./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-wmm/thin002_pso.oepc_pso.opt_tso.oepc_tso.opt.i --full-output --witness-type correctness_witness --witnessparser.only.consider.loop.invariants false --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --validate ./goblint.2024-06-19_11-23-25.files/protection/thin002_pso.oepc_pso.opt_tso.oepc_tso.opt.yml/witness.yml --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version eb4cb34f Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReachWitnessValidation.xml -i ../../../trunk/examples/svcomp/pthread-wmm/thin002_pso.oepc_pso.opt_tso.oepc_tso.opt.i ./goblint.2024-06-19_11-23-25.files/protection/thin002_pso.oepc_pso.opt_tso.oepc_tso.opt.yml/witness.yml -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --traceabstraction.compute.hoare.annotation.of.negated.interpolant.automaton,.abstraction.and.cfg false --witnessparser.only.consider.loop.invariants false --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --- Real Ultimate output --- This is Ultimate 0.2.4-tmp.fs.goblint-validation-eb4cb34-m [2024-06-21 16:01:14,357 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-21 16:01:14,423 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-21 16:01:14,427 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-21 16:01:14,428 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-21 16:01:14,453 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-21 16:01:14,453 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-21 16:01:14,453 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-21 16:01:14,454 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-21 16:01:14,455 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-21 16:01:14,455 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-21 16:01:14,455 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-21 16:01:14,456 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-21 16:01:14,456 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-21 16:01:14,456 INFO L153 SettingsManager]: * Use SBE=true [2024-06-21 16:01:14,457 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-21 16:01:14,457 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-21 16:01:14,457 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-21 16:01:14,457 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-21 16:01:14,458 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-21 16:01:14,458 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-21 16:01:14,459 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-21 16:01:14,459 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-21 16:01:14,459 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-21 16:01:14,459 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-21 16:01:14,460 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-21 16:01:14,460 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-21 16:01:14,460 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-21 16:01:14,461 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-21 16:01:14,461 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-21 16:01:14,462 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-21 16:01:14,462 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-21 16:01:14,462 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-21 16:01:14,462 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-21 16:01:14,462 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-21 16:01:14,463 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-21 16:01:14,463 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-21 16:01:14,463 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-21 16:01:14,463 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-21 16:01:14,463 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-21 16:01:14,463 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-21 16:01:14,464 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-21 16:01:14,464 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-21 16:01:14,464 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false [2024-06-21 16:01:14,680 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-21 16:01:14,696 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-21 16:01:14,699 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-21 16:01:14,700 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-21 16:01:14,700 INFO L274 PluginConnector]: CDTParser initialized [2024-06-21 16:01:14,701 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/thin002_pso.oepc_pso.opt_tso.oepc_tso.opt.i [2024-06-21 16:01:15,761 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-21 16:01:16,007 INFO L384 CDTParser]: Found 1 translation units. [2024-06-21 16:01:16,010 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/thin002_pso.oepc_pso.opt_tso.oepc_tso.opt.i [2024-06-21 16:01:16,023 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/15a7f8f1a/f0369de116c24a1e8a37c0934d534d78/FLAG77f55d989 [2024-06-21 16:01:16,034 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/15a7f8f1a/f0369de116c24a1e8a37c0934d534d78 [2024-06-21 16:01:16,036 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-06-21 16:01:16,036 INFO L274 PluginConnector]: Witness Parser initialized [2024-06-21 16:01:16,037 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-06-19_11-23-25.files/protection/thin002_pso.oepc_pso.opt_tso.oepc_tso.opt.yml/witness.yml [2024-06-21 16:01:16,175 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-21 16:01:16,176 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-06-21 16:01:16,177 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-21 16:01:16,177 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-21 16:01:16,203 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-21 16:01:16,203 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.06 04:01:16" (1/2) ... [2024-06-21 16:01:16,204 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1ee75f27 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 04:01:16, skipping insertion in model container [2024-06-21 16:01:16,204 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.06 04:01:16" (1/2) ... [2024-06-21 16:01:16,205 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@1aa625d5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 04:01:16, skipping insertion in model container [2024-06-21 16:01:16,205 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 21.06 04:01:16" (2/2) ... [2024-06-21 16:01:16,206 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1ee75f27 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 04:01:16, skipping insertion in model container [2024-06-21 16:01:16,206 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 21.06 04:01:16" (2/2) ... [2024-06-21 16:01:16,206 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-06-21 16:01:16,251 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-06-21 16:01:16,252 INFO L97 edCorrectnessWitness]: Location invariant before [L803-L803] ((((((((! multithreaded || (a == 0 || a == 1)) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || (y == 0 || y == 1))) && (! multithreaded || (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1))) && (! multithreaded || (__unbuffered_p3_EAX == 0 || __unbuffered_p3_EAX == 1))) && (! multithreaded || (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1))) && (! multithreaded || (z == 0 || z == 1))) && (! multithreaded || (x == 0 || x == 1))) && (! multithreaded || (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1)) [2024-06-21 16:01:16,252 INFO L97 edCorrectnessWitness]: Location invariant before [L807-L807] ((((((((! multithreaded || (a == 0 || a == 1)) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || (y == 0 || y == 1))) && (! multithreaded || (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1))) && (! multithreaded || (__unbuffered_p3_EAX == 0 || __unbuffered_p3_EAX == 1))) && (! multithreaded || (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1))) && (! multithreaded || (z == 0 || z == 1))) && (! multithreaded || (x == 0 || x == 1))) && (! multithreaded || (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1)) [2024-06-21 16:01:16,252 INFO L97 edCorrectnessWitness]: Location invariant before [L808-L808] ((((((((! multithreaded || (a == 0 || a == 1)) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || (y == 0 || y == 1))) && (! multithreaded || (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1))) && (! multithreaded || (__unbuffered_p3_EAX == 0 || __unbuffered_p3_EAX == 1))) && (! multithreaded || (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1))) && (! multithreaded || (z == 0 || z == 1))) && (! multithreaded || (x == 0 || x == 1))) && (! multithreaded || (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1)) [2024-06-21 16:01:16,252 INFO L97 edCorrectnessWitness]: Location invariant before [L805-L805] ((((((((! multithreaded || (a == 0 || a == 1)) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || (y == 0 || y == 1))) && (! multithreaded || (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1))) && (! multithreaded || (__unbuffered_p3_EAX == 0 || __unbuffered_p3_EAX == 1))) && (! multithreaded || (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1))) && (! multithreaded || (z == 0 || z == 1))) && (! multithreaded || (x == 0 || x == 1))) && (! multithreaded || (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1)) [2024-06-21 16:01:16,252 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-06-21 16:01:16,253 INFO L106 edCorrectnessWitness]: ghost_update [L801-L801] multithreaded = 1; [2024-06-21 16:01:16,286 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-21 16:01:16,576 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-21 16:01:16,583 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-06-21 16:01:16,682 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-21 16:01:16,709 INFO L206 MainTranslator]: Completed translation [2024-06-21 16:01:16,710 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 04:01:16 WrapperNode [2024-06-21 16:01:16,710 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-21 16:01:16,711 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-21 16:01:16,711 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-21 16:01:16,711 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-21 16:01:16,716 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 21.06 04:01:16" (1/1) ... [2024-06-21 16:01:16,731 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 21.06 04:01:16" (1/1) ... [2024-06-21 16:01:16,762 INFO L138 Inliner]: procedures = 176, calls = 51, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 77 [2024-06-21 16:01:16,763 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-21 16:01:16,764 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-21 16:01:16,764 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-21 16:01:16,764 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-21 16:01:16,772 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 04:01:16" (1/1) ... [2024-06-21 16:01:16,773 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 04:01:16" (1/1) ... [2024-06-21 16:01:16,775 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 04:01:16" (1/1) ... [2024-06-21 16:01:16,786 INFO L175 MemorySlicer]: Split 2 memory accesses to 1 slices as follows [2]. 100 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2]. The 0 writes are split as follows [0]. [2024-06-21 16:01:16,787 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 04:01:16" (1/1) ... [2024-06-21 16:01:16,787 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 04:01:16" (1/1) ... [2024-06-21 16:01:16,792 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 04:01:16" (1/1) ... [2024-06-21 16:01:16,797 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 04:01:16" (1/1) ... [2024-06-21 16:01:16,799 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 04:01:16" (1/1) ... [2024-06-21 16:01:16,800 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 04:01:16" (1/1) ... [2024-06-21 16:01:16,801 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-21 16:01:16,802 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-21 16:01:16,803 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-21 16:01:16,803 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-21 16:01:16,811 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 04:01:16" (1/1) ... [2024-06-21 16:01:16,821 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-21 16:01:16,827 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-21 16:01:16,840 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-06-21 16:01:16,855 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-06-21 16:01:16,884 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-06-21 16:01:16,884 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-21 16:01:16,884 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2024-06-21 16:01:16,885 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2024-06-21 16:01:16,885 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2024-06-21 16:01:16,885 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2024-06-21 16:01:16,885 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2024-06-21 16:01:16,885 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2024-06-21 16:01:16,885 INFO L130 BoogieDeclarations]: Found specification of procedure P3 [2024-06-21 16:01:16,885 INFO L138 BoogieDeclarations]: Found implementation of procedure P3 [2024-06-21 16:01:16,885 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-21 16:01:16,886 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-06-21 16:01:16,886 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-21 16:01:16,886 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-21 16:01:16,887 WARN L214 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2024-06-21 16:01:16,983 INFO L244 CfgBuilder]: Building ICFG [2024-06-21 16:01:16,985 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-21 16:01:17,228 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-21 16:01:17,228 INFO L293 CfgBuilder]: Performing block encoding [2024-06-21 16:01:17,329 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-21 16:01:17,329 INFO L320 CfgBuilder]: Removed 0 assume(true) statements. [2024-06-21 16:01:17,330 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.06 04:01:17 BoogieIcfgContainer [2024-06-21 16:01:17,330 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-21 16:01:17,332 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-21 16:01:17,333 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-21 16:01:17,335 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-21 16:01:17,335 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.06 04:01:16" (1/4) ... [2024-06-21 16:01:17,336 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7d307e27 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.06 04:01:17, skipping insertion in model container [2024-06-21 16:01:17,340 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 21.06 04:01:16" (2/4) ... [2024-06-21 16:01:17,341 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7d307e27 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 21.06 04:01:17, skipping insertion in model container [2024-06-21 16:01:17,341 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 04:01:16" (3/4) ... [2024-06-21 16:01:17,341 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7d307e27 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 21.06 04:01:17, skipping insertion in model container [2024-06-21 16:01:17,341 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.06 04:01:17" (4/4) ... [2024-06-21 16:01:17,342 INFO L112 eAbstractionObserver]: Analyzing ICFG thin002_pso.oepc_pso.opt_tso.oepc_tso.opt.i [2024-06-21 16:01:17,354 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-21 16:01:17,355 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 4 error locations. [2024-06-21 16:01:17,355 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-21 16:01:17,406 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-06-21 16:01:17,435 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 64 places, 51 transitions, 118 flow [2024-06-21 16:01:17,476 INFO L124 PetriNetUnfolderBase]: 0/47 cut-off events. [2024-06-21 16:01:17,476 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-21 16:01:17,478 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60 conditions, 47 events. 0/47 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 81 event pairs, 0 based on Foata normal form. 0/43 useless extension candidates. Maximal degree in co-relation 0. Up to 1 conditions per place. [2024-06-21 16:01:17,478 INFO L82 GeneralOperation]: Start removeDead. Operand has 64 places, 51 transitions, 118 flow [2024-06-21 16:01:17,486 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 54 places, 41 transitions, 94 flow [2024-06-21 16:01:17,492 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-21 16:01:17,496 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;@44b3811, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-21 16:01:17,497 INFO L358 AbstractCegarLoop]: Starting to check reachability of 8 error locations. [2024-06-21 16:01:17,506 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-21 16:01:17,506 INFO L124 PetriNetUnfolderBase]: 0/5 cut-off events. [2024-06-21 16:01:17,506 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-21 16:01:17,507 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:01:17,507 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2024-06-21 16:01:17,507 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 16:01:17,511 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:01:17,513 INFO L85 PathProgramCache]: Analyzing trace with hash 237074108, now seen corresponding path program 1 times [2024-06-21 16:01:17,519 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:01:17,520 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [697097795] [2024-06-21 16:01:17,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:01:17,520 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:01:17,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:01:17,955 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:01:17,956 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:01:17,957 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [697097795] [2024-06-21 16:01:17,957 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [697097795] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:01:17,958 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:01:17,958 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-06-21 16:01:17,960 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [889654140] [2024-06-21 16:01:17,960 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:01:17,970 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-21 16:01:17,974 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:01:17,998 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-21 16:01:17,999 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-21 16:01:18,036 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 21 out of 51 [2024-06-21 16:01:18,039 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 41 transitions, 94 flow. Second operand has 3 states, 3 states have (on average 22.333333333333332) internal successors, (67), 3 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:01:18,039 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:01:18,039 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 21 of 51 [2024-06-21 16:01:18,040 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:01:18,492 INFO L124 PetriNetUnfolderBase]: 2723/4077 cut-off events. [2024-06-21 16:01:18,492 INFO L125 PetriNetUnfolderBase]: For 82/82 co-relation queries the response was YES. [2024-06-21 16:01:18,501 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8077 conditions, 4077 events. 2723/4077 cut-off events. For 82/82 co-relation queries the response was YES. Maximal size of possible extension queue 214. Compared 22522 event pairs, 1898 based on Foata normal form. 1/3991 useless extension candidates. Maximal degree in co-relation 8064. Up to 3813 conditions per place. [2024-06-21 16:01:18,518 INFO L140 encePairwiseOnDemand]: 42/51 looper letters, 37 selfloop transitions, 5 changer transitions 0/55 dead transitions. [2024-06-21 16:01:18,518 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 55 transitions, 215 flow [2024-06-21 16:01:18,519 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-21 16:01:18,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-21 16:01:18,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 109 transitions. [2024-06-21 16:01:18,528 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7124183006535948 [2024-06-21 16:01:18,529 INFO L175 Difference]: Start difference. First operand has 54 places, 41 transitions, 94 flow. Second operand 3 states and 109 transitions. [2024-06-21 16:01:18,530 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 55 transitions, 215 flow [2024-06-21 16:01:18,532 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 55 transitions, 208 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-06-21 16:01:18,537 INFO L231 Difference]: Finished difference. Result has 53 places, 45 transitions, 129 flow [2024-06-21 16:01:18,538 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=90, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=129, PETRI_PLACES=53, PETRI_TRANSITIONS=45} [2024-06-21 16:01:18,541 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, -1 predicate places. [2024-06-21 16:01:18,541 INFO L495 AbstractCegarLoop]: Abstraction has has 53 places, 45 transitions, 129 flow [2024-06-21 16:01:18,542 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.333333333333332) internal successors, (67), 3 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:01:18,542 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:01:18,542 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:01:18,542 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-21 16:01:18,542 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 16:01:18,543 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:01:18,543 INFO L85 PathProgramCache]: Analyzing trace with hash 1772714873, now seen corresponding path program 1 times [2024-06-21 16:01:18,544 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:01:18,544 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [506492767] [2024-06-21 16:01:18,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:01:18,544 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:01:18,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:01:18,772 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:01:18,773 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:01:18,773 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [506492767] [2024-06-21 16:01:18,773 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [506492767] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:01:18,773 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:01:18,774 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-21 16:01:18,774 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [765728575] [2024-06-21 16:01:18,774 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:01:18,776 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-21 16:01:18,776 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:01:18,776 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-21 16:01:18,777 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-21 16:01:18,813 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 51 [2024-06-21 16:01:18,814 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 45 transitions, 129 flow. Second operand has 5 states, 5 states have (on average 20.2) internal successors, (101), 5 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:01:18,814 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:01:18,814 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 51 [2024-06-21 16:01:18,814 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:01:19,275 INFO L124 PetriNetUnfolderBase]: 4389/6481 cut-off events. [2024-06-21 16:01:19,276 INFO L125 PetriNetUnfolderBase]: For 1055/1075 co-relation queries the response was YES. [2024-06-21 16:01:19,284 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14771 conditions, 6481 events. 4389/6481 cut-off events. For 1055/1075 co-relation queries the response was YES. Maximal size of possible extension queue 308. Compared 36508 event pairs, 2308 based on Foata normal form. 10/6482 useless extension candidates. Maximal degree in co-relation 14759. Up to 6039 conditions per place. [2024-06-21 16:01:19,306 INFO L140 encePairwiseOnDemand]: 41/51 looper letters, 54 selfloop transitions, 9 changer transitions 0/74 dead transitions. [2024-06-21 16:01:19,307 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 74 transitions, 338 flow [2024-06-21 16:01:19,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-21 16:01:19,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-21 16:01:19,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 139 transitions. [2024-06-21 16:01:19,311 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6813725490196079 [2024-06-21 16:01:19,312 INFO L175 Difference]: Start difference. First operand has 53 places, 45 transitions, 129 flow. Second operand 4 states and 139 transitions. [2024-06-21 16:01:19,312 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 74 transitions, 338 flow [2024-06-21 16:01:19,314 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 74 transitions, 330 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-21 16:01:19,315 INFO L231 Difference]: Finished difference. Result has 57 places, 53 transitions, 200 flow [2024-06-21 16:01:19,316 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=124, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=200, PETRI_PLACES=57, PETRI_TRANSITIONS=53} [2024-06-21 16:01:19,316 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 3 predicate places. [2024-06-21 16:01:19,317 INFO L495 AbstractCegarLoop]: Abstraction has has 57 places, 53 transitions, 200 flow [2024-06-21 16:01:19,319 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 20.2) internal successors, (101), 5 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:01:19,319 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:01:19,319 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:01:19,319 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-06-21 16:01:19,320 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 16:01:19,326 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:01:19,326 INFO L85 PathProgramCache]: Analyzing trace with hash -1522984968, now seen corresponding path program 1 times [2024-06-21 16:01:19,326 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:01:19,327 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [580625632] [2024-06-21 16:01:19,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:01:19,328 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:01:19,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:01:19,547 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:01:19,547 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:01:19,548 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [580625632] [2024-06-21 16:01:19,548 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [580625632] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:01:19,548 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:01:19,548 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 16:01:19,548 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [268370246] [2024-06-21 16:01:19,548 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:01:19,549 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 16:01:19,549 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:01:19,549 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 16:01:19,549 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-21 16:01:19,599 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 51 [2024-06-21 16:01:19,600 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 53 transitions, 200 flow. Second operand has 6 states, 6 states have (on average 20.166666666666668) internal successors, (121), 6 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:01:19,600 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:01:19,600 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 51 [2024-06-21 16:01:19,601 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:01:20,157 INFO L124 PetriNetUnfolderBase]: 4373/6453 cut-off events. [2024-06-21 16:01:20,157 INFO L125 PetriNetUnfolderBase]: For 3044/3123 co-relation queries the response was YES. [2024-06-21 16:01:20,166 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16579 conditions, 6453 events. 4373/6453 cut-off events. For 3044/3123 co-relation queries the response was YES. Maximal size of possible extension queue 308. Compared 36299 event pairs, 1831 based on Foata normal form. 32/6476 useless extension candidates. Maximal degree in co-relation 16564. Up to 5973 conditions per place. [2024-06-21 16:01:20,188 INFO L140 encePairwiseOnDemand]: 41/51 looper letters, 61 selfloop transitions, 12 changer transitions 0/84 dead transitions. [2024-06-21 16:01:20,188 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 84 transitions, 430 flow [2024-06-21 16:01:20,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-21 16:01:20,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-21 16:01:20,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 168 transitions. [2024-06-21 16:01:20,190 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6588235294117647 [2024-06-21 16:01:20,190 INFO L175 Difference]: Start difference. First operand has 57 places, 53 transitions, 200 flow. Second operand 5 states and 168 transitions. [2024-06-21 16:01:20,190 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 84 transitions, 430 flow [2024-06-21 16:01:20,192 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 84 transitions, 426 flow, removed 2 selfloop flow, removed 0 redundant places. [2024-06-21 16:01:20,193 INFO L231 Difference]: Finished difference. Result has 61 places, 55 transitions, 246 flow [2024-06-21 16:01:20,193 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=190, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=52, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=246, PETRI_PLACES=61, PETRI_TRANSITIONS=55} [2024-06-21 16:01:20,193 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 7 predicate places. [2024-06-21 16:01:20,194 INFO L495 AbstractCegarLoop]: Abstraction has has 61 places, 55 transitions, 246 flow [2024-06-21 16:01:20,194 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 20.166666666666668) internal successors, (121), 6 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:01:20,194 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:01:20,194 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:01:20,194 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-06-21 16:01:20,194 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 16:01:20,195 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:01:20,195 INFO L85 PathProgramCache]: Analyzing trace with hash 1039655761, now seen corresponding path program 1 times [2024-06-21 16:01:20,195 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:01:20,195 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1862245733] [2024-06-21 16:01:20,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:01:20,195 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:01:20,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:01:20,314 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:01:20,315 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:01:20,315 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1862245733] [2024-06-21 16:01:20,315 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1862245733] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:01:20,315 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:01:20,315 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-21 16:01:20,316 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [599396847] [2024-06-21 16:01:20,316 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:01:20,316 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-21 16:01:20,316 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:01:20,317 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-21 16:01:20,317 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-21 16:01:20,436 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 51 [2024-06-21 16:01:20,436 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 55 transitions, 246 flow. Second operand has 5 states, 5 states have (on average 20.8) internal successors, (104), 5 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:01:20,437 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:01:20,437 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 51 [2024-06-21 16:01:20,437 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:01:20,840 INFO L124 PetriNetUnfolderBase]: 4310/6334 cut-off events. [2024-06-21 16:01:20,840 INFO L125 PetriNetUnfolderBase]: For 5513/5523 co-relation queries the response was YES. [2024-06-21 16:01:20,851 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17797 conditions, 6334 events. 4310/6334 cut-off events. For 5513/5523 co-relation queries the response was YES. Maximal size of possible extension queue 301. Compared 36114 event pairs, 2266 based on Foata normal form. 6/6330 useless extension candidates. Maximal degree in co-relation 17779. Up to 5934 conditions per place. [2024-06-21 16:01:20,878 INFO L140 encePairwiseOnDemand]: 42/51 looper letters, 61 selfloop transitions, 11 changer transitions 0/83 dead transitions. [2024-06-21 16:01:20,879 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 83 transitions, 494 flow [2024-06-21 16:01:20,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-21 16:01:20,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-21 16:01:20,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 134 transitions. [2024-06-21 16:01:20,881 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6568627450980392 [2024-06-21 16:01:20,881 INFO L175 Difference]: Start difference. First operand has 61 places, 55 transitions, 246 flow. Second operand 4 states and 134 transitions. [2024-06-21 16:01:20,881 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 83 transitions, 494 flow [2024-06-21 16:01:20,886 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 83 transitions, 458 flow, removed 5 selfloop flow, removed 3 redundant places. [2024-06-21 16:01:20,887 INFO L231 Difference]: Finished difference. Result has 63 places, 65 transitions, 323 flow [2024-06-21 16:01:20,887 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=216, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=55, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=323, PETRI_PLACES=63, PETRI_TRANSITIONS=65} [2024-06-21 16:01:20,888 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 9 predicate places. [2024-06-21 16:01:20,888 INFO L495 AbstractCegarLoop]: Abstraction has has 63 places, 65 transitions, 323 flow [2024-06-21 16:01:20,889 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 20.8) internal successors, (104), 5 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:01:20,889 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:01:20,889 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:01:20,889 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-06-21 16:01:20,889 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 16:01:20,890 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:01:20,890 INFO L85 PathProgramCache]: Analyzing trace with hash -1795643978, now seen corresponding path program 1 times [2024-06-21 16:01:20,890 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:01:20,890 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [913466333] [2024-06-21 16:01:20,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:01:20,890 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:01:20,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:01:21,144 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:01:21,145 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:01:21,145 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [913466333] [2024-06-21 16:01:21,145 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [913466333] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:01:21,145 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:01:21,145 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 16:01:21,146 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [422997487] [2024-06-21 16:01:21,146 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:01:21,146 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 16:01:21,146 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:01:21,147 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 16:01:21,147 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-21 16:01:21,189 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 51 [2024-06-21 16:01:21,189 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 65 transitions, 323 flow. Second operand has 6 states, 6 states have (on average 20.666666666666668) internal successors, (124), 6 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:01:21,190 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:01:21,190 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 51 [2024-06-21 16:01:21,190 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:01:21,789 INFO L124 PetriNetUnfolderBase]: 5207/7676 cut-off events. [2024-06-21 16:01:21,790 INFO L125 PetriNetUnfolderBase]: For 11019/11281 co-relation queries the response was YES. [2024-06-21 16:01:21,803 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23680 conditions, 7676 events. 5207/7676 cut-off events. For 11019/11281 co-relation queries the response was YES. Maximal size of possible extension queue 363. Compared 44169 event pairs, 2250 based on Foata normal form. 57/7678 useless extension candidates. Maximal degree in co-relation 23660. Up to 7050 conditions per place. [2024-06-21 16:01:21,901 INFO L140 encePairwiseOnDemand]: 41/51 looper letters, 66 selfloop transitions, 25 changer transitions 0/104 dead transitions. [2024-06-21 16:01:21,901 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 104 transitions, 659 flow [2024-06-21 16:01:21,902 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-21 16:01:21,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-21 16:01:21,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 172 transitions. [2024-06-21 16:01:21,903 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6745098039215687 [2024-06-21 16:01:21,903 INFO L175 Difference]: Start difference. First operand has 63 places, 65 transitions, 323 flow. Second operand 5 states and 172 transitions. [2024-06-21 16:01:21,903 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 104 transitions, 659 flow [2024-06-21 16:01:21,909 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 104 transitions, 651 flow, removed 4 selfloop flow, removed 0 redundant places. [2024-06-21 16:01:21,911 INFO L231 Difference]: Finished difference. Result has 68 places, 73 transitions, 436 flow [2024-06-21 16:01:21,911 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=315, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=65, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=436, PETRI_PLACES=68, PETRI_TRANSITIONS=73} [2024-06-21 16:01:21,911 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 14 predicate places. [2024-06-21 16:01:21,911 INFO L495 AbstractCegarLoop]: Abstraction has has 68 places, 73 transitions, 436 flow [2024-06-21 16:01:21,912 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 20.666666666666668) internal successors, (124), 6 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:01:21,912 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:01:21,912 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:01:21,912 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-06-21 16:01:21,912 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 16:01:21,913 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:01:21,913 INFO L85 PathProgramCache]: Analyzing trace with hash 738796918, now seen corresponding path program 2 times [2024-06-21 16:01:21,913 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:01:21,913 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [773121001] [2024-06-21 16:01:21,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:01:21,913 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:01:21,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:01:22,069 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:01:22,070 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:01:22,070 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [773121001] [2024-06-21 16:01:22,070 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [773121001] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:01:22,070 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:01:22,070 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 16:01:22,071 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [471297491] [2024-06-21 16:01:22,071 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:01:22,071 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 16:01:22,071 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:01:22,072 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 16:01:22,072 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-21 16:01:22,118 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 51 [2024-06-21 16:01:22,119 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 73 transitions, 436 flow. Second operand has 6 states, 6 states have (on average 20.666666666666668) internal successors, (124), 6 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:01:22,119 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:01:22,119 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 51 [2024-06-21 16:01:22,119 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:01:22,679 INFO L124 PetriNetUnfolderBase]: 5198/7664 cut-off events. [2024-06-21 16:01:22,679 INFO L125 PetriNetUnfolderBase]: For 17217/17499 co-relation queries the response was YES. [2024-06-21 16:01:22,695 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26018 conditions, 7664 events. 5198/7664 cut-off events. For 17217/17499 co-relation queries the response was YES. Maximal size of possible extension queue 363. Compared 44083 event pairs, 2250 based on Foata normal form. 65/7676 useless extension candidates. Maximal degree in co-relation 25995. Up to 7056 conditions per place. [2024-06-21 16:01:22,720 INFO L140 encePairwiseOnDemand]: 41/51 looper letters, 60 selfloop transitions, 21 changer transitions 0/94 dead transitions. [2024-06-21 16:01:22,721 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 94 transitions, 652 flow [2024-06-21 16:01:22,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-21 16:01:22,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-21 16:01:22,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 139 transitions. [2024-06-21 16:01:22,722 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6813725490196079 [2024-06-21 16:01:22,722 INFO L175 Difference]: Start difference. First operand has 68 places, 73 transitions, 436 flow. Second operand 4 states and 139 transitions. [2024-06-21 16:01:22,722 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 94 transitions, 652 flow [2024-06-21 16:01:22,733 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 94 transitions, 609 flow, removed 15 selfloop flow, removed 1 redundant places. [2024-06-21 16:01:22,734 INFO L231 Difference]: Finished difference. Result has 71 places, 73 transitions, 453 flow [2024-06-21 16:01:22,734 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=393, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=73, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=453, PETRI_PLACES=71, PETRI_TRANSITIONS=73} [2024-06-21 16:01:22,735 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 17 predicate places. [2024-06-21 16:01:22,735 INFO L495 AbstractCegarLoop]: Abstraction has has 71 places, 73 transitions, 453 flow [2024-06-21 16:01:22,735 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 20.666666666666668) internal successors, (124), 6 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:01:22,736 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:01:22,736 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:01:22,736 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-06-21 16:01:22,736 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 16:01:22,736 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:01:22,736 INFO L85 PathProgramCache]: Analyzing trace with hash 458586734, now seen corresponding path program 1 times [2024-06-21 16:01:22,737 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:01:22,737 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [236852580] [2024-06-21 16:01:22,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:01:22,737 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:01:22,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:01:22,985 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:01:22,985 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:01:22,985 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [236852580] [2024-06-21 16:01:22,985 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [236852580] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:01:22,985 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:01:22,986 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 16:01:22,986 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [578718733] [2024-06-21 16:01:22,986 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:01:22,986 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 16:01:22,986 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:01:22,987 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 16:01:22,987 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-21 16:01:23,024 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 51 [2024-06-21 16:01:23,025 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 73 transitions, 453 flow. Second operand has 6 states, 6 states have (on average 20.666666666666668) internal successors, (124), 6 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:01:23,025 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:01:23,025 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 51 [2024-06-21 16:01:23,025 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:01:23,540 INFO L124 PetriNetUnfolderBase]: 4317/6352 cut-off events. [2024-06-21 16:01:23,540 INFO L125 PetriNetUnfolderBase]: For 15952/15988 co-relation queries the response was YES. [2024-06-21 16:01:23,554 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22022 conditions, 6352 events. 4317/6352 cut-off events. For 15952/15988 co-relation queries the response was YES. Maximal size of possible extension queue 301. Compared 36240 event pairs, 2074 based on Foata normal form. 19/6359 useless extension candidates. Maximal degree in co-relation 21997. Up to 5913 conditions per place. [2024-06-21 16:01:23,576 INFO L140 encePairwiseOnDemand]: 42/51 looper letters, 77 selfloop transitions, 14 changer transitions 0/102 dead transitions. [2024-06-21 16:01:23,576 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 102 transitions, 726 flow [2024-06-21 16:01:23,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-21 16:01:23,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-21 16:01:23,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 164 transitions. [2024-06-21 16:01:23,577 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6431372549019608 [2024-06-21 16:01:23,577 INFO L175 Difference]: Start difference. First operand has 71 places, 73 transitions, 453 flow. Second operand 5 states and 164 transitions. [2024-06-21 16:01:23,577 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 102 transitions, 726 flow [2024-06-21 16:01:23,585 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 102 transitions, 684 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-06-21 16:01:23,586 INFO L231 Difference]: Finished difference. Result has 73 places, 76 transitions, 477 flow [2024-06-21 16:01:23,587 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=411, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=73, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=477, PETRI_PLACES=73, PETRI_TRANSITIONS=76} [2024-06-21 16:01:23,587 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 19 predicate places. [2024-06-21 16:01:23,587 INFO L495 AbstractCegarLoop]: Abstraction has has 73 places, 76 transitions, 477 flow [2024-06-21 16:01:23,588 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 20.666666666666668) internal successors, (124), 6 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:01:23,588 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:01:23,588 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:01:23,588 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-06-21 16:01:23,588 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 16:01:23,588 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:01:23,588 INFO L85 PathProgramCache]: Analyzing trace with hash 1080064308, now seen corresponding path program 1 times [2024-06-21 16:01:23,589 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:01:23,589 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [178416413] [2024-06-21 16:01:23,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:01:23,589 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:01:23,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:01:23,724 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:01:23,725 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:01:23,725 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [178416413] [2024-06-21 16:01:23,725 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [178416413] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:01:23,725 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:01:23,725 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 16:01:23,725 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2033013412] [2024-06-21 16:01:23,726 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:01:23,726 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 16:01:23,726 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:01:23,726 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 16:01:23,726 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-21 16:01:23,778 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 51 [2024-06-21 16:01:23,779 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 76 transitions, 477 flow. Second operand has 7 states, 7 states have (on average 19.571428571428573) internal successors, (137), 7 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:01:23,779 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:01:23,779 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 51 [2024-06-21 16:01:23,779 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:01:24,273 INFO L124 PetriNetUnfolderBase]: 5487/8007 cut-off events. [2024-06-21 16:01:24,273 INFO L125 PetriNetUnfolderBase]: For 24555/24726 co-relation queries the response was YES. [2024-06-21 16:01:24,293 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28817 conditions, 8007 events. 5487/8007 cut-off events. For 24555/24726 co-relation queries the response was YES. Maximal size of possible extension queue 356. Compared 45383 event pairs, 2351 based on Foata normal form. 40/8023 useless extension candidates. Maximal degree in co-relation 28791. Up to 7366 conditions per place. [2024-06-21 16:01:24,324 INFO L140 encePairwiseOnDemand]: 40/51 looper letters, 96 selfloop transitions, 27 changer transitions 0/133 dead transitions. [2024-06-21 16:01:24,325 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 133 transitions, 993 flow [2024-06-21 16:01:24,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 16:01:24,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 16:01:24,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 199 transitions. [2024-06-21 16:01:24,326 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6503267973856209 [2024-06-21 16:01:24,326 INFO L175 Difference]: Start difference. First operand has 73 places, 76 transitions, 477 flow. Second operand 6 states and 199 transitions. [2024-06-21 16:01:24,326 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 133 transitions, 993 flow [2024-06-21 16:01:24,339 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 133 transitions, 953 flow, removed 8 selfloop flow, removed 3 redundant places. [2024-06-21 16:01:24,340 INFO L231 Difference]: Finished difference. Result has 78 places, 93 transitions, 665 flow [2024-06-21 16:01:24,340 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=437, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=76, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=665, PETRI_PLACES=78, PETRI_TRANSITIONS=93} [2024-06-21 16:01:24,341 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 24 predicate places. [2024-06-21 16:01:24,341 INFO L495 AbstractCegarLoop]: Abstraction has has 78 places, 93 transitions, 665 flow [2024-06-21 16:01:24,341 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.571428571428573) internal successors, (137), 7 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:01:24,341 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:01:24,341 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:01:24,342 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-06-21 16:01:24,342 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 16:01:24,342 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:01:24,342 INFO L85 PathProgramCache]: Analyzing trace with hash 1427875008, now seen corresponding path program 2 times [2024-06-21 16:01:24,342 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:01:24,342 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1595791223] [2024-06-21 16:01:24,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:01:24,343 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:01:24,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:01:24,497 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:01:24,497 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:01:24,498 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1595791223] [2024-06-21 16:01:24,498 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1595791223] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:01:24,498 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:01:24,498 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 16:01:24,498 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [592005080] [2024-06-21 16:01:24,498 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:01:24,498 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 16:01:24,499 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:01:24,499 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 16:01:24,499 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-21 16:01:24,551 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 51 [2024-06-21 16:01:24,551 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 93 transitions, 665 flow. Second operand has 7 states, 7 states have (on average 19.571428571428573) internal successors, (137), 7 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:01:24,551 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:01:24,552 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 51 [2024-06-21 16:01:24,552 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:01:25,211 INFO L124 PetriNetUnfolderBase]: 5509/8053 cut-off events. [2024-06-21 16:01:25,212 INFO L125 PetriNetUnfolderBase]: For 32033/32350 co-relation queries the response was YES. [2024-06-21 16:01:25,236 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31088 conditions, 8053 events. 5509/8053 cut-off events. For 32033/32350 co-relation queries the response was YES. Maximal size of possible extension queue 357. Compared 45641 event pairs, 2329 based on Foata normal form. 81/8117 useless extension candidates. Maximal degree in co-relation 31059. Up to 7419 conditions per place. [2024-06-21 16:01:25,271 INFO L140 encePairwiseOnDemand]: 40/51 looper letters, 110 selfloop transitions, 26 changer transitions 0/146 dead transitions. [2024-06-21 16:01:25,271 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 84 places, 146 transitions, 1162 flow [2024-06-21 16:01:25,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 16:01:25,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 16:01:25,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 227 transitions. [2024-06-21 16:01:25,273 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6358543417366946 [2024-06-21 16:01:25,273 INFO L175 Difference]: Start difference. First operand has 78 places, 93 transitions, 665 flow. Second operand 7 states and 227 transitions. [2024-06-21 16:01:25,273 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 84 places, 146 transitions, 1162 flow [2024-06-21 16:01:25,296 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 82 places, 146 transitions, 1108 flow, removed 17 selfloop flow, removed 2 redundant places. [2024-06-21 16:01:25,298 INFO L231 Difference]: Finished difference. Result has 84 places, 99 transitions, 741 flow [2024-06-21 16:01:25,298 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=615, PETRI_DIFFERENCE_MINUEND_PLACES=76, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=93, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=72, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=741, PETRI_PLACES=84, PETRI_TRANSITIONS=99} [2024-06-21 16:01:25,299 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 30 predicate places. [2024-06-21 16:01:25,299 INFO L495 AbstractCegarLoop]: Abstraction has has 84 places, 99 transitions, 741 flow [2024-06-21 16:01:25,299 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.571428571428573) internal successors, (137), 7 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:01:25,299 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:01:25,299 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:01:25,300 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-06-21 16:01:25,300 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 16:01:25,300 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:01:25,300 INFO L85 PathProgramCache]: Analyzing trace with hash 1427869428, now seen corresponding path program 3 times [2024-06-21 16:01:25,300 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:01:25,300 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [590929108] [2024-06-21 16:01:25,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:01:25,301 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:01:25,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:01:25,490 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:01:25,490 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:01:25,491 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [590929108] [2024-06-21 16:01:25,491 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [590929108] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:01:25,491 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:01:25,491 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 16:01:25,492 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1132098554] [2024-06-21 16:01:25,492 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:01:25,492 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 16:01:25,492 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:01:25,493 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 16:01:25,494 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-21 16:01:25,544 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 51 [2024-06-21 16:01:25,544 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 84 places, 99 transitions, 741 flow. Second operand has 7 states, 7 states have (on average 19.571428571428573) internal successors, (137), 7 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:01:25,544 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:01:25,544 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 51 [2024-06-21 16:01:25,545 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:01:26,166 INFO L124 PetriNetUnfolderBase]: 5500/8033 cut-off events. [2024-06-21 16:01:26,166 INFO L125 PetriNetUnfolderBase]: For 36437/36676 co-relation queries the response was YES. [2024-06-21 16:01:26,186 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31393 conditions, 8033 events. 5500/8033 cut-off events. For 36437/36676 co-relation queries the response was YES. Maximal size of possible extension queue 356. Compared 45539 event pairs, 2351 based on Foata normal form. 65/8074 useless extension candidates. Maximal degree in co-relation 31362. Up to 7410 conditions per place. [2024-06-21 16:01:26,215 INFO L140 encePairwiseOnDemand]: 40/51 looper letters, 93 selfloop transitions, 25 changer transitions 0/128 dead transitions. [2024-06-21 16:01:26,215 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 88 places, 128 transitions, 1054 flow [2024-06-21 16:01:26,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-21 16:01:26,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-21 16:01:26,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 167 transitions. [2024-06-21 16:01:26,216 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6549019607843137 [2024-06-21 16:01:26,216 INFO L175 Difference]: Start difference. First operand has 84 places, 99 transitions, 741 flow. Second operand 5 states and 167 transitions. [2024-06-21 16:01:26,216 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 88 places, 128 transitions, 1054 flow [2024-06-21 16:01:26,254 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 84 places, 128 transitions, 962 flow, removed 21 selfloop flow, removed 4 redundant places. [2024-06-21 16:01:26,256 INFO L231 Difference]: Finished difference. Result has 85 places, 99 transitions, 710 flow [2024-06-21 16:01:26,256 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=649, PETRI_DIFFERENCE_MINUEND_PLACES=80, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=99, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=74, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=710, PETRI_PLACES=85, PETRI_TRANSITIONS=99} [2024-06-21 16:01:26,257 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 31 predicate places. [2024-06-21 16:01:26,259 INFO L495 AbstractCegarLoop]: Abstraction has has 85 places, 99 transitions, 710 flow [2024-06-21 16:01:26,259 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.571428571428573) internal successors, (137), 7 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:01:26,259 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:01:26,259 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:01:26,259 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-06-21 16:01:26,259 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 16:01:26,260 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:01:26,260 INFO L85 PathProgramCache]: Analyzing trace with hash -763144331, now seen corresponding path program 1 times [2024-06-21 16:01:26,260 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:01:26,260 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1623941256] [2024-06-21 16:01:26,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:01:26,261 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:01:26,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:01:26,386 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:01:26,386 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:01:26,386 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1623941256] [2024-06-21 16:01:26,387 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1623941256] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:01:26,387 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:01:26,387 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-21 16:01:26,387 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [858877781] [2024-06-21 16:01:26,387 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:01:26,387 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-21 16:01:26,388 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:01:26,388 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-21 16:01:26,388 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-21 16:01:26,429 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 51 [2024-06-21 16:01:26,429 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 85 places, 99 transitions, 710 flow. Second operand has 5 states, 5 states have (on average 21.4) internal successors, (107), 5 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:01:26,429 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:01:26,429 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 51 [2024-06-21 16:01:26,430 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:01:26,847 INFO L124 PetriNetUnfolderBase]: 4998/7361 cut-off events. [2024-06-21 16:01:26,848 INFO L125 PetriNetUnfolderBase]: For 40862/40885 co-relation queries the response was YES. [2024-06-21 16:01:26,868 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29608 conditions, 7361 events. 4998/7361 cut-off events. For 40862/40885 co-relation queries the response was YES. Maximal size of possible extension queue 339. Compared 42808 event pairs, 2470 based on Foata normal form. 27/7357 useless extension candidates. Maximal degree in co-relation 29576. Up to 6752 conditions per place. [2024-06-21 16:01:26,893 INFO L140 encePairwiseOnDemand]: 43/51 looper letters, 98 selfloop transitions, 14 changer transitions 0/127 dead transitions. [2024-06-21 16:01:26,893 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 88 places, 127 transitions, 1082 flow [2024-06-21 16:01:26,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-21 16:01:26,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-21 16:01:26,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 130 transitions. [2024-06-21 16:01:26,895 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6372549019607843 [2024-06-21 16:01:26,895 INFO L175 Difference]: Start difference. First operand has 85 places, 99 transitions, 710 flow. Second operand 4 states and 130 transitions. [2024-06-21 16:01:26,895 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 88 places, 127 transitions, 1082 flow [2024-06-21 16:01:26,936 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 84 places, 127 transitions, 1026 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-06-21 16:01:26,940 INFO L231 Difference]: Finished difference. Result has 86 places, 112 transitions, 833 flow [2024-06-21 16:01:26,941 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=660, PETRI_DIFFERENCE_MINUEND_PLACES=81, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=99, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=86, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=833, PETRI_PLACES=86, PETRI_TRANSITIONS=112} [2024-06-21 16:01:26,941 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 32 predicate places. [2024-06-21 16:01:26,941 INFO L495 AbstractCegarLoop]: Abstraction has has 86 places, 112 transitions, 833 flow [2024-06-21 16:01:26,941 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 21.4) internal successors, (107), 5 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:01:26,941 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:01:26,942 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:01:26,942 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-06-21 16:01:26,942 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 16:01:26,942 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:01:26,942 INFO L85 PathProgramCache]: Analyzing trace with hash 960174645, now seen corresponding path program 1 times [2024-06-21 16:01:26,942 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:01:26,942 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1009330525] [2024-06-21 16:01:26,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:01:26,943 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:01:26,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:01:27,111 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:01:27,112 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:01:27,112 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1009330525] [2024-06-21 16:01:27,112 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1009330525] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:01:27,112 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:01:27,112 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 16:01:27,112 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [326228485] [2024-06-21 16:01:27,112 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:01:27,113 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 16:01:27,113 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:01:27,113 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 16:01:27,113 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-21 16:01:27,166 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 51 [2024-06-21 16:01:27,167 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 112 transitions, 833 flow. Second operand has 7 states, 7 states have (on average 20.571428571428573) internal successors, (144), 7 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:01:27,167 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:01:27,167 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 51 [2024-06-21 16:01:27,167 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:01:27,785 INFO L124 PetriNetUnfolderBase]: 6095/8923 cut-off events. [2024-06-21 16:01:27,785 INFO L125 PetriNetUnfolderBase]: For 64984/65217 co-relation queries the response was YES. [2024-06-21 16:01:27,811 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39578 conditions, 8923 events. 6095/8923 cut-off events. For 64984/65217 co-relation queries the response was YES. Maximal size of possible extension queue 423. Compared 52107 event pairs, 1804 based on Foata normal form. 62/8746 useless extension candidates. Maximal degree in co-relation 39544. Up to 7908 conditions per place. [2024-06-21 16:01:27,844 INFO L140 encePairwiseOnDemand]: 41/51 looper letters, 88 selfloop transitions, 49 changer transitions 0/158 dead transitions. [2024-06-21 16:01:27,845 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 91 places, 158 transitions, 1339 flow [2024-06-21 16:01:27,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 16:01:27,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 16:01:27,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 203 transitions. [2024-06-21 16:01:27,846 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6633986928104575 [2024-06-21 16:01:27,846 INFO L175 Difference]: Start difference. First operand has 86 places, 112 transitions, 833 flow. Second operand 6 states and 203 transitions. [2024-06-21 16:01:27,846 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 91 places, 158 transitions, 1339 flow [2024-06-21 16:01:27,910 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 91 places, 158 transitions, 1329 flow, removed 5 selfloop flow, removed 0 redundant places. [2024-06-21 16:01:27,912 INFO L231 Difference]: Finished difference. Result has 92 places, 118 transitions, 1005 flow [2024-06-21 16:01:27,913 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=823, PETRI_DIFFERENCE_MINUEND_PLACES=86, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=112, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1005, PETRI_PLACES=92, PETRI_TRANSITIONS=118} [2024-06-21 16:01:27,913 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 38 predicate places. [2024-06-21 16:01:27,913 INFO L495 AbstractCegarLoop]: Abstraction has has 92 places, 118 transitions, 1005 flow [2024-06-21 16:01:27,913 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 20.571428571428573) internal successors, (144), 7 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:01:27,913 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:01:27,914 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:01:27,914 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-06-21 16:01:27,914 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 16:01:27,914 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:01:27,914 INFO L85 PathProgramCache]: Analyzing trace with hash -877748299, now seen corresponding path program 2 times [2024-06-21 16:01:27,914 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:01:27,914 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1406751328] [2024-06-21 16:01:27,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:01:27,915 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:01:27,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:01:28,064 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:01:28,064 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:01:28,065 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1406751328] [2024-06-21 16:01:28,065 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1406751328] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:01:28,065 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:01:28,065 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 16:01:28,065 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1311688475] [2024-06-21 16:01:28,065 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:01:28,065 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 16:01:28,066 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:01:28,066 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 16:01:28,066 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-21 16:01:28,120 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 51 [2024-06-21 16:01:28,120 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 92 places, 118 transitions, 1005 flow. Second operand has 7 states, 7 states have (on average 20.571428571428573) internal successors, (144), 7 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:01:28,120 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:01:28,121 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 51 [2024-06-21 16:01:28,121 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:01:28,798 INFO L124 PetriNetUnfolderBase]: 6167/9016 cut-off events. [2024-06-21 16:01:28,798 INFO L125 PetriNetUnfolderBase]: For 82163/82469 co-relation queries the response was YES. [2024-06-21 16:01:28,825 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42538 conditions, 9016 events. 6167/9016 cut-off events. For 82163/82469 co-relation queries the response was YES. Maximal size of possible extension queue 424. Compared 52672 event pairs, 2204 based on Foata normal form. 75/8849 useless extension candidates. Maximal degree in co-relation 42501. Up to 8137 conditions per place. [2024-06-21 16:01:28,857 INFO L140 encePairwiseOnDemand]: 41/51 looper letters, 91 selfloop transitions, 45 changer transitions 0/157 dead transitions. [2024-06-21 16:01:28,857 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 97 places, 157 transitions, 1409 flow [2024-06-21 16:01:28,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 16:01:28,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 16:01:28,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 199 transitions. [2024-06-21 16:01:28,859 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6503267973856209 [2024-06-21 16:01:28,859 INFO L175 Difference]: Start difference. First operand has 92 places, 118 transitions, 1005 flow. Second operand 6 states and 199 transitions. [2024-06-21 16:01:28,859 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 97 places, 157 transitions, 1409 flow [2024-06-21 16:01:28,929 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 95 places, 157 transitions, 1325 flow, removed 18 selfloop flow, removed 2 redundant places. [2024-06-21 16:01:28,931 INFO L231 Difference]: Finished difference. Result has 96 places, 121 transitions, 1068 flow [2024-06-21 16:01:28,931 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=927, PETRI_DIFFERENCE_MINUEND_PLACES=90, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=118, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1068, PETRI_PLACES=96, PETRI_TRANSITIONS=121} [2024-06-21 16:01:28,932 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 42 predicate places. [2024-06-21 16:01:28,932 INFO L495 AbstractCegarLoop]: Abstraction has has 96 places, 121 transitions, 1068 flow [2024-06-21 16:01:28,932 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 20.571428571428573) internal successors, (144), 7 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:01:28,932 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:01:28,932 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:01:28,932 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-06-21 16:01:28,932 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 16:01:28,933 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:01:28,933 INFO L85 PathProgramCache]: Analyzing trace with hash 1314275829, now seen corresponding path program 3 times [2024-06-21 16:01:28,933 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:01:28,933 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [646750213] [2024-06-21 16:01:28,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:01:28,933 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:01:28,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:01:29,132 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:01:29,132 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:01:29,132 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [646750213] [2024-06-21 16:01:29,132 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [646750213] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:01:29,132 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:01:29,132 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 16:01:29,133 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2024104593] [2024-06-21 16:01:29,133 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:01:29,133 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 16:01:29,133 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:01:29,133 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 16:01:29,133 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-21 16:01:29,221 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 51 [2024-06-21 16:01:29,222 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 96 places, 121 transitions, 1068 flow. Second operand has 7 states, 7 states have (on average 20.571428571428573) internal successors, (144), 7 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:01:29,222 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:01:29,222 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 51 [2024-06-21 16:01:29,222 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:01:29,863 INFO L124 PetriNetUnfolderBase]: 6133/8979 cut-off events. [2024-06-21 16:01:29,863 INFO L125 PetriNetUnfolderBase]: For 89869/90141 co-relation queries the response was YES. [2024-06-21 16:01:29,893 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42958 conditions, 8979 events. 6133/8979 cut-off events. For 89869/90141 co-relation queries the response was YES. Maximal size of possible extension queue 423. Compared 52379 event pairs, 1794 based on Foata normal form. 108/8850 useless extension candidates. Maximal degree in co-relation 42919. Up to 8052 conditions per place. [2024-06-21 16:01:29,928 INFO L140 encePairwiseOnDemand]: 41/51 looper letters, 88 selfloop transitions, 41 changer transitions 0/150 dead transitions. [2024-06-21 16:01:29,928 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 100 places, 150 transitions, 1400 flow [2024-06-21 16:01:29,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-21 16:01:29,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-21 16:01:29,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 170 transitions. [2024-06-21 16:01:29,929 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6666666666666666 [2024-06-21 16:01:29,929 INFO L175 Difference]: Start difference. First operand has 96 places, 121 transitions, 1068 flow. Second operand 5 states and 170 transitions. [2024-06-21 16:01:29,929 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 100 places, 150 transitions, 1400 flow [2024-06-21 16:01:30,024 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 96 places, 150 transitions, 1283 flow, removed 16 selfloop flow, removed 4 redundant places. [2024-06-21 16:01:30,026 INFO L231 Difference]: Finished difference. Result has 97 places, 121 transitions, 1049 flow [2024-06-21 16:01:30,027 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=951, PETRI_DIFFERENCE_MINUEND_PLACES=92, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=121, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=80, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1049, PETRI_PLACES=97, PETRI_TRANSITIONS=121} [2024-06-21 16:01:30,027 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 43 predicate places. [2024-06-21 16:01:30,027 INFO L495 AbstractCegarLoop]: Abstraction has has 97 places, 121 transitions, 1049 flow [2024-06-21 16:01:30,027 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 20.571428571428573) internal successors, (144), 7 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:01:30,028 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:01:30,028 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:01:30,028 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-06-21 16:01:30,028 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 16:01:30,028 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:01:30,029 INFO L85 PathProgramCache]: Analyzing trace with hash -1528957803, now seen corresponding path program 1 times [2024-06-21 16:01:30,029 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:01:30,029 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1703272904] [2024-06-21 16:01:30,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:01:30,029 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:01:30,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:01:30,188 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:01:30,188 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:01:30,188 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1703272904] [2024-06-21 16:01:30,189 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1703272904] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:01:30,189 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:01:30,189 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 16:01:30,189 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1416375120] [2024-06-21 16:01:30,189 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:01:30,189 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 16:01:30,189 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:01:30,190 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 16:01:30,190 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-21 16:01:30,257 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 51 [2024-06-21 16:01:30,257 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 97 places, 121 transitions, 1049 flow. Second operand has 8 states, 8 states have (on average 19.5) internal successors, (156), 8 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:01:30,257 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:01:30,257 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 51 [2024-06-21 16:01:30,257 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:01:31,073 INFO L124 PetriNetUnfolderBase]: 6715/9772 cut-off events. [2024-06-21 16:01:31,073 INFO L125 PetriNetUnfolderBase]: For 94949/95245 co-relation queries the response was YES. [2024-06-21 16:01:31,105 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45970 conditions, 9772 events. 6715/9772 cut-off events. For 94949/95245 co-relation queries the response was YES. Maximal size of possible extension queue 420. Compared 56618 event pairs, 1908 based on Foata normal form. 117/9841 useless extension candidates. Maximal degree in co-relation 45930. Up to 8482 conditions per place. [2024-06-21 16:01:31,146 INFO L140 encePairwiseOnDemand]: 40/51 looper letters, 133 selfloop transitions, 43 changer transitions 0/188 dead transitions. [2024-06-21 16:01:31,147 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 103 places, 188 transitions, 1759 flow [2024-06-21 16:01:31,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 16:01:31,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 16:01:31,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 233 transitions. [2024-06-21 16:01:31,148 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6526610644257703 [2024-06-21 16:01:31,148 INFO L175 Difference]: Start difference. First operand has 97 places, 121 transitions, 1049 flow. Second operand 7 states and 233 transitions. [2024-06-21 16:01:31,148 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 103 places, 188 transitions, 1759 flow [2024-06-21 16:01:31,237 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 99 places, 188 transitions, 1652 flow, removed 5 selfloop flow, removed 4 redundant places. [2024-06-21 16:01:31,239 INFO L231 Difference]: Finished difference. Result has 102 places, 132 transitions, 1189 flow [2024-06-21 16:01:31,239 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=956, PETRI_DIFFERENCE_MINUEND_PLACES=93, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=121, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=81, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1189, PETRI_PLACES=102, PETRI_TRANSITIONS=132} [2024-06-21 16:01:31,240 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 48 predicate places. [2024-06-21 16:01:31,240 INFO L495 AbstractCegarLoop]: Abstraction has has 102 places, 132 transitions, 1189 flow [2024-06-21 16:01:31,240 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 19.5) internal successors, (156), 8 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:01:31,240 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:01:31,240 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:01:31,241 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-06-21 16:01:31,241 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 16:01:31,241 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:01:31,241 INFO L85 PathProgramCache]: Analyzing trace with hash -1440392043, now seen corresponding path program 2 times [2024-06-21 16:01:31,241 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:01:31,241 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1326673459] [2024-06-21 16:01:31,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:01:31,242 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:01:31,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:01:31,409 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:01:31,410 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:01:31,411 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1326673459] [2024-06-21 16:01:31,424 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1326673459] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:01:31,424 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:01:31,424 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 16:01:31,424 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1458509146] [2024-06-21 16:01:31,424 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:01:31,425 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 16:01:31,425 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:01:31,425 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 16:01:31,425 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-21 16:01:31,493 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 51 [2024-06-21 16:01:31,493 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 102 places, 132 transitions, 1189 flow. Second operand has 8 states, 8 states have (on average 19.5) internal successors, (156), 8 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:01:31,493 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:01:31,494 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 51 [2024-06-21 16:01:31,494 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:01:32,453 INFO L124 PetriNetUnfolderBase]: 6989/10198 cut-off events. [2024-06-21 16:01:32,453 INFO L125 PetriNetUnfolderBase]: For 112749/113103 co-relation queries the response was YES. [2024-06-21 16:01:32,493 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49943 conditions, 10198 events. 6989/10198 cut-off events. For 112749/113103 co-relation queries the response was YES. Maximal size of possible extension queue 432. Compared 59767 event pairs, 2353 based on Foata normal form. 127/10277 useless extension candidates. Maximal degree in co-relation 49900. Up to 9096 conditions per place. [2024-06-21 16:01:32,536 INFO L140 encePairwiseOnDemand]: 40/51 looper letters, 139 selfloop transitions, 39 changer transitions 0/190 dead transitions. [2024-06-21 16:01:32,536 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 108 places, 190 transitions, 1845 flow [2024-06-21 16:01:32,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 16:01:32,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 16:01:32,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 233 transitions. [2024-06-21 16:01:32,538 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6526610644257703 [2024-06-21 16:01:32,538 INFO L175 Difference]: Start difference. First operand has 102 places, 132 transitions, 1189 flow. Second operand 7 states and 233 transitions. [2024-06-21 16:01:32,538 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 108 places, 190 transitions, 1845 flow [2024-06-21 16:01:32,642 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 106 places, 190 transitions, 1786 flow, removed 11 selfloop flow, removed 2 redundant places. [2024-06-21 16:01:32,645 INFO L231 Difference]: Finished difference. Result has 108 places, 137 transitions, 1295 flow [2024-06-21 16:01:32,645 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=1130, PETRI_DIFFERENCE_MINUEND_PLACES=100, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=132, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=95, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1295, PETRI_PLACES=108, PETRI_TRANSITIONS=137} [2024-06-21 16:01:32,645 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 54 predicate places. [2024-06-21 16:01:32,645 INFO L495 AbstractCegarLoop]: Abstraction has has 108 places, 137 transitions, 1295 flow [2024-06-21 16:01:32,646 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 19.5) internal successors, (156), 8 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:01:32,646 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:01:32,646 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:01:32,646 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-06-21 16:01:32,646 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 16:01:32,646 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:01:32,647 INFO L85 PathProgramCache]: Analyzing trace with hash -625968093, now seen corresponding path program 3 times [2024-06-21 16:01:32,647 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:01:32,647 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1475513924] [2024-06-21 16:01:32,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:01:32,647 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:01:32,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:01:32,809 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:01:32,809 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:01:32,809 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1475513924] [2024-06-21 16:01:32,809 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1475513924] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:01:32,810 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:01:32,810 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 16:01:32,810 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1380283926] [2024-06-21 16:01:32,810 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:01:32,810 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 16:01:32,810 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:01:32,811 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 16:01:32,811 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-21 16:01:32,859 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 51 [2024-06-21 16:01:32,860 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 108 places, 137 transitions, 1295 flow. Second operand has 8 states, 8 states have (on average 19.5) internal successors, (156), 8 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:01:32,860 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:01:32,860 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 51 [2024-06-21 16:01:32,860 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:01:33,797 INFO L124 PetriNetUnfolderBase]: 6935/10120 cut-off events. [2024-06-21 16:01:33,797 INFO L125 PetriNetUnfolderBase]: For 122442/122792 co-relation queries the response was YES. [2024-06-21 16:01:33,836 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50414 conditions, 10120 events. 6935/10120 cut-off events. For 122442/122792 co-relation queries the response was YES. Maximal size of possible extension queue 429. Compared 59132 event pairs, 2358 based on Foata normal form. 133/10205 useless extension candidates. Maximal degree in co-relation 50368. Up to 9216 conditions per place. [2024-06-21 16:01:33,881 INFO L140 encePairwiseOnDemand]: 40/51 looper letters, 137 selfloop transitions, 36 changer transitions 0/185 dead transitions. [2024-06-21 16:01:33,881 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 114 places, 185 transitions, 1784 flow [2024-06-21 16:01:33,881 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 16:01:33,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 16:01:33,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 227 transitions. [2024-06-21 16:01:33,882 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6358543417366946 [2024-06-21 16:01:33,882 INFO L175 Difference]: Start difference. First operand has 108 places, 137 transitions, 1295 flow. Second operand 7 states and 227 transitions. [2024-06-21 16:01:33,882 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 114 places, 185 transitions, 1784 flow [2024-06-21 16:01:34,044 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 111 places, 185 transitions, 1715 flow, removed 15 selfloop flow, removed 3 redundant places. [2024-06-21 16:01:34,046 INFO L231 Difference]: Finished difference. Result has 112 places, 138 transitions, 1322 flow [2024-06-21 16:01:34,047 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=1228, PETRI_DIFFERENCE_MINUEND_PLACES=105, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=137, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=101, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1322, PETRI_PLACES=112, PETRI_TRANSITIONS=138} [2024-06-21 16:01:34,047 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 58 predicate places. [2024-06-21 16:01:34,047 INFO L495 AbstractCegarLoop]: Abstraction has has 112 places, 138 transitions, 1322 flow [2024-06-21 16:01:34,047 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 19.5) internal successors, (156), 8 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:01:34,047 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:01:34,048 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:01:34,048 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-06-21 16:01:34,048 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 16:01:34,048 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:01:34,048 INFO L85 PathProgramCache]: Analyzing trace with hash 2093356735, now seen corresponding path program 4 times [2024-06-21 16:01:34,048 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:01:34,048 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [987486708] [2024-06-21 16:01:34,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:01:34,049 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:01:34,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:01:34,239 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:01:34,239 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:01:34,239 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [987486708] [2024-06-21 16:01:34,239 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [987486708] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:01:34,240 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:01:34,240 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 16:01:34,240 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1060462997] [2024-06-21 16:01:34,240 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:01:34,240 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 16:01:34,240 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:01:34,241 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 16:01:34,241 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-21 16:01:34,331 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 51 [2024-06-21 16:01:34,332 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 112 places, 138 transitions, 1322 flow. Second operand has 8 states, 8 states have (on average 19.5) internal successors, (156), 8 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:01:34,332 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:01:34,332 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 51 [2024-06-21 16:01:34,332 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:01:35,281 INFO L124 PetriNetUnfolderBase]: 6968/10191 cut-off events. [2024-06-21 16:01:35,281 INFO L125 PetriNetUnfolderBase]: For 131117/131479 co-relation queries the response was YES. [2024-06-21 16:01:35,321 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51080 conditions, 10191 events. 6968/10191 cut-off events. For 131117/131479 co-relation queries the response was YES. Maximal size of possible extension queue 424. Compared 59612 event pairs, 2338 based on Foata normal form. 142/10295 useless extension candidates. Maximal degree in co-relation 51032. Up to 9310 conditions per place. [2024-06-21 16:01:35,361 INFO L140 encePairwiseOnDemand]: 40/51 looper letters, 152 selfloop transitions, 31 changer transitions 0/195 dead transitions. [2024-06-21 16:01:35,361 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 119 places, 195 transitions, 1873 flow [2024-06-21 16:01:35,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:01:35,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:01:35,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 255 transitions. [2024-06-21 16:01:35,363 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.625 [2024-06-21 16:01:35,363 INFO L175 Difference]: Start difference. First operand has 112 places, 138 transitions, 1322 flow. Second operand 8 states and 255 transitions. [2024-06-21 16:01:35,363 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 119 places, 195 transitions, 1873 flow [2024-06-21 16:01:35,509 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 114 places, 195 transitions, 1801 flow, removed 2 selfloop flow, removed 5 redundant places. [2024-06-21 16:01:35,511 INFO L231 Difference]: Finished difference. Result has 115 places, 140 transitions, 1360 flow [2024-06-21 16:01:35,511 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=1250, PETRI_DIFFERENCE_MINUEND_PLACES=107, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=138, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=107, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1360, PETRI_PLACES=115, PETRI_TRANSITIONS=140} [2024-06-21 16:01:35,512 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 61 predicate places. [2024-06-21 16:01:35,512 INFO L495 AbstractCegarLoop]: Abstraction has has 115 places, 140 transitions, 1360 flow [2024-06-21 16:01:35,512 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 19.5) internal successors, (156), 8 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:01:35,512 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:01:35,512 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:01:35,512 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-06-21 16:01:35,512 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 16:01:35,513 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:01:35,513 INFO L85 PathProgramCache]: Analyzing trace with hash 2087850205, now seen corresponding path program 5 times [2024-06-21 16:01:35,513 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:01:35,513 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1525373033] [2024-06-21 16:01:35,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:01:35,513 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:01:35,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:01:35,693 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:01:35,694 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:01:35,694 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1525373033] [2024-06-21 16:01:35,694 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1525373033] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:01:35,694 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:01:35,694 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 16:01:35,694 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [257534910] [2024-06-21 16:01:35,694 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:01:35,695 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 16:01:35,695 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:01:35,695 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 16:01:35,695 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-21 16:01:35,755 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 51 [2024-06-21 16:01:35,756 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 115 places, 140 transitions, 1360 flow. Second operand has 8 states, 8 states have (on average 19.5) internal successors, (156), 8 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:01:35,756 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:01:35,756 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 51 [2024-06-21 16:01:35,756 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:01:36,633 INFO L124 PetriNetUnfolderBase]: 7114/10415 cut-off events. [2024-06-21 16:01:36,633 INFO L125 PetriNetUnfolderBase]: For 145226/145580 co-relation queries the response was YES. [2024-06-21 16:01:36,675 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53030 conditions, 10415 events. 7114/10415 cut-off events. For 145226/145580 co-relation queries the response was YES. Maximal size of possible extension queue 432. Compared 61253 event pairs, 2394 based on Foata normal form. 127/10496 useless extension candidates. Maximal degree in co-relation 52981. Up to 9523 conditions per place. [2024-06-21 16:01:36,716 INFO L140 encePairwiseOnDemand]: 40/51 looper letters, 141 selfloop transitions, 29 changer transitions 0/182 dead transitions. [2024-06-21 16:01:36,716 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 120 places, 182 transitions, 1851 flow [2024-06-21 16:01:36,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 16:01:36,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 16:01:36,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 198 transitions. [2024-06-21 16:01:36,717 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6470588235294118 [2024-06-21 16:01:36,717 INFO L175 Difference]: Start difference. First operand has 115 places, 140 transitions, 1360 flow. Second operand 6 states and 198 transitions. [2024-06-21 16:01:36,717 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 120 places, 182 transitions, 1851 flow [2024-06-21 16:01:36,895 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 114 places, 182 transitions, 1779 flow, removed 7 selfloop flow, removed 6 redundant places. [2024-06-21 16:01:36,898 INFO L231 Difference]: Finished difference. Result has 115 places, 142 transitions, 1398 flow [2024-06-21 16:01:36,898 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=1288, PETRI_DIFFERENCE_MINUEND_PLACES=109, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=140, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=111, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1398, PETRI_PLACES=115, PETRI_TRANSITIONS=142} [2024-06-21 16:01:36,899 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 61 predicate places. [2024-06-21 16:01:36,899 INFO L495 AbstractCegarLoop]: Abstraction has has 115 places, 142 transitions, 1398 flow [2024-06-21 16:01:36,899 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 19.5) internal successors, (156), 8 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:01:36,899 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:01:36,899 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:01:36,899 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-06-21 16:01:36,900 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 16:01:36,900 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:01:36,900 INFO L85 PathProgramCache]: Analyzing trace with hash 2087846485, now seen corresponding path program 6 times [2024-06-21 16:01:36,900 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:01:36,900 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [968313712] [2024-06-21 16:01:36,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:01:36,901 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:01:36,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:01:37,092 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:01:37,092 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:01:37,092 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [968313712] [2024-06-21 16:01:37,092 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [968313712] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:01:37,092 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:01:37,092 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 16:01:37,093 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1959979276] [2024-06-21 16:01:37,093 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:01:37,093 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 16:01:37,093 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:01:37,094 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 16:01:37,094 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-21 16:01:37,205 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 51 [2024-06-21 16:01:37,205 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 115 places, 142 transitions, 1398 flow. Second operand has 8 states, 8 states have (on average 19.5) internal successors, (156), 8 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:01:37,205 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:01:37,205 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 51 [2024-06-21 16:01:37,205 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:01:38,088 INFO L124 PetriNetUnfolderBase]: 7075/10354 cut-off events. [2024-06-21 16:01:38,089 INFO L125 PetriNetUnfolderBase]: For 152801/153157 co-relation queries the response was YES. [2024-06-21 16:01:38,130 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52976 conditions, 10354 events. 7075/10354 cut-off events. For 152801/153157 co-relation queries the response was YES. Maximal size of possible extension queue 428. Compared 60771 event pairs, 1958 based on Foata normal form. 141/10449 useless extension candidates. Maximal degree in co-relation 52926. Up to 9116 conditions per place. [2024-06-21 16:01:38,171 INFO L140 encePairwiseOnDemand]: 40/51 looper letters, 138 selfloop transitions, 37 changer transitions 0/187 dead transitions. [2024-06-21 16:01:38,172 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 120 places, 187 transitions, 1891 flow [2024-06-21 16:01:38,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 16:01:38,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 16:01:38,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 201 transitions. [2024-06-21 16:01:38,173 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6568627450980392 [2024-06-21 16:01:38,173 INFO L175 Difference]: Start difference. First operand has 115 places, 142 transitions, 1398 flow. Second operand 6 states and 201 transitions. [2024-06-21 16:01:38,173 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 120 places, 187 transitions, 1891 flow [2024-06-21 16:01:38,366 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 116 places, 187 transitions, 1809 flow, removed 14 selfloop flow, removed 4 redundant places. [2024-06-21 16:01:38,368 INFO L231 Difference]: Finished difference. Result has 118 places, 144 transitions, 1436 flow [2024-06-21 16:01:38,369 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=1318, PETRI_DIFFERENCE_MINUEND_PLACES=111, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=142, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=106, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1436, PETRI_PLACES=118, PETRI_TRANSITIONS=144} [2024-06-21 16:01:38,369 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 64 predicate places. [2024-06-21 16:01:38,369 INFO L495 AbstractCegarLoop]: Abstraction has has 118 places, 144 transitions, 1436 flow [2024-06-21 16:01:38,369 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 19.5) internal successors, (156), 8 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:01:38,369 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:01:38,370 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:01:38,370 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-06-21 16:01:38,370 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 16:01:38,370 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:01:38,370 INFO L85 PathProgramCache]: Analyzing trace with hash 2093571937, now seen corresponding path program 1 times [2024-06-21 16:01:38,370 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:01:38,370 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [744163487] [2024-06-21 16:01:38,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:01:38,371 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:01:38,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:01:38,533 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:01:38,533 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:01:38,533 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [744163487] [2024-06-21 16:01:38,533 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [744163487] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:01:38,533 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:01:38,534 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 16:01:38,534 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [206469210] [2024-06-21 16:01:38,534 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:01:38,534 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 16:01:38,534 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:01:38,534 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 16:01:38,535 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-21 16:01:38,628 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 51 [2024-06-21 16:01:38,628 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 118 places, 144 transitions, 1436 flow. Second operand has 8 states, 8 states have (on average 19.5) internal successors, (156), 8 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:01:38,628 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:01:38,628 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 51 [2024-06-21 16:01:38,628 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:01:39,506 INFO L124 PetriNetUnfolderBase]: 6967/10208 cut-off events. [2024-06-21 16:01:39,507 INFO L125 PetriNetUnfolderBase]: For 159710/160054 co-relation queries the response was YES. [2024-06-21 16:01:39,552 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52527 conditions, 10208 events. 6967/10208 cut-off events. For 159710/160054 co-relation queries the response was YES. Maximal size of possible extension queue 419. Compared 59815 event pairs, 2179 based on Foata normal form. 144/10314 useless extension candidates. Maximal degree in co-relation 52475. Up to 8973 conditions per place. [2024-06-21 16:01:39,591 INFO L140 encePairwiseOnDemand]: 40/51 looper letters, 154 selfloop transitions, 38 changer transitions 0/204 dead transitions. [2024-06-21 16:01:39,592 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 124 places, 204 transitions, 1973 flow [2024-06-21 16:01:39,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:01:39,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:01:39,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 257 transitions. [2024-06-21 16:01:39,593 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6299019607843137 [2024-06-21 16:01:39,593 INFO L175 Difference]: Start difference. First operand has 118 places, 144 transitions, 1436 flow. Second operand 8 states and 257 transitions. [2024-06-21 16:01:39,593 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 124 places, 204 transitions, 1973 flow [2024-06-21 16:01:39,827 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 119 places, 204 transitions, 1838 flow, removed 12 selfloop flow, removed 5 redundant places. [2024-06-21 16:01:39,829 INFO L231 Difference]: Finished difference. Result has 120 places, 145 transitions, 1376 flow [2024-06-21 16:01:39,830 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=1261, PETRI_DIFFERENCE_MINUEND_PLACES=112, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=143, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=105, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1376, PETRI_PLACES=120, PETRI_TRANSITIONS=145} [2024-06-21 16:01:39,830 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 66 predicate places. [2024-06-21 16:01:39,830 INFO L495 AbstractCegarLoop]: Abstraction has has 120 places, 145 transitions, 1376 flow [2024-06-21 16:01:39,830 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 19.5) internal successors, (156), 8 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:01:39,830 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:01:39,830 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:01:39,831 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-06-21 16:01:39,831 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 16:01:39,831 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:01:39,831 INFO L85 PathProgramCache]: Analyzing trace with hash -211475054, now seen corresponding path program 1 times [2024-06-21 16:01:39,831 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:01:39,831 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [997834054] [2024-06-21 16:01:39,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:01:39,832 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:01:39,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:01:39,943 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:01:39,944 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:01:39,944 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [997834054] [2024-06-21 16:01:39,944 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [997834054] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:01:39,944 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:01:39,944 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 16:01:39,944 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [365358800] [2024-06-21 16:01:39,944 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:01:39,944 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 16:01:39,945 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:01:39,945 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 16:01:39,945 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-21 16:01:39,996 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 51 [2024-06-21 16:01:39,996 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 120 places, 145 transitions, 1376 flow. Second operand has 6 states, 6 states have (on average 21.166666666666668) internal successors, (127), 6 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:01:39,996 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:01:39,996 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 51 [2024-06-21 16:01:39,997 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:01:40,724 INFO L124 PetriNetUnfolderBase]: 5676/8388 cut-off events. [2024-06-21 16:01:40,732 INFO L125 PetriNetUnfolderBase]: For 138569/138811 co-relation queries the response was YES. [2024-06-21 16:01:40,765 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44550 conditions, 8388 events. 5676/8388 cut-off events. For 138569/138811 co-relation queries the response was YES. Maximal size of possible extension queue 362. Compared 49270 event pairs, 2029 based on Foata normal form. 32/8394 useless extension candidates. Maximal degree in co-relation 44498. Up to 7824 conditions per place. [2024-06-21 16:01:40,798 INFO L140 encePairwiseOnDemand]: 42/51 looper letters, 130 selfloop transitions, 33 changer transitions 0/176 dead transitions. [2024-06-21 16:01:40,798 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 124 places, 176 transitions, 1944 flow [2024-06-21 16:01:40,798 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-21 16:01:40,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-21 16:01:40,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 163 transitions. [2024-06-21 16:01:40,800 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6392156862745098 [2024-06-21 16:01:40,800 INFO L175 Difference]: Start difference. First operand has 120 places, 145 transitions, 1376 flow. Second operand 5 states and 163 transitions. [2024-06-21 16:01:40,800 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 124 places, 176 transitions, 1944 flow [2024-06-21 16:01:40,927 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 118 places, 176 transitions, 1855 flow, removed 8 selfloop flow, removed 6 redundant places. [2024-06-21 16:01:40,929 INFO L231 Difference]: Finished difference. Result has 119 places, 153 transitions, 1470 flow [2024-06-21 16:01:40,952 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=1287, PETRI_DIFFERENCE_MINUEND_PLACES=114, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=145, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=116, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1470, PETRI_PLACES=119, PETRI_TRANSITIONS=153} [2024-06-21 16:01:40,952 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 65 predicate places. [2024-06-21 16:01:40,952 INFO L495 AbstractCegarLoop]: Abstraction has has 119 places, 153 transitions, 1470 flow [2024-06-21 16:01:40,953 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 21.166666666666668) internal successors, (127), 6 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:01:40,953 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:01:40,953 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:01:40,953 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-06-21 16:01:40,953 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 16:01:40,953 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:01:40,954 INFO L85 PathProgramCache]: Analyzing trace with hash -210490184, now seen corresponding path program 2 times [2024-06-21 16:01:40,954 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:01:40,954 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1062364385] [2024-06-21 16:01:40,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:01:40,954 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:01:40,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:01:41,107 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:01:41,107 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:01:41,107 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1062364385] [2024-06-21 16:01:41,107 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1062364385] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:01:41,108 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:01:41,108 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 16:01:41,108 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [361221673] [2024-06-21 16:01:41,108 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:01:41,110 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 16:01:41,110 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:01:41,110 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 16:01:41,110 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-21 16:01:41,160 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 51 [2024-06-21 16:01:41,160 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 119 places, 153 transitions, 1470 flow. Second operand has 6 states, 6 states have (on average 21.166666666666668) internal successors, (127), 6 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:01:41,160 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:01:41,160 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 51 [2024-06-21 16:01:41,160 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:01:41,842 INFO L124 PetriNetUnfolderBase]: 5669/8371 cut-off events. [2024-06-21 16:01:41,842 INFO L125 PetriNetUnfolderBase]: For 154303/154559 co-relation queries the response was YES. [2024-06-21 16:01:41,877 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46122 conditions, 8371 events. 5669/8371 cut-off events. For 154303/154559 co-relation queries the response was YES. Maximal size of possible extension queue 362. Compared 49122 event pairs, 2029 based on Foata normal form. 34/8380 useless extension candidates. Maximal degree in co-relation 46069. Up to 7826 conditions per place. [2024-06-21 16:01:41,910 INFO L140 encePairwiseOnDemand]: 42/51 looper letters, 128 selfloop transitions, 29 changer transitions 0/170 dead transitions. [2024-06-21 16:01:41,911 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 122 places, 170 transitions, 1828 flow [2024-06-21 16:01:41,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-21 16:01:41,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-21 16:01:41,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 134 transitions. [2024-06-21 16:01:41,912 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6568627450980392 [2024-06-21 16:01:41,912 INFO L175 Difference]: Start difference. First operand has 119 places, 153 transitions, 1470 flow. Second operand 4 states and 134 transitions. [2024-06-21 16:01:41,912 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 122 places, 170 transitions, 1828 flow [2024-06-21 16:01:42,086 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 121 places, 170 transitions, 1735 flow, removed 36 selfloop flow, removed 1 redundant places. [2024-06-21 16:01:42,088 INFO L231 Difference]: Finished difference. Result has 122 places, 153 transitions, 1451 flow [2024-06-21 16:01:42,088 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=1377, PETRI_DIFFERENCE_MINUEND_PLACES=118, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=153, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=124, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=1451, PETRI_PLACES=122, PETRI_TRANSITIONS=153} [2024-06-21 16:01:42,088 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 68 predicate places. [2024-06-21 16:01:42,089 INFO L495 AbstractCegarLoop]: Abstraction has has 122 places, 153 transitions, 1451 flow [2024-06-21 16:01:42,089 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 21.166666666666668) internal successors, (127), 6 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:01:42,089 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:01:42,089 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:01:42,089 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-06-21 16:01:42,089 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 16:01:42,089 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:01:42,090 INFO L85 PathProgramCache]: Analyzing trace with hash 1999758960, now seen corresponding path program 1 times [2024-06-21 16:01:42,090 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:01:42,090 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [152271863] [2024-06-21 16:01:42,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:01:42,090 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:01:42,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:01:42,228 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:01:42,228 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:01:42,228 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [152271863] [2024-06-21 16:01:42,228 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [152271863] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:01:42,228 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:01:42,228 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 16:01:42,228 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [735948900] [2024-06-21 16:01:42,229 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:01:42,229 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 16:01:42,229 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:01:42,229 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 16:01:42,229 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-21 16:01:42,278 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 51 [2024-06-21 16:01:42,278 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 122 places, 153 transitions, 1451 flow. Second operand has 6 states, 6 states have (on average 21.166666666666668) internal successors, (127), 6 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:01:42,278 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:01:42,278 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 51 [2024-06-21 16:01:42,278 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:01:43,041 INFO L124 PetriNetUnfolderBase]: 5840/8643 cut-off events. [2024-06-21 16:01:43,041 INFO L125 PetriNetUnfolderBase]: For 160704/160759 co-relation queries the response was YES. [2024-06-21 16:01:43,079 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45627 conditions, 8643 events. 5840/8643 cut-off events. For 160704/160759 co-relation queries the response was YES. Maximal size of possible extension queue 391. Compared 51313 event pairs, 2282 based on Foata normal form. 63/8679 useless extension candidates. Maximal degree in co-relation 45572. Up to 7977 conditions per place. [2024-06-21 16:01:43,113 INFO L140 encePairwiseOnDemand]: 43/51 looper letters, 143 selfloop transitions, 17 changer transitions 0/176 dead transitions. [2024-06-21 16:01:43,114 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 126 places, 176 transitions, 1851 flow [2024-06-21 16:01:43,114 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-21 16:01:43,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-21 16:01:43,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 156 transitions. [2024-06-21 16:01:43,115 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.611764705882353 [2024-06-21 16:01:43,115 INFO L175 Difference]: Start difference. First operand has 122 places, 153 transitions, 1451 flow. Second operand 5 states and 156 transitions. [2024-06-21 16:01:43,115 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 126 places, 176 transitions, 1851 flow [2024-06-21 16:01:43,274 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 123 places, 176 transitions, 1793 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-06-21 16:01:43,276 INFO L231 Difference]: Finished difference. Result has 124 places, 156 transitions, 1467 flow [2024-06-21 16:01:43,277 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=1393, PETRI_DIFFERENCE_MINUEND_PLACES=119, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=153, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=136, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1467, PETRI_PLACES=124, PETRI_TRANSITIONS=156} [2024-06-21 16:01:43,277 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 70 predicate places. [2024-06-21 16:01:43,277 INFO L495 AbstractCegarLoop]: Abstraction has has 124 places, 156 transitions, 1467 flow [2024-06-21 16:01:43,277 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 21.166666666666668) internal successors, (127), 6 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:01:43,277 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:01:43,277 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:01:43,278 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-06-21 16:01:43,278 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 16:01:43,278 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:01:43,278 INFO L85 PathProgramCache]: Analyzing trace with hash -2144125132, now seen corresponding path program 1 times [2024-06-21 16:01:43,278 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:01:43,278 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1270233556] [2024-06-21 16:01:43,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:01:43,278 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:01:43,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:01:43,420 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:01:43,421 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:01:43,421 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1270233556] [2024-06-21 16:01:43,421 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1270233556] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:01:43,421 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:01:43,421 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 16:01:43,421 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2127594250] [2024-06-21 16:01:43,421 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:01:43,421 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 16:01:43,422 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:01:43,422 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 16:01:43,422 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-21 16:01:43,465 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 51 [2024-06-21 16:01:43,465 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 124 places, 156 transitions, 1467 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) [2024-06-21 16:01:43,465 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:01:43,465 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 51 [2024-06-21 16:01:43,465 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:01:44,398 INFO L124 PetriNetUnfolderBase]: 7463/10908 cut-off events. [2024-06-21 16:01:44,399 INFO L125 PetriNetUnfolderBase]: For 207787/207797 co-relation queries the response was YES. [2024-06-21 16:01:44,451 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57860 conditions, 10908 events. 7463/10908 cut-off events. For 207787/207797 co-relation queries the response was YES. Maximal size of possible extension queue 441. Compared 63724 event pairs, 2649 based on Foata normal form. 10/10913 useless extension candidates. Maximal degree in co-relation 57804. Up to 10181 conditions per place. [2024-06-21 16:01:44,494 INFO L140 encePairwiseOnDemand]: 41/51 looper letters, 177 selfloop transitions, 26 changer transitions 0/212 dead transitions. [2024-06-21 16:01:44,494 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 129 places, 212 transitions, 2255 flow [2024-06-21 16:01:44,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 16:01:44,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 16:01:44,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 185 transitions. [2024-06-21 16:01:44,495 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6045751633986928 [2024-06-21 16:01:44,495 INFO L175 Difference]: Start difference. First operand has 124 places, 156 transitions, 1467 flow. Second operand 6 states and 185 transitions. [2024-06-21 16:01:44,496 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 129 places, 212 transitions, 2255 flow [2024-06-21 16:01:44,804 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 126 places, 212 transitions, 2198 flow, removed 10 selfloop flow, removed 3 redundant places. [2024-06-21 16:01:44,806 INFO L231 Difference]: Finished difference. Result has 130 places, 179 transitions, 1720 flow [2024-06-21 16:01:44,806 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=1417, PETRI_DIFFERENCE_MINUEND_PLACES=121, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=156, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=138, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1720, PETRI_PLACES=130, PETRI_TRANSITIONS=179} [2024-06-21 16:01:44,807 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 76 predicate places. [2024-06-21 16:01:44,807 INFO L495 AbstractCegarLoop]: Abstraction has has 130 places, 179 transitions, 1720 flow [2024-06-21 16:01:44,807 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) [2024-06-21 16:01:44,807 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:01:44,808 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:01:44,808 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-06-21 16:01:44,808 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 16:01:44,808 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:01:44,808 INFO L85 PathProgramCache]: Analyzing trace with hash 3712110, now seen corresponding path program 2 times [2024-06-21 16:01:44,808 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:01:44,808 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [297643344] [2024-06-21 16:01:44,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:01:44,809 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:01:44,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:01:44,949 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:01:44,949 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:01:44,949 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [297643344] [2024-06-21 16:01:44,949 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [297643344] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:01:44,949 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:01:44,950 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 16:01:44,950 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1511536287] [2024-06-21 16:01:44,950 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:01:44,950 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 16:01:44,950 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:01:44,950 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 16:01:44,951 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-21 16:01:44,988 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 51 [2024-06-21 16:01:44,989 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 130 places, 179 transitions, 1720 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) [2024-06-21 16:01:44,989 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:01:44,989 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 51 [2024-06-21 16:01:44,989 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:01:45,919 INFO L124 PetriNetUnfolderBase]: 7479/10932 cut-off events. [2024-06-21 16:01:45,920 INFO L125 PetriNetUnfolderBase]: For 226157/226173 co-relation queries the response was YES. [2024-06-21 16:01:45,973 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60283 conditions, 10932 events. 7479/10932 cut-off events. For 226157/226173 co-relation queries the response was YES. Maximal size of possible extension queue 441. Compared 63918 event pairs, 2654 based on Foata normal form. 9/10937 useless extension candidates. Maximal degree in co-relation 60223. Up to 10198 conditions per place. [2024-06-21 16:01:46,017 INFO L140 encePairwiseOnDemand]: 42/51 looper letters, 169 selfloop transitions, 30 changer transitions 0/208 dead transitions. [2024-06-21 16:01:46,018 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 134 places, 208 transitions, 2334 flow [2024-06-21 16:01:46,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-21 16:01:46,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-21 16:01:46,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 154 transitions. [2024-06-21 16:01:46,018 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6039215686274509 [2024-06-21 16:01:46,019 INFO L175 Difference]: Start difference. First operand has 130 places, 179 transitions, 1720 flow. Second operand 5 states and 154 transitions. [2024-06-21 16:01:46,019 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 134 places, 208 transitions, 2334 flow [2024-06-21 16:01:46,277 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 134 places, 208 transitions, 2302 flow, removed 16 selfloop flow, removed 0 redundant places. [2024-06-21 16:01:46,279 INFO L231 Difference]: Finished difference. Result has 136 places, 185 transitions, 1829 flow [2024-06-21 16:01:46,279 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=1692, PETRI_DIFFERENCE_MINUEND_PLACES=130, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=179, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=154, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1829, PETRI_PLACES=136, PETRI_TRANSITIONS=185} [2024-06-21 16:01:46,280 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 82 predicate places. [2024-06-21 16:01:46,280 INFO L495 AbstractCegarLoop]: Abstraction has has 136 places, 185 transitions, 1829 flow [2024-06-21 16:01:46,280 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) [2024-06-21 16:01:46,280 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:01:46,280 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:01:46,280 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-06-21 16:01:46,281 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 16:01:46,281 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:01:46,281 INFO L85 PathProgramCache]: Analyzing trace with hash 3700950, now seen corresponding path program 3 times [2024-06-21 16:01:46,281 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:01:46,282 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [159812464] [2024-06-21 16:01:46,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:01:46,282 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:01:46,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:01:46,419 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:01:46,420 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:01:46,420 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [159812464] [2024-06-21 16:01:46,420 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [159812464] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:01:46,420 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:01:46,420 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 16:01:46,420 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1094303546] [2024-06-21 16:01:46,420 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:01:46,421 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 16:01:46,421 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:01:46,421 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 16:01:46,421 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-21 16:01:46,465 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 51 [2024-06-21 16:01:46,465 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 136 places, 185 transitions, 1829 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) [2024-06-21 16:01:46,465 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:01:46,465 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 51 [2024-06-21 16:01:46,466 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:01:47,430 INFO L124 PetriNetUnfolderBase]: 7472/10925 cut-off events. [2024-06-21 16:01:47,430 INFO L125 PetriNetUnfolderBase]: For 241100/241120 co-relation queries the response was YES. [2024-06-21 16:01:47,492 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61037 conditions, 10925 events. 7472/10925 cut-off events. For 241100/241120 co-relation queries the response was YES. Maximal size of possible extension queue 441. Compared 63760 event pairs, 2649 based on Foata normal form. 18/10938 useless extension candidates. Maximal degree in co-relation 60973. Up to 10191 conditions per place. [2024-06-21 16:01:47,538 INFO L140 encePairwiseOnDemand]: 42/51 looper letters, 171 selfloop transitions, 31 changer transitions 0/211 dead transitions. [2024-06-21 16:01:47,539 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 140 places, 211 transitions, 2303 flow [2024-06-21 16:01:47,539 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-21 16:01:47,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-21 16:01:47,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 158 transitions. [2024-06-21 16:01:47,540 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6196078431372549 [2024-06-21 16:01:47,540 INFO L175 Difference]: Start difference. First operand has 136 places, 185 transitions, 1829 flow. Second operand 5 states and 158 transitions. [2024-06-21 16:01:47,540 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 140 places, 211 transitions, 2303 flow [2024-06-21 16:01:47,880 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 139 places, 211 transitions, 2243 flow, removed 17 selfloop flow, removed 1 redundant places. [2024-06-21 16:01:47,883 INFO L231 Difference]: Finished difference. Result has 140 places, 185 transitions, 1845 flow [2024-06-21 16:01:47,883 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=1769, PETRI_DIFFERENCE_MINUEND_PLACES=135, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=185, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=154, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1845, PETRI_PLACES=140, PETRI_TRANSITIONS=185} [2024-06-21 16:01:47,884 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 86 predicate places. [2024-06-21 16:01:47,884 INFO L495 AbstractCegarLoop]: Abstraction has has 140 places, 185 transitions, 1845 flow [2024-06-21 16:01:47,884 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) [2024-06-21 16:01:47,884 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:01:47,884 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:01:47,884 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2024-06-21 16:01:47,884 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 16:01:47,885 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:01:47,885 INFO L85 PathProgramCache]: Analyzing trace with hash -936754310, now seen corresponding path program 1 times [2024-06-21 16:01:47,885 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:01:47,885 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1444346107] [2024-06-21 16:01:47,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:01:47,885 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:01:47,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:01:48,046 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:01:48,046 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:01:48,046 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1444346107] [2024-06-21 16:01:48,046 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1444346107] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:01:48,046 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:01:48,046 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 16:01:48,047 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [67010999] [2024-06-21 16:01:48,047 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:01:48,047 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 16:01:48,047 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:01:48,047 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 16:01:48,047 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-21 16:01:48,084 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 51 [2024-06-21 16:01:48,084 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 140 places, 185 transitions, 1845 flow. Second operand has 7 states, 7 states have (on average 20.0) internal successors, (140), 7 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:01:48,084 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:01:48,084 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 51 [2024-06-21 16:01:48,084 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:01:48,923 INFO L124 PetriNetUnfolderBase]: 6148/8990 cut-off events. [2024-06-21 16:01:48,923 INFO L125 PetriNetUnfolderBase]: For 216254/216258 co-relation queries the response was YES. [2024-06-21 16:01:48,969 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51951 conditions, 8990 events. 6148/8990 cut-off events. For 216254/216258 co-relation queries the response was YES. Maximal size of possible extension queue 388. Compared 51752 event pairs, 2307 based on Foata normal form. 6/8992 useless extension candidates. Maximal degree in co-relation 51885. Up to 8422 conditions per place. [2024-06-21 16:01:49,006 INFO L140 encePairwiseOnDemand]: 41/51 looper letters, 188 selfloop transitions, 33 changer transitions 0/231 dead transitions. [2024-06-21 16:01:49,007 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 145 places, 231 transitions, 2616 flow [2024-06-21 16:01:49,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 16:01:49,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 16:01:49,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 187 transitions. [2024-06-21 16:01:49,008 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6111111111111112 [2024-06-21 16:01:49,008 INFO L175 Difference]: Start difference. First operand has 140 places, 185 transitions, 1845 flow. Second operand 6 states and 187 transitions. [2024-06-21 16:01:49,008 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 145 places, 231 transitions, 2616 flow [2024-06-21 16:01:49,255 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 142 places, 231 transitions, 2568 flow, removed 4 selfloop flow, removed 3 redundant places. [2024-06-21 16:01:49,258 INFO L231 Difference]: Finished difference. Result has 145 places, 202 transitions, 2059 flow [2024-06-21 16:01:49,258 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=1801, PETRI_DIFFERENCE_MINUEND_PLACES=137, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=185, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=157, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2059, PETRI_PLACES=145, PETRI_TRANSITIONS=202} [2024-06-21 16:01:49,259 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 91 predicate places. [2024-06-21 16:01:49,259 INFO L495 AbstractCegarLoop]: Abstraction has has 145 places, 202 transitions, 2059 flow [2024-06-21 16:01:49,259 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 20.0) internal successors, (140), 7 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:01:49,259 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:01:49,259 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:01:49,259 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2024-06-21 16:01:49,259 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 16:01:49,259 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:01:49,260 INFO L85 PathProgramCache]: Analyzing trace with hash 2064740794, now seen corresponding path program 2 times [2024-06-21 16:01:49,260 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:01:49,260 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [989120522] [2024-06-21 16:01:49,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:01:49,260 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:01:49,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:01:49,401 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:01:49,401 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:01:49,401 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [989120522] [2024-06-21 16:01:49,402 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [989120522] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:01:49,402 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:01:49,402 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 16:01:49,402 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2075623471] [2024-06-21 16:01:49,402 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:01:49,402 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 16:01:49,403 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:01:49,403 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 16:01:49,403 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-21 16:01:49,455 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 51 [2024-06-21 16:01:49,455 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 145 places, 202 transitions, 2059 flow. Second operand has 7 states, 7 states have (on average 20.0) internal successors, (140), 7 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:01:49,455 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:01:49,455 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 51 [2024-06-21 16:01:49,455 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:01:50,366 INFO L124 PetriNetUnfolderBase]: 6164/9016 cut-off events. [2024-06-21 16:01:50,367 INFO L125 PetriNetUnfolderBase]: For 221429/221435 co-relation queries the response was YES. [2024-06-21 16:01:50,418 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53712 conditions, 9016 events. 6164/9016 cut-off events. For 221429/221435 co-relation queries the response was YES. Maximal size of possible extension queue 388. Compared 51950 event pairs, 2307 based on Foata normal form. 8/9020 useless extension candidates. Maximal degree in co-relation 53644. Up to 8457 conditions per place. [2024-06-21 16:01:50,457 INFO L140 encePairwiseOnDemand]: 41/51 looper letters, 191 selfloop transitions, 30 changer transitions 0/231 dead transitions. [2024-06-21 16:01:50,457 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 149 places, 231 transitions, 2726 flow [2024-06-21 16:01:50,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-21 16:01:50,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-21 16:01:50,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 161 transitions. [2024-06-21 16:01:50,458 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6313725490196078 [2024-06-21 16:01:50,458 INFO L175 Difference]: Start difference. First operand has 145 places, 202 transitions, 2059 flow. Second operand 5 states and 161 transitions. [2024-06-21 16:01:50,458 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 149 places, 231 transitions, 2726 flow [2024-06-21 16:01:50,734 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 147 places, 231 transitions, 2646 flow, removed 24 selfloop flow, removed 2 redundant places. [2024-06-21 16:01:50,737 INFO L231 Difference]: Finished difference. Result has 149 places, 207 transitions, 2116 flow [2024-06-21 16:01:50,737 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=1985, PETRI_DIFFERENCE_MINUEND_PLACES=143, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=202, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=176, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=2116, PETRI_PLACES=149, PETRI_TRANSITIONS=207} [2024-06-21 16:01:50,738 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 95 predicate places. [2024-06-21 16:01:50,738 INFO L495 AbstractCegarLoop]: Abstraction has has 149 places, 207 transitions, 2116 flow [2024-06-21 16:01:50,738 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 20.0) internal successors, (140), 7 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:01:50,738 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:01:50,739 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:01:50,739 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2024-06-21 16:01:50,739 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 16:01:50,739 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:01:50,739 INFO L85 PathProgramCache]: Analyzing trace with hash 2064746374, now seen corresponding path program 3 times [2024-06-21 16:01:50,739 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:01:50,739 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2023444828] [2024-06-21 16:01:50,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:01:50,740 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:01:50,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:01:50,879 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:01:50,879 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:01:50,879 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2023444828] [2024-06-21 16:01:50,879 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2023444828] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:01:50,880 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:01:50,880 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 16:01:50,880 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1393438801] [2024-06-21 16:01:50,880 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:01:50,880 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 16:01:50,880 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:01:50,881 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 16:01:50,881 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-21 16:01:50,923 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 51 [2024-06-21 16:01:50,924 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 149 places, 207 transitions, 2116 flow. Second operand has 7 states, 7 states have (on average 20.0) internal successors, (140), 7 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:01:50,924 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:01:50,924 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 51 [2024-06-21 16:01:50,924 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:01:51,833 INFO L124 PetriNetUnfolderBase]: 6157/9008 cut-off events. [2024-06-21 16:01:51,833 INFO L125 PetriNetUnfolderBase]: For 233071/233079 co-relation queries the response was YES. [2024-06-21 16:01:51,890 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53823 conditions, 9008 events. 6157/9008 cut-off events. For 233071/233079 co-relation queries the response was YES. Maximal size of possible extension queue 388. Compared 51964 event pairs, 2299 based on Foata normal form. 10/9015 useless extension candidates. Maximal degree in co-relation 53753. Up to 8450 conditions per place. [2024-06-21 16:01:51,938 INFO L140 encePairwiseOnDemand]: 41/51 looper letters, 195 selfloop transitions, 33 changer transitions 0/238 dead transitions. [2024-06-21 16:01:51,938 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 155 places, 238 transitions, 2662 flow [2024-06-21 16:01:51,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 16:01:51,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 16:01:51,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 210 transitions. [2024-06-21 16:01:51,939 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5882352941176471 [2024-06-21 16:01:51,939 INFO L175 Difference]: Start difference. First operand has 149 places, 207 transitions, 2116 flow. Second operand 7 states and 210 transitions. [2024-06-21 16:01:51,940 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 155 places, 238 transitions, 2662 flow [2024-06-21 16:01:52,284 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 152 places, 238 transitions, 2566 flow, removed 18 selfloop flow, removed 3 redundant places. [2024-06-21 16:01:52,287 INFO L231 Difference]: Finished difference. Result has 153 places, 208 transitions, 2105 flow [2024-06-21 16:01:52,287 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=2024, PETRI_DIFFERENCE_MINUEND_PLACES=146, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=207, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=175, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2105, PETRI_PLACES=153, PETRI_TRANSITIONS=208} [2024-06-21 16:01:52,288 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 99 predicate places. [2024-06-21 16:01:52,288 INFO L495 AbstractCegarLoop]: Abstraction has has 153 places, 208 transitions, 2105 flow [2024-06-21 16:01:52,288 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 20.0) internal successors, (140), 7 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:01:52,288 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:01:52,288 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:01:52,288 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2024-06-21 16:01:52,288 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 16:01:52,289 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:01:52,289 INFO L85 PathProgramCache]: Analyzing trace with hash 1689405949, now seen corresponding path program 1 times [2024-06-21 16:01:52,289 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:01:52,289 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1342739793] [2024-06-21 16:01:52,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:01:52,289 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:01:52,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:01:52,397 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:01:52,398 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:01:52,398 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1342739793] [2024-06-21 16:01:52,398 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1342739793] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:01:52,398 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:01:52,398 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-21 16:01:52,398 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [444908561] [2024-06-21 16:01:52,398 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:01:52,398 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-21 16:01:52,399 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:01:52,399 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-21 16:01:52,399 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-21 16:01:52,434 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 51 [2024-06-21 16:01:52,435 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 153 places, 208 transitions, 2105 flow. Second operand has 5 states, 5 states have (on average 22.0) internal successors, (110), 5 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:01:52,435 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:01:52,435 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 51 [2024-06-21 16:01:52,435 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:01:53,415 INFO L124 PetriNetUnfolderBase]: 6897/10157 cut-off events. [2024-06-21 16:01:53,415 INFO L125 PetriNetUnfolderBase]: For 318619/318786 co-relation queries the response was YES. [2024-06-21 16:01:53,478 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62405 conditions, 10157 events. 6897/10157 cut-off events. For 318619/318786 co-relation queries the response was YES. Maximal size of possible extension queue 446. Compared 60290 event pairs, 2392 based on Foata normal form. 45/9977 useless extension candidates. Maximal degree in co-relation 62334. Up to 9062 conditions per place. [2024-06-21 16:01:53,524 INFO L140 encePairwiseOnDemand]: 44/51 looper letters, 176 selfloop transitions, 18 changer transitions 0/238 dead transitions. [2024-06-21 16:01:53,524 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 156 places, 238 transitions, 2743 flow [2024-06-21 16:01:53,524 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-21 16:01:53,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-21 16:01:53,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 125 transitions. [2024-06-21 16:01:53,525 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6127450980392157 [2024-06-21 16:01:53,525 INFO L175 Difference]: Start difference. First operand has 153 places, 208 transitions, 2105 flow. Second operand 4 states and 125 transitions. [2024-06-21 16:01:53,525 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 156 places, 238 transitions, 2743 flow [2024-06-21 16:01:53,857 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 151 places, 238 transitions, 2655 flow, removed 5 selfloop flow, removed 5 redundant places. [2024-06-21 16:01:53,860 INFO L231 Difference]: Finished difference. Result has 153 places, 225 transitions, 2314 flow [2024-06-21 16:01:53,860 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=2029, PETRI_DIFFERENCE_MINUEND_PLACES=148, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=208, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=191, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=2314, PETRI_PLACES=153, PETRI_TRANSITIONS=225} [2024-06-21 16:01:53,861 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 99 predicate places. [2024-06-21 16:01:53,861 INFO L495 AbstractCegarLoop]: Abstraction has has 153 places, 225 transitions, 2314 flow [2024-06-21 16:01:53,861 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 22.0) internal successors, (110), 5 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:01:53,861 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:01:53,861 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:01:53,861 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2024-06-21 16:01:53,861 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 16:01:53,862 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:01:53,862 INFO L85 PathProgramCache]: Analyzing trace with hash 244224183, now seen corresponding path program 1 times [2024-06-21 16:01:53,862 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:01:53,862 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [982402993] [2024-06-21 16:01:53,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:01:53,862 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:01:53,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:01:54,002 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:01:54,003 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:01:54,003 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [982402993] [2024-06-21 16:01:54,003 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [982402993] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:01:54,003 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:01:54,003 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 16:01:54,003 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2020861038] [2024-06-21 16:01:54,004 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:01:54,004 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 16:01:54,004 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:01:54,004 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 16:01:54,004 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-21 16:01:54,060 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 51 [2024-06-21 16:01:54,061 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 153 places, 225 transitions, 2314 flow. Second operand has 7 states, 7 states have (on average 21.0) internal successors, (147), 7 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:01:54,061 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:01:54,061 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 51 [2024-06-21 16:01:54,061 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:01:55,100 INFO L124 PetriNetUnfolderBase]: 6790/10087 cut-off events. [2024-06-21 16:01:55,100 INFO L125 PetriNetUnfolderBase]: For 343108/343678 co-relation queries the response was YES. [2024-06-21 16:01:55,163 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65955 conditions, 10087 events. 6790/10087 cut-off events. For 343108/343678 co-relation queries the response was YES. Maximal size of possible extension queue 451. Compared 60430 event pairs, 2033 based on Foata normal form. 73/9793 useless extension candidates. Maximal degree in co-relation 65882. Up to 8986 conditions per place. [2024-06-21 16:01:55,206 INFO L140 encePairwiseOnDemand]: 42/51 looper letters, 174 selfloop transitions, 61 changer transitions 0/263 dead transitions. [2024-06-21 16:01:55,207 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 158 places, 263 transitions, 3094 flow [2024-06-21 16:01:55,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 16:01:55,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 16:01:55,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 194 transitions. [2024-06-21 16:01:55,207 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6339869281045751 [2024-06-21 16:01:55,208 INFO L175 Difference]: Start difference. First operand has 153 places, 225 transitions, 2314 flow. Second operand 6 states and 194 transitions. [2024-06-21 16:01:55,208 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 158 places, 263 transitions, 3094 flow [2024-06-21 16:01:55,604 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 158 places, 263 transitions, 3074 flow, removed 10 selfloop flow, removed 0 redundant places. [2024-06-21 16:01:55,607 INFO L231 Difference]: Finished difference. Result has 159 places, 231 transitions, 2542 flow [2024-06-21 16:01:55,607 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=2294, PETRI_DIFFERENCE_MINUEND_PLACES=153, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=225, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=58, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=167, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2542, PETRI_PLACES=159, PETRI_TRANSITIONS=231} [2024-06-21 16:01:55,607 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 105 predicate places. [2024-06-21 16:01:55,608 INFO L495 AbstractCegarLoop]: Abstraction has has 159 places, 231 transitions, 2542 flow [2024-06-21 16:01:55,608 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 21.0) internal successors, (147), 7 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:01:55,608 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:01:55,608 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:01:55,608 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2024-06-21 16:01:55,608 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 16:01:55,609 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:01:55,609 INFO L85 PathProgramCache]: Analyzing trace with hash 247081143, now seen corresponding path program 2 times [2024-06-21 16:01:55,609 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:01:55,609 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [812760081] [2024-06-21 16:01:55,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:01:55,609 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:01:55,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:01:55,783 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:01:55,784 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:01:55,784 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [812760081] [2024-06-21 16:01:55,784 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [812760081] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:01:55,784 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:01:55,784 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 16:01:55,785 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1333712926] [2024-06-21 16:01:55,785 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:01:55,785 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 16:01:55,785 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:01:55,786 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 16:01:55,786 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-21 16:01:55,838 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 51 [2024-06-21 16:01:55,838 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 159 places, 231 transitions, 2542 flow. Second operand has 7 states, 7 states have (on average 21.0) internal successors, (147), 7 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:01:55,839 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:01:55,839 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 51 [2024-06-21 16:01:55,839 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:01:56,889 INFO L124 PetriNetUnfolderBase]: 6833/10150 cut-off events. [2024-06-21 16:01:56,889 INFO L125 PetriNetUnfolderBase]: For 373165/373803 co-relation queries the response was YES. [2024-06-21 16:01:56,953 INFO L83 FinitePrefix]: Finished finitePrefix Result has 68476 conditions, 10150 events. 6833/10150 cut-off events. For 373165/373803 co-relation queries the response was YES. Maximal size of possible extension queue 452. Compared 60935 event pairs, 2203 based on Foata normal form. 58/9833 useless extension candidates. Maximal degree in co-relation 68400. Up to 9189 conditions per place. [2024-06-21 16:01:57,000 INFO L140 encePairwiseOnDemand]: 42/51 looper letters, 175 selfloop transitions, 57 changer transitions 0/260 dead transitions. [2024-06-21 16:01:57,000 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 164 places, 260 transitions, 3134 flow [2024-06-21 16:01:57,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 16:01:57,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 16:01:57,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 188 transitions. [2024-06-21 16:01:57,001 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6143790849673203 [2024-06-21 16:01:57,001 INFO L175 Difference]: Start difference. First operand has 159 places, 231 transitions, 2542 flow. Second operand 6 states and 188 transitions. [2024-06-21 16:01:57,001 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 164 places, 260 transitions, 3134 flow [2024-06-21 16:01:57,491 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 162 places, 260 transitions, 2992 flow, removed 41 selfloop flow, removed 2 redundant places. [2024-06-21 16:01:57,494 INFO L231 Difference]: Finished difference. Result has 163 places, 234 transitions, 2591 flow [2024-06-21 16:01:57,495 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=2418, PETRI_DIFFERENCE_MINUEND_PLACES=157, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=231, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=54, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=174, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2591, PETRI_PLACES=163, PETRI_TRANSITIONS=234} [2024-06-21 16:01:57,495 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 109 predicate places. [2024-06-21 16:01:57,495 INFO L495 AbstractCegarLoop]: Abstraction has has 163 places, 234 transitions, 2591 flow [2024-06-21 16:01:57,495 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 21.0) internal successors, (147), 7 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:01:57,495 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:01:57,495 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:01:57,495 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2024-06-21 16:01:57,496 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 16:01:57,496 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:01:57,496 INFO L85 PathProgramCache]: Analyzing trace with hash -417547849, now seen corresponding path program 3 times [2024-06-21 16:01:57,496 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:01:57,496 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2052048719] [2024-06-21 16:01:57,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:01:57,496 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:01:57,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:01:57,646 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:01:57,646 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:01:57,646 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2052048719] [2024-06-21 16:01:57,646 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2052048719] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:01:57,646 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:01:57,647 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 16:01:57,647 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1355041951] [2024-06-21 16:01:57,647 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:01:57,647 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 16:01:57,647 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:01:57,647 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 16:01:57,648 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-21 16:01:57,712 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 51 [2024-06-21 16:01:57,713 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 163 places, 234 transitions, 2591 flow. Second operand has 7 states, 7 states have (on average 21.0) internal successors, (147), 7 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:01:57,713 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:01:57,713 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 51 [2024-06-21 16:01:57,713 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:01:58,831 INFO L124 PetriNetUnfolderBase]: 6808/10117 cut-off events. [2024-06-21 16:01:58,831 INFO L125 PetriNetUnfolderBase]: For 387415/388045 co-relation queries the response was YES. [2024-06-21 16:01:58,900 INFO L83 FinitePrefix]: Finished finitePrefix Result has 68334 conditions, 10117 events. 6808/10117 cut-off events. For 387415/388045 co-relation queries the response was YES. Maximal size of possible extension queue 449. Compared 60573 event pairs, 2023 based on Foata normal form. 84/9830 useless extension candidates. Maximal degree in co-relation 68256. Up to 9116 conditions per place. [2024-06-21 16:01:58,945 INFO L140 encePairwiseOnDemand]: 42/51 looper letters, 178 selfloop transitions, 53 changer transitions 0/259 dead transitions. [2024-06-21 16:01:58,946 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 167 places, 259 transitions, 3117 flow [2024-06-21 16:01:58,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-21 16:01:58,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-21 16:01:58,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 165 transitions. [2024-06-21 16:01:58,947 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6470588235294118 [2024-06-21 16:01:58,947 INFO L175 Difference]: Start difference. First operand has 163 places, 234 transitions, 2591 flow. Second operand 5 states and 165 transitions. [2024-06-21 16:01:58,947 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 167 places, 259 transitions, 3117 flow [2024-06-21 16:01:59,594 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 163 places, 259 transitions, 2956 flow, removed 26 selfloop flow, removed 4 redundant places. [2024-06-21 16:01:59,597 INFO L231 Difference]: Finished difference. Result has 164 places, 234 transitions, 2550 flow [2024-06-21 16:01:59,597 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=2430, PETRI_DIFFERENCE_MINUEND_PLACES=159, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=234, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=181, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=2550, PETRI_PLACES=164, PETRI_TRANSITIONS=234} [2024-06-21 16:01:59,597 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 110 predicate places. [2024-06-21 16:01:59,598 INFO L495 AbstractCegarLoop]: Abstraction has has 164 places, 234 transitions, 2550 flow [2024-06-21 16:01:59,598 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 21.0) internal successors, (147), 7 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:01:59,598 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:01:59,598 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:01:59,598 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2024-06-21 16:01:59,598 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 16:01:59,599 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:01:59,599 INFO L85 PathProgramCache]: Analyzing trace with hash 1483325819, now seen corresponding path program 1 times [2024-06-21 16:01:59,599 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:01:59,599 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [834281139] [2024-06-21 16:01:59,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:01:59,599 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:01:59,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:01:59,765 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:01:59,765 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:01:59,765 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [834281139] [2024-06-21 16:01:59,765 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [834281139] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:01:59,765 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:01:59,766 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 16:01:59,766 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1677141515] [2024-06-21 16:01:59,766 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:01:59,766 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 16:01:59,767 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:01:59,767 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 16:01:59,767 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2024-06-21 16:01:59,825 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 51 [2024-06-21 16:01:59,825 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 164 places, 234 transitions, 2550 flow. Second operand has 8 states, 8 states have (on average 19.875) internal successors, (159), 8 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:01:59,826 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:01:59,826 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 51 [2024-06-21 16:01:59,826 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:02:00,969 INFO L124 PetriNetUnfolderBase]: 7307/10733 cut-off events. [2024-06-21 16:02:00,970 INFO L125 PetriNetUnfolderBase]: For 405443/406269 co-relation queries the response was YES. [2024-06-21 16:02:01,033 INFO L83 FinitePrefix]: Finished finitePrefix Result has 71258 conditions, 10733 events. 7307/10733 cut-off events. For 405443/406269 co-relation queries the response was YES. Maximal size of possible extension queue 464. Compared 63826 event pairs, 2253 based on Foata normal form. 123/10438 useless extension candidates. Maximal degree in co-relation 71179. Up to 9459 conditions per place. [2024-06-21 16:02:01,083 INFO L140 encePairwiseOnDemand]: 40/51 looper letters, 171 selfloop transitions, 93 changer transitions 0/289 dead transitions. [2024-06-21 16:02:01,083 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 170 places, 289 transitions, 3640 flow [2024-06-21 16:02:01,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 16:02:01,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 16:02:01,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 228 transitions. [2024-06-21 16:02:01,084 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6386554621848739 [2024-06-21 16:02:01,084 INFO L175 Difference]: Start difference. First operand has 164 places, 234 transitions, 2550 flow. Second operand 7 states and 228 transitions. [2024-06-21 16:02:01,084 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 170 places, 289 transitions, 3640 flow [2024-06-21 16:02:01,556 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 166 places, 289 transitions, 3523 flow, removed 3 selfloop flow, removed 4 redundant places. [2024-06-21 16:02:01,559 INFO L231 Difference]: Finished difference. Result has 167 places, 246 transitions, 2828 flow [2024-06-21 16:02:01,559 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=2433, PETRI_DIFFERENCE_MINUEND_PLACES=160, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=234, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=85, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=149, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2828, PETRI_PLACES=167, PETRI_TRANSITIONS=246} [2024-06-21 16:02:01,560 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 113 predicate places. [2024-06-21 16:02:01,560 INFO L495 AbstractCegarLoop]: Abstraction has has 167 places, 246 transitions, 2828 flow [2024-06-21 16:02:01,560 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 19.875) internal successors, (159), 8 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:02:01,560 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:02:01,560 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:02:01,560 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2024-06-21 16:02:01,561 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 16:02:01,561 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:02:01,561 INFO L85 PathProgramCache]: Analyzing trace with hash 1483445975, now seen corresponding path program 1 times [2024-06-21 16:02:01,561 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:02:01,561 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1875814687] [2024-06-21 16:02:01,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:02:01,561 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:02:01,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:02:01,703 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:02:01,703 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:02:01,703 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1875814687] [2024-06-21 16:02:01,703 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1875814687] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:02:01,703 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:02:01,704 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 16:02:01,704 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1382845819] [2024-06-21 16:02:01,704 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:02:01,704 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 16:02:01,704 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:02:01,704 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 16:02:01,705 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2024-06-21 16:02:01,755 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 51 [2024-06-21 16:02:01,755 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 167 places, 246 transitions, 2828 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) [2024-06-21 16:02:01,755 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:02:01,755 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 51 [2024-06-21 16:02:01,755 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:02:02,921 INFO L124 PetriNetUnfolderBase]: 7736/11316 cut-off events. [2024-06-21 16:02:02,921 INFO L125 PetriNetUnfolderBase]: For 392948/392980 co-relation queries the response was YES. [2024-06-21 16:02:02,990 INFO L83 FinitePrefix]: Finished finitePrefix Result has 72992 conditions, 11316 events. 7736/11316 cut-off events. For 392948/392980 co-relation queries the response was YES. Maximal size of possible extension queue 440. Compared 66408 event pairs, 2556 based on Foata normal form. 30/11342 useless extension candidates. Maximal degree in co-relation 72912. Up to 10323 conditions per place. [2024-06-21 16:02:03,039 INFO L140 encePairwiseOnDemand]: 40/51 looper letters, 244 selfloop transitions, 63 changer transitions 0/316 dead transitions. [2024-06-21 16:02:03,039 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 173 places, 316 transitions, 4116 flow [2024-06-21 16:02:03,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 16:02:03,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 16:02:03,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 219 transitions. [2024-06-21 16:02:03,040 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6134453781512605 [2024-06-21 16:02:03,040 INFO L175 Difference]: Start difference. First operand has 167 places, 246 transitions, 2828 flow. Second operand 7 states and 219 transitions. [2024-06-21 16:02:03,040 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 173 places, 316 transitions, 4116 flow [2024-06-21 16:02:03,581 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 171 places, 316 transitions, 3970 flow, removed 41 selfloop flow, removed 2 redundant places. [2024-06-21 16:02:03,585 INFO L231 Difference]: Finished difference. Result has 175 places, 271 transitions, 3166 flow [2024-06-21 16:02:03,585 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=2690, PETRI_DIFFERENCE_MINUEND_PLACES=165, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=246, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=194, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3166, PETRI_PLACES=175, PETRI_TRANSITIONS=271} [2024-06-21 16:02:03,586 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 121 predicate places. [2024-06-21 16:02:03,586 INFO L495 AbstractCegarLoop]: Abstraction has has 175 places, 271 transitions, 3166 flow [2024-06-21 16:02:03,586 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) [2024-06-21 16:02:03,586 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:02:03,586 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:02:03,587 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2024-06-21 16:02:03,587 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 16:02:03,587 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:02:03,587 INFO L85 PathProgramCache]: Analyzing trace with hash -255980241, now seen corresponding path program 2 times [2024-06-21 16:02:03,587 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:02:03,587 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [915089321] [2024-06-21 16:02:03,587 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:02:03,588 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:02:03,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:02:03,740 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:02:03,740 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:02:03,740 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [915089321] [2024-06-21 16:02:03,740 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [915089321] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:02:03,740 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:02:03,740 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 16:02:03,741 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [443071361] [2024-06-21 16:02:03,741 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:02:03,741 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 16:02:03,741 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:02:03,741 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 16:02:03,741 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-21 16:02:03,804 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 51 [2024-06-21 16:02:03,804 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 175 places, 271 transitions, 3166 flow. Second operand has 8 states, 8 states have (on average 19.875) internal successors, (159), 8 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:02:03,804 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:02:03,805 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 51 [2024-06-21 16:02:03,805 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:02:05,088 INFO L124 PetriNetUnfolderBase]: 7379/10849 cut-off events. [2024-06-21 16:02:05,088 INFO L125 PetriNetUnfolderBase]: For 468696/469896 co-relation queries the response was YES. [2024-06-21 16:02:05,155 INFO L83 FinitePrefix]: Finished finitePrefix Result has 76813 conditions, 10849 events. 7379/10849 cut-off events. For 468696/469896 co-relation queries the response was YES. Maximal size of possible extension queue 463. Compared 64711 event pairs, 2208 based on Foata normal form. 68/10529 useless extension candidates. Maximal degree in co-relation 76728. Up to 9742 conditions per place. [2024-06-21 16:02:05,204 INFO L140 encePairwiseOnDemand]: 40/51 looper letters, 202 selfloop transitions, 83 changer transitions 0/314 dead transitions. [2024-06-21 16:02:05,205 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 181 places, 314 transitions, 3919 flow [2024-06-21 16:02:05,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 16:02:05,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 16:02:05,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 218 transitions. [2024-06-21 16:02:05,206 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6106442577030813 [2024-06-21 16:02:05,206 INFO L175 Difference]: Start difference. First operand has 175 places, 271 transitions, 3166 flow. Second operand 7 states and 218 transitions. [2024-06-21 16:02:05,206 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 181 places, 314 transitions, 3919 flow [2024-06-21 16:02:05,983 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 180 places, 314 transitions, 3843 flow, removed 29 selfloop flow, removed 1 redundant places. [2024-06-21 16:02:05,987 INFO L231 Difference]: Finished difference. Result has 181 places, 279 transitions, 3367 flow [2024-06-21 16:02:05,987 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=3090, PETRI_DIFFERENCE_MINUEND_PLACES=174, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=271, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=75, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=192, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3367, PETRI_PLACES=181, PETRI_TRANSITIONS=279} [2024-06-21 16:02:05,988 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 127 predicate places. [2024-06-21 16:02:05,988 INFO L495 AbstractCegarLoop]: Abstraction has has 181 places, 279 transitions, 3367 flow [2024-06-21 16:02:05,988 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 19.875) internal successors, (159), 8 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:02:05,988 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:02:05,988 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:02:05,988 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2024-06-21 16:02:05,989 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 16:02:05,989 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:02:05,989 INFO L85 PathProgramCache]: Analyzing trace with hash 1660814645, now seen corresponding path program 2 times [2024-06-21 16:02:05,989 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:02:05,989 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1850914979] [2024-06-21 16:02:05,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:02:05,989 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:02:05,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:02:06,130 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:02:06,130 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:02:06,130 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1850914979] [2024-06-21 16:02:06,131 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1850914979] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:02:06,131 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:02:06,131 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 16:02:06,131 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1567739620] [2024-06-21 16:02:06,131 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:02:06,131 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 16:02:06,131 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:02:06,132 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 16:02:06,132 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2024-06-21 16:02:06,182 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 51 [2024-06-21 16:02:06,183 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 181 places, 279 transitions, 3367 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) [2024-06-21 16:02:06,183 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:02:06,183 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 51 [2024-06-21 16:02:06,183 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:02:07,543 INFO L124 PetriNetUnfolderBase]: 7860/11493 cut-off events. [2024-06-21 16:02:07,543 INFO L125 PetriNetUnfolderBase]: For 444228/444263 co-relation queries the response was YES. [2024-06-21 16:02:07,618 INFO L83 FinitePrefix]: Finished finitePrefix Result has 77636 conditions, 11493 events. 7860/11493 cut-off events. For 444228/444263 co-relation queries the response was YES. Maximal size of possible extension queue 440. Compared 67412 event pairs, 2556 based on Foata normal form. 33/11522 useless extension candidates. Maximal degree in co-relation 77549. Up to 10451 conditions per place. [2024-06-21 16:02:07,676 INFO L140 encePairwiseOnDemand]: 40/51 looper letters, 251 selfloop transitions, 81 changer transitions 0/341 dead transitions. [2024-06-21 16:02:07,676 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 187 places, 341 transitions, 4689 flow [2024-06-21 16:02:07,677 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 16:02:07,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 16:02:07,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 216 transitions. [2024-06-21 16:02:07,678 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6050420168067226 [2024-06-21 16:02:07,678 INFO L175 Difference]: Start difference. First operand has 181 places, 279 transitions, 3367 flow. Second operand 7 states and 216 transitions. [2024-06-21 16:02:07,678 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 187 places, 341 transitions, 4689 flow [2024-06-21 16:02:08,518 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 183 places, 341 transitions, 4473 flow, removed 22 selfloop flow, removed 4 redundant places. [2024-06-21 16:02:08,522 INFO L231 Difference]: Finished difference. Result has 186 places, 300 transitions, 3632 flow [2024-06-21 16:02:08,522 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=3171, PETRI_DIFFERENCE_MINUEND_PLACES=177, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=279, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=60, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=216, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3632, PETRI_PLACES=186, PETRI_TRANSITIONS=300} [2024-06-21 16:02:08,523 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 132 predicate places. [2024-06-21 16:02:08,523 INFO L495 AbstractCegarLoop]: Abstraction has has 186 places, 300 transitions, 3632 flow [2024-06-21 16:02:08,523 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) [2024-06-21 16:02:08,523 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:02:08,523 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:02:08,523 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2024-06-21 16:02:08,523 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 16:02:08,524 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:02:08,524 INFO L85 PathProgramCache]: Analyzing trace with hash 1488087419, now seen corresponding path program 3 times [2024-06-21 16:02:08,524 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:02:08,524 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [838017976] [2024-06-21 16:02:08,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:02:08,524 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:02:08,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:02:08,673 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:02:08,673 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:02:08,673 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [838017976] [2024-06-21 16:02:08,673 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [838017976] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:02:08,673 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:02:08,673 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 16:02:08,674 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [73255165] [2024-06-21 16:02:08,674 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:02:08,674 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 16:02:08,674 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:02:08,674 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 16:02:08,674 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-21 16:02:08,725 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 51 [2024-06-21 16:02:08,726 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 186 places, 300 transitions, 3632 flow. Second operand has 8 states, 8 states have (on average 19.875) internal successors, (159), 8 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:02:08,726 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:02:08,726 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 51 [2024-06-21 16:02:08,726 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:02:10,185 INFO L124 PetriNetUnfolderBase]: 7530/11075 cut-off events. [2024-06-21 16:02:10,186 INFO L125 PetriNetUnfolderBase]: For 521368/522540 co-relation queries the response was YES. [2024-06-21 16:02:10,252 INFO L83 FinitePrefix]: Finished finitePrefix Result has 80258 conditions, 11075 events. 7530/11075 cut-off events. For 521368/522540 co-relation queries the response was YES. Maximal size of possible extension queue 464. Compared 66201 event pairs, 2209 based on Foata normal form. 70/10758 useless extension candidates. Maximal degree in co-relation 80168. Up to 9888 conditions per place. [2024-06-21 16:02:10,303 INFO L140 encePairwiseOnDemand]: 40/51 looper letters, 216 selfloop transitions, 108 changer transitions 0/358 dead transitions. [2024-06-21 16:02:10,304 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 193 places, 358 transitions, 4792 flow [2024-06-21 16:02:10,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:02:10,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:02:10,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 243 transitions. [2024-06-21 16:02:10,305 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5955882352941176 [2024-06-21 16:02:10,305 INFO L175 Difference]: Start difference. First operand has 186 places, 300 transitions, 3632 flow. Second operand 8 states and 243 transitions. [2024-06-21 16:02:10,305 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 193 places, 358 transitions, 4792 flow [2024-06-21 16:02:11,134 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 191 places, 358 transitions, 4651 flow, removed 28 selfloop flow, removed 2 redundant places. [2024-06-21 16:02:11,138 INFO L231 Difference]: Finished difference. Result has 194 places, 320 transitions, 4043 flow [2024-06-21 16:02:11,138 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=3491, PETRI_DIFFERENCE_MINUEND_PLACES=184, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=300, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=88, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=203, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4043, PETRI_PLACES=194, PETRI_TRANSITIONS=320} [2024-06-21 16:02:11,140 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 140 predicate places. [2024-06-21 16:02:11,140 INFO L495 AbstractCegarLoop]: Abstraction has has 194 places, 320 transitions, 4043 flow [2024-06-21 16:02:11,140 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 19.875) internal successors, (159), 8 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:02:11,140 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:02:11,140 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:02:11,140 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2024-06-21 16:02:11,140 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 16:02:11,141 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:02:11,141 INFO L85 PathProgramCache]: Analyzing trace with hash 1660577495, now seen corresponding path program 3 times [2024-06-21 16:02:11,141 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:02:11,141 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [288631648] [2024-06-21 16:02:11,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:02:11,141 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:02:11,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:02:11,284 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:02:11,285 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:02:11,285 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [288631648] [2024-06-21 16:02:11,285 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [288631648] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:02:11,285 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:02:11,285 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 16:02:11,285 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [318135997] [2024-06-21 16:02:11,285 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:02:11,285 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 16:02:11,286 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:02:11,286 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 16:02:11,286 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2024-06-21 16:02:11,336 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 51 [2024-06-21 16:02:11,336 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 194 places, 320 transitions, 4043 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) [2024-06-21 16:02:11,337 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:02:11,337 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 51 [2024-06-21 16:02:11,337 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:02:12,688 INFO L124 PetriNetUnfolderBase]: 7931/11595 cut-off events. [2024-06-21 16:02:12,688 INFO L125 PetriNetUnfolderBase]: For 490753/490790 co-relation queries the response was YES. [2024-06-21 16:02:12,770 INFO L83 FinitePrefix]: Finished finitePrefix Result has 79960 conditions, 11595 events. 7931/11595 cut-off events. For 490753/490790 co-relation queries the response was YES. Maximal size of possible extension queue 443. Compared 68076 event pairs, 2557 based on Foata normal form. 35/11626 useless extension candidates. Maximal degree in co-relation 79867. Up to 10545 conditions per place. [2024-06-21 16:02:12,821 INFO L140 encePairwiseOnDemand]: 40/51 looper letters, 273 selfloop transitions, 79 changer transitions 0/361 dead transitions. [2024-06-21 16:02:12,821 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 200 places, 361 transitions, 5177 flow [2024-06-21 16:02:12,822 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 16:02:12,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 16:02:12,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 217 transitions. [2024-06-21 16:02:12,822 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6078431372549019 [2024-06-21 16:02:12,822 INFO L175 Difference]: Start difference. First operand has 194 places, 320 transitions, 4043 flow. Second operand 7 states and 217 transitions. [2024-06-21 16:02:12,822 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 200 places, 361 transitions, 5177 flow [2024-06-21 16:02:13,836 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 197 places, 361 transitions, 4964 flow, removed 43 selfloop flow, removed 3 redundant places. [2024-06-21 16:02:13,841 INFO L231 Difference]: Finished difference. Result has 198 places, 320 transitions, 4003 flow [2024-06-21 16:02:13,841 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=3836, PETRI_DIFFERENCE_MINUEND_PLACES=191, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=320, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=79, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=241, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4003, PETRI_PLACES=198, PETRI_TRANSITIONS=320} [2024-06-21 16:02:13,842 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 144 predicate places. [2024-06-21 16:02:13,842 INFO L495 AbstractCegarLoop]: Abstraction has has 198 places, 320 transitions, 4003 flow [2024-06-21 16:02:13,842 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) [2024-06-21 16:02:13,842 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:02:13,842 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:02:13,842 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2024-06-21 16:02:13,842 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 16:02:13,843 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:02:13,843 INFO L85 PathProgramCache]: Analyzing trace with hash 1394787959, now seen corresponding path program 1 times [2024-06-21 16:02:13,843 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:02:13,843 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1595236547] [2024-06-21 16:02:13,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:02:13,843 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:02:13,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:02:13,991 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:02:13,992 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:02:13,992 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1595236547] [2024-06-21 16:02:13,992 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1595236547] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:02:13,992 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:02:13,992 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 16:02:13,992 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [848966139] [2024-06-21 16:02:13,992 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:02:13,993 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 16:02:13,993 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:02:13,993 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 16:02:13,993 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-21 16:02:14,064 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 51 [2024-06-21 16:02:14,065 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 198 places, 320 transitions, 4003 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) [2024-06-21 16:02:14,065 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:02:14,065 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 51 [2024-06-21 16:02:14,065 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:02:15,614 INFO L124 PetriNetUnfolderBase]: 8132/11898 cut-off events. [2024-06-21 16:02:15,615 INFO L125 PetriNetUnfolderBase]: For 530486/530508 co-relation queries the response was YES. [2024-06-21 16:02:15,687 INFO L83 FinitePrefix]: Finished finitePrefix Result has 82080 conditions, 11898 events. 8132/11898 cut-off events. For 530486/530508 co-relation queries the response was YES. Maximal size of possible extension queue 461. Compared 70129 event pairs, 2067 based on Foata normal form. 30/11924 useless extension candidates. Maximal degree in co-relation 81987. Up to 10767 conditions per place. [2024-06-21 16:02:15,737 INFO L140 encePairwiseOnDemand]: 41/51 looper letters, 331 selfloop transitions, 39 changer transitions 0/379 dead transitions. [2024-06-21 16:02:15,737 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 204 places, 379 transitions, 5155 flow [2024-06-21 16:02:15,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 16:02:15,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 16:02:15,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 218 transitions. [2024-06-21 16:02:15,738 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6106442577030813 [2024-06-21 16:02:15,738 INFO L175 Difference]: Start difference. First operand has 198 places, 320 transitions, 4003 flow. Second operand 7 states and 218 transitions. [2024-06-21 16:02:15,738 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 204 places, 379 transitions, 5155 flow [2024-06-21 16:02:16,762 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 201 places, 379 transitions, 5022 flow, removed 7 selfloop flow, removed 3 redundant places. [2024-06-21 16:02:16,767 INFO L231 Difference]: Finished difference. Result has 204 places, 330 transitions, 4083 flow [2024-06-21 16:02:16,767 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=3870, PETRI_DIFFERENCE_MINUEND_PLACES=195, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=320, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=285, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4083, PETRI_PLACES=204, PETRI_TRANSITIONS=330} [2024-06-21 16:02:16,768 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 150 predicate places. [2024-06-21 16:02:16,768 INFO L495 AbstractCegarLoop]: Abstraction has has 204 places, 330 transitions, 4083 flow [2024-06-21 16:02:16,768 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) [2024-06-21 16:02:16,768 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:02:16,768 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:02:16,768 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2024-06-21 16:02:16,768 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 16:02:16,769 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:02:16,769 INFO L85 PathProgramCache]: Analyzing trace with hash 1402197269, now seen corresponding path program 2 times [2024-06-21 16:02:16,769 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:02:16,769 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [324923103] [2024-06-21 16:02:16,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:02:16,769 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:02:16,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:02:16,921 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:02:16,921 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:02:16,921 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [324923103] [2024-06-21 16:02:16,921 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [324923103] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:02:16,921 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:02:16,921 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 16:02:16,921 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [153749062] [2024-06-21 16:02:16,921 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:02:16,922 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 16:02:16,922 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:02:16,922 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 16:02:16,922 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-21 16:02:17,004 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 51 [2024-06-21 16:02:17,004 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 204 places, 330 transitions, 4083 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) [2024-06-21 16:02:17,004 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:02:17,004 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 51 [2024-06-21 16:02:17,005 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:02:18,482 INFO L124 PetriNetUnfolderBase]: 8372/12234 cut-off events. [2024-06-21 16:02:18,482 INFO L125 PetriNetUnfolderBase]: For 571665/571687 co-relation queries the response was YES. [2024-06-21 16:02:18,566 INFO L83 FinitePrefix]: Finished finitePrefix Result has 85844 conditions, 12234 events. 8372/12234 cut-off events. For 571665/571687 co-relation queries the response was YES. Maximal size of possible extension queue 479. Compared 72216 event pairs, 2557 based on Foata normal form. 30/12260 useless extension candidates. Maximal degree in co-relation 85748. Up to 11203 conditions per place. [2024-06-21 16:02:18,619 INFO L140 encePairwiseOnDemand]: 41/51 looper letters, 335 selfloop transitions, 36 changer transitions 0/380 dead transitions. [2024-06-21 16:02:18,619 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 210 places, 380 transitions, 5196 flow [2024-06-21 16:02:18,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 16:02:18,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 16:02:18,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 215 transitions. [2024-06-21 16:02:18,620 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6022408963585434 [2024-06-21 16:02:18,621 INFO L175 Difference]: Start difference. First operand has 204 places, 330 transitions, 4083 flow. Second operand 7 states and 215 transitions. [2024-06-21 16:02:18,621 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 210 places, 380 transitions, 5196 flow [2024-06-21 16:02:19,847 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 208 places, 380 transitions, 5142 flow, removed 11 selfloop flow, removed 2 redundant places. [2024-06-21 16:02:19,853 INFO L231 Difference]: Finished difference. Result has 210 places, 336 transitions, 4193 flow [2024-06-21 16:02:19,854 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=4033, PETRI_DIFFERENCE_MINUEND_PLACES=202, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=330, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=296, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4193, PETRI_PLACES=210, PETRI_TRANSITIONS=336} [2024-06-21 16:02:19,854 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 156 predicate places. [2024-06-21 16:02:19,855 INFO L495 AbstractCegarLoop]: Abstraction has has 210 places, 336 transitions, 4193 flow [2024-06-21 16:02:19,855 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) [2024-06-21 16:02:19,855 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:02:19,855 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:02:19,855 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2024-06-21 16:02:19,855 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 16:02:19,855 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:02:19,856 INFO L85 PathProgramCache]: Analyzing trace with hash 1660811669, now seen corresponding path program 3 times [2024-06-21 16:02:19,856 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:02:19,856 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [759247082] [2024-06-21 16:02:19,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:02:19,856 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:02:19,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:02:20,015 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:02:20,016 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:02:20,016 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [759247082] [2024-06-21 16:02:20,016 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [759247082] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:02:20,016 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:02:20,016 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 16:02:20,016 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1066225339] [2024-06-21 16:02:20,016 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:02:20,017 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 16:02:20,017 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:02:20,017 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 16:02:20,017 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-21 16:02:20,071 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 51 [2024-06-21 16:02:20,071 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 210 places, 336 transitions, 4193 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) [2024-06-21 16:02:20,072 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:02:20,072 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 51 [2024-06-21 16:02:20,072 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:02:21,649 INFO L124 PetriNetUnfolderBase]: 8328/12174 cut-off events. [2024-06-21 16:02:21,650 INFO L125 PetriNetUnfolderBase]: For 587577/587599 co-relation queries the response was YES. [2024-06-21 16:02:21,735 INFO L83 FinitePrefix]: Finished finitePrefix Result has 85833 conditions, 12174 events. 8328/12174 cut-off events. For 587577/587599 co-relation queries the response was YES. Maximal size of possible extension queue 473. Compared 71868 event pairs, 2556 based on Foata normal form. 34/12204 useless extension candidates. Maximal degree in co-relation 85734. Up to 11266 conditions per place. [2024-06-21 16:02:21,786 INFO L140 encePairwiseOnDemand]: 41/51 looper letters, 334 selfloop transitions, 33 changer transitions 0/376 dead transitions. [2024-06-21 16:02:21,786 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 216 places, 376 transitions, 5068 flow [2024-06-21 16:02:21,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 16:02:21,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 16:02:21,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 210 transitions. [2024-06-21 16:02:21,788 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5882352941176471 [2024-06-21 16:02:21,788 INFO L175 Difference]: Start difference. First operand has 210 places, 336 transitions, 4193 flow. Second operand 7 states and 210 transitions. [2024-06-21 16:02:21,788 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 216 places, 376 transitions, 5068 flow [2024-06-21 16:02:23,243 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 213 places, 376 transitions, 5022 flow, removed 6 selfloop flow, removed 3 redundant places. [2024-06-21 16:02:23,247 INFO L231 Difference]: Finished difference. Result has 214 places, 337 transitions, 4239 flow [2024-06-21 16:02:23,248 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=4149, PETRI_DIFFERENCE_MINUEND_PLACES=207, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=336, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=303, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4239, PETRI_PLACES=214, PETRI_TRANSITIONS=337} [2024-06-21 16:02:23,248 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 160 predicate places. [2024-06-21 16:02:23,248 INFO L495 AbstractCegarLoop]: Abstraction has has 214 places, 337 transitions, 4239 flow [2024-06-21 16:02:23,248 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) [2024-06-21 16:02:23,248 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:02:23,249 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:02:23,249 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2024-06-21 16:02:23,249 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 16:02:23,249 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:02:23,249 INFO L85 PathProgramCache]: Analyzing trace with hash 767747173, now seen corresponding path program 4 times [2024-06-21 16:02:23,249 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:02:23,249 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [274121717] [2024-06-21 16:02:23,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:02:23,250 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:02:23,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:02:23,404 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:02:23,405 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:02:23,405 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [274121717] [2024-06-21 16:02:23,405 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [274121717] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:02:23,405 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:02:23,405 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 16:02:23,405 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [842922704] [2024-06-21 16:02:23,405 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:02:23,406 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 16:02:23,406 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:02:23,406 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 16:02:23,407 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-21 16:02:23,486 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 51 [2024-06-21 16:02:23,486 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 214 places, 337 transitions, 4239 flow. Second operand has 8 states, 8 states have (on average 19.875) internal successors, (159), 8 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:02:23,487 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:02:23,487 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 51 [2024-06-21 16:02:23,487 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:02:24,933 INFO L124 PetriNetUnfolderBase]: 7928/11675 cut-off events. [2024-06-21 16:02:24,934 INFO L125 PetriNetUnfolderBase]: For 664894/666122 co-relation queries the response was YES. [2024-06-21 16:02:25,020 INFO L83 FinitePrefix]: Finished finitePrefix Result has 87673 conditions, 11675 events. 7928/11675 cut-off events. For 664894/666122 co-relation queries the response was YES. Maximal size of possible extension queue 478. Compared 70450 event pairs, 2278 based on Foata normal form. 119/11426 useless extension candidates. Maximal degree in co-relation 87572. Up to 10302 conditions per place. [2024-06-21 16:02:25,077 INFO L140 encePairwiseOnDemand]: 40/51 looper letters, 243 selfloop transitions, 112 changer transitions 0/395 dead transitions. [2024-06-21 16:02:25,077 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 221 places, 395 transitions, 5549 flow [2024-06-21 16:02:25,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:02:25,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:02:25,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 257 transitions. [2024-06-21 16:02:25,078 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6299019607843137 [2024-06-21 16:02:25,078 INFO L175 Difference]: Start difference. First operand has 214 places, 337 transitions, 4239 flow. Second operand 8 states and 257 transitions. [2024-06-21 16:02:25,092 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 221 places, 395 transitions, 5549 flow [2024-06-21 16:02:26,568 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 216 places, 395 transitions, 5485 flow, removed 1 selfloop flow, removed 5 redundant places. [2024-06-21 16:02:26,573 INFO L231 Difference]: Finished difference. Result has 217 places, 345 transitions, 4548 flow [2024-06-21 16:02:26,573 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=4175, PETRI_DIFFERENCE_MINUEND_PLACES=209, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=337, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=104, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=233, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4548, PETRI_PLACES=217, PETRI_TRANSITIONS=345} [2024-06-21 16:02:26,574 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 163 predicate places. [2024-06-21 16:02:26,574 INFO L495 AbstractCegarLoop]: Abstraction has has 217 places, 345 transitions, 4548 flow [2024-06-21 16:02:26,574 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 19.875) internal successors, (159), 8 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:02:26,574 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:02:26,574 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:02:26,574 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2024-06-21 16:02:26,574 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 16:02:26,575 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:02:26,575 INFO L85 PathProgramCache]: Analyzing trace with hash -1473818169, now seen corresponding path program 5 times [2024-06-21 16:02:26,575 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:02:26,575 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1837669499] [2024-06-21 16:02:26,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:02:26,575 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:02:26,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:02:26,727 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:02:26,728 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:02:26,728 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1837669499] [2024-06-21 16:02:26,728 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1837669499] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:02:26,728 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:02:26,728 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 16:02:26,728 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [459636627] [2024-06-21 16:02:26,728 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:02:26,728 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 16:02:26,729 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:02:26,729 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 16:02:26,729 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-21 16:02:26,801 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 51 [2024-06-21 16:02:26,802 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 217 places, 345 transitions, 4548 flow. Second operand has 8 states, 8 states have (on average 19.875) internal successors, (159), 8 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:02:26,802 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:02:26,802 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 51 [2024-06-21 16:02:26,802 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:02:28,362 INFO L124 PetriNetUnfolderBase]: 7974/11746 cut-off events. [2024-06-21 16:02:28,362 INFO L125 PetriNetUnfolderBase]: For 697434/698685 co-relation queries the response was YES. [2024-06-21 16:02:28,448 INFO L83 FinitePrefix]: Finished finitePrefix Result has 89230 conditions, 11746 events. 7974/11746 cut-off events. For 697434/698685 co-relation queries the response was YES. Maximal size of possible extension queue 480. Compared 70938 event pairs, 2278 based on Foata normal form. 155/11533 useless extension candidates. Maximal degree in co-relation 89128. Up to 10348 conditions per place. [2024-06-21 16:02:28,514 INFO L140 encePairwiseOnDemand]: 40/51 looper letters, 242 selfloop transitions, 123 changer transitions 0/405 dead transitions. [2024-06-21 16:02:28,514 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 225 places, 405 transitions, 5908 flow [2024-06-21 16:02:28,514 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 16:02:28,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 16:02:28,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 280 transitions. [2024-06-21 16:02:28,515 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6100217864923747 [2024-06-21 16:02:28,516 INFO L175 Difference]: Start difference. First operand has 217 places, 345 transitions, 4548 flow. Second operand 9 states and 280 transitions. [2024-06-21 16:02:28,516 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 225 places, 405 transitions, 5908 flow [2024-06-21 16:02:30,023 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 220 places, 405 transitions, 5531 flow, removed 53 selfloop flow, removed 5 redundant places. [2024-06-21 16:02:30,029 INFO L231 Difference]: Finished difference. Result has 221 places, 353 transitions, 4583 flow [2024-06-21 16:02:30,029 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=4215, PETRI_DIFFERENCE_MINUEND_PLACES=212, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=345, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=115, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=230, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4583, PETRI_PLACES=221, PETRI_TRANSITIONS=353} [2024-06-21 16:02:30,029 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 167 predicate places. [2024-06-21 16:02:30,029 INFO L495 AbstractCegarLoop]: Abstraction has has 221 places, 353 transitions, 4583 flow [2024-06-21 16:02:30,030 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 19.875) internal successors, (159), 8 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:02:30,030 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:02:30,030 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:02:30,030 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2024-06-21 16:02:30,030 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 16:02:30,030 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:02:30,030 INFO L85 PathProgramCache]: Analyzing trace with hash -1479363759, now seen corresponding path program 6 times [2024-06-21 16:02:30,030 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:02:30,031 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1507447874] [2024-06-21 16:02:30,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:02:30,031 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:02:30,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:02:30,178 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:02:30,178 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:02:30,179 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1507447874] [2024-06-21 16:02:30,179 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1507447874] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:02:30,179 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:02:30,179 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 16:02:30,179 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1753922885] [2024-06-21 16:02:30,179 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:02:30,179 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 16:02:30,180 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:02:30,180 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 16:02:30,180 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-21 16:02:30,241 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 51 [2024-06-21 16:02:30,242 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 221 places, 353 transitions, 4583 flow. Second operand has 8 states, 8 states have (on average 19.875) internal successors, (159), 8 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:02:30,242 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:02:30,242 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 51 [2024-06-21 16:02:30,242 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:02:31,744 INFO L124 PetriNetUnfolderBase]: 7980/11749 cut-off events. [2024-06-21 16:02:31,745 INFO L125 PetriNetUnfolderBase]: For 722451/723728 co-relation queries the response was YES. [2024-06-21 16:02:31,833 INFO L83 FinitePrefix]: Finished finitePrefix Result has 89636 conditions, 11749 events. 7980/11749 cut-off events. For 722451/723728 co-relation queries the response was YES. Maximal size of possible extension queue 478. Compared 70768 event pairs, 2308 based on Foata normal form. 146/11512 useless extension candidates. Maximal degree in co-relation 89533. Up to 10356 conditions per place. [2024-06-21 16:02:31,890 INFO L140 encePairwiseOnDemand]: 40/51 looper letters, 237 selfloop transitions, 112 changer transitions 0/389 dead transitions. [2024-06-21 16:02:31,890 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 226 places, 389 transitions, 5721 flow [2024-06-21 16:02:31,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 16:02:31,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 16:02:31,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 198 transitions. [2024-06-21 16:02:31,891 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6470588235294118 [2024-06-21 16:02:31,891 INFO L175 Difference]: Start difference. First operand has 221 places, 353 transitions, 4583 flow. Second operand 6 states and 198 transitions. [2024-06-21 16:02:31,891 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 226 places, 389 transitions, 5721 flow [2024-06-21 16:02:33,439 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 221 places, 389 transitions, 5449 flow, removed 36 selfloop flow, removed 5 redundant places. [2024-06-21 16:02:33,443 INFO L231 Difference]: Finished difference. Result has 222 places, 353 transitions, 4544 flow [2024-06-21 16:02:33,444 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=4311, PETRI_DIFFERENCE_MINUEND_PLACES=216, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=353, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=112, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=241, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=4544, PETRI_PLACES=222, PETRI_TRANSITIONS=353} [2024-06-21 16:02:33,444 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 168 predicate places. [2024-06-21 16:02:33,444 INFO L495 AbstractCegarLoop]: Abstraction has has 222 places, 353 transitions, 4544 flow [2024-06-21 16:02:33,444 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 19.875) internal successors, (159), 8 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:02:33,444 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:02:33,444 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:02:33,445 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2024-06-21 16:02:33,445 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 16:02:33,445 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:02:33,445 INFO L85 PathProgramCache]: Analyzing trace with hash -1479358923, now seen corresponding path program 4 times [2024-06-21 16:02:33,445 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:02:33,445 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [282523087] [2024-06-21 16:02:33,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:02:33,445 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:02:33,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:02:33,602 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:02:33,602 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:02:33,602 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [282523087] [2024-06-21 16:02:33,602 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [282523087] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:02:33,602 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:02:33,602 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 16:02:33,603 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [825892116] [2024-06-21 16:02:33,603 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:02:33,603 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 16:02:33,603 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:02:33,603 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 16:02:33,603 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-21 16:02:33,661 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 51 [2024-06-21 16:02:33,662 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 222 places, 353 transitions, 4544 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) [2024-06-21 16:02:33,662 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:02:33,662 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 51 [2024-06-21 16:02:33,662 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:02:35,276 INFO L124 PetriNetUnfolderBase]: 8424/12321 cut-off events. [2024-06-21 16:02:35,276 INFO L125 PetriNetUnfolderBase]: For 682070/682107 co-relation queries the response was YES. [2024-06-21 16:02:35,367 INFO L83 FinitePrefix]: Finished finitePrefix Result has 89466 conditions, 12321 events. 8424/12321 cut-off events. For 682070/682107 co-relation queries the response was YES. Maximal size of possible extension queue 482. Compared 72845 event pairs, 2609 based on Foata normal form. 35/12352 useless extension candidates. Maximal degree in co-relation 89362. Up to 11321 conditions per place. [2024-06-21 16:02:35,422 INFO L140 encePairwiseOnDemand]: 40/51 looper letters, 321 selfloop transitions, 57 changer transitions 0/387 dead transitions. [2024-06-21 16:02:35,422 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 227 places, 387 transitions, 5581 flow [2024-06-21 16:02:35,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 16:02:35,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 16:02:35,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 189 transitions. [2024-06-21 16:02:35,423 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6176470588235294 [2024-06-21 16:02:35,423 INFO L175 Difference]: Start difference. First operand has 222 places, 353 transitions, 4544 flow. Second operand 6 states and 189 transitions. [2024-06-21 16:02:35,424 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 227 places, 387 transitions, 5581 flow [2024-06-21 16:02:37,172 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 222 places, 387 transitions, 5333 flow, removed 7 selfloop flow, removed 5 redundant places. [2024-06-21 16:02:37,177 INFO L231 Difference]: Finished difference. Result has 223 places, 353 transitions, 4426 flow [2024-06-21 16:02:37,178 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=4298, PETRI_DIFFERENCE_MINUEND_PLACES=217, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=353, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=57, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=296, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=4426, PETRI_PLACES=223, PETRI_TRANSITIONS=353} [2024-06-21 16:02:37,178 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 169 predicate places. [2024-06-21 16:02:37,178 INFO L495 AbstractCegarLoop]: Abstraction has has 223 places, 353 transitions, 4426 flow [2024-06-21 16:02:37,178 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) [2024-06-21 16:02:37,178 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:02:37,179 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:02:37,179 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2024-06-21 16:02:37,179 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 16:02:37,179 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:02:37,179 INFO L85 PathProgramCache]: Analyzing trace with hash -1479359109, now seen corresponding path program 7 times [2024-06-21 16:02:37,179 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:02:37,179 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1841335798] [2024-06-21 16:02:37,179 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:02:37,180 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:02:37,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:02:37,341 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:02:37,342 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:02:37,342 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1841335798] [2024-06-21 16:02:37,342 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1841335798] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:02:37,342 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:02:37,342 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 16:02:37,342 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [228244352] [2024-06-21 16:02:37,342 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:02:37,343 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 16:02:37,343 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:02:37,343 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 16:02:37,343 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-21 16:02:37,415 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 51 [2024-06-21 16:02:37,415 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 223 places, 353 transitions, 4426 flow. Second operand has 8 states, 8 states have (on average 19.875) internal successors, (159), 8 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:02:37,415 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:02:37,415 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 51 [2024-06-21 16:02:37,415 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:02:38,983 INFO L124 PetriNetUnfolderBase]: 7953/11717 cut-off events. [2024-06-21 16:02:38,984 INFO L125 PetriNetUnfolderBase]: For 775205/776485 co-relation queries the response was YES. [2024-06-21 16:02:39,074 INFO L83 FinitePrefix]: Finished finitePrefix Result has 90142 conditions, 11717 events. 7953/11717 cut-off events. For 775205/776485 co-relation queries the response was YES. Maximal size of possible extension queue 478. Compared 70685 event pairs, 2276 based on Foata normal form. 97/11446 useless extension candidates. Maximal degree in co-relation 90037. Up to 10522 conditions per place. [2024-06-21 16:02:39,131 INFO L140 encePairwiseOnDemand]: 40/51 looper letters, 264 selfloop transitions, 77 changer transitions 0/381 dead transitions. [2024-06-21 16:02:39,131 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 228 places, 381 transitions, 5180 flow [2024-06-21 16:02:39,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 16:02:39,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 16:02:39,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 189 transitions. [2024-06-21 16:02:39,132 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6176470588235294 [2024-06-21 16:02:39,132 INFO L175 Difference]: Start difference. First operand has 223 places, 353 transitions, 4426 flow. Second operand 6 states and 189 transitions. [2024-06-21 16:02:39,133 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 228 places, 381 transitions, 5180 flow [2024-06-21 16:02:41,199 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 223 places, 381 transitions, 5006 flow, removed 12 selfloop flow, removed 5 redundant places. [2024-06-21 16:02:41,204 INFO L231 Difference]: Finished difference. Result has 224 places, 353 transitions, 4416 flow [2024-06-21 16:02:41,204 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=4252, PETRI_DIFFERENCE_MINUEND_PLACES=218, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=353, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=77, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=276, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=4416, PETRI_PLACES=224, PETRI_TRANSITIONS=353} [2024-06-21 16:02:41,204 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 170 predicate places. [2024-06-21 16:02:41,204 INFO L495 AbstractCegarLoop]: Abstraction has has 224 places, 353 transitions, 4416 flow [2024-06-21 16:02:41,205 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 19.875) internal successors, (159), 8 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:02:41,205 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:02:41,205 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:02:41,205 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2024-06-21 16:02:41,205 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 16:02:41,205 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:02:41,205 INFO L85 PathProgramCache]: Analyzing trace with hash -525431883, now seen corresponding path program 5 times [2024-06-21 16:02:41,206 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:02:41,206 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1847777160] [2024-06-21 16:02:41,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:02:41,206 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:02:41,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:02:41,351 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:02:41,352 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:02:41,352 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1847777160] [2024-06-21 16:02:41,352 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1847777160] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:02:41,352 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:02:41,352 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 16:02:41,352 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [643835244] [2024-06-21 16:02:41,352 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:02:41,352 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 16:02:41,353 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:02:41,353 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 16:02:41,353 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-21 16:02:41,425 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 51 [2024-06-21 16:02:41,425 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 224 places, 353 transitions, 4416 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) [2024-06-21 16:02:41,425 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:02:41,425 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 51 [2024-06-21 16:02:41,425 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:02:43,049 INFO L124 PetriNetUnfolderBase]: 8429/12328 cut-off events. [2024-06-21 16:02:43,050 INFO L125 PetriNetUnfolderBase]: For 732957/732994 co-relation queries the response was YES. [2024-06-21 16:02:43,145 INFO L83 FinitePrefix]: Finished finitePrefix Result has 90330 conditions, 12328 events. 8429/12328 cut-off events. For 732957/732994 co-relation queries the response was YES. Maximal size of possible extension queue 481. Compared 72924 event pairs, 2608 based on Foata normal form. 35/12359 useless extension candidates. Maximal degree in co-relation 90224. Up to 11324 conditions per place. [2024-06-21 16:02:43,202 INFO L140 encePairwiseOnDemand]: 41/51 looper letters, 317 selfloop transitions, 61 changer transitions 0/387 dead transitions. [2024-06-21 16:02:43,202 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 228 places, 387 transitions, 5509 flow [2024-06-21 16:02:43,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-21 16:02:43,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-21 16:02:43,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 163 transitions. [2024-06-21 16:02:43,203 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6392156862745098 [2024-06-21 16:02:43,203 INFO L175 Difference]: Start difference. First operand has 224 places, 353 transitions, 4416 flow. Second operand 5 states and 163 transitions. [2024-06-21 16:02:43,204 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 228 places, 387 transitions, 5509 flow [2024-06-21 16:02:45,126 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 222 places, 387 transitions, 5299 flow, removed 1 selfloop flow, removed 6 redundant places. [2024-06-21 16:02:45,131 INFO L231 Difference]: Finished difference. Result has 224 places, 358 transitions, 4457 flow [2024-06-21 16:02:45,131 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=4208, PETRI_DIFFERENCE_MINUEND_PLACES=218, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=353, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=56, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=296, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=4457, PETRI_PLACES=224, PETRI_TRANSITIONS=358} [2024-06-21 16:02:45,131 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 170 predicate places. [2024-06-21 16:02:45,131 INFO L495 AbstractCegarLoop]: Abstraction has has 224 places, 358 transitions, 4457 flow [2024-06-21 16:02:45,131 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) [2024-06-21 16:02:45,131 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:02:45,132 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:02:45,132 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2024-06-21 16:02:45,132 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 16:02:45,132 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:02:45,132 INFO L85 PathProgramCache]: Analyzing trace with hash -525432069, now seen corresponding path program 8 times [2024-06-21 16:02:45,132 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:02:45,132 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1835758654] [2024-06-21 16:02:45,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:02:45,133 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:02:45,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:02:45,284 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:02:45,284 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:02:45,284 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1835758654] [2024-06-21 16:02:45,285 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1835758654] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:02:45,285 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:02:45,285 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 16:02:45,285 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1630268786] [2024-06-21 16:02:45,285 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:02:45,285 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 16:02:45,285 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:02:45,286 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 16:02:45,287 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-21 16:02:45,340 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 51 [2024-06-21 16:02:45,341 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 224 places, 358 transitions, 4457 flow. Second operand has 8 states, 8 states have (on average 19.875) internal successors, (159), 8 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:02:45,341 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:02:45,341 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 51 [2024-06-21 16:02:45,341 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:02:47,085 INFO L124 PetriNetUnfolderBase]: 7953/11724 cut-off events. [2024-06-21 16:02:47,086 INFO L125 PetriNetUnfolderBase]: For 829183/830446 co-relation queries the response was YES. [2024-06-21 16:02:47,179 INFO L83 FinitePrefix]: Finished finitePrefix Result has 91404 conditions, 11724 events. 7953/11724 cut-off events. For 829183/830446 co-relation queries the response was YES. Maximal size of possible extension queue 477. Compared 70886 event pairs, 2275 based on Foata normal form. 128/11484 useless extension candidates. Maximal degree in co-relation 91297. Up to 10388 conditions per place. [2024-06-21 16:02:47,238 INFO L140 encePairwiseOnDemand]: 40/51 looper letters, 256 selfloop transitions, 105 changer transitions 0/402 dead transitions. [2024-06-21 16:02:47,238 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 230 places, 402 transitions, 5483 flow [2024-06-21 16:02:47,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 16:02:47,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 16:02:47,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 229 transitions. [2024-06-21 16:02:47,240 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6414565826330533 [2024-06-21 16:02:47,240 INFO L175 Difference]: Start difference. First operand has 224 places, 358 transitions, 4457 flow. Second operand 7 states and 229 transitions. [2024-06-21 16:02:47,240 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 230 places, 402 transitions, 5483 flow [2024-06-21 16:02:49,022 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 226 places, 402 transitions, 5330 flow, removed 32 selfloop flow, removed 4 redundant places. [2024-06-21 16:02:49,029 INFO L231 Difference]: Finished difference. Result has 227 places, 358 transitions, 4544 flow [2024-06-21 16:02:49,029 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=4312, PETRI_DIFFERENCE_MINUEND_PLACES=220, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=358, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=105, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=253, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4544, PETRI_PLACES=227, PETRI_TRANSITIONS=358} [2024-06-21 16:02:49,029 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 173 predicate places. [2024-06-21 16:02:49,029 INFO L495 AbstractCegarLoop]: Abstraction has has 227 places, 358 transitions, 4544 flow [2024-06-21 16:02:49,030 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 19.875) internal successors, (159), 8 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:02:49,030 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:02:49,030 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:02:49,030 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2024-06-21 16:02:49,030 INFO L420 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 16:02:49,030 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:02:49,030 INFO L85 PathProgramCache]: Analyzing trace with hash -525420723, now seen corresponding path program 6 times [2024-06-21 16:02:49,030 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:02:49,031 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2038131348] [2024-06-21 16:02:49,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:02:49,031 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:02:49,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:02:49,179 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:02:49,179 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:02:49,179 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2038131348] [2024-06-21 16:02:49,179 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2038131348] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:02:49,179 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:02:49,179 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 16:02:49,179 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [819029654] [2024-06-21 16:02:49,180 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:02:49,180 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 16:02:49,180 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:02:49,181 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 16:02:49,181 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-21 16:02:49,214 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 51 [2024-06-21 16:02:49,214 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 227 places, 358 transitions, 4544 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) [2024-06-21 16:02:49,215 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:02:49,215 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 51 [2024-06-21 16:02:49,215 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:02:50,904 INFO L124 PetriNetUnfolderBase]: 8411/12306 cut-off events. [2024-06-21 16:02:50,904 INFO L125 PetriNetUnfolderBase]: For 728748/728787 co-relation queries the response was YES. [2024-06-21 16:02:51,014 INFO L83 FinitePrefix]: Finished finitePrefix Result has 90208 conditions, 12306 events. 8411/12306 cut-off events. For 728748/728787 co-relation queries the response was YES. Maximal size of possible extension queue 479. Compared 72925 event pairs, 2591 based on Foata normal form. 37/12340 useless extension candidates. Maximal degree in co-relation 90102. Up to 11303 conditions per place. [2024-06-21 16:02:51,074 INFO L140 encePairwiseOnDemand]: 41/51 looper letters, 319 selfloop transitions, 66 changer transitions 0/394 dead transitions. [2024-06-21 16:02:51,074 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 233 places, 394 transitions, 5424 flow [2024-06-21 16:02:51,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 16:02:51,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 16:02:51,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 212 transitions. [2024-06-21 16:02:51,075 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5938375350140056 [2024-06-21 16:02:51,075 INFO L175 Difference]: Start difference. First operand has 227 places, 358 transitions, 4544 flow. Second operand 7 states and 212 transitions. [2024-06-21 16:02:51,076 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 233 places, 394 transitions, 5424 flow [2024-06-21 16:02:53,431 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 224 places, 394 transitions, 5144 flow, removed 11 selfloop flow, removed 9 redundant places. [2024-06-21 16:02:53,436 INFO L231 Difference]: Finished difference. Result has 225 places, 359 transitions, 4423 flow [2024-06-21 16:02:53,436 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=4266, PETRI_DIFFERENCE_MINUEND_PLACES=218, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=358, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=65, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=293, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4423, PETRI_PLACES=225, PETRI_TRANSITIONS=359} [2024-06-21 16:02:53,437 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 171 predicate places. [2024-06-21 16:02:53,437 INFO L495 AbstractCegarLoop]: Abstraction has has 225 places, 359 transitions, 4423 flow [2024-06-21 16:02:53,437 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) [2024-06-21 16:02:53,437 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:02:53,437 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:02:53,437 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2024-06-21 16:02:53,437 INFO L420 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 16:02:53,438 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:02:53,438 INFO L85 PathProgramCache]: Analyzing trace with hash -525426489, now seen corresponding path program 9 times [2024-06-21 16:02:53,438 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:02:53,438 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [646022192] [2024-06-21 16:02:53,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:02:53,438 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:02:53,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:02:53,584 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:02:53,584 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:02:53,585 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [646022192] [2024-06-21 16:02:53,585 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [646022192] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:02:53,585 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:02:53,585 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 16:02:53,585 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [869905131] [2024-06-21 16:02:53,585 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:02:53,585 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 16:02:53,585 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:02:53,586 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 16:02:53,586 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-21 16:02:53,634 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 51 [2024-06-21 16:02:53,635 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 225 places, 359 transitions, 4423 flow. Second operand has 8 states, 8 states have (on average 19.875) internal successors, (159), 8 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:02:53,635 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:02:53,635 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 51 [2024-06-21 16:02:53,635 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:02:55,170 INFO L124 PetriNetUnfolderBase]: 7935/11701 cut-off events. [2024-06-21 16:02:55,170 INFO L125 PetriNetUnfolderBase]: For 763983/765239 co-relation queries the response was YES. [2024-06-21 16:02:55,256 INFO L83 FinitePrefix]: Finished finitePrefix Result has 89592 conditions, 11701 events. 7935/11701 cut-off events. For 763983/765239 co-relation queries the response was YES. Maximal size of possible extension queue 476. Compared 70692 event pairs, 2275 based on Foata normal form. 128/11461 useless extension candidates. Maximal degree in co-relation 89487. Up to 10370 conditions per place. [2024-06-21 16:02:55,310 INFO L140 encePairwiseOnDemand]: 40/51 looper letters, 247 selfloop transitions, 105 changer transitions 0/394 dead transitions. [2024-06-21 16:02:55,311 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 230 places, 394 transitions, 5219 flow [2024-06-21 16:02:55,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 16:02:55,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 16:02:55,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 198 transitions. [2024-06-21 16:02:55,311 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6470588235294118 [2024-06-21 16:02:55,312 INFO L175 Difference]: Start difference. First operand has 225 places, 359 transitions, 4423 flow. Second operand 6 states and 198 transitions. [2024-06-21 16:02:55,312 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 230 places, 394 transitions, 5219 flow [2024-06-21 16:02:57,078 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 224 places, 394 transitions, 5042 flow, removed 20 selfloop flow, removed 6 redundant places. [2024-06-21 16:02:57,082 INFO L231 Difference]: Finished difference. Result has 225 places, 359 transitions, 4472 flow [2024-06-21 16:02:57,082 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=4246, PETRI_DIFFERENCE_MINUEND_PLACES=219, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=359, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=105, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=254, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=4472, PETRI_PLACES=225, PETRI_TRANSITIONS=359} [2024-06-21 16:02:57,083 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 171 predicate places. [2024-06-21 16:02:57,083 INFO L495 AbstractCegarLoop]: Abstraction has has 225 places, 359 transitions, 4472 flow [2024-06-21 16:02:57,083 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 19.875) internal successors, (159), 8 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:02:57,083 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:02:57,083 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:02:57,083 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2024-06-21 16:02:57,083 INFO L420 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 16:02:57,084 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:02:57,084 INFO L85 PathProgramCache]: Analyzing trace with hash -727576499, now seen corresponding path program 7 times [2024-06-21 16:02:57,084 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:02:57,084 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1853352801] [2024-06-21 16:02:57,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:02:57,084 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:02:57,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:02:57,241 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:02:57,242 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:02:57,242 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1853352801] [2024-06-21 16:02:57,242 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1853352801] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:02:57,242 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:02:57,242 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 16:02:57,242 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1428289131] [2024-06-21 16:02:57,242 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:02:57,243 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 16:02:57,243 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:02:57,244 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 16:02:57,244 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2024-06-21 16:02:57,300 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 51 [2024-06-21 16:02:57,300 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 225 places, 359 transitions, 4472 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) [2024-06-21 16:02:57,301 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:02:57,301 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 51 [2024-06-21 16:02:57,301 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:02:58,841 INFO L124 PetriNetUnfolderBase]: 8416/12313 cut-off events. [2024-06-21 16:02:58,841 INFO L125 PetriNetUnfolderBase]: For 698896/698922 co-relation queries the response was YES. [2024-06-21 16:02:58,939 INFO L83 FinitePrefix]: Finished finitePrefix Result has 89377 conditions, 12313 events. 8416/12313 cut-off events. For 698896/698922 co-relation queries the response was YES. Maximal size of possible extension queue 481. Compared 72999 event pairs, 2643 based on Foata normal form. 19/12328 useless extension candidates. Maximal degree in co-relation 89272. Up to 11216 conditions per place. [2024-06-21 16:02:58,996 INFO L140 encePairwiseOnDemand]: 41/51 looper letters, 292 selfloop transitions, 91 changer transitions 0/392 dead transitions. [2024-06-21 16:02:58,996 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 230 places, 392 transitions, 5564 flow [2024-06-21 16:02:58,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 16:02:58,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 16:02:58,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 182 transitions. [2024-06-21 16:02:58,997 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5947712418300654 [2024-06-21 16:02:58,997 INFO L175 Difference]: Start difference. First operand has 225 places, 359 transitions, 4472 flow. Second operand 6 states and 182 transitions. [2024-06-21 16:02:58,997 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 230 places, 392 transitions, 5564 flow [2024-06-21 16:03:00,919 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 224 places, 392 transitions, 5340 flow, removed 4 selfloop flow, removed 6 redundant places. [2024-06-21 16:03:00,924 INFO L231 Difference]: Finished difference. Result has 226 places, 365 transitions, 4556 flow [2024-06-21 16:03:00,924 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=4252, PETRI_DIFFERENCE_MINUEND_PLACES=219, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=359, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=85, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=273, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=4556, PETRI_PLACES=226, PETRI_TRANSITIONS=365} [2024-06-21 16:03:00,925 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 172 predicate places. [2024-06-21 16:03:00,925 INFO L495 AbstractCegarLoop]: Abstraction has has 226 places, 365 transitions, 4556 flow [2024-06-21 16:03:00,925 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) [2024-06-21 16:03:00,925 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:03:00,925 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:03:00,925 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2024-06-21 16:03:00,925 INFO L420 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 16:03:00,926 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:03:00,926 INFO L85 PathProgramCache]: Analyzing trace with hash -738538409, now seen corresponding path program 8 times [2024-06-21 16:03:00,926 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:03:00,926 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1236562361] [2024-06-21 16:03:00,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:03:00,926 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:03:00,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:03:01,079 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:03:01,079 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:03:01,079 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1236562361] [2024-06-21 16:03:01,079 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1236562361] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:03:01,079 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:03:01,080 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 16:03:01,080 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1457862348] [2024-06-21 16:03:01,080 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:03:01,080 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 16:03:01,080 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:03:01,080 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 16:03:01,081 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2024-06-21 16:03:01,140 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 51 [2024-06-21 16:03:01,140 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 226 places, 365 transitions, 4556 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) [2024-06-21 16:03:01,141 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:03:01,141 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 51 [2024-06-21 16:03:01,141 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:03:02,733 INFO L124 PetriNetUnfolderBase]: 8432/12338 cut-off events. [2024-06-21 16:03:02,734 INFO L125 PetriNetUnfolderBase]: For 697043/697080 co-relation queries the response was YES. [2024-06-21 16:03:02,832 INFO L83 FinitePrefix]: Finished finitePrefix Result has 89745 conditions, 12338 events. 8432/12338 cut-off events. For 697043/697080 co-relation queries the response was YES. Maximal size of possible extension queue 482. Compared 73043 event pairs, 2607 based on Foata normal form. 35/12369 useless extension candidates. Maximal degree in co-relation 89639. Up to 11233 conditions per place. [2024-06-21 16:03:02,891 INFO L140 encePairwiseOnDemand]: 41/51 looper letters, 300 selfloop transitions, 96 changer transitions 0/405 dead transitions. [2024-06-21 16:03:02,891 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 231 places, 405 transitions, 5689 flow [2024-06-21 16:03:02,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 16:03:02,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 16:03:02,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 192 transitions. [2024-06-21 16:03:02,892 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6274509803921569 [2024-06-21 16:03:02,892 INFO L175 Difference]: Start difference. First operand has 226 places, 365 transitions, 4556 flow. Second operand 6 states and 192 transitions. [2024-06-21 16:03:02,892 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 231 places, 405 transitions, 5689 flow [2024-06-21 16:03:05,048 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 229 places, 405 transitions, 5552 flow, removed 23 selfloop flow, removed 2 redundant places. [2024-06-21 16:03:05,052 INFO L231 Difference]: Finished difference. Result has 230 places, 369 transitions, 4690 flow [2024-06-21 16:03:05,053 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=4433, PETRI_DIFFERENCE_MINUEND_PLACES=224, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=365, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=92, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=273, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=4690, PETRI_PLACES=230, PETRI_TRANSITIONS=369} [2024-06-21 16:03:05,053 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 176 predicate places. [2024-06-21 16:03:05,053 INFO L495 AbstractCegarLoop]: Abstraction has has 230 places, 369 transitions, 4690 flow [2024-06-21 16:03:05,053 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) [2024-06-21 16:03:05,053 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:03:05,053 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:03:05,053 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2024-06-21 16:03:05,054 INFO L420 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 16:03:05,054 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:03:05,054 INFO L85 PathProgramCache]: Analyzing trace with hash -738301259, now seen corresponding path program 9 times [2024-06-21 16:03:05,054 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:03:05,054 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [59847466] [2024-06-21 16:03:05,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:03:05,054 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:03:05,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:03:05,193 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:03:05,193 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:03:05,193 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [59847466] [2024-06-21 16:03:05,193 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [59847466] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:03:05,194 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:03:05,194 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 16:03:05,194 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [749480621] [2024-06-21 16:03:05,194 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:03:05,194 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 16:03:05,194 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:03:05,195 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 16:03:05,195 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2024-06-21 16:03:05,233 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 51 [2024-06-21 16:03:05,233 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 230 places, 369 transitions, 4690 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) [2024-06-21 16:03:05,233 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:03:05,233 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 51 [2024-06-21 16:03:05,233 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:03:06,993 INFO L124 PetriNetUnfolderBase]: 8425/12329 cut-off events. [2024-06-21 16:03:06,993 INFO L125 PetriNetUnfolderBase]: For 723892/723929 co-relation queries the response was YES. [2024-06-21 16:03:07,115 INFO L83 FinitePrefix]: Finished finitePrefix Result has 90207 conditions, 12329 events. 8425/12329 cut-off events. For 723892/723929 co-relation queries the response was YES. Maximal size of possible extension queue 482. Compared 72976 event pairs, 2607 based on Foata normal form. 35/12360 useless extension candidates. Maximal degree in co-relation 90099. Up to 11226 conditions per place. [2024-06-21 16:03:07,182 INFO L140 encePairwiseOnDemand]: 41/51 looper letters, 295 selfloop transitions, 96 changer transitions 0/400 dead transitions. [2024-06-21 16:03:07,182 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 235 places, 400 transitions, 5559 flow [2024-06-21 16:03:07,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 16:03:07,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 16:03:07,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 186 transitions. [2024-06-21 16:03:07,183 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6078431372549019 [2024-06-21 16:03:07,183 INFO L175 Difference]: Start difference. First operand has 230 places, 369 transitions, 4690 flow. Second operand 6 states and 186 transitions. [2024-06-21 16:03:07,183 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 235 places, 400 transitions, 5559 flow [2024-06-21 16:03:08,933 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 230 places, 400 transitions, 5368 flow, removed 18 selfloop flow, removed 5 redundant places. [2024-06-21 16:03:08,938 INFO L231 Difference]: Finished difference. Result has 231 places, 369 transitions, 4705 flow [2024-06-21 16:03:08,938 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=4499, PETRI_DIFFERENCE_MINUEND_PLACES=225, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=369, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=96, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=273, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=4705, PETRI_PLACES=231, PETRI_TRANSITIONS=369} [2024-06-21 16:03:08,938 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 177 predicate places. [2024-06-21 16:03:08,939 INFO L495 AbstractCegarLoop]: Abstraction has has 231 places, 369 transitions, 4705 flow [2024-06-21 16:03:08,939 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) [2024-06-21 16:03:08,939 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:03:08,939 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:03:08,939 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2024-06-21 16:03:08,939 INFO L420 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 16:03:08,939 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:03:08,939 INFO L85 PathProgramCache]: Analyzing trace with hash -738538595, now seen corresponding path program 10 times [2024-06-21 16:03:08,940 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:03:08,940 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1819864010] [2024-06-21 16:03:08,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:03:08,940 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:03:08,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:03:09,131 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:03:09,132 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:03:09,132 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1819864010] [2024-06-21 16:03:09,132 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1819864010] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:03:09,132 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:03:09,132 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 16:03:09,132 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1071883148] [2024-06-21 16:03:09,132 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:03:09,133 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 16:03:09,134 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:03:09,134 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 16:03:09,134 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-21 16:03:09,180 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 51 [2024-06-21 16:03:09,181 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 231 places, 369 transitions, 4705 flow. Second operand has 8 states, 8 states have (on average 19.875) internal successors, (159), 8 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:03:09,181 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:03:09,181 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 51 [2024-06-21 16:03:09,181 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:03:10,742 INFO L124 PetriNetUnfolderBase]: 7951/11727 cut-off events. [2024-06-21 16:03:10,742 INFO L125 PetriNetUnfolderBase]: For 760410/761666 co-relation queries the response was YES. [2024-06-21 16:03:10,839 INFO L83 FinitePrefix]: Finished finitePrefix Result has 89787 conditions, 11727 events. 7951/11727 cut-off events. For 760410/761666 co-relation queries the response was YES. Maximal size of possible extension queue 475. Compared 70823 event pairs, 2274 based on Foata normal form. 151/11510 useless extension candidates. Maximal degree in co-relation 89680. Up to 10289 conditions per place. [2024-06-21 16:03:10,895 INFO L140 encePairwiseOnDemand]: 40/51 looper letters, 226 selfloop transitions, 147 changer transitions 0/418 dead transitions. [2024-06-21 16:03:10,895 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 238 places, 418 transitions, 5579 flow [2024-06-21 16:03:10,896 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:03:10,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:03:10,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 257 transitions. [2024-06-21 16:03:10,896 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6299019607843137 [2024-06-21 16:03:10,896 INFO L175 Difference]: Start difference. First operand has 231 places, 369 transitions, 4705 flow. Second operand 8 states and 257 transitions. [2024-06-21 16:03:10,897 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 238 places, 418 transitions, 5579 flow [2024-06-21 16:03:12,786 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 233 places, 418 transitions, 5360 flow, removed 14 selfloop flow, removed 5 redundant places. [2024-06-21 16:03:12,791 INFO L231 Difference]: Finished difference. Result has 234 places, 369 transitions, 4808 flow [2024-06-21 16:03:12,791 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=4486, PETRI_DIFFERENCE_MINUEND_PLACES=226, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=369, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=147, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=222, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4808, PETRI_PLACES=234, PETRI_TRANSITIONS=369} [2024-06-21 16:03:12,792 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 180 predicate places. [2024-06-21 16:03:12,792 INFO L495 AbstractCegarLoop]: Abstraction has has 234 places, 369 transitions, 4808 flow [2024-06-21 16:03:12,792 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 19.875) internal successors, (159), 8 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:03:12,792 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:03:12,792 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:03:12,792 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2024-06-21 16:03:12,792 INFO L420 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 16:03:12,793 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:03:12,793 INFO L85 PathProgramCache]: Analyzing trace with hash -738304235, now seen corresponding path program 4 times [2024-06-21 16:03:12,793 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:03:12,793 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [48003252] [2024-06-21 16:03:12,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:03:12,793 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:03:12,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:03:12,964 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:03:12,965 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:03:12,965 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [48003252] [2024-06-21 16:03:12,965 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [48003252] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:03:12,965 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:03:12,965 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 16:03:12,965 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1709264303] [2024-06-21 16:03:12,965 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:03:12,965 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 16:03:12,966 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:03:12,966 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 16:03:12,966 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-21 16:03:13,002 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 51 [2024-06-21 16:03:13,002 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 234 places, 369 transitions, 4808 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) [2024-06-21 16:03:13,002 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:03:13,002 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 51 [2024-06-21 16:03:13,002 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:03:14,576 INFO L124 PetriNetUnfolderBase]: 8512/12465 cut-off events. [2024-06-21 16:03:14,576 INFO L125 PetriNetUnfolderBase]: For 708843/708865 co-relation queries the response was YES. [2024-06-21 16:03:14,669 INFO L83 FinitePrefix]: Finished finitePrefix Result has 90264 conditions, 12465 events. 8512/12465 cut-off events. For 708843/708865 co-relation queries the response was YES. Maximal size of possible extension queue 494. Compared 73881 event pairs, 2564 based on Foata normal form. 34/12495 useless extension candidates. Maximal degree in co-relation 90157. Up to 11426 conditions per place. [2024-06-21 16:03:14,723 INFO L140 encePairwiseOnDemand]: 42/51 looper letters, 362 selfloop transitions, 35 changer transitions 0/406 dead transitions. [2024-06-21 16:03:14,723 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 239 places, 406 transitions, 5743 flow [2024-06-21 16:03:14,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 16:03:14,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 16:03:14,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 185 transitions. [2024-06-21 16:03:14,724 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6045751633986928 [2024-06-21 16:03:14,724 INFO L175 Difference]: Start difference. First operand has 234 places, 369 transitions, 4808 flow. Second operand 6 states and 185 transitions. [2024-06-21 16:03:14,724 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 239 places, 406 transitions, 5743 flow [2024-06-21 16:03:16,320 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 231 places, 406 transitions, 5431 flow, removed 6 selfloop flow, removed 8 redundant places. [2024-06-21 16:03:16,325 INFO L231 Difference]: Finished difference. Result has 232 places, 371 transitions, 4608 flow [2024-06-21 16:03:16,325 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=4496, PETRI_DIFFERENCE_MINUEND_PLACES=226, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=369, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=334, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=4608, PETRI_PLACES=232, PETRI_TRANSITIONS=371} [2024-06-21 16:03:16,325 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 178 predicate places. [2024-06-21 16:03:16,325 INFO L495 AbstractCegarLoop]: Abstraction has has 232 places, 371 transitions, 4608 flow [2024-06-21 16:03:16,325 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) [2024-06-21 16:03:16,326 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:03:16,326 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:03:16,326 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2024-06-21 16:03:16,326 INFO L420 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 16:03:16,326 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:03:16,326 INFO L85 PathProgramCache]: Analyzing trace with hash -738630665, now seen corresponding path program 5 times [2024-06-21 16:03:16,326 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:03:16,326 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1644597735] [2024-06-21 16:03:16,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:03:16,327 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:03:16,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:03:16,476 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:03:16,477 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:03:16,477 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1644597735] [2024-06-21 16:03:16,477 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1644597735] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:03:16,477 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:03:16,477 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 16:03:16,477 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1711374754] [2024-06-21 16:03:16,477 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:03:16,478 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 16:03:16,478 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:03:16,478 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 16:03:16,478 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-21 16:03:16,529 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 51 [2024-06-21 16:03:16,529 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 232 places, 371 transitions, 4608 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) [2024-06-21 16:03:16,529 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:03:16,529 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 51 [2024-06-21 16:03:16,529 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:03:18,177 INFO L124 PetriNetUnfolderBase]: 8583/12566 cut-off events. [2024-06-21 16:03:18,178 INFO L125 PetriNetUnfolderBase]: For 650917/650939 co-relation queries the response was YES. [2024-06-21 16:03:18,284 INFO L83 FinitePrefix]: Finished finitePrefix Result has 89405 conditions, 12566 events. 8583/12566 cut-off events. For 650917/650939 co-relation queries the response was YES. Maximal size of possible extension queue 496. Compared 74574 event pairs, 2086 based on Foata normal form. 30/12592 useless extension candidates. Maximal degree in co-relation 89298. Up to 11091 conditions per place. [2024-06-21 16:03:18,342 INFO L140 encePairwiseOnDemand]: 42/51 looper letters, 358 selfloop transitions, 50 changer transitions 0/417 dead transitions. [2024-06-21 16:03:18,342 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 237 places, 417 transitions, 5780 flow [2024-06-21 16:03:18,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 16:03:18,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 16:03:18,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 193 transitions. [2024-06-21 16:03:18,343 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.630718954248366 [2024-06-21 16:03:18,343 INFO L175 Difference]: Start difference. First operand has 232 places, 371 transitions, 4608 flow. Second operand 6 states and 193 transitions. [2024-06-21 16:03:18,343 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 237 places, 417 transitions, 5780 flow [2024-06-21 16:03:19,963 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 233 places, 417 transitions, 5714 flow, removed 2 selfloop flow, removed 4 redundant places. [2024-06-21 16:03:19,967 INFO L231 Difference]: Finished difference. Result has 235 places, 374 transitions, 4722 flow [2024-06-21 16:03:19,967 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=4542, PETRI_DIFFERENCE_MINUEND_PLACES=228, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=371, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=323, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=4722, PETRI_PLACES=235, PETRI_TRANSITIONS=374} [2024-06-21 16:03:19,968 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 181 predicate places. [2024-06-21 16:03:19,968 INFO L495 AbstractCegarLoop]: Abstraction has has 235 places, 374 transitions, 4722 flow [2024-06-21 16:03:19,968 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) [2024-06-21 16:03:19,968 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:03:19,968 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:03:19,968 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2024-06-21 16:03:19,969 INFO L420 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 16:03:19,969 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:03:19,969 INFO L85 PathProgramCache]: Analyzing trace with hash -727579475, now seen corresponding path program 6 times [2024-06-21 16:03:19,969 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:03:19,969 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1821103090] [2024-06-21 16:03:19,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:03:19,969 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:03:19,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:03:20,130 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:03:20,131 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:03:20,131 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1821103090] [2024-06-21 16:03:20,131 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1821103090] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:03:20,131 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:03:20,131 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 16:03:20,131 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2004446848] [2024-06-21 16:03:20,131 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:03:20,131 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 16:03:20,132 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:03:20,132 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 16:03:20,132 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-21 16:03:20,174 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 51 [2024-06-21 16:03:20,174 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 235 places, 374 transitions, 4722 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) [2024-06-21 16:03:20,175 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:03:20,175 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 51 [2024-06-21 16:03:20,175 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:03:21,801 INFO L124 PetriNetUnfolderBase]: 8539/12503 cut-off events. [2024-06-21 16:03:21,801 INFO L125 PetriNetUnfolderBase]: For 668344/668358 co-relation queries the response was YES. [2024-06-21 16:03:21,925 INFO L83 FinitePrefix]: Finished finitePrefix Result has 89590 conditions, 12503 events. 8539/12503 cut-off events. For 668344/668358 co-relation queries the response was YES. Maximal size of possible extension queue 498. Compared 74159 event pairs, 2576 based on Foata normal form. 21/12520 useless extension candidates. Maximal degree in co-relation 89481. Up to 11559 conditions per place. [2024-06-21 16:03:21,997 INFO L140 encePairwiseOnDemand]: 42/51 looper letters, 362 selfloop transitions, 33 changer transitions 0/404 dead transitions. [2024-06-21 16:03:21,998 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 240 places, 404 transitions, 5631 flow [2024-06-21 16:03:21,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 16:03:21,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 16:03:21,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 179 transitions. [2024-06-21 16:03:21,999 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5849673202614379 [2024-06-21 16:03:21,999 INFO L175 Difference]: Start difference. First operand has 235 places, 374 transitions, 4722 flow. Second operand 6 states and 179 transitions. [2024-06-21 16:03:21,999 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 240 places, 404 transitions, 5631 flow [2024-06-21 16:03:23,864 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 235 places, 404 transitions, 5529 flow, removed 14 selfloop flow, removed 5 redundant places. [2024-06-21 16:03:23,869 INFO L231 Difference]: Finished difference. Result has 236 places, 375 transitions, 4716 flow [2024-06-21 16:03:23,884 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=4623, PETRI_DIFFERENCE_MINUEND_PLACES=230, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=374, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=341, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=4716, PETRI_PLACES=236, PETRI_TRANSITIONS=375} [2024-06-21 16:03:23,885 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 182 predicate places. [2024-06-21 16:03:23,885 INFO L495 AbstractCegarLoop]: Abstraction has has 236 places, 375 transitions, 4716 flow [2024-06-21 16:03:23,885 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) [2024-06-21 16:03:23,885 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:03:23,885 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:03:23,885 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2024-06-21 16:03:23,885 INFO L420 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 16:03:23,886 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:03:23,886 INFO L85 PathProgramCache]: Analyzing trace with hash -727179761, now seen corresponding path program 1 times [2024-06-21 16:03:23,886 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:03:23,886 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1873841600] [2024-06-21 16:03:23,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:03:23,886 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:03:23,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:03:24,039 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:03:24,040 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:03:24,040 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1873841600] [2024-06-21 16:03:24,040 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1873841600] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:03:24,040 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:03:24,040 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 16:03:24,040 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [112559985] [2024-06-21 16:03:24,040 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:03:24,041 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 16:03:24,041 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:03:24,041 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 16:03:24,041 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-21 16:03:24,077 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 51 [2024-06-21 16:03:24,077 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 236 places, 375 transitions, 4716 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) [2024-06-21 16:03:24,077 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:03:24,077 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 51 [2024-06-21 16:03:24,078 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:03:25,943 INFO L124 PetriNetUnfolderBase]: 8507/12459 cut-off events. [2024-06-21 16:03:25,943 INFO L125 PetriNetUnfolderBase]: For 626382/626396 co-relation queries the response was YES. [2024-06-21 16:03:26,151 INFO L83 FinitePrefix]: Finished finitePrefix Result has 87892 conditions, 12459 events. 8507/12459 cut-off events. For 626382/626396 co-relation queries the response was YES. Maximal size of possible extension queue 496. Compared 73841 event pairs, 2505 based on Foata normal form. 17/12472 useless extension candidates. Maximal degree in co-relation 87784. Up to 11216 conditions per place. [2024-06-21 16:03:26,202 INFO L140 encePairwiseOnDemand]: 42/51 looper letters, 363 selfloop transitions, 41 changer transitions 0/413 dead transitions. [2024-06-21 16:03:26,202 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 241 places, 413 transitions, 5685 flow [2024-06-21 16:03:26,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 16:03:26,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 16:03:26,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 182 transitions. [2024-06-21 16:03:26,205 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5947712418300654 [2024-06-21 16:03:26,205 INFO L175 Difference]: Start difference. First operand has 236 places, 375 transitions, 4716 flow. Second operand 6 states and 182 transitions. [2024-06-21 16:03:26,205 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 241 places, 413 transitions, 5685 flow [2024-06-21 16:03:27,705 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 237 places, 413 transitions, 5613 flow, removed 5 selfloop flow, removed 4 redundant places. [2024-06-21 16:03:27,710 INFO L231 Difference]: Finished difference. Result has 239 places, 380 transitions, 4797 flow [2024-06-21 16:03:27,710 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=4644, PETRI_DIFFERENCE_MINUEND_PLACES=232, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=375, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=335, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=4797, PETRI_PLACES=239, PETRI_TRANSITIONS=380} [2024-06-21 16:03:27,711 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 185 predicate places. [2024-06-21 16:03:27,711 INFO L495 AbstractCegarLoop]: Abstraction has has 239 places, 380 transitions, 4797 flow [2024-06-21 16:03:27,711 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) [2024-06-21 16:03:27,711 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:03:27,711 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:03:27,711 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2024-06-21 16:03:27,711 INFO L420 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 16:03:27,712 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:03:27,712 INFO L85 PathProgramCache]: Analyzing trace with hash -900760962, now seen corresponding path program 1 times [2024-06-21 16:03:27,712 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:03:27,712 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [83024860] [2024-06-21 16:03:27,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:03:27,712 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:03:27,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:03:27,881 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:03:27,882 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:03:27,882 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [83024860] [2024-06-21 16:03:27,882 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [83024860] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:03:27,882 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:03:27,882 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 16:03:27,882 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [94482639] [2024-06-21 16:03:27,882 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:03:27,882 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 16:03:27,883 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:03:27,883 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 16:03:27,883 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-21 16:03:27,921 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 51 [2024-06-21 16:03:27,922 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 239 places, 380 transitions, 4797 flow. Second operand has 6 states, 6 states have (on average 21.666666666666668) internal successors, (130), 6 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:03:27,922 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:03:27,922 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 51 [2024-06-21 16:03:27,922 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:03:29,871 INFO L124 PetriNetUnfolderBase]: 7752/11548 cut-off events. [2024-06-21 16:03:29,871 INFO L125 PetriNetUnfolderBase]: For 693240/693397 co-relation queries the response was YES. [2024-06-21 16:03:29,965 INFO L83 FinitePrefix]: Finished finitePrefix Result has 86244 conditions, 11548 events. 7752/11548 cut-off events. For 693240/693397 co-relation queries the response was YES. Maximal size of possible extension queue 487. Compared 70789 event pairs, 2364 based on Foata normal form. 65/11387 useless extension candidates. Maximal degree in co-relation 86134. Up to 10124 conditions per place. [2024-06-21 16:03:30,019 INFO L140 encePairwiseOnDemand]: 43/51 looper letters, 294 selfloop transitions, 41 changer transitions 0/395 dead transitions. [2024-06-21 16:03:30,019 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 242 places, 395 transitions, 5553 flow [2024-06-21 16:03:30,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-21 16:03:30,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-21 16:03:30,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 127 transitions. [2024-06-21 16:03:30,020 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6225490196078431 [2024-06-21 16:03:30,020 INFO L175 Difference]: Start difference. First operand has 239 places, 380 transitions, 4797 flow. Second operand 4 states and 127 transitions. [2024-06-21 16:03:30,020 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 242 places, 395 transitions, 5553 flow [2024-06-21 16:03:31,690 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 240 places, 395 transitions, 5503 flow, removed 8 selfloop flow, removed 2 redundant places. [2024-06-21 16:03:31,696 INFO L231 Difference]: Finished difference. Result has 241 places, 384 transitions, 4913 flow [2024-06-21 16:03:31,696 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=4747, PETRI_DIFFERENCE_MINUEND_PLACES=237, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=380, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=339, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=4913, PETRI_PLACES=241, PETRI_TRANSITIONS=384} [2024-06-21 16:03:31,697 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 187 predicate places. [2024-06-21 16:03:31,697 INFO L495 AbstractCegarLoop]: Abstraction has has 241 places, 384 transitions, 4913 flow [2024-06-21 16:03:31,697 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 21.666666666666668) internal successors, (130), 6 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:03:31,697 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:03:31,697 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:03:31,697 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2024-06-21 16:03:31,697 INFO L420 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 16:03:31,698 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:03:31,698 INFO L85 PathProgramCache]: Analyzing trace with hash 738876346, now seen corresponding path program 2 times [2024-06-21 16:03:31,698 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:03:31,698 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [819113974] [2024-06-21 16:03:31,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:03:31,698 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:03:31,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:03:31,815 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:03:31,815 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:03:31,816 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [819113974] [2024-06-21 16:03:31,816 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [819113974] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:03:31,816 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:03:31,816 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 16:03:31,816 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1214915611] [2024-06-21 16:03:31,816 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:03:31,816 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 16:03:31,817 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:03:31,817 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 16:03:31,817 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-21 16:03:31,873 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 51 [2024-06-21 16:03:31,873 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 241 places, 384 transitions, 4913 flow. Second operand has 6 states, 6 states have (on average 21.666666666666668) internal successors, (130), 6 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:03:31,873 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:03:31,873 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 51 [2024-06-21 16:03:31,873 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:03:33,665 INFO L124 PetriNetUnfolderBase]: 7736/11488 cut-off events. [2024-06-21 16:03:33,665 INFO L125 PetriNetUnfolderBase]: For 716309/716466 co-relation queries the response was YES. [2024-06-21 16:03:33,913 INFO L83 FinitePrefix]: Finished finitePrefix Result has 87873 conditions, 11488 events. 7736/11488 cut-off events. For 716309/716466 co-relation queries the response was YES. Maximal size of possible extension queue 485. Compared 69996 event pairs, 2364 based on Foata normal form. 65/11327 useless extension candidates. Maximal degree in co-relation 87761. Up to 10096 conditions per place. [2024-06-21 16:03:33,977 INFO L140 encePairwiseOnDemand]: 43/51 looper letters, 295 selfloop transitions, 45 changer transitions 0/400 dead transitions. [2024-06-21 16:03:33,977 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 245 places, 400 transitions, 5689 flow [2024-06-21 16:03:33,978 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-21 16:03:33,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-21 16:03:33,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 151 transitions. [2024-06-21 16:03:33,978 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.592156862745098 [2024-06-21 16:03:33,978 INFO L175 Difference]: Start difference. First operand has 241 places, 384 transitions, 4913 flow. Second operand 5 states and 151 transitions. [2024-06-21 16:03:33,979 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 245 places, 400 transitions, 5689 flow [2024-06-21 16:03:35,435 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 243 places, 400 transitions, 5569 flow, removed 27 selfloop flow, removed 2 redundant places. [2024-06-21 16:03:35,440 INFO L231 Difference]: Finished difference. Result has 244 places, 388 transitions, 4964 flow [2024-06-21 16:03:35,441 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=4799, PETRI_DIFFERENCE_MINUEND_PLACES=239, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=384, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=339, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=4964, PETRI_PLACES=244, PETRI_TRANSITIONS=388} [2024-06-21 16:03:35,441 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 190 predicate places. [2024-06-21 16:03:35,441 INFO L495 AbstractCegarLoop]: Abstraction has has 244 places, 388 transitions, 4964 flow [2024-06-21 16:03:35,441 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 21.666666666666668) internal successors, (130), 6 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:03:35,441 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:03:35,441 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:03:35,442 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2024-06-21 16:03:35,442 INFO L420 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 16:03:35,442 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:03:35,442 INFO L85 PathProgramCache]: Analyzing trace with hash -1659691711, now seen corresponding path program 1 times [2024-06-21 16:03:35,442 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:03:35,442 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1770440955] [2024-06-21 16:03:35,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:03:35,443 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:03:35,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:03:35,589 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:03:35,590 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:03:35,590 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1770440955] [2024-06-21 16:03:35,590 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1770440955] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:03:35,590 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:03:35,590 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 16:03:35,590 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1596364542] [2024-06-21 16:03:35,591 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:03:35,591 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 16:03:35,591 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:03:35,591 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 16:03:35,591 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-21 16:03:35,658 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 51 [2024-06-21 16:03:35,658 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 244 places, 388 transitions, 4964 flow. Second operand has 8 states, 8 states have (on average 19.875) internal successors, (159), 8 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:03:35,658 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:03:35,658 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 51 [2024-06-21 16:03:35,658 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:03:37,789 INFO L124 PetriNetUnfolderBase]: 8299/12372 cut-off events. [2024-06-21 16:03:37,790 INFO L125 PetriNetUnfolderBase]: For 713728/713734 co-relation queries the response was YES. [2024-06-21 16:03:37,882 INFO L83 FinitePrefix]: Finished finitePrefix Result has 92844 conditions, 12372 events. 8299/12372 cut-off events. For 713728/713734 co-relation queries the response was YES. Maximal size of possible extension queue 506. Compared 75510 event pairs, 2377 based on Foata normal form. 30/12397 useless extension candidates. Maximal degree in co-relation 92731. Up to 10750 conditions per place. [2024-06-21 16:03:37,936 INFO L140 encePairwiseOnDemand]: 41/51 looper letters, 383 selfloop transitions, 49 changer transitions 0/444 dead transitions. [2024-06-21 16:03:37,937 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 250 places, 444 transitions, 6289 flow [2024-06-21 16:03:37,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 16:03:37,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 16:03:37,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 221 transitions. [2024-06-21 16:03:37,938 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6190476190476191 [2024-06-21 16:03:37,938 INFO L175 Difference]: Start difference. First operand has 244 places, 388 transitions, 4964 flow. Second operand 7 states and 221 transitions. [2024-06-21 16:03:37,938 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 250 places, 444 transitions, 6289 flow [2024-06-21 16:03:39,691 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 247 places, 444 transitions, 6156 flow, removed 24 selfloop flow, removed 3 redundant places. [2024-06-21 16:03:39,696 INFO L231 Difference]: Finished difference. Result has 250 places, 399 transitions, 5108 flow [2024-06-21 16:03:39,696 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=4831, PETRI_DIFFERENCE_MINUEND_PLACES=241, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=388, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=342, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5108, PETRI_PLACES=250, PETRI_TRANSITIONS=399} [2024-06-21 16:03:39,697 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 196 predicate places. [2024-06-21 16:03:39,697 INFO L495 AbstractCegarLoop]: Abstraction has has 250 places, 399 transitions, 5108 flow [2024-06-21 16:03:39,697 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 19.875) internal successors, (159), 8 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:03:39,697 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:03:39,698 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:03:39,698 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2024-06-21 16:03:39,698 INFO L420 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 16:03:39,698 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:03:39,698 INFO L85 PathProgramCache]: Analyzing trace with hash -930269383, now seen corresponding path program 2 times [2024-06-21 16:03:39,698 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:03:39,698 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2064305260] [2024-06-21 16:03:39,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:03:39,699 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:03:39,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:03:39,857 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:03:39,857 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:03:39,858 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2064305260] [2024-06-21 16:03:39,858 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2064305260] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:03:39,858 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:03:39,858 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 16:03:39,858 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1132895057] [2024-06-21 16:03:39,858 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:03:39,858 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 16:03:39,858 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:03:39,859 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 16:03:39,859 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-21 16:03:39,921 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 51 [2024-06-21 16:03:39,922 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 250 places, 399 transitions, 5108 flow. Second operand has 8 states, 8 states have (on average 19.875) internal successors, (159), 8 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:03:39,922 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:03:39,922 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 51 [2024-06-21 16:03:39,922 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:03:42,029 INFO L124 PetriNetUnfolderBase]: 8455/12628 cut-off events. [2024-06-21 16:03:42,029 INFO L125 PetriNetUnfolderBase]: For 757393/757399 co-relation queries the response was YES. [2024-06-21 16:03:42,130 INFO L83 FinitePrefix]: Finished finitePrefix Result has 96027 conditions, 12628 events. 8455/12628 cut-off events. For 757393/757399 co-relation queries the response was YES. Maximal size of possible extension queue 528. Compared 77605 event pairs, 2617 based on Foata normal form. 38/12661 useless extension candidates. Maximal degree in co-relation 95911. Up to 11454 conditions per place. [2024-06-21 16:03:42,187 INFO L140 encePairwiseOnDemand]: 41/51 looper letters, 381 selfloop transitions, 42 changer transitions 0/435 dead transitions. [2024-06-21 16:03:42,188 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 256 places, 435 transitions, 6102 flow [2024-06-21 16:03:42,188 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 16:03:42,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 16:03:42,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 213 transitions. [2024-06-21 16:03:42,189 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5966386554621849 [2024-06-21 16:03:42,189 INFO L175 Difference]: Start difference. First operand has 250 places, 399 transitions, 5108 flow. Second operand 7 states and 213 transitions. [2024-06-21 16:03:42,189 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 256 places, 435 transitions, 6102 flow [2024-06-21 16:03:43,770 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 254 places, 435 transitions, 6017 flow, removed 21 selfloop flow, removed 2 redundant places. [2024-06-21 16:03:43,775 INFO L231 Difference]: Finished difference. Result has 255 places, 401 transitions, 5161 flow [2024-06-21 16:03:43,775 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=5025, PETRI_DIFFERENCE_MINUEND_PLACES=248, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=399, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=357, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5161, PETRI_PLACES=255, PETRI_TRANSITIONS=401} [2024-06-21 16:03:43,775 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 201 predicate places. [2024-06-21 16:03:43,776 INFO L495 AbstractCegarLoop]: Abstraction has has 255 places, 401 transitions, 5161 flow [2024-06-21 16:03:43,776 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 19.875) internal successors, (159), 8 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:03:43,776 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:03:43,776 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:03:43,776 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2024-06-21 16:03:43,776 INFO L420 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 16:03:43,776 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:03:43,777 INFO L85 PathProgramCache]: Analyzing trace with hash -1017109063, now seen corresponding path program 3 times [2024-06-21 16:03:43,777 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:03:43,777 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [484050002] [2024-06-21 16:03:43,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:03:43,777 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:03:43,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:03:43,926 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:03:43,926 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:03:43,926 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [484050002] [2024-06-21 16:03:43,926 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [484050002] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:03:43,926 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:03:43,927 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 16:03:43,927 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [994562075] [2024-06-21 16:03:43,927 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:03:43,927 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 16:03:43,927 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:03:43,927 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 16:03:43,928 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-21 16:03:43,983 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 51 [2024-06-21 16:03:43,984 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 255 places, 401 transitions, 5161 flow. Second operand has 8 states, 8 states have (on average 19.875) internal successors, (159), 8 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:03:43,984 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:03:43,984 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 51 [2024-06-21 16:03:43,984 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:03:46,161 INFO L124 PetriNetUnfolderBase]: 8567/12800 cut-off events. [2024-06-21 16:03:46,162 INFO L125 PetriNetUnfolderBase]: For 779786/779792 co-relation queries the response was YES. [2024-06-21 16:03:46,281 INFO L83 FinitePrefix]: Finished finitePrefix Result has 97687 conditions, 12800 events. 8567/12800 cut-off events. For 779786/779792 co-relation queries the response was YES. Maximal size of possible extension queue 540. Compared 78932 event pairs, 2603 based on Foata normal form. 30/12825 useless extension candidates. Maximal degree in co-relation 97569. Up to 11452 conditions per place. [2024-06-21 16:03:46,566 INFO L140 encePairwiseOnDemand]: 41/51 looper letters, 384 selfloop transitions, 46 changer transitions 0/442 dead transitions. [2024-06-21 16:03:46,566 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 261 places, 442 transitions, 6207 flow [2024-06-21 16:03:46,566 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 16:03:46,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 16:03:46,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 216 transitions. [2024-06-21 16:03:46,567 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6050420168067226 [2024-06-21 16:03:46,567 INFO L175 Difference]: Start difference. First operand has 255 places, 401 transitions, 5161 flow. Second operand 7 states and 216 transitions. [2024-06-21 16:03:46,567 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 261 places, 442 transitions, 6207 flow [2024-06-21 16:03:47,814 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 256 places, 442 transitions, 6107 flow, removed 10 selfloop flow, removed 5 redundant places. [2024-06-21 16:03:47,819 INFO L231 Difference]: Finished difference. Result has 258 places, 405 transitions, 5240 flow [2024-06-21 16:03:47,820 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=5061, PETRI_DIFFERENCE_MINUEND_PLACES=250, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=401, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=356, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5240, PETRI_PLACES=258, PETRI_TRANSITIONS=405} [2024-06-21 16:03:47,820 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 204 predicate places. [2024-06-21 16:03:47,820 INFO L495 AbstractCegarLoop]: Abstraction has has 258 places, 405 transitions, 5240 flow [2024-06-21 16:03:47,820 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 19.875) internal successors, (159), 8 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:03:47,820 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:03:47,821 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:03:47,821 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64 [2024-06-21 16:03:47,821 INFO L420 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 16:03:47,821 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:03:47,821 INFO L85 PathProgramCache]: Analyzing trace with hash -53569275, now seen corresponding path program 4 times [2024-06-21 16:03:47,821 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:03:47,821 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [995702700] [2024-06-21 16:03:47,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:03:47,822 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:03:47,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:03:47,984 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:03:47,985 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:03:47,985 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [995702700] [2024-06-21 16:03:47,985 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [995702700] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:03:47,985 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:03:47,985 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 16:03:47,985 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [67567638] [2024-06-21 16:03:47,985 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:03:47,986 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 16:03:47,986 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:03:47,986 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 16:03:47,986 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-21 16:03:48,050 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 51 [2024-06-21 16:03:48,051 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 258 places, 405 transitions, 5240 flow. Second operand has 8 states, 8 states have (on average 19.875) internal successors, (159), 8 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:03:48,051 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:03:48,051 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 51 [2024-06-21 16:03:48,051 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:03:50,207 INFO L124 PetriNetUnfolderBase]: 8725/13040 cut-off events. [2024-06-21 16:03:50,207 INFO L125 PetriNetUnfolderBase]: For 822064/822072 co-relation queries the response was YES. [2024-06-21 16:03:50,309 INFO L83 FinitePrefix]: Finished finitePrefix Result has 99901 conditions, 13040 events. 8725/13040 cut-off events. For 822064/822072 co-relation queries the response was YES. Maximal size of possible extension queue 563. Compared 80666 event pairs, 2645 based on Foata normal form. 40/13077 useless extension candidates. Maximal degree in co-relation 99781. Up to 11898 conditions per place. [2024-06-21 16:03:50,592 INFO L140 encePairwiseOnDemand]: 41/51 looper letters, 394 selfloop transitions, 39 changer transitions 0/445 dead transitions. [2024-06-21 16:03:50,592 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 265 places, 445 transitions, 6270 flow [2024-06-21 16:03:50,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:03:50,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:03:50,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 238 transitions. [2024-06-21 16:03:50,593 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5833333333333334 [2024-06-21 16:03:50,593 INFO L175 Difference]: Start difference. First operand has 258 places, 405 transitions, 5240 flow. Second operand 8 states and 238 transitions. [2024-06-21 16:03:50,593 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 265 places, 445 transitions, 6270 flow [2024-06-21 16:03:52,072 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 262 places, 445 transitions, 6195 flow, removed 15 selfloop flow, removed 3 redundant places. [2024-06-21 16:03:52,079 INFO L231 Difference]: Finished difference. Result has 263 places, 407 transitions, 5303 flow [2024-06-21 16:03:52,079 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=5165, PETRI_DIFFERENCE_MINUEND_PLACES=255, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=405, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=366, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5303, PETRI_PLACES=263, PETRI_TRANSITIONS=407} [2024-06-21 16:03:52,080 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 209 predicate places. [2024-06-21 16:03:52,080 INFO L495 AbstractCegarLoop]: Abstraction has has 263 places, 407 transitions, 5303 flow [2024-06-21 16:03:52,080 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 19.875) internal successors, (159), 8 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:03:52,080 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:03:52,081 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:03:52,081 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65 [2024-06-21 16:03:52,081 INFO L420 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 16:03:52,081 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:03:52,081 INFO L85 PathProgramCache]: Analyzing trace with hash -58931655, now seen corresponding path program 5 times [2024-06-21 16:03:52,081 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:03:52,082 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1122487766] [2024-06-21 16:03:52,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:03:52,082 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:03:52,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:03:52,262 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:03:52,263 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:03:52,263 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1122487766] [2024-06-21 16:03:52,263 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1122487766] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:03:52,263 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:03:52,263 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 16:03:52,263 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1992054785] [2024-06-21 16:03:52,263 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:03:52,263 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 16:03:52,264 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:03:52,264 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 16:03:52,264 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-21 16:03:52,307 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 51 [2024-06-21 16:03:52,307 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 263 places, 407 transitions, 5303 flow. Second operand has 8 states, 8 states have (on average 19.875) internal successors, (159), 8 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:03:52,308 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:03:52,308 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 51 [2024-06-21 16:03:52,308 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:03:54,564 INFO L124 PetriNetUnfolderBase]: 8815/13200 cut-off events. [2024-06-21 16:03:54,564 INFO L125 PetriNetUnfolderBase]: For 845136/845142 co-relation queries the response was YES. [2024-06-21 16:03:54,670 INFO L83 FinitePrefix]: Finished finitePrefix Result has 101165 conditions, 13200 events. 8815/13200 cut-off events. For 845136/845142 co-relation queries the response was YES. Maximal size of possible extension queue 575. Compared 81999 event pairs, 2687 based on Foata normal form. 38/13233 useless extension candidates. Maximal degree in co-relation 101043. Up to 12042 conditions per place. [2024-06-21 16:03:54,731 INFO L140 encePairwiseOnDemand]: 41/51 looper letters, 392 selfloop transitions, 35 changer transitions 0/439 dead transitions. [2024-06-21 16:03:54,732 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 268 places, 439 transitions, 6305 flow [2024-06-21 16:03:54,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 16:03:54,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 16:03:54,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 187 transitions. [2024-06-21 16:03:54,733 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6111111111111112 [2024-06-21 16:03:54,733 INFO L175 Difference]: Start difference. First operand has 263 places, 407 transitions, 5303 flow. Second operand 6 states and 187 transitions. [2024-06-21 16:03:54,733 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 268 places, 439 transitions, 6305 flow [2024-06-21 16:03:56,532 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 262 places, 439 transitions, 6205 flow, removed 13 selfloop flow, removed 6 redundant places. [2024-06-21 16:03:56,537 INFO L231 Difference]: Finished difference. Result has 263 places, 409 transitions, 5337 flow [2024-06-21 16:03:56,537 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=5203, PETRI_DIFFERENCE_MINUEND_PLACES=257, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=407, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=372, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=5337, PETRI_PLACES=263, PETRI_TRANSITIONS=409} [2024-06-21 16:03:56,537 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 209 predicate places. [2024-06-21 16:03:56,537 INFO L495 AbstractCegarLoop]: Abstraction has has 263 places, 409 transitions, 5337 flow [2024-06-21 16:03:56,538 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 19.875) internal successors, (159), 8 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:03:56,538 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:03:56,538 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:03:56,538 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66 [2024-06-21 16:03:56,538 INFO L420 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 16:03:56,538 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:03:56,538 INFO L85 PathProgramCache]: Analyzing trace with hash -59079525, now seen corresponding path program 6 times [2024-06-21 16:03:56,539 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:03:56,539 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1904910188] [2024-06-21 16:03:56,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:03:56,539 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:03:56,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:03:56,700 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:03:56,701 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:03:56,701 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1904910188] [2024-06-21 16:03:56,701 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1904910188] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:03:56,701 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:03:56,701 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 16:03:56,701 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [732885793] [2024-06-21 16:03:56,701 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:03:56,701 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 16:03:56,702 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:03:56,702 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 16:03:56,702 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-21 16:03:56,799 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 51 [2024-06-21 16:03:56,799 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 263 places, 409 transitions, 5337 flow. Second operand has 8 states, 8 states have (on average 19.875) internal successors, (159), 8 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:03:56,799 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:03:56,799 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 51 [2024-06-21 16:03:56,799 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:03:59,176 INFO L124 PetriNetUnfolderBase]: 8763/13124 cut-off events. [2024-06-21 16:03:59,176 INFO L125 PetriNetUnfolderBase]: For 832109/832115 co-relation queries the response was YES. [2024-06-21 16:03:59,281 INFO L83 FinitePrefix]: Finished finitePrefix Result has 99756 conditions, 13124 events. 8763/13124 cut-off events. For 832109/832115 co-relation queries the response was YES. Maximal size of possible extension queue 571. Compared 81405 event pairs, 2439 based on Foata normal form. 30/13149 useless extension candidates. Maximal degree in co-relation 99633. Up to 11548 conditions per place. [2024-06-21 16:03:59,349 INFO L140 encePairwiseOnDemand]: 41/51 looper letters, 392 selfloop transitions, 43 changer transitions 0/447 dead transitions. [2024-06-21 16:03:59,350 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 268 places, 447 transitions, 6353 flow [2024-06-21 16:03:59,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 16:03:59,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 16:03:59,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 193 transitions. [2024-06-21 16:03:59,350 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.630718954248366 [2024-06-21 16:03:59,351 INFO L175 Difference]: Start difference. First operand has 263 places, 409 transitions, 5337 flow. Second operand 6 states and 193 transitions. [2024-06-21 16:03:59,351 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 268 places, 447 transitions, 6353 flow [2024-06-21 16:04:01,112 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 264 places, 447 transitions, 6241 flow, removed 23 selfloop flow, removed 4 redundant places. [2024-06-21 16:04:01,117 INFO L231 Difference]: Finished difference. Result has 266 places, 411 transitions, 5363 flow [2024-06-21 16:04:01,117 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=5229, PETRI_DIFFERENCE_MINUEND_PLACES=259, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=409, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=367, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=5363, PETRI_PLACES=266, PETRI_TRANSITIONS=411} [2024-06-21 16:04:01,118 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 212 predicate places. [2024-06-21 16:04:01,118 INFO L495 AbstractCegarLoop]: Abstraction has has 266 places, 411 transitions, 5363 flow [2024-06-21 16:04:01,118 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 19.875) internal successors, (159), 8 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:04:01,118 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:04:01,118 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:04:01,118 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67 [2024-06-21 16:04:01,118 INFO L420 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 16:04:01,119 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:04:01,119 INFO L85 PathProgramCache]: Analyzing trace with hash -53354073, now seen corresponding path program 1 times [2024-06-21 16:04:01,119 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:04:01,119 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1271012282] [2024-06-21 16:04:01,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:04:01,119 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:04:01,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:04:01,275 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:04:01,275 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:04:01,275 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1271012282] [2024-06-21 16:04:01,275 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1271012282] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:04:01,275 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:04:01,275 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 16:04:01,276 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2143227484] [2024-06-21 16:04:01,276 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:04:01,276 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 16:04:01,276 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:04:01,276 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 16:04:01,276 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-21 16:04:01,353 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 51 [2024-06-21 16:04:01,354 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 266 places, 411 transitions, 5363 flow. Second operand has 8 states, 8 states have (on average 19.875) internal successors, (159), 8 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:04:01,354 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:04:01,354 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 51 [2024-06-21 16:04:01,354 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:04:03,687 INFO L124 PetriNetUnfolderBase]: 8713/13044 cut-off events. [2024-06-21 16:04:03,687 INFO L125 PetriNetUnfolderBase]: For 824867/824875 co-relation queries the response was YES. [2024-06-21 16:04:03,800 INFO L83 FinitePrefix]: Finished finitePrefix Result has 98460 conditions, 13044 events. 8713/13044 cut-off events. For 824867/824875 co-relation queries the response was YES. Maximal size of possible extension queue 567. Compared 80694 event pairs, 2522 based on Foata normal form. 32/13073 useless extension candidates. Maximal degree in co-relation 98335. Up to 11476 conditions per place. [2024-06-21 16:04:03,870 INFO L140 encePairwiseOnDemand]: 41/51 looper letters, 394 selfloop transitions, 48 changer transitions 0/454 dead transitions. [2024-06-21 16:04:03,870 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 273 places, 454 transitions, 6419 flow [2024-06-21 16:04:03,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:04:03,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:04:03,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 241 transitions. [2024-06-21 16:04:03,872 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5906862745098039 [2024-06-21 16:04:03,872 INFO L175 Difference]: Start difference. First operand has 266 places, 411 transitions, 5363 flow. Second operand 8 states and 241 transitions. [2024-06-21 16:04:03,872 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 273 places, 454 transitions, 6419 flow [2024-06-21 16:04:05,406 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 268 places, 454 transitions, 6260 flow, removed 15 selfloop flow, removed 5 redundant places. [2024-06-21 16:04:05,411 INFO L231 Difference]: Finished difference. Result has 269 places, 413 transitions, 5351 flow [2024-06-21 16:04:05,411 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=5204, PETRI_DIFFERENCE_MINUEND_PLACES=261, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=411, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=363, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5351, PETRI_PLACES=269, PETRI_TRANSITIONS=413} [2024-06-21 16:04:05,412 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 215 predicate places. [2024-06-21 16:04:05,412 INFO L495 AbstractCegarLoop]: Abstraction has has 269 places, 413 transitions, 5351 flow [2024-06-21 16:04:05,412 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 19.875) internal successors, (159), 8 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:04:05,412 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:04:05,412 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:04:05,412 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68 [2024-06-21 16:04:05,413 INFO L420 AbstractCegarLoop]: === Iteration 70 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 16:04:05,413 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:04:05,413 INFO L85 PathProgramCache]: Analyzing trace with hash -1085796766, now seen corresponding path program 1 times [2024-06-21 16:04:05,413 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:04:05,413 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1557201142] [2024-06-21 16:04:05,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:04:05,413 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:04:05,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:04:05,548 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:04:05,548 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:04:05,548 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1557201142] [2024-06-21 16:04:05,549 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1557201142] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:04:05,549 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:04:05,549 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 16:04:05,549 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [360017553] [2024-06-21 16:04:05,549 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:04:05,549 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 16:04:05,549 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:04:05,550 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 16:04:05,550 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-21 16:04:05,597 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 51 [2024-06-21 16:04:05,598 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 269 places, 413 transitions, 5351 flow. Second operand has 6 states, 6 states have (on average 21.666666666666668) internal successors, (130), 6 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:04:05,598 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:04:05,598 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 51 [2024-06-21 16:04:05,598 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand