./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.2024-05-21_14-57-05.files/protection/thin002_pso.oepc_pso.opt_tso.oepc_tso.opt.yml/witness.yml --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version bcb38a6f 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.2024-05-21_14-57-05.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-bcb38a6-m [2024-06-04 14:26:08,709 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-04 14:26:08,761 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-04 14:26:08,769 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-04 14:26:08,769 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-04 14:26:08,792 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-04 14:26:08,795 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-04 14:26:08,795 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-04 14:26:08,796 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-04 14:26:08,799 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-04 14:26:08,799 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-04 14:26:08,800 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-04 14:26:08,800 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-04 14:26:08,801 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-04 14:26:08,801 INFO L153 SettingsManager]: * Use SBE=true [2024-06-04 14:26:08,802 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-04 14:26:08,802 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-04 14:26:08,802 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-04 14:26:08,802 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-04 14:26:08,802 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-04 14:26:08,803 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-04 14:26:08,803 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-04 14:26:08,803 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-04 14:26:08,803 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-04 14:26:08,804 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-04 14:26:08,804 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-04 14:26:08,804 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-04 14:26:08,804 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-04 14:26:08,805 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-04 14:26:08,805 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-04 14:26:08,806 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-04 14:26:08,806 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-04 14:26:08,806 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-04 14:26:08,806 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-04 14:26:08,806 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-04 14:26:08,807 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-04 14:26:08,807 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-04 14:26:08,807 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-04 14:26:08,807 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-04 14:26:08,807 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-04 14:26:08,807 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-04 14:26:08,808 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-04 14:26:08,808 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-04 14:26:08,808 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false [2024-06-04 14:26:09,060 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-04 14:26:09,079 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-04 14:26:09,080 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-04 14:26:09,081 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-06-04 14:26:09,082 INFO L274 PluginConnector]: Witness Parser initialized [2024-06-04 14:26:09,083 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-05-21_14-57-05.files/protection/thin002_pso.oepc_pso.opt_tso.oepc_tso.opt.yml/witness.yml [2024-06-04 14:26:09,186 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-04 14:26:09,188 INFO L274 PluginConnector]: CDTParser initialized [2024-06-04 14:26:09,188 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/thin002_pso.oepc_pso.opt_tso.oepc_tso.opt.i [2024-06-04 14:26:10,234 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-04 14:26:10,452 INFO L384 CDTParser]: Found 1 translation units. [2024-06-04 14:26:10,452 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/thin002_pso.oepc_pso.opt_tso.oepc_tso.opt.i [2024-06-04 14:26:10,467 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/852d9fe8f/9d66591cb86740b783d715e9a0444c5a/FLAG6fc3b83f5 [2024-06-04 14:26:10,477 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/852d9fe8f/9d66591cb86740b783d715e9a0444c5a [2024-06-04 14:26:10,478 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-04 14:26:10,478 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-06-04 14:26:10,485 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-04 14:26:10,485 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-04 14:26:10,489 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-04 14:26:10,490 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 04.06 02:26:09" (1/2) ... [2024-06-04 14:26:10,491 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7818a6ca and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 04.06 02:26:10, skipping insertion in model container [2024-06-04 14:26:10,491 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 04.06 02:26:09" (1/2) ... [2024-06-04 14:26:10,492 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@107812f8 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 04.06 02:26:10, skipping insertion in model container [2024-06-04 14:26:10,492 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.06 02:26:10" (2/2) ... [2024-06-04 14:26:10,493 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7818a6ca and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.06 02:26:10, skipping insertion in model container [2024-06-04 14:26:10,494 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.06 02:26:10" (2/2) ... [2024-06-04 14:26:10,495 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-06-04 14:26:10,550 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-06-04 14:26:10,551 INFO L97 edCorrectnessWitness]: Location invariant before [L808-L808] ((((((((! multithreaded || ((0 <= a && a <= 1) && (a == 0 || a == 1))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || ((0 <= y && y <= 1) && (y == 0 || y == 1)))) && (! multithreaded || ((0 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 1) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)))) && (! multithreaded || ((0 <= __unbuffered_p3_EAX && __unbuffered_p3_EAX <= 1) && (__unbuffered_p3_EAX == 0 || __unbuffered_p3_EAX == 1)))) && (! multithreaded || ((0 <= __unbuffered_p1_EAX && __unbuffered_p1_EAX <= 1) && (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1)))) && (! multithreaded || ((0 <= z && z <= 1) && (z == 0 || z == 1)))) && (! multithreaded || ((0 <= x && x <= 1) && (x == 0 || x == 1)))) && (! multithreaded || ((0 <= __unbuffered_p0_EAX && __unbuffered_p0_EAX <= 1) && (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1))) [2024-06-04 14:26:10,551 INFO L97 edCorrectnessWitness]: Location invariant before [L803-L803] ((((((((! multithreaded || ((0 <= a && a <= 1) && (a == 0 || a == 1))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || ((0 <= y && y <= 1) && (y == 0 || y == 1)))) && (! multithreaded || ((0 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 1) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)))) && (! multithreaded || ((0 <= __unbuffered_p3_EAX && __unbuffered_p3_EAX <= 1) && (__unbuffered_p3_EAX == 0 || __unbuffered_p3_EAX == 1)))) && (! multithreaded || ((0 <= __unbuffered_p1_EAX && __unbuffered_p1_EAX <= 1) && (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1)))) && (! multithreaded || ((0 <= z && z <= 1) && (z == 0 || z == 1)))) && (! multithreaded || ((0 <= x && x <= 1) && (x == 0 || x == 1)))) && (! multithreaded || ((0 <= __unbuffered_p0_EAX && __unbuffered_p0_EAX <= 1) && (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1))) [2024-06-04 14:26:10,552 INFO L97 edCorrectnessWitness]: Location invariant before [L807-L807] ((((((((! multithreaded || ((0 <= a && a <= 1) && (a == 0 || a == 1))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || ((0 <= y && y <= 1) && (y == 0 || y == 1)))) && (! multithreaded || ((0 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 1) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)))) && (! multithreaded || ((0 <= __unbuffered_p3_EAX && __unbuffered_p3_EAX <= 1) && (__unbuffered_p3_EAX == 0 || __unbuffered_p3_EAX == 1)))) && (! multithreaded || ((0 <= __unbuffered_p1_EAX && __unbuffered_p1_EAX <= 1) && (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1)))) && (! multithreaded || ((0 <= z && z <= 1) && (z == 0 || z == 1)))) && (! multithreaded || ((0 <= x && x <= 1) && (x == 0 || x == 1)))) && (! multithreaded || ((0 <= __unbuffered_p0_EAX && __unbuffered_p0_EAX <= 1) && (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1))) [2024-06-04 14:26:10,552 INFO L97 edCorrectnessWitness]: Location invariant before [L805-L805] ((((((((! multithreaded || ((0 <= a && a <= 1) && (a == 0 || a == 1))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || ((0 <= y && y <= 1) && (y == 0 || y == 1)))) && (! multithreaded || ((0 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 1) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)))) && (! multithreaded || ((0 <= __unbuffered_p3_EAX && __unbuffered_p3_EAX <= 1) && (__unbuffered_p3_EAX == 0 || __unbuffered_p3_EAX == 1)))) && (! multithreaded || ((0 <= __unbuffered_p1_EAX && __unbuffered_p1_EAX <= 1) && (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1)))) && (! multithreaded || ((0 <= z && z <= 1) && (z == 0 || z == 1)))) && (! multithreaded || ((0 <= x && x <= 1) && (x == 0 || x == 1)))) && (! multithreaded || ((0 <= __unbuffered_p0_EAX && __unbuffered_p0_EAX <= 1) && (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1))) [2024-06-04 14:26:10,552 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-06-04 14:26:10,552 INFO L106 edCorrectnessWitness]: ghost_update [L801-L801] multithreaded = 1; [2024-06-04 14:26:10,590 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-04 14:26:10,858 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-04 14:26:10,867 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-06-04 14:26:10,980 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-04 14:26:11,024 INFO L206 MainTranslator]: Completed translation [2024-06-04 14:26:11,025 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.06 02:26:11 WrapperNode [2024-06-04 14:26:11,025 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-04 14:26:11,026 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-04 14:26:11,026 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-04 14:26:11,026 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-04 14:26:11,032 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.06 02:26:11" (1/1) ... [2024-06-04 14:26:11,051 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.06 02:26:11" (1/1) ... [2024-06-04 14:26:11,087 INFO L138 Inliner]: procedures = 176, calls = 51, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 77 [2024-06-04 14:26:11,087 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-04 14:26:11,088 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-04 14:26:11,088 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-04 14:26:11,088 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-04 14:26:11,102 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.06 02:26:11" (1/1) ... [2024-06-04 14:26:11,102 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.06 02:26:11" (1/1) ... [2024-06-04 14:26:11,105 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.06 02:26:11" (1/1) ... [2024-06-04 14:26:11,117 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]. [2024-06-04 14:26:11,117 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.06 02:26:11" (1/1) ... [2024-06-04 14:26:11,117 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.06 02:26:11" (1/1) ... [2024-06-04 14:26:11,123 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.06 02:26:11" (1/1) ... [2024-06-04 14:26:11,125 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.06 02:26:11" (1/1) ... [2024-06-04 14:26:11,126 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.06 02:26:11" (1/1) ... [2024-06-04 14:26:11,127 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.06 02:26:11" (1/1) ... [2024-06-04 14:26:11,132 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-04 14:26:11,133 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-04 14:26:11,133 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-04 14:26:11,133 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-04 14:26:11,133 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.06 02:26:11" (1/1) ... [2024-06-04 14:26:11,138 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-04 14:26:11,144 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-04 14:26:11,178 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) [2024-06-04 14:26:11,189 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 [2024-06-04 14:26:11,247 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-06-04 14:26:11,248 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-04 14:26:11,248 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2024-06-04 14:26:11,261 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2024-06-04 14:26:11,261 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2024-06-04 14:26:11,261 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2024-06-04 14:26:11,261 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2024-06-04 14:26:11,262 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2024-06-04 14:26:11,262 INFO L130 BoogieDeclarations]: Found specification of procedure P3 [2024-06-04 14:26:11,262 INFO L138 BoogieDeclarations]: Found implementation of procedure P3 [2024-06-04 14:26:11,262 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-04 14:26:11,262 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-06-04 14:26:11,262 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-04 14:26:11,262 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-04 14:26:11,264 WARN L214 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2024-06-04 14:26:11,353 INFO L244 CfgBuilder]: Building ICFG [2024-06-04 14:26:11,355 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-04 14:26:11,604 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-04 14:26:11,605 INFO L293 CfgBuilder]: Performing block encoding [2024-06-04 14:26:11,673 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-04 14:26:11,673 INFO L320 CfgBuilder]: Removed 0 assume(true) statements. [2024-06-04 14:26:11,678 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.06 02:26:11 BoogieIcfgContainer [2024-06-04 14:26:11,678 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-04 14:26:11,680 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-04 14:26:11,680 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-04 14:26:11,682 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-04 14:26:11,682 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 04.06 02:26:09" (1/4) ... [2024-06-04 14:26:11,683 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3c888aa and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 04.06 02:26:11, skipping insertion in model container [2024-06-04 14:26:11,683 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 04.06 02:26:10" (2/4) ... [2024-06-04 14:26:11,683 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3c888aa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.06 02:26:11, skipping insertion in model container [2024-06-04 14:26:11,683 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.06 02:26:11" (3/4) ... [2024-06-04 14:26:11,684 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3c888aa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.06 02:26:11, skipping insertion in model container [2024-06-04 14:26:11,684 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.06 02:26:11" (4/4) ... [2024-06-04 14:26:11,685 INFO L112 eAbstractionObserver]: Analyzing ICFG thin002_pso.oepc_pso.opt_tso.oepc_tso.opt.i [2024-06-04 14:26:11,697 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-04 14:26:11,698 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 4 error locations. [2024-06-04 14:26:11,698 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-04 14:26:11,739 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-06-04 14:26:11,768 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 65 places, 52 transitions, 120 flow [2024-06-04 14:26:11,798 INFO L124 PetriNetUnfolderBase]: 0/48 cut-off events. [2024-06-04 14:26:11,798 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-04 14:26:11,800 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61 conditions, 48 events. 0/48 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. 0/44 useless extension candidates. Maximal degree in co-relation 0. Up to 1 conditions per place. [2024-06-04 14:26:11,800 INFO L82 GeneralOperation]: Start removeDead. Operand has 65 places, 52 transitions, 120 flow [2024-06-04 14:26:11,804 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 55 places, 42 transitions, 96 flow [2024-06-04 14:26:11,816 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-04 14:26:11,822 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;@275abde0, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-04 14:26:11,823 INFO L358 AbstractCegarLoop]: Starting to check reachability of 8 error locations. [2024-06-04 14:26:11,827 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-04 14:26:11,827 INFO L124 PetriNetUnfolderBase]: 0/6 cut-off events. [2024-06-04 14:26:11,827 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-04 14:26:11,827 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:26:11,828 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2024-06-04 14:26:11,828 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)] === [2024-06-04 14:26:11,832 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:26:11,832 INFO L85 PathProgramCache]: Analyzing trace with hash -1238650552, now seen corresponding path program 1 times [2024-06-04 14:26:11,839 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:26:11,839 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [622032134] [2024-06-04 14:26:11,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:26:11,840 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:26:11,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:26:12,336 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:26:12,336 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:26:12,337 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [622032134] [2024-06-04 14:26:12,337 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [622032134] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:26:12,338 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:26:12,338 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-06-04 14:26:12,339 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2018413307] [2024-06-04 14:26:12,339 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:26:12,346 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-04 14:26:12,349 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:26:12,372 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-04 14:26:12,373 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-04 14:26:12,408 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 52 [2024-06-04 14:26:12,411 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 42 transitions, 96 flow. Second operand has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:26:12,411 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:26:12,411 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 52 [2024-06-04 14:26:12,412 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:26:12,835 INFO L124 PetriNetUnfolderBase]: 2723/4078 cut-off events. [2024-06-04 14:26:12,836 INFO L125 PetriNetUnfolderBase]: For 81/81 co-relation queries the response was YES. [2024-06-04 14:26:12,845 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8080 conditions, 4078 events. 2723/4078 cut-off events. For 81/81 co-relation queries the response was YES. Maximal size of possible extension queue 215. Compared 22549 event pairs, 1898 based on Foata normal form. 1/3992 useless extension candidates. Maximal degree in co-relation 8064. Up to 3813 conditions per place. [2024-06-04 14:26:12,863 INFO L140 encePairwiseOnDemand]: 43/52 looper letters, 39 selfloop transitions, 5 changer transitions 0/56 dead transitions. [2024-06-04 14:26:12,863 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 56 transitions, 221 flow [2024-06-04 14:26:12,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-04 14:26:12,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-04 14:26:12,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 108 transitions. [2024-06-04 14:26:12,872 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6923076923076923 [2024-06-04 14:26:12,873 INFO L175 Difference]: Start difference. First operand has 55 places, 42 transitions, 96 flow. Second operand 3 states and 108 transitions. [2024-06-04 14:26:12,874 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 56 transitions, 221 flow [2024-06-04 14:26:12,876 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 56 transitions, 214 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-06-04 14:26:12,880 INFO L231 Difference]: Finished difference. Result has 54 places, 46 transitions, 131 flow [2024-06-04 14:26:12,882 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=92, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=131, PETRI_PLACES=54, PETRI_TRANSITIONS=46} [2024-06-04 14:26:12,884 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, -1 predicate places. [2024-06-04 14:26:12,884 INFO L495 AbstractCegarLoop]: Abstraction has has 54 places, 46 transitions, 131 flow [2024-06-04 14:26:12,885 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:26:12,885 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:26:12,885 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:26:12,885 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-04 14:26:12,886 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)] === [2024-06-04 14:26:12,886 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:26:12,886 INFO L85 PathProgramCache]: Analyzing trace with hash 1721547629, now seen corresponding path program 1 times [2024-06-04 14:26:12,886 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:26:12,886 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1253188142] [2024-06-04 14:26:12,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:26:12,887 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:26:12,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:26:13,154 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:26:13,154 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:26:13,154 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1253188142] [2024-06-04 14:26:13,155 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1253188142] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:26:13,155 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:26:13,155 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-04 14:26:13,155 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [660551083] [2024-06-04 14:26:13,155 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:26:13,157 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-04 14:26:13,157 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:26:13,158 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-04 14:26:13,158 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-04 14:26:13,203 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 52 [2024-06-04 14:26:13,204 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 46 transitions, 131 flow. Second operand has 5 states, 5 states have (on average 19.6) internal successors, (98), 5 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:26:13,204 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:26:13,204 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 52 [2024-06-04 14:26:13,204 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:26:13,665 INFO L124 PetriNetUnfolderBase]: 4389/6482 cut-off events. [2024-06-04 14:26:13,665 INFO L125 PetriNetUnfolderBase]: For 1055/1077 co-relation queries the response was YES. [2024-06-04 14:26:13,673 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14774 conditions, 6482 events. 4389/6482 cut-off events. For 1055/1077 co-relation queries the response was YES. Maximal size of possible extension queue 307. Compared 36434 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. [2024-06-04 14:26:13,697 INFO L140 encePairwiseOnDemand]: 42/52 looper letters, 56 selfloop transitions, 9 changer transitions 0/75 dead transitions. [2024-06-04 14:26:13,698 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 75 transitions, 344 flow [2024-06-04 14:26:13,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-04 14:26:13,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-04 14:26:13,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 137 transitions. [2024-06-04 14:26:13,702 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6586538461538461 [2024-06-04 14:26:13,702 INFO L175 Difference]: Start difference. First operand has 54 places, 46 transitions, 131 flow. Second operand 4 states and 137 transitions. [2024-06-04 14:26:13,702 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 75 transitions, 344 flow [2024-06-04 14:26:13,703 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 75 transitions, 336 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-04 14:26:13,705 INFO L231 Difference]: Finished difference. Result has 58 places, 54 transitions, 202 flow [2024-06-04 14:26:13,705 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=126, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=202, PETRI_PLACES=58, PETRI_TRANSITIONS=54} [2024-06-04 14:26:13,706 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 3 predicate places. [2024-06-04 14:26:13,706 INFO L495 AbstractCegarLoop]: Abstraction has has 58 places, 54 transitions, 202 flow [2024-06-04 14:26:13,708 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 19.6) internal successors, (98), 5 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:26:13,708 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:26:13,708 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:26:13,709 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-06-04 14:26:13,709 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)] === [2024-06-04 14:26:13,713 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:26:13,713 INFO L85 PathProgramCache]: Analyzing trace with hash -1846111926, now seen corresponding path program 1 times [2024-06-04 14:26:13,713 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:26:13,714 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1763627587] [2024-06-04 14:26:13,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:26:13,714 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:26:13,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:26:13,968 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:26:13,969 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:26:13,969 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1763627587] [2024-06-04 14:26:13,969 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1763627587] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:26:13,969 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:26:13,969 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-04 14:26:13,969 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2059537746] [2024-06-04 14:26:13,970 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:26:13,970 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-04 14:26:13,970 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:26:13,970 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-04 14:26:13,971 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-04 14:26:14,053 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 52 [2024-06-04 14:26:14,054 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 54 transitions, 202 flow. Second operand has 6 states, 6 states have (on average 19.5) internal successors, (117), 6 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:26:14,054 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:26:14,054 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 52 [2024-06-04 14:26:14,054 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:26:14,569 INFO L124 PetriNetUnfolderBase]: 4373/6454 cut-off events. [2024-06-04 14:26:14,570 INFO L125 PetriNetUnfolderBase]: For 3049/3136 co-relation queries the response was YES. [2024-06-04 14:26:14,579 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16582 conditions, 6454 events. 4373/6454 cut-off events. For 3049/3136 co-relation queries the response was YES. Maximal size of possible extension queue 307. Compared 36274 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. [2024-06-04 14:26:14,600 INFO L140 encePairwiseOnDemand]: 42/52 looper letters, 63 selfloop transitions, 12 changer transitions 0/85 dead transitions. [2024-06-04 14:26:14,600 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 85 transitions, 436 flow [2024-06-04 14:26:14,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-04 14:26:14,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-04 14:26:14,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 165 transitions. [2024-06-04 14:26:14,645 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6346153846153846 [2024-06-04 14:26:14,645 INFO L175 Difference]: Start difference. First operand has 58 places, 54 transitions, 202 flow. Second operand 5 states and 165 transitions. [2024-06-04 14:26:14,645 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 85 transitions, 436 flow [2024-06-04 14:26:14,648 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 85 transitions, 432 flow, removed 2 selfloop flow, removed 0 redundant places. [2024-06-04 14:26:14,649 INFO L231 Difference]: Finished difference. Result has 62 places, 56 transitions, 248 flow [2024-06-04 14:26:14,649 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=192, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=53, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=248, PETRI_PLACES=62, PETRI_TRANSITIONS=56} [2024-06-04 14:26:14,649 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 7 predicate places. [2024-06-04 14:26:14,650 INFO L495 AbstractCegarLoop]: Abstraction has has 62 places, 56 transitions, 248 flow [2024-06-04 14:26:14,650 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 19.5) internal successors, (117), 6 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:26:14,650 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:26:14,650 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:26:14,650 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-06-04 14:26:14,650 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)] === [2024-06-04 14:26:14,650 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:26:14,651 INFO L85 PathProgramCache]: Analyzing trace with hash 1305937115, now seen corresponding path program 1 times [2024-06-04 14:26:14,651 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:26:14,651 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1294327839] [2024-06-04 14:26:14,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:26:14,651 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:26:14,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:26:14,852 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:26:14,852 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:26:14,853 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1294327839] [2024-06-04 14:26:14,853 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1294327839] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:26:14,853 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:26:14,853 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-04 14:26:14,853 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [827666846] [2024-06-04 14:26:14,853 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:26:14,854 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-04 14:26:14,854 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:26:14,854 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-04 14:26:14,855 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-04 14:26:14,885 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 52 [2024-06-04 14:26:14,886 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 56 transitions, 248 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) [2024-06-04 14:26:14,886 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:26:14,886 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 52 [2024-06-04 14:26:14,886 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:26:15,384 INFO L124 PetriNetUnfolderBase]: 4310/6335 cut-off events. [2024-06-04 14:26:15,385 INFO L125 PetriNetUnfolderBase]: For 5513/5523 co-relation queries the response was YES. [2024-06-04 14:26:15,394 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17800 conditions, 6335 events. 4310/6335 cut-off events. For 5513/5523 co-relation queries the response was YES. Maximal size of possible extension queue 302. Compared 35990 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. [2024-06-04 14:26:15,411 INFO L140 encePairwiseOnDemand]: 43/52 looper letters, 63 selfloop transitions, 11 changer transitions 0/84 dead transitions. [2024-06-04 14:26:15,412 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 84 transitions, 500 flow [2024-06-04 14:26:15,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-04 14:26:15,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-04 14:26:15,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 132 transitions. [2024-06-04 14:26:15,413 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6346153846153846 [2024-06-04 14:26:15,413 INFO L175 Difference]: Start difference. First operand has 62 places, 56 transitions, 248 flow. Second operand 4 states and 132 transitions. [2024-06-04 14:26:15,413 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 84 transitions, 500 flow [2024-06-04 14:26:15,416 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 84 transitions, 464 flow, removed 5 selfloop flow, removed 3 redundant places. [2024-06-04 14:26:15,417 INFO L231 Difference]: Finished difference. Result has 64 places, 66 transitions, 325 flow [2024-06-04 14:26:15,417 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=218, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=56, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=325, PETRI_PLACES=64, PETRI_TRANSITIONS=66} [2024-06-04 14:26:15,417 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 9 predicate places. [2024-06-04 14:26:15,417 INFO L495 AbstractCegarLoop]: Abstraction has has 64 places, 66 transitions, 325 flow [2024-06-04 14:26:15,418 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) [2024-06-04 14:26:15,418 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:26:15,418 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:26:15,418 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-06-04 14:26:15,418 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)] === [2024-06-04 14:26:15,419 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:26:15,419 INFO L85 PathProgramCache]: Analyzing trace with hash -1413391936, now seen corresponding path program 1 times [2024-06-04 14:26:15,419 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:26:15,419 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1274918670] [2024-06-04 14:26:15,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:26:15,419 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:26:15,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:26:15,608 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:26:15,608 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:26:15,608 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1274918670] [2024-06-04 14:26:15,609 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1274918670] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:26:15,609 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:26:15,609 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-04 14:26:15,609 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2068690951] [2024-06-04 14:26:15,609 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:26:15,609 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-04 14:26:15,610 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:26:15,610 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-04 14:26:15,610 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-04 14:26:15,651 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 52 [2024-06-04 14:26:15,652 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 66 transitions, 325 flow. Second operand has 6 states, 6 states have (on average 20.0) internal successors, (120), 6 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:26:15,652 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:26:15,652 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 52 [2024-06-04 14:26:15,652 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:26:16,276 INFO L124 PetriNetUnfolderBase]: 5207/7677 cut-off events. [2024-06-04 14:26:16,277 INFO L125 PetriNetUnfolderBase]: For 11031/11297 co-relation queries the response was YES. [2024-06-04 14:26:16,293 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23683 conditions, 7677 events. 5207/7677 cut-off events. For 11031/11297 co-relation queries the response was YES. Maximal size of possible extension queue 363. Compared 44253 event pairs, 2250 based on Foata normal form. 57/7672 useless extension candidates. Maximal degree in co-relation 23660. Up to 7050 conditions per place. [2024-06-04 14:26:16,323 INFO L140 encePairwiseOnDemand]: 42/52 looper letters, 68 selfloop transitions, 25 changer transitions 0/105 dead transitions. [2024-06-04 14:26:16,324 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 105 transitions, 665 flow [2024-06-04 14:26:16,324 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-04 14:26:16,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-04 14:26:16,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 169 transitions. [2024-06-04 14:26:16,325 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.65 [2024-06-04 14:26:16,325 INFO L175 Difference]: Start difference. First operand has 64 places, 66 transitions, 325 flow. Second operand 5 states and 169 transitions. [2024-06-04 14:26:16,325 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 105 transitions, 665 flow [2024-06-04 14:26:16,332 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 105 transitions, 657 flow, removed 4 selfloop flow, removed 0 redundant places. [2024-06-04 14:26:16,334 INFO L231 Difference]: Finished difference. Result has 69 places, 74 transitions, 438 flow [2024-06-04 14:26:16,334 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=317, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=66, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=438, PETRI_PLACES=69, PETRI_TRANSITIONS=74} [2024-06-04 14:26:16,334 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 14 predicate places. [2024-06-04 14:26:16,335 INFO L495 AbstractCegarLoop]: Abstraction has has 69 places, 74 transitions, 438 flow [2024-06-04 14:26:16,335 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 20.0) internal successors, (120), 6 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:26:16,335 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:26:16,335 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:26:16,335 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-06-04 14:26:16,335 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)] === [2024-06-04 14:26:16,336 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:26:16,336 INFO L85 PathProgramCache]: Analyzing trace with hash -1402172416, now seen corresponding path program 2 times [2024-06-04 14:26:16,336 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:26:16,336 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1894032765] [2024-06-04 14:26:16,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:26:16,336 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:26:16,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:26:16,545 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:26:16,545 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:26:16,545 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1894032765] [2024-06-04 14:26:16,545 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1894032765] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:26:16,545 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:26:16,546 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-04 14:26:16,546 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [238790071] [2024-06-04 14:26:16,546 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:26:16,546 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-04 14:26:16,546 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:26:16,547 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-04 14:26:16,547 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-04 14:26:16,601 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 52 [2024-06-04 14:26:16,602 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 74 transitions, 438 flow. Second operand has 6 states, 6 states have (on average 20.0) internal successors, (120), 6 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:26:16,602 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:26:16,602 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 52 [2024-06-04 14:26:16,602 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:26:17,340 INFO L124 PetriNetUnfolderBase]: 5198/7665 cut-off events. [2024-06-04 14:26:17,340 INFO L125 PetriNetUnfolderBase]: For 17236/17544 co-relation queries the response was YES. [2024-06-04 14:26:17,353 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26021 conditions, 7665 events. 5198/7665 cut-off events. For 17236/17544 co-relation queries the response was YES. Maximal size of possible extension queue 363. Compared 44041 event pairs, 2250 based on Foata normal form. 65/7670 useless extension candidates. Maximal degree in co-relation 25995. Up to 7056 conditions per place. [2024-06-04 14:26:17,385 INFO L140 encePairwiseOnDemand]: 42/52 looper letters, 62 selfloop transitions, 21 changer transitions 0/95 dead transitions. [2024-06-04 14:26:17,385 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 95 transitions, 658 flow [2024-06-04 14:26:17,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-04 14:26:17,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-04 14:26:17,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 137 transitions. [2024-06-04 14:26:17,386 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6586538461538461 [2024-06-04 14:26:17,387 INFO L175 Difference]: Start difference. First operand has 69 places, 74 transitions, 438 flow. Second operand 4 states and 137 transitions. [2024-06-04 14:26:17,387 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 95 transitions, 658 flow [2024-06-04 14:26:17,398 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 95 transitions, 615 flow, removed 15 selfloop flow, removed 1 redundant places. [2024-06-04 14:26:17,399 INFO L231 Difference]: Finished difference. Result has 72 places, 74 transitions, 455 flow [2024-06-04 14:26:17,399 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=395, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=74, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=455, PETRI_PLACES=72, PETRI_TRANSITIONS=74} [2024-06-04 14:26:17,400 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 17 predicate places. [2024-06-04 14:26:17,400 INFO L495 AbstractCegarLoop]: Abstraction has has 72 places, 74 transitions, 455 flow [2024-06-04 14:26:17,400 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 20.0) internal successors, (120), 6 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:26:17,400 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:26:17,400 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:26:17,401 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-06-04 14:26:17,401 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)] === [2024-06-04 14:26:17,401 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:26:17,401 INFO L85 PathProgramCache]: Analyzing trace with hash -1343067912, now seen corresponding path program 1 times [2024-06-04 14:26:17,401 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:26:17,401 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1064982519] [2024-06-04 14:26:17,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:26:17,402 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:26:17,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:26:17,589 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:26:17,590 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:26:17,590 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1064982519] [2024-06-04 14:26:17,590 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1064982519] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:26:17,590 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:26:17,590 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-04 14:26:17,590 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1981552336] [2024-06-04 14:26:17,591 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:26:17,591 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-04 14:26:17,591 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:26:17,591 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-04 14:26:17,592 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-04 14:26:17,631 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 52 [2024-06-04 14:26:17,631 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 74 transitions, 455 flow. Second operand has 6 states, 6 states have (on average 20.0) internal successors, (120), 6 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:26:17,631 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:26:17,631 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 52 [2024-06-04 14:26:17,631 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:26:18,194 INFO L124 PetriNetUnfolderBase]: 4317/6351 cut-off events. [2024-06-04 14:26:18,195 INFO L125 PetriNetUnfolderBase]: For 15941/15980 co-relation queries the response was YES. [2024-06-04 14:26:18,209 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22023 conditions, 6351 events. 4317/6351 cut-off events. For 15941/15980 co-relation queries the response was YES. Maximal size of possible extension queue 302. Compared 36181 event pairs, 2074 based on Foata normal form. 19/6357 useless extension candidates. Maximal degree in co-relation 21995. Up to 5913 conditions per place. [2024-06-04 14:26:18,233 INFO L140 encePairwiseOnDemand]: 43/52 looper letters, 79 selfloop transitions, 14 changer transitions 0/103 dead transitions. [2024-06-04 14:26:18,233 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 103 transitions, 732 flow [2024-06-04 14:26:18,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-04 14:26:18,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-04 14:26:18,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 161 transitions. [2024-06-04 14:26:18,234 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6192307692307693 [2024-06-04 14:26:18,235 INFO L175 Difference]: Start difference. First operand has 72 places, 74 transitions, 455 flow. Second operand 5 states and 161 transitions. [2024-06-04 14:26:18,235 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 103 transitions, 732 flow [2024-06-04 14:26:18,241 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 103 transitions, 690 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-06-04 14:26:18,242 INFO L231 Difference]: Finished difference. Result has 74 places, 77 transitions, 479 flow [2024-06-04 14:26:18,243 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=413, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=74, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=479, PETRI_PLACES=74, PETRI_TRANSITIONS=77} [2024-06-04 14:26:18,243 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 19 predicate places. [2024-06-04 14:26:18,243 INFO L495 AbstractCegarLoop]: Abstraction has has 74 places, 77 transitions, 479 flow [2024-06-04 14:26:18,244 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 20.0) internal successors, (120), 6 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:26:18,244 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:26:18,244 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:26:18,244 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-06-04 14:26:18,244 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)] === [2024-06-04 14:26:18,244 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:26:18,245 INFO L85 PathProgramCache]: Analyzing trace with hash 152893862, now seen corresponding path program 1 times [2024-06-04 14:26:18,245 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:26:18,245 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1445786073] [2024-06-04 14:26:18,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:26:18,245 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:26:18,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:26:18,449 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:26:18,449 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:26:18,449 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1445786073] [2024-06-04 14:26:18,450 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1445786073] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:26:18,450 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:26:18,450 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-04 14:26:18,450 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [971928303] [2024-06-04 14:26:18,450 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:26:18,450 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-04 14:26:18,451 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:26:18,451 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-04 14:26:18,451 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-04 14:26:18,493 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 52 [2024-06-04 14:26:18,494 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 77 transitions, 479 flow. Second operand has 7 states, 7 states have (on average 18.857142857142858) internal successors, (132), 7 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:26:18,494 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:26:18,494 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 52 [2024-06-04 14:26:18,494 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:26:19,111 INFO L124 PetriNetUnfolderBase]: 5487/8006 cut-off events. [2024-06-04 14:26:19,112 INFO L125 PetriNetUnfolderBase]: For 24508/24685 co-relation queries the response was YES. [2024-06-04 14:26:19,133 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28818 conditions, 8006 events. 5487/8006 cut-off events. For 24508/24685 co-relation queries the response was YES. Maximal size of possible extension queue 354. Compared 45276 event pairs, 2358 based on Foata normal form. 40/8021 useless extension candidates. Maximal degree in co-relation 28789. Up to 7366 conditions per place. [2024-06-04 14:26:19,163 INFO L140 encePairwiseOnDemand]: 41/52 looper letters, 98 selfloop transitions, 27 changer transitions 0/134 dead transitions. [2024-06-04 14:26:19,163 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 134 transitions, 999 flow [2024-06-04 14:26:19,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-04 14:26:19,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-04 14:26:19,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 195 transitions. [2024-06-04 14:26:19,165 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.625 [2024-06-04 14:26:19,165 INFO L175 Difference]: Start difference. First operand has 74 places, 77 transitions, 479 flow. Second operand 6 states and 195 transitions. [2024-06-04 14:26:19,165 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 134 transitions, 999 flow [2024-06-04 14:26:19,178 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 134 transitions, 959 flow, removed 8 selfloop flow, removed 3 redundant places. [2024-06-04 14:26:19,179 INFO L231 Difference]: Finished difference. Result has 79 places, 94 transitions, 667 flow [2024-06-04 14:26:19,180 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=439, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=77, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=667, PETRI_PLACES=79, PETRI_TRANSITIONS=94} [2024-06-04 14:26:19,180 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 24 predicate places. [2024-06-04 14:26:19,180 INFO L495 AbstractCegarLoop]: Abstraction has has 79 places, 94 transitions, 667 flow [2024-06-04 14:26:19,180 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.857142857142858) internal successors, (132), 7 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:26:19,181 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:26:19,181 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:26:19,181 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-06-04 14:26:19,181 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)] === [2024-06-04 14:26:19,181 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:26:19,181 INFO L85 PathProgramCache]: Analyzing trace with hash -517664846, now seen corresponding path program 2 times [2024-06-04 14:26:19,182 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:26:19,182 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1433390977] [2024-06-04 14:26:19,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:26:19,182 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:26:19,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:26:19,416 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:26:19,416 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:26:19,416 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1433390977] [2024-06-04 14:26:19,416 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1433390977] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:26:19,417 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:26:19,417 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-04 14:26:19,417 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1323134336] [2024-06-04 14:26:19,417 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:26:19,417 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-04 14:26:19,417 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:26:19,418 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-04 14:26:19,418 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-04 14:26:19,466 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 52 [2024-06-04 14:26:19,466 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 94 transitions, 667 flow. Second operand has 7 states, 7 states have (on average 18.857142857142858) internal successors, (132), 7 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:26:19,466 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:26:19,467 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 52 [2024-06-04 14:26:19,467 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:26:20,178 INFO L124 PetriNetUnfolderBase]: 5509/8052 cut-off events. [2024-06-04 14:26:20,178 INFO L125 PetriNetUnfolderBase]: For 32038/32364 co-relation queries the response was YES. [2024-06-04 14:26:20,202 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31089 conditions, 8052 events. 5509/8052 cut-off events. For 32038/32364 co-relation queries the response was YES. Maximal size of possible extension queue 355. Compared 45539 event pairs, 2336 based on Foata normal form. 81/8115 useless extension candidates. Maximal degree in co-relation 31057. Up to 7419 conditions per place. [2024-06-04 14:26:20,235 INFO L140 encePairwiseOnDemand]: 41/52 looper letters, 112 selfloop transitions, 26 changer transitions 0/147 dead transitions. [2024-06-04 14:26:20,236 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 85 places, 147 transitions, 1168 flow [2024-06-04 14:26:20,236 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 14:26:20,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 14:26:20,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 222 transitions. [2024-06-04 14:26:20,237 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6098901098901099 [2024-06-04 14:26:20,237 INFO L175 Difference]: Start difference. First operand has 79 places, 94 transitions, 667 flow. Second operand 7 states and 222 transitions. [2024-06-04 14:26:20,237 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 85 places, 147 transitions, 1168 flow [2024-06-04 14:26:20,259 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 83 places, 147 transitions, 1114 flow, removed 17 selfloop flow, removed 2 redundant places. [2024-06-04 14:26:20,261 INFO L231 Difference]: Finished difference. Result has 85 places, 100 transitions, 743 flow [2024-06-04 14:26:20,261 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=617, PETRI_DIFFERENCE_MINUEND_PLACES=77, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=94, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=743, PETRI_PLACES=85, PETRI_TRANSITIONS=100} [2024-06-04 14:26:20,262 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 30 predicate places. [2024-06-04 14:26:20,262 INFO L495 AbstractCegarLoop]: Abstraction has has 85 places, 100 transitions, 743 flow [2024-06-04 14:26:20,262 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.857142857142858) internal successors, (132), 7 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:26:20,262 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:26:20,262 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:26:20,263 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-06-04 14:26:20,263 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)] === [2024-06-04 14:26:20,263 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:26:20,263 INFO L85 PathProgramCache]: Analyzing trace with hash -517670426, now seen corresponding path program 3 times [2024-06-04 14:26:20,263 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:26:20,263 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1613634512] [2024-06-04 14:26:20,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:26:20,264 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:26:20,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:26:20,496 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:26:20,496 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:26:20,497 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1613634512] [2024-06-04 14:26:20,497 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1613634512] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:26:20,497 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:26:20,497 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-04 14:26:20,498 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [529869142] [2024-06-04 14:26:20,498 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:26:20,498 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-04 14:26:20,498 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:26:20,499 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-04 14:26:20,501 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-04 14:26:20,566 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 52 [2024-06-04 14:26:20,568 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 85 places, 100 transitions, 743 flow. Second operand has 7 states, 7 states have (on average 18.857142857142858) internal successors, (132), 7 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:26:20,568 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:26:20,568 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 52 [2024-06-04 14:26:20,568 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:26:21,278 INFO L124 PetriNetUnfolderBase]: 5500/8032 cut-off events. [2024-06-04 14:26:21,279 INFO L125 PetriNetUnfolderBase]: For 36452/36703 co-relation queries the response was YES. [2024-06-04 14:26:21,319 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31394 conditions, 8032 events. 5500/8032 cut-off events. For 36452/36703 co-relation queries the response was YES. Maximal size of possible extension queue 354. Compared 45396 event pairs, 2358 based on Foata normal form. 65/8072 useless extension candidates. Maximal degree in co-relation 31360. Up to 7410 conditions per place. [2024-06-04 14:26:21,358 INFO L140 encePairwiseOnDemand]: 41/52 looper letters, 95 selfloop transitions, 25 changer transitions 0/129 dead transitions. [2024-06-04 14:26:21,359 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 89 places, 129 transitions, 1060 flow [2024-06-04 14:26:21,359 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-04 14:26:21,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-04 14:26:21,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 164 transitions. [2024-06-04 14:26:21,360 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6307692307692307 [2024-06-04 14:26:21,360 INFO L175 Difference]: Start difference. First operand has 85 places, 100 transitions, 743 flow. Second operand 5 states and 164 transitions. [2024-06-04 14:26:21,360 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 89 places, 129 transitions, 1060 flow [2024-06-04 14:26:21,402 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 85 places, 129 transitions, 968 flow, removed 21 selfloop flow, removed 4 redundant places. [2024-06-04 14:26:21,404 INFO L231 Difference]: Finished difference. Result has 86 places, 100 transitions, 712 flow [2024-06-04 14:26:21,404 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=651, PETRI_DIFFERENCE_MINUEND_PLACES=81, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=100, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=75, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=712, PETRI_PLACES=86, PETRI_TRANSITIONS=100} [2024-06-04 14:26:21,405 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 31 predicate places. [2024-06-04 14:26:21,405 INFO L495 AbstractCegarLoop]: Abstraction has has 86 places, 100 transitions, 712 flow [2024-06-04 14:26:21,405 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.857142857142858) internal successors, (132), 7 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:26:21,405 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:26:21,405 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:26:21,405 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-06-04 14:26:21,406 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)] === [2024-06-04 14:26:21,406 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:26:21,406 INFO L85 PathProgramCache]: Analyzing trace with hash 1709679874, now seen corresponding path program 1 times [2024-06-04 14:26:21,406 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:26:21,406 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [252366870] [2024-06-04 14:26:21,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:26:21,407 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:26:21,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:26:21,592 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:26:21,592 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:26:21,592 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [252366870] [2024-06-04 14:26:21,592 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [252366870] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:26:21,592 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:26:21,593 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-04 14:26:21,593 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1890944552] [2024-06-04 14:26:21,593 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:26:21,593 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-04 14:26:21,593 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:26:21,594 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-04 14:26:21,594 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-04 14:26:21,626 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 52 [2024-06-04 14:26:21,626 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 100 transitions, 712 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) [2024-06-04 14:26:21,626 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:26:21,626 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 52 [2024-06-04 14:26:21,627 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:26:22,113 INFO L124 PetriNetUnfolderBase]: 4998/7360 cut-off events. [2024-06-04 14:26:22,114 INFO L125 PetriNetUnfolderBase]: For 40838/40861 co-relation queries the response was YES. [2024-06-04 14:26:22,136 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29609 conditions, 7360 events. 4998/7360 cut-off events. For 40838/40861 co-relation queries the response was YES. Maximal size of possible extension queue 339. Compared 42865 event pairs, 2477 based on Foata normal form. 27/7358 useless extension candidates. Maximal degree in co-relation 29574. Up to 6752 conditions per place. [2024-06-04 14:26:22,164 INFO L140 encePairwiseOnDemand]: 44/52 looper letters, 100 selfloop transitions, 14 changer transitions 0/128 dead transitions. [2024-06-04 14:26:22,164 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 89 places, 128 transitions, 1088 flow [2024-06-04 14:26:22,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-04 14:26:22,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-04 14:26:22,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 128 transitions. [2024-06-04 14:26:22,167 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6153846153846154 [2024-06-04 14:26:22,167 INFO L175 Difference]: Start difference. First operand has 86 places, 100 transitions, 712 flow. Second operand 4 states and 128 transitions. [2024-06-04 14:26:22,167 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 89 places, 128 transitions, 1088 flow [2024-06-04 14:26:22,204 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 85 places, 128 transitions, 1032 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-06-04 14:26:22,207 INFO L231 Difference]: Finished difference. Result has 87 places, 113 transitions, 835 flow [2024-06-04 14:26:22,208 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=662, PETRI_DIFFERENCE_MINUEND_PLACES=82, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=100, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=87, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=835, PETRI_PLACES=87, PETRI_TRANSITIONS=113} [2024-06-04 14:26:22,208 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 32 predicate places. [2024-06-04 14:26:22,208 INFO L495 AbstractCegarLoop]: Abstraction has has 87 places, 113 transitions, 835 flow [2024-06-04 14:26:22,208 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) [2024-06-04 14:26:22,208 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:26:22,209 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:26:22,209 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-06-04 14:26:22,209 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)] === [2024-06-04 14:26:22,209 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:26:22,209 INFO L85 PathProgramCache]: Analyzing trace with hash 441882047, now seen corresponding path program 1 times [2024-06-04 14:26:22,209 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:26:22,210 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1403651210] [2024-06-04 14:26:22,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:26:22,210 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:26:22,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:26:22,412 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:26:22,412 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:26:22,413 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1403651210] [2024-06-04 14:26:22,413 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1403651210] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:26:22,413 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:26:22,413 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-04 14:26:22,413 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1685204000] [2024-06-04 14:26:22,413 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:26:22,414 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-04 14:26:22,414 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:26:22,414 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-04 14:26:22,414 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-04 14:26:22,522 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 52 [2024-06-04 14:26:22,522 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 87 places, 113 transitions, 835 flow. Second operand has 7 states, 7 states have (on average 19.857142857142858) internal successors, (139), 7 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:26:22,522 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:26:22,522 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 52 [2024-06-04 14:26:22,522 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:26:23,205 INFO L124 PetriNetUnfolderBase]: 6100/8926 cut-off events. [2024-06-04 14:26:23,205 INFO L125 PetriNetUnfolderBase]: For 65148/65365 co-relation queries the response was YES. [2024-06-04 14:26:23,231 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39636 conditions, 8926 events. 6100/8926 cut-off events. For 65148/65365 co-relation queries the response was YES. Maximal size of possible extension queue 424. Compared 52025 event pairs, 1808 based on Foata normal form. 62/8736 useless extension candidates. Maximal degree in co-relation 39599. Up to 7913 conditions per place. [2024-06-04 14:26:23,264 INFO L140 encePairwiseOnDemand]: 42/52 looper letters, 90 selfloop transitions, 49 changer transitions 0/159 dead transitions. [2024-06-04 14:26:23,264 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 92 places, 159 transitions, 1345 flow [2024-06-04 14:26:23,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-04 14:26:23,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-04 14:26:23,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 199 transitions. [2024-06-04 14:26:23,266 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6378205128205128 [2024-06-04 14:26:23,266 INFO L175 Difference]: Start difference. First operand has 87 places, 113 transitions, 835 flow. Second operand 6 states and 199 transitions. [2024-06-04 14:26:23,266 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 92 places, 159 transitions, 1345 flow [2024-06-04 14:26:23,329 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 92 places, 159 transitions, 1335 flow, removed 5 selfloop flow, removed 0 redundant places. [2024-06-04 14:26:23,331 INFO L231 Difference]: Finished difference. Result has 93 places, 119 transitions, 1007 flow [2024-06-04 14:26:23,331 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=825, PETRI_DIFFERENCE_MINUEND_PLACES=87, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=113, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1007, PETRI_PLACES=93, PETRI_TRANSITIONS=119} [2024-06-04 14:26:23,332 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 38 predicate places. [2024-06-04 14:26:23,332 INFO L495 AbstractCegarLoop]: Abstraction has has 93 places, 119 transitions, 1007 flow [2024-06-04 14:26:23,332 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.857142857142858) internal successors, (139), 7 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:26:23,332 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:26:23,332 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:26:23,332 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-06-04 14:26:23,333 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)] === [2024-06-04 14:26:23,333 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:26:23,333 INFO L85 PathProgramCache]: Analyzing trace with hash -1059941569, now seen corresponding path program 2 times [2024-06-04 14:26:23,333 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:26:23,333 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1814105563] [2024-06-04 14:26:23,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:26:23,334 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:26:23,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:26:23,523 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:26:23,524 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:26:23,524 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1814105563] [2024-06-04 14:26:23,524 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1814105563] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:26:23,524 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:26:23,524 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-04 14:26:23,524 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1468572271] [2024-06-04 14:26:23,524 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:26:23,525 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-04 14:26:23,525 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:26:23,526 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-04 14:26:23,526 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-04 14:26:23,588 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 52 [2024-06-04 14:26:23,588 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 93 places, 119 transitions, 1007 flow. Second operand has 7 states, 7 states have (on average 19.857142857142858) internal successors, (139), 7 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:26:23,588 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:26:23,588 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 52 [2024-06-04 14:26:23,588 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:26:24,401 INFO L124 PetriNetUnfolderBase]: 6152/8994 cut-off events. [2024-06-04 14:26:24,401 INFO L125 PetriNetUnfolderBase]: For 82571/82865 co-relation queries the response was YES. [2024-06-04 14:26:24,422 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42498 conditions, 8994 events. 6152/8994 cut-off events. For 82571/82865 co-relation queries the response was YES. Maximal size of possible extension queue 425. Compared 52385 event pairs, 2212 based on Foata normal form. 75/8805 useless extension candidates. Maximal degree in co-relation 42458. Up to 8117 conditions per place. [2024-06-04 14:26:24,453 INFO L140 encePairwiseOnDemand]: 42/52 looper letters, 93 selfloop transitions, 45 changer transitions 0/158 dead transitions. [2024-06-04 14:26:24,453 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 98 places, 158 transitions, 1415 flow [2024-06-04 14:26:24,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-04 14:26:24,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-04 14:26:24,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 195 transitions. [2024-06-04 14:26:24,458 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.625 [2024-06-04 14:26:24,458 INFO L175 Difference]: Start difference. First operand has 93 places, 119 transitions, 1007 flow. Second operand 6 states and 195 transitions. [2024-06-04 14:26:24,458 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 98 places, 158 transitions, 1415 flow [2024-06-04 14:26:24,531 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 96 places, 158 transitions, 1331 flow, removed 18 selfloop flow, removed 2 redundant places. [2024-06-04 14:26:24,533 INFO L231 Difference]: Finished difference. Result has 97 places, 122 transitions, 1070 flow [2024-06-04 14:26:24,533 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=929, PETRI_DIFFERENCE_MINUEND_PLACES=91, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=119, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=74, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1070, PETRI_PLACES=97, PETRI_TRANSITIONS=122} [2024-06-04 14:26:24,534 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 42 predicate places. [2024-06-04 14:26:24,534 INFO L495 AbstractCegarLoop]: Abstraction has has 97 places, 122 transitions, 1070 flow [2024-06-04 14:26:24,534 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.857142857142858) internal successors, (139), 7 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:26:24,534 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:26:24,534 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:26:24,534 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-06-04 14:26:24,535 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)] === [2024-06-04 14:26:24,535 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:26:24,535 INFO L85 PathProgramCache]: Analyzing trace with hash 1132082559, now seen corresponding path program 3 times [2024-06-04 14:26:24,535 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:26:24,535 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1867475407] [2024-06-04 14:26:24,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:26:24,536 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:26:24,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:26:24,751 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:26:24,752 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:26:24,752 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1867475407] [2024-06-04 14:26:24,752 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1867475407] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:26:24,752 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:26:24,752 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-04 14:26:24,752 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1942004339] [2024-06-04 14:26:24,753 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:26:24,753 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-04 14:26:24,753 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:26:24,753 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-04 14:26:24,753 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-04 14:26:24,820 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 52 [2024-06-04 14:26:24,821 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 97 places, 122 transitions, 1070 flow. Second operand has 7 states, 7 states have (on average 19.857142857142858) internal successors, (139), 7 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:26:24,821 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:26:24,821 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 52 [2024-06-04 14:26:24,821 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:26:25,599 INFO L124 PetriNetUnfolderBase]: 6120/8959 cut-off events. [2024-06-04 14:26:25,599 INFO L125 PetriNetUnfolderBase]: For 90292/90580 co-relation queries the response was YES. [2024-06-04 14:26:25,633 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42932 conditions, 8959 events. 6120/8959 cut-off events. For 90292/90580 co-relation queries the response was YES. Maximal size of possible extension queue 424. Compared 52219 event pairs, 1798 based on Foata normal form. 106/8808 useless extension candidates. Maximal degree in co-relation 42890. Up to 8047 conditions per place. [2024-06-04 14:26:25,674 INFO L140 encePairwiseOnDemand]: 42/52 looper letters, 90 selfloop transitions, 41 changer transitions 0/151 dead transitions. [2024-06-04 14:26:25,675 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 101 places, 151 transitions, 1406 flow [2024-06-04 14:26:25,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-04 14:26:25,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-04 14:26:25,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 167 transitions. [2024-06-04 14:26:25,677 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6423076923076924 [2024-06-04 14:26:25,677 INFO L175 Difference]: Start difference. First operand has 97 places, 122 transitions, 1070 flow. Second operand 5 states and 167 transitions. [2024-06-04 14:26:25,677 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 101 places, 151 transitions, 1406 flow [2024-06-04 14:26:25,764 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 97 places, 151 transitions, 1289 flow, removed 16 selfloop flow, removed 4 redundant places. [2024-06-04 14:26:25,766 INFO L231 Difference]: Finished difference. Result has 98 places, 122 transitions, 1051 flow [2024-06-04 14:26:25,767 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=953, PETRI_DIFFERENCE_MINUEND_PLACES=93, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=122, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=81, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1051, PETRI_PLACES=98, PETRI_TRANSITIONS=122} [2024-06-04 14:26:25,767 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 43 predicate places. [2024-06-04 14:26:25,767 INFO L495 AbstractCegarLoop]: Abstraction has has 98 places, 122 transitions, 1051 flow [2024-06-04 14:26:25,768 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.857142857142858) internal successors, (139), 7 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:26:25,768 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:26:25,768 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:26:25,768 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-06-04 14:26:25,768 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)] === [2024-06-04 14:26:25,768 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:26:25,768 INFO L85 PathProgramCache]: Analyzing trace with hash 1412985479, now seen corresponding path program 1 times [2024-06-04 14:26:25,769 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:26:25,769 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1943563692] [2024-06-04 14:26:25,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:26:25,769 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:26:25,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:26:25,985 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:26:25,985 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:26:25,985 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1943563692] [2024-06-04 14:26:25,985 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1943563692] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:26:25,985 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:26:25,986 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 14:26:25,986 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1773632921] [2024-06-04 14:26:25,986 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:26:25,986 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 14:26:25,986 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:26:25,987 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 14:26:25,987 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-04 14:26:26,087 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 52 [2024-06-04 14:26:26,088 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 98 places, 122 transitions, 1051 flow. Second operand has 8 states, 8 states have (on average 18.75) internal successors, (150), 8 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:26:26,088 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:26:26,088 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 52 [2024-06-04 14:26:26,088 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:26:26,883 INFO L124 PetriNetUnfolderBase]: 6715/9793 cut-off events. [2024-06-04 14:26:26,883 INFO L125 PetriNetUnfolderBase]: For 94509/94826 co-relation queries the response was YES. [2024-06-04 14:26:26,916 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45993 conditions, 9793 events. 6715/9793 cut-off events. For 94509/94826 co-relation queries the response was YES. Maximal size of possible extension queue 423. Compared 56812 event pairs, 1908 based on Foata normal form. 117/9859 useless extension candidates. Maximal degree in co-relation 45950. Up to 8482 conditions per place. [2024-06-04 14:26:26,954 INFO L140 encePairwiseOnDemand]: 41/52 looper letters, 135 selfloop transitions, 43 changer transitions 0/189 dead transitions. [2024-06-04 14:26:26,954 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 104 places, 189 transitions, 1765 flow [2024-06-04 14:26:26,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 14:26:26,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 14:26:26,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 228 transitions. [2024-06-04 14:26:26,955 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6263736263736264 [2024-06-04 14:26:26,955 INFO L175 Difference]: Start difference. First operand has 98 places, 122 transitions, 1051 flow. Second operand 7 states and 228 transitions. [2024-06-04 14:26:26,956 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 104 places, 189 transitions, 1765 flow [2024-06-04 14:26:27,060 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 100 places, 189 transitions, 1658 flow, removed 5 selfloop flow, removed 4 redundant places. [2024-06-04 14:26:27,062 INFO L231 Difference]: Finished difference. Result has 103 places, 133 transitions, 1191 flow [2024-06-04 14:26:27,062 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=958, PETRI_DIFFERENCE_MINUEND_PLACES=94, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=122, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=82, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1191, PETRI_PLACES=103, PETRI_TRANSITIONS=133} [2024-06-04 14:26:27,062 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 48 predicate places. [2024-06-04 14:26:27,062 INFO L495 AbstractCegarLoop]: Abstraction has has 103 places, 133 transitions, 1191 flow [2024-06-04 14:26:27,063 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.75) internal successors, (150), 8 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:26:27,063 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:26:27,063 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:26:27,063 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-06-04 14:26:27,063 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)] === [2024-06-04 14:26:27,063 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:26:27,064 INFO L85 PathProgramCache]: Analyzing trace with hash 1501551239, now seen corresponding path program 2 times [2024-06-04 14:26:27,064 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:26:27,064 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [445696310] [2024-06-04 14:26:27,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:26:27,064 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:26:27,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:26:27,283 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:26:27,284 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:26:27,285 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [445696310] [2024-06-04 14:26:27,286 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [445696310] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:26:27,286 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:26:27,286 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 14:26:27,287 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1986679711] [2024-06-04 14:26:27,287 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:26:27,287 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 14:26:27,287 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:26:27,288 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 14:26:27,288 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-04 14:26:27,353 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 52 [2024-06-04 14:26:27,353 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 103 places, 133 transitions, 1191 flow. Second operand has 8 states, 8 states have (on average 18.75) internal successors, (150), 8 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:26:27,353 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:26:27,353 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 52 [2024-06-04 14:26:27,353 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:26:28,179 INFO L124 PetriNetUnfolderBase]: 6989/10199 cut-off events. [2024-06-04 14:26:28,179 INFO L125 PetriNetUnfolderBase]: For 112685/113054 co-relation queries the response was YES. [2024-06-04 14:26:28,215 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49946 conditions, 10199 events. 6989/10199 cut-off events. For 112685/113054 co-relation queries the response was YES. Maximal size of possible extension queue 432. Compared 59624 event pairs, 2358 based on Foata normal form. 127/10275 useless extension candidates. Maximal degree in co-relation 49900. Up to 9096 conditions per place. [2024-06-04 14:26:28,254 INFO L140 encePairwiseOnDemand]: 41/52 looper letters, 141 selfloop transitions, 39 changer transitions 0/191 dead transitions. [2024-06-04 14:26:28,254 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 109 places, 191 transitions, 1851 flow [2024-06-04 14:26:28,255 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 14:26:28,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 14:26:28,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 228 transitions. [2024-06-04 14:26:28,255 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6263736263736264 [2024-06-04 14:26:28,256 INFO L175 Difference]: Start difference. First operand has 103 places, 133 transitions, 1191 flow. Second operand 7 states and 228 transitions. [2024-06-04 14:26:28,256 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 109 places, 191 transitions, 1851 flow [2024-06-04 14:26:28,374 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 107 places, 191 transitions, 1792 flow, removed 11 selfloop flow, removed 2 redundant places. [2024-06-04 14:26:28,376 INFO L231 Difference]: Finished difference. Result has 109 places, 138 transitions, 1297 flow [2024-06-04 14:26:28,376 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=1132, PETRI_DIFFERENCE_MINUEND_PLACES=101, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=133, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=96, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1297, PETRI_PLACES=109, PETRI_TRANSITIONS=138} [2024-06-04 14:26:28,377 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 54 predicate places. [2024-06-04 14:26:28,377 INFO L495 AbstractCegarLoop]: Abstraction has has 109 places, 138 transitions, 1297 flow [2024-06-04 14:26:28,377 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.75) internal successors, (150), 8 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:26:28,377 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:26:28,377 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:26:28,377 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-06-04 14:26:28,378 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)] === [2024-06-04 14:26:28,378 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:26:28,378 INFO L85 PathProgramCache]: Analyzing trace with hash 1501699109, now seen corresponding path program 3 times [2024-06-04 14:26:28,378 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:26:28,378 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1753476179] [2024-06-04 14:26:28,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:26:28,378 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:26:28,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:26:28,630 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:26:28,631 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:26:28,631 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1753476179] [2024-06-04 14:26:28,631 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1753476179] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:26:28,631 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:26:28,631 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 14:26:28,632 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [993006581] [2024-06-04 14:26:28,632 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:26:28,632 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 14:26:28,632 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:26:28,633 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 14:26:28,633 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-04 14:26:28,686 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 52 [2024-06-04 14:26:28,687 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 109 places, 138 transitions, 1297 flow. Second operand has 8 states, 8 states have (on average 18.75) internal successors, (150), 8 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:26:28,687 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:26:28,687 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 52 [2024-06-04 14:26:28,687 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:26:29,527 INFO L124 PetriNetUnfolderBase]: 6935/10121 cut-off events. [2024-06-04 14:26:29,527 INFO L125 PetriNetUnfolderBase]: For 122389/122760 co-relation queries the response was YES. [2024-06-04 14:26:29,566 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50417 conditions, 10121 events. 6935/10121 cut-off events. For 122389/122760 co-relation queries the response was YES. Maximal size of possible extension queue 429. Compared 59036 event pairs, 2363 based on Foata normal form. 133/10203 useless extension candidates. Maximal degree in co-relation 50368. Up to 9216 conditions per place. [2024-06-04 14:26:29,605 INFO L140 encePairwiseOnDemand]: 41/52 looper letters, 139 selfloop transitions, 36 changer transitions 0/186 dead transitions. [2024-06-04 14:26:29,605 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 115 places, 186 transitions, 1790 flow [2024-06-04 14:26:29,605 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 14:26:29,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 14:26:29,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 222 transitions. [2024-06-04 14:26:29,606 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6098901098901099 [2024-06-04 14:26:29,606 INFO L175 Difference]: Start difference. First operand has 109 places, 138 transitions, 1297 flow. Second operand 7 states and 222 transitions. [2024-06-04 14:26:29,606 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 115 places, 186 transitions, 1790 flow [2024-06-04 14:26:29,780 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 112 places, 186 transitions, 1721 flow, removed 15 selfloop flow, removed 3 redundant places. [2024-06-04 14:26:29,782 INFO L231 Difference]: Finished difference. Result has 113 places, 139 transitions, 1324 flow [2024-06-04 14:26:29,782 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=1230, PETRI_DIFFERENCE_MINUEND_PLACES=106, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=138, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=102, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1324, PETRI_PLACES=113, PETRI_TRANSITIONS=139} [2024-06-04 14:26:29,783 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 58 predicate places. [2024-06-04 14:26:29,783 INFO L495 AbstractCegarLoop]: Abstraction has has 113 places, 139 transitions, 1324 flow [2024-06-04 14:26:29,783 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.75) internal successors, (150), 8 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:26:29,783 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:26:29,783 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:26:29,783 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-06-04 14:26:29,783 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)] === [2024-06-04 14:26:29,784 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:26:29,784 INFO L85 PathProgramCache]: Analyzing trace with hash 740332721, now seen corresponding path program 4 times [2024-06-04 14:26:29,784 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:26:29,784 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [532474109] [2024-06-04 14:26:29,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:26:29,784 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:26:29,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:26:30,023 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:26:30,023 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:26:30,023 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [532474109] [2024-06-04 14:26:30,023 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [532474109] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:26:30,023 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:26:30,023 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 14:26:30,024 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2026077108] [2024-06-04 14:26:30,024 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:26:30,024 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 14:26:30,024 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:26:30,025 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 14:26:30,025 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-04 14:26:30,095 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 52 [2024-06-04 14:26:30,096 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 113 places, 139 transitions, 1324 flow. Second operand has 8 states, 8 states have (on average 18.75) internal successors, (150), 8 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:26:30,096 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:26:30,096 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 52 [2024-06-04 14:26:30,096 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:26:31,084 INFO L124 PetriNetUnfolderBase]: 6968/10192 cut-off events. [2024-06-04 14:26:31,085 INFO L125 PetriNetUnfolderBase]: For 131050/131427 co-relation queries the response was YES. [2024-06-04 14:26:31,123 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51083 conditions, 10192 events. 6968/10192 cut-off events. For 131050/131427 co-relation queries the response was YES. Maximal size of possible extension queue 424. Compared 59535 event pairs, 2343 based on Foata normal form. 142/10293 useless extension candidates. Maximal degree in co-relation 51032. Up to 9310 conditions per place. [2024-06-04 14:26:31,162 INFO L140 encePairwiseOnDemand]: 41/52 looper letters, 154 selfloop transitions, 31 changer transitions 0/196 dead transitions. [2024-06-04 14:26:31,162 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 120 places, 196 transitions, 1879 flow [2024-06-04 14:26:31,162 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 14:26:31,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 14:26:31,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 249 transitions. [2024-06-04 14:26:31,163 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5985576923076923 [2024-06-04 14:26:31,164 INFO L175 Difference]: Start difference. First operand has 113 places, 139 transitions, 1324 flow. Second operand 8 states and 249 transitions. [2024-06-04 14:26:31,164 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 120 places, 196 transitions, 1879 flow [2024-06-04 14:26:31,311 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 115 places, 196 transitions, 1807 flow, removed 2 selfloop flow, removed 5 redundant places. [2024-06-04 14:26:31,313 INFO L231 Difference]: Finished difference. Result has 116 places, 141 transitions, 1362 flow [2024-06-04 14:26:31,313 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=1252, PETRI_DIFFERENCE_MINUEND_PLACES=108, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=139, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=108, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1362, PETRI_PLACES=116, PETRI_TRANSITIONS=141} [2024-06-04 14:26:31,314 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 61 predicate places. [2024-06-04 14:26:31,314 INFO L495 AbstractCegarLoop]: Abstraction has has 116 places, 141 transitions, 1362 flow [2024-06-04 14:26:31,314 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.75) internal successors, (150), 8 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:26:31,314 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:26:31,314 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:26:31,314 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-06-04 14:26:31,315 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)] === [2024-06-04 14:26:31,315 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:26:31,315 INFO L85 PathProgramCache]: Analyzing trace with hash 734970341, now seen corresponding path program 5 times [2024-06-04 14:26:31,315 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:26:31,315 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1261853834] [2024-06-04 14:26:31,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:26:31,316 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:26:31,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:26:31,550 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:26:31,550 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:26:31,550 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1261853834] [2024-06-04 14:26:31,551 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1261853834] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:26:31,551 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:26:31,551 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 14:26:31,551 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1380580442] [2024-06-04 14:26:31,551 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:26:31,551 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 14:26:31,552 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:26:31,552 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 14:26:31,552 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-04 14:26:31,637 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 52 [2024-06-04 14:26:31,637 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 116 places, 141 transitions, 1362 flow. Second operand has 8 states, 8 states have (on average 18.75) internal successors, (150), 8 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:26:31,637 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:26:31,637 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 52 [2024-06-04 14:26:31,637 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:26:32,528 INFO L124 PetriNetUnfolderBase]: 7114/10416 cut-off events. [2024-06-04 14:26:32,529 INFO L125 PetriNetUnfolderBase]: For 145143/145514 co-relation queries the response was YES. [2024-06-04 14:26:32,569 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53033 conditions, 10416 events. 7114/10416 cut-off events. For 145143/145514 co-relation queries the response was YES. Maximal size of possible extension queue 432. Compared 61023 event pairs, 2399 based on Foata normal form. 127/10494 useless extension candidates. Maximal degree in co-relation 52981. Up to 9523 conditions per place. [2024-06-04 14:26:32,608 INFO L140 encePairwiseOnDemand]: 41/52 looper letters, 143 selfloop transitions, 29 changer transitions 0/183 dead transitions. [2024-06-04 14:26:32,608 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 121 places, 183 transitions, 1857 flow [2024-06-04 14:26:32,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-04 14:26:32,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-04 14:26:32,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 194 transitions. [2024-06-04 14:26:32,609 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6217948717948718 [2024-06-04 14:26:32,609 INFO L175 Difference]: Start difference. First operand has 116 places, 141 transitions, 1362 flow. Second operand 6 states and 194 transitions. [2024-06-04 14:26:32,610 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 121 places, 183 transitions, 1857 flow [2024-06-04 14:26:32,782 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 115 places, 183 transitions, 1785 flow, removed 7 selfloop flow, removed 6 redundant places. [2024-06-04 14:26:32,784 INFO L231 Difference]: Finished difference. Result has 116 places, 143 transitions, 1400 flow [2024-06-04 14:26:32,784 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=1290, PETRI_DIFFERENCE_MINUEND_PLACES=110, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=141, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=112, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1400, PETRI_PLACES=116, PETRI_TRANSITIONS=143} [2024-06-04 14:26:32,784 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 61 predicate places. [2024-06-04 14:26:32,784 INFO L495 AbstractCegarLoop]: Abstraction has has 116 places, 143 transitions, 1400 flow [2024-06-04 14:26:32,785 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.75) internal successors, (150), 8 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:26:32,785 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:26:32,785 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:26:32,785 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-06-04 14:26:32,785 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)] === [2024-06-04 14:26:32,785 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:26:32,785 INFO L85 PathProgramCache]: Analyzing trace with hash 734822471, now seen corresponding path program 6 times [2024-06-04 14:26:32,786 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:26:32,786 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [105016954] [2024-06-04 14:26:32,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:26:32,786 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:26:32,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:26:32,990 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:26:32,990 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:26:32,991 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [105016954] [2024-06-04 14:26:32,991 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [105016954] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:26:32,991 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:26:32,991 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 14:26:32,991 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1887583017] [2024-06-04 14:26:32,991 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:26:32,991 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 14:26:32,992 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:26:32,992 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 14:26:32,992 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-04 14:26:33,059 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 52 [2024-06-04 14:26:33,060 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 116 places, 143 transitions, 1400 flow. Second operand has 8 states, 8 states have (on average 18.75) internal successors, (150), 8 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:26:33,060 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:26:33,060 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 52 [2024-06-04 14:26:33,060 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:26:34,024 INFO L124 PetriNetUnfolderBase]: 7075/10355 cut-off events. [2024-06-04 14:26:34,024 INFO L125 PetriNetUnfolderBase]: For 152682/153045 co-relation queries the response was YES. [2024-06-04 14:26:34,078 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52979 conditions, 10355 events. 7075/10355 cut-off events. For 152682/153045 co-relation queries the response was YES. Maximal size of possible extension queue 428. Compared 60676 event pairs, 1958 based on Foata normal form. 141/10447 useless extension candidates. Maximal degree in co-relation 52926. Up to 9116 conditions per place. [2024-06-04 14:26:34,120 INFO L140 encePairwiseOnDemand]: 41/52 looper letters, 140 selfloop transitions, 37 changer transitions 0/188 dead transitions. [2024-06-04 14:26:34,120 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 121 places, 188 transitions, 1897 flow [2024-06-04 14:26:34,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-04 14:26:34,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-04 14:26:34,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 197 transitions. [2024-06-04 14:26:34,121 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6314102564102564 [2024-06-04 14:26:34,121 INFO L175 Difference]: Start difference. First operand has 116 places, 143 transitions, 1400 flow. Second operand 6 states and 197 transitions. [2024-06-04 14:26:34,122 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 121 places, 188 transitions, 1897 flow [2024-06-04 14:26:34,324 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 117 places, 188 transitions, 1815 flow, removed 14 selfloop flow, removed 4 redundant places. [2024-06-04 14:26:34,327 INFO L231 Difference]: Finished difference. Result has 119 places, 145 transitions, 1438 flow [2024-06-04 14:26:34,327 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=1320, PETRI_DIFFERENCE_MINUEND_PLACES=112, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=143, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=107, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1438, PETRI_PLACES=119, PETRI_TRANSITIONS=145} [2024-06-04 14:26:34,327 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 64 predicate places. [2024-06-04 14:26:34,327 INFO L495 AbstractCegarLoop]: Abstraction has has 119 places, 145 transitions, 1438 flow [2024-06-04 14:26:34,327 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.75) internal successors, (150), 8 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:26:34,328 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:26:34,328 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:26:34,328 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-06-04 14:26:34,328 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)] === [2024-06-04 14:26:34,328 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:26:34,328 INFO L85 PathProgramCache]: Analyzing trace with hash 740547923, now seen corresponding path program 1 times [2024-06-04 14:26:34,328 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:26:34,329 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1982967157] [2024-06-04 14:26:34,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:26:34,329 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:26:34,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:26:34,533 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:26:34,533 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:26:34,533 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1982967157] [2024-06-04 14:26:34,533 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1982967157] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:26:34,534 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:26:34,534 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 14:26:34,534 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2139273614] [2024-06-04 14:26:34,534 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:26:34,534 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 14:26:34,534 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:26:34,535 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 14:26:34,535 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-04 14:26:34,606 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 52 [2024-06-04 14:26:34,606 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 119 places, 145 transitions, 1438 flow. Second operand has 8 states, 8 states have (on average 18.75) internal successors, (150), 8 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:26:34,606 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:26:34,606 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 52 [2024-06-04 14:26:34,607 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:26:35,589 INFO L124 PetriNetUnfolderBase]: 6967/10209 cut-off events. [2024-06-04 14:26:35,589 INFO L125 PetriNetUnfolderBase]: For 159572/159923 co-relation queries the response was YES. [2024-06-04 14:26:35,637 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52530 conditions, 10209 events. 6967/10209 cut-off events. For 159572/159923 co-relation queries the response was YES. Maximal size of possible extension queue 419. Compared 59633 event pairs, 2184 based on Foata normal form. 144/10312 useless extension candidates. Maximal degree in co-relation 52475. Up to 8973 conditions per place. [2024-06-04 14:26:35,679 INFO L140 encePairwiseOnDemand]: 41/52 looper letters, 156 selfloop transitions, 38 changer transitions 0/205 dead transitions. [2024-06-04 14:26:35,680 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 125 places, 205 transitions, 1979 flow [2024-06-04 14:26:35,680 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 14:26:35,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 14:26:35,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 251 transitions. [2024-06-04 14:26:35,681 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6033653846153846 [2024-06-04 14:26:35,681 INFO L175 Difference]: Start difference. First operand has 119 places, 145 transitions, 1438 flow. Second operand 8 states and 251 transitions. [2024-06-04 14:26:35,681 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 125 places, 205 transitions, 1979 flow [2024-06-04 14:26:35,947 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 120 places, 205 transitions, 1844 flow, removed 12 selfloop flow, removed 5 redundant places. [2024-06-04 14:26:35,949 INFO L231 Difference]: Finished difference. Result has 121 places, 146 transitions, 1378 flow [2024-06-04 14:26:35,950 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=1263, PETRI_DIFFERENCE_MINUEND_PLACES=113, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=144, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=106, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1378, PETRI_PLACES=121, PETRI_TRANSITIONS=146} [2024-06-04 14:26:35,950 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 66 predicate places. [2024-06-04 14:26:35,950 INFO L495 AbstractCegarLoop]: Abstraction has has 121 places, 146 transitions, 1378 flow [2024-06-04 14:26:35,950 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.75) internal successors, (150), 8 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:26:35,951 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:26:35,951 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:26:35,951 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-06-04 14:26:35,951 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)] === [2024-06-04 14:26:35,951 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:26:35,951 INFO L85 PathProgramCache]: Analyzing trace with hash -904215641, now seen corresponding path program 1 times [2024-06-04 14:26:35,951 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:26:35,951 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [329485805] [2024-06-04 14:26:35,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:26:35,952 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:26:35,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:26:36,120 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:26:36,120 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:26:36,120 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [329485805] [2024-06-04 14:26:36,120 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [329485805] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:26:36,120 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:26:36,120 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-04 14:26:36,121 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1669934587] [2024-06-04 14:26:36,121 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:26:36,121 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-04 14:26:36,121 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:26:36,121 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-04 14:26:36,122 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-04 14:26:36,166 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 52 [2024-06-04 14:26:36,167 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 121 places, 146 transitions, 1378 flow. Second operand has 6 states, 6 states have (on average 20.5) internal successors, (123), 6 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:26:36,167 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:26:36,167 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 52 [2024-06-04 14:26:36,167 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:26:36,910 INFO L124 PetriNetUnfolderBase]: 5676/8381 cut-off events. [2024-06-04 14:26:36,910 INFO L125 PetriNetUnfolderBase]: For 138754/139003 co-relation queries the response was YES. [2024-06-04 14:26:36,945 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44545 conditions, 8381 events. 5676/8381 cut-off events. For 138754/139003 co-relation queries the response was YES. Maximal size of possible extension queue 362. Compared 49240 event pairs, 2029 based on Foata normal form. 32/8386 useless extension candidates. Maximal degree in co-relation 44490. Up to 7824 conditions per place. [2024-06-04 14:26:36,977 INFO L140 encePairwiseOnDemand]: 43/52 looper letters, 132 selfloop transitions, 33 changer transitions 0/177 dead transitions. [2024-06-04 14:26:36,978 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 125 places, 177 transitions, 1950 flow [2024-06-04 14:26:36,978 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-04 14:26:36,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-04 14:26:36,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 160 transitions. [2024-06-04 14:26:36,980 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6153846153846154 [2024-06-04 14:26:36,980 INFO L175 Difference]: Start difference. First operand has 121 places, 146 transitions, 1378 flow. Second operand 5 states and 160 transitions. [2024-06-04 14:26:36,980 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 125 places, 177 transitions, 1950 flow [2024-06-04 14:26:37,131 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 119 places, 177 transitions, 1861 flow, removed 8 selfloop flow, removed 6 redundant places. [2024-06-04 14:26:37,133 INFO L231 Difference]: Finished difference. Result has 120 places, 154 transitions, 1472 flow [2024-06-04 14:26:37,133 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=1289, PETRI_DIFFERENCE_MINUEND_PLACES=115, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=146, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=117, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1472, PETRI_PLACES=120, PETRI_TRANSITIONS=154} [2024-06-04 14:26:37,134 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 65 predicate places. [2024-06-04 14:26:37,134 INFO L495 AbstractCegarLoop]: Abstraction has has 120 places, 154 transitions, 1472 flow [2024-06-04 14:26:37,134 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 20.5) internal successors, (123), 6 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:26:37,134 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:26:37,134 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:26:37,134 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-06-04 14:26:37,135 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)] === [2024-06-04 14:26:37,135 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:26:37,135 INFO L85 PathProgramCache]: Analyzing trace with hash -872699801, now seen corresponding path program 2 times [2024-06-04 14:26:37,135 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:26:37,135 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1654834994] [2024-06-04 14:26:37,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:26:37,136 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:26:37,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:26:37,318 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:26:37,319 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:26:37,319 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1654834994] [2024-06-04 14:26:37,319 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1654834994] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:26:37,319 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:26:37,319 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-04 14:26:37,319 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2105909378] [2024-06-04 14:26:37,319 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:26:37,320 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-04 14:26:37,320 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:26:37,320 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-04 14:26:37,320 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-04 14:26:37,378 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 52 [2024-06-04 14:26:37,378 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 120 places, 154 transitions, 1472 flow. Second operand has 6 states, 6 states have (on average 20.5) internal successors, (123), 6 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:26:37,378 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:26:37,378 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 52 [2024-06-04 14:26:37,378 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:26:38,108 INFO L124 PetriNetUnfolderBase]: 5669/8372 cut-off events. [2024-06-04 14:26:38,108 INFO L125 PetriNetUnfolderBase]: For 154341/154602 co-relation queries the response was YES. [2024-06-04 14:26:38,142 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46125 conditions, 8372 events. 5669/8372 cut-off events. For 154341/154602 co-relation queries the response was YES. Maximal size of possible extension queue 362. Compared 49085 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. [2024-06-04 14:26:38,175 INFO L140 encePairwiseOnDemand]: 43/52 looper letters, 130 selfloop transitions, 29 changer transitions 0/171 dead transitions. [2024-06-04 14:26:38,175 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 123 places, 171 transitions, 1834 flow [2024-06-04 14:26:38,176 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-04 14:26:38,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-04 14:26:38,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 132 transitions. [2024-06-04 14:26:38,176 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6346153846153846 [2024-06-04 14:26:38,176 INFO L175 Difference]: Start difference. First operand has 120 places, 154 transitions, 1472 flow. Second operand 4 states and 132 transitions. [2024-06-04 14:26:38,176 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 123 places, 171 transitions, 1834 flow [2024-06-04 14:26:38,325 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 122 places, 171 transitions, 1741 flow, removed 36 selfloop flow, removed 1 redundant places. [2024-06-04 14:26:38,327 INFO L231 Difference]: Finished difference. Result has 123 places, 154 transitions, 1453 flow [2024-06-04 14:26:38,327 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=1379, PETRI_DIFFERENCE_MINUEND_PLACES=119, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=154, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=125, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=1453, PETRI_PLACES=123, PETRI_TRANSITIONS=154} [2024-06-04 14:26:38,327 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 68 predicate places. [2024-06-04 14:26:38,328 INFO L495 AbstractCegarLoop]: Abstraction has has 123 places, 154 transitions, 1453 flow [2024-06-04 14:26:38,328 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 20.5) internal successors, (123), 6 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:26:38,328 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:26:38,328 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:26:38,328 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-06-04 14:26:38,328 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)] === [2024-06-04 14:26:38,328 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:26:38,329 INFO L85 PathProgramCache]: Analyzing trace with hash -1863391521, now seen corresponding path program 1 times [2024-06-04 14:26:38,329 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:26:38,329 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1556744052] [2024-06-04 14:26:38,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:26:38,329 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:26:38,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:26:38,555 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:26:38,555 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:26:38,555 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1556744052] [2024-06-04 14:26:38,556 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1556744052] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:26:38,556 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:26:38,556 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-04 14:26:38,556 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [571613488] [2024-06-04 14:26:38,556 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:26:38,556 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-04 14:26:38,557 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:26:38,557 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-04 14:26:38,557 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-04 14:26:38,603 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 52 [2024-06-04 14:26:38,604 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 123 places, 154 transitions, 1453 flow. Second operand has 6 states, 6 states have (on average 20.5) internal successors, (123), 6 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:26:38,604 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:26:38,604 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 52 [2024-06-04 14:26:38,604 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:26:39,404 INFO L124 PetriNetUnfolderBase]: 5840/8644 cut-off events. [2024-06-04 14:26:39,405 INFO L125 PetriNetUnfolderBase]: For 160629/160684 co-relation queries the response was YES. [2024-06-04 14:26:39,442 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45630 conditions, 8644 events. 5840/8644 cut-off events. For 160629/160684 co-relation queries the response was YES. Maximal size of possible extension queue 392. Compared 51334 event pairs, 2282 based on Foata normal form. 63/8680 useless extension candidates. Maximal degree in co-relation 45572. Up to 7977 conditions per place. [2024-06-04 14:26:39,478 INFO L140 encePairwiseOnDemand]: 44/52 looper letters, 145 selfloop transitions, 17 changer transitions 0/177 dead transitions. [2024-06-04 14:26:39,479 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 127 places, 177 transitions, 1857 flow [2024-06-04 14:26:39,479 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-04 14:26:39,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-04 14:26:39,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 153 transitions. [2024-06-04 14:26:39,480 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5884615384615385 [2024-06-04 14:26:39,480 INFO L175 Difference]: Start difference. First operand has 123 places, 154 transitions, 1453 flow. Second operand 5 states and 153 transitions. [2024-06-04 14:26:39,480 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 127 places, 177 transitions, 1857 flow [2024-06-04 14:26:39,611 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 124 places, 177 transitions, 1799 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-06-04 14:26:39,613 INFO L231 Difference]: Finished difference. Result has 125 places, 157 transitions, 1469 flow [2024-06-04 14:26:39,613 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=1395, PETRI_DIFFERENCE_MINUEND_PLACES=120, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=154, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=137, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1469, PETRI_PLACES=125, PETRI_TRANSITIONS=157} [2024-06-04 14:26:39,613 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 70 predicate places. [2024-06-04 14:26:39,613 INFO L495 AbstractCegarLoop]: Abstraction has has 125 places, 157 transitions, 1469 flow [2024-06-04 14:26:39,614 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 20.5) internal successors, (123), 6 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:26:39,614 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:26:39,614 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:26:39,614 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-06-04 14:26:39,614 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)] === [2024-06-04 14:26:39,614 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:26:39,614 INFO L85 PathProgramCache]: Analyzing trace with hash 938080417, now seen corresponding path program 1 times [2024-06-04 14:26:39,615 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:26:39,615 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [184366165] [2024-06-04 14:26:39,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:26:39,615 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:26:39,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:26:39,800 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:26:39,800 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:26:39,800 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [184366165] [2024-06-04 14:26:39,801 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [184366165] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:26:39,801 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:26:39,801 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-04 14:26:39,801 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1126128454] [2024-06-04 14:26:39,801 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:26:39,801 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-04 14:26:39,801 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:26:39,802 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-04 14:26:39,802 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-04 14:26:39,843 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 52 [2024-06-04 14:26:39,844 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 125 places, 157 transitions, 1469 flow. Second operand has 7 states, 7 states have (on average 18.285714285714285) internal successors, (128), 7 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:26:39,844 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:26:39,844 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 52 [2024-06-04 14:26:39,844 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:26:40,778 INFO L124 PetriNetUnfolderBase]: 7463/10909 cut-off events. [2024-06-04 14:26:40,779 INFO L125 PetriNetUnfolderBase]: For 207782/207797 co-relation queries the response was YES. [2024-06-04 14:26:40,825 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57863 conditions, 10909 events. 7463/10909 cut-off events. For 207782/207797 co-relation queries the response was YES. Maximal size of possible extension queue 441. Compared 63540 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. [2024-06-04 14:26:40,867 INFO L140 encePairwiseOnDemand]: 42/52 looper letters, 179 selfloop transitions, 26 changer transitions 0/213 dead transitions. [2024-06-04 14:26:40,868 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 130 places, 213 transitions, 2261 flow [2024-06-04 14:26:40,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-04 14:26:40,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-04 14:26:40,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 181 transitions. [2024-06-04 14:26:40,869 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5801282051282052 [2024-06-04 14:26:40,869 INFO L175 Difference]: Start difference. First operand has 125 places, 157 transitions, 1469 flow. Second operand 6 states and 181 transitions. [2024-06-04 14:26:40,869 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 130 places, 213 transitions, 2261 flow [2024-06-04 14:26:41,155 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 127 places, 213 transitions, 2204 flow, removed 10 selfloop flow, removed 3 redundant places. [2024-06-04 14:26:41,157 INFO L231 Difference]: Finished difference. Result has 131 places, 180 transitions, 1722 flow [2024-06-04 14:26:41,158 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=1419, PETRI_DIFFERENCE_MINUEND_PLACES=122, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=157, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=139, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1722, PETRI_PLACES=131, PETRI_TRANSITIONS=180} [2024-06-04 14:26:41,158 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 76 predicate places. [2024-06-04 14:26:41,158 INFO L495 AbstractCegarLoop]: Abstraction has has 131 places, 180 transitions, 1722 flow [2024-06-04 14:26:41,158 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.285714285714285) internal successors, (128), 7 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:26:41,158 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:26:41,159 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:26:41,159 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-06-04 14:26:41,159 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)] === [2024-06-04 14:26:41,159 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:26:41,159 INFO L85 PathProgramCache]: Analyzing trace with hash 1818957531, now seen corresponding path program 2 times [2024-06-04 14:26:41,159 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:26:41,160 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [921404692] [2024-06-04 14:26:41,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:26:41,160 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:26:41,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:26:41,340 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:26:41,340 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:26:41,340 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [921404692] [2024-06-04 14:26:41,340 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [921404692] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:26:41,340 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:26:41,340 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-04 14:26:41,341 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [350632638] [2024-06-04 14:26:41,341 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:26:41,341 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-04 14:26:41,341 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:26:41,341 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-04 14:26:41,342 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-04 14:26:41,374 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 52 [2024-06-04 14:26:41,375 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 131 places, 180 transitions, 1722 flow. Second operand has 7 states, 7 states have (on average 18.285714285714285) internal successors, (128), 7 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:26:41,375 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:26:41,375 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 52 [2024-06-04 14:26:41,375 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:26:42,365 INFO L124 PetriNetUnfolderBase]: 7479/10933 cut-off events. [2024-06-04 14:26:42,365 INFO L125 PetriNetUnfolderBase]: For 226146/226150 co-relation queries the response was YES. [2024-06-04 14:26:42,412 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60286 conditions, 10933 events. 7479/10933 cut-off events. For 226146/226150 co-relation queries the response was YES. Maximal size of possible extension queue 441. Compared 63806 event pairs, 2654 based on Foata normal form. 6/10932 useless extension candidates. Maximal degree in co-relation 60223. Up to 10198 conditions per place. [2024-06-04 14:26:42,454 INFO L140 encePairwiseOnDemand]: 43/52 looper letters, 171 selfloop transitions, 30 changer transitions 0/209 dead transitions. [2024-06-04 14:26:42,455 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 135 places, 209 transitions, 2340 flow [2024-06-04 14:26:42,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-04 14:26:42,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-04 14:26:42,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 151 transitions. [2024-06-04 14:26:42,456 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5807692307692308 [2024-06-04 14:26:42,456 INFO L175 Difference]: Start difference. First operand has 131 places, 180 transitions, 1722 flow. Second operand 5 states and 151 transitions. [2024-06-04 14:26:42,456 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 135 places, 209 transitions, 2340 flow [2024-06-04 14:26:42,692 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 135 places, 209 transitions, 2308 flow, removed 16 selfloop flow, removed 0 redundant places. [2024-06-04 14:26:42,694 INFO L231 Difference]: Finished difference. Result has 137 places, 186 transitions, 1831 flow [2024-06-04 14:26:42,694 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=1694, PETRI_DIFFERENCE_MINUEND_PLACES=131, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=180, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=155, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1831, PETRI_PLACES=137, PETRI_TRANSITIONS=186} [2024-06-04 14:26:42,695 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 82 predicate places. [2024-06-04 14:26:42,695 INFO L495 AbstractCegarLoop]: Abstraction has has 137 places, 186 transitions, 1831 flow [2024-06-04 14:26:42,695 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.285714285714285) internal successors, (128), 7 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:26:42,695 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:26:42,695 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:26:42,695 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-06-04 14:26:42,695 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)] === [2024-06-04 14:26:42,696 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:26:42,696 INFO L85 PathProgramCache]: Analyzing trace with hash 1818946371, now seen corresponding path program 3 times [2024-06-04 14:26:42,696 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:26:42,696 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [493324619] [2024-06-04 14:26:42,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:26:42,696 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:26:42,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:26:42,902 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:26:42,902 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:26:42,902 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [493324619] [2024-06-04 14:26:42,902 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [493324619] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:26:42,902 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:26:42,902 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-04 14:26:42,903 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1028851036] [2024-06-04 14:26:42,903 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:26:42,903 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-04 14:26:42,903 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:26:42,903 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-04 14:26:42,903 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-04 14:26:42,942 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 52 [2024-06-04 14:26:42,943 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 137 places, 186 transitions, 1831 flow. Second operand has 7 states, 7 states have (on average 18.285714285714285) internal successors, (128), 7 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:26:42,943 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:26:42,943 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 52 [2024-06-04 14:26:42,943 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:26:43,999 INFO L124 PetriNetUnfolderBase]: 7472/10926 cut-off events. [2024-06-04 14:26:43,999 INFO L125 PetriNetUnfolderBase]: For 241088/241114 co-relation queries the response was YES. [2024-06-04 14:26:44,060 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61040 conditions, 10926 events. 7472/10926 cut-off events. For 241088/241114 co-relation queries the response was YES. Maximal size of possible extension queue 441. Compared 63774 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. [2024-06-04 14:26:44,107 INFO L140 encePairwiseOnDemand]: 43/52 looper letters, 173 selfloop transitions, 31 changer transitions 0/212 dead transitions. [2024-06-04 14:26:44,107 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 141 places, 212 transitions, 2309 flow [2024-06-04 14:26:44,108 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-04 14:26:44,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-04 14:26:44,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 155 transitions. [2024-06-04 14:26:44,108 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5961538461538461 [2024-06-04 14:26:44,108 INFO L175 Difference]: Start difference. First operand has 137 places, 186 transitions, 1831 flow. Second operand 5 states and 155 transitions. [2024-06-04 14:26:44,108 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 141 places, 212 transitions, 2309 flow [2024-06-04 14:26:44,438 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 140 places, 212 transitions, 2249 flow, removed 17 selfloop flow, removed 1 redundant places. [2024-06-04 14:26:44,441 INFO L231 Difference]: Finished difference. Result has 141 places, 186 transitions, 1847 flow [2024-06-04 14:26:44,441 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=1771, PETRI_DIFFERENCE_MINUEND_PLACES=136, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=186, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=155, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1847, PETRI_PLACES=141, PETRI_TRANSITIONS=186} [2024-06-04 14:26:44,442 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 86 predicate places. [2024-06-04 14:26:44,442 INFO L495 AbstractCegarLoop]: Abstraction has has 141 places, 186 transitions, 1847 flow [2024-06-04 14:26:44,442 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.285714285714285) internal successors, (128), 7 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:26:44,442 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:26:44,442 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:26:44,442 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2024-06-04 14:26:44,442 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)] === [2024-06-04 14:26:44,443 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:26:44,443 INFO L85 PathProgramCache]: Analyzing trace with hash 2145451239, now seen corresponding path program 1 times [2024-06-04 14:26:44,443 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:26:44,443 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1658017811] [2024-06-04 14:26:44,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:26:44,443 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:26:44,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:26:44,618 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:26:44,619 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:26:44,619 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1658017811] [2024-06-04 14:26:44,619 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1658017811] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:26:44,619 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:26:44,619 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-04 14:26:44,619 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1864367585] [2024-06-04 14:26:44,619 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:26:44,620 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-04 14:26:44,620 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:26:44,620 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-04 14:26:44,620 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-04 14:26:44,674 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 52 [2024-06-04 14:26:44,675 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 141 places, 186 transitions, 1847 flow. Second operand has 7 states, 7 states have (on average 19.285714285714285) internal successors, (135), 7 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:26:44,675 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:26:44,675 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 52 [2024-06-04 14:26:44,675 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:26:45,586 INFO L124 PetriNetUnfolderBase]: 6148/8991 cut-off events. [2024-06-04 14:26:45,587 INFO L125 PetriNetUnfolderBase]: For 216241/216248 co-relation queries the response was YES. [2024-06-04 14:26:45,639 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51954 conditions, 8991 events. 6148/8991 cut-off events. For 216241/216248 co-relation queries the response was YES. Maximal size of possible extension queue 389. Compared 52057 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. [2024-06-04 14:26:45,681 INFO L140 encePairwiseOnDemand]: 42/52 looper letters, 190 selfloop transitions, 33 changer transitions 0/232 dead transitions. [2024-06-04 14:26:45,681 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 146 places, 232 transitions, 2622 flow [2024-06-04 14:26:45,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-04 14:26:45,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-04 14:26:45,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 183 transitions. [2024-06-04 14:26:45,682 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5865384615384616 [2024-06-04 14:26:45,682 INFO L175 Difference]: Start difference. First operand has 141 places, 186 transitions, 1847 flow. Second operand 6 states and 183 transitions. [2024-06-04 14:26:45,682 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 146 places, 232 transitions, 2622 flow [2024-06-04 14:26:45,928 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 143 places, 232 transitions, 2574 flow, removed 4 selfloop flow, removed 3 redundant places. [2024-06-04 14:26:45,931 INFO L231 Difference]: Finished difference. Result has 146 places, 203 transitions, 2061 flow [2024-06-04 14:26:45,931 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=1803, PETRI_DIFFERENCE_MINUEND_PLACES=138, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=186, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=158, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2061, PETRI_PLACES=146, PETRI_TRANSITIONS=203} [2024-06-04 14:26:45,932 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 91 predicate places. [2024-06-04 14:26:45,932 INFO L495 AbstractCegarLoop]: Abstraction has has 146 places, 203 transitions, 2061 flow [2024-06-04 14:26:45,932 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.285714285714285) internal successors, (135), 7 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:26:45,932 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:26:45,932 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:26:45,932 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2024-06-04 14:26:45,932 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)] === [2024-06-04 14:26:45,933 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:26:45,933 INFO L85 PathProgramCache]: Analyzing trace with hash -1283882509, now seen corresponding path program 2 times [2024-06-04 14:26:45,933 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:26:45,933 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [436583136] [2024-06-04 14:26:45,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:26:45,933 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:26:45,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:26:46,162 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:26:46,162 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:26:46,162 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [436583136] [2024-06-04 14:26:46,162 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [436583136] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:26:46,162 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:26:46,163 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-04 14:26:46,163 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2118258105] [2024-06-04 14:26:46,163 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:26:46,163 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-04 14:26:46,163 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:26:46,164 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-04 14:26:46,164 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-04 14:26:46,214 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 52 [2024-06-04 14:26:46,214 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 146 places, 203 transitions, 2061 flow. Second operand has 7 states, 7 states have (on average 19.285714285714285) internal successors, (135), 7 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:26:46,214 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:26:46,214 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 52 [2024-06-04 14:26:46,214 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:26:47,240 INFO L124 PetriNetUnfolderBase]: 6164/9018 cut-off events. [2024-06-04 14:26:47,241 INFO L125 PetriNetUnfolderBase]: For 221400/221410 co-relation queries the response was YES. [2024-06-04 14:26:47,287 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53716 conditions, 9018 events. 6164/9018 cut-off events. For 221400/221410 co-relation queries the response was YES. Maximal size of possible extension queue 389. Compared 52072 event pairs, 2299 based on Foata normal form. 10/9024 useless extension candidates. Maximal degree in co-relation 53645. Up to 8457 conditions per place. [2024-06-04 14:26:47,325 INFO L140 encePairwiseOnDemand]: 42/52 looper letters, 199 selfloop transitions, 33 changer transitions 0/241 dead transitions. [2024-06-04 14:26:47,325 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 152 places, 241 transitions, 2781 flow [2024-06-04 14:26:47,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 14:26:47,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 14:26:47,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 207 transitions. [2024-06-04 14:26:47,326 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5686813186813187 [2024-06-04 14:26:47,327 INFO L175 Difference]: Start difference. First operand has 146 places, 203 transitions, 2061 flow. Second operand 7 states and 207 transitions. [2024-06-04 14:26:47,327 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 152 places, 241 transitions, 2781 flow [2024-06-04 14:26:47,594 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 150 places, 241 transitions, 2697 flow, removed 26 selfloop flow, removed 2 redundant places. [2024-06-04 14:26:47,597 INFO L231 Difference]: Finished difference. Result has 152 places, 209 transitions, 2127 flow [2024-06-04 14:26:47,597 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=1987, PETRI_DIFFERENCE_MINUEND_PLACES=144, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=203, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=175, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2127, PETRI_PLACES=152, PETRI_TRANSITIONS=209} [2024-06-04 14:26:47,598 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 97 predicate places. [2024-06-04 14:26:47,598 INFO L495 AbstractCegarLoop]: Abstraction has has 152 places, 209 transitions, 2127 flow [2024-06-04 14:26:47,598 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.285714285714285) internal successors, (135), 7 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:26:47,598 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:26:47,599 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:26:47,599 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2024-06-04 14:26:47,599 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)] === [2024-06-04 14:26:47,599 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:26:47,599 INFO L85 PathProgramCache]: Analyzing trace with hash -1283888089, now seen corresponding path program 3 times [2024-06-04 14:26:47,599 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:26:47,599 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [137421048] [2024-06-04 14:26:47,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:26:47,600 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:26:47,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:26:47,811 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:26:47,811 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:26:47,811 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [137421048] [2024-06-04 14:26:47,811 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [137421048] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:26:47,811 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:26:47,811 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-04 14:26:47,812 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1589123470] [2024-06-04 14:26:47,812 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:26:47,812 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-04 14:26:47,812 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:26:47,812 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-04 14:26:47,813 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-04 14:26:47,872 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 52 [2024-06-04 14:26:47,873 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 152 places, 209 transitions, 2127 flow. Second operand has 7 states, 7 states have (on average 19.285714285714285) internal successors, (135), 7 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:26:47,873 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:26:47,873 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 52 [2024-06-04 14:26:47,873 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:26:48,852 INFO L124 PetriNetUnfolderBase]: 6157/9008 cut-off events. [2024-06-04 14:26:48,852 INFO L125 PetriNetUnfolderBase]: For 233096/233106 co-relation queries the response was YES. [2024-06-04 14:26:48,899 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53818 conditions, 9008 events. 6157/9008 cut-off events. For 233096/233106 co-relation queries the response was YES. Maximal size of possible extension queue 389. Compared 51929 event pairs, 2307 based on Foata normal form. 8/9011 useless extension candidates. Maximal degree in co-relation 53745. Up to 8450 conditions per place. [2024-06-04 14:26:48,939 INFO L140 encePairwiseOnDemand]: 42/52 looper letters, 191 selfloop transitions, 31 changer transitions 0/231 dead transitions. [2024-06-04 14:26:48,940 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 156 places, 231 transitions, 2631 flow [2024-06-04 14:26:48,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-04 14:26:48,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-04 14:26:48,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 156 transitions. [2024-06-04 14:26:48,941 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6 [2024-06-04 14:26:48,941 INFO L175 Difference]: Start difference. First operand has 152 places, 209 transitions, 2127 flow. Second operand 5 states and 156 transitions. [2024-06-04 14:26:48,941 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 156 places, 231 transitions, 2631 flow [2024-06-04 14:26:49,191 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 152 places, 231 transitions, 2521 flow, removed 23 selfloop flow, removed 4 redundant places. [2024-06-04 14:26:49,194 INFO L231 Difference]: Finished difference. Result has 153 places, 209 transitions, 2088 flow [2024-06-04 14:26:49,194 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=2017, PETRI_DIFFERENCE_MINUEND_PLACES=148, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=209, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=178, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=2088, PETRI_PLACES=153, PETRI_TRANSITIONS=209} [2024-06-04 14:26:49,195 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 98 predicate places. [2024-06-04 14:26:49,195 INFO L495 AbstractCegarLoop]: Abstraction has has 153 places, 209 transitions, 2088 flow [2024-06-04 14:26:49,195 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.285714285714285) internal successors, (135), 7 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:26:49,195 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:26:49,195 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:26:49,195 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2024-06-04 14:26:49,196 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)] === [2024-06-04 14:26:49,196 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:26:49,196 INFO L85 PathProgramCache]: Analyzing trace with hash -1298363159, now seen corresponding path program 1 times [2024-06-04 14:26:49,196 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:26:49,196 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1952792306] [2024-06-04 14:26:49,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:26:49,196 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:26:49,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:26:49,342 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:26:49,343 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:26:49,343 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1952792306] [2024-06-04 14:26:49,343 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1952792306] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:26:49,343 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:26:49,343 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-04 14:26:49,343 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1854347597] [2024-06-04 14:26:49,344 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:26:49,344 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-04 14:26:49,344 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:26:49,344 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-04 14:26:49,345 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-04 14:26:49,381 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 52 [2024-06-04 14:26:49,381 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 153 places, 209 transitions, 2088 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) [2024-06-04 14:26:49,381 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:26:49,382 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 52 [2024-06-04 14:26:49,382 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:26:50,386 INFO L124 PetriNetUnfolderBase]: 6897/10158 cut-off events. [2024-06-04 14:26:50,386 INFO L125 PetriNetUnfolderBase]: For 318594/318755 co-relation queries the response was YES. [2024-06-04 14:26:50,455 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62319 conditions, 10158 events. 6897/10158 cut-off events. For 318594/318755 co-relation queries the response was YES. Maximal size of possible extension queue 447. Compared 60332 event pairs, 2392 based on Foata normal form. 45/9978 useless extension candidates. Maximal degree in co-relation 62245. Up to 9062 conditions per place. [2024-06-04 14:26:50,502 INFO L140 encePairwiseOnDemand]: 45/52 looper letters, 178 selfloop transitions, 18 changer transitions 0/239 dead transitions. [2024-06-04 14:26:50,502 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 156 places, 239 transitions, 2726 flow [2024-06-04 14:26:50,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-04 14:26:50,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-04 14:26:50,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 123 transitions. [2024-06-04 14:26:50,503 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5913461538461539 [2024-06-04 14:26:50,503 INFO L175 Difference]: Start difference. First operand has 153 places, 209 transitions, 2088 flow. Second operand 4 states and 123 transitions. [2024-06-04 14:26:50,503 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 156 places, 239 transitions, 2726 flow [2024-06-04 14:26:51,008 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 152 places, 239 transitions, 2656 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-06-04 14:26:51,011 INFO L231 Difference]: Finished difference. Result has 154 places, 226 transitions, 2311 flow [2024-06-04 14:26:51,011 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=2026, PETRI_DIFFERENCE_MINUEND_PLACES=149, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=209, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=192, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=2311, PETRI_PLACES=154, PETRI_TRANSITIONS=226} [2024-06-04 14:26:51,012 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 99 predicate places. [2024-06-04 14:26:51,012 INFO L495 AbstractCegarLoop]: Abstraction has has 154 places, 226 transitions, 2311 flow [2024-06-04 14:26:51,012 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) [2024-06-04 14:26:51,012 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:26:51,012 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:26:51,013 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2024-06-04 14:26:51,013 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)] === [2024-06-04 14:26:51,013 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:26:51,013 INFO L85 PathProgramCache]: Analyzing trace with hash 2081619046, now seen corresponding path program 1 times [2024-06-04 14:26:51,013 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:26:51,013 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1765326791] [2024-06-04 14:26:51,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:26:51,014 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:26:51,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:26:51,211 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:26:51,211 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:26:51,211 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1765326791] [2024-06-04 14:26:51,211 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1765326791] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:26:51,211 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:26:51,211 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-04 14:26:51,212 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1775676924] [2024-06-04 14:26:51,212 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:26:51,212 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-04 14:26:51,212 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:26:51,213 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-04 14:26:51,213 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-04 14:26:51,294 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 52 [2024-06-04 14:26:51,294 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 154 places, 226 transitions, 2311 flow. Second operand has 7 states, 7 states have (on average 20.285714285714285) internal successors, (142), 7 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:26:51,295 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:26:51,295 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 52 [2024-06-04 14:26:51,295 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:26:52,418 INFO L124 PetriNetUnfolderBase]: 6790/10088 cut-off events. [2024-06-04 14:26:52,418 INFO L125 PetriNetUnfolderBase]: For 343893/344483 co-relation queries the response was YES. [2024-06-04 14:26:52,495 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65929 conditions, 10088 events. 6790/10088 cut-off events. For 343893/344483 co-relation queries the response was YES. Maximal size of possible extension queue 451. Compared 60365 event pairs, 2033 based on Foata normal form. 73/9793 useless extension candidates. Maximal degree in co-relation 65853. Up to 8986 conditions per place. [2024-06-04 14:26:52,546 INFO L140 encePairwiseOnDemand]: 43/52 looper letters, 176 selfloop transitions, 61 changer transitions 0/264 dead transitions. [2024-06-04 14:26:52,546 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 159 places, 264 transitions, 3095 flow [2024-06-04 14:26:52,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-04 14:26:52,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-04 14:26:52,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 190 transitions. [2024-06-04 14:26:52,548 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6089743589743589 [2024-06-04 14:26:52,548 INFO L175 Difference]: Start difference. First operand has 154 places, 226 transitions, 2311 flow. Second operand 6 states and 190 transitions. [2024-06-04 14:26:52,548 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 159 places, 264 transitions, 3095 flow [2024-06-04 14:26:52,960 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 159 places, 264 transitions, 3075 flow, removed 10 selfloop flow, removed 0 redundant places. [2024-06-04 14:26:52,963 INFO L231 Difference]: Finished difference. Result has 160 places, 232 transitions, 2539 flow [2024-06-04 14:26:52,964 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=2291, PETRI_DIFFERENCE_MINUEND_PLACES=154, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=226, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=58, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=168, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2539, PETRI_PLACES=160, PETRI_TRANSITIONS=232} [2024-06-04 14:26:52,965 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 105 predicate places. [2024-06-04 14:26:52,965 INFO L495 AbstractCegarLoop]: Abstraction has has 160 places, 232 transitions, 2539 flow [2024-06-04 14:26:52,965 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 20.285714285714285) internal successors, (142), 7 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:26:52,965 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:26:52,965 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:26:52,965 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2024-06-04 14:26:52,966 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)] === [2024-06-04 14:26:52,966 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:26:52,966 INFO L85 PathProgramCache]: Analyzing trace with hash -1367779226, now seen corresponding path program 2 times [2024-06-04 14:26:52,966 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:26:52,966 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1315654310] [2024-06-04 14:26:52,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:26:52,966 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:26:52,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:26:53,221 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:26:53,222 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:26:53,222 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1315654310] [2024-06-04 14:26:53,222 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1315654310] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:26:53,222 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:26:53,222 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-04 14:26:53,223 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1942090898] [2024-06-04 14:26:53,223 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:26:53,223 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-04 14:26:53,223 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:26:53,223 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-04 14:26:53,224 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-04 14:26:53,273 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 52 [2024-06-04 14:26:53,274 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 160 places, 232 transitions, 2539 flow. Second operand has 7 states, 7 states have (on average 20.285714285714285) internal successors, (142), 7 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:26:53,274 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:26:53,274 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 52 [2024-06-04 14:26:53,274 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:26:54,559 INFO L124 PetriNetUnfolderBase]: 6847/10169 cut-off events. [2024-06-04 14:26:54,559 INFO L125 PetriNetUnfolderBase]: For 373860/374526 co-relation queries the response was YES. [2024-06-04 14:26:54,610 INFO L83 FinitePrefix]: Finished finitePrefix Result has 68566 conditions, 10169 events. 6847/10169 cut-off events. For 373860/374526 co-relation queries the response was YES. Maximal size of possible extension queue 453. Compared 60989 event pairs, 2199 based on Foata normal form. 58/9859 useless extension candidates. Maximal degree in co-relation 68487. Up to 9207 conditions per place. [2024-06-04 14:26:54,653 INFO L140 encePairwiseOnDemand]: 43/52 looper letters, 177 selfloop transitions, 57 changer transitions 0/261 dead transitions. [2024-06-04 14:26:54,653 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 165 places, 261 transitions, 3135 flow [2024-06-04 14:26:54,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-04 14:26:54,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-04 14:26:54,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 184 transitions. [2024-06-04 14:26:54,654 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5897435897435898 [2024-06-04 14:26:54,654 INFO L175 Difference]: Start difference. First operand has 160 places, 232 transitions, 2539 flow. Second operand 6 states and 184 transitions. [2024-06-04 14:26:54,654 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 165 places, 261 transitions, 3135 flow [2024-06-04 14:26:55,142 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 163 places, 261 transitions, 2993 flow, removed 41 selfloop flow, removed 2 redundant places. [2024-06-04 14:26:55,146 INFO L231 Difference]: Finished difference. Result has 164 places, 235 transitions, 2588 flow [2024-06-04 14:26:55,146 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=2415, PETRI_DIFFERENCE_MINUEND_PLACES=158, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=232, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=54, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=175, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2588, PETRI_PLACES=164, PETRI_TRANSITIONS=235} [2024-06-04 14:26:55,146 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 109 predicate places. [2024-06-04 14:26:55,146 INFO L495 AbstractCegarLoop]: Abstraction has has 164 places, 235 transitions, 2588 flow [2024-06-04 14:26:55,147 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 20.285714285714285) internal successors, (142), 7 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:26:55,147 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:26:55,147 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:26:55,147 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2024-06-04 14:26:55,147 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)] === [2024-06-04 14:26:55,147 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:26:55,147 INFO L85 PathProgramCache]: Analyzing trace with hash -1145828058, now seen corresponding path program 3 times [2024-06-04 14:26:55,148 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:26:55,148 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1809957798] [2024-06-04 14:26:55,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:26:55,148 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:26:55,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:26:55,383 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:26:55,383 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:26:55,383 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1809957798] [2024-06-04 14:26:55,383 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1809957798] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:26:55,383 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:26:55,383 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-04 14:26:55,384 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [561778851] [2024-06-04 14:26:55,384 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:26:55,384 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-04 14:26:55,384 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:26:55,385 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-04 14:26:55,385 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-04 14:26:55,473 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 52 [2024-06-04 14:26:55,474 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 164 places, 235 transitions, 2588 flow. Second operand has 7 states, 7 states have (on average 20.285714285714285) internal successors, (142), 7 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:26:55,474 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:26:55,474 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 52 [2024-06-04 14:26:55,474 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:26:56,677 INFO L124 PetriNetUnfolderBase]: 6820/10134 cut-off events. [2024-06-04 14:26:56,678 INFO L125 PetriNetUnfolderBase]: For 388223/388881 co-relation queries the response was YES. [2024-06-04 14:26:56,748 INFO L83 FinitePrefix]: Finished finitePrefix Result has 68388 conditions, 10134 events. 6820/10134 cut-off events. For 388223/388881 co-relation queries the response was YES. Maximal size of possible extension queue 450. Compared 60715 event pairs, 2023 based on Foata normal form. 86/9854 useless extension candidates. Maximal degree in co-relation 68307. Up to 9124 conditions per place. [2024-06-04 14:26:56,796 INFO L140 encePairwiseOnDemand]: 43/52 looper letters, 180 selfloop transitions, 53 changer transitions 0/260 dead transitions. [2024-06-04 14:26:56,796 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 168 places, 260 transitions, 3118 flow [2024-06-04 14:26:56,797 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-04 14:26:56,797 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-04 14:26:56,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 162 transitions. [2024-06-04 14:26:56,797 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6230769230769231 [2024-06-04 14:26:56,797 INFO L175 Difference]: Start difference. First operand has 164 places, 235 transitions, 2588 flow. Second operand 5 states and 162 transitions. [2024-06-04 14:26:56,797 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 168 places, 260 transitions, 3118 flow [2024-06-04 14:26:57,393 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 164 places, 260 transitions, 2957 flow, removed 26 selfloop flow, removed 4 redundant places. [2024-06-04 14:26:57,396 INFO L231 Difference]: Finished difference. Result has 165 places, 235 transitions, 2547 flow [2024-06-04 14:26:57,397 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=2427, PETRI_DIFFERENCE_MINUEND_PLACES=160, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=235, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=182, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=2547, PETRI_PLACES=165, PETRI_TRANSITIONS=235} [2024-06-04 14:26:57,397 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 110 predicate places. [2024-06-04 14:26:57,397 INFO L495 AbstractCegarLoop]: Abstraction has has 165 places, 235 transitions, 2547 flow [2024-06-04 14:26:57,398 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 20.285714285714285) internal successors, (142), 7 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:26:57,398 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:26:57,398 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:26:57,398 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2024-06-04 14:26:57,398 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)] === [2024-06-04 14:26:57,398 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:26:57,398 INFO L85 PathProgramCache]: Analyzing trace with hash 374736100, now seen corresponding path program 1 times [2024-06-04 14:26:57,399 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:26:57,399 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1927285747] [2024-06-04 14:26:57,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:26:57,399 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:26:57,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:26:57,608 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:26:57,609 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:26:57,609 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1927285747] [2024-06-04 14:26:57,609 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1927285747] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:26:57,609 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:26:57,609 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 14:26:57,609 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1763436689] [2024-06-04 14:26:57,609 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:26:57,610 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 14:26:57,610 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:26:57,610 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 14:26:57,610 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-04 14:26:57,697 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 52 [2024-06-04 14:26:57,698 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 165 places, 235 transitions, 2547 flow. Second operand has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:26:57,698 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:26:57,698 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 52 [2024-06-04 14:26:57,698 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:26:59,058 INFO L124 PetriNetUnfolderBase]: 7825/11383 cut-off events. [2024-06-04 14:26:59,058 INFO L125 PetriNetUnfolderBase]: For 374029/374053 co-relation queries the response was YES. [2024-06-04 14:26:59,134 INFO L83 FinitePrefix]: Finished finitePrefix Result has 71024 conditions, 11383 events. 7825/11383 cut-off events. For 374029/374053 co-relation queries the response was YES. Maximal size of possible extension queue 452. Compared 65983 event pairs, 2105 based on Foata normal form. 28/11406 useless extension candidates. Maximal degree in co-relation 70942. Up to 10367 conditions per place. [2024-06-04 14:26:59,183 INFO L140 encePairwiseOnDemand]: 42/52 looper letters, 247 selfloop transitions, 39 changer transitions 0/294 dead transitions. [2024-06-04 14:26:59,183 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 171 places, 294 transitions, 3493 flow [2024-06-04 14:26:59,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 14:26:59,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 14:26:59,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 213 transitions. [2024-06-04 14:26:59,184 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5851648351648352 [2024-06-04 14:26:59,184 INFO L175 Difference]: Start difference. First operand has 165 places, 235 transitions, 2547 flow. Second operand 7 states and 213 transitions. [2024-06-04 14:26:59,184 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 171 places, 294 transitions, 3493 flow [2024-06-04 14:26:59,657 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 167 places, 294 transitions, 3376 flow, removed 3 selfloop flow, removed 4 redundant places. [2024-06-04 14:26:59,660 INFO L231 Difference]: Finished difference. Result has 170 places, 245 transitions, 2637 flow [2024-06-04 14:26:59,660 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=2430, PETRI_DIFFERENCE_MINUEND_PLACES=161, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=235, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=200, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2637, PETRI_PLACES=170, PETRI_TRANSITIONS=245} [2024-06-04 14:26:59,667 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 115 predicate places. [2024-06-04 14:26:59,667 INFO L495 AbstractCegarLoop]: Abstraction has has 170 places, 245 transitions, 2637 flow [2024-06-04 14:26:59,668 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:26:59,668 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:26:59,668 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:26:59,668 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2024-06-04 14:26:59,668 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)] === [2024-06-04 14:26:59,668 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:26:59,668 INFO L85 PathProgramCache]: Analyzing trace with hash 640433380, now seen corresponding path program 2 times [2024-06-04 14:26:59,669 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:26:59,669 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [691072023] [2024-06-04 14:26:59,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:26:59,670 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:26:59,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:26:59,885 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:26:59,886 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:26:59,886 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [691072023] [2024-06-04 14:26:59,886 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [691072023] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:26:59,886 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:26:59,886 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 14:26:59,886 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1072563574] [2024-06-04 14:26:59,887 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:26:59,887 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 14:26:59,887 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:26:59,888 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 14:26:59,888 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-04 14:26:59,946 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 52 [2024-06-04 14:26:59,946 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 170 places, 245 transitions, 2637 flow. Second operand has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:26:59,946 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:26:59,946 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 52 [2024-06-04 14:26:59,946 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:27:01,414 INFO L124 PetriNetUnfolderBase]: 8065/11719 cut-off events. [2024-06-04 14:27:01,415 INFO L125 PetriNetUnfolderBase]: For 406759/406783 co-relation queries the response was YES. [2024-06-04 14:27:01,476 INFO L83 FinitePrefix]: Finished finitePrefix Result has 74650 conditions, 11719 events. 8065/11719 cut-off events. For 406759/406783 co-relation queries the response was YES. Maximal size of possible extension queue 465. Compared 68121 event pairs, 2589 based on Foata normal form. 28/11742 useless extension candidates. Maximal degree in co-relation 74565. Up to 10803 conditions per place. [2024-06-04 14:27:01,522 INFO L140 encePairwiseOnDemand]: 42/52 looper letters, 251 selfloop transitions, 36 changer transitions 0/295 dead transitions. [2024-06-04 14:27:01,522 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 176 places, 295 transitions, 3546 flow [2024-06-04 14:27:01,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 14:27:01,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 14:27:01,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 210 transitions. [2024-06-04 14:27:01,523 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5769230769230769 [2024-06-04 14:27:01,523 INFO L175 Difference]: Start difference. First operand has 170 places, 245 transitions, 2637 flow. Second operand 7 states and 210 transitions. [2024-06-04 14:27:01,523 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 176 places, 295 transitions, 3546 flow [2024-06-04 14:27:02,112 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 174 places, 295 transitions, 3494 flow, removed 10 selfloop flow, removed 2 redundant places. [2024-06-04 14:27:02,115 INFO L231 Difference]: Finished difference. Result has 176 places, 251 transitions, 2745 flow [2024-06-04 14:27:02,115 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=2589, PETRI_DIFFERENCE_MINUEND_PLACES=168, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=245, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=211, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2745, PETRI_PLACES=176, PETRI_TRANSITIONS=251} [2024-06-04 14:27:02,115 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 121 predicate places. [2024-06-04 14:27:02,115 INFO L495 AbstractCegarLoop]: Abstraction has has 176 places, 251 transitions, 2745 flow [2024-06-04 14:27:02,116 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:27:02,116 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:27:02,116 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:27:02,116 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2024-06-04 14:27:02,116 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)] === [2024-06-04 14:27:02,116 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:27:02,117 INFO L85 PathProgramCache]: Analyzing trace with hash 640759810, now seen corresponding path program 3 times [2024-06-04 14:27:02,117 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:27:02,117 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1567511314] [2024-06-04 14:27:02,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:27:02,117 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:27:02,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:27:02,315 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:27:02,315 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:27:02,316 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1567511314] [2024-06-04 14:27:02,316 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1567511314] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:27:02,316 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:27:02,316 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 14:27:02,316 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1456565850] [2024-06-04 14:27:02,316 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:27:02,316 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 14:27:02,317 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:27:02,317 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 14:27:02,317 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-04 14:27:02,366 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 52 [2024-06-04 14:27:02,367 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 176 places, 251 transitions, 2745 flow. Second operand has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:27:02,367 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:27:02,367 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 52 [2024-06-04 14:27:02,367 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:27:03,698 INFO L124 PetriNetUnfolderBase]: 8021/11659 cut-off events. [2024-06-04 14:27:03,698 INFO L125 PetriNetUnfolderBase]: For 421216/421240 co-relation queries the response was YES. [2024-06-04 14:27:03,780 INFO L83 FinitePrefix]: Finished finitePrefix Result has 74749 conditions, 11659 events. 8021/11659 cut-off events. For 421216/421240 co-relation queries the response was YES. Maximal size of possible extension queue 457. Compared 67755 event pairs, 2588 based on Foata normal form. 32/11686 useless extension candidates. Maximal degree in co-relation 74661. Up to 10866 conditions per place. [2024-06-04 14:27:03,830 INFO L140 encePairwiseOnDemand]: 42/52 looper letters, 250 selfloop transitions, 33 changer transitions 0/291 dead transitions. [2024-06-04 14:27:03,831 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 182 places, 291 transitions, 3444 flow [2024-06-04 14:27:03,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 14:27:03,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 14:27:03,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 205 transitions. [2024-06-04 14:27:03,832 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5631868131868132 [2024-06-04 14:27:03,832 INFO L175 Difference]: Start difference. First operand has 176 places, 251 transitions, 2745 flow. Second operand 7 states and 205 transitions. [2024-06-04 14:27:03,832 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 182 places, 291 transitions, 3444 flow [2024-06-04 14:27:04,516 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 179 places, 291 transitions, 3398 flow, removed 6 selfloop flow, removed 3 redundant places. [2024-06-04 14:27:04,520 INFO L231 Difference]: Finished difference. Result has 180 places, 252 transitions, 2789 flow [2024-06-04 14:27:04,520 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=2701, PETRI_DIFFERENCE_MINUEND_PLACES=173, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=251, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=218, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2789, PETRI_PLACES=180, PETRI_TRANSITIONS=252} [2024-06-04 14:27:04,520 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 125 predicate places. [2024-06-04 14:27:04,520 INFO L495 AbstractCegarLoop]: Abstraction has has 180 places, 252 transitions, 2789 flow [2024-06-04 14:27:04,521 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:27:04,521 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:27:04,521 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:27:04,521 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2024-06-04 14:27:04,521 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)] === [2024-06-04 14:27:04,521 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:27:04,521 INFO L85 PathProgramCache]: Analyzing trace with hash 463273960, now seen corresponding path program 1 times [2024-06-04 14:27:04,522 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:27:04,522 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [665344324] [2024-06-04 14:27:04,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:27:04,522 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:27:04,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:27:04,723 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:27:04,723 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:27:04,723 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [665344324] [2024-06-04 14:27:04,723 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [665344324] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:27:04,723 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:27:04,724 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 14:27:04,724 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [291531488] [2024-06-04 14:27:04,724 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:27:04,724 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 14:27:04,724 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:27:04,725 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 14:27:04,725 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2024-06-04 14:27:04,797 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 52 [2024-06-04 14:27:04,797 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 180 places, 252 transitions, 2789 flow. Second operand has 8 states, 8 states have (on average 19.125) internal successors, (153), 8 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:27:04,797 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:27:04,797 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 52 [2024-06-04 14:27:04,797 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:27:06,199 INFO L124 PetriNetUnfolderBase]: 7665/11275 cut-off events. [2024-06-04 14:27:06,200 INFO L125 PetriNetUnfolderBase]: For 482567/483436 co-relation queries the response was YES. [2024-06-04 14:27:06,287 INFO L83 FinitePrefix]: Finished finitePrefix Result has 76756 conditions, 11275 events. 7665/11275 cut-off events. For 482567/483436 co-relation queries the response was YES. Maximal size of possible extension queue 474. Compared 67541 event pairs, 2313 based on Foata normal form. 124/10980 useless extension candidates. Maximal degree in co-relation 76666. Up to 9935 conditions per place. [2024-06-04 14:27:06,344 INFO L140 encePairwiseOnDemand]: 41/52 looper letters, 184 selfloop transitions, 93 changer transitions 0/307 dead transitions. [2024-06-04 14:27:06,344 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 186 places, 307 transitions, 3929 flow [2024-06-04 14:27:06,344 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 14:27:06,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 14:27:06,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 223 transitions. [2024-06-04 14:27:06,345 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6126373626373627 [2024-06-04 14:27:06,345 INFO L175 Difference]: Start difference. First operand has 180 places, 252 transitions, 2789 flow. Second operand 7 states and 223 transitions. [2024-06-04 14:27:06,345 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 186 places, 307 transitions, 3929 flow [2024-06-04 14:27:07,235 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 181 places, 307 transitions, 3865 flow, removed 1 selfloop flow, removed 5 redundant places. [2024-06-04 14:27:07,238 INFO L231 Difference]: Finished difference. Result has 182 places, 264 transitions, 3120 flow [2024-06-04 14:27:07,239 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=2725, PETRI_DIFFERENCE_MINUEND_PLACES=175, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=252, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=85, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=167, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3120, PETRI_PLACES=182, PETRI_TRANSITIONS=264} [2024-06-04 14:27:07,239 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 127 predicate places. [2024-06-04 14:27:07,239 INFO L495 AbstractCegarLoop]: Abstraction has has 182 places, 264 transitions, 3120 flow [2024-06-04 14:27:07,239 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 19.125) internal successors, (153), 8 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:27:07,239 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:27:07,239 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:27:07,240 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2024-06-04 14:27:07,240 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)] === [2024-06-04 14:27:07,240 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:27:07,240 INFO L85 PathProgramCache]: Analyzing trace with hash 463394116, now seen corresponding path program 1 times [2024-06-04 14:27:07,240 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:27:07,240 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1390519998] [2024-06-04 14:27:07,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:27:07,241 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:27:07,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:27:07,443 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:27:07,444 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:27:07,444 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1390519998] [2024-06-04 14:27:07,444 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1390519998] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:27:07,444 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:27:07,444 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 14:27:07,444 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [372518637] [2024-06-04 14:27:07,444 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:27:07,445 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 14:27:07,445 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:27:07,445 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 14:27:07,445 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2024-06-04 14:27:07,504 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 52 [2024-06-04 14:27:07,505 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 182 places, 264 transitions, 3120 flow. Second operand has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:27:07,505 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:27:07,505 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 52 [2024-06-04 14:27:07,505 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:27:08,914 INFO L124 PetriNetUnfolderBase]: 8133/11891 cut-off events. [2024-06-04 14:27:08,914 INFO L125 PetriNetUnfolderBase]: For 468462/468500 co-relation queries the response was YES. [2024-06-04 14:27:08,987 INFO L83 FinitePrefix]: Finished finitePrefix Result has 79128 conditions, 11891 events. 8133/11891 cut-off events. For 468462/468500 co-relation queries the response was YES. Maximal size of possible extension queue 461. Compared 70067 event pairs, 2602 based on Foata normal form. 30/11914 useless extension candidates. Maximal degree in co-relation 79037. Up to 10882 conditions per place. [2024-06-04 14:27:09,038 INFO L140 encePairwiseOnDemand]: 41/52 looper letters, 263 selfloop transitions, 63 changer transitions 0/334 dead transitions. [2024-06-04 14:27:09,038 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 188 places, 334 transitions, 4478 flow [2024-06-04 14:27:09,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 14:27:09,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 14:27:09,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 214 transitions. [2024-06-04 14:27:09,039 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5879120879120879 [2024-06-04 14:27:09,039 INFO L175 Difference]: Start difference. First operand has 182 places, 264 transitions, 3120 flow. Second operand 7 states and 214 transitions. [2024-06-04 14:27:09,039 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 188 places, 334 transitions, 4478 flow [2024-06-04 14:27:09,866 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 186 places, 334 transitions, 4332 flow, removed 41 selfloop flow, removed 2 redundant places. [2024-06-04 14:27:09,870 INFO L231 Difference]: Finished difference. Result has 190 places, 289 transitions, 3466 flow [2024-06-04 14:27:09,870 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=2982, PETRI_DIFFERENCE_MINUEND_PLACES=180, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=264, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=212, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3466, PETRI_PLACES=190, PETRI_TRANSITIONS=289} [2024-06-04 14:27:09,870 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 135 predicate places. [2024-06-04 14:27:09,871 INFO L495 AbstractCegarLoop]: Abstraction has has 190 places, 289 transitions, 3466 flow [2024-06-04 14:27:09,871 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:27:09,871 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:27:09,871 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:27:09,871 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2024-06-04 14:27:09,871 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)] === [2024-06-04 14:27:09,871 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:27:09,872 INFO L85 PathProgramCache]: Analyzing trace with hash 463393930, now seen corresponding path program 2 times [2024-06-04 14:27:09,872 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:27:09,872 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1364359829] [2024-06-04 14:27:09,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:27:09,872 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:27:09,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:27:10,071 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:27:10,072 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:27:10,072 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1364359829] [2024-06-04 14:27:10,072 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1364359829] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:27:10,072 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:27:10,072 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 14:27:10,073 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [282601690] [2024-06-04 14:27:10,073 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:27:10,073 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 14:27:10,073 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:27:10,073 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 14:27:10,074 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-04 14:27:10,135 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 52 [2024-06-04 14:27:10,135 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 190 places, 289 transitions, 3466 flow. Second operand has 8 states, 8 states have (on average 19.125) internal successors, (153), 8 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:27:10,135 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:27:10,135 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 52 [2024-06-04 14:27:10,135 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:27:11,774 INFO L124 PetriNetUnfolderBase]: 7749/11408 cut-off events. [2024-06-04 14:27:11,774 INFO L125 PetriNetUnfolderBase]: For 550439/551718 co-relation queries the response was YES. [2024-06-04 14:27:11,838 INFO L83 FinitePrefix]: Finished finitePrefix Result has 82498 conditions, 11408 events. 7749/11408 cut-off events. For 550439/551718 co-relation queries the response was YES. Maximal size of possible extension queue 476. Compared 68558 event pairs, 2276 based on Foata normal form. 69/11103 useless extension candidates. Maximal degree in co-relation 82402. Up to 10234 conditions per place. [2024-06-04 14:27:11,889 INFO L140 encePairwiseOnDemand]: 41/52 looper letters, 215 selfloop transitions, 83 changer transitions 0/332 dead transitions. [2024-06-04 14:27:11,889 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 196 places, 332 transitions, 4245 flow [2024-06-04 14:27:11,889 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 14:27:11,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 14:27:11,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 213 transitions. [2024-06-04 14:27:11,890 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5851648351648352 [2024-06-04 14:27:11,890 INFO L175 Difference]: Start difference. First operand has 190 places, 289 transitions, 3466 flow. Second operand 7 states and 213 transitions. [2024-06-04 14:27:11,890 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 196 places, 332 transitions, 4245 flow [2024-06-04 14:27:12,952 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 195 places, 332 transitions, 4163 flow, removed 32 selfloop flow, removed 1 redundant places. [2024-06-04 14:27:12,956 INFO L231 Difference]: Finished difference. Result has 196 places, 297 transitions, 3661 flow [2024-06-04 14:27:12,956 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=3384, PETRI_DIFFERENCE_MINUEND_PLACES=189, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=289, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=75, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=210, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3661, PETRI_PLACES=196, PETRI_TRANSITIONS=297} [2024-06-04 14:27:12,957 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 141 predicate places. [2024-06-04 14:27:12,957 INFO L495 AbstractCegarLoop]: Abstraction has has 196 places, 297 transitions, 3661 flow [2024-06-04 14:27:12,957 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 19.125) internal successors, (153), 8 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:27:12,957 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:27:12,957 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:27:12,957 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2024-06-04 14:27:12,958 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)] === [2024-06-04 14:27:12,958 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:27:12,958 INFO L85 PathProgramCache]: Analyzing trace with hash -1489162500, now seen corresponding path program 2 times [2024-06-04 14:27:12,958 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:27:12,958 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [287435000] [2024-06-04 14:27:12,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:27:12,958 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:27:12,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:27:13,148 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:27:13,148 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:27:13,148 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [287435000] [2024-06-04 14:27:13,148 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [287435000] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:27:13,148 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:27:13,148 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 14:27:13,149 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2082936528] [2024-06-04 14:27:13,149 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:27:13,149 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 14:27:13,149 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:27:13,149 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 14:27:13,149 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2024-06-04 14:27:13,201 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 52 [2024-06-04 14:27:13,201 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 196 places, 297 transitions, 3661 flow. Second operand has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:27:13,201 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:27:13,201 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 52 [2024-06-04 14:27:13,201 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:27:14,695 INFO L124 PetriNetUnfolderBase]: 8257/12073 cut-off events. [2024-06-04 14:27:14,695 INFO L125 PetriNetUnfolderBase]: For 525198/525239 co-relation queries the response was YES. [2024-06-04 14:27:14,800 INFO L83 FinitePrefix]: Finished finitePrefix Result has 83849 conditions, 12073 events. 8257/12073 cut-off events. For 525198/525239 co-relation queries the response was YES. Maximal size of possible extension queue 465. Compared 71170 event pairs, 2602 based on Foata normal form. 33/12099 useless extension candidates. Maximal degree in co-relation 83751. Up to 11010 conditions per place. [2024-06-04 14:27:15,069 INFO L140 encePairwiseOnDemand]: 41/52 looper letters, 270 selfloop transitions, 81 changer transitions 0/359 dead transitions. [2024-06-04 14:27:15,069 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 202 places, 359 transitions, 5049 flow [2024-06-04 14:27:15,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 14:27:15,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 14:27:15,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 211 transitions. [2024-06-04 14:27:15,070 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5796703296703297 [2024-06-04 14:27:15,071 INFO L175 Difference]: Start difference. First operand has 196 places, 297 transitions, 3661 flow. Second operand 7 states and 211 transitions. [2024-06-04 14:27:15,071 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 202 places, 359 transitions, 5049 flow [2024-06-04 14:27:16,140 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 198 places, 359 transitions, 4833 flow, removed 22 selfloop flow, removed 4 redundant places. [2024-06-04 14:27:16,144 INFO L231 Difference]: Finished difference. Result has 201 places, 318 transitions, 3930 flow [2024-06-04 14:27:16,144 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=3465, PETRI_DIFFERENCE_MINUEND_PLACES=192, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=297, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=60, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=234, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3930, PETRI_PLACES=201, PETRI_TRANSITIONS=318} [2024-06-04 14:27:16,145 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 146 predicate places. [2024-06-04 14:27:16,145 INFO L495 AbstractCegarLoop]: Abstraction has has 201 places, 318 transitions, 3930 flow [2024-06-04 14:27:16,145 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:27:16,146 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:27:16,146 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:27:16,146 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2024-06-04 14:27:16,146 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)] === [2024-06-04 14:27:16,146 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:27:16,147 INFO L85 PathProgramCache]: Analyzing trace with hash 640525636, now seen corresponding path program 3 times [2024-06-04 14:27:16,147 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:27:16,147 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [419331588] [2024-06-04 14:27:16,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:27:16,147 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:27:16,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:27:16,349 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:27:16,349 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:27:16,350 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [419331588] [2024-06-04 14:27:16,350 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [419331588] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:27:16,350 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:27:16,350 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 14:27:16,350 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [199928300] [2024-06-04 14:27:16,350 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:27:16,351 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 14:27:16,351 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:27:16,351 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 14:27:16,352 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2024-06-04 14:27:16,409 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 52 [2024-06-04 14:27:16,410 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 201 places, 318 transitions, 3930 flow. Second operand has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:27:16,410 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:27:16,410 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 52 [2024-06-04 14:27:16,410 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:27:18,027 INFO L124 PetriNetUnfolderBase]: 8250/12064 cut-off events. [2024-06-04 14:27:18,027 INFO L125 PetriNetUnfolderBase]: For 547545/547589 co-relation queries the response was YES. [2024-06-04 14:27:18,123 INFO L83 FinitePrefix]: Finished finitePrefix Result has 84611 conditions, 12064 events. 8250/12064 cut-off events. For 547545/547589 co-relation queries the response was YES. Maximal size of possible extension queue 463. Compared 71138 event pairs, 2602 based on Foata normal form. 35/12092 useless extension candidates. Maximal degree in co-relation 84510. Up to 11003 conditions per place. [2024-06-04 14:27:18,180 INFO L140 encePairwiseOnDemand]: 41/52 looper letters, 272 selfloop transitions, 79 changer transitions 0/359 dead transitions. [2024-06-04 14:27:18,180 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 207 places, 359 transitions, 5074 flow [2024-06-04 14:27:18,181 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 14:27:18,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 14:27:18,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 212 transitions. [2024-06-04 14:27:18,181 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5824175824175825 [2024-06-04 14:27:18,181 INFO L175 Difference]: Start difference. First operand has 201 places, 318 transitions, 3930 flow. Second operand 7 states and 212 transitions. [2024-06-04 14:27:18,182 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 207 places, 359 transitions, 5074 flow [2024-06-04 14:27:19,514 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 205 places, 359 transitions, 4933 flow, removed 28 selfloop flow, removed 2 redundant places. [2024-06-04 14:27:19,518 INFO L231 Difference]: Finished difference. Result has 206 places, 318 transitions, 3956 flow [2024-06-04 14:27:19,519 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=3789, PETRI_DIFFERENCE_MINUEND_PLACES=199, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=318, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=79, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=239, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3956, PETRI_PLACES=206, PETRI_TRANSITIONS=318} [2024-06-04 14:27:19,519 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 151 predicate places. [2024-06-04 14:27:19,519 INFO L495 AbstractCegarLoop]: Abstraction has has 206 places, 318 transitions, 3956 flow [2024-06-04 14:27:19,520 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:27:19,520 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:27:19,520 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:27:19,520 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2024-06-04 14:27:19,520 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)] === [2024-06-04 14:27:19,520 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:27:19,520 INFO L85 PathProgramCache]: Analyzing trace with hash 640525450, now seen corresponding path program 3 times [2024-06-04 14:27:19,521 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:27:19,521 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1333545373] [2024-06-04 14:27:19,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:27:19,521 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:27:19,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:27:19,731 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:27:19,731 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:27:19,731 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1333545373] [2024-06-04 14:27:19,731 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1333545373] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:27:19,731 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:27:19,731 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 14:27:19,731 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1373251091] [2024-06-04 14:27:19,731 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:27:19,731 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 14:27:19,732 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:27:19,732 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 14:27:19,732 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-04 14:27:19,824 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 52 [2024-06-04 14:27:19,824 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 206 places, 318 transitions, 3956 flow. Second operand has 8 states, 8 states have (on average 19.125) internal successors, (153), 8 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:27:19,825 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:27:19,825 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 52 [2024-06-04 14:27:19,825 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:27:21,457 INFO L124 PetriNetUnfolderBase]: 7893/11625 cut-off events. [2024-06-04 14:27:21,457 INFO L125 PetriNetUnfolderBase]: For 634160/635410 co-relation queries the response was YES. [2024-06-04 14:27:21,545 INFO L83 FinitePrefix]: Finished finitePrefix Result has 86447 conditions, 11625 events. 7893/11625 cut-off events. For 634160/635410 co-relation queries the response was YES. Maximal size of possible extension queue 478. Compared 70008 event pairs, 2277 based on Foata normal form. 71/11323 useless extension candidates. Maximal degree in co-relation 86345. Up to 10372 conditions per place. [2024-06-04 14:27:21,602 INFO L140 encePairwiseOnDemand]: 41/52 looper letters, 229 selfloop transitions, 108 changer transitions 0/376 dead transitions. [2024-06-04 14:27:21,602 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 213 places, 376 transitions, 5158 flow [2024-06-04 14:27:21,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 14:27:21,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 14:27:21,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 237 transitions. [2024-06-04 14:27:21,603 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5697115384615384 [2024-06-04 14:27:21,603 INFO L175 Difference]: Start difference. First operand has 206 places, 318 transitions, 3956 flow. Second operand 8 states and 237 transitions. [2024-06-04 14:27:21,604 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 213 places, 376 transitions, 5158 flow [2024-06-04 14:27:22,622 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 210 places, 376 transitions, 5025 flow, removed 7 selfloop flow, removed 3 redundant places. [2024-06-04 14:27:22,626 INFO L231 Difference]: Finished difference. Result has 213 places, 338 transitions, 4375 flow [2024-06-04 14:27:22,626 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=3823, PETRI_DIFFERENCE_MINUEND_PLACES=203, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=318, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=88, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=221, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4375, PETRI_PLACES=213, PETRI_TRANSITIONS=338} [2024-06-04 14:27:22,627 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 158 predicate places. [2024-06-04 14:27:22,627 INFO L495 AbstractCegarLoop]: Abstraction has has 213 places, 338 transitions, 4375 flow [2024-06-04 14:27:22,627 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 19.125) internal successors, (153), 8 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:27:22,627 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:27:22,627 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:27:22,627 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2024-06-04 14:27:22,627 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)] === [2024-06-04 14:27:22,628 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:27:22,628 INFO L85 PathProgramCache]: Analyzing trace with hash -44174910, now seen corresponding path program 4 times [2024-06-04 14:27:22,628 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:27:22,628 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1662093583] [2024-06-04 14:27:22,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:27:22,628 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:27:22,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:27:22,844 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:27:22,845 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:27:22,845 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1662093583] [2024-06-04 14:27:22,845 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1662093583] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:27:22,845 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:27:22,845 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 14:27:22,845 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1707718823] [2024-06-04 14:27:22,845 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:27:22,846 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 14:27:22,846 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:27:22,846 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 14:27:22,846 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-04 14:27:22,890 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 52 [2024-06-04 14:27:22,890 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 213 places, 338 transitions, 4375 flow. Second operand has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:27:22,890 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:27:22,890 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 52 [2024-06-04 14:27:22,890 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:27:24,648 INFO L124 PetriNetUnfolderBase]: 8426/12328 cut-off events. [2024-06-04 14:27:24,649 INFO L125 PetriNetUnfolderBase]: For 613585/613612 co-relation queries the response was YES. [2024-06-04 14:27:24,725 INFO L83 FinitePrefix]: Finished finitePrefix Result has 87539 conditions, 12328 events. 8426/12328 cut-off events. For 613585/613612 co-relation queries the response was YES. Maximal size of possible extension queue 484. Compared 72883 event pairs, 2565 based on Foata normal form. 34/12357 useless extension candidates. Maximal degree in co-relation 87434. Up to 11312 conditions per place. [2024-06-04 14:27:24,779 INFO L140 encePairwiseOnDemand]: 43/52 looper letters, 332 selfloop transitions, 35 changer transitions 0/375 dead transitions. [2024-06-04 14:27:24,779 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 218 places, 375 transitions, 5248 flow [2024-06-04 14:27:24,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-04 14:27:24,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-04 14:27:24,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 181 transitions. [2024-06-04 14:27:24,780 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5801282051282052 [2024-06-04 14:27:24,781 INFO L175 Difference]: Start difference. First operand has 213 places, 338 transitions, 4375 flow. Second operand 6 states and 181 transitions. [2024-06-04 14:27:24,781 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 218 places, 375 transitions, 5248 flow [2024-06-04 14:27:25,999 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 215 places, 375 transitions, 5041 flow, removed 41 selfloop flow, removed 3 redundant places. [2024-06-04 14:27:26,003 INFO L231 Difference]: Finished difference. Result has 216 places, 340 transitions, 4278 flow [2024-06-04 14:27:26,004 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=4168, PETRI_DIFFERENCE_MINUEND_PLACES=210, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=338, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=303, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=4278, PETRI_PLACES=216, PETRI_TRANSITIONS=340} [2024-06-04 14:27:26,004 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 161 predicate places. [2024-06-04 14:27:26,004 INFO L495 AbstractCegarLoop]: Abstraction has has 216 places, 340 transitions, 4278 flow [2024-06-04 14:27:26,004 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:27:26,004 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:27:26,005 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:27:26,005 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2024-06-04 14:27:26,005 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)] === [2024-06-04 14:27:26,005 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:27:26,005 INFO L85 PathProgramCache]: Analyzing trace with hash -44501340, now seen corresponding path program 5 times [2024-06-04 14:27:26,005 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:27:26,005 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [601814563] [2024-06-04 14:27:26,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:27:26,006 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:27:26,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:27:26,214 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:27:26,214 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:27:26,214 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [601814563] [2024-06-04 14:27:26,215 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [601814563] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:27:26,215 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:27:26,215 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 14:27:26,215 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [277966163] [2024-06-04 14:27:26,215 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:27:26,215 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 14:27:26,215 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:27:26,216 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 14:27:26,216 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-04 14:27:26,267 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 52 [2024-06-04 14:27:26,268 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 216 places, 340 transitions, 4278 flow. Second operand has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:27:26,268 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:27:26,268 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 52 [2024-06-04 14:27:26,268 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:27:27,876 INFO L124 PetriNetUnfolderBase]: 8497/12429 cut-off events. [2024-06-04 14:27:27,876 INFO L125 PetriNetUnfolderBase]: For 637327/637354 co-relation queries the response was YES. [2024-06-04 14:27:27,977 INFO L83 FinitePrefix]: Finished finitePrefix Result has 88616 conditions, 12429 events. 8497/12429 cut-off events. For 637327/637354 co-relation queries the response was YES. Maximal size of possible extension queue 490. Compared 73505 event pairs, 2087 based on Foata normal form. 30/12454 useless extension candidates. Maximal degree in co-relation 88511. Up to 10977 conditions per place. [2024-06-04 14:27:28,037 INFO L140 encePairwiseOnDemand]: 43/52 looper letters, 328 selfloop transitions, 50 changer transitions 0/386 dead transitions. [2024-06-04 14:27:28,037 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 221 places, 386 transitions, 5384 flow [2024-06-04 14:27:28,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-04 14:27:28,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-04 14:27:28,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 189 transitions. [2024-06-04 14:27:28,038 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6057692307692307 [2024-06-04 14:27:28,038 INFO L175 Difference]: Start difference. First operand has 216 places, 340 transitions, 4278 flow. Second operand 6 states and 189 transitions. [2024-06-04 14:27:28,038 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 221 places, 386 transitions, 5384 flow [2024-06-04 14:27:29,334 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 217 places, 386 transitions, 5318 flow, removed 2 selfloop flow, removed 4 redundant places. [2024-06-04 14:27:29,338 INFO L231 Difference]: Finished difference. Result has 219 places, 343 transitions, 4390 flow [2024-06-04 14:27:29,339 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=4212, PETRI_DIFFERENCE_MINUEND_PLACES=212, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=340, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=292, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=4390, PETRI_PLACES=219, PETRI_TRANSITIONS=343} [2024-06-04 14:27:29,340 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 164 predicate places. [2024-06-04 14:27:29,340 INFO L495 AbstractCegarLoop]: Abstraction has has 219 places, 343 transitions, 4390 flow [2024-06-04 14:27:29,341 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:27:29,341 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:27:29,341 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:27:29,341 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2024-06-04 14:27:29,341 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)] === [2024-06-04 14:27:29,341 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:27:29,341 INFO L85 PathProgramCache]: Analyzing trace with hash -33450150, now seen corresponding path program 6 times [2024-06-04 14:27:29,342 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:27:29,342 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1797605634] [2024-06-04 14:27:29,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:27:29,342 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:27:29,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:27:29,540 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:27:29,541 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:27:29,541 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1797605634] [2024-06-04 14:27:29,541 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1797605634] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:27:29,541 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:27:29,541 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 14:27:29,541 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1253948153] [2024-06-04 14:27:29,542 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:27:29,542 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 14:27:29,542 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:27:29,542 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 14:27:29,542 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-04 14:27:29,590 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 52 [2024-06-04 14:27:29,591 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 219 places, 343 transitions, 4390 flow. Second operand has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:27:29,591 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:27:29,591 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 52 [2024-06-04 14:27:29,591 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:27:31,413 INFO L124 PetriNetUnfolderBase]: 8453/12366 cut-off events. [2024-06-04 14:27:31,413 INFO L125 PetriNetUnfolderBase]: For 655158/655160 co-relation queries the response was YES. [2024-06-04 14:27:31,494 INFO L83 FinitePrefix]: Finished finitePrefix Result has 88840 conditions, 12366 events. 8453/12366 cut-off events. For 655158/655160 co-relation queries the response was YES. Maximal size of possible extension queue 486. Compared 73181 event pairs, 2577 based on Foata normal form. 18/12377 useless extension candidates. Maximal degree in co-relation 88733. Up to 11445 conditions per place. [2024-06-04 14:27:31,549 INFO L140 encePairwiseOnDemand]: 43/52 looper letters, 332 selfloop transitions, 33 changer transitions 0/373 dead transitions. [2024-06-04 14:27:31,549 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 224 places, 373 transitions, 5237 flow [2024-06-04 14:27:31,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-04 14:27:31,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-04 14:27:31,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 175 transitions. [2024-06-04 14:27:31,552 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5608974358974359 [2024-06-04 14:27:31,552 INFO L175 Difference]: Start difference. First operand has 219 places, 343 transitions, 4390 flow. Second operand 6 states and 175 transitions. [2024-06-04 14:27:31,552 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 224 places, 373 transitions, 5237 flow [2024-06-04 14:27:32,686 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 219 places, 373 transitions, 5135 flow, removed 14 selfloop flow, removed 5 redundant places. [2024-06-04 14:27:32,690 INFO L231 Difference]: Finished difference. Result has 220 places, 344 transitions, 4382 flow [2024-06-04 14:27:32,690 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=4291, PETRI_DIFFERENCE_MINUEND_PLACES=214, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=343, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=310, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=4382, PETRI_PLACES=220, PETRI_TRANSITIONS=344} [2024-06-04 14:27:32,691 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 165 predicate places. [2024-06-04 14:27:32,691 INFO L495 AbstractCegarLoop]: Abstraction has has 220 places, 344 transitions, 4382 flow [2024-06-04 14:27:32,691 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:27:32,691 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:27:32,691 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:27:32,691 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2024-06-04 14:27:32,691 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)] === [2024-06-04 14:27:32,692 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:27:32,692 INFO L85 PathProgramCache]: Analyzing trace with hash -1957468184, now seen corresponding path program 4 times [2024-06-04 14:27:32,692 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:27:32,692 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [576974507] [2024-06-04 14:27:32,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:27:32,692 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:27:32,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:27:32,878 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:27:32,879 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:27:32,879 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [576974507] [2024-06-04 14:27:32,879 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [576974507] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:27:32,879 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:27:32,879 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 14:27:32,879 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [600456795] [2024-06-04 14:27:32,880 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:27:32,880 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 14:27:32,880 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:27:32,880 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 14:27:32,880 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-04 14:27:32,959 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 52 [2024-06-04 14:27:32,960 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 220 places, 344 transitions, 4382 flow. Second operand has 8 states, 8 states have (on average 19.125) internal successors, (153), 8 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:27:32,960 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:27:32,960 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 52 [2024-06-04 14:27:32,960 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:27:34,547 INFO L124 PetriNetUnfolderBase]: 8051/11860 cut-off events. [2024-06-04 14:27:34,547 INFO L125 PetriNetUnfolderBase]: For 681776/683116 co-relation queries the response was YES. [2024-06-04 14:27:34,639 INFO L83 FinitePrefix]: Finished finitePrefix Result has 88871 conditions, 11860 events. 8051/11860 cut-off events. For 681776/683116 co-relation queries the response was YES. Maximal size of possible extension queue 485. Compared 71532 event pairs, 2317 based on Foata normal form. 115/11581 useless extension candidates. Maximal degree in co-relation 88765. Up to 10471 conditions per place. [2024-06-04 14:27:34,697 INFO L140 encePairwiseOnDemand]: 41/52 looper letters, 242 selfloop transitions, 104 changer transitions 0/388 dead transitions. [2024-06-04 14:27:34,698 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 225 places, 388 transitions, 5646 flow [2024-06-04 14:27:34,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-04 14:27:34,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-04 14:27:34,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 194 transitions. [2024-06-04 14:27:34,699 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6217948717948718 [2024-06-04 14:27:34,699 INFO L175 Difference]: Start difference. First operand has 220 places, 344 transitions, 4382 flow. Second operand 6 states and 194 transitions. [2024-06-04 14:27:34,699 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 225 places, 388 transitions, 5646 flow [2024-06-04 14:27:35,892 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 221 places, 388 transitions, 5574 flow, removed 5 selfloop flow, removed 4 redundant places. [2024-06-04 14:27:35,897 INFO L231 Difference]: Finished difference. Result has 222 places, 352 transitions, 4667 flow [2024-06-04 14:27:35,897 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=4310, PETRI_DIFFERENCE_MINUEND_PLACES=216, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=344, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=96, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=248, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=4667, PETRI_PLACES=222, PETRI_TRANSITIONS=352} [2024-06-04 14:27:35,897 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 167 predicate places. [2024-06-04 14:27:35,898 INFO L495 AbstractCegarLoop]: Abstraction has has 222 places, 352 transitions, 4667 flow [2024-06-04 14:27:35,898 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 19.125) internal successors, (153), 8 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:27:35,898 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:27:35,898 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:27:35,898 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2024-06-04 14:27:35,898 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)] === [2024-06-04 14:27:35,898 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:27:35,899 INFO L85 PathProgramCache]: Analyzing trace with hash -368910168, now seen corresponding path program 5 times [2024-06-04 14:27:35,899 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:27:35,899 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1584561946] [2024-06-04 14:27:35,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:27:35,899 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:27:35,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:27:36,150 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:27:36,150 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:27:36,150 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1584561946] [2024-06-04 14:27:36,150 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1584561946] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:27:36,150 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:27:36,151 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 14:27:36,151 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [241044008] [2024-06-04 14:27:36,151 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:27:36,151 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 14:27:36,151 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:27:36,152 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 14:27:36,152 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-04 14:27:36,218 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 52 [2024-06-04 14:27:36,219 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 222 places, 352 transitions, 4667 flow. Second operand has 8 states, 8 states have (on average 19.125) internal successors, (153), 8 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:27:36,219 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:27:36,219 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 52 [2024-06-04 14:27:36,219 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:27:38,089 INFO L124 PetriNetUnfolderBase]: 8051/11864 cut-off events. [2024-06-04 14:27:38,090 INFO L125 PetriNetUnfolderBase]: For 709896/711310 co-relation queries the response was YES. [2024-06-04 14:27:38,181 INFO L83 FinitePrefix]: Finished finitePrefix Result has 89540 conditions, 11864 events. 8051/11864 cut-off events. For 709896/711310 co-relation queries the response was YES. Maximal size of possible extension queue 486. Compared 71570 event pairs, 2286 based on Foata normal form. 96/11587 useless extension candidates. Maximal degree in co-relation 89433. Up to 10665 conditions per place. [2024-06-04 14:27:38,242 INFO L140 encePairwiseOnDemand]: 41/52 looper letters, 261 selfloop transitions, 77 changer transitions 0/380 dead transitions. [2024-06-04 14:27:38,242 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 227 places, 380 transitions, 5415 flow [2024-06-04 14:27:38,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-04 14:27:38,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-04 14:27:38,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 185 transitions. [2024-06-04 14:27:38,243 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.592948717948718 [2024-06-04 14:27:38,243 INFO L175 Difference]: Start difference. First operand has 222 places, 352 transitions, 4667 flow. Second operand 6 states and 185 transitions. [2024-06-04 14:27:38,243 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 227 places, 380 transitions, 5415 flow [2024-06-04 14:27:39,779 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 224 places, 380 transitions, 5129 flow, removed 46 selfloop flow, removed 3 redundant places. [2024-06-04 14:27:39,783 INFO L231 Difference]: Finished difference. Result has 225 places, 352 transitions, 4545 flow [2024-06-04 14:27:39,783 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=4381, PETRI_DIFFERENCE_MINUEND_PLACES=219, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=352, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=77, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=275, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=4545, PETRI_PLACES=225, PETRI_TRANSITIONS=352} [2024-06-04 14:27:39,784 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 170 predicate places. [2024-06-04 14:27:39,784 INFO L495 AbstractCegarLoop]: Abstraction has has 225 places, 352 transitions, 4545 flow [2024-06-04 14:27:39,784 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 19.125) internal successors, (153), 8 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:27:39,784 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:27:39,784 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:27:39,784 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2024-06-04 14:27:39,785 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)] === [2024-06-04 14:27:39,785 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:27:39,785 INFO L85 PathProgramCache]: Analyzing trace with hash -368909982, now seen corresponding path program 4 times [2024-06-04 14:27:39,785 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:27:39,785 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [884755872] [2024-06-04 14:27:39,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:27:39,785 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:27:39,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:27:39,974 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:27:39,975 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:27:39,975 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [884755872] [2024-06-04 14:27:39,975 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [884755872] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:27:39,975 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:27:39,975 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 14:27:39,975 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1448709084] [2024-06-04 14:27:39,975 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:27:39,975 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 14:27:39,976 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:27:39,976 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 14:27:39,976 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-04 14:27:40,024 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 52 [2024-06-04 14:27:40,025 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 225 places, 352 transitions, 4545 flow. Second operand has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:27:40,025 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:27:40,025 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 52 [2024-06-04 14:27:40,025 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:27:41,979 INFO L124 PetriNetUnfolderBase]: 8492/12420 cut-off events. [2024-06-04 14:27:41,979 INFO L125 PetriNetUnfolderBase]: For 665119/665163 co-relation queries the response was YES. [2024-06-04 14:27:42,058 INFO L83 FinitePrefix]: Finished finitePrefix Result has 89127 conditions, 12420 events. 8492/12420 cut-off events. For 665119/665163 co-relation queries the response was YES. Maximal size of possible extension queue 487. Compared 73543 event pairs, 2614 based on Foata normal form. 35/12448 useless extension candidates. Maximal degree in co-relation 89019. Up to 11426 conditions per place. [2024-06-04 14:27:42,118 INFO L140 encePairwiseOnDemand]: 41/52 looper letters, 321 selfloop transitions, 57 changer transitions 0/386 dead transitions. [2024-06-04 14:27:42,118 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 230 places, 386 transitions, 5583 flow [2024-06-04 14:27:42,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-04 14:27:42,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-04 14:27:42,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 185 transitions. [2024-06-04 14:27:42,119 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.592948717948718 [2024-06-04 14:27:42,119 INFO L175 Difference]: Start difference. First operand has 225 places, 352 transitions, 4545 flow. Second operand 6 states and 185 transitions. [2024-06-04 14:27:42,119 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 230 places, 386 transitions, 5583 flow [2024-06-04 14:27:43,374 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 224 places, 386 transitions, 5359 flow, removed 8 selfloop flow, removed 6 redundant places. [2024-06-04 14:27:43,378 INFO L231 Difference]: Finished difference. Result has 225 places, 352 transitions, 4451 flow [2024-06-04 14:27:43,378 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=4323, PETRI_DIFFERENCE_MINUEND_PLACES=219, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=352, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=57, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=295, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=4451, PETRI_PLACES=225, PETRI_TRANSITIONS=352} [2024-06-04 14:27:43,379 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 170 predicate places. [2024-06-04 14:27:43,379 INFO L495 AbstractCegarLoop]: Abstraction has has 225 places, 352 transitions, 4451 flow [2024-06-04 14:27:43,379 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:27:43,379 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:27:43,379 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:27:43,379 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2024-06-04 14:27:43,379 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)] === [2024-06-04 14:27:43,380 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:27:43,380 INFO L85 PathProgramCache]: Analyzing trace with hash -363667758, now seen corresponding path program 6 times [2024-06-04 14:27:43,380 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:27:43,380 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1796055798] [2024-06-04 14:27:43,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:27:43,380 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:27:43,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:27:43,568 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:27:43,569 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:27:43,569 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1796055798] [2024-06-04 14:27:43,569 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1796055798] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:27:43,569 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:27:43,569 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 14:27:43,569 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [519833548] [2024-06-04 14:27:43,569 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:27:43,570 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 14:27:43,570 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:27:43,570 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 14:27:43,570 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-04 14:27:43,625 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 52 [2024-06-04 14:27:43,626 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 225 places, 352 transitions, 4451 flow. Second operand has 8 states, 8 states have (on average 19.125) internal successors, (153), 8 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:27:43,626 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:27:43,626 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 52 [2024-06-04 14:27:43,626 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:27:45,250 INFO L124 PetriNetUnfolderBase]: 8050/11869 cut-off events. [2024-06-04 14:27:45,251 INFO L125 PetriNetUnfolderBase]: For 760615/761977 co-relation queries the response was YES. [2024-06-04 14:27:45,357 INFO L83 FinitePrefix]: Finished finitePrefix Result has 90219 conditions, 11869 events. 8050/11869 cut-off events. For 760615/761977 co-relation queries the response was YES. Maximal size of possible extension queue 485. Compared 71717 event pairs, 2286 based on Foata normal form. 132/11628 useless extension candidates. Maximal degree in co-relation 90111. Up to 10477 conditions per place. [2024-06-04 14:27:45,417 INFO L140 encePairwiseOnDemand]: 41/52 looper letters, 248 selfloop transitions, 116 changer transitions 0/406 dead transitions. [2024-06-04 14:27:45,417 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 232 places, 406 transitions, 5733 flow [2024-06-04 14:27:45,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 14:27:45,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 14:27:45,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 251 transitions. [2024-06-04 14:27:45,418 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6033653846153846 [2024-06-04 14:27:45,418 INFO L175 Difference]: Start difference. First operand has 225 places, 352 transitions, 4451 flow. Second operand 8 states and 251 transitions. [2024-06-04 14:27:45,418 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 232 places, 406 transitions, 5733 flow [2024-06-04 14:27:47,137 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 227 places, 406 transitions, 5583 flow, removed 0 selfloop flow, removed 5 redundant places. [2024-06-04 14:27:47,141 INFO L231 Difference]: Finished difference. Result has 228 places, 356 transitions, 4604 flow [2024-06-04 14:27:47,142 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=4301, PETRI_DIFFERENCE_MINUEND_PLACES=220, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=352, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=112, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=240, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4604, PETRI_PLACES=228, PETRI_TRANSITIONS=356} [2024-06-04 14:27:47,142 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 173 predicate places. [2024-06-04 14:27:47,142 INFO L495 AbstractCegarLoop]: Abstraction has has 228 places, 356 transitions, 4604 flow [2024-06-04 14:27:47,142 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 19.125) internal successors, (153), 8 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:27:47,142 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:27:47,143 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:27:47,143 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2024-06-04 14:27:47,143 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)] === [2024-06-04 14:27:47,143 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:27:47,143 INFO L85 PathProgramCache]: Analyzing trace with hash -363369228, now seen corresponding path program 7 times [2024-06-04 14:27:47,143 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:27:47,143 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1266430458] [2024-06-04 14:27:47,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:27:47,144 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:27:47,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:27:47,332 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:27:47,332 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:27:47,332 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1266430458] [2024-06-04 14:27:47,333 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1266430458] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:27:47,333 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:27:47,333 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 14:27:47,333 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1558982666] [2024-06-04 14:27:47,333 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:27:47,333 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 14:27:47,333 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:27:47,334 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 14:27:47,334 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-04 14:27:47,407 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 52 [2024-06-04 14:27:47,407 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 228 places, 356 transitions, 4604 flow. Second operand has 8 states, 8 states have (on average 19.125) internal successors, (153), 8 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:27:47,407 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:27:47,407 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 52 [2024-06-04 14:27:47,407 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:27:49,157 INFO L124 PetriNetUnfolderBase]: 8080/11913 cut-off events. [2024-06-04 14:27:49,158 INFO L125 PetriNetUnfolderBase]: For 792289/793698 co-relation queries the response was YES. [2024-06-04 14:27:49,248 INFO L83 FinitePrefix]: Finished finitePrefix Result has 91443 conditions, 11913 events. 8080/11913 cut-off events. For 792289/793698 co-relation queries the response was YES. Maximal size of possible extension queue 487. Compared 71964 event pairs, 2285 based on Foata normal form. 187/11727 useless extension candidates. Maximal degree in co-relation 91334. Up to 10509 conditions per place. [2024-06-04 14:27:49,305 INFO L140 encePairwiseOnDemand]: 41/52 looper letters, 245 selfloop transitions, 123 changer transitions 0/410 dead transitions. [2024-06-04 14:27:49,306 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 236 places, 410 transitions, 5726 flow [2024-06-04 14:27:49,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 14:27:49,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 14:27:49,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 271 transitions. [2024-06-04 14:27:49,307 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5790598290598291 [2024-06-04 14:27:49,307 INFO L175 Difference]: Start difference. First operand has 228 places, 356 transitions, 4604 flow. Second operand 9 states and 271 transitions. [2024-06-04 14:27:49,307 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 236 places, 410 transitions, 5726 flow [2024-06-04 14:27:51,559 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 230 places, 410 transitions, 5381 flow, removed 31 selfloop flow, removed 6 redundant places. [2024-06-04 14:27:51,572 INFO L231 Difference]: Finished difference. Result has 231 places, 360 transitions, 4585 flow [2024-06-04 14:27:51,573 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=4277, PETRI_DIFFERENCE_MINUEND_PLACES=222, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=356, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=119, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=237, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4585, PETRI_PLACES=231, PETRI_TRANSITIONS=360} [2024-06-04 14:27:51,573 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 176 predicate places. [2024-06-04 14:27:51,573 INFO L495 AbstractCegarLoop]: Abstraction has has 231 places, 360 transitions, 4585 flow [2024-06-04 14:27:51,574 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 19.125) internal successors, (153), 8 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:27:51,574 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:27:51,574 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:27:51,574 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2024-06-04 14:27:51,574 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)] === [2024-06-04 14:27:51,575 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:27:51,575 INFO L85 PathProgramCache]: Analyzing trace with hash 613616418, now seen corresponding path program 5 times [2024-06-04 14:27:51,575 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:27:51,575 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [254975937] [2024-06-04 14:27:51,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:27:51,575 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:27:51,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:27:51,797 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:27:51,797 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:27:51,798 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [254975937] [2024-06-04 14:27:51,798 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [254975937] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:27:51,798 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:27:51,798 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 14:27:51,798 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1510500093] [2024-06-04 14:27:51,798 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:27:51,799 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 14:27:51,799 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:27:51,802 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 14:27:51,802 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-04 14:27:51,885 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 52 [2024-06-04 14:27:51,885 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 231 places, 360 transitions, 4585 flow. Second operand has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:27:51,885 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:27:51,885 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 52 [2024-06-04 14:27:51,886 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:27:53,607 INFO L124 PetriNetUnfolderBase]: 8554/12518 cut-off events. [2024-06-04 14:27:53,607 INFO L125 PetriNetUnfolderBase]: For 746077/746121 co-relation queries the response was YES. [2024-06-04 14:27:53,722 INFO L83 FinitePrefix]: Finished finitePrefix Result has 91580 conditions, 12518 events. 8554/12518 cut-off events. For 746077/746121 co-relation queries the response was YES. Maximal size of possible extension queue 495. Compared 74252 event pairs, 2613 based on Foata normal form. 35/12546 useless extension candidates. Maximal degree in co-relation 91470. Up to 11503 conditions per place. [2024-06-04 14:27:53,786 INFO L140 encePairwiseOnDemand]: 42/52 looper letters, 325 selfloop transitions, 61 changer transitions 0/394 dead transitions. [2024-06-04 14:27:53,787 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 235 places, 394 transitions, 5700 flow [2024-06-04 14:27:53,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-04 14:27:53,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-04 14:27:53,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 160 transitions. [2024-06-04 14:27:53,788 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6153846153846154 [2024-06-04 14:27:53,788 INFO L175 Difference]: Start difference. First operand has 231 places, 360 transitions, 4585 flow. Second operand 5 states and 160 transitions. [2024-06-04 14:27:53,788 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 235 places, 394 transitions, 5700 flow [2024-06-04 14:27:55,757 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 229 places, 394 transitions, 5456 flow, removed 16 selfloop flow, removed 6 redundant places. [2024-06-04 14:27:55,761 INFO L231 Difference]: Finished difference. Result has 231 places, 365 transitions, 4594 flow [2024-06-04 14:27:55,762 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=4343, PETRI_DIFFERENCE_MINUEND_PLACES=225, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=360, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=56, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=303, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=4594, PETRI_PLACES=231, PETRI_TRANSITIONS=365} [2024-06-04 14:27:55,762 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 176 predicate places. [2024-06-04 14:27:55,762 INFO L495 AbstractCegarLoop]: Abstraction has has 231 places, 365 transitions, 4594 flow [2024-06-04 14:27:55,762 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:27:55,762 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:27:55,762 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:27:55,762 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2024-06-04 14:27:55,763 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)] === [2024-06-04 14:27:55,763 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:27:55,763 INFO L85 PathProgramCache]: Analyzing trace with hash 613627578, now seen corresponding path program 6 times [2024-06-04 14:27:55,763 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:27:55,763 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [763676914] [2024-06-04 14:27:55,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:27:55,763 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:27:55,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:27:55,961 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:27:55,961 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:27:55,962 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [763676914] [2024-06-04 14:27:55,962 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [763676914] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:27:55,962 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:27:55,962 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 14:27:55,962 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1664529472] [2024-06-04 14:27:55,962 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:27:55,962 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 14:27:55,963 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:27:55,963 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 14:27:55,963 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-04 14:27:56,024 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 52 [2024-06-04 14:27:56,024 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 231 places, 365 transitions, 4594 flow. Second operand has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:27:56,024 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:27:56,024 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 52 [2024-06-04 14:27:56,024 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:27:57,759 INFO L124 PetriNetUnfolderBase]: 8547/12510 cut-off events. [2024-06-04 14:27:57,760 INFO L125 PetriNetUnfolderBase]: For 771991/772035 co-relation queries the response was YES. [2024-06-04 14:27:57,863 INFO L83 FinitePrefix]: Finished finitePrefix Result has 91934 conditions, 12510 events. 8547/12510 cut-off events. For 771991/772035 co-relation queries the response was YES. Maximal size of possible extension queue 495. Compared 74112 event pairs, 2597 based on Foata normal form. 37/12541 useless extension candidates. Maximal degree in co-relation 91822. Up to 11496 conditions per place. [2024-06-04 14:27:57,923 INFO L140 encePairwiseOnDemand]: 42/52 looper letters, 327 selfloop transitions, 66 changer transitions 0/401 dead transitions. [2024-06-04 14:27:57,924 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 237 places, 401 transitions, 5493 flow [2024-06-04 14:27:57,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 14:27:57,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 14:27:57,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 207 transitions. [2024-06-04 14:27:57,925 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5686813186813187 [2024-06-04 14:27:57,925 INFO L175 Difference]: Start difference. First operand has 231 places, 365 transitions, 4594 flow. Second operand 7 states and 207 transitions. [2024-06-04 14:27:57,925 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 237 places, 401 transitions, 5493 flow [2024-06-04 14:27:59,915 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 233 places, 401 transitions, 5357 flow, removed 23 selfloop flow, removed 4 redundant places. [2024-06-04 14:27:59,920 INFO L231 Difference]: Finished difference. Result has 234 places, 366 transitions, 4620 flow [2024-06-04 14:27:59,920 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=4461, PETRI_DIFFERENCE_MINUEND_PLACES=227, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=365, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=65, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=300, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4620, PETRI_PLACES=234, PETRI_TRANSITIONS=366} [2024-06-04 14:27:59,920 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 179 predicate places. [2024-06-04 14:27:59,921 INFO L495 AbstractCegarLoop]: Abstraction has has 234 places, 366 transitions, 4620 flow [2024-06-04 14:27:59,921 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:27:59,921 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:27:59,921 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:27:59,921 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2024-06-04 14:27:59,921 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)] === [2024-06-04 14:27:59,921 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:27:59,922 INFO L85 PathProgramCache]: Analyzing trace with hash 613616232, now seen corresponding path program 8 times [2024-06-04 14:27:59,922 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:27:59,922 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [876680015] [2024-06-04 14:27:59,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:27:59,922 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:27:59,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:28:00,121 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:28:00,121 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:28:00,121 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [876680015] [2024-06-04 14:28:00,122 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [876680015] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:28:00,122 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:28:00,122 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 14:28:00,122 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [890202371] [2024-06-04 14:28:00,122 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:28:00,122 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 14:28:00,123 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:28:00,123 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 14:28:00,123 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-04 14:28:00,187 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 52 [2024-06-04 14:28:00,188 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 234 places, 366 transitions, 4620 flow. Second operand has 8 states, 8 states have (on average 19.125) internal successors, (153), 8 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:28:00,188 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:28:00,188 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 52 [2024-06-04 14:28:00,188 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:28:02,013 INFO L124 PetriNetUnfolderBase]: 8080/11923 cut-off events. [2024-06-04 14:28:02,013 INFO L125 PetriNetUnfolderBase]: For 814433/815818 co-relation queries the response was YES. [2024-06-04 14:28:02,090 INFO L83 FinitePrefix]: Finished finitePrefix Result has 91635 conditions, 11923 events. 8080/11923 cut-off events. For 814433/815818 co-relation queries the response was YES. Maximal size of possible extension queue 486. Compared 72179 event pairs, 2284 based on Foata normal form. 128/11678 useless extension candidates. Maximal degree in co-relation 91524. Up to 10568 conditions per place. [2024-06-04 14:28:02,145 INFO L140 encePairwiseOnDemand]: 41/52 looper letters, 261 selfloop transitions, 105 changer transitions 0/410 dead transitions. [2024-06-04 14:28:02,146 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 240 places, 410 transitions, 5656 flow [2024-06-04 14:28:02,146 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 14:28:02,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 14:28:02,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 224 transitions. [2024-06-04 14:28:02,147 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6153846153846154 [2024-06-04 14:28:02,147 INFO L175 Difference]: Start difference. First operand has 234 places, 366 transitions, 4620 flow. Second operand 7 states and 224 transitions. [2024-06-04 14:28:02,147 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 240 places, 410 transitions, 5656 flow [2024-06-04 14:28:03,874 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 234 places, 410 transitions, 5475 flow, removed 22 selfloop flow, removed 6 redundant places. [2024-06-04 14:28:03,879 INFO L231 Difference]: Finished difference. Result has 235 places, 366 transitions, 4675 flow [2024-06-04 14:28:03,879 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=4443, PETRI_DIFFERENCE_MINUEND_PLACES=228, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=366, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=105, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=261, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4675, PETRI_PLACES=235, PETRI_TRANSITIONS=366} [2024-06-04 14:28:03,879 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 180 predicate places. [2024-06-04 14:28:03,879 INFO L495 AbstractCegarLoop]: Abstraction has has 235 places, 366 transitions, 4675 flow [2024-06-04 14:28:03,880 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 19.125) internal successors, (153), 8 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:28:03,880 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:28:03,880 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:28:03,880 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2024-06-04 14:28:03,880 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)] === [2024-06-04 14:28:03,880 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:28:03,880 INFO L85 PathProgramCache]: Analyzing trace with hash 613621812, now seen corresponding path program 9 times [2024-06-04 14:28:03,880 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:28:03,881 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1103875086] [2024-06-04 14:28:03,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:28:03,881 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:28:03,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:28:04,079 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:28:04,080 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:28:04,080 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1103875086] [2024-06-04 14:28:04,080 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1103875086] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:28:04,080 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:28:04,080 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 14:28:04,080 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [194546821] [2024-06-04 14:28:04,080 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:28:04,081 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 14:28:04,081 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:28:04,081 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 14:28:04,081 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-04 14:28:04,142 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 52 [2024-06-04 14:28:04,143 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 235 places, 366 transitions, 4675 flow. Second operand has 8 states, 8 states have (on average 19.125) internal successors, (153), 8 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:28:04,143 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:28:04,143 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 52 [2024-06-04 14:28:04,143 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:28:05,783 INFO L124 PetriNetUnfolderBase]: 8062/11897 cut-off events. [2024-06-04 14:28:05,783 INFO L125 PetriNetUnfolderBase]: For 809384/810758 co-relation queries the response was YES. [2024-06-04 14:28:05,902 INFO L83 FinitePrefix]: Finished finitePrefix Result has 91387 conditions, 11897 events. 8062/11897 cut-off events. For 809384/810758 co-relation queries the response was YES. Maximal size of possible extension queue 485. Compared 72008 event pairs, 2284 based on Foata normal form. 128/11652 useless extension candidates. Maximal degree in co-relation 91276. Up to 10549 conditions per place. [2024-06-04 14:28:05,969 INFO L140 encePairwiseOnDemand]: 41/52 looper letters, 252 selfloop transitions, 105 changer transitions 0/401 dead transitions. [2024-06-04 14:28:05,970 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 240 places, 401 transitions, 5481 flow [2024-06-04 14:28:05,970 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-04 14:28:05,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-04 14:28:05,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 194 transitions. [2024-06-04 14:28:05,971 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6217948717948718 [2024-06-04 14:28:05,971 INFO L175 Difference]: Start difference. First operand has 235 places, 366 transitions, 4675 flow. Second operand 6 states and 194 transitions. [2024-06-04 14:28:05,971 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 240 places, 401 transitions, 5481 flow [2024-06-04 14:28:07,940 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 231 places, 401 transitions, 5191 flow, removed 16 selfloop flow, removed 9 redundant places. [2024-06-04 14:28:07,944 INFO L231 Difference]: Finished difference. Result has 232 places, 366 transitions, 4611 flow [2024-06-04 14:28:07,945 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=4385, PETRI_DIFFERENCE_MINUEND_PLACES=226, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=366, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=105, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=261, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=4611, PETRI_PLACES=232, PETRI_TRANSITIONS=366} [2024-06-04 14:28:07,945 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 177 predicate places. [2024-06-04 14:28:07,945 INFO L495 AbstractCegarLoop]: Abstraction has has 232 places, 366 transitions, 4611 flow [2024-06-04 14:28:07,945 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 19.125) internal successors, (153), 8 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:28:07,945 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:28:07,945 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:28:07,945 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2024-06-04 14:28:07,946 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)] === [2024-06-04 14:28:07,946 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:28:07,946 INFO L85 PathProgramCache]: Analyzing trace with hash -44171934, now seen corresponding path program 7 times [2024-06-04 14:28:07,946 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:28:07,946 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [253843101] [2024-06-04 14:28:07,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:28:07,946 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:28:07,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:28:08,129 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:28:08,130 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:28:08,130 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [253843101] [2024-06-04 14:28:08,130 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [253843101] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:28:08,130 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:28:08,130 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 14:28:08,130 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [700755252] [2024-06-04 14:28:08,130 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:28:08,131 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 14:28:08,131 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:28:08,131 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 14:28:08,131 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2024-06-04 14:28:08,188 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 52 [2024-06-04 14:28:08,188 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 232 places, 366 transitions, 4611 flow. Second operand has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:28:08,188 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:28:08,188 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 52 [2024-06-04 14:28:08,188 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:28:09,871 INFO L124 PetriNetUnfolderBase]: 8564/12537 cut-off events. [2024-06-04 14:28:09,872 INFO L125 PetriNetUnfolderBase]: For 712412/712456 co-relation queries the response was YES. [2024-06-04 14:28:09,967 INFO L83 FinitePrefix]: Finished finitePrefix Result has 90702 conditions, 12537 events. 8564/12537 cut-off events. For 712412/712456 co-relation queries the response was YES. Maximal size of possible extension queue 498. Compared 74370 event pairs, 2612 based on Foata normal form. 35/12565 useless extension candidates. Maximal degree in co-relation 90592. Up to 11419 conditions per place. [2024-06-04 14:28:10,026 INFO L140 encePairwiseOnDemand]: 42/52 looper letters, 307 selfloop transitions, 95 changer transitions 0/410 dead transitions. [2024-06-04 14:28:10,026 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 237 places, 410 transitions, 5994 flow [2024-06-04 14:28:10,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-04 14:28:10,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-04 14:28:10,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 186 transitions. [2024-06-04 14:28:10,027 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5961538461538461 [2024-06-04 14:28:10,027 INFO L175 Difference]: Start difference. First operand has 232 places, 366 transitions, 4611 flow. Second operand 6 states and 186 transitions. [2024-06-04 14:28:10,027 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 237 places, 410 transitions, 5994 flow [2024-06-04 14:28:11,849 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 231 places, 410 transitions, 5766 flow, removed 6 selfloop flow, removed 6 redundant places. [2024-06-04 14:28:11,854 INFO L231 Difference]: Finished difference. Result has 233 places, 375 transitions, 4756 flow [2024-06-04 14:28:11,854 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=4391, PETRI_DIFFERENCE_MINUEND_PLACES=226, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=366, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=86, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=279, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=4756, PETRI_PLACES=233, PETRI_TRANSITIONS=375} [2024-06-04 14:28:11,854 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 178 predicate places. [2024-06-04 14:28:11,854 INFO L495 AbstractCegarLoop]: Abstraction has has 233 places, 375 transitions, 4756 flow [2024-06-04 14:28:11,854 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:28:11,855 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:28:11,855 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:28:11,855 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2024-06-04 14:28:11,855 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)] === [2024-06-04 14:28:11,855 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:28:11,855 INFO L85 PathProgramCache]: Analyzing trace with hash -44409270, now seen corresponding path program 10 times [2024-06-04 14:28:11,855 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:28:11,856 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1735963990] [2024-06-04 14:28:11,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:28:11,856 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:28:11,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:28:12,045 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:28:12,045 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:28:12,045 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1735963990] [2024-06-04 14:28:12,045 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1735963990] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:28:12,046 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:28:12,046 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 14:28:12,046 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1711876135] [2024-06-04 14:28:12,046 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:28:12,046 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 14:28:12,046 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:28:12,047 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 14:28:12,047 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-04 14:28:12,115 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 52 [2024-06-04 14:28:12,115 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 233 places, 375 transitions, 4756 flow. Second operand has 8 states, 8 states have (on average 19.125) internal successors, (153), 8 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:28:12,115 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:28:12,115 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 52 [2024-06-04 14:28:12,116 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:28:13,852 INFO L124 PetriNetUnfolderBase]: 8092/11941 cut-off events. [2024-06-04 14:28:13,852 INFO L125 PetriNetUnfolderBase]: For 778201/779572 co-relation queries the response was YES. [2024-06-04 14:28:13,975 INFO L83 FinitePrefix]: Finished finitePrefix Result has 91128 conditions, 11941 events. 8092/11941 cut-off events. For 778201/779572 co-relation queries the response was YES. Maximal size of possible extension queue 486. Compared 72325 event pairs, 2283 based on Foata normal form. 151/11719 useless extension candidates. Maximal degree in co-relation 91017. Up to 10484 conditions per place. [2024-06-04 14:28:14,039 INFO L140 encePairwiseOnDemand]: 41/52 looper letters, 231 selfloop transitions, 147 changer transitions 0/424 dead transitions. [2024-06-04 14:28:14,039 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 240 places, 424 transitions, 5640 flow [2024-06-04 14:28:14,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 14:28:14,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 14:28:14,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 251 transitions. [2024-06-04 14:28:14,040 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6033653846153846 [2024-06-04 14:28:14,040 INFO L175 Difference]: Start difference. First operand has 233 places, 375 transitions, 4756 flow. Second operand 8 states and 251 transitions. [2024-06-04 14:28:14,040 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 240 places, 424 transitions, 5640 flow [2024-06-04 14:28:15,708 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 237 places, 424 transitions, 5475 flow, removed 31 selfloop flow, removed 3 redundant places. [2024-06-04 14:28:15,712 INFO L231 Difference]: Finished difference. Result has 238 places, 375 transitions, 4913 flow [2024-06-04 14:28:15,713 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=4591, PETRI_DIFFERENCE_MINUEND_PLACES=230, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=375, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=147, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=228, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4913, PETRI_PLACES=238, PETRI_TRANSITIONS=375} [2024-06-04 14:28:15,713 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 183 predicate places. [2024-06-04 14:28:15,713 INFO L495 AbstractCegarLoop]: Abstraction has has 238 places, 375 transitions, 4913 flow [2024-06-04 14:28:15,713 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 19.125) internal successors, (153), 8 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:28:15,713 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:28:15,713 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:28:15,714 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2024-06-04 14:28:15,714 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)] === [2024-06-04 14:28:15,714 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:28:15,714 INFO L85 PathProgramCache]: Analyzing trace with hash -44409084, now seen corresponding path program 8 times [2024-06-04 14:28:15,714 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:28:15,714 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1287671460] [2024-06-04 14:28:15,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:28:15,715 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:28:15,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:28:15,879 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:28:15,879 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:28:15,879 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1287671460] [2024-06-04 14:28:15,879 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1287671460] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:28:15,879 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:28:15,879 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 14:28:15,879 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [468520121] [2024-06-04 14:28:15,880 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:28:15,880 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 14:28:15,880 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:28:15,880 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 14:28:15,880 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2024-06-04 14:28:15,916 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 52 [2024-06-04 14:28:15,916 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 238 places, 375 transitions, 4913 flow. Second operand has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:28:15,917 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:28:15,917 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 52 [2024-06-04 14:28:15,917 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:28:18,012 INFO L124 PetriNetUnfolderBase]: 8546/12514 cut-off events. [2024-06-04 14:28:18,012 INFO L125 PetriNetUnfolderBase]: For 708568/708612 co-relation queries the response was YES. [2024-06-04 14:28:18,098 INFO L83 FinitePrefix]: Finished finitePrefix Result has 90743 conditions, 12514 events. 8546/12514 cut-off events. For 708568/708612 co-relation queries the response was YES. Maximal size of possible extension queue 498. Compared 74313 event pairs, 2611 based on Foata normal form. 35/12542 useless extension candidates. Maximal degree in co-relation 90632. Up to 11398 conditions per place. [2024-06-04 14:28:18,153 INFO L140 encePairwiseOnDemand]: 42/52 looper letters, 308 selfloop transitions, 95 changer transitions 0/411 dead transitions. [2024-06-04 14:28:18,153 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 243 places, 411 transitions, 6004 flow [2024-06-04 14:28:18,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-04 14:28:18,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-04 14:28:18,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 188 transitions. [2024-06-04 14:28:18,154 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6025641025641025 [2024-06-04 14:28:18,154 INFO L175 Difference]: Start difference. First operand has 238 places, 375 transitions, 4913 flow. Second operand 6 states and 188 transitions. [2024-06-04 14:28:18,155 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 243 places, 411 transitions, 6004 flow [2024-06-04 14:28:19,695 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 235 places, 411 transitions, 5666 flow, removed 19 selfloop flow, removed 8 redundant places. [2024-06-04 14:28:19,699 INFO L231 Difference]: Finished difference. Result has 236 places, 375 transitions, 4796 flow [2024-06-04 14:28:19,700 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=4587, PETRI_DIFFERENCE_MINUEND_PLACES=230, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=375, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=95, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=280, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=4796, PETRI_PLACES=236, PETRI_TRANSITIONS=375} [2024-06-04 14:28:19,700 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 181 predicate places. [2024-06-04 14:28:19,700 INFO L495 AbstractCegarLoop]: Abstraction has has 236 places, 375 transitions, 4796 flow [2024-06-04 14:28:19,700 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:28:19,700 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:28:19,701 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:28:19,701 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2024-06-04 14:28:19,701 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)] === [2024-06-04 14:28:19,703 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:28:19,703 INFO L85 PathProgramCache]: Analyzing trace with hash -33447174, now seen corresponding path program 9 times [2024-06-04 14:28:19,704 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:28:19,704 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [754278720] [2024-06-04 14:28:19,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:28:19,704 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:28:19,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:28:19,894 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:28:19,894 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:28:19,895 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [754278720] [2024-06-04 14:28:19,895 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [754278720] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:28:19,895 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:28:19,895 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 14:28:19,895 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [443925271] [2024-06-04 14:28:19,895 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:28:19,895 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 14:28:19,896 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:28:19,896 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 14:28:19,896 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2024-06-04 14:28:19,941 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 52 [2024-06-04 14:28:19,941 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 236 places, 375 transitions, 4796 flow. Second operand has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:28:19,941 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:28:19,942 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 52 [2024-06-04 14:28:19,942 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:28:22,088 INFO L124 PetriNetUnfolderBase]: 8539/12503 cut-off events. [2024-06-04 14:28:22,088 INFO L125 PetriNetUnfolderBase]: For 654908/654924 co-relation queries the response was YES. [2024-06-04 14:28:22,326 INFO L83 FinitePrefix]: Finished finitePrefix Result has 89223 conditions, 12503 events. 8539/12503 cut-off events. For 654908/654924 co-relation queries the response was YES. Maximal size of possible extension queue 498. Compared 74187 event pairs, 2647 based on Foata normal form. 16/12509 useless extension candidates. Maximal degree in co-relation 89112. Up to 11391 conditions per place. [2024-06-04 14:28:22,379 INFO L140 encePairwiseOnDemand]: 42/52 looper letters, 298 selfloop transitions, 95 changer transitions 0/401 dead transitions. [2024-06-04 14:28:22,379 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 241 places, 401 transitions, 5666 flow [2024-06-04 14:28:22,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-04 14:28:22,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-04 14:28:22,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 176 transitions. [2024-06-04 14:28:22,380 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5641025641025641 [2024-06-04 14:28:22,380 INFO L175 Difference]: Start difference. First operand has 236 places, 375 transitions, 4796 flow. Second operand 6 states and 176 transitions. [2024-06-04 14:28:22,380 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 241 places, 401 transitions, 5666 flow [2024-06-04 14:28:23,617 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 235 places, 401 transitions, 5452 flow, removed 12 selfloop flow, removed 6 redundant places. [2024-06-04 14:28:23,622 INFO L231 Difference]: Finished difference. Result has 236 places, 376 transitions, 4794 flow [2024-06-04 14:28:23,637 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=4585, PETRI_DIFFERENCE_MINUEND_PLACES=230, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=375, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=94, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=281, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=4794, PETRI_PLACES=236, PETRI_TRANSITIONS=376} [2024-06-04 14:28:23,637 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 181 predicate places. [2024-06-04 14:28:23,637 INFO L495 AbstractCegarLoop]: Abstraction has has 236 places, 376 transitions, 4794 flow [2024-06-04 14:28:23,637 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:28:23,638 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:28:23,638 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:28:23,638 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2024-06-04 14:28:23,638 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)] === [2024-06-04 14:28:23,638 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:28:23,638 INFO L85 PathProgramCache]: Analyzing trace with hash -33050436, now seen corresponding path program 1 times [2024-06-04 14:28:23,638 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:28:23,639 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1205957365] [2024-06-04 14:28:23,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:28:23,639 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:28:23,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:28:23,910 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:28:23,910 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:28:23,910 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1205957365] [2024-06-04 14:28:23,910 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1205957365] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:28:23,910 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:28:23,911 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 14:28:23,911 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [613028901] [2024-06-04 14:28:23,911 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:28:23,911 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 14:28:23,911 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:28:23,911 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 14:28:23,912 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-04 14:28:23,962 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 52 [2024-06-04 14:28:23,962 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 236 places, 376 transitions, 4794 flow. Second operand has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:28:23,962 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:28:23,962 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 52 [2024-06-04 14:28:23,962 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:28:25,957 INFO L124 PetriNetUnfolderBase]: 8507/12460 cut-off events. [2024-06-04 14:28:25,957 INFO L125 PetriNetUnfolderBase]: For 625182/625184 co-relation queries the response was YES. [2024-06-04 14:28:26,069 INFO L83 FinitePrefix]: Finished finitePrefix Result has 87870 conditions, 12460 events. 8507/12460 cut-off events. For 625182/625184 co-relation queries the response was YES. Maximal size of possible extension queue 496. Compared 73692 event pairs, 2505 based on Foata normal form. 14/12467 useless extension candidates. Maximal degree in co-relation 87760. Up to 11216 conditions per place. [2024-06-04 14:28:26,244 INFO L140 encePairwiseOnDemand]: 43/52 looper letters, 365 selfloop transitions, 41 changer transitions 0/414 dead transitions. [2024-06-04 14:28:26,244 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 241 places, 414 transitions, 5767 flow [2024-06-04 14:28:26,245 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-04 14:28:26,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-04 14:28:26,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 178 transitions. [2024-06-04 14:28:26,245 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5705128205128205 [2024-06-04 14:28:26,246 INFO L175 Difference]: Start difference. First operand has 236 places, 376 transitions, 4794 flow. Second operand 6 states and 178 transitions. [2024-06-04 14:28:26,246 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 241 places, 414 transitions, 5767 flow [2024-06-04 14:28:27,593 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 238 places, 414 transitions, 5614 flow, removed 5 selfloop flow, removed 3 redundant places. [2024-06-04 14:28:27,597 INFO L231 Difference]: Finished difference. Result has 240 places, 381 transitions, 4794 flow [2024-06-04 14:28:27,597 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=4641, PETRI_DIFFERENCE_MINUEND_PLACES=233, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=376, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=336, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=4794, PETRI_PLACES=240, PETRI_TRANSITIONS=381} [2024-06-04 14:28:27,599 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 185 predicate places. [2024-06-04 14:28:27,599 INFO L495 AbstractCegarLoop]: Abstraction has has 240 places, 381 transitions, 4794 flow [2024-06-04 14:28:27,601 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:28:27,601 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:28:27,601 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:28:27,601 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2024-06-04 14:28:27,601 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)] === [2024-06-04 14:28:27,601 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:28:27,601 INFO L85 PathProgramCache]: Analyzing trace with hash 599147114, now seen corresponding path program 1 times [2024-06-04 14:28:27,602 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:28:27,602 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1688762291] [2024-06-04 14:28:27,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:28:27,602 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:28:27,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:28:27,899 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:28:27,899 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:28:27,899 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1688762291] [2024-06-04 14:28:27,899 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1688762291] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:28:27,899 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:28:27,899 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-04 14:28:27,899 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1191985413] [2024-06-04 14:28:27,900 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:28:27,900 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-04 14:28:27,900 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:28:27,900 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-04 14:28:27,900 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-04 14:28:27,942 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 52 [2024-06-04 14:28:27,942 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 240 places, 381 transitions, 4794 flow. Second operand has 6 states, 6 states have (on average 21.0) internal successors, (126), 6 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:28:27,942 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:28:27,942 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 52 [2024-06-04 14:28:27,942 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:28:30,031 INFO L124 PetriNetUnfolderBase]: 7752/11549 cut-off events. [2024-06-04 14:28:30,031 INFO L125 PetriNetUnfolderBase]: For 693205/693359 co-relation queries the response was YES. [2024-06-04 14:28:30,118 INFO L83 FinitePrefix]: Finished finitePrefix Result has 86126 conditions, 11549 events. 7752/11549 cut-off events. For 693205/693359 co-relation queries the response was YES. Maximal size of possible extension queue 487. Compared 70763 event pairs, 2364 based on Foata normal form. 65/11385 useless extension candidates. Maximal degree in co-relation 86013. Up to 10124 conditions per place. [2024-06-04 14:28:30,173 INFO L140 encePairwiseOnDemand]: 44/52 looper letters, 296 selfloop transitions, 41 changer transitions 0/396 dead transitions. [2024-06-04 14:28:30,174 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 243 places, 396 transitions, 5554 flow [2024-06-04 14:28:30,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-04 14:28:30,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-04 14:28:30,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 125 transitions. [2024-06-04 14:28:30,175 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6009615384615384 [2024-06-04 14:28:30,175 INFO L175 Difference]: Start difference. First operand has 240 places, 381 transitions, 4794 flow. Second operand 4 states and 125 transitions. [2024-06-04 14:28:30,175 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 243 places, 396 transitions, 5554 flow [2024-06-04 14:28:32,304 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 241 places, 396 transitions, 5504 flow, removed 8 selfloop flow, removed 2 redundant places. [2024-06-04 14:28:32,308 INFO L231 Difference]: Finished difference. Result has 242 places, 385 transitions, 4910 flow [2024-06-04 14:28:32,309 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=4744, PETRI_DIFFERENCE_MINUEND_PLACES=238, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=381, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=340, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=4910, PETRI_PLACES=242, PETRI_TRANSITIONS=385} [2024-06-04 14:28:32,309 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 187 predicate places. [2024-06-04 14:28:32,309 INFO L495 AbstractCegarLoop]: Abstraction has has 242 places, 385 transitions, 4910 flow [2024-06-04 14:28:32,310 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 21.0) internal successors, (126), 6 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:28:32,310 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:28:32,310 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:28:32,310 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2024-06-04 14:28:32,310 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)] === [2024-06-04 14:28:32,310 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:28:32,310 INFO L85 PathProgramCache]: Analyzing trace with hash -1469081754, now seen corresponding path program 2 times [2024-06-04 14:28:32,311 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:28:32,311 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1189687150] [2024-06-04 14:28:32,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:28:32,311 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:28:32,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:28:32,478 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:28:32,478 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:28:32,478 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1189687150] [2024-06-04 14:28:32,478 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1189687150] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:28:32,478 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:28:32,478 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-04 14:28:32,478 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1043233829] [2024-06-04 14:28:32,479 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:28:32,479 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-04 14:28:32,479 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:28:32,479 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-04 14:28:32,479 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-04 14:28:32,523 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 52 [2024-06-04 14:28:32,523 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 242 places, 385 transitions, 4910 flow. Second operand has 6 states, 6 states have (on average 21.0) internal successors, (126), 6 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:28:32,523 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:28:32,524 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 52 [2024-06-04 14:28:32,524 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:28:34,744 INFO L124 PetriNetUnfolderBase]: 7736/11489 cut-off events. [2024-06-04 14:28:34,744 INFO L125 PetriNetUnfolderBase]: For 716286/716440 co-relation queries the response was YES. [2024-06-04 14:28:34,832 INFO L83 FinitePrefix]: Finished finitePrefix Result has 87755 conditions, 11489 events. 7736/11489 cut-off events. For 716286/716440 co-relation queries the response was YES. Maximal size of possible extension queue 485. Compared 69978 event pairs, 2364 based on Foata normal form. 65/11325 useless extension candidates. Maximal degree in co-relation 87640. Up to 10096 conditions per place. [2024-06-04 14:28:34,890 INFO L140 encePairwiseOnDemand]: 44/52 looper letters, 297 selfloop transitions, 45 changer transitions 0/401 dead transitions. [2024-06-04 14:28:34,890 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 246 places, 401 transitions, 5690 flow [2024-06-04 14:28:34,890 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-04 14:28:34,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-04 14:28:34,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 148 transitions. [2024-06-04 14:28:34,891 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5692307692307692 [2024-06-04 14:28:34,891 INFO L175 Difference]: Start difference. First operand has 242 places, 385 transitions, 4910 flow. Second operand 5 states and 148 transitions. [2024-06-04 14:28:34,891 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 246 places, 401 transitions, 5690 flow [2024-06-04 14:28:36,126 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 244 places, 401 transitions, 5570 flow, removed 27 selfloop flow, removed 2 redundant places. [2024-06-04 14:28:36,130 INFO L231 Difference]: Finished difference. Result has 245 places, 389 transitions, 4961 flow [2024-06-04 14:28:36,131 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=4796, PETRI_DIFFERENCE_MINUEND_PLACES=240, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=385, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=340, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=4961, PETRI_PLACES=245, PETRI_TRANSITIONS=389} [2024-06-04 14:28:36,131 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 190 predicate places. [2024-06-04 14:28:36,131 INFO L495 AbstractCegarLoop]: Abstraction has has 245 places, 389 transitions, 4961 flow [2024-06-04 14:28:36,131 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 21.0) internal successors, (126), 6 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:28:36,132 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:28:36,132 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:28:36,132 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2024-06-04 14:28:36,132 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)] === [2024-06-04 14:28:36,132 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:28:36,132 INFO L85 PathProgramCache]: Analyzing trace with hash 105682952, now seen corresponding path program 1 times [2024-06-04 14:28:36,132 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:28:36,133 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1949868663] [2024-06-04 14:28:36,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:28:36,133 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:28:36,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:28:36,505 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:28:36,506 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:28:36,506 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1949868663] [2024-06-04 14:28:36,506 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1949868663] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:28:36,506 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:28:36,506 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 14:28:36,506 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [737064074] [2024-06-04 14:28:36,506 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:28:36,507 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 14:28:36,507 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:28:36,507 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 14:28:36,507 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-04 14:28:36,581 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 52 [2024-06-04 14:28:36,582 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 245 places, 389 transitions, 4961 flow. Second operand has 8 states, 8 states have (on average 19.125) internal successors, (153), 8 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:28:36,582 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:28:36,582 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 52 [2024-06-04 14:28:36,582 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:28:38,918 INFO L124 PetriNetUnfolderBase]: 8300/12394 cut-off events. [2024-06-04 14:28:38,918 INFO L125 PetriNetUnfolderBase]: For 713618/713628 co-relation queries the response was YES. [2024-06-04 14:28:39,011 INFO L83 FinitePrefix]: Finished finitePrefix Result has 92748 conditions, 12394 events. 8300/12394 cut-off events. For 713618/713628 co-relation queries the response was YES. Maximal size of possible extension queue 509. Compared 75870 event pairs, 2387 based on Foata normal form. 30/12418 useless extension candidates. Maximal degree in co-relation 92632. Up to 10750 conditions per place. [2024-06-04 14:28:39,068 INFO L140 encePairwiseOnDemand]: 42/52 looper letters, 385 selfloop transitions, 49 changer transitions 0/445 dead transitions. [2024-06-04 14:28:39,069 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 251 places, 445 transitions, 6290 flow [2024-06-04 14:28:39,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 14:28:39,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 14:28:39,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 216 transitions. [2024-06-04 14:28:39,070 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5934065934065934 [2024-06-04 14:28:39,070 INFO L175 Difference]: Start difference. First operand has 245 places, 389 transitions, 4961 flow. Second operand 7 states and 216 transitions. [2024-06-04 14:28:39,070 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 251 places, 445 transitions, 6290 flow [2024-06-04 14:28:40,812 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 248 places, 445 transitions, 6157 flow, removed 24 selfloop flow, removed 3 redundant places. [2024-06-04 14:28:40,817 INFO L231 Difference]: Finished difference. Result has 251 places, 400 transitions, 5105 flow [2024-06-04 14:28:40,818 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=4828, PETRI_DIFFERENCE_MINUEND_PLACES=242, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=389, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=343, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5105, PETRI_PLACES=251, PETRI_TRANSITIONS=400} [2024-06-04 14:28:40,818 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 196 predicate places. [2024-06-04 14:28:40,818 INFO L495 AbstractCegarLoop]: Abstraction has has 251 places, 400 transitions, 5105 flow [2024-06-04 14:28:40,819 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 19.125) internal successors, (153), 8 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:28:40,819 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:28:40,819 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:28:40,819 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2024-06-04 14:28:40,819 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)] === [2024-06-04 14:28:40,819 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:28:40,819 INFO L85 PathProgramCache]: Analyzing trace with hash 548518920, now seen corresponding path program 2 times [2024-06-04 14:28:40,820 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:28:40,820 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1402492202] [2024-06-04 14:28:40,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:28:40,821 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:28:40,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:28:41,054 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:28:41,054 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:28:41,055 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1402492202] [2024-06-04 14:28:41,055 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1402492202] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:28:41,055 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:28:41,056 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 14:28:41,056 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1518680890] [2024-06-04 14:28:41,056 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:28:41,056 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 14:28:41,057 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:28:41,060 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 14:28:41,061 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-04 14:28:41,112 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 52 [2024-06-04 14:28:41,113 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 251 places, 400 transitions, 5105 flow. Second operand has 8 states, 8 states have (on average 19.125) internal successors, (153), 8 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:28:41,113 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:28:41,113 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 52 [2024-06-04 14:28:41,113 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:28:43,374 INFO L124 PetriNetUnfolderBase]: 8640/12906 cut-off events. [2024-06-04 14:28:43,374 INFO L125 PetriNetUnfolderBase]: For 785827/785837 co-relation queries the response was YES. [2024-06-04 14:28:43,491 INFO L83 FinitePrefix]: Finished finitePrefix Result has 98983 conditions, 12906 events. 8640/12906 cut-off events. For 785827/785837 co-relation queries the response was YES. Maximal size of possible extension queue 545. Compared 79623 event pairs, 2631 based on Foata normal form. 30/12930 useless extension candidates. Maximal degree in co-relation 98864. Up to 11484 conditions per place. [2024-06-04 14:28:43,785 INFO L140 encePairwiseOnDemand]: 42/52 looper letters, 388 selfloop transitions, 45 changer transitions 0/444 dead transitions. [2024-06-04 14:28:43,785 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 257 places, 444 transitions, 6368 flow [2024-06-04 14:28:43,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 14:28:43,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 14:28:43,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 213 transitions. [2024-06-04 14:28:43,786 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5851648351648352 [2024-06-04 14:28:43,786 INFO L175 Difference]: Start difference. First operand has 251 places, 400 transitions, 5105 flow. Second operand 7 states and 213 transitions. [2024-06-04 14:28:43,786 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 257 places, 444 transitions, 6368 flow [2024-06-04 14:28:45,393 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 255 places, 444 transitions, 6281 flow, removed 22 selfloop flow, removed 2 redundant places. [2024-06-04 14:28:45,398 INFO L231 Difference]: Finished difference. Result has 257 places, 405 transitions, 5217 flow [2024-06-04 14:28:45,398 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=5022, PETRI_DIFFERENCE_MINUEND_PLACES=249, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=400, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=357, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5217, PETRI_PLACES=257, PETRI_TRANSITIONS=405} [2024-06-04 14:28:45,399 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 202 predicate places. [2024-06-04 14:28:45,399 INFO L495 AbstractCegarLoop]: Abstraction has has 257 places, 405 transitions, 5217 flow [2024-06-04 14:28:45,399 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 19.125) internal successors, (153), 8 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:28:45,399 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:28:45,399 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:28:45,399 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2024-06-04 14:28:45,399 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)] === [2024-06-04 14:28:45,400 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:28:45,400 INFO L85 PathProgramCache]: Analyzing trace with hash 548666790, now seen corresponding path program 3 times [2024-06-04 14:28:45,400 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:28:45,400 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1136447869] [2024-06-04 14:28:45,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:28:45,400 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:28:45,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:28:45,595 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:28:45,595 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:28:45,595 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1136447869] [2024-06-04 14:28:45,596 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1136447869] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:28:45,596 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:28:45,596 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 14:28:45,596 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [621629070] [2024-06-04 14:28:45,596 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:28:45,596 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 14:28:45,596 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:28:45,597 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 14:28:45,597 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-04 14:28:45,659 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 52 [2024-06-04 14:28:45,659 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 257 places, 405 transitions, 5217 flow. Second operand has 8 states, 8 states have (on average 19.125) internal successors, (153), 8 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:28:45,659 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:28:45,659 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 52 [2024-06-04 14:28:45,660 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:28:47,956 INFO L124 PetriNetUnfolderBase]: 8568/12802 cut-off events. [2024-06-04 14:28:47,957 INFO L125 PetriNetUnfolderBase]: For 789315/789325 co-relation queries the response was YES. [2024-06-04 14:28:48,065 INFO L83 FinitePrefix]: Finished finitePrefix Result has 97692 conditions, 12802 events. 8568/12802 cut-off events. For 789315/789325 co-relation queries the response was YES. Maximal size of possible extension queue 540. Compared 78875 event pairs, 2633 based on Foata normal form. 38/12834 useless extension candidates. Maximal degree in co-relation 97570. Up to 11626 conditions per place. [2024-06-04 14:28:48,140 INFO L140 encePairwiseOnDemand]: 42/52 looper letters, 387 selfloop transitions, 42 changer transitions 0/440 dead transitions. [2024-06-04 14:28:48,140 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 263 places, 440 transitions, 6199 flow [2024-06-04 14:28:48,141 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 14:28:48,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 14:28:48,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 208 transitions. [2024-06-04 14:28:48,142 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5714285714285714 [2024-06-04 14:28:48,142 INFO L175 Difference]: Start difference. First operand has 257 places, 405 transitions, 5217 flow. Second operand 7 states and 208 transitions. [2024-06-04 14:28:48,142 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 263 places, 440 transitions, 6199 flow [2024-06-04 14:28:50,171 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 260 places, 440 transitions, 6110 flow, removed 22 selfloop flow, removed 3 redundant places. [2024-06-04 14:28:50,176 INFO L231 Difference]: Finished difference. Result has 261 places, 406 transitions, 5240 flow [2024-06-04 14:28:50,176 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=5132, PETRI_DIFFERENCE_MINUEND_PLACES=254, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=405, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=363, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5240, PETRI_PLACES=261, PETRI_TRANSITIONS=406} [2024-06-04 14:28:50,176 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 206 predicate places. [2024-06-04 14:28:50,176 INFO L495 AbstractCegarLoop]: Abstraction has has 261 places, 406 transitions, 5240 flow [2024-06-04 14:28:50,177 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 19.125) internal successors, (153), 8 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:28:50,177 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:28:50,177 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:28:50,177 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64 [2024-06-04 14:28:50,177 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)] === [2024-06-04 14:28:50,177 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:28:50,177 INFO L85 PathProgramCache]: Analyzing trace with hash -1155419214, now seen corresponding path program 4 times [2024-06-04 14:28:50,178 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:28:50,178 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [990821330] [2024-06-04 14:28:50,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:28:50,178 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:28:50,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:28:50,392 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:28:50,393 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:28:50,393 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [990821330] [2024-06-04 14:28:50,393 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [990821330] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:28:50,393 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:28:50,393 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 14:28:50,394 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [62207708] [2024-06-04 14:28:50,394 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:28:50,394 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 14:28:50,394 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:28:50,394 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 14:28:50,394 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-04 14:28:50,459 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 52 [2024-06-04 14:28:50,459 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 261 places, 406 transitions, 5240 flow. Second operand has 8 states, 8 states have (on average 19.125) internal successors, (153), 8 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:28:50,459 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:28:50,459 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 52 [2024-06-04 14:28:50,460 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:28:53,019 INFO L124 PetriNetUnfolderBase]: 8725/13041 cut-off events. [2024-06-04 14:28:53,019 INFO L125 PetriNetUnfolderBase]: For 818605/818615 co-relation queries the response was YES. [2024-06-04 14:28:53,118 INFO L83 FinitePrefix]: Finished finitePrefix Result has 99554 conditions, 13041 events. 8725/13041 cut-off events. For 818605/818615 co-relation queries the response was YES. Maximal size of possible extension queue 559. Compared 80818 event pairs, 2641 based on Foata normal form. 40/13077 useless extension candidates. Maximal degree in co-relation 99430. Up to 11898 conditions per place. [2024-06-04 14:28:53,180 INFO L140 encePairwiseOnDemand]: 42/52 looper letters, 396 selfloop transitions, 39 changer transitions 0/446 dead transitions. [2024-06-04 14:28:53,180 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 268 places, 446 transitions, 6270 flow [2024-06-04 14:28:53,181 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 14:28:53,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 14:28:53,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 232 transitions. [2024-06-04 14:28:53,182 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5576923076923077 [2024-06-04 14:28:53,182 INFO L175 Difference]: Start difference. First operand has 261 places, 406 transitions, 5240 flow. Second operand 8 states and 232 transitions. [2024-06-04 14:28:53,182 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 268 places, 446 transitions, 6270 flow [2024-06-04 14:28:54,530 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 263 places, 446 transitions, 6186 flow, removed 2 selfloop flow, removed 5 redundant places. [2024-06-04 14:28:54,535 INFO L231 Difference]: Finished difference. Result has 264 places, 408 transitions, 5290 flow [2024-06-04 14:28:54,535 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=5156, PETRI_DIFFERENCE_MINUEND_PLACES=256, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=406, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=367, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5290, PETRI_PLACES=264, PETRI_TRANSITIONS=408} [2024-06-04 14:28:54,535 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 209 predicate places. [2024-06-04 14:28:54,535 INFO L495 AbstractCegarLoop]: Abstraction has has 264 places, 408 transitions, 5290 flow [2024-06-04 14:28:54,535 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 19.125) internal successors, (153), 8 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:28:54,535 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:28:54,536 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:28:54,536 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65 [2024-06-04 14:28:54,536 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)] === [2024-06-04 14:28:54,536 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:28:54,536 INFO L85 PathProgramCache]: Analyzing trace with hash -1160781594, now seen corresponding path program 5 times [2024-06-04 14:28:54,536 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:28:54,536 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1358399925] [2024-06-04 14:28:54,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:28:54,537 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:28:54,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:28:54,737 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:28:54,738 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:28:54,738 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1358399925] [2024-06-04 14:28:54,738 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1358399925] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:28:54,738 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:28:54,738 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 14:28:54,738 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [518353430] [2024-06-04 14:28:54,738 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:28:54,738 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 14:28:54,739 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:28:54,739 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 14:28:54,739 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-04 14:28:54,799 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 52 [2024-06-04 14:28:54,799 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 264 places, 408 transitions, 5290 flow. Second operand has 8 states, 8 states have (on average 19.125) internal successors, (153), 8 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:28:54,799 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:28:54,799 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 52 [2024-06-04 14:28:54,799 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand