-28 00:55:54,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:55:54,891 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:55:54,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:55:55,032 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:55:55,032 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:55:55,032 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2133119647] [2024-06-28 00:55:55,032 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2133119647] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:55:55,032 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:55:55,032 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 00:55:55,032 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1178049241] [2024-06-28 00:55:55,032 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:55:55,033 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 00:55:55,034 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:55:55,035 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 00:55:55,035 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2024-06-28 00:55:55,073 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 45 [2024-06-28 00:55:55,073 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 80 transitions, 588 flow. Second operand has 7 states, 7 states have (on average 18.571428571428573) internal successors, (130), 7 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) [2024-06-28 00:55:55,073 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:55:55,074 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 45 [2024-06-28 00:55:55,074 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:55:55,303 INFO L124 PetriNetUnfolderBase]: 1582/2604 cut-off events. [2024-06-28 00:55:55,304 INFO L125 PetriNetUnfolderBase]: For 7839/7839 co-relation queries the response was YES. [2024-06-28 00:55:55,311 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9301 conditions, 2604 events. 1582/2604 cut-off events. For 7839/7839 co-relation queries the response was YES. Maximal size of possible extension queue 158. Compared 15135 event pairs, 677 based on Foata normal form. 2/2566 useless extension candidates. Maximal degree in co-relation 9271. Up to 2154 conditions per place. [2024-06-28 00:55:55,321 INFO L140 encePairwiseOnDemand]: 36/45 looper letters, 70 selfloop transitions, 26 changer transitions 0/109 dead transitions. [2024-06-28 00:55:55,322 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 81 places, 109 transitions, 848 flow [2024-06-28 00:55:55,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-28 00:55:55,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-28 00:55:55,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 173 transitions. [2024-06-28 00:55:55,323 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6407407407407407 [2024-06-28 00:55:55,323 INFO L175 Difference]: Start difference. First operand has 76 places, 80 transitions, 588 flow. Second operand 6 states and 173 transitions. [2024-06-28 00:55:55,323 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 81 places, 109 transitions, 848 flow [2024-06-28 00:55:55,333 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 109 transitions, 806 flow, removed 11 selfloop flow, removed 1 redundant places. [2024-06-28 00:55:55,334 INFO L231 Difference]: Finished difference. Result has 81 places, 80 transitions, 606 flow [2024-06-28 00:55:55,334 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=546, PETRI_DIFFERENCE_MINUEND_PLACES=75, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=80, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=606, PETRI_PLACES=81, PETRI_TRANSITIONS=80} [2024-06-28 00:55:55,335 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 32 predicate places. [2024-06-28 00:55:55,335 INFO L495 AbstractCegarLoop]: Abstraction has has 81 places, 80 transitions, 606 flow [2024-06-28 00:55:55,335 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.571428571428573) internal successors, (130), 7 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) [2024-06-28 00:55:55,335 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:55:55,335 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:55:55,336 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-06-28 00:55:55,336 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 00:55:55,336 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:55:55,336 INFO L85 PathProgramCache]: Analyzing trace with hash -337261788, now seen corresponding path program 1 times [2024-06-28 00:55:55,336 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:55:55,336 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [196081930] [2024-06-28 00:55:55,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:55:55,337 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:55:55,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:55:55,425 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:55:55,425 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:55:55,426 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [196081930] [2024-06-28 00:55:55,426 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [196081930] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:55:55,426 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:55:55,426 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-28 00:55:55,426 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1983950392] [2024-06-28 00:55:55,426 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:55:55,426 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-28 00:55:55,427 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:55:55,427 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-28 00:55:55,427 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-28 00:55:55,454 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 45 [2024-06-28 00:55:55,455 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 80 transitions, 606 flow. Second operand has 5 states, 5 states have (on average 20.4) internal successors, (102), 5 states have internal predecessors, (102), 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) [2024-06-28 00:55:55,455 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:55:55,455 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 45 [2024-06-28 00:55:55,455 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:55:55,638 INFO L124 PetriNetUnfolderBase]: 1484/2478 cut-off events. [2024-06-28 00:55:55,639 INFO L125 PetriNetUnfolderBase]: For 8015/8015 co-relation queries the response was YES. [2024-06-28 00:55:55,646 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8840 conditions, 2478 events. 1484/2478 cut-off events. For 8015/8015 co-relation queries the response was YES. Maximal size of possible extension queue 154. Compared 14597 event pairs, 665 based on Foata normal form. 1/2456 useless extension candidates. Maximal degree in co-relation 8808. Up to 2139 conditions per place. [2024-06-28 00:55:55,656 INFO L140 encePairwiseOnDemand]: 39/45 looper letters, 72 selfloop transitions, 8 changer transitions 0/100 dead transitions. [2024-06-28 00:55:55,656 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 84 places, 100 transitions, 847 flow [2024-06-28 00:55:55,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-28 00:55:55,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-28 00:55:55,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 116 transitions. [2024-06-28 00:55:55,657 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6444444444444445 [2024-06-28 00:55:55,657 INFO L175 Difference]: Start difference. First operand has 81 places, 80 transitions, 606 flow. Second operand 4 states and 116 transitions. [2024-06-28 00:55:55,657 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 84 places, 100 transitions, 847 flow [2024-06-28 00:55:55,667 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 100 transitions, 781 flow, removed 5 selfloop flow, removed 4 redundant places. [2024-06-28 00:55:55,668 INFO L231 Difference]: Finished difference. Result has 82 places, 87 transitions, 622 flow [2024-06-28 00:55:55,669 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=544, PETRI_DIFFERENCE_MINUEND_PLACES=77, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=80, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=622, PETRI_PLACES=82, PETRI_TRANSITIONS=87} [2024-06-28 00:55:55,669 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 33 predicate places. [2024-06-28 00:55:55,669 INFO L495 AbstractCegarLoop]: Abstraction has has 82 places, 87 transitions, 622 flow [2024-06-28 00:55:55,669 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 20.4) internal successors, (102), 5 states have internal predecessors, (102), 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) [2024-06-28 00:55:55,670 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:55:55,670 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:55:55,670 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-06-28 00:55:55,670 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 00:55:55,670 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:55:55,670 INFO L85 PathProgramCache]: Analyzing trace with hash -1347381325, now seen corresponding path program 1 times [2024-06-28 00:55:55,670 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:55:55,671 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1337290370] [2024-06-28 00:55:55,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:55:55,671 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:55:55,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:55:55,820 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:55:55,821 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:55:55,821 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1337290370] [2024-06-28 00:55:55,821 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1337290370] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:55:55,821 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:55:55,821 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 00:55:55,821 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1293472915] [2024-06-28 00:55:55,821 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:55:55,822 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 00:55:55,822 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:55:55,822 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 00:55:55,822 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-28 00:55:55,860 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 45 [2024-06-28 00:55:55,860 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 82 places, 87 transitions, 622 flow. Second operand has 7 states, 7 states have (on average 18.571428571428573) internal successors, (130), 7 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) [2024-06-28 00:55:55,860 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:55:55,860 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 45 [2024-06-28 00:55:55,861 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:55:56,170 INFO L124 PetriNetUnfolderBase]: 1950/3143 cut-off events. [2024-06-28 00:55:56,171 INFO L125 PetriNetUnfolderBase]: For 12142/12142 co-relation queries the response was YES. [2024-06-28 00:55:56,181 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11983 conditions, 3143 events. 1950/3143 cut-off events. For 12142/12142 co-relation queries the response was YES. Maximal size of possible extension queue 193. Compared 18665 event pairs, 218 based on Foata normal form. 6/3133 useless extension candidates. Maximal degree in co-relation 11949. Up to 2101 conditions per place. [2024-06-28 00:55:56,224 INFO L140 encePairwiseOnDemand]: 35/45 looper letters, 83 selfloop transitions, 37 changer transitions 0/133 dead transitions. [2024-06-28 00:55:56,225 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 87 places, 133 transitions, 1072 flow [2024-06-28 00:55:56,225 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-28 00:55:56,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-28 00:55:56,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 185 transitions. [2024-06-28 00:55:56,226 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6851851851851852 [2024-06-28 00:55:56,226 INFO L175 Difference]: Start difference. First operand has 82 places, 87 transitions, 622 flow. Second operand 6 states and 185 transitions. [2024-06-28 00:55:56,226 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 87 places, 133 transitions, 1072 flow [2024-06-28 00:55:56,241 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 87 places, 133 transitions, 1068 flow, removed 2 selfloop flow, removed 0 redundant places. [2024-06-28 00:55:56,243 INFO L231 Difference]: Finished difference. Result has 89 places, 95 transitions, 793 flow [2024-06-28 00:55:56,243 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=618, PETRI_DIFFERENCE_MINUEND_PLACES=82, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=87, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=793, PETRI_PLACES=89, PETRI_TRANSITIONS=95} [2024-06-28 00:55:56,243 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 40 predicate places. [2024-06-28 00:55:56,243 INFO L495 AbstractCegarLoop]: Abstraction has has 89 places, 95 transitions, 793 flow [2024-06-28 00:55:56,244 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.571428571428573) internal successors, (130), 7 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) [2024-06-28 00:55:56,244 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:55:56,244 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:55:56,244 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-06-28 00:55:56,244 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 00:55:56,244 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:55:56,245 INFO L85 PathProgramCache]: Analyzing trace with hash -1004784563, now seen corresponding path program 2 times [2024-06-28 00:55:56,245 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:55:56,245 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [349922174] [2024-06-28 00:55:56,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:55:56,245 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:55:56,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:55:56,367 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:55:56,367 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:55:56,367 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [349922174] [2024-06-28 00:55:56,367 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [349922174] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:55:56,367 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:55:56,368 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 00:55:56,368 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [240919093] [2024-06-28 00:55:56,368 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:55:56,368 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 00:55:56,368 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:55:56,369 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 00:55:56,369 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-28 00:55:56,407 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 45 [2024-06-28 00:55:56,408 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 89 places, 95 transitions, 793 flow. Second operand has 7 states, 7 states have (on average 18.571428571428573) internal successors, (130), 7 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) [2024-06-28 00:55:56,408 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:55:56,408 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 45 [2024-06-28 00:55:56,408 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:55:56,756 INFO L124 PetriNetUnfolderBase]: 1937/3108 cut-off events. [2024-06-28 00:55:56,756 INFO L125 PetriNetUnfolderBase]: For 15050/15050 co-relation queries the response was YES. [2024-06-28 00:55:56,766 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13040 conditions, 3108 events. 1937/3108 cut-off events. For 15050/15050 co-relation queries the response was YES. Maximal size of possible extension queue 191. Compared 18393 event pairs, 456 based on Foata normal form. 6/3105 useless extension candidates. Maximal degree in co-relation 13002. Up to 2612 conditions per place. [2024-06-28 00:55:56,778 INFO L140 encePairwiseOnDemand]: 35/45 looper letters, 83 selfloop transitions, 33 changer transitions 0/129 dead transitions. [2024-06-28 00:55:56,778 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 94 places, 129 transitions, 1145 flow [2024-06-28 00:55:56,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-28 00:55:56,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-28 00:55:56,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 178 transitions. [2024-06-28 00:55:56,779 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6592592592592592 [2024-06-28 00:55:56,780 INFO L175 Difference]: Start difference. First operand has 89 places, 95 transitions, 793 flow. Second operand 6 states and 178 transitions. [2024-06-28 00:55:56,780 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 94 places, 129 transitions, 1145 flow [2024-06-28 00:55:56,810 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 92 places, 129 transitions, 1087 flow, removed 13 selfloop flow, removed 2 redundant places. [2024-06-28 00:55:56,812 INFO L231 Difference]: Finished difference. Result has 93 places, 98 transitions, 850 flow [2024-06-28 00:55:56,812 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=737, PETRI_DIFFERENCE_MINUEND_PLACES=87, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=95, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=850, PETRI_PLACES=93, PETRI_TRANSITIONS=98} [2024-06-28 00:55:56,813 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 44 predicate places. [2024-06-28 00:55:56,813 INFO L495 AbstractCegarLoop]: Abstraction has has 93 places, 98 transitions, 850 flow [2024-06-28 00:55:56,813 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.571428571428573) internal successors, (130), 7 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) [2024-06-28 00:55:56,813 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:55:56,814 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:55:56,814 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-06-28 00:55:56,814 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 00:55:56,814 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:55:56,814 INFO L85 PathProgramCache]: Analyzing trace with hash 1627665597, now seen corresponding path program 3 times [2024-06-28 00:55:56,814 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:55:56,814 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [688864452] [2024-06-28 00:55:56,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:55:56,815 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:55:56,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:55:56,959 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:55:56,959 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:55:56,959 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [688864452] [2024-06-28 00:55:56,960 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [688864452] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:55:56,960 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:55:56,960 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 00:55:56,960 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1831905695] [2024-06-28 00:55:56,960 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:55:56,960 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 00:55:56,960 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:55:56,961 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 00:55:56,961 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-28 00:55:56,990 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 45 [2024-06-28 00:55:56,990 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 93 places, 98 transitions, 850 flow. Second operand has 7 states, 7 states have (on average 18.571428571428573) internal successors, (130), 7 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) [2024-06-28 00:55:56,990 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:55:56,990 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 45 [2024-06-28 00:55:56,991 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:55:57,271 INFO L124 PetriNetUnfolderBase]: 1929/3082 cut-off events. [2024-06-28 00:55:57,272 INFO L125 PetriNetUnfolderBase]: For 16992/16992 co-relation queries the response was YES. [2024-06-28 00:55:57,283 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13388 conditions, 3082 events. 1929/3082 cut-off events. For 16992/16992 co-relation queries the response was YES. Maximal size of possible extension queue 190. Compared 18187 event pairs, 471 based on Foata normal form. 4/3061 useless extension candidates. Maximal degree in co-relation 13348. Up to 2654 conditions per place. [2024-06-28 00:55:57,296 INFO L140 encePairwiseOnDemand]: 36/45 looper letters, 89 selfloop transitions, 29 changer transitions 0/131 dead transitions. [2024-06-28 00:55:57,296 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 98 places, 131 transitions, 1189 flow [2024-06-28 00:55:57,296 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-28 00:55:57,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-28 00:55:57,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 173 transitions. [2024-06-28 00:55:57,297 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6407407407407407 [2024-06-28 00:55:57,297 INFO L175 Difference]: Start difference. First operand has 93 places, 98 transitions, 850 flow. Second operand 6 states and 173 transitions. [2024-06-28 00:55:57,297 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 98 places, 131 transitions, 1189 flow [2024-06-28 00:55:57,323 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 94 places, 131 transitions, 1108 flow, removed 10 selfloop flow, removed 4 redundant places. [2024-06-28 00:55:57,324 INFO L231 Difference]: Finished difference. Result has 95 places, 100 transitions, 862 flow [2024-06-28 00:55:57,324 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=769, PETRI_DIFFERENCE_MINUEND_PLACES=89, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=98, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=862, PETRI_PLACES=95, PETRI_TRANSITIONS=100} [2024-06-28 00:55:57,325 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 46 predicate places. [2024-06-28 00:55:57,325 INFO L495 AbstractCegarLoop]: Abstraction has has 95 places, 100 transitions, 862 flow [2024-06-28 00:55:57,325 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.571428571428573) internal successors, (130), 7 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) [2024-06-28 00:55:57,325 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:55:57,325 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:55:57,326 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-06-28 00:55:57,326 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 00:55:57,326 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:55:57,326 INFO L85 PathProgramCache]: Analyzing trace with hash -1184372733, now seen corresponding path program 1 times [2024-06-28 00:55:57,326 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:55:57,326 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1413710928] [2024-06-28 00:55:57,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:55:57,327 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:55:57,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:55:57,413 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:55:57,413 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:55:57,413 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1413710928] [2024-06-28 00:55:57,413 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1413710928] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:55:57,414 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:55:57,414 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-28 00:55:57,414 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [849859377] [2024-06-28 00:55:57,414 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:55:57,414 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-28 00:55:57,414 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:55:57,415 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-28 00:55:57,415 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-28 00:55:57,435 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 45 [2024-06-28 00:55:57,436 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 95 places, 100 transitions, 862 flow. Second operand has 5 states, 5 states have (on average 20.4) internal successors, (102), 5 states have internal predecessors, (102), 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) [2024-06-28 00:55:57,436 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:55:57,436 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 45 [2024-06-28 00:55:57,436 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:55:57,712 INFO L124 PetriNetUnfolderBase]: 1783/2971 cut-off events. [2024-06-28 00:55:57,713 INFO L125 PetriNetUnfolderBase]: For 18737/18737 co-relation queries the response was YES. [2024-06-28 00:55:57,726 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13019 conditions, 2971 events. 1783/2971 cut-off events. For 18737/18737 co-relation queries the response was YES. Maximal size of possible extension queue 192. Compared 18331 event pairs, 443 based on Foata normal form. 2/2962 useless extension candidates. Maximal degree in co-relation 12978. Up to 2547 conditions per place. [2024-06-28 00:55:57,740 INFO L140 encePairwiseOnDemand]: 37/45 looper letters, 90 selfloop transitions, 25 changer transitions 0/131 dead transitions. [2024-06-28 00:55:57,740 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 99 places, 131 transitions, 1272 flow [2024-06-28 00:55:57,740 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-28 00:55:57,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-28 00:55:57,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 146 transitions. [2024-06-28 00:55:57,741 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6488888888888888 [2024-06-28 00:55:57,741 INFO L175 Difference]: Start difference. First operand has 95 places, 100 transitions, 862 flow. Second operand 5 states and 146 transitions. [2024-06-28 00:55:57,741 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 99 places, 131 transitions, 1272 flow [2024-06-28 00:55:57,776 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 95 places, 131 transitions, 1197 flow, removed 10 selfloop flow, removed 4 redundant places. [2024-06-28 00:55:57,778 INFO L231 Difference]: Finished difference. Result has 98 places, 112 transitions, 1004 flow [2024-06-28 00:55:57,778 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=787, PETRI_DIFFERENCE_MINUEND_PLACES=91, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=100, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=77, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1004, PETRI_PLACES=98, PETRI_TRANSITIONS=112} [2024-06-28 00:55:57,778 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 49 predicate places. [2024-06-28 00:55:57,778 INFO L495 AbstractCegarLoop]: Abstraction has has 98 places, 112 transitions, 1004 flow [2024-06-28 00:55:57,779 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 20.4) internal successors, (102), 5 states have internal predecessors, (102), 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) [2024-06-28 00:55:57,779 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:55:57,779 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:55:57,779 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-06-28 00:55:57,779 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 00:55:57,779 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:55:57,780 INFO L85 PathProgramCache]: Analyzing trace with hash 1699267775, now seen corresponding path program 1 times [2024-06-28 00:55:57,780 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:55:57,780 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1380469938] [2024-06-28 00:55:57,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:55:57,780 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:55:57,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:55:57,903 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:55:57,903 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:55:57,903 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1380469938] [2024-06-28 00:55:57,904 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1380469938] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:55:57,904 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:55:57,904 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 00:55:57,904 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1734112503] [2024-06-28 00:55:57,904 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:55:57,904 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 00:55:57,904 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:55:57,905 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 00:55:57,905 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-28 00:55:57,939 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 45 [2024-06-28 00:55:57,940 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 98 places, 112 transitions, 1004 flow. Second operand has 7 states, 7 states have (on average 18.714285714285715) internal successors, (131), 7 states have internal predecessors, (131), 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) [2024-06-28 00:55:57,940 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:55:57,940 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 45 [2024-06-28 00:55:57,940 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:55:58,263 INFO L124 PetriNetUnfolderBase]: 2036/3283 cut-off events. [2024-06-28 00:55:58,263 INFO L125 PetriNetUnfolderBase]: For 23462/23462 co-relation queries the response was YES. [2024-06-28 00:55:58,274 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14836 conditions, 3283 events. 2036/3283 cut-off events. For 23462/23462 co-relation queries the response was YES. Maximal size of possible extension queue 203. Compared 19708 event pairs, 231 based on Foata normal form. 18/3294 useless extension candidates. Maximal degree in co-relation 14792. Up to 2125 conditions per place. [2024-06-28 00:55:58,287 INFO L140 encePairwiseOnDemand]: 35/45 looper letters, 94 selfloop transitions, 46 changer transitions 0/153 dead transitions. [2024-06-28 00:55:58,287 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 103 places, 153 transitions, 1483 flow [2024-06-28 00:55:58,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-28 00:55:58,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-28 00:55:58,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 186 transitions. [2024-06-28 00:55:58,288 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6888888888888889 [2024-06-28 00:55:58,289 INFO L175 Difference]: Start difference. First operand has 98 places, 112 transitions, 1004 flow. Second operand 6 states and 186 transitions. [2024-06-28 00:55:58,289 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 103 places, 153 transitions, 1483 flow [2024-06-28 00:55:58,325 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 103 places, 153 transitions, 1447 flow, removed 18 selfloop flow, removed 0 redundant places. [2024-06-28 00:55:58,327 INFO L231 Difference]: Finished difference. Result has 104 places, 114 transitions, 1098 flow [2024-06-28 00:55:58,328 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=970, PETRI_DIFFERENCE_MINUEND_PLACES=98, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=112, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1098, PETRI_PLACES=104, PETRI_TRANSITIONS=114} [2024-06-28 00:55:58,328 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 55 predicate places. [2024-06-28 00:55:58,328 INFO L495 AbstractCegarLoop]: Abstraction has has 104 places, 114 transitions, 1098 flow [2024-06-28 00:55:58,328 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.714285714285715) internal successors, (131), 7 states have internal predecessors, (131), 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) [2024-06-28 00:55:58,328 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:55:58,328 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:55:58,329 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-06-28 00:55:58,329 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 00:55:58,329 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:55:58,329 INFO L85 PathProgramCache]: Analyzing trace with hash -1083401109, now seen corresponding path program 2 times [2024-06-28 00:55:58,329 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:55:58,329 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2021964668] [2024-06-28 00:55:58,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:55:58,330 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:55:58,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:55:58,454 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:55:58,454 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:55:58,454 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2021964668] [2024-06-28 00:55:58,455 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2021964668] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:55:58,455 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:55:58,455 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 00:55:58,455 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [582699756] [2024-06-28 00:55:58,455 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:55:58,455 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 00:55:58,456 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:55:58,456 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 00:55:58,456 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-28 00:55:58,499 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 45 [2024-06-28 00:55:58,500 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 104 places, 114 transitions, 1098 flow. Second operand has 7 states, 7 states have (on average 18.714285714285715) internal successors, (131), 7 states have internal predecessors, (131), 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) [2024-06-28 00:55:58,500 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:55:58,500 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 45 [2024-06-28 00:55:58,500 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:55:58,825 INFO L124 PetriNetUnfolderBase]: 1980/3199 cut-off events. [2024-06-28 00:55:58,826 INFO L125 PetriNetUnfolderBase]: For 24602/24602 co-relation queries the response was YES. [2024-06-28 00:55:58,835 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14636 conditions, 3199 events. 1980/3199 cut-off events. For 24602/24602 co-relation queries the response was YES. Maximal size of possible extension queue 197. Compared 19224 event pairs, 353 based on Foata normal form. 28/3218 useless extension candidates. Maximal degree in co-relation 14589. Up to 2421 conditions per place. [2024-06-28 00:55:58,847 INFO L140 encePairwiseOnDemand]: 35/45 looper letters, 96 selfloop transitions, 41 changer transitions 0/150 dead transitions. [2024-06-28 00:55:58,847 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 109 places, 150 transitions, 1498 flow [2024-06-28 00:55:58,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-28 00:55:58,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-28 00:55:58,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 182 transitions. [2024-06-28 00:55:58,848 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.674074074074074 [2024-06-28 00:55:58,849 INFO L175 Difference]: Start difference. First operand has 104 places, 114 transitions, 1098 flow. Second operand 6 states and 182 transitions. [2024-06-28 00:55:58,849 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 109 places, 150 transitions, 1498 flow [2024-06-28 00:55:58,888 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 106 places, 150 transitions, 1409 flow, removed 11 selfloop flow, removed 3 redundant places. [2024-06-28 00:55:58,890 INFO L231 Difference]: Finished difference. Result has 107 places, 115 transitions, 1125 flow [2024-06-28 00:55:58,890 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=1012, PETRI_DIFFERENCE_MINUEND_PLACES=101, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=114, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1125, PETRI_PLACES=107, PETRI_TRANSITIONS=115} [2024-06-28 00:55:58,890 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 58 predicate places. [2024-06-28 00:55:58,891 INFO L495 AbstractCegarLoop]: Abstraction has has 107 places, 115 transitions, 1125 flow [2024-06-28 00:55:58,891 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.714285714285715) internal successors, (131), 7 states have internal predecessors, (131), 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) [2024-06-28 00:55:58,891 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:55:58,891 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:55:58,891 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-06-28 00:55:58,891 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 00:55:58,891 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:55:58,892 INFO L85 PathProgramCache]: Analyzing trace with hash 1397287439, now seen corresponding path program 3 times [2024-06-28 00:55:58,892 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:55:58,892 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [620206582] [2024-06-28 00:55:58,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:55:58,892 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:55:58,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:55:58,996 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:55:58,997 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:55:58,997 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [620206582] [2024-06-28 00:55:58,997 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [620206582] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:55:58,997 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:55:58,997 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 00:55:58,997 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [543883476] [2024-06-28 00:55:58,997 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:55:58,998 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 00:55:58,998 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:55:58,998 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 00:55:58,998 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-28 00:55:59,056 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 45 [2024-06-28 00:55:59,056 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 107 places, 115 transitions, 1125 flow. Second operand has 7 states, 7 states have (on average 18.714285714285715) internal successors, (131), 7 states have internal predecessors, (131), 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) [2024-06-28 00:55:59,056 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:55:59,056 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 45 [2024-06-28 00:55:59,056 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:55:59,397 INFO L124 PetriNetUnfolderBase]: 2074/3444 cut-off events. [2024-06-28 00:55:59,397 INFO L125 PetriNetUnfolderBase]: For 27789/27801 co-relation queries the response was YES. [2024-06-28 00:55:59,407 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15356 conditions, 3444 events. 2074/3444 cut-off events. For 27789/27801 co-relation queries the response was YES. Maximal size of possible extension queue 209. Compared 21604 event pairs, 759 based on Foata normal form. 24/3425 useless extension candidates. Maximal degree in co-relation 15308. Up to 2785 conditions per place. [2024-06-28 00:55:59,418 INFO L140 encePairwiseOnDemand]: 37/45 looper letters, 112 selfloop transitions, 25 changer transitions 0/150 dead transitions. [2024-06-28 00:55:59,419 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 112 places, 150 transitions, 1512 flow [2024-06-28 00:55:59,420 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-28 00:55:59,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-28 00:55:59,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 175 transitions. [2024-06-28 00:55:59,421 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6481481481481481 [2024-06-28 00:55:59,421 INFO L175 Difference]: Start difference. First operand has 107 places, 115 transitions, 1125 flow. Second operand 6 states and 175 transitions. [2024-06-28 00:55:59,421 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 112 places, 150 transitions, 1512 flow [2024-06-28 00:55:59,459 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 108 places, 150 transitions, 1435 flow, removed 3 selfloop flow, removed 4 redundant places. [2024-06-28 00:55:59,462 INFO L231 Difference]: Finished difference. Result has 109 places, 116 transitions, 1123 flow [2024-06-28 00:55:59,462 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=1048, PETRI_DIFFERENCE_MINUEND_PLACES=103, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=115, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=90, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1123, PETRI_PLACES=109, PETRI_TRANSITIONS=116} [2024-06-28 00:55:59,463 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 60 predicate places. [2024-06-28 00:55:59,463 INFO L495 AbstractCegarLoop]: Abstraction has has 109 places, 116 transitions, 1123 flow [2024-06-28 00:55:59,463 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.714285714285715) internal successors, (131), 7 states have internal predecessors, (131), 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) [2024-06-28 00:55:59,463 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:55:59,463 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:55:59,464 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-06-28 00:55:59,464 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 00:55:59,464 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:55:59,464 INFO L85 PathProgramCache]: Analyzing trace with hash 529482653, now seen corresponding path program 4 times [2024-06-28 00:55:59,464 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:55:59,464 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1301146703] [2024-06-28 00:55:59,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:55:59,465 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:55:59,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:55:59,589 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:55:59,589 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:55:59,589 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1301146703] [2024-06-28 00:55:59,589 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1301146703] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:55:59,590 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:55:59,590 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 00:55:59,590 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1091694736] [2024-06-28 00:55:59,590 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:55:59,591 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 00:55:59,591 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:55:59,591 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 00:55:59,592 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2024-06-28 00:55:59,625 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 45 [2024-06-28 00:55:59,625 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 109 places, 116 transitions, 1123 flow. Second operand has 8 states, 8 states have (on average 18.5) internal successors, (148), 8 states have internal predecessors, (148), 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) [2024-06-28 00:55:59,625 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:55:59,626 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 45 [2024-06-28 00:55:59,626 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:56:00,033 INFO L124 PetriNetUnfolderBase]: 2168/3498 cut-off events. [2024-06-28 00:56:00,034 INFO L125 PetriNetUnfolderBase]: For 28879/28879 co-relation queries the response was YES. [2024-06-28 00:56:00,044 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15873 conditions, 3498 events. 2168/3498 cut-off events. For 28879/28879 co-relation queries the response was YES. Maximal size of possible extension queue 213. Compared 21366 event pairs, 486 based on Foata normal form. 16/3489 useless extension candidates. Maximal degree in co-relation 15824. Up to 2935 conditions per place. [2024-06-28 00:56:00,058 INFO L140 encePairwiseOnDemand]: 36/45 looper letters, 116 selfloop transitions, 28 changer transitions 0/157 dead transitions. [2024-06-28 00:56:00,058 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 115 places, 157 transitions, 1540 flow [2024-06-28 00:56:00,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 00:56:00,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 00:56:00,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 201 transitions. [2024-06-28 00:56:00,060 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.638095238095238 [2024-06-28 00:56:00,060 INFO L175 Difference]: Start difference. First operand has 109 places, 116 transitions, 1123 flow. Second operand 7 states and 201 transitions. [2024-06-28 00:56:00,060 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 115 places, 157 transitions, 1540 flow [2024-06-28 00:56:00,099 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 111 places, 157 transitions, 1483 flow, removed 5 selfloop flow, removed 4 redundant places. [2024-06-28 00:56:00,101 INFO L231 Difference]: Finished difference. Result has 112 places, 117 transitions, 1149 flow [2024-06-28 00:56:00,101 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=1066, PETRI_DIFFERENCE_MINUEND_PLACES=105, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=116, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=88, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1149, PETRI_PLACES=112, PETRI_TRANSITIONS=117} [2024-06-28 00:56:00,102 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 63 predicate places. [2024-06-28 00:56:00,102 INFO L495 AbstractCegarLoop]: Abstraction has has 112 places, 117 transitions, 1149 flow [2024-06-28 00:56:00,102 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.5) internal successors, (148), 8 states have internal predecessors, (148), 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) [2024-06-28 00:56:00,102 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:56:00,102 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:56:00,102 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-06-28 00:56:00,103 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 00:56:00,103 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:56:00,103 INFO L85 PathProgramCache]: Analyzing trace with hash 1391777189, now seen corresponding path program 5 times [2024-06-28 00:56:00,103 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:56:00,103 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [743361435] [2024-06-28 00:56:00,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:56:00,104 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:56:00,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:56:00,240 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:56:00,241 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:56:00,241 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [743361435] [2024-06-28 00:56:00,241 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [743361435] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:56:00,241 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:56:00,241 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 00:56:00,241 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [223734699] [2024-06-28 00:56:00,241 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:56:00,242 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 00:56:00,243 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:56:00,244 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 00:56:00,244 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-28 00:56:00,284 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 45 [2024-06-28 00:56:00,285 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 112 places, 117 transitions, 1149 flow. Second operand has 8 states, 8 states have (on average 18.5) internal successors, (148), 8 states have internal predecessors, (148), 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) [2024-06-28 00:56:00,285 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:56:00,285 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 45 [2024-06-28 00:56:00,285 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:56:00,692 INFO L124 PetriNetUnfolderBase]: 2200/3634 cut-off events. [2024-06-28 00:56:00,692 INFO L125 PetriNetUnfolderBase]: For 30574/30574 co-relation queries the response was YES. [2024-06-28 00:56:00,706 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16179 conditions, 3634 events. 2200/3634 cut-off events. For 30574/30574 co-relation queries the response was YES. Maximal size of possible extension queue 222. Compared 22787 event pairs, 779 based on Foata normal form. 12/3598 useless extension candidates. Maximal degree in co-relation 16129. Up to 2866 conditions per place. [2024-06-28 00:56:00,721 INFO L140 encePairwiseOnDemand]: 36/45 looper letters, 123 selfloop transitions, 31 changer transitions 0/167 dead transitions. [2024-06-28 00:56:00,721 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 119 places, 167 transitions, 1614 flow [2024-06-28 00:56:00,722 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 00:56:00,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 00:56:00,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 229 transitions. [2024-06-28 00:56:00,722 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6361111111111111 [2024-06-28 00:56:00,723 INFO L175 Difference]: Start difference. First operand has 112 places, 117 transitions, 1149 flow. Second operand 8 states and 229 transitions. [2024-06-28 00:56:00,723 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 119 places, 167 transitions, 1614 flow [2024-06-28 00:56:00,773 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 114 places, 167 transitions, 1549 flow, removed 6 selfloop flow, removed 5 redundant places. [2024-06-28 00:56:00,775 INFO L231 Difference]: Finished difference. Result has 115 places, 118 transitions, 1174 flow [2024-06-28 00:56:00,775 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=1084, PETRI_DIFFERENCE_MINUEND_PLACES=107, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=117, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=86, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1174, PETRI_PLACES=115, PETRI_TRANSITIONS=118} [2024-06-28 00:56:00,775 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 66 predicate places. [2024-06-28 00:56:00,775 INFO L495 AbstractCegarLoop]: Abstraction has has 115 places, 118 transitions, 1174 flow [2024-06-28 00:56:00,775 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.5) internal successors, (148), 8 states have internal predecessors, (148), 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) [2024-06-28 00:56:00,775 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:56:00,775 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:56:00,776 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-06-28 00:56:00,776 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 00:56:00,776 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:56:00,776 INFO L85 PathProgramCache]: Analyzing trace with hash 1393934765, now seen corresponding path program 1 times [2024-06-28 00:56:00,776 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:56:00,776 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [468324712] [2024-06-28 00:56:00,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:56:00,776 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:56:00,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:56:00,884 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:56:00,884 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:56:00,884 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [468324712] [2024-06-28 00:56:00,884 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [468324712] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:56:00,884 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:56:00,884 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 00:56:00,884 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [656899844] [2024-06-28 00:56:00,884 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:56:00,885 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 00:56:00,885 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:56:00,886 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 00:56:00,886 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-28 00:56:00,929 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 45 [2024-06-28 00:56:00,930 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 115 places, 118 transitions, 1174 flow. Second operand has 7 states, 7 states have (on average 18.714285714285715) internal successors, (131), 7 states have internal predecessors, (131), 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) [2024-06-28 00:56:00,930 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:56:00,930 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 45 [2024-06-28 00:56:00,930 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:56:01,272 INFO L124 PetriNetUnfolderBase]: 2180/3540 cut-off events. [2024-06-28 00:56:01,272 INFO L125 PetriNetUnfolderBase]: For 30741/30753 co-relation queries the response was YES. [2024-06-28 00:56:01,286 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15804 conditions, 3540 events. 2180/3540 cut-off events. For 30741/30753 co-relation queries the response was YES. Maximal size of possible extension queue 216. Compared 21809 event pairs, 403 based on Foata normal form. 20/3540 useless extension candidates. Maximal degree in co-relation 15753. Up to 2530 conditions per place. [2024-06-28 00:56:01,301 INFO L140 encePairwiseOnDemand]: 37/45 looper letters, 113 selfloop transitions, 29 changer transitions 0/155 dead transitions. [2024-06-28 00:56:01,301 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 119 places, 155 transitions, 1537 flow [2024-06-28 00:56:01,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-28 00:56:01,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-28 00:56:01,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 177 transitions. [2024-06-28 00:56:01,302 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6555555555555556 [2024-06-28 00:56:01,302 INFO L175 Difference]: Start difference. First operand has 115 places, 118 transitions, 1174 flow. Second operand 6 states and 177 transitions. [2024-06-28 00:56:01,302 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 119 places, 155 transitions, 1537 flow [2024-06-28 00:56:01,350 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 113 places, 155 transitions, 1461 flow, removed 8 selfloop flow, removed 6 redundant places. [2024-06-28 00:56:01,352 INFO L231 Difference]: Finished difference. Result has 114 places, 117 transitions, 1126 flow [2024-06-28 00:56:01,352 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=1064, PETRI_DIFFERENCE_MINUEND_PLACES=108, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=117, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=88, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1126, PETRI_PLACES=114, PETRI_TRANSITIONS=117} [2024-06-28 00:56:01,353 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 65 predicate places. [2024-06-28 00:56:01,353 INFO L495 AbstractCegarLoop]: Abstraction has has 114 places, 117 transitions, 1126 flow [2024-06-28 00:56:01,353 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.714285714285715) internal successors, (131), 7 states have internal predecessors, (131), 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) [2024-06-28 00:56:01,353 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:56:01,353 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:56:01,353 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-06-28 00:56:01,353 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 00:56:01,354 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:56:01,354 INFO L85 PathProgramCache]: Analyzing trace with hash 885543619, now seen corresponding path program 1 times [2024-06-28 00:56:01,354 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:56:01,354 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1158141636] [2024-06-28 00:56:01,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:56:01,354 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:56:01,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:56:01,443 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:56:01,444 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:56:01,444 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1158141636] [2024-06-28 00:56:01,444 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1158141636] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:56:01,444 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:56:01,444 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-28 00:56:01,444 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [430899645] [2024-06-28 00:56:01,444 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:56:01,445 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-28 00:56:01,445 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:56:01,445 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-28 00:56:01,445 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-28 00:56:01,475 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 45 [2024-06-28 00:56:01,476 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 114 places, 117 transitions, 1126 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) [2024-06-28 00:56:01,476 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:56:01,476 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 45 [2024-06-28 00:56:01,476 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:56:01,763 INFO L124 PetriNetUnfolderBase]: 2100/3436 cut-off events. [2024-06-28 00:56:01,763 INFO L125 PetriNetUnfolderBase]: For 28118/28118 co-relation queries the response was YES. [2024-06-28 00:56:01,777 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15173 conditions, 3436 events. 2100/3436 cut-off events. For 28118/28118 co-relation queries the response was YES. Maximal size of possible extension queue 215. Compared 21467 event pairs, 456 based on Foata normal form. 2/3417 useless extension candidates. Maximal degree in co-relation 15121. Up to 3018 conditions per place. [2024-06-28 00:56:01,790 INFO L140 encePairwiseOnDemand]: 38/45 looper letters, 91 selfloop transitions, 18 changer transitions 0/132 dead transitions. [2024-06-28 00:56:01,790 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 117 places, 132 transitions, 1392 flow [2024-06-28 00:56:01,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-28 00:56:01,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-28 00:56:01,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 117 transitions. [2024-06-28 00:56:01,792 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.65 [2024-06-28 00:56:01,793 INFO L175 Difference]: Start difference. First operand has 114 places, 117 transitions, 1126 flow. Second operand 4 states and 117 transitions. [2024-06-28 00:56:01,793 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 117 places, 132 transitions, 1392 flow [2024-06-28 00:56:01,873 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 114 places, 132 transitions, 1330 flow, removed 9 selfloop flow, removed 3 redundant places. [2024-06-28 00:56:01,875 INFO L231 Difference]: Finished difference. Result has 115 places, 120 transitions, 1137 flow [2024-06-28 00:56:01,875 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=1064, PETRI_DIFFERENCE_MINUEND_PLACES=111, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=117, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=99, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=1137, PETRI_PLACES=115, PETRI_TRANSITIONS=120} [2024-06-28 00:56:01,875 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 66 predicate places. [2024-06-28 00:56:01,876 INFO L495 AbstractCegarLoop]: Abstraction has has 115 places, 120 transitions, 1137 flow [2024-06-28 00:56:01,876 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) [2024-06-28 00:56:01,876 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:56:01,876 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:56:01,876 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-06-28 00:56:01,876 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 00:56:01,877 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:56:01,877 INFO L85 PathProgramCache]: Analyzing trace with hash 2139751777, now seen corresponding path program 2 times [2024-06-28 00:56:01,877 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:56:01,877 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [433696491] [2024-06-28 00:56:01,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:56:01,877 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:56:01,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:56:01,957 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:56:01,957 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:56:01,957 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [433696491] [2024-06-28 00:56:01,957 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [433696491] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:56:01,957 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:56:01,957 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-28 00:56:01,957 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1064786619] [2024-06-28 00:56:01,958 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:56:01,959 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-28 00:56:01,959 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:56:01,960 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-28 00:56:01,960 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-28 00:56:01,994 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 45 [2024-06-28 00:56:01,994 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 115 places, 120 transitions, 1137 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) [2024-06-28 00:56:01,994 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:56:01,994 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 45 [2024-06-28 00:56:01,994 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:56:02,261 INFO L124 PetriNetUnfolderBase]: 2092/3492 cut-off events. [2024-06-28 00:56:02,262 INFO L125 PetriNetUnfolderBase]: For 29020/29034 co-relation queries the response was YES. [2024-06-28 00:56:02,274 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15235 conditions, 3492 events. 2092/3492 cut-off events. For 29020/29034 co-relation queries the response was YES. Maximal size of possible extension queue 219. Compared 22180 event pairs, 799 based on Foata normal form. 16/3465 useless extension candidates. Maximal degree in co-relation 15182. Up to 3004 conditions per place. [2024-06-28 00:56:02,286 INFO L140 encePairwiseOnDemand]: 38/45 looper letters, 94 selfloop transitions, 21 changer transitions 0/138 dead transitions. [2024-06-28 00:56:02,286 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 119 places, 138 transitions, 1427 flow [2024-06-28 00:56:02,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-28 00:56:02,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-28 00:56:02,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 141 transitions. [2024-06-28 00:56:02,287 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6266666666666667 [2024-06-28 00:56:02,287 INFO L175 Difference]: Start difference. First operand has 115 places, 120 transitions, 1137 flow. Second operand 5 states and 141 transitions. [2024-06-28 00:56:02,287 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 119 places, 138 transitions, 1427 flow [2024-06-28 00:56:02,329 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 117 places, 138 transitions, 1380 flow, removed 10 selfloop flow, removed 2 redundant places. [2024-06-28 00:56:02,331 INFO L231 Difference]: Finished difference. Result has 118 places, 123 transitions, 1170 flow [2024-06-28 00:56:02,331 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=1094, PETRI_DIFFERENCE_MINUEND_PLACES=113, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=120, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=99, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1170, PETRI_PLACES=118, PETRI_TRANSITIONS=123} [2024-06-28 00:56:02,331 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 69 predicate places. [2024-06-28 00:56:02,331 INFO L495 AbstractCegarLoop]: Abstraction has has 118 places, 123 transitions, 1170 flow [2024-06-28 00:56:02,332 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) [2024-06-28 00:56:02,332 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:56:02,332 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:56:02,332 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-06-28 00:56:02,332 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 00:56:02,332 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:56:02,332 INFO L85 PathProgramCache]: Analyzing trace with hash 2131475913, now seen corresponding path program 1 times [2024-06-28 00:56:02,332 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:56:02,333 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [462944984] [2024-06-28 00:56:02,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:56:02,333 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:56:02,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:56:02,403 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:56:02,404 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:56:02,404 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [462944984] [2024-06-28 00:56:02,404 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [462944984] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:56:02,404 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:56:02,404 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-28 00:56:02,404 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [92207168] [2024-06-28 00:56:02,404 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:56:02,405 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-28 00:56:02,405 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:56:02,405 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-28 00:56:02,405 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-28 00:56:02,438 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 45 [2024-06-28 00:56:02,439 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 118 places, 123 transitions, 1170 flow. Second operand has 5 states, 5 states have (on average 20.6) internal successors, (103), 5 states have internal predecessors, (103), 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) [2024-06-28 00:56:02,439 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:56:02,439 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 45 [2024-06-28 00:56:02,439 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:56:02,726 INFO L124 PetriNetUnfolderBase]: 2071/3446 cut-off events. [2024-06-28 00:56:02,727 INFO L125 PetriNetUnfolderBase]: For 31153/31165 co-relation queries the response was YES. [2024-06-28 00:56:02,738 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15787 conditions, 3446 events. 2071/3446 cut-off events. For 31153/31165 co-relation queries the response was YES. Maximal size of possible extension queue 219. Compared 21820 event pairs, 465 based on Foata normal form. 10/3444 useless extension candidates. Maximal degree in co-relation 15733. Up to 3007 conditions per place. [2024-06-28 00:56:02,748 INFO L140 encePairwiseOnDemand]: 38/45 looper letters, 105 selfloop transitions, 25 changer transitions 0/146 dead transitions. [2024-06-28 00:56:02,748 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 122 places, 146 transitions, 1562 flow [2024-06-28 00:56:02,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-28 00:56:02,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-28 00:56:02,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 145 transitions. [2024-06-28 00:56:02,749 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6444444444444445 [2024-06-28 00:56:02,749 INFO L175 Difference]: Start difference. First operand has 118 places, 123 transitions, 1170 flow. Second operand 5 states and 145 transitions. [2024-06-28 00:56:02,750 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 122 places, 146 transitions, 1562 flow [2024-06-28 00:56:02,784 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 119 places, 146 transitions, 1508 flow, removed 8 selfloop flow, removed 3 redundant places. [2024-06-28 00:56:02,786 INFO L231 Difference]: Finished difference. Result has 120 places, 127 transitions, 1220 flow [2024-06-28 00:56:02,786 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=1116, PETRI_DIFFERENCE_MINUEND_PLACES=115, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=123, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=102, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1220, PETRI_PLACES=120, PETRI_TRANSITIONS=127} [2024-06-28 00:56:02,786 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 71 predicate places. [2024-06-28 00:56:02,786 INFO L495 AbstractCegarLoop]: Abstraction has has 120 places, 127 transitions, 1220 flow [2024-06-28 00:56:02,786 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 20.6) internal successors, (103), 5 states have internal predecessors, (103), 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) [2024-06-28 00:56:02,786 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:56:02,786 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:56:02,787 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-06-28 00:56:02,787 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 00:56:02,787 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:56:02,787 INFO L85 PathProgramCache]: Analyzing trace with hash 651956617, now seen corresponding path program 2 times [2024-06-28 00:56:02,787 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:56:02,787 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1443009340] [2024-06-28 00:56:02,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:56:02,787 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:56:02,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:56:02,869 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:56:02,870 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:56:02,870 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1443009340] [2024-06-28 00:56:02,870 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1443009340] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:56:02,870 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:56:02,870 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-28 00:56:02,870 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [435124143] [2024-06-28 00:56:02,870 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:56:02,870 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-28 00:56:02,870 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:56:02,871 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-28 00:56:02,871 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-06-28 00:56:02,898 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 45 [2024-06-28 00:56:02,898 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 120 places, 127 transitions, 1220 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) [2024-06-28 00:56:02,898 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:56:02,898 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 45 [2024-06-28 00:56:02,899 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:56:03,204 INFO L124 PetriNetUnfolderBase]: 2068/3462 cut-off events. [2024-06-28 00:56:03,204 INFO L125 PetriNetUnfolderBase]: For 32312/32312 co-relation queries the response was YES. [2024-06-28 00:56:03,217 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15858 conditions, 3462 events. 2068/3462 cut-off events. For 32312/32312 co-relation queries the response was YES. Maximal size of possible extension queue 221. Compared 22034 event pairs, 476 based on Foata normal form. 2/3453 useless extension candidates. Maximal degree in co-relation 15803. Up to 3002 conditions per place. [2024-06-28 00:56:03,227 INFO L140 encePairwiseOnDemand]: 37/45 looper letters, 103 selfloop transitions, 29 changer transitions 0/148 dead transitions. [2024-06-28 00:56:03,227 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 125 places, 148 transitions, 1532 flow [2024-06-28 00:56:03,228 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-28 00:56:03,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-28 00:56:03,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 168 transitions. [2024-06-28 00:56:03,228 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6222222222222222 [2024-06-28 00:56:03,228 INFO L175 Difference]: Start difference. First operand has 120 places, 127 transitions, 1220 flow. Second operand 6 states and 168 transitions. [2024-06-28 00:56:03,228 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 125 places, 148 transitions, 1532 flow [2024-06-28 00:56:03,276 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 124 places, 148 transitions, 1477 flow, removed 17 selfloop flow, removed 1 redundant places. [2024-06-28 00:56:03,277 INFO L231 Difference]: Finished difference. Result has 125 places, 127 transitions, 1229 flow [2024-06-28 00:56:03,278 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=1165, PETRI_DIFFERENCE_MINUEND_PLACES=119, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=127, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=98, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1229, PETRI_PLACES=125, PETRI_TRANSITIONS=127} [2024-06-28 00:56:03,278 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 76 predicate places. [2024-06-28 00:56:03,278 INFO L495 AbstractCegarLoop]: Abstraction has has 125 places, 127 transitions, 1229 flow [2024-06-28 00:56:03,278 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) [2024-06-28 00:56:03,278 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:56:03,278 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:56:03,278 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-06-28 00:56:03,278 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 00:56:03,279 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:56:03,279 INFO L85 PathProgramCache]: Analyzing trace with hash -1597947587, now seen corresponding path program 1 times [2024-06-28 00:56:03,279 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:56:03,279 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [401602848] [2024-06-28 00:56:03,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:56:03,279 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:56:03,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:56:03,375 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:56:03,375 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:56:03,376 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [401602848] [2024-06-28 00:56:03,376 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [401602848] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:56:03,376 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:56:03,376 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-28 00:56:03,376 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [215972024] [2024-06-28 00:56:03,376 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:56:03,377 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-28 00:56:03,377 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:56:03,377 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-28 00:56:03,377 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-28 00:56:03,399 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 45 [2024-06-28 00:56:03,399 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 125 places, 127 transitions, 1229 flow. Second operand has 6 states, 6 states have (on average 19.166666666666668) internal successors, (115), 6 states have internal predecessors, (115), 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) [2024-06-28 00:56:03,399 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:56:03,399 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 45 [2024-06-28 00:56:03,400 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:56:03,747 INFO L124 PetriNetUnfolderBase]: 2223/3601 cut-off events. [2024-06-28 00:56:03,747 INFO L125 PetriNetUnfolderBase]: For 33728/33728 co-relation queries the response was YES. [2024-06-28 00:56:03,763 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16462 conditions, 3601 events. 2223/3601 cut-off events. For 33728/33728 co-relation queries the response was YES. Maximal size of possible extension queue 222. Compared 22123 event pairs, 460 based on Foata normal form. 1/3593 useless extension candidates. Maximal degree in co-relation 16405. Up to 3200 conditions per place. [2024-06-28 00:56:03,777 INFO L140 encePairwiseOnDemand]: 36/45 looper letters, 136 selfloop transitions, 26 changer transitions 0/175 dead transitions. [2024-06-28 00:56:03,777 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 130 places, 175 transitions, 1990 flow [2024-06-28 00:56:03,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-28 00:56:03,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-28 00:56:03,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 167 transitions. [2024-06-28 00:56:03,778 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6185185185185185 [2024-06-28 00:56:03,778 INFO L175 Difference]: Start difference. First operand has 125 places, 127 transitions, 1229 flow. Second operand 6 states and 167 transitions. [2024-06-28 00:56:03,778 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 130 places, 175 transitions, 1990 flow [2024-06-28 00:56:03,832 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 126 places, 175 transitions, 1886 flow, removed 10 selfloop flow, removed 4 redundant places. [2024-06-28 00:56:03,834 INFO L231 Difference]: Finished difference. Result has 130 places, 146 transitions, 1475 flow [2024-06-28 00:56:03,834 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=1159, PETRI_DIFFERENCE_MINUEND_PLACES=121, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=127, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=107, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1475, PETRI_PLACES=130, PETRI_TRANSITIONS=146} [2024-06-28 00:56:03,835 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 81 predicate places. [2024-06-28 00:56:03,835 INFO L495 AbstractCegarLoop]: Abstraction has has 130 places, 146 transitions, 1475 flow [2024-06-28 00:56:03,835 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 19.166666666666668) internal successors, (115), 6 states have internal predecessors, (115), 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) [2024-06-28 00:56:03,835 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:56:03,835 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:56:03,835 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-06-28 00:56:03,835 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 00:56:03,835 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:56:03,835 INFO L85 PathProgramCache]: Analyzing trace with hash 2139520579, now seen corresponding path program 2 times [2024-06-28 00:56:03,836 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:56:03,836 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2111130096] [2024-06-28 00:56:03,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:56:03,836 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:56:03,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:56:03,926 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:56:03,926 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:56:03,926 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2111130096] [2024-06-28 00:56:03,926 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2111130096] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:56:03,926 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:56:03,927 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-28 00:56:03,927 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2048287008] [2024-06-28 00:56:03,927 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:56:03,927 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-28 00:56:03,928 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:56:03,928 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-28 00:56:03,928 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-28 00:56:03,946 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 45 [2024-06-28 00:56:03,947 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 130 places, 146 transitions, 1475 flow. Second operand has 6 states, 6 states have (on average 19.166666666666668) internal successors, (115), 6 states have internal predecessors, (115), 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) [2024-06-28 00:56:03,947 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:56:03,947 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 45 [2024-06-28 00:56:03,947 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:56:04,268 INFO L124 PetriNetUnfolderBase]: 2248/3663 cut-off events. [2024-06-28 00:56:04,269 INFO L125 PetriNetUnfolderBase]: For 37806/37806 co-relation queries the response was YES. [2024-06-28 00:56:04,282 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17359 conditions, 3663 events. 2248/3663 cut-off events. For 37806/37806 co-relation queries the response was YES. Maximal size of possible extension queue 225. Compared 22703 event pairs, 460 based on Foata normal form. 1/3660 useless extension candidates. Maximal degree in co-relation 17298. Up to 3267 conditions per place. [2024-06-28 00:56:04,293 INFO L140 encePairwiseOnDemand]: 36/45 looper letters, 146 selfloop transitions, 23 changer transitions 0/182 dead transitions. [2024-06-28 00:56:04,293 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 135 places, 182 transitions, 2075 flow [2024-06-28 00:56:04,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-28 00:56:04,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-28 00:56:04,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 171 transitions. [2024-06-28 00:56:04,294 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6333333333333333 [2024-06-28 00:56:04,294 INFO L175 Difference]: Start difference. First operand has 130 places, 146 transitions, 1475 flow. Second operand 6 states and 171 transitions. [2024-06-28 00:56:04,294 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 135 places, 182 transitions, 2075 flow [2024-06-28 00:56:04,356 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 135 places, 182 transitions, 2049 flow, removed 13 selfloop flow, removed 0 redundant places. [2024-06-28 00:56:04,358 INFO L231 Difference]: Finished difference. Result has 138 places, 154 transitions, 1620 flow [2024-06-28 00:56:04,358 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=1451, PETRI_DIFFERENCE_MINUEND_PLACES=130, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=146, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=126, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1620, PETRI_PLACES=138, PETRI_TRANSITIONS=154} [2024-06-28 00:56:04,359 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 89 predicate places. [2024-06-28 00:56:04,359 INFO L495 AbstractCegarLoop]: Abstraction has has 138 places, 154 transitions, 1620 flow [2024-06-28 00:56:04,359 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 19.166666666666668) internal successors, (115), 6 states have internal predecessors, (115), 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) [2024-06-28 00:56:04,359 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:56:04,359 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:56:04,359 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2024-06-28 00:56:04,359 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 00:56:04,359 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:56:04,359 INFO L85 PathProgramCache]: Analyzing trace with hash 2139527089, now seen corresponding path program 3 times [2024-06-28 00:56:04,359 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:56:04,360 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1669749263] [2024-06-28 00:56:04,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:56:04,360 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:56:04,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:56:04,436 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:56:04,437 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:56:04,437 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1669749263] [2024-06-28 00:56:04,437 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1669749263] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:56:04,437 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:56:04,437 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-28 00:56:04,437 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [461241239] [2024-06-28 00:56:04,437 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:56:04,438 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-28 00:56:04,438 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:56:04,438 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-28 00:56:04,438 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-28 00:56:04,454 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 45 [2024-06-28 00:56:04,454 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 138 places, 154 transitions, 1620 flow. Second operand has 6 states, 6 states have (on average 19.166666666666668) internal successors, (115), 6 states have internal predecessors, (115), 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) [2024-06-28 00:56:04,454 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:56:04,454 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 45 [2024-06-28 00:56:04,454 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:56:04,803 INFO L124 PetriNetUnfolderBase]: 2245/3625 cut-off events. [2024-06-28 00:56:04,803 INFO L125 PetriNetUnfolderBase]: For 39527/39527 co-relation queries the response was YES. [2024-06-28 00:56:04,819 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17479 conditions, 3625 events. 2245/3625 cut-off events. For 39527/39527 co-relation queries the response was YES. Maximal size of possible extension queue 223. Compared 22230 event pairs, 440 based on Foata normal form. 1/3624 useless extension candidates. Maximal degree in co-relation 17413. Up to 3265 conditions per place. [2024-06-28 00:56:04,831 INFO L140 encePairwiseOnDemand]: 36/45 looper letters, 146 selfloop transitions, 24 changer transitions 0/183 dead transitions. [2024-06-28 00:56:04,831 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 144 places, 183 transitions, 2103 flow [2024-06-28 00:56:04,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 00:56:04,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 00:56:04,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 188 transitions. [2024-06-28 00:56:04,832 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5968253968253968 [2024-06-28 00:56:04,832 INFO L175 Difference]: Start difference. First operand has 138 places, 154 transitions, 1620 flow. Second operand 7 states and 188 transitions. [2024-06-28 00:56:04,832 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 144 places, 183 transitions, 2103 flow [2024-06-28 00:56:04,900 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 141 places, 183 transitions, 2032 flow, removed 17 selfloop flow, removed 3 redundant places. [2024-06-28 00:56:04,903 INFO L231 Difference]: Finished difference. Result has 143 places, 157 transitions, 1644 flow [2024-06-28 00:56:04,903 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=1554, PETRI_DIFFERENCE_MINUEND_PLACES=135, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=154, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=132, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1644, PETRI_PLACES=143, PETRI_TRANSITIONS=157} [2024-06-28 00:56:04,903 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 94 predicate places. [2024-06-28 00:56:04,903 INFO L495 AbstractCegarLoop]: Abstraction has has 143 places, 157 transitions, 1644 flow [2024-06-28 00:56:04,903 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 19.166666666666668) internal successors, (115), 6 states have internal predecessors, (115), 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) [2024-06-28 00:56:04,904 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:56:04,904 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:56:04,904 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2024-06-28 00:56:04,904 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 00:56:04,904 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:56:04,904 INFO L85 PathProgramCache]: Analyzing trace with hash 2139766657, now seen corresponding path program 1 times [2024-06-28 00:56:04,904 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:56:04,905 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1970961193] [2024-06-28 00:56:04,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:56:04,905 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:56:04,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:56:05,005 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:56:05,006 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:56:05,006 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1970961193] [2024-06-28 00:56:05,006 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1970961193] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:56:05,006 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:56:05,006 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-28 00:56:05,006 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [72111953] [2024-06-28 00:56:05,006 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:56:05,006 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-28 00:56:05,007 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:56:05,007 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-28 00:56:05,007 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-28 00:56:05,041 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 45 [2024-06-28 00:56:05,041 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 143 places, 157 transitions, 1644 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) [2024-06-28 00:56:05,042 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:56:05,042 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 45 [2024-06-28 00:56:05,042 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:56:05,361 INFO L124 PetriNetUnfolderBase]: 2145/3493 cut-off events. [2024-06-28 00:56:05,361 INFO L125 PetriNetUnfolderBase]: For 40217/40217 co-relation queries the response was YES. [2024-06-28 00:56:05,376 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16851 conditions, 3493 events. 2145/3493 cut-off events. For 40217/40217 co-relation queries the response was YES. Maximal size of possible extension queue 219. Compared 21568 event pairs, 432 based on Foata normal form. 2/3478 useless extension candidates. Maximal degree in co-relation 16783. Up to 3105 conditions per place. [2024-06-28 00:56:05,387 INFO L140 encePairwiseOnDemand]: 39/45 looper letters, 141 selfloop transitions, 10 changer transitions 0/176 dead transitions. [2024-06-28 00:56:05,387 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 147 places, 176 transitions, 2006 flow [2024-06-28 00:56:05,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-28 00:56:05,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-28 00:56:05,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 139 transitions. [2024-06-28 00:56:05,388 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6177777777777778 [2024-06-28 00:56:05,388 INFO L175 Difference]: Start difference. First operand has 143 places, 157 transitions, 1644 flow. Second operand 5 states and 139 transitions. [2024-06-28 00:56:05,388 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 147 places, 176 transitions, 2006 flow [2024-06-28 00:56:05,451 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 145 places, 176 transitions, 1977 flow, removed 4 selfloop flow, removed 2 redundant places. [2024-06-28 00:56:05,453 INFO L231 Difference]: Finished difference. Result has 146 places, 159 transitions, 1658 flow [2024-06-28 00:56:05,453 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=1615, PETRI_DIFFERENCE_MINUEND_PLACES=141, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=157, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=147, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1658, PETRI_PLACES=146, PETRI_TRANSITIONS=159} [2024-06-28 00:56:05,453 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 97 predicate places. [2024-06-28 00:56:05,453 INFO L495 AbstractCegarLoop]: Abstraction has has 146 places, 159 transitions, 1658 flow [2024-06-28 00:56:05,454 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) [2024-06-28 00:56:05,454 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:56:05,454 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:56:05,454 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2024-06-28 00:56:05,454 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 00:56:05,454 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:56:05,454 INFO L85 PathProgramCache]: Analyzing trace with hash 1651245001, now seen corresponding path program 1 times [2024-06-28 00:56:05,454 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:56:05,455 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2136759854] [2024-06-28 00:56:05,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:56:05,455 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:56:05,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:56:05,532 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:56:05,532 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:56:05,532 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2136759854] [2024-06-28 00:56:05,532 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2136759854] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:56:05,532 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:56:05,532 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-28 00:56:05,533 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [191035712] [2024-06-28 00:56:05,533 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:56:05,533 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-28 00:56:05,533 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:56:05,533 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-28 00:56:05,533 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-28 00:56:05,553 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 45 [2024-06-28 00:56:05,554 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 146 places, 159 transitions, 1658 flow. Second operand has 6 states, 6 states have (on average 19.333333333333332) internal successors, (116), 6 states have internal predecessors, (116), 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) [2024-06-28 00:56:05,554 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:56:05,554 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 45 [2024-06-28 00:56:05,554 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:56:05,879 INFO L124 PetriNetUnfolderBase]: 2251/3674 cut-off events. [2024-06-28 00:56:05,879 INFO L125 PetriNetUnfolderBase]: For 44679/44691 co-relation queries the response was YES. [2024-06-28 00:56:05,894 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17807 conditions, 3674 events. 2251/3674 cut-off events. For 44679/44691 co-relation queries the response was YES. Maximal size of possible extension queue 225. Compared 22738 event pairs, 822 based on Foata normal form. 9/3663 useless extension candidates. Maximal degree in co-relation 17737. Up to 3226 conditions per place. [2024-06-28 00:56:05,905 INFO L140 encePairwiseOnDemand]: 37/45 looper letters, 140 selfloop transitions, 35 changer transitions 0/188 dead transitions. [2024-06-28 00:56:05,905 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 151 places, 188 transitions, 2176 flow [2024-06-28 00:56:05,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-28 00:56:05,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-28 00:56:05,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 166 transitions. [2024-06-28 00:56:05,906 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6148148148148148 [2024-06-28 00:56:05,906 INFO L175 Difference]: Start difference. First operand has 146 places, 159 transitions, 1658 flow. Second operand 6 states and 166 transitions. [2024-06-28 00:56:05,906 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 151 places, 188 transitions, 2176 flow [2024-06-28 00:56:05,975 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 148 places, 188 transitions, 2149 flow, removed 5 selfloop flow, removed 3 redundant places. [2024-06-28 00:56:05,978 INFO L231 Difference]: Finished difference. Result has 150 places, 164 transitions, 1762 flow [2024-06-28 00:56:05,978 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=1631, PETRI_DIFFERENCE_MINUEND_PLACES=143, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=159, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=128, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1762, PETRI_PLACES=150, PETRI_TRANSITIONS=164} [2024-06-28 00:56:05,979 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 101 predicate places. [2024-06-28 00:56:05,979 INFO L495 AbstractCegarLoop]: Abstraction has has 150 places, 164 transitions, 1762 flow [2024-06-28 00:56:05,979 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 19.333333333333332) internal successors, (116), 6 states have internal predecessors, (116), 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) [2024-06-28 00:56:05,979 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:56:05,980 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:56:05,980 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2024-06-28 00:56:05,980 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 00:56:05,980 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:56:05,980 INFO L85 PathProgramCache]: Analyzing trace with hash -1264180215, now seen corresponding path program 2 times [2024-06-28 00:56:05,980 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:56:05,980 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [102312145] [2024-06-28 00:56:05,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:56:05,981 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:56:05,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:56:06,068 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:56:06,068 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:56:06,068 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [102312145] [2024-06-28 00:56:06,068 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [102312145] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:56:06,068 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:56:06,068 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 00:56:06,069 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1206441837] [2024-06-28 00:56:06,069 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:56:06,069 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 00:56:06,069 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:56:06,069 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 00:56:06,069 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-28 00:56:06,087 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 45 [2024-06-28 00:56:06,087 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 150 places, 164 transitions, 1762 flow. Second operand has 7 states, 7 states have (on average 19.0) internal successors, (133), 7 states have internal predecessors, (133), 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) [2024-06-28 00:56:06,087 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:56:06,087 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 45 [2024-06-28 00:56:06,087 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:56:06,460 INFO L124 PetriNetUnfolderBase]: 2262/3661 cut-off events. [2024-06-28 00:56:06,460 INFO L125 PetriNetUnfolderBase]: For 46976/46976 co-relation queries the response was YES. [2024-06-28 00:56:06,476 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18080 conditions, 3661 events. 2262/3661 cut-off events. For 46976/46976 co-relation queries the response was YES. Maximal size of possible extension queue 227. Compared 22485 event pairs, 456 based on Foata normal form. 1/3653 useless extension candidates. Maximal degree in co-relation 18008. Up to 3238 conditions per place. [2024-06-28 00:56:06,487 INFO L140 encePairwiseOnDemand]: 36/45 looper letters, 141 selfloop transitions, 41 changer transitions 0/195 dead transitions. [2024-06-28 00:56:06,487 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 156 places, 195 transitions, 2348 flow [2024-06-28 00:56:06,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 00:56:06,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 00:56:06,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 192 transitions. [2024-06-28 00:56:06,488 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6095238095238096 [2024-06-28 00:56:06,488 INFO L175 Difference]: Start difference. First operand has 150 places, 164 transitions, 1762 flow. Second operand 7 states and 192 transitions. [2024-06-28 00:56:06,488 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 156 places, 195 transitions, 2348 flow [2024-06-28 00:56:06,554 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 152 places, 195 transitions, 2236 flow, removed 13 selfloop flow, removed 4 redundant places. [2024-06-28 00:56:06,556 INFO L231 Difference]: Finished difference. Result has 154 places, 168 transitions, 1793 flow [2024-06-28 00:56:06,557 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=1658, PETRI_DIFFERENCE_MINUEND_PLACES=146, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=164, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=126, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1793, PETRI_PLACES=154, PETRI_TRANSITIONS=168} [2024-06-28 00:56:06,557 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 105 predicate places. [2024-06-28 00:56:06,557 INFO L495 AbstractCegarLoop]: Abstraction has has 154 places, 168 transitions, 1793 flow [2024-06-28 00:56:06,557 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.0) internal successors, (133), 7 states have internal predecessors, (133), 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) [2024-06-28 00:56:06,557 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:56:06,557 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:56:06,557 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2024-06-28 00:56:06,557 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 00:56:06,558 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:56:06,558 INFO L85 PathProgramCache]: Analyzing trace with hash 1654969651, now seen corresponding path program 3 times [2024-06-28 00:56:06,558 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:56:06,558 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1972153359] [2024-06-28 00:56:06,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:56:06,558 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:56:06,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:56:06,637 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:56:06,637 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:56:06,637 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1972153359] [2024-06-28 00:56:06,637 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1972153359] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:56:06,637 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:56:06,637 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 00:56:06,637 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1592091172] [2024-06-28 00:56:06,637 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:56:06,637 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 00:56:06,637 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:56:06,638 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 00:56:06,638 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-28 00:56:06,665 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 45 [2024-06-28 00:56:06,665 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 154 places, 168 transitions, 1793 flow. Second operand has 7 states, 7 states have (on average 19.0) internal successors, (133), 7 states have internal predecessors, (133), 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) [2024-06-28 00:56:06,665 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:56:06,665 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 45 [2024-06-28 00:56:06,665 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:56:07,018 INFO L124 PetriNetUnfolderBase]: 2259/3679 cut-off events. [2024-06-28 00:56:07,018 INFO L125 PetriNetUnfolderBase]: For 48223/48223 co-relation queries the response was YES. [2024-06-28 00:56:07,034 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18104 conditions, 3679 events. 2259/3679 cut-off events. For 48223/48223 co-relation queries the response was YES. Maximal size of possible extension queue 226. Compared 22758 event pairs, 819 based on Foata normal form. 1/3662 useless extension candidates. Maximal degree in co-relation 18032. Up to 3235 conditions per place. [2024-06-28 00:56:07,046 INFO L140 encePairwiseOnDemand]: 36/45 looper letters, 145 selfloop transitions, 43 changer transitions 0/201 dead transitions. [2024-06-28 00:56:07,046 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 162 places, 201 transitions, 2313 flow [2024-06-28 00:56:07,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 00:56:07,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 00:56:07,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 235 transitions. [2024-06-28 00:56:07,047 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5802469135802469 [2024-06-28 00:56:07,047 INFO L175 Difference]: Start difference. First operand has 154 places, 168 transitions, 1793 flow. Second operand 9 states and 235 transitions. [2024-06-28 00:56:07,047 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 162 places, 201 transitions, 2313 flow [2024-06-28 00:56:07,124 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 157 places, 201 transitions, 2188 flow, removed 16 selfloop flow, removed 5 redundant places. [2024-06-28 00:56:07,126 INFO L231 Difference]: Finished difference. Result has 158 places, 169 transitions, 1770 flow [2024-06-28 00:56:07,127 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=1672, PETRI_DIFFERENCE_MINUEND_PLACES=149, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=168, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=126, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1770, PETRI_PLACES=158, PETRI_TRANSITIONS=169} [2024-06-28 00:56:07,127 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 109 predicate places. [2024-06-28 00:56:07,127 INFO L495 AbstractCegarLoop]: Abstraction has has 158 places, 169 transitions, 1770 flow [2024-06-28 00:56:07,127 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.0) internal successors, (133), 7 states have internal predecessors, (133), 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) [2024-06-28 00:56:07,127 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:56:07,127 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:56:07,127 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2024-06-28 00:56:07,127 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 00:56:07,128 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:56:07,128 INFO L85 PathProgramCache]: Analyzing trace with hash 1907981111, now seen corresponding path program 4 times [2024-06-28 00:56:07,128 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:56:07,128 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1424672122] [2024-06-28 00:56:07,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:56:07,128 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:56:07,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:56:07,207 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:56:07,208 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:56:07,208 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1424672122] [2024-06-28 00:56:07,208 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1424672122] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:56:07,208 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:56:07,208 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-28 00:56:07,208 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1094849700] [2024-06-28 00:56:07,208 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:56:07,208 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-28 00:56:07,208 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:56:07,209 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-28 00:56:07,209 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-28 00:56:07,230 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 45 [2024-06-28 00:56:07,230 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 158 places, 169 transitions, 1770 flow. Second operand has 6 states, 6 states have (on average 19.333333333333332) internal successors, (116), 6 states have internal predecessors, (116), 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) [2024-06-28 00:56:07,230 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:56:07,230 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 45 [2024-06-28 00:56:07,230 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:56:07,602 INFO L124 PetriNetUnfolderBase]: 2270/3710 cut-off events. [2024-06-28 00:56:07,602 INFO L125 PetriNetUnfolderBase]: For 50554/50554 co-relation queries the response was YES. [2024-06-28 00:56:07,620 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18229 conditions, 3710 events. 2270/3710 cut-off events. For 50554/50554 co-relation queries the response was YES. Maximal size of possible extension queue 228. Compared 23085 event pairs, 797 based on Foata normal form. 1/3700 useless extension candidates. Maximal degree in co-relation 18156. Up to 3296 conditions per place. [2024-06-28 00:56:07,633 INFO L140 encePairwiseOnDemand]: 36/45 looper letters, 157 selfloop transitions, 28 changer transitions 0/198 dead transitions. [2024-06-28 00:56:07,633 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 164 places, 198 transitions, 2295 flow [2024-06-28 00:56:07,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 00:56:07,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 00:56:07,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 188 transitions. [2024-06-28 00:56:07,634 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5968253968253968 [2024-06-28 00:56:07,634 INFO L175 Difference]: Start difference. First operand has 158 places, 169 transitions, 1770 flow. Second operand 7 states and 188 transitions. [2024-06-28 00:56:07,634 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 164 places, 198 transitions, 2295 flow [2024-06-28 00:56:07,739 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 157 places, 198 transitions, 2201 flow, removed 1 selfloop flow, removed 7 redundant places. [2024-06-28 00:56:07,741 INFO L231 Difference]: Finished difference. Result has 158 places, 172 transitions, 1770 flow [2024-06-28 00:56:07,741 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=1682, PETRI_DIFFERENCE_MINUEND_PLACES=151, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=169, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=144, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1770, PETRI_PLACES=158, PETRI_TRANSITIONS=172} [2024-06-28 00:56:07,742 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 109 predicate places. [2024-06-28 00:56:07,742 INFO L495 AbstractCegarLoop]: Abstraction has has 158 places, 172 transitions, 1770 flow [2024-06-28 00:56:07,742 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 19.333333333333332) internal successors, (116), 6 states have internal predecessors, (116), 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) [2024-06-28 00:56:07,742 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:56:07,742 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:56:07,742 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2024-06-28 00:56:07,742 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 00:56:07,742 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:56:07,742 INFO L85 PathProgramCache]: Analyzing trace with hash 1900623881, now seen corresponding path program 5 times [2024-06-28 00:56:07,742 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:56:07,742 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [220909259] [2024-06-28 00:56:07,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:56:07,743 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:56:07,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:56:07,819 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:56:07,819 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:56:07,819 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [220909259] [2024-06-28 00:56:07,819 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [220909259] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:56:07,819 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:56:07,819 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-28 00:56:07,819 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [384125981] [2024-06-28 00:56:07,819 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:56:07,820 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-28 00:56:07,820 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:56:07,820 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-28 00:56:07,820 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-28 00:56:07,836 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 45 [2024-06-28 00:56:07,837 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 158 places, 172 transitions, 1770 flow. Second operand has 6 states, 6 states have (on average 19.333333333333332) internal successors, (116), 6 states have internal predecessors, (116), 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) [2024-06-28 00:56:07,837 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:56:07,837 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 45 [2024-06-28 00:56:07,837 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:56:08,228 INFO L124 PetriNetUnfolderBase]: 2267/3651 cut-off events. [2024-06-28 00:56:08,228 INFO L125 PetriNetUnfolderBase]: For 51813/51813 co-relation queries the response was YES. [2024-06-28 00:56:08,247 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18141 conditions, 3651 events. 2267/3651 cut-off events. For 51813/51813 co-relation queries the response was YES. Maximal size of possible extension queue 226. Compared 22270 event pairs, 441 based on Foata normal form. 1/3648 useless extension candidates. Maximal degree in co-relation 18067. Up to 3293 conditions per place. [2024-06-28 00:56:08,259 INFO L140 encePairwiseOnDemand]: 36/45 looper letters, 156 selfloop transitions, 28 changer transitions 0/197 dead transitions. [2024-06-28 00:56:08,259 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 163 places, 197 transitions, 2204 flow [2024-06-28 00:56:08,260 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-28 00:56:08,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-28 00:56:08,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 169 transitions. [2024-06-28 00:56:08,260 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6259259259259259 [2024-06-28 00:56:08,260 INFO L175 Difference]: Start difference. First operand has 158 places, 172 transitions, 1770 flow. Second operand 6 states and 169 transitions. [2024-06-28 00:56:08,260 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 163 places, 197 transitions, 2204 flow [2024-06-28 00:56:08,351 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 159 places, 197 transitions, 2157 flow, removed 4 selfloop flow, removed 4 redundant places. [2024-06-28 00:56:08,353 INFO L231 Difference]: Finished difference. Result has 160 places, 172 transitions, 1785 flow [2024-06-28 00:56:08,353 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=1723, PETRI_DIFFERENCE_MINUEND_PLACES=154, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=172, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=144, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1785, PETRI_PLACES=160, PETRI_TRANSITIONS=172} [2024-06-28 00:56:08,354 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 111 predicate places. [2024-06-28 00:56:08,354 INFO L495 AbstractCegarLoop]: Abstraction has has 160 places, 172 transitions, 1785 flow [2024-06-28 00:56:08,354 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 19.333333333333332) internal successors, (116), 6 states have internal predecessors, (116), 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) [2024-06-28 00:56:08,354 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:56:08,354 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:56:08,354 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2024-06-28 00:56:08,354 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 00:56:08,354 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:56:08,354 INFO L85 PathProgramCache]: Analyzing trace with hash -272151076, now seen corresponding path program 1 times [2024-06-28 00:56:08,355 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:56:08,355 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1862491696] [2024-06-28 00:56:08,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:56:08,355 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:56:08,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:56:08,477 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:56:08,478 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:56:08,478 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1862491696] [2024-06-28 00:56:08,478 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1862491696] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:56:08,478 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:56:08,478 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 00:56:08,478 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [777413275] [2024-06-28 00:56:08,478 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:56:08,478 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 00:56:08,478 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:56:08,478 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 00:56:08,478 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-28 00:56:08,512 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 45 [2024-06-28 00:56:08,512 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 160 places, 172 transitions, 1785 flow. Second operand has 7 states, 7 states have (on average 19.0) internal successors, (133), 7 states have internal predecessors, (133), 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) [2024-06-28 00:56:08,513 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:56:08,513 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 45 [2024-06-28 00:56:08,513 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:56:08,894 INFO L124 PetriNetUnfolderBase]: 2292/3730 cut-off events. [2024-06-28 00:56:08,894 INFO L125 PetriNetUnfolderBase]: For 56237/56237 co-relation queries the response was YES. [2024-06-28 00:56:08,913 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18527 conditions, 3730 events. 2292/3730 cut-off events. For 56237/56237 co-relation queries the response was YES. Maximal size of possible extension queue 232. Compared 23150 event pairs, 464 based on Foata normal form. 1/3719 useless extension candidates. Maximal degree in co-relation 18452. Up to 3131 conditions per place. [2024-06-28 00:56:08,926 INFO L140 encePairwiseOnDemand]: 36/45 looper letters, 128 selfloop transitions, 62 changer transitions 0/203 dead transitions. [2024-06-28 00:56:08,926 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 165 places, 203 transitions, 2359 flow [2024-06-28 00:56:08,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-28 00:56:08,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-28 00:56:08,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 175 transitions. [2024-06-28 00:56:08,927 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6481481481481481 [2024-06-28 00:56:08,927 INFO L175 Difference]: Start difference. First operand has 160 places, 172 transitions, 1785 flow. Second operand 6 states and 175 transitions. [2024-06-28 00:56:08,927 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 165 places, 203 transitions, 2359 flow [2024-06-28 00:56:09,019 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 159 places, 203 transitions, 2282 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-06-28 00:56:09,021 INFO L231 Difference]: Finished difference. Result has 161 places, 178 transitions, 1962 flow [2024-06-28 00:56:09,021 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=1708, PETRI_DIFFERENCE_MINUEND_PLACES=154, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=172, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=58, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=112, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1962, PETRI_PLACES=161, PETRI_TRANSITIONS=178} [2024-06-28 00:56:09,021 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 112 predicate places. [2024-06-28 00:56:09,021 INFO L495 AbstractCegarLoop]: Abstraction has has 161 places, 178 transitions, 1962 flow [2024-06-28 00:56:09,022 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.0) internal successors, (133), 7 states have internal predecessors, (133), 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) [2024-06-28 00:56:09,022 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:56:09,022 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:56:09,022 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2024-06-28 00:56:09,022 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 00:56:09,022 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:56:09,022 INFO L85 PathProgramCache]: Analyzing trace with hash 426254190, now seen corresponding path program 2 times [2024-06-28 00:56:09,022 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:56:09,022 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1637678361] [2024-06-28 00:56:09,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:56:09,022 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:56:09,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:56:09,109 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:56:09,109 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:56:09,109 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1637678361] [2024-06-28 00:56:09,109 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1637678361] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:56:09,109 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:56:09,110 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 00:56:09,110 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1668881514] [2024-06-28 00:56:09,110 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:56:09,110 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 00:56:09,110 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:56:09,110 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 00:56:09,110 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-28 00:56:09,143 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 45 [2024-06-28 00:56:09,143 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 161 places, 178 transitions, 1962 flow. Second operand has 7 states, 7 states have (on average 19.0) internal successors, (133), 7 states have internal predecessors, (133), 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) [2024-06-28 00:56:09,143 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:56:09,143 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 45 [2024-06-28 00:56:09,143 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:56:09,521 INFO L124 PetriNetUnfolderBase]: 2303/3762 cut-off events. [2024-06-28 00:56:09,521 INFO L125 PetriNetUnfolderBase]: For 62912/62912 co-relation queries the response was YES. [2024-06-28 00:56:09,541 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19516 conditions, 3762 events. 2303/3762 cut-off events. For 62912/62912 co-relation queries the response was YES. Maximal size of possible extension queue 235. Compared 23428 event pairs, 504 based on Foata normal form. 1/3734 useless extension candidates. Maximal degree in co-relation 19439. Up to 3055 conditions per place. [2024-06-28 00:56:09,554 INFO L140 encePairwiseOnDemand]: 36/45 looper letters, 129 selfloop transitions, 71 changer transitions 0/213 dead transitions. [2024-06-28 00:56:09,554 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 166 places, 213 transitions, 2682 flow [2024-06-28 00:56:09,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-28 00:56:09,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-28 00:56:09,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 173 transitions. [2024-06-28 00:56:09,555 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6407407407407407 [2024-06-28 00:56:09,555 INFO L175 Difference]: Start difference. First operand has 161 places, 178 transitions, 1962 flow. Second operand 6 states and 173 transitions. [2024-06-28 00:56:09,555 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 166 places, 213 transitions, 2682 flow [2024-06-28 00:56:09,675 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 164 places, 213 transitions, 2608 flow, removed 20 selfloop flow, removed 2 redundant places. [2024-06-28 00:56:09,678 INFO L231 Difference]: Finished difference. Result has 166 places, 187 transitions, 2233 flow [2024-06-28 00:56:09,678 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=1896, PETRI_DIFFERENCE_MINUEND_PLACES=159, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=178, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=65, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=112, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2233, PETRI_PLACES=166, PETRI_TRANSITIONS=187} [2024-06-28 00:56:09,678 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 117 predicate places. [2024-06-28 00:56:09,678 INFO L495 AbstractCegarLoop]: Abstraction has has 166 places, 187 transitions, 2233 flow [2024-06-28 00:56:09,678 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.0) internal successors, (133), 7 states have internal predecessors, (133), 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) [2024-06-28 00:56:09,678 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:56:09,678 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:56:09,678 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2024-06-28 00:56:09,679 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 00:56:09,679 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:56:09,679 INFO L85 PathProgramCache]: Analyzing trace with hash 991976360, now seen corresponding path program 3 times [2024-06-28 00:56:09,679 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:56:09,679 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [974936481] [2024-06-28 00:56:09,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:56:09,679 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:56:09,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:56:09,770 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:56:09,770 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:56:09,770 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [974936481] [2024-06-28 00:56:09,770 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [974936481] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:56:09,770 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:56:09,770 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 00:56:09,770 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1414259285] [2024-06-28 00:56:09,770 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:56:09,770 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 00:56:09,770 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:56:09,771 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 00:56:09,771 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-28 00:56:09,801 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 45 [2024-06-28 00:56:09,802 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 166 places, 187 transitions, 2233 flow. Second operand has 7 states, 7 states have (on average 19.0) internal successors, (133), 7 states have internal predecessors, (133), 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) [2024-06-28 00:56:09,802 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:56:09,802 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 45 [2024-06-28 00:56:09,802 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:56:10,206 INFO L124 PetriNetUnfolderBase]: 2314/3781 cut-off events. [2024-06-28 00:56:10,206 INFO L125 PetriNetUnfolderBase]: For 66082/66082 co-relation queries the response was YES. [2024-06-28 00:56:10,227 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20489 conditions, 3781 events. 2314/3781 cut-off events. For 66082/66082 co-relation queries the response was YES. Maximal size of possible extension queue 236. Compared 23618 event pairs, 502 based on Foata normal form. 1/3755 useless extension candidates. Maximal degree in co-relation 20409. Up to 3063 conditions per place. [2024-06-28 00:56:10,242 INFO L140 encePairwiseOnDemand]: 36/45 looper letters, 125 selfloop transitions, 75 changer transitions 0/213 dead transitions. [2024-06-28 00:56:10,242 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 171 places, 213 transitions, 2864 flow [2024-06-28 00:56:10,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-28 00:56:10,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-28 00:56:10,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 171 transitions. [2024-06-28 00:56:10,243 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6333333333333333 [2024-06-28 00:56:10,243 INFO L175 Difference]: Start difference. First operand has 166 places, 187 transitions, 2233 flow. Second operand 6 states and 171 transitions. [2024-06-28 00:56:10,243 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 171 places, 213 transitions, 2864 flow [2024-06-28 00:56:10,413 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 170 places, 213 transitions, 2761 flow, removed 38 selfloop flow, removed 1 redundant places. [2024-06-28 00:56:10,415 INFO L231 Difference]: Finished difference. Result has 171 places, 190 transitions, 2337 flow [2024-06-28 00:56:10,416 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=2144, PETRI_DIFFERENCE_MINUEND_PLACES=165, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=187, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=72, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=115, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2337, PETRI_PLACES=171, PETRI_TRANSITIONS=190} [2024-06-28 00:56:10,416 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 122 predicate places. [2024-06-28 00:56:10,416 INFO L495 AbstractCegarLoop]: Abstraction has has 171 places, 190 transitions, 2337 flow [2024-06-28 00:56:10,416 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.0) internal successors, (133), 7 states have internal predecessors, (133), 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) [2024-06-28 00:56:10,416 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:56:10,416 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:56:10,416 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2024-06-28 00:56:10,417 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 00:56:10,417 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:56:10,417 INFO L85 PathProgramCache]: Analyzing trace with hash 991976732, now seen corresponding path program 1 times [2024-06-28 00:56:10,417 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:56:10,417 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1547890464] [2024-06-28 00:56:10,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:56:10,417 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:56:10,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:56:10,502 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:56:10,503 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:56:10,503 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1547890464] [2024-06-28 00:56:10,503 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1547890464] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:56:10,503 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:56:10,503 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 00:56:10,503 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1776651752] [2024-06-28 00:56:10,503 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:56:10,503 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 00:56:10,504 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:56:10,504 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 00:56:10,504 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-28 00:56:10,546 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 45 [2024-06-28 00:56:10,547 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 171 places, 190 transitions, 2337 flow. Second operand has 7 states, 7 states have (on average 19.0) internal successors, (133), 7 states have internal predecessors, (133), 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) [2024-06-28 00:56:10,547 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:56:10,547 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 45 [2024-06-28 00:56:10,547 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:56:11,015 INFO L124 PetriNetUnfolderBase]: 2353/3810 cut-off events. [2024-06-28 00:56:11,015 INFO L125 PetriNetUnfolderBase]: For 66684/66690 co-relation queries the response was YES. [2024-06-28 00:56:11,042 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20428 conditions, 3810 events. 2353/3810 cut-off events. For 66684/66690 co-relation queries the response was YES. Maximal size of possible extension queue 235. Compared 23540 event pairs, 481 based on Foata normal form. 5/3803 useless extension candidates. Maximal degree in co-relation 20345. Up to 3185 conditions per place. [2024-06-28 00:56:11,058 INFO L140 encePairwiseOnDemand]: 35/45 looper letters, 137 selfloop transitions, 80 changer transitions 0/230 dead transitions. [2024-06-28 00:56:11,058 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 178 places, 230 transitions, 3089 flow [2024-06-28 00:56:11,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 00:56:11,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 00:56:11,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 218 transitions. [2024-06-28 00:56:11,059 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6055555555555555 [2024-06-28 00:56:11,059 INFO L175 Difference]: Start difference. First operand has 171 places, 190 transitions, 2337 flow. Second operand 8 states and 218 transitions. [2024-06-28 00:56:11,059 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 178 places, 230 transitions, 3089 flow [2024-06-28 00:56:11,211 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 175 places, 230 transitions, 2945 flow, removed 12 selfloop flow, removed 3 redundant places. [2024-06-28 00:56:11,214 INFO L231 Difference]: Finished difference. Result has 177 places, 201 transitions, 2533 flow [2024-06-28 00:56:11,214 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=2193, PETRI_DIFFERENCE_MINUEND_PLACES=168, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=190, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=72, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=115, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2533, PETRI_PLACES=177, PETRI_TRANSITIONS=201} [2024-06-28 00:56:11,215 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 128 predicate places. [2024-06-28 00:56:11,215 INFO L495 AbstractCegarLoop]: Abstraction has has 177 places, 201 transitions, 2533 flow [2024-06-28 00:56:11,215 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.0) internal successors, (133), 7 states have internal predecessors, (133), 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) [2024-06-28 00:56:11,215 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:56:11,215 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:56:11,215 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2024-06-28 00:56:11,215 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 00:56:11,215 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:56:11,215 INFO L85 PathProgramCache]: Analyzing trace with hash 434714752, now seen corresponding path program 2 times [2024-06-28 00:56:11,215 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:56:11,216 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1759923024] [2024-06-28 00:56:11,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:56:11,216 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:56:11,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:56:11,317 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:56:11,317 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:56:11,317 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1759923024] [2024-06-28 00:56:11,317 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1759923024] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:56:11,317 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:56:11,317 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 00:56:11,317 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1033115035] [2024-06-28 00:56:11,317 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:56:11,318 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 00:56:11,318 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:56:11,318 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 00:56:11,318 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-28 00:56:11,386 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 45 [2024-06-28 00:56:11,386 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 177 places, 201 transitions, 2533 flow. Second operand has 7 states, 7 states have (on average 19.0) internal successors, (133), 7 states have internal predecessors, (133), 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) [2024-06-28 00:56:11,387 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:56:11,387 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 45 [2024-06-28 00:56:11,387 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:56:11,939 INFO L124 PetriNetUnfolderBase]: 2487/4012 cut-off events. [2024-06-28 00:56:11,940 INFO L125 PetriNetUnfolderBase]: For 76352/76352 co-relation queries the response was YES. [2024-06-28 00:56:11,963 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22859 conditions, 4012 events. 2487/4012 cut-off events. For 76352/76352 co-relation queries the response was YES. Maximal size of possible extension queue 249. Compared 24821 event pairs, 464 based on Foata normal form. 2/4007 useless extension candidates. Maximal degree in co-relation 22774. Up to 3372 conditions per place. [2024-06-28 00:56:11,981 INFO L140 encePairwiseOnDemand]: 34/45 looper letters, 169 selfloop transitions, 73 changer transitions 0/255 dead transitions. [2024-06-28 00:56:11,982 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 183 places, 255 transitions, 3673 flow [2024-06-28 00:56:11,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 00:56:11,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 00:56:11,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 198 transitions. [2024-06-28 00:56:11,997 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6285714285714286 [2024-06-28 00:56:11,997 INFO L175 Difference]: Start difference. First operand has 177 places, 201 transitions, 2533 flow. Second operand 7 states and 198 transitions. [2024-06-28 00:56:11,997 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 183 places, 255 transitions, 3673 flow [2024-06-28 00:56:12,199 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 179 places, 255 transitions, 3501 flow, removed 50 selfloop flow, removed 4 redundant places. [2024-06-28 00:56:12,202 INFO L231 Difference]: Finished difference. Result has 182 places, 225 transitions, 3052 flow [2024-06-28 00:56:12,202 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=2417, PETRI_DIFFERENCE_MINUEND_PLACES=173, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=201, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=132, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3052, PETRI_PLACES=182, PETRI_TRANSITIONS=225} [2024-06-28 00:56:12,203 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 133 predicate places. [2024-06-28 00:56:12,203 INFO L495 AbstractCegarLoop]: Abstraction has has 182 places, 225 transitions, 3052 flow [2024-06-28 00:56:12,203 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.0) internal successors, (133), 7 states have internal predecessors, (133), 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) [2024-06-28 00:56:12,203 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:56:12,203 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:56:12,203 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2024-06-28 00:56:12,203 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 00:56:12,203 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:56:12,204 INFO L85 PathProgramCache]: Analyzing trace with hash 1683896732, now seen corresponding path program 3 times [2024-06-28 00:56:12,204 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:56:12,204 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [388176416] [2024-06-28 00:56:12,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:56:12,204 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:56:12,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:56:12,312 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:56:12,312 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:56:12,313 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [388176416] [2024-06-28 00:56:12,313 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [388176416] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:56:12,313 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:56:12,313 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 00:56:12,313 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2093868893] [2024-06-28 00:56:12,313 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:56:12,313 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 00:56:12,314 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:56:12,314 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 00:56:12,314 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-28 00:56:12,340 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 45 [2024-06-28 00:56:12,341 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 182 places, 225 transitions, 3052 flow. Second operand has 7 states, 7 states have (on average 19.0) internal successors, (133), 7 states have internal predecessors, (133), 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) [2024-06-28 00:56:12,341 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:56:12,341 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 45 [2024-06-28 00:56:12,341 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:56:12,861 INFO L124 PetriNetUnfolderBase]: 2481/4205 cut-off events. [2024-06-28 00:56:12,861 INFO L125 PetriNetUnfolderBase]: For 80996/80996 co-relation queries the response was YES. [2024-06-28 00:56:12,888 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23838 conditions, 4205 events. 2481/4205 cut-off events. For 80996/80996 co-relation queries the response was YES. Maximal size of possible extension queue 251. Compared 27108 event pairs, 566 based on Foata normal form. 2/4194 useless extension candidates. Maximal degree in co-relation 23750. Up to 3368 conditions per place. [2024-06-28 00:56:12,905 INFO L140 encePairwiseOnDemand]: 34/45 looper letters, 166 selfloop transitions, 81 changer transitions 0/260 dead transitions. [2024-06-28 00:56:12,905 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 188 places, 260 transitions, 3816 flow [2024-06-28 00:56:12,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 00:56:12,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 00:56:12,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 202 transitions. [2024-06-28 00:56:12,906 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6412698412698413 [2024-06-28 00:56:12,906 INFO L175 Difference]: Start difference. First operand has 182 places, 225 transitions, 3052 flow. Second operand 7 states and 202 transitions. [2024-06-28 00:56:12,906 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 188 places, 260 transitions, 3816 flow [2024-06-28 00:56:13,122 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 185 places, 260 transitions, 3721 flow, removed 34 selfloop flow, removed 3 redundant places. [2024-06-28 00:56:13,126 INFO L231 Difference]: Finished difference. Result has 187 places, 231 transitions, 3305 flow [2024-06-28 00:56:13,126 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=2963, PETRI_DIFFERENCE_MINUEND_PLACES=179, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=225, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=75, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=146, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3305, PETRI_PLACES=187, PETRI_TRANSITIONS=231} [2024-06-28 00:56:13,127 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 138 predicate places. [2024-06-28 00:56:13,127 INFO L495 AbstractCegarLoop]: Abstraction has has 187 places, 231 transitions, 3305 flow [2024-06-28 00:56:13,127 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.0) internal successors, (133), 7 states have internal predecessors, (133), 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) [2024-06-28 00:56:13,127 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:56:13,127 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:56:13,127 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2024-06-28 00:56:13,127 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 00:56:13,127 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:56:13,127 INFO L85 PathProgramCache]: Analyzing trace with hash 434477230, now seen corresponding path program 4 times [2024-06-28 00:56:13,127 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:56:13,127 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1898218372] [2024-06-28 00:56:13,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:56:13,128 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:56:13,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:56:13,216 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:56:13,216 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:56:13,216 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1898218372] [2024-06-28 00:56:13,217 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1898218372] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:56:13,217 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:56:13,217 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 00:56:13,217 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1130199684] [2024-06-28 00:56:13,217 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:56:13,217 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 00:56:13,217 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:56:13,218 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 00:56:13,218 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-28 00:56:13,258 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 45 [2024-06-28 00:56:13,258 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 187 places, 231 transitions, 3305 flow. Second operand has 7 states, 7 states have (on average 19.0) internal successors, (133), 7 states have internal predecessors, (133), 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) [2024-06-28 00:56:13,258 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:56:13,258 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 45 [2024-06-28 00:56:13,258 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:56:13,760 INFO L124 PetriNetUnfolderBase]: 2492/4023 cut-off events. [2024-06-28 00:56:13,760 INFO L125 PetriNetUnfolderBase]: For 79015/79015 co-relation queries the response was YES. [2024-06-28 00:56:13,785 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24260 conditions, 4023 events. 2492/4023 cut-off events. For 79015/79015 co-relation queries the response was YES. Maximal size of possible extension queue 252. Compared 24972 event pairs, 464 based on Foata normal form. 1/4015 useless extension candidates. Maximal degree in co-relation 24170. Up to 3369 conditions per place. [2024-06-28 00:56:13,801 INFO L140 encePairwiseOnDemand]: 36/45 looper letters, 182 selfloop transitions, 67 changer transitions 0/262 dead transitions. [2024-06-28 00:56:13,801 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 192 places, 262 transitions, 3986 flow [2024-06-28 00:56:13,802 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-28 00:56:13,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-28 00:56:13,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 177 transitions. [2024-06-28 00:56:13,802 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6555555555555556 [2024-06-28 00:56:13,802 INFO L175 Difference]: Start difference. First operand has 187 places, 231 transitions, 3305 flow. Second operand 6 states and 177 transitions. [2024-06-28 00:56:13,802 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 192 places, 262 transitions, 3986 flow [2024-06-28 00:56:14,011 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 188 places, 262 transitions, 3831 flow, removed 37 selfloop flow, removed 4 redundant places. [2024-06-28 00:56:14,014 INFO L231 Difference]: Finished difference. Result has 190 places, 234 transitions, 3390 flow [2024-06-28 00:56:14,015 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=3152, PETRI_DIFFERENCE_MINUEND_PLACES=183, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=231, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=64, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=164, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3390, PETRI_PLACES=190, PETRI_TRANSITIONS=234} [2024-06-28 00:56:14,015 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 141 predicate places. [2024-06-28 00:56:14,015 INFO L495 AbstractCegarLoop]: Abstraction has has 190 places, 234 transitions, 3390 flow [2024-06-28 00:56:14,015 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.0) internal successors, (133), 7 states have internal predecessors, (133), 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) [2024-06-28 00:56:14,015 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:56:14,015 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:56:14,015 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2024-06-28 00:56:14,015 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 00:56:14,016 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:56:14,016 INFO L85 PathProgramCache]: Analyzing trace with hash 434723680, now seen corresponding path program 1 times [2024-06-28 00:56:14,016 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:56:14,016 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1830716034] [2024-06-28 00:56:14,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:56:14,016 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:56:14,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:56:14,108 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:56:14,108 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:56:14,109 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1830716034] [2024-06-28 00:56:14,109 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1830716034] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:56:14,109 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:56:14,109 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 00:56:14,109 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1637165485] [2024-06-28 00:56:14,109 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:56:14,109 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 00:56:14,110 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:56:14,110 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 00:56:14,110 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-28 00:56:14,156 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 45 [2024-06-28 00:56:14,156 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 190 places, 234 transitions, 3390 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) [2024-06-28 00:56:14,156 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:56:14,156 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 45 [2024-06-28 00:56:14,156 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:56:14,660 INFO L124 PetriNetUnfolderBase]: 2472/4067 cut-off events. [2024-06-28 00:56:14,660 INFO L125 PetriNetUnfolderBase]: For 89099/89133 co-relation queries the response was YES. [2024-06-28 00:56:14,685 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24189 conditions, 4067 events. 2472/4067 cut-off events. For 89099/89133 co-relation queries the response was YES. Maximal size of possible extension queue 258. Compared 25949 event pairs, 839 based on Foata normal form. 40/4057 useless extension candidates. Maximal degree in co-relation 24098. Up to 3360 conditions per place. [2024-06-28 00:56:14,701 INFO L140 encePairwiseOnDemand]: 38/45 looper letters, 196 selfloop transitions, 23 changer transitions 0/254 dead transitions. [2024-06-28 00:56:14,702 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 194 places, 254 transitions, 3906 flow [2024-06-28 00:56:14,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-28 00:56:14,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-28 00:56:14,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 144 transitions. [2024-06-28 00:56:14,702 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.64 [2024-06-28 00:56:14,702 INFO L175 Difference]: Start difference. First operand has 190 places, 234 transitions, 3390 flow. Second operand 5 states and 144 transitions. [2024-06-28 00:56:14,703 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 194 places, 254 transitions, 3906 flow [2024-06-28 00:56:14,891 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 190 places, 254 transitions, 3785 flow, removed 1 selfloop flow, removed 4 redundant places. [2024-06-28 00:56:14,894 INFO L231 Difference]: Finished difference. Result has 191 places, 235 transitions, 3338 flow [2024-06-28 00:56:14,895 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=3269, PETRI_DIFFERENCE_MINUEND_PLACES=186, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=234, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=211, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=3338, PETRI_PLACES=191, PETRI_TRANSITIONS=235} [2024-06-28 00:56:14,897 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 142 predicate places. [2024-06-28 00:56:14,898 INFO L495 AbstractCegarLoop]: Abstraction has has 191 places, 235 transitions, 3338 flow [2024-06-28 00:56:14,898 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) [2024-06-28 00:56:14,898 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:56:14,898 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:56:14,898 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2024-06-28 00:56:14,898 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 00:56:14,898 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:56:14,899 INFO L85 PathProgramCache]: Analyzing trace with hash 1970683420, now seen corresponding path program 4 times [2024-06-28 00:56:14,899 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:56:14,899 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [651414883] [2024-06-28 00:56:14,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:56:14,899 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:56:14,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:56:14,984 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:56:14,984 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:56:14,985 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [651414883] [2024-06-28 00:56:14,985 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [651414883] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:56:14,985 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:56:14,985 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 00:56:14,985 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1471017303] [2024-06-28 00:56:14,985 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:56:14,985 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 00:56:14,985 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:56:14,986 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 00:56:14,986 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-28 00:56:15,016 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 45 [2024-06-28 00:56:15,017 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 191 places, 235 transitions, 3338 flow. Second operand has 7 states, 7 states have (on average 19.0) internal successors, (133), 7 states have internal predecessors, (133), 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) [2024-06-28 00:56:15,017 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:56:15,017 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 45 [2024-06-28 00:56:15,017 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:56:15,521 INFO L124 PetriNetUnfolderBase]: 2585/4185 cut-off events. [2024-06-28 00:56:15,522 INFO L125 PetriNetUnfolderBase]: For 86732/86738 co-relation queries the response was YES. [2024-06-28 00:56:15,549 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25121 conditions, 4185 events. 2585/4185 cut-off events. For 86732/86738 co-relation queries the response was YES. Maximal size of possible extension queue 263. Compared 26279 event pairs, 537 based on Foata normal form. 5/4165 useless extension candidates. Maximal degree in co-relation 25028. Up to 3387 conditions per place. [2024-06-28 00:56:15,567 INFO L140 encePairwiseOnDemand]: 35/45 looper letters, 168 selfloop transitions, 91 changer transitions 0/272 dead transitions. [2024-06-28 00:56:15,567 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 197 places, 272 transitions, 4206 flow [2024-06-28 00:56:15,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 00:56:15,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 00:56:15,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 194 transitions. [2024-06-28 00:56:15,568 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6158730158730159 [2024-06-28 00:56:15,568 INFO L175 Difference]: Start difference. First operand has 191 places, 235 transitions, 3338 flow. Second operand 7 states and 194 transitions. [2024-06-28 00:56:15,568 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 197 places, 272 transitions, 4206 flow [2024-06-28 00:56:15,797 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 194 places, 272 transitions, 4165 flow, removed 1 selfloop flow, removed 3 redundant places. [2024-06-28 00:56:15,801 INFO L231 Difference]: Finished difference. Result has 196 places, 246 transitions, 3714 flow [2024-06-28 00:56:15,801 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=3297, PETRI_DIFFERENCE_MINUEND_PLACES=188, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=235, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=83, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=149, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3714, PETRI_PLACES=196, PETRI_TRANSITIONS=246} [2024-06-28 00:56:15,802 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 147 predicate places. [2024-06-28 00:56:15,802 INFO L495 AbstractCegarLoop]: Abstraction has has 196 places, 246 transitions, 3714 flow [2024-06-28 00:56:15,802 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.0) internal successors, (133), 7 states have internal predecessors, (133), 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) [2024-06-28 00:56:15,802 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:56:15,802 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:56:15,802 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2024-06-28 00:56:15,802 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 00:56:15,803 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:56:15,803 INFO L85 PathProgramCache]: Analyzing trace with hash -1210451516, now seen corresponding path program 5 times [2024-06-28 00:56:15,803 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:56:15,803 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1109800543] [2024-06-28 00:56:15,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:56:15,803 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:56:15,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:56:15,906 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:56:15,907 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:56:15,907 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1109800543] [2024-06-28 00:56:15,907 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1109800543] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:56:15,907 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:56:15,907 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 00:56:15,907 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [397172580] [2024-06-28 00:56:15,907 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:56:15,908 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 00:56:15,908 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:56:15,908 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 00:56:15,908 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-28 00:56:15,938 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 45 [2024-06-28 00:56:15,939 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 196 places, 246 transitions, 3714 flow. Second operand has 7 states, 7 states have (on average 19.0) internal successors, (133), 7 states have internal predecessors, (133), 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) [2024-06-28 00:56:15,939 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:56:15,939 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 45 [2024-06-28 00:56:15,939 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:56:16,657 INFO L124 PetriNetUnfolderBase]: 2582/4180 cut-off events. [2024-06-28 00:56:16,657 INFO L125 PetriNetUnfolderBase]: For 93387/93387 co-relation queries the response was YES. [2024-06-28 00:56:16,680 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26063 conditions, 4180 events. 2582/4180 cut-off events. For 93387/93387 co-relation queries the response was YES. Maximal size of possible extension queue 262. Compared 26279 event pairs, 472 based on Foata normal form. 1/4165 useless extension candidates. Maximal degree in co-relation 25968. Up to 3575 conditions per place. [2024-06-28 00:56:16,696 INFO L140 encePairwiseOnDemand]: 34/45 looper letters, 203 selfloop transitions, 60 changer transitions 0/276 dead transitions. [2024-06-28 00:56:16,696 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 202 places, 276 transitions, 4310 flow [2024-06-28 00:56:16,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 00:56:16,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 00:56:16,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 199 transitions. [2024-06-28 00:56:16,697 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6317460317460317 [2024-06-28 00:56:16,697 INFO L175 Difference]: Start difference. First operand has 196 places, 246 transitions, 3714 flow. Second operand 7 states and 199 transitions. [2024-06-28 00:56:16,697 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 202 places, 276 transitions, 4310 flow [2024-06-28 00:56:16,941 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 200 places, 276 transitions, 4222 flow, removed 36 selfloop flow, removed 2 redundant places. [2024-06-28 00:56:16,945 INFO L231 Difference]: Finished difference. Result has 201 places, 246 transitions, 3752 flow [2024-06-28 00:56:16,945 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=3626, PETRI_DIFFERENCE_MINUEND_PLACES=194, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=246, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=60, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=186, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3752, PETRI_PLACES=201, PETRI_TRANSITIONS=246} [2024-06-28 00:56:16,945 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 152 predicate places. [2024-06-28 00:56:16,946 INFO L495 AbstractCegarLoop]: Abstraction has has 201 places, 246 transitions, 3752 flow [2024-06-28 00:56:16,946 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.0) internal successors, (133), 7 states have internal predecessors, (133), 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) [2024-06-28 00:56:16,946 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:56:16,946 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:56:16,946 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2024-06-28 00:56:16,946 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 00:56:16,946 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:56:16,946 INFO L85 PathProgramCache]: Analyzing trace with hash -987848576, now seen corresponding path program 6 times [2024-06-28 00:56:16,947 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:56:16,947 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [673098541] [2024-06-28 00:56:16,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:56:16,947 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:56:16,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:56:17,046 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:56:17,046 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:56:17,046 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [673098541] [2024-06-28 00:56:17,046 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [673098541] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:56:17,046 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:56:17,046 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 00:56:17,046 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1774490490] [2024-06-28 00:56:17,047 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:56:17,047 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 00:56:17,047 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:56:17,047 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 00:56:17,047 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-28 00:56:17,098 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 45 [2024-06-28 00:56:17,098 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 201 places, 246 transitions, 3752 flow. Second operand has 7 states, 7 states have (on average 19.0) internal successors, (133), 7 states have internal predecessors, (133), 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) [2024-06-28 00:56:17,098 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:56:17,098 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 45 [2024-06-28 00:56:17,098 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:56:17,656 INFO L124 PetriNetUnfolderBase]: 2646/4244 cut-off events. [2024-06-28 00:56:17,656 INFO L125 PetriNetUnfolderBase]: For 99033/99033 co-relation queries the response was YES. [2024-06-28 00:56:17,685 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27063 conditions, 4244 events. 2646/4244 cut-off events. For 99033/99033 co-relation queries the response was YES. Maximal size of possible extension queue 271. Compared 26387 event pairs, 472 based on Foata normal form. 2/4239 useless extension candidates. Maximal degree in co-relation 26965. Up to 3464 conditions per place. [2024-06-28 00:56:17,704 INFO L140 encePairwiseOnDemand]: 34/45 looper letters, 178 selfloop transitions, 104 changer transitions 0/295 dead transitions. [2024-06-28 00:56:17,704 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 209 places, 295 transitions, 4809 flow [2024-06-28 00:56:17,709 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 00:56:17,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 00:56:17,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 247 transitions. [2024-06-28 00:56:17,710 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6098765432098765 [2024-06-28 00:56:17,710 INFO L175 Difference]: Start difference. First operand has 201 places, 246 transitions, 3752 flow. Second operand 9 states and 247 transitions. [2024-06-28 00:56:17,710 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 209 places, 295 transitions, 4809 flow [2024-06-28 00:56:17,943 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 203 places, 295 transitions, 4593 flow, removed 16 selfloop flow, removed 6 redundant places. [2024-06-28 00:56:17,947 INFO L231 Difference]: Finished difference. Result has 206 places, 261 transitions, 4074 flow [2024-06-28 00:56:17,948 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=3536, PETRI_DIFFERENCE_MINUEND_PLACES=195, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=246, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=91, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=146, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4074, PETRI_PLACES=206, PETRI_TRANSITIONS=261} [2024-06-28 00:56:17,948 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 157 predicate places. [2024-06-28 00:56:17,948 INFO L495 AbstractCegarLoop]: Abstraction has has 206 places, 261 transitions, 4074 flow [2024-06-28 00:56:17,948 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.0) internal successors, (133), 7 states have internal predecessors, (133), 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) [2024-06-28 00:56:17,948 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:56:17,949 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:56:17,949 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2024-06-28 00:56:17,949 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 00:56:17,949 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:56:17,949 INFO L85 PathProgramCache]: Analyzing trace with hash -1210035806, now seen corresponding path program 7 times [2024-06-28 00:56:17,949 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:56:17,949 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1628544332] [2024-06-28 00:56:17,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:56:17,950 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:56:17,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:56:18,048 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:56:18,048 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:56:18,048 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1628544332] [2024-06-28 00:56:18,049 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1628544332] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:56:18,049 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:56:18,049 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 00:56:18,049 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2001815500] [2024-06-28 00:56:18,049 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:56:18,049 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 00:56:18,049 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:56:18,050 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 00:56:18,050 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-28 00:56:18,081 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 45 [2024-06-28 00:56:18,082 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 206 places, 261 transitions, 4074 flow. Second operand has 7 states, 7 states have (on average 19.0) internal successors, (133), 7 states have internal predecessors, (133), 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) [2024-06-28 00:56:18,082 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:56:18,082 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 45 [2024-06-28 00:56:18,082 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:56:18,652 INFO L124 PetriNetUnfolderBase]: 2657/4318 cut-off events. [2024-06-28 00:56:18,652 INFO L125 PetriNetUnfolderBase]: For 108094/108094 co-relation queries the response was YES. [2024-06-28 00:56:18,682 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28024 conditions, 4318 events. 2657/4318 cut-off events. For 108094/108094 co-relation queries the response was YES. Maximal size of possible extension queue 274. Compared 27325 event pairs, 499 based on Foata normal form. 1/4297 useless extension candidates. Maximal degree in co-relation 27924. Up to 3472 conditions per place. [2024-06-28 00:56:18,702 INFO L140 encePairwiseOnDemand]: 34/45 looper letters, 170 selfloop transitions, 112 changer transitions 0/295 dead transitions. [2024-06-28 00:56:18,702 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 212 places, 295 transitions, 4954 flow [2024-06-28 00:56:18,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 00:56:18,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 00:56:18,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 202 transitions. [2024-06-28 00:56:18,703 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6412698412698413 [2024-06-28 00:56:18,704 INFO L175 Difference]: Start difference. First operand has 206 places, 261 transitions, 4074 flow. Second operand 7 states and 202 transitions. [2024-06-28 00:56:18,704 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 212 places, 295 transitions, 4954 flow [2024-06-28 00:56:19,008 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 208 places, 295 transitions, 4747 flow, removed 68 selfloop flow, removed 4 redundant places. [2024-06-28 00:56:19,012 INFO L231 Difference]: Finished difference. Result has 209 places, 264 transitions, 4160 flow [2024-06-28 00:56:19,012 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=3873, PETRI_DIFFERENCE_MINUEND_PLACES=202, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=261, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=109, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=152, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4160, PETRI_PLACES=209, PETRI_TRANSITIONS=264} [2024-06-28 00:56:19,012 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 160 predicate places. [2024-06-28 00:56:19,012 INFO L495 AbstractCegarLoop]: Abstraction has has 209 places, 264 transitions, 4160 flow [2024-06-28 00:56:19,012 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.0) internal successors, (133), 7 states have internal predecessors, (133), 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) [2024-06-28 00:56:19,013 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:56:19,013 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:56:19,013 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2024-06-28 00:56:19,013 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 00:56:19,013 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:56:19,013 INFO L85 PathProgramCache]: Analyzing trace with hash -982134656, now seen corresponding path program 8 times [2024-06-28 00:56:19,013 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:56:19,014 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1644968846] [2024-06-28 00:56:19,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:56:19,014 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:56:19,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:56:19,096 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:56:19,096 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:56:19,096 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1644968846] [2024-06-28 00:56:19,097 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1644968846] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:56:19,097 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:56:19,097 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 00:56:19,097 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [140884161] [2024-06-28 00:56:19,097 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:56:19,097 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 00:56:19,097 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:56:19,098 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 00:56:19,098 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-28 00:56:19,130 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 45 [2024-06-28 00:56:19,131 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 209 places, 264 transitions, 4160 flow. Second operand has 7 states, 7 states have (on average 19.0) internal successors, (133), 7 states have internal predecessors, (133), 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) [2024-06-28 00:56:19,131 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:56:19,131 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 45 [2024-06-28 00:56:19,131 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:56:19,708 INFO L124 PetriNetUnfolderBase]: 2654/4263 cut-off events. [2024-06-28 00:56:19,708 INFO L125 PetriNetUnfolderBase]: For 108105/108105 co-relation queries the response was YES. [2024-06-28 00:56:19,738 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28179 conditions, 4263 events. 2654/4263 cut-off events. For 108105/108105 co-relation queries the response was YES. Maximal size of possible extension queue 274. Compared 26582 event pairs, 478 based on Foata normal form. 1/4257 useless extension candidates. Maximal degree in co-relation 28077. Up to 3470 conditions per place. [2024-06-28 00:56:19,756 INFO L140 encePairwiseOnDemand]: 34/45 looper letters, 175 selfloop transitions, 106 changer transitions 0/294 dead transitions. [2024-06-28 00:56:19,756 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 216 places, 294 transitions, 4897 flow [2024-06-28 00:56:19,757 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 00:56:19,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 00:56:19,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 221 transitions. [2024-06-28 00:56:19,757 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6138888888888889 [2024-06-28 00:56:19,757 INFO L175 Difference]: Start difference. First operand has 209 places, 264 transitions, 4160 flow. Second operand 8 states and 221 transitions. [2024-06-28 00:56:19,757 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 216 places, 294 transitions, 4897 flow [2024-06-28 00:56:20,175 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 213 places, 294 transitions, 4727 flow, removed 28 selfloop flow, removed 3 redundant places. [2024-06-28 00:56:20,179 INFO L231 Difference]: Finished difference. Result has 214 places, 264 transitions, 4208 flow [2024-06-28 00:56:20,180 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=3990, PETRI_DIFFERENCE_MINUEND_PLACES=206, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=264, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=106, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=158, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4208, PETRI_PLACES=214, PETRI_TRANSITIONS=264} [2024-06-28 00:56:20,180 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 165 predicate places. [2024-06-28 00:56:20,180 INFO L495 AbstractCegarLoop]: Abstraction has has 214 places, 264 transitions, 4208 flow [2024-06-28 00:56:20,180 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.0) internal successors, (133), 7 states have internal predecessors, (133), 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) [2024-06-28 00:56:20,180 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:56:20,180 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:56:20,180 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2024-06-28 00:56:20,181 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 00:56:20,181 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:56:20,181 INFO L85 PathProgramCache]: Analyzing trace with hash -987839648, now seen corresponding path program 2 times [2024-06-28 00:56:20,181 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:56:20,181 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1483843188] [2024-06-28 00:56:20,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:56:20,182 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:56:20,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:56:20,295 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:56:20,295 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:56:20,295 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1483843188] [2024-06-28 00:56:20,295 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1483843188] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:56:20,295 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:56:20,295 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 00:56:20,296 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1461502674] [2024-06-28 00:56:20,296 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:56:20,296 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 00:56:20,296 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:56:20,297 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 00:56:20,297 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-28 00:56:20,345 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 45 [2024-06-28 00:56:20,345 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 214 places, 264 transitions, 4208 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) [2024-06-28 00:56:20,345 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:56:20,345 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 45 [2024-06-28 00:56:20,345 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:56:20,973 INFO L124 PetriNetUnfolderBase]: 2640/4358 cut-off events. [2024-06-28 00:56:20,973 INFO L125 PetriNetUnfolderBase]: For 123093/123113 co-relation queries the response was YES. [2024-06-28 00:56:21,006 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28182 conditions, 4358 events. 2640/4358 cut-off events. For 123093/123113 co-relation queries the response was YES. Maximal size of possible extension queue 278. Compared 28208 event pairs, 880 based on Foata normal form. 30/4333 useless extension candidates. Maximal degree in co-relation 28079. Up to 3584 conditions per place. [2024-06-28 00:56:21,029 INFO L140 encePairwiseOnDemand]: 38/45 looper letters, 219 selfloop transitions, 26 changer transitions 0/287 dead transitions. [2024-06-28 00:56:21,029 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 219 places, 287 transitions, 4790 flow [2024-06-28 00:56:21,030 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-28 00:56:21,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-28 00:56:21,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 167 transitions. [2024-06-28 00:56:21,030 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6185185185185185 [2024-06-28 00:56:21,030 INFO L175 Difference]: Start difference. First operand has 214 places, 264 transitions, 4208 flow. Second operand 6 states and 167 transitions. [2024-06-28 00:56:21,030 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 219 places, 287 transitions, 4790 flow [2024-06-28 00:56:21,375 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 213 places, 287 transitions, 4552 flow, removed 11 selfloop flow, removed 6 redundant places. [2024-06-28 00:56:21,379 INFO L231 Difference]: Finished difference. Result has 214 places, 265 transitions, 4044 flow [2024-06-28 00:56:21,379 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=3970, PETRI_DIFFERENCE_MINUEND_PLACES=208, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=264, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=238, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=4044, PETRI_PLACES=214, PETRI_TRANSITIONS=265} [2024-06-28 00:56:21,380 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 165 predicate places. [2024-06-28 00:56:21,380 INFO L495 AbstractCegarLoop]: Abstraction has has 214 places, 265 transitions, 4044 flow [2024-06-28 00:56:21,380 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) [2024-06-28 00:56:21,380 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:56:21,380 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:56:21,380 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2024-06-28 00:56:21,380 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 00:56:21,380 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:56:21,380 INFO L85 PathProgramCache]: Analyzing trace with hash -987422078, now seen corresponding path program 3 times [2024-06-28 00:56:21,380 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:56:21,380 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [251362952] [2024-06-28 00:56:21,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:56:21,381 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:56:21,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:56:21,474 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:56:21,474 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:56:21,474 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [251362952] [2024-06-28 00:56:21,474 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [251362952] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:56:21,474 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:56:21,474 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 00:56:21,474 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [810479080] [2024-06-28 00:56:21,475 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:56:21,475 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 00:56:21,475 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:56:21,475 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 00:56:21,475 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-28 00:56:21,504 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 45 [2024-06-28 00:56:21,505 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 214 places, 265 transitions, 4044 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) [2024-06-28 00:56:21,505 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:56:21,505 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 45 [2024-06-28 00:56:21,505 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:56:22,097 INFO L124 PetriNetUnfolderBase]: 2642/4281 cut-off events. [2024-06-28 00:56:22,097 INFO L125 PetriNetUnfolderBase]: For 117246/117246 co-relation queries the response was YES. [2024-06-28 00:56:22,125 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27789 conditions, 4281 events. 2642/4281 cut-off events. For 117246/117246 co-relation queries the response was YES. Maximal size of possible extension queue 278. Compared 27218 event pairs, 462 based on Foata normal form. 8/4264 useless extension candidates. Maximal degree in co-relation 27685. Up to 3442 conditions per place. [2024-06-28 00:56:22,144 INFO L140 encePairwiseOnDemand]: 38/45 looper letters, 220 selfloop transitions, 29 changer transitions 0/291 dead transitions. [2024-06-28 00:56:22,144 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 219 places, 291 transitions, 4658 flow [2024-06-28 00:56:22,144 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-28 00:56:22,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-28 00:56:22,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 169 transitions. [2024-06-28 00:56:22,145 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6259259259259259 [2024-06-28 00:56:22,145 INFO L175 Difference]: Start difference. First operand has 214 places, 265 transitions, 4044 flow. Second operand 6 states and 169 transitions. [2024-06-28 00:56:22,145 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 219 places, 291 transitions, 4658 flow [2024-06-28 00:56:22,415 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 215 places, 291 transitions, 4594 flow, removed 8 selfloop flow, removed 4 redundant places. [2024-06-28 00:56:22,418 INFO L231 Difference]: Finished difference. Result has 216 places, 266 transitions, 4060 flow [2024-06-28 00:56:22,419 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=3980, PETRI_DIFFERENCE_MINUEND_PLACES=210, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=265, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=236, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=4060, PETRI_PLACES=216, PETRI_TRANSITIONS=266} [2024-06-28 00:56:22,419 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 167 predicate places. [2024-06-28 00:56:22,419 INFO L495 AbstractCegarLoop]: Abstraction has has 216 places, 266 transitions, 4060 flow [2024-06-28 00:56:22,419 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) [2024-06-28 00:56:22,419 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:56:22,419 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:56:22,419 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2024-06-28 00:56:22,419 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 00:56:22,420 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:56:22,420 INFO L85 PathProgramCache]: Analyzing trace with hash -353873272, now seen corresponding path program 1 times [2024-06-28 00:56:22,420 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:56:22,420 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1122967226] [2024-06-28 00:56:22,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:56:22,420 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:56:22,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:56:22,504 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:56:22,504 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:56:22,504 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1122967226] [2024-06-28 00:56:22,504 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1122967226] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:56:22,504 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:56:22,504 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-28 00:56:22,504 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [541529562] [2024-06-28 00:56:22,505 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:56:22,505 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-28 00:56:22,505 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:56:22,506 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-28 00:56:22,507 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-28 00:56:22,529 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 45 [2024-06-28 00:56:22,529 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 216 places, 266 transitions, 4060 flow. Second operand has 6 states, 6 states have (on average 20.333333333333332) internal successors, (122), 6 states have internal predecessors, (122), 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) [2024-06-28 00:56:22,529 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:56:22,529 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 45 [2024-06-28 00:56:22,529 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:56:23,098 INFO L124 PetriNetUnfolderBase]: 2690/4366 cut-off events. [2024-06-28 00:56:23,098 INFO L125 PetriNetUnfolderBase]: For 124037/124067 co-relation queries the response was YES. [2024-06-28 00:56:23,129 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28541 conditions, 4366 events. 2690/4366 cut-off events. For 124037/124067 co-relation queries the response was YES. Maximal size of possible extension queue 282. Compared 27994 event pairs, 423 based on Foata normal form. 27/4366 useless extension candidates. Maximal degree in co-relation 28436. Up to 3564 conditions per place. [2024-06-28 00:56:23,149 INFO L140 encePairwiseOnDemand]: 38/45 looper letters, 214 selfloop transitions, 54 changer transitions 0/298 dead transitions. [2024-06-28 00:56:23,149 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 221 places, 298 transitions, 4818 flow [2024-06-28 00:56:23,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-28 00:56:23,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-28 00:56:23,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 173 transitions. [2024-06-28 00:56:23,150 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6407407407407407 [2024-06-28 00:56:23,150 INFO L175 Difference]: Start difference. First operand has 216 places, 266 transitions, 4060 flow. Second operand 6 states and 173 transitions. [2024-06-28 00:56:23,150 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 221 places, 298 transitions, 4818 flow [2024-06-28 00:56:23,407 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 217 places, 298 transitions, 4754 flow, removed 4 selfloop flow, removed 4 redundant places. [2024-06-28 00:56:23,412 INFO L231 Difference]: Finished difference. Result has 219 places, 271 transitions, 4207 flow [2024-06-28 00:56:23,413 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=3996, PETRI_DIFFERENCE_MINUEND_PLACES=212, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=266, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=214, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=4207, PETRI_PLACES=219, PETRI_TRANSITIONS=271} [2024-06-28 00:56:23,413 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 170 predicate places. [2024-06-28 00:56:23,413 INFO L495 AbstractCegarLoop]: Abstraction has has 219 places, 271 transitions, 4207 flow [2024-06-28 00:56:23,413 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 20.333333333333332) internal successors, (122), 6 states have internal predecessors, (122), 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) [2024-06-28 00:56:23,413 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:56:23,414 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:56:23,414 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2024-06-28 00:56:23,414 INFO L420 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 00:56:23,414 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:56:23,414 INFO L85 PathProgramCache]: Analyzing trace with hash -480968952, now seen corresponding path program 2 times [2024-06-28 00:56:23,414 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:56:23,414 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1563204175] [2024-06-28 00:56:23,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:56:23,415 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:56:23,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:56:23,491 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:56:23,492 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:56:23,492 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1563204175] [2024-06-28 00:56:23,492 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1563204175] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:56:23,492 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:56:23,492 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-28 00:56:23,492 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [752402610] [2024-06-28 00:56:23,492 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:56:23,492 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-28 00:56:23,492 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:56:23,492 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-28 00:56:23,492 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-28 00:56:23,530 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 45 [2024-06-28 00:56:23,531 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 219 places, 271 transitions, 4207 flow. Second operand has 6 states, 6 states have (on average 20.333333333333332) internal successors, (122), 6 states have internal predecessors, (122), 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) [2024-06-28 00:56:23,531 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:56:23,531 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 45 [2024-06-28 00:56:23,531 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:56:24,116 INFO L124 PetriNetUnfolderBase]: 2716/4401 cut-off events. [2024-06-28 00:56:24,116 INFO L125 PetriNetUnfolderBase]: For 131073/131103 co-relation queries the response was YES. [2024-06-28 00:56:24,146 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29149 conditions, 4401 events. 2716/4401 cut-off events. For 131073/131103 co-relation queries the response was YES. Maximal size of possible extension queue 284. Compared 28280 event pairs, 482 based on Foata normal form. 27/4401 useless extension candidates. Maximal degree in co-relation 29042. Up to 3749 conditions per place. [2024-06-28 00:56:24,166 INFO L140 encePairwiseOnDemand]: 38/45 looper letters, 214 selfloop transitions, 51 changer transitions 0/295 dead transitions. [2024-06-28 00:56:24,166 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 224 places, 295 transitions, 4825 flow [2024-06-28 00:56:24,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-28 00:56:24,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-28 00:56:24,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 168 transitions. [2024-06-28 00:56:24,167 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6222222222222222 [2024-06-28 00:56:24,167 INFO L175 Difference]: Start difference. First operand has 219 places, 271 transitions, 4207 flow. Second operand 6 states and 168 transitions. [2024-06-28 00:56:24,167 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 224 places, 295 transitions, 4825 flow [2024-06-28 00:56:24,505 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 222 places, 295 transitions, 4707 flow, removed 32 selfloop flow, removed 2 redundant places. [2024-06-28 00:56:24,509 INFO L231 Difference]: Finished difference. Result has 223 places, 273 transitions, 4239 flow [2024-06-28 00:56:24,509 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=4105, PETRI_DIFFERENCE_MINUEND_PLACES=217, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=271, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=220, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=4239, PETRI_PLACES=223, PETRI_TRANSITIONS=273} [2024-06-28 00:56:24,510 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 174 predicate places. [2024-06-28 00:56:24,510 INFO L495 AbstractCegarLoop]: Abstraction has has 223 places, 273 transitions, 4239 flow [2024-06-28 00:56:24,510 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 20.333333333333332) internal successors, (122), 6 states have internal predecessors, (122), 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) [2024-06-28 00:56:24,510 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:56:24,510 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:56:24,510 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2024-06-28 00:56:24,510 INFO L420 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 00:56:24,510 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:56:24,510 INFO L85 PathProgramCache]: Analyzing trace with hash -534884792, now seen corresponding path program 3 times [2024-06-28 00:56:24,510 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:56:24,510 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1249548878] [2024-06-28 00:56:24,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:56:24,511 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:56:24,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:56:24,608 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:56:24,609 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:56:24,609 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1249548878] [2024-06-28 00:56:24,609 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1249548878] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:56:24,609 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:56:24,609 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 00:56:24,609 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1321725578] [2024-06-28 00:56:24,609 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:56:24,610 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 00:56:24,610 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:56:24,612 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 00:56:24,612 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-28 00:56:24,659 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 45 [2024-06-28 00:56:24,660 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 223 places, 273 transitions, 4239 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) [2024-06-28 00:56:24,660 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:56:24,660 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 45 [2024-06-28 00:56:24,660 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:56:25,259 INFO L124 PetriNetUnfolderBase]: 2706/4389 cut-off events. [2024-06-28 00:56:25,260 INFO L125 PetriNetUnfolderBase]: For 128522/128522 co-relation queries the response was YES. [2024-06-28 00:56:25,293 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28891 conditions, 4389 events. 2706/4389 cut-off events. For 128522/128522 co-relation queries the response was YES. Maximal size of possible extension queue 283. Compared 28137 event pairs, 489 based on Foata normal form. 4/4369 useless extension candidates. Maximal degree in co-relation 28782. Up to 3737 conditions per place. [2024-06-28 00:56:25,313 INFO L140 encePairwiseOnDemand]: 37/45 looper letters, 213 selfloop transitions, 55 changer transitions 0/298 dead transitions. [2024-06-28 00:56:25,313 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 229 places, 298 transitions, 4831 flow [2024-06-28 00:56:25,314 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 00:56:25,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 00:56:25,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 192 transitions. [2024-06-28 00:56:25,314 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6095238095238096 [2024-06-28 00:56:25,314 INFO L175 Difference]: Start difference. First operand has 223 places, 273 transitions, 4239 flow. Second operand 7 states and 192 transitions. [2024-06-28 00:56:25,314 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 229 places, 298 transitions, 4831 flow [2024-06-28 00:56:25,665 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 225 places, 298 transitions, 4713 flow, removed 10 selfloop flow, removed 4 redundant places. [2024-06-28 00:56:25,669 INFO L231 Difference]: Finished difference. Result has 226 places, 273 transitions, 4237 flow [2024-06-28 00:56:25,669 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=4121, PETRI_DIFFERENCE_MINUEND_PLACES=219, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=273, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=55, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=218, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4237, PETRI_PLACES=226, PETRI_TRANSITIONS=273} [2024-06-28 00:56:25,670 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 177 predicate places. [2024-06-28 00:56:25,670 INFO L495 AbstractCegarLoop]: Abstraction has has 226 places, 273 transitions, 4237 flow [2024-06-28 00:56:25,670 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) [2024-06-28 00:56:25,670 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:56:25,670 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:56:25,670 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2024-06-28 00:56:25,671 INFO L420 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 00:56:25,671 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:56:25,671 INFO L85 PathProgramCache]: Analyzing trace with hash -235540444, now seen corresponding path program 1 times [2024-06-28 00:56:25,671 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:56:25,671 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1978118001] [2024-06-28 00:56:25,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:56:25,671 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:56:25,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:56:25,752 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:56:25,753 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:56:25,753 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1978118001] [2024-06-28 00:56:25,753 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1978118001] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:56:25,753 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:56:25,753 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 00:56:25,753 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1435755046] [2024-06-28 00:56:25,754 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:56:25,754 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 00:56:25,755 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:56:25,755 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 00:56:25,755 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-28 00:56:25,782 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 45 [2024-06-28 00:56:25,783 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 226 places, 273 transitions, 4237 flow. Second operand has 7 states, 7 states have (on average 19.0) internal successors, (133), 7 states have internal predecessors, (133), 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) [2024-06-28 00:56:25,783 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:56:25,783 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 45 [2024-06-28 00:56:25,783 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:56:26,404 INFO L124 PetriNetUnfolderBase]: 2834/4609 cut-off events. [2024-06-28 00:56:26,404 INFO L125 PetriNetUnfolderBase]: For 129416/129416 co-relation queries the response was YES. [2024-06-28 00:56:26,441 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29724 conditions, 4609 events. 2834/4609 cut-off events. For 129416/129416 co-relation queries the response was YES. Maximal size of possible extension queue 293. Compared 29753 event pairs, 949 based on Foata normal form. 2/4580 useless extension candidates. Maximal degree in co-relation 29614. Up to 4037 conditions per place. [2024-06-28 00:56:26,463 INFO L140 encePairwiseOnDemand]: 36/45 looper letters, 241 selfloop transitions, 47 changer transitions 0/301 dead transitions. [2024-06-28 00:56:26,463 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 232 places, 301 transitions, 4913 flow [2024-06-28 00:56:26,463 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 00:56:26,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 00:56:26,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 188 transitions. [2024-06-28 00:56:26,464 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5968253968253968 [2024-06-28 00:56:26,464 INFO L175 Difference]: Start difference. First operand has 226 places, 273 transitions, 4237 flow. Second operand 7 states and 188 transitions. [2024-06-28 00:56:26,464 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 232 places, 301 transitions, 4913 flow [2024-06-28 00:56:26,842 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 227 places, 301 transitions, 4797 flow, removed 5 selfloop flow, removed 5 redundant places. [2024-06-28 00:56:26,846 INFO L231 Difference]: Finished difference. Result has 228 places, 275 transitions, 4258 flow [2024-06-28 00:56:26,847 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=4121, PETRI_DIFFERENCE_MINUEND_PLACES=221, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=273, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=226, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4258, PETRI_PLACES=228, PETRI_TRANSITIONS=275} [2024-06-28 00:56:26,847 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 179 predicate places. [2024-06-28 00:56:26,847 INFO L495 AbstractCegarLoop]: Abstraction has has 228 places, 275 transitions, 4258 flow [2024-06-28 00:56:26,847 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.0) internal successors, (133), 7 states have internal predecessors, (133), 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) [2024-06-28 00:56:26,847 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:56:26,847 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:56:26,848 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2024-06-28 00:56:26,848 INFO L420 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 00:56:26,848 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:56:26,848 INFO L85 PathProgramCache]: Analyzing trace with hash -973845566, now seen corresponding path program 2 times [2024-06-28 00:56:26,848 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:56:26,848 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [258555319] [2024-06-28 00:56:26,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:56:26,849 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:56:26,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:56:26,939 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:56:26,939 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:56:26,939 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [258555319] [2024-06-28 00:56:26,939 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [258555319] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:56:26,939 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:56:26,939 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 00:56:26,939 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1243356188] [2024-06-28 00:56:26,940 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:56:26,940 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 00:56:26,940 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:56:26,940 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 00:56:26,940 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-28 00:56:26,987 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 45 [2024-06-28 00:56:26,987 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 228 places, 275 transitions, 4258 flow. Second operand has 7 states, 7 states have (on average 19.0) internal successors, (133), 7 states have internal predecessors, (133), 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) [2024-06-28 00:56:26,987 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:56:26,987 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 45 [2024-06-28 00:56:26,987 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:56:27,660 INFO L124 PetriNetUnfolderBase]: 2852/4627 cut-off events. [2024-06-28 00:56:27,660 INFO L125 PetriNetUnfolderBase]: For 134319/134319 co-relation queries the response was YES. [2024-06-28 00:56:27,704 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30077 conditions, 4627 events. 2852/4627 cut-off events. For 134319/134319 co-relation queries the response was YES. Maximal size of possible extension queue 295. Compared 29781 event pairs, 946 based on Foata normal form. 2/4602 useless extension candidates. Maximal degree in co-relation 29966. Up to 4112 conditions per place. [2024-06-28 00:56:27,724 INFO L140 encePairwiseOnDemand]: 36/45 looper letters, 264 selfloop transitions, 29 changer transitions 0/306 dead transitions. [2024-06-28 00:56:27,724 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 235 places, 306 transitions, 4954 flow [2024-06-28 00:56:27,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 00:56:27,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 00:56:27,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 210 transitions. [2024-06-28 00:56:27,725 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5833333333333334 [2024-06-28 00:56:27,726 INFO L175 Difference]: Start difference. First operand has 228 places, 275 transitions, 4258 flow. Second operand 8 states and 210 transitions. [2024-06-28 00:56:27,726 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 235 places, 306 transitions, 4954 flow [2024-06-28 00:56:28,224 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 231 places, 306 transitions, 4837 flow, removed 15 selfloop flow, removed 4 redundant places. [2024-06-28 00:56:28,228 INFO L231 Difference]: Finished difference. Result has 232 places, 277 transitions, 4246 flow [2024-06-28 00:56:28,228 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=4141, PETRI_DIFFERENCE_MINUEND_PLACES=224, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=275, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=246, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4246, PETRI_PLACES=232, PETRI_TRANSITIONS=277} [2024-06-28 00:56:28,228 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 183 predicate places. [2024-06-28 00:56:28,228 INFO L495 AbstractCegarLoop]: Abstraction has has 232 places, 277 transitions, 4246 flow [2024-06-28 00:56:28,228 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.0) internal successors, (133), 7 states have internal predecessors, (133), 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) [2024-06-28 00:56:28,229 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:56:28,229 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:56:28,229 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2024-06-28 00:56:28,229 INFO L420 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 00:56:28,229 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:56:28,229 INFO L85 PathProgramCache]: Analyzing trace with hash 1185887420, now seen corresponding path program 3 times [2024-06-28 00:56:28,229 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:56:28,229 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1722832998] [2024-06-28 00:56:28,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:56:28,229 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:56:28,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:56:28,317 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:56:28,317 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:56:28,317 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1722832998] [2024-06-28 00:56:28,317 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1722832998] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:56:28,317 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:56:28,317 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 00:56:28,317 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2028636841] [2024-06-28 00:56:28,318 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:56:28,318 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 00:56:28,318 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:56:28,318 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 00:56:28,318 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-28 00:56:28,345 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 45 [2024-06-28 00:56:28,346 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 232 places, 277 transitions, 4246 flow. Second operand has 7 states, 7 states have (on average 19.0) internal successors, (133), 7 states have internal predecessors, (133), 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) [2024-06-28 00:56:28,346 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:56:28,346 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 45 [2024-06-28 00:56:28,346 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:56:28,988 INFO L124 PetriNetUnfolderBase]: 2870/4654 cut-off events. [2024-06-28 00:56:28,988 INFO L125 PetriNetUnfolderBase]: For 139540/139540 co-relation queries the response was YES. [2024-06-28 00:56:29,023 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30365 conditions, 4654 events. 2870/4654 cut-off events. For 139540/139540 co-relation queries the response was YES. Maximal size of possible extension queue 297. Compared 29925 event pairs, 921 based on Foata normal form. 2/4638 useless extension candidates. Maximal degree in co-relation 30253. Up to 4138 conditions per place. [2024-06-28 00:56:29,043 INFO L140 encePairwiseOnDemand]: 36/45 looper letters, 265 selfloop transitions, 30 changer transitions 0/308 dead transitions. [2024-06-28 00:56:29,043 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 238 places, 308 transitions, 4952 flow [2024-06-28 00:56:29,044 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 00:56:29,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 00:56:29,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 192 transitions. [2024-06-28 00:56:29,048 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6095238095238096 [2024-06-28 00:56:29,048 INFO L175 Difference]: Start difference. First operand has 232 places, 277 transitions, 4246 flow. Second operand 7 states and 192 transitions. [2024-06-28 00:56:29,048 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 238 places, 308 transitions, 4952 flow [2024-06-28 00:56:29,481 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 232 places, 308 transitions, 4863 flow, removed 17 selfloop flow, removed 6 redundant places. [2024-06-28 00:56:29,486 INFO L231 Difference]: Finished difference. Result has 233 places, 279 transitions, 4268 flow [2024-06-28 00:56:29,487 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=4157, PETRI_DIFFERENCE_MINUEND_PLACES=226, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=277, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=247, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4268, PETRI_PLACES=233, PETRI_TRANSITIONS=279} [2024-06-28 00:56:29,487 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 184 predicate places. [2024-06-28 00:56:29,487 INFO L495 AbstractCegarLoop]: Abstraction has has 233 places, 279 transitions, 4268 flow [2024-06-28 00:56:29,487 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.0) internal successors, (133), 7 states have internal predecessors, (133), 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) [2024-06-28 00:56:29,487 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:56:29,488 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:56:29,488 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2024-06-28 00:56:29,488 INFO L420 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 00:56:29,488 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:56:29,488 INFO L85 PathProgramCache]: Analyzing trace with hash -973548896, now seen corresponding path program 4 times [2024-06-28 00:56:29,489 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:56:29,489 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [739209445] [2024-06-28 00:56:29,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:56:29,489 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:56:29,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:56:29,578 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:56:29,578 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:56:29,579 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [739209445] [2024-06-28 00:56:29,579 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [739209445] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:56:29,579 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:56:29,579 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 00:56:29,579 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1032606402] [2024-06-28 00:56:29,579 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:56:29,581 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 00:56:29,581 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:56:29,581 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 00:56:29,582 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-28 00:56:29,616 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 45 [2024-06-28 00:56:29,616 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 233 places, 279 transitions, 4268 flow. Second operand has 7 states, 7 states have (on average 19.0) internal successors, (133), 7 states have internal predecessors, (133), 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) [2024-06-28 00:56:29,616 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:56:29,616 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 45 [2024-06-28 00:56:29,616 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:56:30,343 INFO L124 PetriNetUnfolderBase]: 2947/4677 cut-off events. [2024-06-28 00:56:30,343 INFO L125 PetriNetUnfolderBase]: For 149050/149050 co-relation queries the response was YES. [2024-06-28 00:56:30,378 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31234 conditions, 4677 events. 2947/4677 cut-off events. For 149050/149050 co-relation queries the response was YES. Maximal size of possible extension queue 303. Compared 29388 event pairs, 459 based on Foata normal form. 2/4677 useless extension candidates. Maximal degree in co-relation 31121. Up to 4085 conditions per place. [2024-06-28 00:56:30,399 INFO L140 encePairwiseOnDemand]: 36/45 looper letters, 270 selfloop transitions, 33 changer transitions 0/316 dead transitions. [2024-06-28 00:56:30,399 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 240 places, 316 transitions, 5138 flow [2024-06-28 00:56:30,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 00:56:30,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 00:56:30,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 215 transitions. [2024-06-28 00:56:30,400 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5972222222222222 [2024-06-28 00:56:30,400 INFO L175 Difference]: Start difference. First operand has 233 places, 279 transitions, 4268 flow. Second operand 8 states and 215 transitions. [2024-06-28 00:56:30,400 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 240 places, 316 transitions, 5138 flow [2024-06-28 00:56:30,854 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 236 places, 316 transitions, 5054 flow, removed 19 selfloop flow, removed 4 redundant places. [2024-06-28 00:56:30,858 INFO L231 Difference]: Finished difference. Result has 237 places, 282 transitions, 4317 flow [2024-06-28 00:56:30,859 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=4184, PETRI_DIFFERENCE_MINUEND_PLACES=229, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=279, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=247, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4317, PETRI_PLACES=237, PETRI_TRANSITIONS=282} [2024-06-28 00:56:30,859 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 188 predicate places. [2024-06-28 00:56:30,859 INFO L495 AbstractCegarLoop]: Abstraction has has 237 places, 282 transitions, 4317 flow [2024-06-28 00:56:30,859 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.0) internal successors, (133), 7 states have internal predecessors, (133), 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) [2024-06-28 00:56:30,859 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:56:30,859 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:56:30,859 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2024-06-28 00:56:30,860 INFO L420 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 00:56:30,860 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:56:30,860 INFO L85 PathProgramCache]: Analyzing trace with hash -1220229186, now seen corresponding path program 1 times [2024-06-28 00:56:30,860 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:56:30,860 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1542601223] [2024-06-28 00:56:30,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:56:30,860 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:56:30,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:56:30,996 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:56:30,996 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:56:30,996 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1542601223] [2024-06-28 00:56:30,996 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1542601223] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:56:30,996 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:56:30,996 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-28 00:56:30,996 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [344592040] [2024-06-28 00:56:30,996 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:56:30,997 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-28 00:56:30,997 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:56:30,997 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-28 00:56:30,997 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-06-28 00:56:31,022 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 21 out of 45 [2024-06-28 00:56:31,023 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 237 places, 282 transitions, 4317 flow. Second operand has 5 states, 5 states have (on average 23.6) internal successors, (118), 5 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) [2024-06-28 00:56:31,023 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:56:31,023 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 21 of 45 [2024-06-28 00:56:31,023 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:56:32,110 INFO L292 olderBase$Statistics]: inserting event number 4 for the transition-marking pair ([196] L726-->L729: Formula: (= v_~__unbuffered_p0_EBX~0_1 v_~x~0_1) InVars {~x~0=v_~x~0_1} OutVars{~x~0=v_~x~0_1, ~__unbuffered_p0_EBX~0=v_~__unbuffered_p0_EBX~0_1} AuxVars[] AssignedVars[~__unbuffered_p0_EBX~0][193], [Black: 259#(and (= ~__unbuffered_cnt~0 0) (= 2 ~x~0) (= ~__unbuffered_p2_EAX~0 1) (= ~__unbuffered_p0_EAX~0 0) (= ~y~0 0) (= ~__unbuffered_p0_EBX~0 0)), Black: 518#(and (= ~x~0 0) (= ~__unbuffered_p0_EAX~0 1) (= ~__unbuffered_p0_EBX~0 0) (<= 1 ~__unbuffered_cnt~0) (= ~y~0 1) (= ~__unbuffered_p2_EAX~0 0)), 79#true, Black: 265#(and (= ~__unbuffered_cnt~0 0) (= ~__unbuffered_p0_EAX~0 0) (= ~__unbuffered_p0_EBX~0 0)), Black: 525#(and (= 2 ~x~0) (= 2 ~__unbuffered_p2_EAX~0) (= ~__unbuffered_p0_EAX~0 0) (= ~y~0 0) (= ~__unbuffered_p0_EBX~0 0) (<= 1 ~__unbuffered_cnt~0)), Black: 524#(and (= 2 ~x~0) (= ~__unbuffered_p0_EAX~0 0) (= ~y~0 0) (= ~__unbuffered_p0_EBX~0 0) (<= 1 ~__unbuffered_cnt~0)), Black: 266#(and (= ~__unbuffered_cnt~0 0) (= ~__unbuffered_p0_EAX~0 0) (= ~__unbuffered_p0_EBX~0 0) (= ~x~0 1)), Black: 267#(and (= ~__unbuffered_cnt~0 0) (= ~__unbuffered_p2_EAX~0 1) (= ~__unbuffered_p0_EAX~0 0) (= ~__unbuffered_p0_EBX~0 0) (= ~x~0 1)), 365#true, Black: 533#(and (= 2 ~x~0) (= 2 ~__unbuffered_p2_EAX~0) (= ~__unbuffered_p0_EAX~0 0) (= ~y~0 0) (= ~__unbuffered_p0_EBX~0 0) (<= 1 ~__unbuffered_cnt~0)), 445#true, Black: 277#(and (= ~__unbuffered_cnt~0 0) (= ~__unbuffered_p0_EAX~0 0) (= ~__unbuffered_p0_EBX~0 0) (= ~x~0 1) (= ~__unbuffered_p2_EAX~0 0)), Black: 276#(and (= ~__unbuffered_cnt~0 0) (= ~__unbuffered_p0_EAX~0 0) (= ~__unbuffered_p0_EBX~0 0) (= ~__unbuffered_p2_EAX~0 0)), Black: 541#(and (= 2 ~x~0) (= ~__unbuffered_p2_EAX~0 1) (= ~__unbuffered_p0_EAX~0 0) (= ~y~0 0) (= ~__unbuffered_p0_EBX~0 0) (<= 1 ~__unbuffered_cnt~0)), Black: 287#(and (= ~__unbuffered_cnt~0 0) (= ~__unbuffered_p0_EAX~0 0) (= ~__unbuffered_p0_EBX~0 0) (= ~__unbuffered_p2_EAX~0 0)), Black: 551#(and (= ~__unbuffered_p2_EAX~0 1) (= ~__unbuffered_p0_EAX~0 0) (= ~__unbuffered_p0_EBX~0 0) (= ~x~0 1) (<= 1 ~__unbuffered_cnt~0) (= ~y~0 1)), Black: 301#(and (= ~x~0 0) (= ~__unbuffered_p0_EAX~0 0) (= ~__unbuffered_p0_EBX~0 0) (<= 1 ~__unbuffered_cnt~0) (= ~y~0 1) (= ~__unbuffered_p2_EAX~0 0)), P0Thread1of1ForFork1InUse, 466#true, Black: 559#(and (= ~__unbuffered_p0_EAX~0 0) (= ~__unbuffered_p0_EBX~0 0) (= ~x~0 1) (<= 1 ~__unbuffered_cnt~0) (= ~y~0 1) (= ~__unbuffered_p2_EAX~0 0)), 382#true, Black: 308#(and (= ~__unbuffered_cnt~0 0) (= 2 ~x~0) (= 2 ~__unbuffered_p2_EAX~0) (= ~__unbuffered_p0_EAX~0 0) (= ~__unbuffered_p0_EBX~0 0) (= ~y~0 1)), P2Thread1of1ForFork2InUse, Black: 307#(and (= ~__unbuffered_cnt~0 0) (= 2 ~x~0) (= 2 ~__unbuffered_p2_EAX~0) (= ~__unbuffered_p0_EAX~0 0) (= ~__unbuffered_p0_EBX~0 0)), P1Thread1of1ForFork0InUse, Black: 59#(and (= ~__unbuffered_cnt~0 0) (= ~x~0 0) (= ~__unbuffered_p0_EAX~0 0) (= ~y~0 0) (= ~__unbuffered_p0_EBX~0 0) (= ~__unbuffered_p2_EAX~0 0)), Black: 571#(and (= ~__unbuffered_p0_EAX~0 0) (= ~__unbuffered_p0_EBX~0 0) (= ~x~0 1) (<= 1 ~__unbuffered_cnt~0) (= ~y~0 1) (= ~__unbuffered_p2_EAX~0 0)), Black: 317#(and (= ~__unbuffered_cnt~0 0) (= 2 ~x~0) (= ~__unbuffered_p2_EAX~0 1) (= ~__unbuffered_p0_EAX~0 0) (= ~__unbuffered_p0_EBX~0 0) (= ~y~0 1)), Black: 316#(and (= ~__unbuffered_cnt~0 0) (= 2 ~x~0) (= ~__unbuffered_p2_EAX~0 1) (= ~__unbuffered_p0_EAX~0 0) (= ~__unbuffered_p0_EBX~0 0)), 42#L749true, Black: 66#(and (= ~x~0 0) (= ~__unbuffered_p0_EAX~0 0) (= ~y~0 0) (= ~__unbuffered_p0_EBX~0 0) (<= 1 ~__unbuffered_cnt~0) (= ~__unbuffered_p2_EAX~0 0)), Black: 70#(and (= ~__unbuffered_cnt~0 0) (= ~__unbuffered_p0_EAX~0 0) (= ~y~0 0) (= ~__unbuffered_p0_EBX~0 0) (= ~__unbuffered_p2_EAX~0 0)), Black: 71#(and (= ~__unbuffered_cnt~0 0) (= ~__unbuffered_p0_EAX~0 0) (= ~y~0 0) (= ~__unbuffered_p0_EBX~0 0) (= ~x~0 1) (= ~__unbuffered_p2_EAX~0 0)), Black: 581#(and (= ~__unbuffered_p0_EAX~0 0) (= ~__unbuffered_p0_EBX~0 0) (= ~x~0 1) (<= 1 ~__unbuffered_cnt~0) (= ~y~0 1) (= ~__unbuffered_p2_EAX~0 0)), 166#true, Black: 328#(and (= ~__unbuffered_cnt~0 0) (= 2 ~x~0) (= ~__unbuffered_p2_EAX~0 1) (= ~__unbuffered_p0_EAX~0 0) (= ~__unbuffered_p0_EBX~0 0) (= ~y~0 1)), Black: 83#(and (= ~__unbuffered_cnt~0 0) (= ~__unbuffered_p0_EAX~0 0) (= ~y~0 0) (= ~__unbuffered_p0_EBX~0 0) (= ~__unbuffered_p2_EAX~0 0)), Black: 339#(and (= ~__unbuffered_cnt~0 0) (= 2 ~x~0) (= ~__unbuffered_p0_EAX~0 0) (= ~__unbuffered_p0_EBX~0 0) (= ~y~0 1) (= ~__unbuffered_p2_EAX~0 0)), Black: 84#(and (= ~__unbuffered_cnt~0 0) (= ~__unbuffered_p0_EAX~0 0) (= ~y~0 0) (= ~__unbuffered_p0_EBX~0 0) (= ~x~0 1) (= ~__unbuffered_p2_EAX~0 0)), 68#true, Black: 93#(and (= ~__unbuffered_cnt~0 0) (= ~__unbuffered_p0_EAX~0 0) (= ~y~0 0) (= ~x~0 1) (= ~__unbuffered_p2_EAX~0 0)), Black: 92#(and (= ~__unbuffered_cnt~0 0) (= ~__unbuffered_p0_EAX~0 0) (= ~y~0 0) (= ~__unbuffered_p2_EAX~0 0)), Black: 94#(and (= ~__unbuffered_cnt~0 0) (= ~__unbuffered_p0_EBX~0 1) (= ~__unbuffered_p0_EAX~0 0) (= ~y~0 0) (= ~x~0 1) (= ~__unbuffered_p2_EAX~0 0)), Black: 350#(and (= ~__unbuffered_cnt~0 0) (= 2 ~x~0) (= ~__unbuffered_p0_EAX~0 0) (= ~__unbuffered_p0_EBX~0 0) (= ~y~0 1) (= ~__unbuffered_p2_EAX~0 0)), Black: 102#(and (= 2 ~x~0) (= ~__unbuffered_p0_EAX~0 0) (= ~y~0 0) (= ~__unbuffered_p0_EBX~0 0) (<= 1 ~__unbuffered_cnt~0) (= ~__unbuffered_p2_EAX~0 0)), Black: 360#(and (= ~__unbuffered_cnt~0 0) (= ~__unbuffered_p2_EAX~0 1) (= ~__unbuffered_p0_EAX~0 0) (= ~y~0 0) (= ~__unbuffered_p0_EBX~0 0) (= ~x~0 1)), Black: 358#(and (= ~__unbuffered_cnt~0 0) (= ~__unbuffered_p0_EAX~0 0) (= ~y~0 0) (= ~__unbuffered_p0_EBX~0 0)), Black: 109#(and (= ~__unbuffered_cnt~0 0) (= 2 ~x~0) (= ~__unbuffered_p0_EAX~0 0) (= ~y~0 0) (= ~__unbuffered_p0_EBX~0 0) (= ~__unbuffered_p2_EAX~0 0)), Black: 368#(and (= ~__unbuffered_cnt~0 0) (= ~__unbuffered_p0_EAX~0 0) (= ~y~0 0)), Black: 371#(and (= ~__unbuffered_cnt~0 0) (= ~__unbuffered_p0_EBX~0 1) (= ~__unbuffered_p2_EAX~0 1) (= ~__unbuffered_p0_EAX~0 0) (= ~y~0 0) (= ~x~0 1)), Black: 118#(and (= ~__unbuffered_cnt~0 0) (= 2 ~x~0) (= ~__unbuffered_p0_EAX~0 0) (= ~y~0 0) (= ~__unbuffered_p0_EBX~0 2) (= ~__unbuffered_p2_EAX~0 0)), Black: 380#(and (= ~__unbuffered_cnt~0 0) (= ~__unbuffered_p0_EBX~0 1) (= ~__unbuffered_p2_EAX~0 1) (= ~__unbuffered_p0_EAX~0 0) (= ~y~0 0) (= ~x~0 1)), 520#true, Black: 126#(and (= ~__unbuffered_cnt~0 0) (= 2 ~x~0) (= ~__unbuffered_p0_EBX~0 1) (= ~__unbuffered_p0_EAX~0 0) (= ~y~0 0) (= ~__unbuffered_p2_EAX~0 0)), Black: 133#(and (= ~__unbuffered_cnt~0 0) (= ~x~0 0) (= ~__unbuffered_p0_EAX~0 0) (= ~__unbuffered_p0_EBX~0 0) (= ~__unbuffered_p2_EAX~0 0)), Black: 134#(and (= ~__unbuffered_cnt~0 0) (= ~x~0 0) (= ~__unbuffered_p0_EAX~0 0) (= ~__unbuffered_p0_EBX~0 0) (= ~y~0 1) (= ~__unbuffered_p2_EAX~0 0)), Black: 385#(and (= ~__unbuffered_cnt~0 0) (= ~__unbuffered_p0_EAX~0 0) (= ~__unbuffered_p0_EBX~0 0)), Black: 388#(and (= ~__unbuffered_cnt~0 0) (= ~__unbuffered_p2_EAX~0 1) (= ~__unbuffered_p0_EAX~0 0) (= ~__unbuffered_p0_EBX~0 0) (= ~x~0 1) (= ~y~0 1)), Black: 143#(and (= ~__unbuffered_p0_EAX~0 0) (= ~y~0 0) (= ~__unbuffered_p0_EBX~0 0) (= ~x~0 1) (<= 1 ~__unbuffered_cnt~0) (= ~__unbuffered_p2_EAX~0 0)), Black: 142#(and (= ~__unbuffered_p0_EAX~0 0) (= ~y~0 0) (= ~__unbuffered_p0_EBX~0 0) (<= 1 ~__unbuffered_cnt~0) (= ~__unbuffered_p2_EAX~0 0)), Black: 403#(and (= ~__unbuffered_cnt~0 0) (= ~__unbuffered_p0_EAX~0 0) (= ~__unbuffered_p0_EBX~0 0) (= ~x~0 1) (= ~y~0 1) (= ~__unbuffered_p2_EAX~0 0)), Black: 402#(and (= ~__unbuffered_cnt~0 0) (= ~__unbuffered_p0_EAX~0 0) (= ~__unbuffered_p0_EBX~0 0) (= ~y~0 1) (= ~__unbuffered_p2_EAX~0 0)), 354#true, Black: 401#(and (= ~__unbuffered_cnt~0 0) (= ~__unbuffered_p0_EAX~0 0) (= ~__unbuffered_p0_EBX~0 0) (= ~__unbuffered_p2_EAX~0 0)), 48#L759true, Black: 154#(and (= ~__unbuffered_p0_EAX~0 0) (= ~y~0 0) (= ~__unbuffered_p0_EBX~0 0) (= ~x~0 1) (<= 1 ~__unbuffered_cnt~0) (= ~__unbuffered_p2_EAX~0 0)), 575#true, Black: 164#(and (= ~__unbuffered_p0_EBX~0 1) (= ~__unbuffered_p0_EAX~0 0) (= ~y~0 0) (= ~x~0 1) (<= 1 ~__unbuffered_cnt~0) (= ~__unbuffered_p2_EAX~0 0)), Black: 417#(and (= ~__unbuffered_cnt~0 0) (= ~__unbuffered_p0_EAX~0 0) (= ~__unbuffered_p0_EBX~0 0) (= ~x~0 1) (= ~y~0 1) (= ~__unbuffered_p2_EAX~0 0)), 16#L18-2true, Black: 170#(and (= ~__unbuffered_cnt~0 0) (= ~__unbuffered_p2_EAX~0 1) (= ~__unbuffered_p0_EAX~0 0) (= ~y~0 0) (= ~__unbuffered_p0_EBX~0 0) (= ~x~0 1)), Black: 169#(and (= ~__unbuffered_cnt~0 0) (= ~__unbuffered_p0_EAX~0 0) (= ~y~0 0) (= ~__unbuffered_p0_EBX~0 0) (= ~x~0 1)), Black: 168#(and (= ~__unbuffered_cnt~0 0) (= ~__unbuffered_p0_EAX~0 0) (= ~y~0 0) (= ~__unbuffered_p0_EBX~0 0)), Black: 428#(and (= ~__unbuffered_cnt~0 0) (= ~__unbuffered_p0_EAX~0 0) (= ~y~0 0) (= ~__unbuffered_p2_EAX~0 0)), Black: 430#(and (= ~__unbuffered_cnt~0 0) (= ~__unbuffered_p0_EBX~0 1) (= ~__unbuffered_p0_EAX~0 0) (= ~y~0 0) (= 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~__unbuffered_p2_EAX~0 0))]) [2024-06-28 00:56:32,110 INFO L294 olderBase$Statistics]: this new event has 28 ancestors and is not cut-off event [2024-06-28 00:56:32,110 INFO L297 olderBase$Statistics]: existing Event has 28 ancestors and is not cut-off event [2024-06-28 00:56:32,111 INFO L297 olderBase$Statistics]: existing Event has 28 ancestors and is not cut-off event [2024-06-28 00:56:32,111 INFO L297 olderBase$Statistics]: existing Event has 28 ancestors and is not cut-off event [2024-06-28 00:56:32,156 INFO L292 olderBase$Statistics]: inserting event number 4 for the transition-marking pair ([196] L726-->L729: Formula: (= v_~__unbuffered_p0_EBX~0_1 v_~x~0_1) InVars {~x~0=v_~x~0_1} OutVars{~x~0=v_~x~0_1, ~__unbuffered_p0_EBX~0=v_~__unbuffered_p0_EBX~0_1} AuxVars[] AssignedVars[~__unbuffered_p0_EBX~0][193], [Black: 259#(and (= ~__unbuffered_cnt~0 0) (= 2 ~x~0) (= ~__unbuffered_p2_EAX~0 1) (= ~__unbuffered_p0_EAX~0 0) (= ~y~0 0) (= ~__unbuffered_p0_EBX~0 0)), Black: 518#(and (= ~x~0 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~__unbuffered_p2_EAX~0 0)), Black: 498#(and (= ~__unbuffered_cnt~0 0) (= ~__unbuffered_p0_EAX~0 1) (= ~__unbuffered_p0_EBX~0 0) (= ~x~0 1) (= ~y~0 1) (= ~__unbuffered_p2_EAX~0 0)), Black: 252#(and (= ~__unbuffered_cnt~0 0) (= 2 ~x~0) (= 2 ~__unbuffered_p2_EAX~0) (= ~__unbuffered_p0_EAX~0 0) (= ~y~0 0) (= ~__unbuffered_p0_EBX~0 0)), Black: 510#(and (= ~x~0 0) (= ~__unbuffered_p0_EAX~0 1) (= ~__unbuffered_p0_EBX~0 0) (<= 1 ~__unbuffered_cnt~0) (= ~y~0 1) (= ~__unbuffered_p2_EAX~0 0))]) [2024-06-28 00:56:32,156 INFO L294 olderBase$Statistics]: this new event has 30 ancestors and is cut-off event [2024-06-28 00:56:32,156 INFO L297 olderBase$Statistics]: existing Event has 30 ancestors and is cut-off event [2024-06-28 00:56:32,156 INFO L297 olderBase$Statistics]: existing Event has 30 ancestors and is cut-off event [2024-06-28 00:56:32,156 INFO L297 olderBase$Statistics]: existing Event has 30 ancestors and is cut-off event [2024-06-28 00:56:32,212 INFO L124 PetriNetUnfolderBase]: 4590/8129 cut-off events. [2024-06-28 00:56:32,213 INFO L125 PetriNetUnfolderBase]: For 230622/231278 co-relation queries the response was YES. [2024-06-28 00:56:32,285 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50384 conditions, 8129 events. 4590/8129 cut-off events. For 230622/231278 co-relation queries the response was YES. Maximal size of possible extension queue 610. Compared 63415 event pairs, 980 based on Foata normal form. 442/8126 useless extension candidates. Maximal degree in co-relation 50270. Up to 2703 conditions per place. [2024-06-28 00:56:32,320 INFO L140 encePairwiseOnDemand]: 36/45 looper letters, 192 selfloop transitions, 218 changer transitions 66/609 dead transitions. [2024-06-28 00:56:32,320 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 243 places, 609 transitions, 9901 flow [2024-06-28 00:56:32,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 00:56:32,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 00:56:32,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 223 transitions. [2024-06-28 00:56:32,321 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.707936507936508 [2024-06-28 00:56:32,321 INFO L175 Difference]: Start difference. First operand has 237 places, 282 transitions, 4317 flow. Second operand 7 states and 223 transitions. [2024-06-28 00:56:32,321 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 243 places, 609 transitions, 9901 flow [2024-06-28 00:56:33,060 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 239 places, 609 transitions, 9708 flow, removed 63 selfloop flow, removed 4 redundant places. [2024-06-28 00:56:33,067 INFO L231 Difference]: Finished difference. Result has 245 places, 424 transitions, 7450 flow [2024-06-28 00:56:33,067 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=4243, PETRI_DIFFERENCE_MINUEND_PLACES=233, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=282, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=76, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=193, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=7450, PETRI_PLACES=245, PETRI_TRANSITIONS=424} [2024-06-28 00:56:33,068 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 196 predicate places. [2024-06-28 00:56:33,068 INFO L495 AbstractCegarLoop]: Abstraction has has 245 places, 424 transitions, 7450 flow [2024-06-28 00:56:33,068 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 23.6) internal successors, (118), 5 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) [2024-06-28 00:56:33,068 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:56:33,068 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:56:33,068 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2024-06-28 00:56:33,068 INFO L420 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 00:56:33,068 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:56:33,068 INFO L85 PathProgramCache]: Analyzing trace with hash 2053788724, now seen corresponding path program 1 times [2024-06-28 00:56:33,068 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:56:33,068 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1051939205] [2024-06-28 00:56:33,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:56:33,069 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:56:33,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:56:33,329 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:56:33,329 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:56:33,329 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1051939205] [2024-06-28 00:56:33,330 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1051939205] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:56:33,330 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:56:33,330 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 00:56:33,330 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [146123897] [2024-06-28 00:56:33,330 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:56:33,330 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 00:56:33,330 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:56:33,331 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 00:56:33,331 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-28 00:56:33,389 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 45 [2024-06-28 00:56:33,389 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 245 places, 424 transitions, 7450 flow. Second operand has 9 states, 9 states have (on average 16.77777777777778) internal successors, (151), 9 states have internal predecessors, (151), 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) [2024-06-28 00:56:33,389 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:56:33,389 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 45 [2024-06-28 00:56:33,389 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:56:35,070 INFO L124 PetriNetUnfolderBase]: 6514/10664 cut-off events. [2024-06-28 00:56:35,070 INFO L125 PetriNetUnfolderBase]: For 330357/330554 co-relation queries the response was YES. [2024-06-28 00:56:35,163 INFO L83 FinitePrefix]: Finished finitePrefix Result has 73857 conditions, 10664 events. 6514/10664 cut-off events. For 330357/330554 co-relation queries the response was YES. Maximal size of possible extension queue 601. Compared 76029 event pairs, 1109 based on Foata normal form. 129/10662 useless extension candidates. Maximal degree in co-relation 73735. Up to 8338 conditions per place. [2024-06-28 00:56:35,208 INFO L140 encePairwiseOnDemand]: 33/45 looper letters, 334 selfloop transitions, 68 changer transitions 104/518 dead transitions. [2024-06-28 00:56:35,208 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 253 places, 518 transitions, 9313 flow [2024-06-28 00:56:35,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 00:56:35,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 00:56:35,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 238 transitions. [2024-06-28 00:56:35,209 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5876543209876544 [2024-06-28 00:56:35,209 INFO L175 Difference]: Start difference. First operand has 245 places, 424 transitions, 7450 flow. Second operand 9 states and 238 transitions. [2024-06-28 00:56:35,209 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 253 places, 518 transitions, 9313 flow [2024-06-28 00:56:37,257 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 253 places, 518 transitions, 9297 flow, removed 8 selfloop flow, removed 0 redundant places. [2024-06-28 00:56:37,263 INFO L231 Difference]: Finished difference. Result has 258 places, 359 transitions, 6240 flow [2024-06-28 00:56:37,263 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=7438, PETRI_DIFFERENCE_MINUEND_PLACES=245, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=424, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=367, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6240, PETRI_PLACES=258, PETRI_TRANSITIONS=359} [2024-06-28 00:56:37,263 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 209 predicate places. [2024-06-28 00:56:37,263 INFO L495 AbstractCegarLoop]: Abstraction has has 258 places, 359 transitions, 6240 flow [2024-06-28 00:56:37,264 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 16.77777777777778) internal successors, (151), 9 states have internal predecessors, (151), 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) [2024-06-28 00:56:37,264 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:56:37,264 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:56:37,264 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2024-06-28 00:56:37,264 INFO L420 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 00:56:37,264 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:56:37,264 INFO L85 PathProgramCache]: Analyzing trace with hash 1217762660, now seen corresponding path program 2 times [2024-06-28 00:56:37,264 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:56:37,265 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [846804591] [2024-06-28 00:56:37,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:56:37,265 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:56:37,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:56:37,393 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:56:37,393 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:56:37,393 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [846804591] [2024-06-28 00:56:37,393 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [846804591] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:56:37,394 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:56:37,394 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 00:56:37,394 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1301342142] [2024-06-28 00:56:37,394 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:56:37,394 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 00:56:37,394 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:56:37,394 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 00:56:37,395 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-28 00:56:37,444 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 45 [2024-06-28 00:56:37,444 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 258 places, 359 transitions, 6240 flow. Second operand has 8 states, 8 states have (on average 18.875) internal successors, (151), 8 states have internal predecessors, (151), 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) [2024-06-28 00:56:37,444 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:56:37,444 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 45 [2024-06-28 00:56:37,445 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:56:38,897 INFO L124 PetriNetUnfolderBase]: 5053/8332 cut-off events. [2024-06-28 00:56:38,897 INFO L125 PetriNetUnfolderBase]: For 312528/312712 co-relation queries the response was YES. [2024-06-28 00:56:39,051 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61427 conditions, 8332 events. 5053/8332 cut-off events. For 312528/312712 co-relation queries the response was YES. Maximal size of possible extension queue 528. Compared 58815 event pairs, 895 based on Foata normal form. 140/8277 useless extension candidates. Maximal degree in co-relation 61298. Up to 6519 conditions per place. [2024-06-28 00:56:39,085 INFO L140 encePairwiseOnDemand]: 37/45 looper letters, 312 selfloop transitions, 61 changer transitions 7/395 dead transitions. [2024-06-28 00:56:39,085 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 262 places, 395 transitions, 7336 flow [2024-06-28 00:56:39,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 00:56:39,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 00:56:39,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 196 transitions. [2024-06-28 00:56:39,089 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6222222222222222 [2024-06-28 00:56:39,089 INFO L175 Difference]: Start difference. First operand has 258 places, 359 transitions, 6240 flow. Second operand 7 states and 196 transitions. [2024-06-28 00:56:39,089 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 262 places, 395 transitions, 7336 flow [2024-06-28 00:56:39,980 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 261 places, 395 transitions, 7240 flow, removed 47 selfloop flow, removed 1 redundant places. [2024-06-28 00:56:39,986 INFO L231 Difference]: Finished difference. Result has 262 places, 354 transitions, 6229 flow [2024-06-28 00:56:39,986 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=6148, PETRI_DIFFERENCE_MINUEND_PLACES=255, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=359, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=59, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=300, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6229, PETRI_PLACES=262, PETRI_TRANSITIONS=354} [2024-06-28 00:56:39,986 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 213 predicate places. [2024-06-28 00:56:39,986 INFO L495 AbstractCegarLoop]: Abstraction has has 262 places, 354 transitions, 6229 flow [2024-06-28 00:56:39,986 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.875) internal successors, (151), 8 states have internal predecessors, (151), 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) [2024-06-28 00:56:39,987 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:56:39,987 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:56:39,987 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2024-06-28 00:56:39,987 INFO L420 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 00:56:39,987 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:56:39,987 INFO L85 PathProgramCache]: Analyzing trace with hash -1742623000, now seen corresponding path program 3 times [2024-06-28 00:56:39,987 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:56:39,988 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2018801372] [2024-06-28 00:56:39,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:56:39,988 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:56:39,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:56:40,164 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:56:40,165 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:56:40,165 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2018801372] [2024-06-28 00:56:40,165 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2018801372] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:56:40,165 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:56:40,165 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 00:56:40,165 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [864664169] [2024-06-28 00:56:40,165 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:56:40,165 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 00:56:40,168 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:56:40,168 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 00:56:40,168 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-28 00:56:40,223 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 45 [2024-06-28 00:56:40,223 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 262 places, 354 transitions, 6229 flow. Second operand has 8 states, 8 states have (on average 18.875) internal successors, (151), 8 states have internal predecessors, (151), 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) [2024-06-28 00:56:40,223 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:56:40,223 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 45 [2024-06-28 00:56:40,223 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:56:41,771 INFO L124 PetriNetUnfolderBase]: 5020/8294 cut-off events. [2024-06-28 00:56:41,771 INFO L125 PetriNetUnfolderBase]: For 312688/312865 co-relation queries the response was YES. [2024-06-28 00:56:41,841 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60940 conditions, 8294 events. 5020/8294 cut-off events. For 312688/312865 co-relation queries the response was YES. Maximal size of possible extension queue 524. Compared 58680 event pairs, 841 based on Foata normal form. 146/8246 useless extension candidates. Maximal degree in co-relation 60809. Up to 6495 conditions per place. [2024-06-28 00:56:41,967 INFO L140 encePairwiseOnDemand]: 38/45 looper letters, 310 selfloop transitions, 58 changer transitions 0/383 dead transitions. [2024-06-28 00:56:41,967 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 267 places, 383 transitions, 7137 flow [2024-06-28 00:56:41,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-28 00:56:41,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-28 00:56:41,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 172 transitions. [2024-06-28 00:56:41,980 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6370370370370371 [2024-06-28 00:56:41,980 INFO L175 Difference]: Start difference. First operand has 262 places, 354 transitions, 6229 flow. Second operand 6 states and 172 transitions. [2024-06-28 00:56:41,980 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 267 places, 383 transitions, 7137 flow [2024-06-28 00:56:43,368 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 263 places, 383 transitions, 7001 flow, removed 28 selfloop flow, removed 4 redundant places. [2024-06-28 00:56:43,373 INFO L231 Difference]: Finished difference. Result has 264 places, 354 transitions, 6221 flow [2024-06-28 00:56:43,373 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=6093, PETRI_DIFFERENCE_MINUEND_PLACES=258, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=354, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=58, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=296, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=6221, PETRI_PLACES=264, PETRI_TRANSITIONS=354} [2024-06-28 00:56:43,374 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 215 predicate places. [2024-06-28 00:56:43,374 INFO L495 AbstractCegarLoop]: Abstraction has has 264 places, 354 transitions, 6221 flow [2024-06-28 00:56:43,374 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.875) internal successors, (151), 8 states have internal predecessors, (151), 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) [2024-06-28 00:56:43,374 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:56:43,374 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:56:43,374 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2024-06-28 00:56:43,374 INFO L420 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 00:56:43,374 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:56:43,374 INFO L85 PathProgramCache]: Analyzing trace with hash 868140980, now seen corresponding path program 1 times [2024-06-28 00:56:43,374 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:56:43,374 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1752567371] [2024-06-28 00:56:43,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:56:43,374 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:56:43,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:56:43,479 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:56:43,479 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:56:43,479 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1752567371] [2024-06-28 00:56:43,480 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1752567371] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:56:43,480 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:56:43,480 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 00:56:43,480 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1368347829] [2024-06-28 00:56:43,480 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:56:43,480 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 00:56:43,480 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:56:43,481 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 00:56:43,481 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-28 00:56:43,509 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 45 [2024-06-28 00:56:43,509 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 264 places, 354 transitions, 6221 flow. Second operand has 7 states, 7 states have (on average 19.142857142857142) internal successors, (134), 7 states have internal predecessors, (134), 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) [2024-06-28 00:56:43,509 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:56:43,509 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 45 [2024-06-28 00:56:43,510 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:56:45,119 INFO L124 PetriNetUnfolderBase]: 5012/8318 cut-off events. [2024-06-28 00:56:45,119 INFO L125 PetriNetUnfolderBase]: For 294816/294981 co-relation queries the response was YES. [2024-06-28 00:56:45,184 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60543 conditions, 8318 events. 5012/8318 cut-off events. For 294816/294981 co-relation queries the response was YES. Maximal size of possible extension queue 528. Compared 59236 event pairs, 1210 based on Foata normal form. 117/8239 useless extension candidates. Maximal degree in co-relation 60412. Up to 7102 conditions per place. [2024-06-28 00:56:45,223 INFO L140 encePairwiseOnDemand]: 36/45 looper letters, 279 selfloop transitions, 87 changer transitions 0/381 dead transitions. [2024-06-28 00:56:45,223 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 269 places, 381 transitions, 7185 flow [2024-06-28 00:56:45,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-28 00:56:45,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-28 00:56:45,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 175 transitions. [2024-06-28 00:56:45,224 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6481481481481481 [2024-06-28 00:56:45,224 INFO L175 Difference]: Start difference. First operand has 264 places, 354 transitions, 6221 flow. Second operand 6 states and 175 transitions. [2024-06-28 00:56:45,224 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 269 places, 381 transitions, 7185 flow [2024-06-28 00:56:46,278 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 264 places, 381 transitions, 7046 flow, removed 14 selfloop flow, removed 5 redundant places. [2024-06-28 00:56:46,283 INFO L231 Difference]: Finished difference. Result has 265 places, 357 transitions, 6324 flow [2024-06-28 00:56:46,283 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=6084, PETRI_DIFFERENCE_MINUEND_PLACES=259, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=354, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=84, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=270, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=6324, PETRI_PLACES=265, PETRI_TRANSITIONS=357} [2024-06-28 00:56:46,284 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 216 predicate places. [2024-06-28 00:56:46,284 INFO L495 AbstractCegarLoop]: Abstraction has has 265 places, 357 transitions, 6324 flow [2024-06-28 00:56:46,284 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.142857142857142) internal successors, (134), 7 states have internal predecessors, (134), 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) [2024-06-28 00:56:46,284 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:56:46,284 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:56:46,284 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2024-06-28 00:56:46,284 INFO L420 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 00:56:46,284 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:56:46,285 INFO L85 PathProgramCache]: Analyzing trace with hash 1433684776, now seen corresponding path program 1 times [2024-06-28 00:56:46,285 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:56:46,285 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [43598822] [2024-06-28 00:56:46,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:56:46,285 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:56:46,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:56:46,479 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:56:46,479 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:56:46,479 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [43598822] [2024-06-28 00:56:46,480 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [43598822] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:56:46,480 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:56:46,480 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 00:56:46,480 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [489756944] [2024-06-28 00:56:46,480 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:56:46,480 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 00:56:46,480 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:56:46,481 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 00:56:46,481 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-28 00:56:46,545 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 45 [2024-06-28 00:56:46,545 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 265 places, 357 transitions, 6324 flow. Second operand has 8 states, 8 states have (on average 18.875) internal successors, (151), 8 states have internal predecessors, (151), 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) [2024-06-28 00:56:46,545 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:56:46,545 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 45 [2024-06-28 00:56:46,545 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:56:48,118 INFO L124 PetriNetUnfolderBase]: 4994/8488 cut-off events. [2024-06-28 00:56:48,119 INFO L125 PetriNetUnfolderBase]: For 297860/298084 co-relation queries the response was YES. [2024-06-28 00:56:48,196 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60285 conditions, 8488 events. 4994/8488 cut-off events. For 297860/298084 co-relation queries the response was YES. Maximal size of possible extension queue 539. Compared 61993 event pairs, 1282 based on Foata normal form. 140/8394 useless extension candidates. Maximal degree in co-relation 60154. Up to 6876 conditions per place. [2024-06-28 00:56:48,243 INFO L140 encePairwiseOnDemand]: 34/45 looper letters, 255 selfloop transitions, 139 changer transitions 1/410 dead transitions. [2024-06-28 00:56:48,244 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 272 places, 410 transitions, 7745 flow [2024-06-28 00:56:48,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 00:56:48,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 00:56:48,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 227 transitions. [2024-06-28 00:56:48,245 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6305555555555555 [2024-06-28 00:56:48,245 INFO L175 Difference]: Start difference. First operand has 265 places, 357 transitions, 6324 flow. Second operand 8 states and 227 transitions. [2024-06-28 00:56:48,245 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 272 places, 410 transitions, 7745 flow [2024-06-28 00:56:49,603 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 267 places, 410 transitions, 7522 flow, removed 13 selfloop flow, removed 5 redundant places. [2024-06-28 00:56:49,608 INFO L231 Difference]: Finished difference. Result has 270 places, 377 transitions, 6901 flow [2024-06-28 00:56:49,609 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=6126, PETRI_DIFFERENCE_MINUEND_PLACES=260, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=357, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=120, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=220, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6901, PETRI_PLACES=270, PETRI_TRANSITIONS=377} [2024-06-28 00:56:49,609 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 221 predicate places. [2024-06-28 00:56:49,609 INFO L495 AbstractCegarLoop]: Abstraction has has 270 places, 377 transitions, 6901 flow [2024-06-28 00:56:49,609 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.875) internal successors, (151), 8 states have internal predecessors, (151), 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) [2024-06-28 00:56:49,609 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:56:49,609 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:56:49,610 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2024-06-28 00:56:49,610 INFO L420 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 00:56:49,610 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:56:49,610 INFO L85 PathProgramCache]: Analyzing trace with hash 1433684590, now seen corresponding path program 2 times [2024-06-28 00:56:49,610 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:56:49,610 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1513775119] [2024-06-28 00:56:49,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:56:49,610 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:56:49,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:56:49,720 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:56:49,720 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:56:49,720 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1513775119] [2024-06-28 00:56:49,720 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1513775119] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:56:49,720 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:56:49,720 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 00:56:49,720 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2115719926] [2024-06-28 00:56:49,720 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:56:49,721 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 00:56:49,721 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:56:49,721 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 00:56:49,721 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-28 00:56:49,752 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 45 [2024-06-28 00:56:49,753 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 270 places, 377 transitions, 6901 flow. Second operand has 8 states, 8 states have (on average 18.875) internal successors, (151), 8 states have internal predecessors, (151), 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) [2024-06-28 00:56:49,753 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:56:49,753 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 45 [2024-06-28 00:56:49,753 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:56:51,404 INFO L124 PetriNetUnfolderBase]: 5113/8467 cut-off events. [2024-06-28 00:56:51,404 INFO L125 PetriNetUnfolderBase]: For 305391/305622 co-relation queries the response was YES. [2024-06-28 00:56:51,471 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62886 conditions, 8467 events. 5113/8467 cut-off events. For 305391/305622 co-relation queries the response was YES. Maximal size of possible extension queue 534. Compared 60302 event pairs, 1223 based on Foata normal form. 138/8398 useless extension candidates. Maximal degree in co-relation 62753. Up to 7231 conditions per place. [2024-06-28 00:56:51,508 INFO L140 encePairwiseOnDemand]: 36/45 looper letters, 291 selfloop transitions, 97 changer transitions 0/403 dead transitions. [2024-06-28 00:56:51,509 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 276 places, 403 transitions, 7763 flow [2024-06-28 00:56:51,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 00:56:51,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 00:56:51,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 199 transitions. [2024-06-28 00:56:51,510 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6317460317460317 [2024-06-28 00:56:51,510 INFO L175 Difference]: Start difference. First operand has 270 places, 377 transitions, 6901 flow. Second operand 7 states and 199 transitions. [2024-06-28 00:56:51,510 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 276 places, 403 transitions, 7763 flow [2024-06-28 00:56:52,674 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 272 places, 403 transitions, 7585 flow, removed 35 selfloop flow, removed 4 redundant places. [2024-06-28 00:56:52,679 INFO L231 Difference]: Finished difference. Result has 273 places, 377 transitions, 6933 flow [2024-06-28 00:56:52,679 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=6723, PETRI_DIFFERENCE_MINUEND_PLACES=266, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=377, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=97, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=280, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6933, PETRI_PLACES=273, PETRI_TRANSITIONS=377} [2024-06-28 00:56:52,680 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 224 predicate places. [2024-06-28 00:56:52,680 INFO L495 AbstractCegarLoop]: Abstraction has has 273 places, 377 transitions, 6933 flow [2024-06-28 00:56:52,680 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.875) internal successors, (151), 8 states have internal predecessors, (151), 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) [2024-06-28 00:56:52,680 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:56:52,680 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:56:52,680 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2024-06-28 00:56:52,680 INFO L420 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 00:56:52,680 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:56:52,681 INFO L85 PathProgramCache]: Analyzing trace with hash 328858984, now seen corresponding path program 3 times [2024-06-28 00:56:52,681 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:56:52,681 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2143933297] [2024-06-28 00:56:52,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:56:52,681 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:56:52,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:56:52,790 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:56:52,790 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:56:52,790 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2143933297] [2024-06-28 00:56:52,790 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2143933297] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:56:52,790 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:56:52,790 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 00:56:52,790 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1281823638] [2024-06-28 00:56:52,791 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:56:52,791 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 00:56:52,791 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:56:52,791 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 00:56:52,791 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2024-06-28 00:56:52,823 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 45 [2024-06-28 00:56:52,824 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 273 places, 377 transitions, 6933 flow. Second operand has 8 states, 8 states have (on average 18.875) internal successors, (151), 8 states have internal predecessors, (151), 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) [2024-06-28 00:56:52,824 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:56:52,824 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 45 [2024-06-28 00:56:52,824 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:56:54,569 INFO L124 PetriNetUnfolderBase]: 5127/8473 cut-off events. [2024-06-28 00:56:54,570 INFO L125 PetriNetUnfolderBase]: For 318401/318652 co-relation queries the response was YES. [2024-06-28 00:56:54,644 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63419 conditions, 8473 events. 5127/8473 cut-off events. For 318401/318652 co-relation queries the response was YES. Maximal size of possible extension queue 540. Compared 60451 event pairs, 1258 based on Foata normal form. 148/8386 useless extension candidates. Maximal degree in co-relation 63284. Up to 7048 conditions per place. [2024-06-28 00:56:54,683 INFO L140 encePairwiseOnDemand]: 36/45 looper letters, 290 selfloop transitions, 112 changer transitions 0/417 dead transitions. [2024-06-28 00:56:54,683 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 279 places, 417 transitions, 8210 flow [2024-06-28 00:56:54,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 00:56:54,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 00:56:54,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 200 transitions. [2024-06-28 00:56:54,684 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6349206349206349 [2024-06-28 00:56:54,684 INFO L175 Difference]: Start difference. First operand has 273 places, 377 transitions, 6933 flow. Second operand 7 states and 200 transitions. [2024-06-28 00:56:54,684 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 279 places, 417 transitions, 8210 flow [2024-06-28 00:56:55,870 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 272 places, 417 transitions, 7954 flow, removed 9 selfloop flow, removed 7 redundant places. [2024-06-28 00:56:55,876 INFO L231 Difference]: Finished difference. Result has 273 places, 386 transitions, 7076 flow [2024-06-28 00:56:55,876 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=6681, PETRI_DIFFERENCE_MINUEND_PLACES=266, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=377, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=103, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=274, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=7076, PETRI_PLACES=273, PETRI_TRANSITIONS=386} [2024-06-28 00:56:55,876 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 224 predicate places. [2024-06-28 00:56:55,876 INFO L495 AbstractCegarLoop]: Abstraction has has 273 places, 386 transitions, 7076 flow [2024-06-28 00:56:55,877 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.875) internal successors, (151), 8 states have internal predecessors, (151), 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) [2024-06-28 00:56:55,877 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:56:55,877 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:56:55,877 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2024-06-28 00:56:55,877 INFO L420 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 00:56:55,877 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:56:55,877 INFO L85 PathProgramCache]: Analyzing trace with hash 387247690, now seen corresponding path program 2 times [2024-06-28 00:56:55,877 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:56:55,877 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [613465451] [2024-06-28 00:56:55,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:56:55,878 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:56:55,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:56:55,978 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:56:55,978 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:56:55,978 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [613465451] [2024-06-28 00:56:55,978 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [613465451] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:56:55,978 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:56:55,979 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 00:56:55,980 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [688233714] [2024-06-28 00:56:55,980 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:56:55,980 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 00:56:55,981 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:56:55,981 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 00:56:55,981 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-28 00:56:56,037 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 45 [2024-06-28 00:56:56,037 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 273 places, 386 transitions, 7076 flow. Second operand has 8 states, 8 states have (on average 18.875) internal successors, (151), 8 states have internal predecessors, (151), 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) [2024-06-28 00:56:56,037 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:56:56,037 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 45 [2024-06-28 00:56:56,038 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:56:57,556 INFO L124 PetriNetUnfolderBase]: 5158/8545 cut-off events. [2024-06-28 00:56:57,556 INFO L125 PetriNetUnfolderBase]: For 321839/322039 co-relation queries the response was YES. [2024-06-28 00:56:57,629 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64152 conditions, 8545 events. 5158/8545 cut-off events. For 321839/322039 co-relation queries the response was YES. Maximal size of possible extension queue 547. Compared 61260 event pairs, 1259 based on Foata normal form. 157/8474 useless extension candidates. Maximal degree in co-relation 64017. Up to 6668 conditions per place. [2024-06-28 00:56:57,842 INFO L140 encePairwiseOnDemand]: 34/45 looper letters, 218 selfloop transitions, 200 changer transitions 0/433 dead transitions. [2024-06-28 00:56:57,843 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 282 places, 433 transitions, 8562 flow [2024-06-28 00:56:57,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-28 00:56:57,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-28 00:56:57,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 271 transitions. [2024-06-28 00:56:57,844 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6022222222222222 [2024-06-28 00:56:57,844 INFO L175 Difference]: Start difference. First operand has 273 places, 386 transitions, 7076 flow. Second operand 10 states and 271 transitions. [2024-06-28 00:56:57,844 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 282 places, 433 transitions, 8562 flow [2024-06-28 00:56:58,930 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 278 places, 433 transitions, 8260 flow, removed 40 selfloop flow, removed 4 redundant places. [2024-06-28 00:56:58,936 INFO L231 Difference]: Finished difference. Result has 281 places, 395 transitions, 7494 flow [2024-06-28 00:56:58,936 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=6774, PETRI_DIFFERENCE_MINUEND_PLACES=269, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=386, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=193, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=190, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=7494, PETRI_PLACES=281, PETRI_TRANSITIONS=395} [2024-06-28 00:56:58,936 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 232 predicate places. [2024-06-28 00:56:58,936 INFO L495 AbstractCegarLoop]: Abstraction has has 281 places, 395 transitions, 7494 flow [2024-06-28 00:56:58,936 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.875) internal successors, (151), 8 states have internal predecessors, (151), 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) [2024-06-28 00:56:58,937 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:56:58,937 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:56:58,937 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64 [2024-06-28 00:56:58,937 INFO L420 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 00:56:58,937 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:56:58,937 INFO L85 PathProgramCache]: Analyzing trace with hash 1442122140, now seen corresponding path program 4 times [2024-06-28 00:56:58,937 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:56:58,937 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1785906654] [2024-06-28 00:56:58,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:56:58,938 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:56:58,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:56:59,033 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:56:59,034 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:56:59,034 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1785906654] [2024-06-28 00:56:59,034 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1785906654] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:56:59,034 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:56:59,034 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 00:56:59,034 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1816372709] [2024-06-28 00:56:59,034 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:56:59,035 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 00:56:59,035 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:56:59,035 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 00:56:59,035 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-28 00:56:59,070 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 45 [2024-06-28 00:56:59,071 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 281 places, 395 transitions, 7494 flow. Second operand has 7 states, 7 states have (on average 19.142857142857142) internal successors, (134), 7 states have internal predecessors, (134), 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) [2024-06-28 00:56:59,071 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:56:59,071 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 45 [2024-06-28 00:56:59,071 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:57:00,889 INFO L124 PetriNetUnfolderBase]: 5118/8499 cut-off events. [2024-06-28 00:57:00,889 INFO L125 PetriNetUnfolderBase]: For 340072/340320 co-relation queries the response was YES. [2024-06-28 00:57:00,953 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65376 conditions, 8499 events. 5118/8499 cut-off events. For 340072/340320 co-relation queries the response was YES. Maximal size of possible extension queue 548. Compared 60838 event pairs, 1245 based on Foata normal form. 172/8433 useless extension candidates. Maximal degree in co-relation 65238. Up to 7045 conditions per place. [2024-06-28 00:57:00,991 INFO L140 encePairwiseOnDemand]: 37/45 looper letters, 303 selfloop transitions, 105 changer transitions 0/423 dead transitions. [2024-06-28 00:57:00,991 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 286 places, 423 transitions, 8664 flow [2024-06-28 00:57:00,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-28 00:57:00,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-28 00:57:00,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 173 transitions. [2024-06-28 00:57:00,992 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6407407407407407 [2024-06-28 00:57:00,992 INFO L175 Difference]: Start difference. First operand has 281 places, 395 transitions, 7494 flow. Second operand 6 states and 173 transitions. [2024-06-28 00:57:00,992 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 286 places, 423 transitions, 8664 flow [2024-06-28 00:57:02,122 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 281 places, 423 transitions, 8329 flow, removed 64 selfloop flow, removed 5 redundant places. [2024-06-28 00:57:02,128 INFO L231 Difference]: Finished difference. Result has 282 places, 398 transitions, 7437 flow [2024-06-28 00:57:02,129 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=7162, PETRI_DIFFERENCE_MINUEND_PLACES=276, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=395, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=102, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=293, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=7437, PETRI_PLACES=282, PETRI_TRANSITIONS=398} [2024-06-28 00:57:02,129 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 233 predicate places. [2024-06-28 00:57:02,129 INFO L495 AbstractCegarLoop]: Abstraction has has 282 places, 398 transitions, 7437 flow [2024-06-28 00:57:02,129 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.142857142857142) internal successors, (134), 7 states have internal predecessors, (134), 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) [2024-06-28 00:57:02,129 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:57:02,129 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:57:02,129 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65 [2024-06-28 00:57:02,129 INFO L420 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 00:57:02,129 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:57:02,129 INFO L85 PathProgramCache]: Analyzing trace with hash 1691396014, now seen corresponding path program 5 times [2024-06-28 00:57:02,130 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:57:02,130 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [131744569] [2024-06-28 00:57:02,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:57:02,130 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:57:02,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:57:02,233 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:57:02,234 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:57:02,234 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [131744569] [2024-06-28 00:57:02,234 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [131744569] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:57:02,234 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:57:02,234 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 00:57:02,234 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [475976614] [2024-06-28 00:57:02,234 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:57:02,234 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 00:57:02,235 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:57:02,235 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 00:57:02,235 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-28 00:57:02,265 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 45 [2024-06-28 00:57:02,265 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 282 places, 398 transitions, 7437 flow. Second operand has 8 states, 8 states have (on average 18.875) internal successors, (151), 8 states have internal predecessors, (151), 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) [2024-06-28 00:57:02,265 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:57:02,265 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 45 [2024-06-28 00:57:02,265 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:57:03,993 INFO L124 PetriNetUnfolderBase]: 5062/8427 cut-off events. [2024-06-28 00:57:03,993 INFO L125 PetriNetUnfolderBase]: For 336399/336631 co-relation queries the response was YES. [2024-06-28 00:57:04,065 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64171 conditions, 8427 events. 5062/8427 cut-off events. For 336399/336631 co-relation queries the response was YES. Maximal size of possible extension queue 546. Compared 60614 event pairs, 1227 based on Foata normal form. 165/8339 useless extension candidates. Maximal degree in co-relation 64031. Up to 6956 conditions per place. [2024-06-28 00:57:04,110 INFO L140 encePairwiseOnDemand]: 36/45 looper letters, 295 selfloop transitions, 118 changer transitions 0/428 dead transitions. [2024-06-28 00:57:04,111 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 288 places, 428 transitions, 8504 flow [2024-06-28 00:57:04,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 00:57:04,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 00:57:04,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 195 transitions. [2024-06-28 00:57:04,112 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6190476190476191 [2024-06-28 00:57:04,112 INFO L175 Difference]: Start difference. First operand has 282 places, 398 transitions, 7437 flow. Second operand 7 states and 195 transitions. [2024-06-28 00:57:04,112 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 288 places, 428 transitions, 8504 flow [2024-06-28 00:57:05,501 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 282 places, 428 transitions, 8039 flow, removed 40 selfloop flow, removed 6 redundant places. [2024-06-28 00:57:05,507 INFO L231 Difference]: Finished difference. Result has 283 places, 401 transitions, 7259 flow [2024-06-28 00:57:05,507 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=6978, PETRI_DIFFERENCE_MINUEND_PLACES=276, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=398, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=115, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=283, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=7259, PETRI_PLACES=283, PETRI_TRANSITIONS=401} [2024-06-28 00:57:05,508 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 234 predicate places. [2024-06-28 00:57:05,508 INFO L495 AbstractCegarLoop]: Abstraction has has 283 places, 401 transitions, 7259 flow [2024-06-28 00:57:05,508 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.875) internal successors, (151), 8 states have internal predecessors, (151), 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) [2024-06-28 00:57:05,508 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:57:05,508 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:57:05,508 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66 [2024-06-28 00:57:05,508 INFO L420 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 00:57:05,508 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:57:05,508 INFO L85 PathProgramCache]: Analyzing trace with hash 1464590940, now seen corresponding path program 6 times [2024-06-28 00:57:05,508 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:57:05,508 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1416894457] [2024-06-28 00:57:05,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:57:05,509 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:57:05,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:57:05,605 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:57:05,605 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:57:05,605 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1416894457] [2024-06-28 00:57:05,605 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1416894457] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:57:05,606 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:57:05,606 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 00:57:05,606 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [903179319] [2024-06-28 00:57:05,606 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:57:05,607 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 00:57:05,607 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:57:05,607 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 00:57:05,607 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-28 00:57:05,630 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 45 [2024-06-28 00:57:05,631 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 283 places, 401 transitions, 7259 flow. Second operand has 7 states, 7 states have (on average 19.142857142857142) internal successors, (134), 7 states have internal predecessors, (134), 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) [2024-06-28 00:57:05,631 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:57:05,631 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 45 [2024-06-28 00:57:05,631 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:57:07,436 INFO L124 PetriNetUnfolderBase]: 5155/8563 cut-off events. [2024-06-28 00:57:07,436 INFO L125 PetriNetUnfolderBase]: For 342845/343100 co-relation queries the response was YES. [2024-06-28 00:57:07,510 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64699 conditions, 8563 events. 5155/8563 cut-off events. For 342845/343100 co-relation queries the response was YES. Maximal size of possible extension queue 557. Compared 61520 event pairs, 1255 based on Foata normal form. 187/8516 useless extension candidates. Maximal degree in co-relation 64561. Up to 7093 conditions per place. [2024-06-28 00:57:07,548 INFO L140 encePairwiseOnDemand]: 37/45 looper letters, 301 selfloop transitions, 108 changer transitions 1/425 dead transitions. [2024-06-28 00:57:07,548 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 288 places, 425 transitions, 8302 flow [2024-06-28 00:57:07,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-28 00:57:07,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-28 00:57:07,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 170 transitions. [2024-06-28 00:57:07,549 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6296296296296297 [2024-06-28 00:57:07,549 INFO L175 Difference]: Start difference. First operand has 283 places, 401 transitions, 7259 flow. Second operand 6 states and 170 transitions. [2024-06-28 00:57:07,549 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 288 places, 425 transitions, 8302 flow [2024-06-28 00:57:08,616 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 284 places, 425 transitions, 8133 flow, removed 10 selfloop flow, removed 4 redundant places. [2024-06-28 00:57:08,622 INFO L231 Difference]: Finished difference. Result has 285 places, 404 transitions, 7358 flow [2024-06-28 00:57:08,623 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=7093, PETRI_DIFFERENCE_MINUEND_PLACES=279, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=401, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=105, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=296, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=7358, PETRI_PLACES=285, PETRI_TRANSITIONS=404} [2024-06-28 00:57:08,623 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 236 predicate places. [2024-06-28 00:57:08,623 INFO L495 AbstractCegarLoop]: Abstraction has has 285 places, 404 transitions, 7358 flow [2024-06-28 00:57:08,623 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.142857142857142) internal successors, (134), 7 states have internal predecessors, (134), 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) [2024-06-28 00:57:08,623 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:57:08,623 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:57:08,623 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67 [2024-06-28 00:57:08,623 INFO L420 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 00:57:08,624 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:57:08,624 INFO L85 PathProgramCache]: Analyzing trace with hash 1023064906, now seen corresponding path program 1 times [2024-06-28 00:57:08,624 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:57:08,624 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2143036119] [2024-06-28 00:57:08,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:57:08,624 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:57:08,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:57:08,716 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:57:08,716 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:57:08,717 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2143036119] [2024-06-28 00:57:08,717 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2143036119] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:57:08,717 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:57:08,717 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 00:57:08,717 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [543781594] [2024-06-28 00:57:08,717 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:57:08,717 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 00:57:08,717 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:57:08,718 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 00:57:08,718 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-28 00:57:08,925 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 45 [2024-06-28 00:57:08,925 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 285 places, 404 transitions, 7358 flow. Second operand has 7 states, 7 states have (on average 19.142857142857142) internal successors, (134), 7 states have internal predecessors, (134), 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) [2024-06-28 00:57:08,925 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:57:08,925 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 45 [2024-06-28 00:57:08,925 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:57:10,604 INFO L124 PetriNetUnfolderBase]: 5185/8640 cut-off events. [2024-06-28 00:57:10,605 INFO L125 PetriNetUnfolderBase]: For 353033/353308 co-relation queries the response was YES. [2024-06-28 00:57:10,686 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65750 conditions, 8640 events. 5185/8640 cut-off events. For 353033/353308 co-relation queries the response was YES. Maximal size of possible extension queue 546. Compared 62183 event pairs, 1215 based on Foata normal form. 197/8637 useless extension candidates. Maximal degree in co-relation 65610. Up to 7253 conditions per place. [2024-06-28 00:57:10,732 INFO L140 encePairwiseOnDemand]: 36/45 looper letters, 291 selfloop transitions, 132 changer transitions 0/438 dead transitions. [2024-06-28 00:57:10,732 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 292 places, 438 transitions, 8541 flow [2024-06-28 00:57:10,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 00:57:10,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 00:57:10,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 217 transitions. [2024-06-28 00:57:10,733 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6027777777777777 [2024-06-28 00:57:10,733 INFO L175 Difference]: Start difference. First operand has 285 places, 404 transitions, 7358 flow. Second operand 8 states and 217 transitions. [2024-06-28 00:57:10,733 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 292 places, 438 transitions, 8541 flow [2024-06-28 00:57:12,347 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 289 places, 438 transitions, 8375 flow, removed 10 selfloop flow, removed 3 redundant places. [2024-06-28 00:57:12,353 INFO L231 Difference]: Finished difference. Result has 290 places, 410 transitions, 7602 flow [2024-06-28 00:57:12,354 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=7192, PETRI_DIFFERENCE_MINUEND_PLACES=282, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=404, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=126, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=278, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7602, PETRI_PLACES=290, PETRI_TRANSITIONS=410} [2024-06-28 00:57:12,354 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 241 predicate places. [2024-06-28 00:57:12,354 INFO L495 AbstractCegarLoop]: Abstraction has has 290 places, 410 transitions, 7602 flow [2024-06-28 00:57:12,354 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.142857142857142) internal successors, (134), 7 states have internal predecessors, (134), 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) [2024-06-28 00:57:12,354 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:57:12,354 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:57:12,354 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68 [2024-06-28 00:57:12,354 INFO L420 AbstractCegarLoop]: === Iteration 70 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 00:57:12,354 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:57:12,354 INFO L85 PathProgramCache]: Analyzing trace with hash 1714067926, now seen corresponding path program 2 times [2024-06-28 00:57:12,355 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:57:12,355 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [879031525] [2024-06-28 00:57:12,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:57:12,355 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:57:12,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:57:12,454 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:57:12,454 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:57:12,454 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [879031525] [2024-06-28 00:57:12,454 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [879031525] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:57:12,455 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:57:12,455 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 00:57:12,455 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [979466073] [2024-06-28 00:57:12,455 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:57:12,455 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 00:57:12,455 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:57:12,455 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 00:57:12,456 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-28 00:57:12,490 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 45 [2024-06-28 00:57:12,490 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 290 places, 410 transitions, 7602 flow. Second operand has 8 states, 8 states have (on average 18.875) internal successors, (151), 8 states have internal predecessors, (151), 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) [2024-06-28 00:57:12,490 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:57:12,490 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 45 [2024-06-28 00:57:12,490 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:57:14,143 INFO L124 PetriNetUnfolderBase]: 5176/8638 cut-off events. [2024-06-28 00:57:14,144 INFO L125 PetriNetUnfolderBase]: For 362299/362543 co-relation queries the response was YES. [2024-06-28 00:57:14,220 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65986 conditions, 8638 events. 5176/8638 cut-off events. For 362299/362543 co-relation queries the response was YES. Maximal size of possible extension queue 547. Compared 62190 event pairs, 1201 based on Foata normal form. 175/8609 useless extension candidates. Maximal degree in co-relation 65845. Up to 7239 conditions per place. [2024-06-28 00:57:14,259 INFO L140 encePairwiseOnDemand]: 35/45 looper letters, 288 selfloop transitions, 151 changer transitions 0/454 dead transitions. [2024-06-28 00:57:14,259 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 300 places, 454 transitions, 8977 flow [2024-06-28 00:57:14,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-28 00:57:14,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-28 00:57:14,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 290 transitions. [2024-06-28 00:57:14,260 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5858585858585859 [2024-06-28 00:57:14,260 INFO L175 Difference]: Start difference. First operand has 290 places, 410 transitions, 7602 flow. Second operand 11 states and 290 transitions. [2024-06-28 00:57:14,260 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 300 places, 454 transitions, 8977 flow [2024-06-28 00:57:15,690 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 295 places, 454 transitions, 8741 flow, removed 26 selfloop flow, removed 5 redundant places. [2024-06-28 00:57:15,696 INFO L231 Difference]: Finished difference. Result has 296 places, 416 transitions, 7831 flow [2024-06-28 00:57:15,696 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=7378, PETRI_DIFFERENCE_MINUEND_PLACES=285, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=410, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=145, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=265, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=7831, PETRI_PLACES=296, PETRI_TRANSITIONS=416} [2024-06-28 00:57:15,697 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 247 predicate places. [2024-06-28 00:57:15,697 INFO L495 AbstractCegarLoop]: Abstraction has has 296 places, 416 transitions, 7831 flow [2024-06-28 00:57:15,697 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.875) internal successors, (151), 8 states have internal predecessors, (151), 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) [2024-06-28 00:57:15,697 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:57:15,697 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:57:15,697 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69 [2024-06-28 00:57:15,697 INFO L420 AbstractCegarLoop]: === Iteration 71 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 00:57:15,697 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:57:15,697 INFO L85 PathProgramCache]: Analyzing trace with hash 387575980, now seen corresponding path program 3 times [2024-06-28 00:57:15,697 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:57:15,697 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1894749977] [2024-06-28 00:57:15,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:57:15,698 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:57:15,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:57:15,785 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:57:15,786 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:57:15,786 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1894749977] [2024-06-28 00:57:15,786 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1894749977] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:57:15,786 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:57:15,786 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 00:57:15,786 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1942450420] [2024-06-28 00:57:15,786 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:57:15,786 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 00:57:15,787 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:57:15,787 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 00:57:15,787 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-28 00:57:15,820 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 45 [2024-06-28 00:57:15,821 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 296 places, 416 transitions, 7831 flow. Second operand has 8 states, 8 states have (on average 18.875) internal successors, (151), 8 states have internal predecessors, (151), 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) [2024-06-28 00:57:15,821 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:57:15,821 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 45 [2024-06-28 00:57:15,821 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:57:17,595 INFO L124 PetriNetUnfolderBase]: 5259/8725 cut-off events. [2024-06-28 00:57:17,595 INFO L125 PetriNetUnfolderBase]: For 367638/367853 co-relation queries the response was YES. [2024-06-28 00:57:17,682 INFO L83 FinitePrefix]: Finished finitePrefix Result has 66828 conditions, 8725 events. 5259/8725 cut-off events. For 367638/367853 co-relation queries the response was YES. Maximal size of possible extension queue 555. Compared 62803 event pairs, 1268 based on Foata normal form. 173/8667 useless extension candidates. Maximal degree in co-relation 66687. Up to 6753 conditions per place. [2024-06-28 00:57:17,731 INFO L140 encePairwiseOnDemand]: 34/45 looper letters, 224 selfloop transitions, 216 changer transitions 0/455 dead transitions. [2024-06-28 00:57:17,731 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 304 places, 455 transitions, 9383 flow [2024-06-28 00:57:17,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 00:57:17,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 00:57:17,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 249 transitions. [2024-06-28 00:57:17,732 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6148148148148148 [2024-06-28 00:57:17,732 INFO L175 Difference]: Start difference. First operand has 296 places, 416 transitions, 7831 flow. Second operand 9 states and 249 transitions. [2024-06-28 00:57:17,732 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 304 places, 455 transitions, 9383 flow [2024-06-28 00:57:19,253 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 295 places, 455 transitions, 8981 flow, removed 37 selfloop flow, removed 9 redundant places. [2024-06-28 00:57:19,259 INFO L231 Difference]: Finished difference. Result has 296 places, 422 transitions, 7990 flow [2024-06-28 00:57:19,260 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=7437, PETRI_DIFFERENCE_MINUEND_PLACES=287, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=416, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=210, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=206, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7990, PETRI_PLACES=296, PETRI_TRANSITIONS=422} [2024-06-28 00:57:19,260 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 247 predicate places. [2024-06-28 00:57:19,260 INFO L495 AbstractCegarLoop]: Abstraction has has 296 places, 422 transitions, 7990 flow [2024-06-28 00:57:19,260 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.875) internal successors, (151), 8 states have internal predecessors, (151), 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) [2024-06-28 00:57:19,260 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:57:19,260 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:57:19,260 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70 [2024-06-28 00:57:19,260 INFO L420 AbstractCegarLoop]: === Iteration 72 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 00:57:19,261 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:57:19,261 INFO L85 PathProgramCache]: Analyzing trace with hash 512944516, now seen corresponding path program 7 times [2024-06-28 00:57:19,261 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:57:19,261 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [319552772] [2024-06-28 00:57:19,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:57:19,262 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:57:19,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:57:19,372 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:57:19,372 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:57:19,372 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [319552772] [2024-06-28 00:57:19,372 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [319552772] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:57:19,372 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:57:19,372 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 00:57:19,372 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2121889195] [2024-06-28 00:57:19,372 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:57:19,373 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 00:57:19,373 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:57:19,373 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 00:57:19,373 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-28 00:57:19,419 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 45 [2024-06-28 00:57:19,419 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 296 places, 422 transitions, 7990 flow. Second operand has 8 states, 8 states have (on average 18.875) internal successors, (151), 8 states have internal predecessors, (151), 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) [2024-06-28 00:57:19,419 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:57:19,419 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 45 [2024-06-28 00:57:19,419 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:57:21,060 INFO L124 PetriNetUnfolderBase]: 5252/8722 cut-off events. [2024-06-28 00:57:21,060 INFO L125 PetriNetUnfolderBase]: For 366357/366585 co-relation queries the response was YES. [2024-06-28 00:57:21,149 INFO L83 FinitePrefix]: Finished finitePrefix Result has 66785 conditions, 8722 events. 5252/8722 cut-off events. For 366357/366585 co-relation queries the response was YES. Maximal size of possible extension queue 558. Compared 62905 event pairs, 1281 based on Foata normal form. 156/8634 useless extension candidates. Maximal degree in co-relation 66645. Up to 7214 conditions per place. [2024-06-28 00:57:21,195 INFO L140 encePairwiseOnDemand]: 36/45 looper letters, 309 selfloop transitions, 122 changer transitions 0/446 dead transitions. [2024-06-28 00:57:21,196 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 302 places, 446 transitions, 9044 flow [2024-06-28 00:57:21,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 00:57:21,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 00:57:21,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 193 transitions. [2024-06-28 00:57:21,196 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6126984126984127 [2024-06-28 00:57:21,196 INFO L175 Difference]: Start difference. First operand has 296 places, 422 transitions, 7990 flow. Second operand 7 states and 193 transitions. [2024-06-28 00:57:21,197 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 302 places, 446 transitions, 9044 flow [2024-06-28 00:57:23,001 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 297 places, 446 transitions, 8644 flow, removed 18 selfloop flow, removed 5 redundant places. [2024-06-28 00:57:23,007 INFO L231 Difference]: Finished difference. Result has 298 places, 422 transitions, 7840 flow [2024-06-28 00:57:23,007 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=7590, PETRI_DIFFERENCE_MINUEND_PLACES=291, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=422, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=122, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=300, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=7840, PETRI_PLACES=298, PETRI_TRANSITIONS=422} [2024-06-28 00:57:23,008 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 249 predicate places. [2024-06-28 00:57:23,008 INFO L495 AbstractCegarLoop]: Abstraction has has 298 places, 422 transitions, 7840 flow [2024-06-28 00:57:23,008 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.875) internal successors, (151), 8 states have internal predecessors, (151), 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) [2024-06-28 00:57:23,008 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:57:23,008 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:57:23,008 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71 [2024-06-28 00:57:23,008 INFO L420 AbstractCegarLoop]: === Iteration 73 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 00:57:23,008 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:57:23,008 INFO L85 PathProgramCache]: Analyzing trace with hash 513104848, now seen corresponding path program 3 times [2024-06-28 00:57:23,009 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:57:23,009 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2054120428] [2024-06-28 00:57:23,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:57:23,009 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:57:23,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:57:23,110 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:57:23,110 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:57:23,110 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2054120428] [2024-06-28 00:57:23,110 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2054120428] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:57:23,110 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:57:23,110 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 00:57:23,111 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [591740282] [2024-06-28 00:57:23,111 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:57:23,111 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 00:57:23,111 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:57:23,111 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 00:57:23,111 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-28 00:57:23,139 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 45 [2024-06-28 00:57:23,139 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 298 places, 422 transitions, 7840 flow. Second operand has 8 states, 8 states have (on average 18.875) internal successors, (151), 8 states have internal predecessors, (151), 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) [2024-06-28 00:57:23,139 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:57:23,139 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 45 [2024-06-28 00:57:23,140 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:57:24,944 INFO L124 PetriNetUnfolderBase]: 5200/8679 cut-off events. [2024-06-28 00:57:24,944 INFO L125 PetriNetUnfolderBase]: For 367785/368052 co-relation queries the response was YES. [2024-06-28 00:57:25,024 INFO L83 FinitePrefix]: Finished finitePrefix Result has 66066 conditions, 8679 events. 5200/8679 cut-off events. For 367785/368052 co-relation queries the response was YES. Maximal size of possible extension queue 550. Compared 62532 event pairs, 1202 based on Foata normal form. 190/8667 useless extension candidates. Maximal degree in co-relation 65925. Up to 7274 conditions per place. [2024-06-28 00:57:25,064 INFO L140 encePairwiseOnDemand]: 35/45 looper letters, 293 selfloop transitions, 151 changer transitions 0/459 dead transitions. [2024-06-28 00:57:25,064 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 308 places, 459 transitions, 8966 flow [2024-06-28 00:57:25,065 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-28 00:57:25,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-28 00:57:25,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 289 transitions. [2024-06-28 00:57:25,065 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5838383838383838 [2024-06-28 00:57:25,065 INFO L175 Difference]: Start difference. First operand has 298 places, 422 transitions, 7840 flow. Second operand 11 states and 289 transitions. [2024-06-28 00:57:25,065 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 308 places, 459 transitions, 8966 flow [2024-06-28 00:57:26,968 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 302 places, 459 transitions, 8601 flow, removed 18 selfloop flow, removed 6 redundant places. [2024-06-28 00:57:26,975 INFO L231 Difference]: Finished difference. Result has 303 places, 422 transitions, 7790 flow [2024-06-28 00:57:26,975 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=7475, PETRI_DIFFERENCE_MINUEND_PLACES=292, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=422, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=151, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=271, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=7790, PETRI_PLACES=303, PETRI_TRANSITIONS=422} [2024-06-28 00:57:26,975 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 254 predicate places. [2024-06-28 00:57:26,975 INFO L495 AbstractCegarLoop]: Abstraction has has 303 places, 422 transitions, 7790 flow [2024-06-28 00:57:26,975 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.875) internal successors, (151), 8 states have internal predecessors, (151), 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) [2024-06-28 00:57:26,975 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:57:26,975 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:57:26,975 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72 [2024-06-28 00:57:26,976 INFO L420 AbstractCegarLoop]: === Iteration 74 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 00:57:26,976 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:57:26,976 INFO L85 PathProgramCache]: Analyzing trace with hash 686497226, now seen corresponding path program 4 times [2024-06-28 00:57:26,976 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:57:26,976 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1026670946] [2024-06-28 00:57:26,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:57:26,976 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:57:26,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:57:27,060 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:57:27,060 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:57:27,060 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1026670946] [2024-06-28 00:57:27,060 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1026670946] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:57:27,060 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:57:27,060 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 00:57:27,060 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [694822312] [2024-06-28 00:57:27,061 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:57:27,061 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 00:57:27,061 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:57:27,061 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 00:57:27,061 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-28 00:57:27,089 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 45 [2024-06-28 00:57:27,090 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 303 places, 422 transitions, 7790 flow. Second operand has 8 states, 8 states have (on average 18.875) internal successors, (151), 8 states have internal predecessors, (151), 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) [2024-06-28 00:57:27,090 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:57:27,090 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 45 [2024-06-28 00:57:27,090 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:57:28,749 INFO L124 PetriNetUnfolderBase]: 5161/8595 cut-off events. [2024-06-28 00:57:28,749 INFO L125 PetriNetUnfolderBase]: For 370013/370265 co-relation queries the response was YES. [2024-06-28 00:57:28,830 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65200 conditions, 8595 events. 5161/8595 cut-off events. For 370013/370265 co-relation queries the response was YES. Maximal size of possible extension queue 559. Compared 62030 event pairs, 1216 based on Foata normal form. 188/8533 useless extension candidates. Maximal degree in co-relation 65059. Up to 6628 conditions per place. [2024-06-28 00:57:28,871 INFO L140 encePairwiseOnDemand]: 34/45 looper letters, 225 selfloop transitions, 220 changer transitions 0/460 dead transitions. [2024-06-28 00:57:28,871 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 313 places, 460 transitions, 9156 flow [2024-06-28 00:57:28,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-28 00:57:28,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-28 00:57:28,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 294 transitions. [2024-06-28 00:57:28,872 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.593939393939394 [2024-06-28 00:57:28,872 INFO L175 Difference]: Start difference. First operand has 303 places, 422 transitions, 7790 flow. Second operand 11 states and 294 transitions. [2024-06-28 00:57:28,872 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 313 places, 460 transitions, 9156 flow [2024-06-28 00:57:30,545 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 303 places, 460 transitions, 8848 flow, removed 22 selfloop flow, removed 10 redundant places. [2024-06-28 00:57:30,551 INFO L231 Difference]: Finished difference. Result has 304 places, 422 transitions, 7934 flow [2024-06-28 00:57:30,552 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=7488, PETRI_DIFFERENCE_MINUEND_PLACES=293, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=422, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=220, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=202, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=7934, PETRI_PLACES=304, PETRI_TRANSITIONS=422} [2024-06-28 00:57:30,552 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 255 predicate places. [2024-06-28 00:57:30,552 INFO L495 AbstractCegarLoop]: Abstraction has has 304 places, 422 transitions, 7934 flow [2024-06-28 00:57:30,552 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.875) internal successors, (151), 8 states have internal predecessors, (151), 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) [2024-06-28 00:57:30,552 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:57:30,552 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:57:30,553 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73 [2024-06-28 00:57:30,553 INFO L420 AbstractCegarLoop]: === Iteration 75 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 00:57:30,553 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:57:30,553 INFO L85 PathProgramCache]: Analyzing trace with hash 513104476, now seen corresponding path program 8 times [2024-06-28 00:57:30,553 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:57:30,553 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [975482457] [2024-06-28 00:57:30,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:57:30,553 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:57:30,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:57:30,652 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:57:30,653 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:57:30,653 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [975482457] [2024-06-28 00:57:30,653 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [975482457] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:57:30,653 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:57:30,653 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 00:57:30,653 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1702672657] [2024-06-28 00:57:30,653 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:57:30,653 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 00:57:30,653 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:57:30,653 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 00:57:30,654 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2024-06-28 00:57:30,683 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 45 [2024-06-28 00:57:30,683 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 304 places, 422 transitions, 7934 flow. Second operand has 8 states, 8 states have (on average 18.875) internal successors, (151), 8 states have internal predecessors, (151), 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) [2024-06-28 00:57:30,683 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:57:30,683 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 45 [2024-06-28 00:57:30,683 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand