./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-wmm/thin002_pso.oepc_pso.opt_tso.oepc_tso.opt.i --full-output --witness-type correctness_witness --witnessparser.only.consider.loop.invariants false --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --validate ./goblint.2024-06-19_11-23-25.files/mutex-meet-rel/thin002_pso.oepc_pso.opt_tso.oepc_tso.opt.yml/witness.yml --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version eb4cb34f Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReachWitnessValidation.xml -i ../../../trunk/examples/svcomp/pthread-wmm/thin002_pso.oepc_pso.opt_tso.oepc_tso.opt.i ./goblint.2024-06-19_11-23-25.files/mutex-meet-rel/thin002_pso.oepc_pso.opt_tso.oepc_tso.opt.yml/witness.yml -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --traceabstraction.compute.hoare.annotation.of.negated.interpolant.automaton,.abstraction.and.cfg false --witnessparser.only.consider.loop.invariants false --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --- Real Ultimate output --- This is Ultimate 0.2.4-tmp.fs.goblint-validation-eb4cb34-m [2024-06-21 18:14:44,689 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-21 18:14:44,782 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-21 18:14:44,785 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-21 18:14:44,786 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-21 18:14:44,804 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-21 18:14:44,805 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-21 18:14:44,805 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-21 18:14:44,805 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-21 18:14:44,806 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-21 18:14:44,806 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-21 18:14:44,806 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-21 18:14:44,806 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-21 18:14:44,806 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-21 18:14:44,807 INFO L153 SettingsManager]: * Use SBE=true [2024-06-21 18:14:44,807 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-21 18:14:44,807 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-21 18:14:44,807 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-21 18:14:44,807 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-21 18:14:44,808 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-21 18:14:44,808 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-21 18:14:44,811 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-21 18:14:44,811 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-21 18:14:44,811 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-21 18:14:44,811 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-21 18:14:44,812 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-21 18:14:44,812 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-21 18:14:44,812 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-21 18:14:44,812 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-21 18:14:44,813 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-21 18:14:44,813 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-21 18:14:44,813 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-21 18:14:44,814 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-21 18:14:44,814 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-21 18:14:44,814 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-21 18:14:44,814 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-21 18:14:44,814 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-21 18:14:44,814 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-21 18:14:44,815 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-21 18:14:44,815 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-21 18:14:44,815 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-21 18:14:44,815 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-21 18:14:44,815 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-21 18:14:44,815 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false [2024-06-21 18:14:45,036 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-21 18:14:45,063 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-21 18:14:45,065 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-21 18:14:45,067 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-06-21 18:14:45,068 INFO L274 PluginConnector]: Witness Parser initialized [2024-06-21 18:14:45,069 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-06-19_11-23-25.files/mutex-meet-rel/thin002_pso.oepc_pso.opt_tso.oepc_tso.opt.yml/witness.yml [2024-06-21 18:14:45,176 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-21 18:14:45,176 INFO L274 PluginConnector]: CDTParser initialized [2024-06-21 18:14:45,176 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/thin002_pso.oepc_pso.opt_tso.oepc_tso.opt.i [2024-06-21 18:14:46,127 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-21 18:14:46,344 INFO L384 CDTParser]: Found 1 translation units. [2024-06-21 18:14:46,345 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/thin002_pso.oepc_pso.opt_tso.oepc_tso.opt.i [2024-06-21 18:14:46,355 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bbdf71728/51f207080ad24298aa847153be13457b/FLAG07da57d69 [2024-06-21 18:14:46,367 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bbdf71728/51f207080ad24298aa847153be13457b [2024-06-21 18:14:46,368 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-21 18:14:46,369 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-06-21 18:14:46,371 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-21 18:14:46,371 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-21 18:14:46,374 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-21 18:14:46,375 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 21.06 06:14:45" (1/2) ... [2024-06-21 18:14:46,376 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5f23a918 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 06:14:46, skipping insertion in model container [2024-06-21 18:14:46,376 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 21.06 06:14:45" (1/2) ... [2024-06-21 18:14:46,378 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@388628b8 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 06:14:46, skipping insertion in model container [2024-06-21 18:14:46,378 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.06 06:14:46" (2/2) ... [2024-06-21 18:14:46,379 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5f23a918 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 06:14:46, skipping insertion in model container [2024-06-21 18:14:46,379 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.06 06:14:46" (2/2) ... [2024-06-21 18:14:46,379 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-06-21 18:14:46,400 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-06-21 18:14:46,401 INFO L97 edCorrectnessWitness]: Location invariant before [L803-L803] ! multithreaded || (((((((((((((0LL - (long long )__unbuffered_p0_EAX) + (long long )a >= 0LL && (0LL - (long long )__unbuffered_p1_EAX) + (long long )x >= 0LL) && (0LL - (long long )__unbuffered_p2_EAX) + (long long )y >= 0LL) && (0LL - (long long )__unbuffered_p3_EAX) + (long long )z >= 0LL) && (1LL - (long long )__unbuffered_p1_EAX) + (long long )__unbuffered_p2_EAX >= 0LL) && (1LL - (long long )__unbuffered_p1_EAX) + (long long )__unbuffered_p3_EAX >= 0LL) && (1LL - (long long )__unbuffered_p1_EAX) + (long long )a >= 0LL) && (1LL - (long long )__unbuffered_p1_EAX) + (long long )main$tmp_guard1 >= 0LL) && (1LL - (long long )__unbuffered_p1_EAX) + (long long )y >= 0LL) && (1LL - (long long )__unbuffered_p1_EAX) + (long long )z >= 0LL) && (1LL + (long long )__unbuffered_cnt) - (long long )__unbuffered_p1_EAX >= 0LL) && (1LL + (long long )__unbuffered_p0_EAX) - (long long )__unbuffered_p1_EAX >= 0LL) && (2LL - (long long )__unbuffered_p1_EAX) - (long long )x >= 0LL) [2024-06-21 18:14:46,402 INFO L97 edCorrectnessWitness]: Location invariant before [L807-L807] ! multithreaded || (((((((((((((0LL - (long long )__unbuffered_p0_EAX) + (long long )a >= 0LL && (0LL - (long long )__unbuffered_p1_EAX) + (long long )x >= 0LL) && (0LL - (long long )__unbuffered_p2_EAX) + (long long )y >= 0LL) && (0LL - (long long )__unbuffered_p3_EAX) + (long long )z >= 0LL) && (1LL - (long long )__unbuffered_p1_EAX) + (long long )__unbuffered_p2_EAX >= 0LL) && (1LL - (long long )__unbuffered_p1_EAX) + (long long )__unbuffered_p3_EAX >= 0LL) && (1LL - (long long )__unbuffered_p1_EAX) + (long long )a >= 0LL) && (1LL - (long long )__unbuffered_p1_EAX) + (long long )main$tmp_guard1 >= 0LL) && (1LL - (long long )__unbuffered_p1_EAX) + (long long )y >= 0LL) && (1LL - (long long )__unbuffered_p1_EAX) + (long long )z >= 0LL) && (1LL + (long long )__unbuffered_cnt) - (long long )__unbuffered_p1_EAX >= 0LL) && (1LL + (long long )__unbuffered_p0_EAX) - (long long )__unbuffered_p1_EAX >= 0LL) && (2LL - (long long )__unbuffered_p1_EAX) - (long long )x >= 0LL) [2024-06-21 18:14:46,402 INFO L97 edCorrectnessWitness]: Location invariant before [L805-L805] ! multithreaded || (((((((((((((0LL - (long long )__unbuffered_p0_EAX) + (long long )a >= 0LL && (0LL - (long long )__unbuffered_p1_EAX) + (long long )x >= 0LL) && (0LL - (long long )__unbuffered_p2_EAX) + (long long )y >= 0LL) && (0LL - (long long )__unbuffered_p3_EAX) + (long long )z >= 0LL) && (1LL - (long long )__unbuffered_p1_EAX) + (long long )__unbuffered_p2_EAX >= 0LL) && (1LL - (long long )__unbuffered_p1_EAX) + (long long )__unbuffered_p3_EAX >= 0LL) && (1LL - (long long )__unbuffered_p1_EAX) + (long long )a >= 0LL) && (1LL - (long long )__unbuffered_p1_EAX) + (long long )main$tmp_guard1 >= 0LL) && (1LL - (long long )__unbuffered_p1_EAX) + (long long )y >= 0LL) && (1LL - (long long )__unbuffered_p1_EAX) + (long long )z >= 0LL) && (1LL + (long long )__unbuffered_cnt) - (long long )__unbuffered_p1_EAX >= 0LL) && (1LL + (long long )__unbuffered_p0_EAX) - (long long )__unbuffered_p1_EAX >= 0LL) && (2LL - (long long )__unbuffered_p1_EAX) - (long long )x >= 0LL) [2024-06-21 18:14:46,402 INFO L97 edCorrectnessWitness]: Location invariant before [L808-L808] ! multithreaded || (((((((((((((0LL - (long long )__unbuffered_p0_EAX) + (long long )a >= 0LL && (0LL - (long long )__unbuffered_p1_EAX) + (long long )x >= 0LL) && (0LL - (long long )__unbuffered_p2_EAX) + (long long )y >= 0LL) && (0LL - (long long )__unbuffered_p3_EAX) + (long long )z >= 0LL) && (1LL - (long long )__unbuffered_p1_EAX) + (long long )__unbuffered_p2_EAX >= 0LL) && (1LL - (long long )__unbuffered_p1_EAX) + (long long )__unbuffered_p3_EAX >= 0LL) && (1LL - (long long )__unbuffered_p1_EAX) + (long long )a >= 0LL) && (1LL - (long long )__unbuffered_p1_EAX) + (long long )main$tmp_guard1 >= 0LL) && (1LL - (long long )__unbuffered_p1_EAX) + (long long )y >= 0LL) && (1LL - (long long )__unbuffered_p1_EAX) + (long long )z >= 0LL) && (1LL + (long long )__unbuffered_cnt) - (long long )__unbuffered_p1_EAX >= 0LL) && (1LL + (long long )__unbuffered_p0_EAX) - (long long )__unbuffered_p1_EAX >= 0LL) && (2LL - (long long )__unbuffered_p1_EAX) - (long long )x >= 0LL) [2024-06-21 18:14:46,403 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-06-21 18:14:46,403 INFO L106 edCorrectnessWitness]: ghost_update [L801-L801] multithreaded = 1; [2024-06-21 18:14:46,441 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-21 18:14:46,736 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-21 18:14:46,748 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-06-21 18:14:46,842 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-21 18:14:46,871 INFO L206 MainTranslator]: Completed translation [2024-06-21 18:14:46,872 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 06:14:46 WrapperNode [2024-06-21 18:14:46,872 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-21 18:14:46,872 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-21 18:14:46,873 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-21 18:14:46,873 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-21 18:14:46,878 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 06:14:46" (1/1) ... [2024-06-21 18:14:46,900 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 06:14:46" (1/1) ... [2024-06-21 18:14:46,947 INFO L138 Inliner]: procedures = 176, calls = 51, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 77 [2024-06-21 18:14:46,953 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-21 18:14:46,954 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-21 18:14:46,954 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-21 18:14:46,954 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-21 18:14:46,962 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 06:14:46" (1/1) ... [2024-06-21 18:14:46,962 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 06:14:46" (1/1) ... [2024-06-21 18:14:46,973 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 06:14:46" (1/1) ... [2024-06-21 18:14:46,993 INFO L175 MemorySlicer]: Split 2 memory accesses to 1 slices as follows [2]. 100 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2]. The 0 writes are split as follows [0]. [2024-06-21 18:14:46,994 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 06:14:46" (1/1) ... [2024-06-21 18:14:46,994 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 06:14:46" (1/1) ... [2024-06-21 18:14:47,002 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 06:14:46" (1/1) ... [2024-06-21 18:14:47,008 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 06:14:46" (1/1) ... [2024-06-21 18:14:47,011 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 06:14:46" (1/1) ... [2024-06-21 18:14:47,015 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 06:14:46" (1/1) ... [2024-06-21 18:14:47,017 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-21 18:14:47,021 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-21 18:14:47,021 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-21 18:14:47,021 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-21 18:14:47,022 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 06:14:46" (1/1) ... [2024-06-21 18:14:47,026 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-21 18:14:47,033 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-21 18:14:47,062 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-06-21 18:14:47,070 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-06-21 18:14:47,091 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-06-21 18:14:47,091 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-21 18:14:47,092 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2024-06-21 18:14:47,092 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2024-06-21 18:14:47,092 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2024-06-21 18:14:47,092 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2024-06-21 18:14:47,092 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2024-06-21 18:14:47,092 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2024-06-21 18:14:47,092 INFO L130 BoogieDeclarations]: Found specification of procedure P3 [2024-06-21 18:14:47,093 INFO L138 BoogieDeclarations]: Found implementation of procedure P3 [2024-06-21 18:14:47,093 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-21 18:14:47,093 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-06-21 18:14:47,093 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-21 18:14:47,094 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-21 18:14:47,095 WARN L214 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2024-06-21 18:14:47,192 INFO L244 CfgBuilder]: Building ICFG [2024-06-21 18:14:47,194 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-21 18:14:47,388 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-21 18:14:47,389 INFO L293 CfgBuilder]: Performing block encoding [2024-06-21 18:14:47,469 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-21 18:14:47,473 INFO L320 CfgBuilder]: Removed 0 assume(true) statements. [2024-06-21 18:14:47,479 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.06 06:14:47 BoogieIcfgContainer [2024-06-21 18:14:47,479 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-21 18:14:47,480 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-21 18:14:47,482 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-21 18:14:47,484 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-21 18:14:47,484 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 21.06 06:14:45" (1/4) ... [2024-06-21 18:14:47,485 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@deb61c6 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 21.06 06:14:47, skipping insertion in model container [2024-06-21 18:14:47,485 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.06 06:14:46" (2/4) ... [2024-06-21 18:14:47,486 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@deb61c6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.06 06:14:47, skipping insertion in model container [2024-06-21 18:14:47,487 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 06:14:46" (3/4) ... [2024-06-21 18:14:47,488 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@deb61c6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.06 06:14:47, skipping insertion in model container [2024-06-21 18:14:47,488 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.06 06:14:47" (4/4) ... [2024-06-21 18:14:47,489 INFO L112 eAbstractionObserver]: Analyzing ICFG thin002_pso.oepc_pso.opt_tso.oepc_tso.opt.i [2024-06-21 18:14:47,505 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-21 18:14:47,505 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 4 error locations. [2024-06-21 18:14:47,505 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-21 18:14:47,567 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-06-21 18:14:47,595 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 64 places, 51 transitions, 118 flow [2024-06-21 18:14:47,628 INFO L124 PetriNetUnfolderBase]: 0/47 cut-off events. [2024-06-21 18:14:47,629 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-21 18:14:47,631 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60 conditions, 47 events. 0/47 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 81 event pairs, 0 based on Foata normal form. 0/43 useless extension candidates. Maximal degree in co-relation 0. Up to 1 conditions per place. [2024-06-21 18:14:47,631 INFO L82 GeneralOperation]: Start removeDead. Operand has 64 places, 51 transitions, 118 flow [2024-06-21 18:14:47,636 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 54 places, 41 transitions, 94 flow [2024-06-21 18:14:47,647 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-21 18:14:47,654 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;@6d44934c, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-21 18:14:47,654 INFO L358 AbstractCegarLoop]: Starting to check reachability of 8 error locations. [2024-06-21 18:14:47,659 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-21 18:14:47,659 INFO L124 PetriNetUnfolderBase]: 0/5 cut-off events. [2024-06-21 18:14:47,659 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-21 18:14:47,659 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:14:47,660 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2024-06-21 18:14:47,660 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 18:14:47,666 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:14:47,666 INFO L85 PathProgramCache]: Analyzing trace with hash 237074108, now seen corresponding path program 1 times [2024-06-21 18:14:47,675 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:14:47,675 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [129576168] [2024-06-21 18:14:47,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:14:47,675 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:14:47,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:14:48,090 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:14:48,091 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:14:48,092 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [129576168] [2024-06-21 18:14:48,092 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [129576168] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:14:48,092 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:14:48,093 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-06-21 18:14:48,094 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [385121159] [2024-06-21 18:14:48,094 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:14:48,101 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-21 18:14:48,105 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:14:48,126 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-21 18:14:48,127 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-21 18:14:48,163 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 21 out of 51 [2024-06-21 18:14:48,166 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 41 transitions, 94 flow. Second operand has 3 states, 3 states have (on average 22.333333333333332) internal successors, (67), 3 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:14:48,167 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:14:48,167 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 21 of 51 [2024-06-21 18:14:48,167 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:14:48,591 INFO L124 PetriNetUnfolderBase]: 2723/4077 cut-off events. [2024-06-21 18:14:48,591 INFO L125 PetriNetUnfolderBase]: For 82/82 co-relation queries the response was YES. [2024-06-21 18:14:48,601 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8077 conditions, 4077 events. 2723/4077 cut-off events. For 82/82 co-relation queries the response was YES. Maximal size of possible extension queue 214. Compared 22522 event pairs, 1898 based on Foata normal form. 1/3991 useless extension candidates. Maximal degree in co-relation 8064. Up to 3813 conditions per place. [2024-06-21 18:14:48,621 INFO L140 encePairwiseOnDemand]: 42/51 looper letters, 37 selfloop transitions, 5 changer transitions 0/55 dead transitions. [2024-06-21 18:14:48,621 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 55 transitions, 215 flow [2024-06-21 18:14:48,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-21 18:14:48,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-21 18:14:48,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 109 transitions. [2024-06-21 18:14:48,632 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7124183006535948 [2024-06-21 18:14:48,634 INFO L175 Difference]: Start difference. First operand has 54 places, 41 transitions, 94 flow. Second operand 3 states and 109 transitions. [2024-06-21 18:14:48,634 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 55 transitions, 215 flow [2024-06-21 18:14:48,637 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 55 transitions, 208 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-06-21 18:14:48,642 INFO L231 Difference]: Finished difference. Result has 53 places, 45 transitions, 129 flow [2024-06-21 18:14:48,643 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=90, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=129, PETRI_PLACES=53, PETRI_TRANSITIONS=45} [2024-06-21 18:14:48,648 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, -1 predicate places. [2024-06-21 18:14:48,648 INFO L495 AbstractCegarLoop]: Abstraction has has 53 places, 45 transitions, 129 flow [2024-06-21 18:14:48,648 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.333333333333332) internal successors, (67), 3 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:14:48,649 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:14:48,649 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:14:48,649 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-21 18:14:48,649 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 18:14:48,650 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:14:48,650 INFO L85 PathProgramCache]: Analyzing trace with hash 1772714873, now seen corresponding path program 1 times [2024-06-21 18:14:48,650 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:14:48,650 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [399259623] [2024-06-21 18:14:48,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:14:48,650 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:14:48,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:14:48,872 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:14:48,872 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:14:48,873 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [399259623] [2024-06-21 18:14:48,873 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [399259623] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:14:48,873 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:14:48,873 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-21 18:14:48,873 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1137435795] [2024-06-21 18:14:48,873 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:14:48,874 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-21 18:14:48,875 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:14:48,875 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-21 18:14:48,875 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-21 18:14:48,940 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 51 [2024-06-21 18:14:48,941 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 45 transitions, 129 flow. Second operand has 5 states, 5 states have (on average 20.2) internal successors, (101), 5 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:14:48,941 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:14:48,941 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 51 [2024-06-21 18:14:48,941 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:14:49,456 INFO L124 PetriNetUnfolderBase]: 4389/6481 cut-off events. [2024-06-21 18:14:49,456 INFO L125 PetriNetUnfolderBase]: For 1055/1075 co-relation queries the response was YES. [2024-06-21 18:14:49,464 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14771 conditions, 6481 events. 4389/6481 cut-off events. For 1055/1075 co-relation queries the response was YES. Maximal size of possible extension queue 308. Compared 36508 event pairs, 2308 based on Foata normal form. 10/6482 useless extension candidates. Maximal degree in co-relation 14759. Up to 6039 conditions per place. [2024-06-21 18:14:49,491 INFO L140 encePairwiseOnDemand]: 41/51 looper letters, 54 selfloop transitions, 9 changer transitions 0/74 dead transitions. [2024-06-21 18:14:49,491 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 74 transitions, 338 flow [2024-06-21 18:14:49,492 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-21 18:14:49,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-21 18:14:49,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 139 transitions. [2024-06-21 18:14:49,496 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6813725490196079 [2024-06-21 18:14:49,497 INFO L175 Difference]: Start difference. First operand has 53 places, 45 transitions, 129 flow. Second operand 4 states and 139 transitions. [2024-06-21 18:14:49,497 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 74 transitions, 338 flow [2024-06-21 18:14:49,499 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 74 transitions, 330 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-21 18:14:49,500 INFO L231 Difference]: Finished difference. Result has 57 places, 53 transitions, 200 flow [2024-06-21 18:14:49,500 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=124, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=200, PETRI_PLACES=57, PETRI_TRANSITIONS=53} [2024-06-21 18:14:49,501 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 3 predicate places. [2024-06-21 18:14:49,502 INFO L495 AbstractCegarLoop]: Abstraction has has 57 places, 53 transitions, 200 flow [2024-06-21 18:14:49,504 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 20.2) internal successors, (101), 5 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:14:49,504 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:14:49,504 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:14:49,505 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-06-21 18:14:49,505 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 18:14:49,511 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:14:49,511 INFO L85 PathProgramCache]: Analyzing trace with hash -1522984968, now seen corresponding path program 1 times [2024-06-21 18:14:49,511 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:14:49,511 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [404766937] [2024-06-21 18:14:49,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:14:49,512 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:14:49,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:14:49,732 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:14:49,733 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:14:49,733 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [404766937] [2024-06-21 18:14:49,733 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [404766937] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:14:49,733 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:14:49,733 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 18:14:49,733 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1370495454] [2024-06-21 18:14:49,734 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:14:49,734 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 18:14:49,734 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:14:49,734 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 18:14:49,735 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-21 18:14:49,782 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 51 [2024-06-21 18:14:49,783 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 53 transitions, 200 flow. Second operand has 6 states, 6 states have (on average 20.166666666666668) internal successors, (121), 6 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:14:49,783 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:14:49,783 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 51 [2024-06-21 18:14:49,783 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:14:50,295 INFO L124 PetriNetUnfolderBase]: 4373/6453 cut-off events. [2024-06-21 18:14:50,296 INFO L125 PetriNetUnfolderBase]: For 3044/3123 co-relation queries the response was YES. [2024-06-21 18:14:50,308 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16579 conditions, 6453 events. 4373/6453 cut-off events. For 3044/3123 co-relation queries the response was YES. Maximal size of possible extension queue 308. Compared 36299 event pairs, 1831 based on Foata normal form. 32/6476 useless extension candidates. Maximal degree in co-relation 16564. Up to 5973 conditions per place. [2024-06-21 18:14:50,344 INFO L140 encePairwiseOnDemand]: 41/51 looper letters, 61 selfloop transitions, 12 changer transitions 0/84 dead transitions. [2024-06-21 18:14:50,344 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 84 transitions, 430 flow [2024-06-21 18:14:50,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-21 18:14:50,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-21 18:14:50,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 168 transitions. [2024-06-21 18:14:50,348 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6588235294117647 [2024-06-21 18:14:50,348 INFO L175 Difference]: Start difference. First operand has 57 places, 53 transitions, 200 flow. Second operand 5 states and 168 transitions. [2024-06-21 18:14:50,348 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 84 transitions, 430 flow [2024-06-21 18:14:50,351 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 84 transitions, 426 flow, removed 2 selfloop flow, removed 0 redundant places. [2024-06-21 18:14:50,353 INFO L231 Difference]: Finished difference. Result has 61 places, 55 transitions, 246 flow [2024-06-21 18:14:50,354 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=190, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=52, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=246, PETRI_PLACES=61, PETRI_TRANSITIONS=55} [2024-06-21 18:14:50,355 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 7 predicate places. [2024-06-21 18:14:50,355 INFO L495 AbstractCegarLoop]: Abstraction has has 61 places, 55 transitions, 246 flow [2024-06-21 18:14:50,355 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 20.166666666666668) internal successors, (121), 6 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:14:50,355 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:14:50,356 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:14:50,356 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-06-21 18:14:50,356 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 18:14:50,356 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:14:50,356 INFO L85 PathProgramCache]: Analyzing trace with hash 1039655761, now seen corresponding path program 1 times [2024-06-21 18:14:50,357 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:14:50,357 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1053528828] [2024-06-21 18:14:50,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:14:50,357 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:14:50,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:14:50,624 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:14:50,625 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:14:50,628 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1053528828] [2024-06-21 18:14:50,628 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1053528828] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:14:50,628 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:14:50,628 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-21 18:14:50,629 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [273852702] [2024-06-21 18:14:50,629 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:14:50,630 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-21 18:14:50,630 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:14:50,631 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-21 18:14:50,631 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-21 18:14:50,686 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 51 [2024-06-21 18:14:50,687 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 55 transitions, 246 flow. Second operand has 5 states, 5 states have (on average 20.8) internal successors, (104), 5 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:14:50,687 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:14:50,687 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 51 [2024-06-21 18:14:50,687 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:14:51,099 INFO L124 PetriNetUnfolderBase]: 4310/6334 cut-off events. [2024-06-21 18:14:51,100 INFO L125 PetriNetUnfolderBase]: For 5513/5523 co-relation queries the response was YES. [2024-06-21 18:14:51,114 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17797 conditions, 6334 events. 4310/6334 cut-off events. For 5513/5523 co-relation queries the response was YES. Maximal size of possible extension queue 301. Compared 36114 event pairs, 2266 based on Foata normal form. 6/6330 useless extension candidates. Maximal degree in co-relation 17779. Up to 5934 conditions per place. [2024-06-21 18:14:51,141 INFO L140 encePairwiseOnDemand]: 42/51 looper letters, 61 selfloop transitions, 11 changer transitions 0/83 dead transitions. [2024-06-21 18:14:51,141 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 83 transitions, 494 flow [2024-06-21 18:14:51,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-21 18:14:51,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-21 18:14:51,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 134 transitions. [2024-06-21 18:14:51,142 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6568627450980392 [2024-06-21 18:14:51,143 INFO L175 Difference]: Start difference. First operand has 61 places, 55 transitions, 246 flow. Second operand 4 states and 134 transitions. [2024-06-21 18:14:51,143 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 83 transitions, 494 flow [2024-06-21 18:14:51,148 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 83 transitions, 458 flow, removed 5 selfloop flow, removed 3 redundant places. [2024-06-21 18:14:51,149 INFO L231 Difference]: Finished difference. Result has 63 places, 65 transitions, 323 flow [2024-06-21 18:14:51,149 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=216, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=55, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=323, PETRI_PLACES=63, PETRI_TRANSITIONS=65} [2024-06-21 18:14:51,151 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 9 predicate places. [2024-06-21 18:14:51,151 INFO L495 AbstractCegarLoop]: Abstraction has has 63 places, 65 transitions, 323 flow [2024-06-21 18:14:51,151 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 20.8) internal successors, (104), 5 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:14:51,151 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:14:51,151 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:14:51,151 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-06-21 18:14:51,152 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 18:14:51,152 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:14:51,152 INFO L85 PathProgramCache]: Analyzing trace with hash -1795643978, now seen corresponding path program 1 times [2024-06-21 18:14:51,152 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:14:51,153 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [412023064] [2024-06-21 18:14:51,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:14:51,153 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:14:51,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:14:51,374 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:14:51,375 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:14:51,375 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [412023064] [2024-06-21 18:14:51,375 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [412023064] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:14:51,375 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:14:51,375 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 18:14:51,375 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1751891988] [2024-06-21 18:14:51,376 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:14:51,376 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 18:14:51,376 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:14:51,376 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 18:14:51,377 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-21 18:14:51,428 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 51 [2024-06-21 18:14:51,429 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 65 transitions, 323 flow. Second operand has 6 states, 6 states have (on average 20.666666666666668) internal successors, (124), 6 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:14:51,429 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:14:51,429 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 51 [2024-06-21 18:14:51,429 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:14:51,933 INFO L124 PetriNetUnfolderBase]: 5207/7676 cut-off events. [2024-06-21 18:14:51,934 INFO L125 PetriNetUnfolderBase]: For 11019/11281 co-relation queries the response was YES. [2024-06-21 18:14:51,952 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23680 conditions, 7676 events. 5207/7676 cut-off events. For 11019/11281 co-relation queries the response was YES. Maximal size of possible extension queue 363. Compared 44169 event pairs, 2250 based on Foata normal form. 57/7678 useless extension candidates. Maximal degree in co-relation 23660. Up to 7050 conditions per place. [2024-06-21 18:14:51,982 INFO L140 encePairwiseOnDemand]: 41/51 looper letters, 66 selfloop transitions, 25 changer transitions 0/104 dead transitions. [2024-06-21 18:14:51,982 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 104 transitions, 659 flow [2024-06-21 18:14:51,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-21 18:14:51,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-21 18:14:51,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 172 transitions. [2024-06-21 18:14:51,984 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6745098039215687 [2024-06-21 18:14:51,984 INFO L175 Difference]: Start difference. First operand has 63 places, 65 transitions, 323 flow. Second operand 5 states and 172 transitions. [2024-06-21 18:14:51,984 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 104 transitions, 659 flow [2024-06-21 18:14:51,990 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 104 transitions, 651 flow, removed 4 selfloop flow, removed 0 redundant places. [2024-06-21 18:14:51,991 INFO L231 Difference]: Finished difference. Result has 68 places, 73 transitions, 436 flow [2024-06-21 18:14:51,992 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=315, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=65, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=436, PETRI_PLACES=68, PETRI_TRANSITIONS=73} [2024-06-21 18:14:51,992 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 14 predicate places. [2024-06-21 18:14:51,992 INFO L495 AbstractCegarLoop]: Abstraction has has 68 places, 73 transitions, 436 flow [2024-06-21 18:14:51,993 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 20.666666666666668) internal successors, (124), 6 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:14:51,993 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:14:51,993 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:14:51,993 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-06-21 18:14:51,993 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 18:14:51,994 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:14:51,994 INFO L85 PathProgramCache]: Analyzing trace with hash 738796918, now seen corresponding path program 2 times [2024-06-21 18:14:51,994 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:14:51,994 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1076928403] [2024-06-21 18:14:51,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:14:51,994 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:14:52,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:14:52,273 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:14:52,274 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:14:52,274 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1076928403] [2024-06-21 18:14:52,274 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1076928403] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:14:52,274 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:14:52,274 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 18:14:52,275 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1738687149] [2024-06-21 18:14:52,275 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:14:52,275 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 18:14:52,275 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:14:52,276 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 18:14:52,276 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-21 18:14:52,322 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 51 [2024-06-21 18:14:52,323 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 73 transitions, 436 flow. Second operand has 6 states, 6 states have (on average 20.666666666666668) internal successors, (124), 6 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:14:52,323 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:14:52,323 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 51 [2024-06-21 18:14:52,323 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:14:52,902 INFO L124 PetriNetUnfolderBase]: 5198/7664 cut-off events. [2024-06-21 18:14:52,902 INFO L125 PetriNetUnfolderBase]: For 17217/17499 co-relation queries the response was YES. [2024-06-21 18:14:52,924 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26018 conditions, 7664 events. 5198/7664 cut-off events. For 17217/17499 co-relation queries the response was YES. Maximal size of possible extension queue 363. Compared 44083 event pairs, 2250 based on Foata normal form. 65/7676 useless extension candidates. Maximal degree in co-relation 25995. Up to 7056 conditions per place. [2024-06-21 18:14:52,959 INFO L140 encePairwiseOnDemand]: 41/51 looper letters, 60 selfloop transitions, 21 changer transitions 0/94 dead transitions. [2024-06-21 18:14:52,959 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 94 transitions, 652 flow [2024-06-21 18:14:52,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-21 18:14:52,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-21 18:14:52,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 139 transitions. [2024-06-21 18:14:52,961 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6813725490196079 [2024-06-21 18:14:52,961 INFO L175 Difference]: Start difference. First operand has 68 places, 73 transitions, 436 flow. Second operand 4 states and 139 transitions. [2024-06-21 18:14:52,961 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 94 transitions, 652 flow [2024-06-21 18:14:52,975 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 94 transitions, 609 flow, removed 15 selfloop flow, removed 1 redundant places. [2024-06-21 18:14:52,977 INFO L231 Difference]: Finished difference. Result has 71 places, 73 transitions, 453 flow [2024-06-21 18:14:52,977 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=393, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=73, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=453, PETRI_PLACES=71, PETRI_TRANSITIONS=73} [2024-06-21 18:14:52,977 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 17 predicate places. [2024-06-21 18:14:52,978 INFO L495 AbstractCegarLoop]: Abstraction has has 71 places, 73 transitions, 453 flow [2024-06-21 18:14:52,978 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 20.666666666666668) internal successors, (124), 6 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:14:52,978 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:14:52,978 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:14:52,978 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-06-21 18:14:52,978 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 18:14:52,979 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:14:52,979 INFO L85 PathProgramCache]: Analyzing trace with hash 458586734, now seen corresponding path program 1 times [2024-06-21 18:14:52,979 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:14:52,979 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [54049081] [2024-06-21 18:14:52,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:14:52,980 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:14:52,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:14:53,183 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:14:53,184 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:14:53,184 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [54049081] [2024-06-21 18:14:53,184 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [54049081] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:14:53,184 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:14:53,184 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 18:14:53,185 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [413185673] [2024-06-21 18:14:53,185 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:14:53,185 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 18:14:53,185 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:14:53,186 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 18:14:53,186 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-21 18:14:53,225 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 51 [2024-06-21 18:14:53,226 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 73 transitions, 453 flow. Second operand has 6 states, 6 states have (on average 20.666666666666668) internal successors, (124), 6 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:14:53,226 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:14:53,226 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 51 [2024-06-21 18:14:53,226 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:14:53,642 INFO L124 PetriNetUnfolderBase]: 4317/6352 cut-off events. [2024-06-21 18:14:53,643 INFO L125 PetriNetUnfolderBase]: For 15952/15988 co-relation queries the response was YES. [2024-06-21 18:14:53,659 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22022 conditions, 6352 events. 4317/6352 cut-off events. For 15952/15988 co-relation queries the response was YES. Maximal size of possible extension queue 301. Compared 36240 event pairs, 2074 based on Foata normal form. 19/6359 useless extension candidates. Maximal degree in co-relation 21997. Up to 5913 conditions per place. [2024-06-21 18:14:53,684 INFO L140 encePairwiseOnDemand]: 42/51 looper letters, 77 selfloop transitions, 14 changer transitions 0/102 dead transitions. [2024-06-21 18:14:53,685 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 102 transitions, 726 flow [2024-06-21 18:14:53,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-21 18:14:53,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-21 18:14:53,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 164 transitions. [2024-06-21 18:14:53,686 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6431372549019608 [2024-06-21 18:14:53,686 INFO L175 Difference]: Start difference. First operand has 71 places, 73 transitions, 453 flow. Second operand 5 states and 164 transitions. [2024-06-21 18:14:53,686 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 102 transitions, 726 flow [2024-06-21 18:14:53,694 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 102 transitions, 684 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-06-21 18:14:53,696 INFO L231 Difference]: Finished difference. Result has 73 places, 76 transitions, 477 flow [2024-06-21 18:14:53,696 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=411, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=73, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=477, PETRI_PLACES=73, PETRI_TRANSITIONS=76} [2024-06-21 18:14:53,696 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 19 predicate places. [2024-06-21 18:14:53,696 INFO L495 AbstractCegarLoop]: Abstraction has has 73 places, 76 transitions, 477 flow [2024-06-21 18:14:53,697 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 20.666666666666668) internal successors, (124), 6 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:14:53,697 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:14:53,697 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:14:53,697 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-06-21 18:14:53,697 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 18:14:53,697 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:14:53,698 INFO L85 PathProgramCache]: Analyzing trace with hash 1080064308, now seen corresponding path program 1 times [2024-06-21 18:14:53,698 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:14:53,698 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1359055646] [2024-06-21 18:14:53,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:14:53,698 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:14:53,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:14:53,908 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:14:53,909 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:14:53,909 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1359055646] [2024-06-21 18:14:53,909 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1359055646] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:14:53,909 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:14:53,909 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 18:14:53,910 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [266022846] [2024-06-21 18:14:53,910 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:14:53,910 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 18:14:53,910 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:14:53,911 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 18:14:53,911 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-21 18:14:53,971 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 51 [2024-06-21 18:14:53,971 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 76 transitions, 477 flow. Second operand has 7 states, 7 states have (on average 19.571428571428573) internal successors, (137), 7 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:14:53,972 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:14:53,972 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 51 [2024-06-21 18:14:53,972 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:14:54,490 INFO L124 PetriNetUnfolderBase]: 5487/8007 cut-off events. [2024-06-21 18:14:54,491 INFO L125 PetriNetUnfolderBase]: For 24555/24726 co-relation queries the response was YES. [2024-06-21 18:14:54,515 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28817 conditions, 8007 events. 5487/8007 cut-off events. For 24555/24726 co-relation queries the response was YES. Maximal size of possible extension queue 356. Compared 45383 event pairs, 2351 based on Foata normal form. 40/8023 useless extension candidates. Maximal degree in co-relation 28791. Up to 7366 conditions per place. [2024-06-21 18:14:54,549 INFO L140 encePairwiseOnDemand]: 40/51 looper letters, 96 selfloop transitions, 27 changer transitions 0/133 dead transitions. [2024-06-21 18:14:54,550 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 133 transitions, 993 flow [2024-06-21 18:14:54,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 18:14:54,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 18:14:54,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 199 transitions. [2024-06-21 18:14:54,551 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6503267973856209 [2024-06-21 18:14:54,551 INFO L175 Difference]: Start difference. First operand has 73 places, 76 transitions, 477 flow. Second operand 6 states and 199 transitions. [2024-06-21 18:14:54,551 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 133 transitions, 993 flow [2024-06-21 18:14:54,565 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 133 transitions, 953 flow, removed 8 selfloop flow, removed 3 redundant places. [2024-06-21 18:14:54,568 INFO L231 Difference]: Finished difference. Result has 78 places, 93 transitions, 665 flow [2024-06-21 18:14:54,569 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=437, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=76, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=665, PETRI_PLACES=78, PETRI_TRANSITIONS=93} [2024-06-21 18:14:54,570 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 24 predicate places. [2024-06-21 18:14:54,570 INFO L495 AbstractCegarLoop]: Abstraction has has 78 places, 93 transitions, 665 flow [2024-06-21 18:14:54,571 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.571428571428573) internal successors, (137), 7 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:14:54,571 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:14:54,571 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:14:54,571 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-06-21 18:14:54,571 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 18:14:54,572 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:14:54,572 INFO L85 PathProgramCache]: Analyzing trace with hash 1427875008, now seen corresponding path program 2 times [2024-06-21 18:14:54,572 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:14:54,572 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1598133639] [2024-06-21 18:14:54,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:14:54,572 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:14:54,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:14:54,763 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:14:54,763 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:14:54,764 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1598133639] [2024-06-21 18:14:54,764 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1598133639] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:14:54,764 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:14:54,764 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 18:14:54,764 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1763148737] [2024-06-21 18:14:54,764 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:14:54,765 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 18:14:54,765 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:14:54,765 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 18:14:54,766 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-21 18:14:54,806 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 51 [2024-06-21 18:14:54,807 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 93 transitions, 665 flow. Second operand has 7 states, 7 states have (on average 19.571428571428573) internal successors, (137), 7 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:14:54,807 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:14:54,807 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 51 [2024-06-21 18:14:54,807 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:14:55,385 INFO L124 PetriNetUnfolderBase]: 5509/8053 cut-off events. [2024-06-21 18:14:55,386 INFO L125 PetriNetUnfolderBase]: For 32033/32350 co-relation queries the response was YES. [2024-06-21 18:14:55,411 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31088 conditions, 8053 events. 5509/8053 cut-off events. For 32033/32350 co-relation queries the response was YES. Maximal size of possible extension queue 357. Compared 45641 event pairs, 2329 based on Foata normal form. 81/8117 useless extension candidates. Maximal degree in co-relation 31059. Up to 7419 conditions per place. [2024-06-21 18:14:55,446 INFO L140 encePairwiseOnDemand]: 40/51 looper letters, 110 selfloop transitions, 26 changer transitions 0/146 dead transitions. [2024-06-21 18:14:55,446 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 84 places, 146 transitions, 1162 flow [2024-06-21 18:14:55,446 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 18:14:55,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 18:14:55,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 227 transitions. [2024-06-21 18:14:55,447 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6358543417366946 [2024-06-21 18:14:55,447 INFO L175 Difference]: Start difference. First operand has 78 places, 93 transitions, 665 flow. Second operand 7 states and 227 transitions. [2024-06-21 18:14:55,448 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 84 places, 146 transitions, 1162 flow [2024-06-21 18:14:55,468 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 82 places, 146 transitions, 1108 flow, removed 17 selfloop flow, removed 2 redundant places. [2024-06-21 18:14:55,469 INFO L231 Difference]: Finished difference. Result has 84 places, 99 transitions, 741 flow [2024-06-21 18:14:55,470 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=615, PETRI_DIFFERENCE_MINUEND_PLACES=76, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=93, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=72, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=741, PETRI_PLACES=84, PETRI_TRANSITIONS=99} [2024-06-21 18:14:55,471 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 30 predicate places. [2024-06-21 18:14:55,471 INFO L495 AbstractCegarLoop]: Abstraction has has 84 places, 99 transitions, 741 flow [2024-06-21 18:14:55,472 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.571428571428573) internal successors, (137), 7 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:14:55,472 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:14:55,472 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:14:55,472 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-06-21 18:14:55,473 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 18:14:55,473 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:14:55,473 INFO L85 PathProgramCache]: Analyzing trace with hash 1427869428, now seen corresponding path program 3 times [2024-06-21 18:14:55,473 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:14:55,475 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1617249578] [2024-06-21 18:14:55,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:14:55,475 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:14:55,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:14:55,662 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:14:55,662 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:14:55,662 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1617249578] [2024-06-21 18:14:55,663 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1617249578] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:14:55,663 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:14:55,664 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 18:14:55,664 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1321300767] [2024-06-21 18:14:55,664 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:14:55,664 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 18:14:55,665 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:14:55,665 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 18:14:55,665 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-21 18:14:55,713 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 51 [2024-06-21 18:14:55,714 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 84 places, 99 transitions, 741 flow. Second operand has 7 states, 7 states have (on average 19.571428571428573) internal successors, (137), 7 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:14:55,714 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:14:55,714 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 51 [2024-06-21 18:14:55,714 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:14:56,406 INFO L124 PetriNetUnfolderBase]: 5500/8033 cut-off events. [2024-06-21 18:14:56,406 INFO L125 PetriNetUnfolderBase]: For 36437/36676 co-relation queries the response was YES. [2024-06-21 18:14:56,433 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31393 conditions, 8033 events. 5500/8033 cut-off events. For 36437/36676 co-relation queries the response was YES. Maximal size of possible extension queue 356. Compared 45539 event pairs, 2351 based on Foata normal form. 65/8074 useless extension candidates. Maximal degree in co-relation 31362. Up to 7410 conditions per place. [2024-06-21 18:14:56,470 INFO L140 encePairwiseOnDemand]: 40/51 looper letters, 93 selfloop transitions, 25 changer transitions 0/128 dead transitions. [2024-06-21 18:14:56,470 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 88 places, 128 transitions, 1054 flow [2024-06-21 18:14:56,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-21 18:14:56,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-21 18:14:56,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 167 transitions. [2024-06-21 18:14:56,472 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6549019607843137 [2024-06-21 18:14:56,472 INFO L175 Difference]: Start difference. First operand has 84 places, 99 transitions, 741 flow. Second operand 5 states and 167 transitions. [2024-06-21 18:14:56,472 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 88 places, 128 transitions, 1054 flow [2024-06-21 18:14:56,511 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 84 places, 128 transitions, 962 flow, removed 21 selfloop flow, removed 4 redundant places. [2024-06-21 18:14:56,513 INFO L231 Difference]: Finished difference. Result has 85 places, 99 transitions, 710 flow [2024-06-21 18:14:56,513 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=649, PETRI_DIFFERENCE_MINUEND_PLACES=80, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=99, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=74, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=710, PETRI_PLACES=85, PETRI_TRANSITIONS=99} [2024-06-21 18:14:56,513 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 31 predicate places. [2024-06-21 18:14:56,514 INFO L495 AbstractCegarLoop]: Abstraction has has 85 places, 99 transitions, 710 flow [2024-06-21 18:14:56,514 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.571428571428573) internal successors, (137), 7 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:14:56,514 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:14:56,514 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:14:56,514 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-06-21 18:14:56,514 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 18:14:56,515 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:14:56,515 INFO L85 PathProgramCache]: Analyzing trace with hash -763144331, now seen corresponding path program 1 times [2024-06-21 18:14:56,515 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:14:56,515 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [926908367] [2024-06-21 18:14:56,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:14:56,516 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:14:56,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:14:56,702 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:14:56,703 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:14:56,703 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [926908367] [2024-06-21 18:14:56,703 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [926908367] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:14:56,703 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:14:56,703 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 18:14:56,703 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [623758878] [2024-06-21 18:14:56,704 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:14:56,704 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 18:14:56,704 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:14:56,704 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 18:14:56,705 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-06-21 18:14:56,750 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 51 [2024-06-21 18:14:56,751 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 85 places, 99 transitions, 710 flow. Second operand has 6 states, 6 states have (on average 20.166666666666668) internal successors, (121), 6 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:14:56,751 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:14:56,751 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 51 [2024-06-21 18:14:56,751 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:14:57,295 INFO L124 PetriNetUnfolderBase]: 4998/7361 cut-off events. [2024-06-21 18:14:57,295 INFO L125 PetriNetUnfolderBase]: For 40862/40885 co-relation queries the response was YES. [2024-06-21 18:14:57,320 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29609 conditions, 7361 events. 4998/7361 cut-off events. For 40862/40885 co-relation queries the response was YES. Maximal size of possible extension queue 339. Compared 42725 event pairs, 2470 based on Foata normal form. 27/7357 useless extension candidates. Maximal degree in co-relation 29576. Up to 6752 conditions per place. [2024-06-21 18:14:57,351 INFO L140 encePairwiseOnDemand]: 43/51 looper letters, 99 selfloop transitions, 14 changer transitions 0/127 dead transitions. [2024-06-21 18:14:57,351 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 88 places, 127 transitions, 1084 flow [2024-06-21 18:14:57,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-21 18:14:57,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-21 18:14:57,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 127 transitions. [2024-06-21 18:14:57,353 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6225490196078431 [2024-06-21 18:14:57,353 INFO L175 Difference]: Start difference. First operand has 85 places, 99 transitions, 710 flow. Second operand 4 states and 127 transitions. [2024-06-21 18:14:57,353 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 88 places, 127 transitions, 1084 flow [2024-06-21 18:14:57,394 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 84 places, 127 transitions, 1028 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-06-21 18:14:57,396 INFO L231 Difference]: Finished difference. Result has 86 places, 112 transitions, 833 flow [2024-06-21 18:14:57,396 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=660, PETRI_DIFFERENCE_MINUEND_PLACES=81, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=99, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=86, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=833, PETRI_PLACES=86, PETRI_TRANSITIONS=112} [2024-06-21 18:14:57,397 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 32 predicate places. [2024-06-21 18:14:57,397 INFO L495 AbstractCegarLoop]: Abstraction has has 86 places, 112 transitions, 833 flow [2024-06-21 18:14:57,397 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 20.166666666666668) internal successors, (121), 6 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:14:57,397 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:14:57,397 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:14:57,397 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-06-21 18:14:57,398 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 18:14:57,398 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:14:57,398 INFO L85 PathProgramCache]: Analyzing trace with hash 960174645, now seen corresponding path program 1 times [2024-06-21 18:14:57,398 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:14:57,398 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2114988352] [2024-06-21 18:14:57,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:14:57,399 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:14:57,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:14:57,598 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:14:57,598 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:14:57,598 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2114988352] [2024-06-21 18:14:57,598 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2114988352] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:14:57,598 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:14:57,599 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 18:14:57,599 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [659096538] [2024-06-21 18:14:57,599 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:14:57,599 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 18:14:57,599 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:14:57,600 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 18:14:57,600 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-21 18:14:57,674 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 51 [2024-06-21 18:14:57,675 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 112 transitions, 833 flow. Second operand has 7 states, 7 states have (on average 20.571428571428573) internal successors, (144), 7 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:14:57,675 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:14:57,675 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 51 [2024-06-21 18:14:57,675 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:14:58,290 INFO L124 PetriNetUnfolderBase]: 6095/8923 cut-off events. [2024-06-21 18:14:58,291 INFO L125 PetriNetUnfolderBase]: For 64984/65217 co-relation queries the response was YES. [2024-06-21 18:14:58,322 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39578 conditions, 8923 events. 6095/8923 cut-off events. For 64984/65217 co-relation queries the response was YES. Maximal size of possible extension queue 423. Compared 52150 event pairs, 1804 based on Foata normal form. 62/8746 useless extension candidates. Maximal degree in co-relation 39544. Up to 7908 conditions per place. [2024-06-21 18:14:58,360 INFO L140 encePairwiseOnDemand]: 41/51 looper letters, 88 selfloop transitions, 49 changer transitions 0/158 dead transitions. [2024-06-21 18:14:58,360 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 91 places, 158 transitions, 1339 flow [2024-06-21 18:14:58,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 18:14:58,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 18:14:58,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 203 transitions. [2024-06-21 18:14:58,362 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6633986928104575 [2024-06-21 18:14:58,362 INFO L175 Difference]: Start difference. First operand has 86 places, 112 transitions, 833 flow. Second operand 6 states and 203 transitions. [2024-06-21 18:14:58,362 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 91 places, 158 transitions, 1339 flow [2024-06-21 18:14:58,429 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 91 places, 158 transitions, 1329 flow, removed 5 selfloop flow, removed 0 redundant places. [2024-06-21 18:14:58,431 INFO L231 Difference]: Finished difference. Result has 92 places, 118 transitions, 1005 flow [2024-06-21 18:14:58,431 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=823, PETRI_DIFFERENCE_MINUEND_PLACES=86, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=112, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1005, PETRI_PLACES=92, PETRI_TRANSITIONS=118} [2024-06-21 18:14:58,431 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 38 predicate places. [2024-06-21 18:14:58,432 INFO L495 AbstractCegarLoop]: Abstraction has has 92 places, 118 transitions, 1005 flow [2024-06-21 18:14:58,432 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 20.571428571428573) internal successors, (144), 7 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:14:58,432 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:14:58,432 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:14:58,432 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-06-21 18:14:58,432 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 18:14:58,433 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:14:58,433 INFO L85 PathProgramCache]: Analyzing trace with hash -877748299, now seen corresponding path program 2 times [2024-06-21 18:14:58,433 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:14:58,433 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [118978131] [2024-06-21 18:14:58,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:14:58,433 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:14:58,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:14:58,622 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:14:58,623 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:14:58,623 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [118978131] [2024-06-21 18:14:58,623 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [118978131] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:14:58,623 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:14:58,623 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 18:14:58,623 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1269060737] [2024-06-21 18:14:58,624 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:14:58,624 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 18:14:58,624 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:14:58,625 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 18:14:58,625 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-21 18:14:58,683 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 51 [2024-06-21 18:14:58,683 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 92 places, 118 transitions, 1005 flow. Second operand has 7 states, 7 states have (on average 20.571428571428573) internal successors, (144), 7 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:14:58,684 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:14:58,684 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 51 [2024-06-21 18:14:58,684 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:14:59,407 INFO L124 PetriNetUnfolderBase]: 6167/9016 cut-off events. [2024-06-21 18:14:59,407 INFO L125 PetriNetUnfolderBase]: For 82085/82393 co-relation queries the response was YES. [2024-06-21 18:14:59,431 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42538 conditions, 9016 events. 6167/9016 cut-off events. For 82085/82393 co-relation queries the response was YES. Maximal size of possible extension queue 424. Compared 52585 event pairs, 2204 based on Foata normal form. 75/8849 useless extension candidates. Maximal degree in co-relation 42501. Up to 8137 conditions per place. [2024-06-21 18:14:59,466 INFO L140 encePairwiseOnDemand]: 41/51 looper letters, 91 selfloop transitions, 45 changer transitions 0/157 dead transitions. [2024-06-21 18:14:59,466 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 97 places, 157 transitions, 1409 flow [2024-06-21 18:14:59,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 18:14:59,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 18:14:59,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 199 transitions. [2024-06-21 18:14:59,469 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6503267973856209 [2024-06-21 18:14:59,469 INFO L175 Difference]: Start difference. First operand has 92 places, 118 transitions, 1005 flow. Second operand 6 states and 199 transitions. [2024-06-21 18:14:59,469 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 97 places, 157 transitions, 1409 flow [2024-06-21 18:14:59,531 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 95 places, 157 transitions, 1325 flow, removed 18 selfloop flow, removed 2 redundant places. [2024-06-21 18:14:59,533 INFO L231 Difference]: Finished difference. Result has 96 places, 121 transitions, 1068 flow [2024-06-21 18:14:59,533 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=927, PETRI_DIFFERENCE_MINUEND_PLACES=90, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=118, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1068, PETRI_PLACES=96, PETRI_TRANSITIONS=121} [2024-06-21 18:14:59,534 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 42 predicate places. [2024-06-21 18:14:59,534 INFO L495 AbstractCegarLoop]: Abstraction has has 96 places, 121 transitions, 1068 flow [2024-06-21 18:14:59,534 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 20.571428571428573) internal successors, (144), 7 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:14:59,534 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:14:59,534 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:14:59,534 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-06-21 18:14:59,535 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)] === [2024-06-21 18:14:59,535 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:14:59,535 INFO L85 PathProgramCache]: Analyzing trace with hash 1314275829, now seen corresponding path program 3 times [2024-06-21 18:14:59,535 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:14:59,535 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1719146552] [2024-06-21 18:14:59,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:14:59,536 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:14:59,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:14:59,699 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:14:59,699 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:14:59,699 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1719146552] [2024-06-21 18:14:59,699 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1719146552] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:14:59,699 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:14:59,699 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 18:14:59,700 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1934551400] [2024-06-21 18:14:59,700 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:14:59,700 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 18:14:59,700 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:14:59,700 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 18:14:59,701 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-21 18:14:59,761 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 51 [2024-06-21 18:14:59,761 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 96 places, 121 transitions, 1068 flow. Second operand has 7 states, 7 states have (on average 20.571428571428573) internal successors, (144), 7 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:14:59,761 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:14:59,762 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 51 [2024-06-21 18:14:59,762 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:15:00,462 INFO L124 PetriNetUnfolderBase]: 6133/8979 cut-off events. [2024-06-21 18:15:00,462 INFO L125 PetriNetUnfolderBase]: For 89879/90187 co-relation queries the response was YES. [2024-06-21 18:15:00,496 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42958 conditions, 8979 events. 6133/8979 cut-off events. For 89879/90187 co-relation queries the response was YES. Maximal size of possible extension queue 423. Compared 52356 event pairs, 1794 based on Foata normal form. 108/8850 useless extension candidates. Maximal degree in co-relation 42919. Up to 8052 conditions per place. [2024-06-21 18:15:00,535 INFO L140 encePairwiseOnDemand]: 41/51 looper letters, 88 selfloop transitions, 41 changer transitions 0/150 dead transitions. [2024-06-21 18:15:00,535 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 100 places, 150 transitions, 1400 flow [2024-06-21 18:15:00,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-21 18:15:00,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-21 18:15:00,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 170 transitions. [2024-06-21 18:15:00,536 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6666666666666666 [2024-06-21 18:15:00,536 INFO L175 Difference]: Start difference. First operand has 96 places, 121 transitions, 1068 flow. Second operand 5 states and 170 transitions. [2024-06-21 18:15:00,537 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 100 places, 150 transitions, 1400 flow [2024-06-21 18:15:00,621 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 96 places, 150 transitions, 1283 flow, removed 16 selfloop flow, removed 4 redundant places. [2024-06-21 18:15:00,623 INFO L231 Difference]: Finished difference. Result has 97 places, 121 transitions, 1049 flow [2024-06-21 18:15:00,623 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=951, PETRI_DIFFERENCE_MINUEND_PLACES=92, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=121, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=80, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1049, PETRI_PLACES=97, PETRI_TRANSITIONS=121} [2024-06-21 18:15:00,623 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 43 predicate places. [2024-06-21 18:15:00,624 INFO L495 AbstractCegarLoop]: Abstraction has has 97 places, 121 transitions, 1049 flow [2024-06-21 18:15:00,624 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 20.571428571428573) internal successors, (144), 7 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:15:00,624 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:15:00,624 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:15:00,624 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-06-21 18:15:00,624 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 18:15:00,625 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:15:00,625 INFO L85 PathProgramCache]: Analyzing trace with hash -1528957803, now seen corresponding path program 1 times [2024-06-21 18:15:00,625 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:15:00,625 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [337628630] [2024-06-21 18:15:00,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:15:00,625 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:15:00,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:15:00,801 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:15:00,802 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:15:00,802 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [337628630] [2024-06-21 18:15:00,802 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [337628630] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:15:00,802 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:15:00,802 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 18:15:00,802 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [148205713] [2024-06-21 18:15:00,803 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:15:00,803 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 18:15:00,803 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:15:00,803 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 18:15:00,803 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-21 18:15:00,863 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 51 [2024-06-21 18:15:00,863 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 97 places, 121 transitions, 1049 flow. Second operand has 8 states, 8 states have (on average 19.5) internal successors, (156), 8 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:15:00,863 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:15:00,863 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 51 [2024-06-21 18:15:00,864 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:15:01,644 INFO L124 PetriNetUnfolderBase]: 6715/9772 cut-off events. [2024-06-21 18:15:01,644 INFO L125 PetriNetUnfolderBase]: For 95047/95379 co-relation queries the response was YES. [2024-06-21 18:15:01,681 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45970 conditions, 9772 events. 6715/9772 cut-off events. For 95047/95379 co-relation queries the response was YES. Maximal size of possible extension queue 420. Compared 56662 event pairs, 1908 based on Foata normal form. 117/9841 useless extension candidates. Maximal degree in co-relation 45930. Up to 8482 conditions per place. [2024-06-21 18:15:01,720 INFO L140 encePairwiseOnDemand]: 40/51 looper letters, 133 selfloop transitions, 43 changer transitions 0/188 dead transitions. [2024-06-21 18:15:01,720 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 103 places, 188 transitions, 1759 flow [2024-06-21 18:15:01,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 18:15:01,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 18:15:01,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 233 transitions. [2024-06-21 18:15:01,722 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6526610644257703 [2024-06-21 18:15:01,722 INFO L175 Difference]: Start difference. First operand has 97 places, 121 transitions, 1049 flow. Second operand 7 states and 233 transitions. [2024-06-21 18:15:01,722 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 103 places, 188 transitions, 1759 flow [2024-06-21 18:15:01,807 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 99 places, 188 transitions, 1652 flow, removed 5 selfloop flow, removed 4 redundant places. [2024-06-21 18:15:01,809 INFO L231 Difference]: Finished difference. Result has 102 places, 132 transitions, 1189 flow [2024-06-21 18:15:01,809 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=956, PETRI_DIFFERENCE_MINUEND_PLACES=93, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=121, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=81, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1189, PETRI_PLACES=102, PETRI_TRANSITIONS=132} [2024-06-21 18:15:01,810 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 48 predicate places. [2024-06-21 18:15:01,810 INFO L495 AbstractCegarLoop]: Abstraction has has 102 places, 132 transitions, 1189 flow [2024-06-21 18:15:01,810 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 19.5) internal successors, (156), 8 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:15:01,810 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:15:01,810 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:15:01,810 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-06-21 18:15:01,811 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 18:15:01,811 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:15:01,811 INFO L85 PathProgramCache]: Analyzing trace with hash -1440392043, now seen corresponding path program 2 times [2024-06-21 18:15:01,811 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:15:01,811 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [169522348] [2024-06-21 18:15:01,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:15:01,812 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:15:01,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:15:01,970 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:15:01,971 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:15:01,971 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [169522348] [2024-06-21 18:15:01,972 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [169522348] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:15:01,972 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:15:01,972 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 18:15:01,974 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1352240621] [2024-06-21 18:15:01,974 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:15:01,974 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 18:15:01,975 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:15:01,975 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 18:15:01,975 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-21 18:15:02,043 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 51 [2024-06-21 18:15:02,043 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 102 places, 132 transitions, 1189 flow. Second operand has 8 states, 8 states have (on average 19.5) internal successors, (156), 8 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:15:02,043 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:15:02,043 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 51 [2024-06-21 18:15:02,043 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:15:02,882 INFO L124 PetriNetUnfolderBase]: 6989/10198 cut-off events. [2024-06-21 18:15:02,883 INFO L125 PetriNetUnfolderBase]: For 112737/113129 co-relation queries the response was YES. [2024-06-21 18:15:02,919 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49943 conditions, 10198 events. 6989/10198 cut-off events. For 112737/113129 co-relation queries the response was YES. Maximal size of possible extension queue 432. Compared 59632 event pairs, 2353 based on Foata normal form. 127/10277 useless extension candidates. Maximal degree in co-relation 49900. Up to 9096 conditions per place. [2024-06-21 18:15:02,960 INFO L140 encePairwiseOnDemand]: 40/51 looper letters, 139 selfloop transitions, 39 changer transitions 0/190 dead transitions. [2024-06-21 18:15:02,960 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 108 places, 190 transitions, 1845 flow [2024-06-21 18:15:02,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 18:15:02,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 18:15:02,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 233 transitions. [2024-06-21 18:15:02,961 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6526610644257703 [2024-06-21 18:15:02,961 INFO L175 Difference]: Start difference. First operand has 102 places, 132 transitions, 1189 flow. Second operand 7 states and 233 transitions. [2024-06-21 18:15:02,961 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 108 places, 190 transitions, 1845 flow [2024-06-21 18:15:03,056 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 106 places, 190 transitions, 1786 flow, removed 11 selfloop flow, removed 2 redundant places. [2024-06-21 18:15:03,058 INFO L231 Difference]: Finished difference. Result has 108 places, 137 transitions, 1295 flow [2024-06-21 18:15:03,059 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=1130, PETRI_DIFFERENCE_MINUEND_PLACES=100, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=132, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=95, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1295, PETRI_PLACES=108, PETRI_TRANSITIONS=137} [2024-06-21 18:15:03,059 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 54 predicate places. [2024-06-21 18:15:03,059 INFO L495 AbstractCegarLoop]: Abstraction has has 108 places, 137 transitions, 1295 flow [2024-06-21 18:15:03,059 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 19.5) internal successors, (156), 8 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:15:03,059 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:15:03,060 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:15:03,060 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-06-21 18:15:03,060 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 18:15:03,060 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:15:03,060 INFO L85 PathProgramCache]: Analyzing trace with hash -1440244173, now seen corresponding path program 3 times [2024-06-21 18:15:03,060 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:15:03,061 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [827698398] [2024-06-21 18:15:03,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:15:03,061 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:15:03,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:15:03,215 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:15:03,216 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:15:03,216 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [827698398] [2024-06-21 18:15:03,216 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [827698398] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:15:03,216 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:15:03,216 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 18:15:03,216 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1593458945] [2024-06-21 18:15:03,217 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:15:03,217 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 18:15:03,217 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:15:03,218 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 18:15:03,218 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-21 18:15:03,257 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 51 [2024-06-21 18:15:03,257 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 108 places, 137 transitions, 1295 flow. Second operand has 8 states, 8 states have (on average 19.5) internal successors, (156), 8 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:15:03,258 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:15:03,258 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 51 [2024-06-21 18:15:03,258 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:15:04,158 INFO L124 PetriNetUnfolderBase]: 6935/10120 cut-off events. [2024-06-21 18:15:04,159 INFO L125 PetriNetUnfolderBase]: For 122427/122821 co-relation queries the response was YES. [2024-06-21 18:15:04,193 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50414 conditions, 10120 events. 6935/10120 cut-off events. For 122427/122821 co-relation queries the response was YES. Maximal size of possible extension queue 429. Compared 59132 event pairs, 2358 based on Foata normal form. 133/10205 useless extension candidates. Maximal degree in co-relation 50368. Up to 9216 conditions per place. [2024-06-21 18:15:04,233 INFO L140 encePairwiseOnDemand]: 40/51 looper letters, 137 selfloop transitions, 36 changer transitions 0/185 dead transitions. [2024-06-21 18:15:04,233 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 114 places, 185 transitions, 1784 flow [2024-06-21 18:15:04,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 18:15:04,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 18:15:04,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 227 transitions. [2024-06-21 18:15:04,234 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6358543417366946 [2024-06-21 18:15:04,234 INFO L175 Difference]: Start difference. First operand has 108 places, 137 transitions, 1295 flow. Second operand 7 states and 227 transitions. [2024-06-21 18:15:04,234 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 114 places, 185 transitions, 1784 flow [2024-06-21 18:15:04,354 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 111 places, 185 transitions, 1715 flow, removed 15 selfloop flow, removed 3 redundant places. [2024-06-21 18:15:04,356 INFO L231 Difference]: Finished difference. Result has 112 places, 138 transitions, 1322 flow [2024-06-21 18:15:04,356 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=1228, PETRI_DIFFERENCE_MINUEND_PLACES=105, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=137, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=101, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1322, PETRI_PLACES=112, PETRI_TRANSITIONS=138} [2024-06-21 18:15:04,357 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 58 predicate places. [2024-06-21 18:15:04,357 INFO L495 AbstractCegarLoop]: Abstraction has has 112 places, 138 transitions, 1322 flow [2024-06-21 18:15:04,357 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 19.5) internal successors, (156), 8 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:15:04,357 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:15:04,357 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:15:04,357 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-06-21 18:15:04,357 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 18:15:04,357 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:15:04,358 INFO L85 PathProgramCache]: Analyzing trace with hash 2093356735, now seen corresponding path program 4 times [2024-06-21 18:15:04,358 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:15:04,358 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [901400581] [2024-06-21 18:15:04,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:15:04,358 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:15:04,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:15:04,524 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:15:04,524 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:15:04,524 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [901400581] [2024-06-21 18:15:04,524 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [901400581] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:15:04,524 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:15:04,524 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 18:15:04,524 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [218764543] [2024-06-21 18:15:04,525 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:15:04,525 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 18:15:04,525 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:15:04,526 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 18:15:04,526 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-21 18:15:04,588 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 51 [2024-06-21 18:15:04,589 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 112 places, 138 transitions, 1322 flow. Second operand has 8 states, 8 states have (on average 19.5) internal successors, (156), 8 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:15:04,589 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:15:04,589 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 51 [2024-06-21 18:15:04,589 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:15:05,522 INFO L124 PetriNetUnfolderBase]: 6968/10191 cut-off events. [2024-06-21 18:15:05,522 INFO L125 PetriNetUnfolderBase]: For 131098/131500 co-relation queries the response was YES. [2024-06-21 18:15:05,555 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51080 conditions, 10191 events. 6968/10191 cut-off events. For 131098/131500 co-relation queries the response was YES. Maximal size of possible extension queue 424. Compared 59592 event pairs, 2338 based on Foata normal form. 142/10295 useless extension candidates. Maximal degree in co-relation 51032. Up to 9310 conditions per place. [2024-06-21 18:15:05,596 INFO L140 encePairwiseOnDemand]: 40/51 looper letters, 152 selfloop transitions, 31 changer transitions 0/195 dead transitions. [2024-06-21 18:15:05,597 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 119 places, 195 transitions, 1873 flow [2024-06-21 18:15:05,598 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 18:15:05,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 18:15:05,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 255 transitions. [2024-06-21 18:15:05,599 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.625 [2024-06-21 18:15:05,599 INFO L175 Difference]: Start difference. First operand has 112 places, 138 transitions, 1322 flow. Second operand 8 states and 255 transitions. [2024-06-21 18:15:05,599 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 119 places, 195 transitions, 1873 flow [2024-06-21 18:15:05,723 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 114 places, 195 transitions, 1801 flow, removed 2 selfloop flow, removed 5 redundant places. [2024-06-21 18:15:05,725 INFO L231 Difference]: Finished difference. Result has 115 places, 140 transitions, 1360 flow [2024-06-21 18:15:05,725 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=1250, PETRI_DIFFERENCE_MINUEND_PLACES=107, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=138, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=107, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1360, PETRI_PLACES=115, PETRI_TRANSITIONS=140} [2024-06-21 18:15:05,726 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 61 predicate places. [2024-06-21 18:15:05,726 INFO L495 AbstractCegarLoop]: Abstraction has has 115 places, 140 transitions, 1360 flow [2024-06-21 18:15:05,726 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 19.5) internal successors, (156), 8 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:15:05,726 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:15:05,726 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:15:05,726 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-06-21 18:15:05,727 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 18:15:05,727 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:15:05,727 INFO L85 PathProgramCache]: Analyzing trace with hash 2087994355, now seen corresponding path program 5 times [2024-06-21 18:15:05,727 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:15:05,727 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1521275458] [2024-06-21 18:15:05,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:15:05,728 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:15:05,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:15:05,906 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:15:05,907 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:15:05,907 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1521275458] [2024-06-21 18:15:05,907 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1521275458] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:15:05,907 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:15:05,907 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 18:15:05,909 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1918230105] [2024-06-21 18:15:05,909 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:15:05,910 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 18:15:05,910 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:15:05,911 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 18:15:05,911 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-21 18:15:05,952 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 51 [2024-06-21 18:15:05,952 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 115 places, 140 transitions, 1360 flow. Second operand has 8 states, 8 states have (on average 19.5) internal successors, (156), 8 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:15:05,952 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:15:05,953 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 51 [2024-06-21 18:15:05,953 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:15:06,995 INFO L124 PetriNetUnfolderBase]: 7114/10415 cut-off events. [2024-06-21 18:15:06,995 INFO L125 PetriNetUnfolderBase]: For 145189/145583 co-relation queries the response was YES. [2024-06-21 18:15:07,048 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53030 conditions, 10415 events. 7114/10415 cut-off events. For 145189/145583 co-relation queries the response was YES. Maximal size of possible extension queue 432. Compared 61207 event pairs, 2394 based on Foata normal form. 127/10496 useless extension candidates. Maximal degree in co-relation 52981. Up to 9523 conditions per place. [2024-06-21 18:15:07,098 INFO L140 encePairwiseOnDemand]: 40/51 looper letters, 141 selfloop transitions, 29 changer transitions 0/182 dead transitions. [2024-06-21 18:15:07,098 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 120 places, 182 transitions, 1851 flow [2024-06-21 18:15:07,099 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 18:15:07,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 18:15:07,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 198 transitions. [2024-06-21 18:15:07,100 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6470588235294118 [2024-06-21 18:15:07,100 INFO L175 Difference]: Start difference. First operand has 115 places, 140 transitions, 1360 flow. Second operand 6 states and 198 transitions. [2024-06-21 18:15:07,100 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 120 places, 182 transitions, 1851 flow [2024-06-21 18:15:07,267 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 114 places, 182 transitions, 1779 flow, removed 7 selfloop flow, removed 6 redundant places. [2024-06-21 18:15:07,269 INFO L231 Difference]: Finished difference. Result has 115 places, 142 transitions, 1398 flow [2024-06-21 18:15:07,269 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=1288, PETRI_DIFFERENCE_MINUEND_PLACES=109, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=140, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=111, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1398, PETRI_PLACES=115, PETRI_TRANSITIONS=142} [2024-06-21 18:15:07,269 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 61 predicate places. [2024-06-21 18:15:07,270 INFO L495 AbstractCegarLoop]: Abstraction has has 115 places, 142 transitions, 1398 flow [2024-06-21 18:15:07,270 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 19.5) internal successors, (156), 8 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:15:07,270 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:15:07,270 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:15:07,270 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-06-21 18:15:07,270 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 18:15:07,270 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:15:07,270 INFO L85 PathProgramCache]: Analyzing trace with hash 2087846485, now seen corresponding path program 6 times [2024-06-21 18:15:07,271 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:15:07,271 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [67345442] [2024-06-21 18:15:07,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:15:07,271 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:15:07,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:15:07,451 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:15:07,452 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:15:07,452 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [67345442] [2024-06-21 18:15:07,452 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [67345442] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:15:07,452 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:15:07,452 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 18:15:07,452 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [373817084] [2024-06-21 18:15:07,452 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:15:07,453 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 18:15:07,455 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:15:07,455 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 18:15:07,455 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-21 18:15:07,538 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 51 [2024-06-21 18:15:07,539 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 115 places, 142 transitions, 1398 flow. Second operand has 8 states, 8 states have (on average 19.5) internal successors, (156), 8 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:15:07,539 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:15:07,539 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 51 [2024-06-21 18:15:07,540 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:15:08,581 INFO L124 PetriNetUnfolderBase]: 7075/10354 cut-off events. [2024-06-21 18:15:08,581 INFO L125 PetriNetUnfolderBase]: For 152734/153124 co-relation queries the response was YES. [2024-06-21 18:15:08,613 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52976 conditions, 10354 events. 7075/10354 cut-off events. For 152734/153124 co-relation queries the response was YES. Maximal size of possible extension queue 428. Compared 60691 event pairs, 1958 based on Foata normal form. 141/10449 useless extension candidates. Maximal degree in co-relation 52926. Up to 9116 conditions per place. [2024-06-21 18:15:08,650 INFO L140 encePairwiseOnDemand]: 40/51 looper letters, 138 selfloop transitions, 37 changer transitions 0/187 dead transitions. [2024-06-21 18:15:08,650 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 120 places, 187 transitions, 1891 flow [2024-06-21 18:15:08,651 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 18:15:08,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 18:15:08,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 201 transitions. [2024-06-21 18:15:08,651 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6568627450980392 [2024-06-21 18:15:08,652 INFO L175 Difference]: Start difference. First operand has 115 places, 142 transitions, 1398 flow. Second operand 6 states and 201 transitions. [2024-06-21 18:15:08,652 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 120 places, 187 transitions, 1891 flow [2024-06-21 18:15:08,808 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 116 places, 187 transitions, 1809 flow, removed 14 selfloop flow, removed 4 redundant places. [2024-06-21 18:15:08,810 INFO L231 Difference]: Finished difference. Result has 118 places, 144 transitions, 1436 flow [2024-06-21 18:15:08,810 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=1318, PETRI_DIFFERENCE_MINUEND_PLACES=111, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=142, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=106, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1436, PETRI_PLACES=118, PETRI_TRANSITIONS=144} [2024-06-21 18:15:08,811 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 64 predicate places. [2024-06-21 18:15:08,811 INFO L495 AbstractCegarLoop]: Abstraction has has 118 places, 144 transitions, 1436 flow [2024-06-21 18:15:08,811 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 19.5) internal successors, (156), 8 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:15:08,811 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:15:08,811 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:15:08,811 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-06-21 18:15:08,811 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 18:15:08,811 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:15:08,812 INFO L85 PathProgramCache]: Analyzing trace with hash 2093571937, now seen corresponding path program 1 times [2024-06-21 18:15:08,812 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:15:08,812 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1041772879] [2024-06-21 18:15:08,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:15:08,812 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:15:08,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:15:09,001 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:15:09,002 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:15:09,002 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1041772879] [2024-06-21 18:15:09,002 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1041772879] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:15:09,002 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:15:09,002 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 18:15:09,002 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1231852628] [2024-06-21 18:15:09,002 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:15:09,003 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 18:15:09,003 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:15:09,003 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 18:15:09,003 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-21 18:15:09,072 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 51 [2024-06-21 18:15:09,073 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 118 places, 144 transitions, 1436 flow. Second operand has 8 states, 8 states have (on average 19.5) internal successors, (156), 8 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:15:09,073 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:15:09,073 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 51 [2024-06-21 18:15:09,073 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:15:10,023 INFO L124 PetriNetUnfolderBase]: 6967/10208 cut-off events. [2024-06-21 18:15:10,024 INFO L125 PetriNetUnfolderBase]: For 159681/160061 co-relation queries the response was YES. [2024-06-21 18:15:10,072 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52527 conditions, 10208 events. 6967/10208 cut-off events. For 159681/160061 co-relation queries the response was YES. Maximal size of possible extension queue 419. Compared 59792 event pairs, 2179 based on Foata normal form. 144/10314 useless extension candidates. Maximal degree in co-relation 52475. Up to 8973 conditions per place. [2024-06-21 18:15:10,114 INFO L140 encePairwiseOnDemand]: 40/51 looper letters, 154 selfloop transitions, 38 changer transitions 0/204 dead transitions. [2024-06-21 18:15:10,115 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 124 places, 204 transitions, 1973 flow [2024-06-21 18:15:10,120 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 18:15:10,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 18:15:10,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 257 transitions. [2024-06-21 18:15:10,121 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6299019607843137 [2024-06-21 18:15:10,121 INFO L175 Difference]: Start difference. First operand has 118 places, 144 transitions, 1436 flow. Second operand 8 states and 257 transitions. [2024-06-21 18:15:10,121 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 124 places, 204 transitions, 1973 flow [2024-06-21 18:15:10,331 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 119 places, 204 transitions, 1838 flow, removed 12 selfloop flow, removed 5 redundant places. [2024-06-21 18:15:10,333 INFO L231 Difference]: Finished difference. Result has 120 places, 145 transitions, 1376 flow [2024-06-21 18:15:10,333 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=1261, PETRI_DIFFERENCE_MINUEND_PLACES=112, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=143, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=105, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1376, PETRI_PLACES=120, PETRI_TRANSITIONS=145} [2024-06-21 18:15:10,333 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 66 predicate places. [2024-06-21 18:15:10,333 INFO L495 AbstractCegarLoop]: Abstraction has has 120 places, 145 transitions, 1376 flow [2024-06-21 18:15:10,334 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 19.5) internal successors, (156), 8 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:15:10,334 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:15:10,334 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:15:10,334 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-06-21 18:15:10,334 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 18:15:10,334 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:15:10,334 INFO L85 PathProgramCache]: Analyzing trace with hash -241083464, now seen corresponding path program 1 times [2024-06-21 18:15:10,334 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:15:10,334 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [521271861] [2024-06-21 18:15:10,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:15:10,335 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:15:10,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:15:10,507 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:15:10,507 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:15:10,507 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [521271861] [2024-06-21 18:15:10,508 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [521271861] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:15:10,508 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:15:10,508 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 18:15:10,508 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [796103485] [2024-06-21 18:15:10,508 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:15:10,508 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 18:15:10,509 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:15:10,509 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 18:15:10,509 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-21 18:15:10,563 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 51 [2024-06-21 18:15:10,563 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 120 places, 145 transitions, 1376 flow. Second operand has 6 states, 6 states have (on average 21.166666666666668) internal successors, (127), 6 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:15:10,563 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:15:10,563 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 51 [2024-06-21 18:15:10,563 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:15:11,338 INFO L124 PetriNetUnfolderBase]: 5676/8380 cut-off events. [2024-06-21 18:15:11,338 INFO L125 PetriNetUnfolderBase]: For 138700/138966 co-relation queries the response was YES. [2024-06-21 18:15:11,365 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44542 conditions, 8380 events. 5676/8380 cut-off events. For 138700/138966 co-relation queries the response was YES. Maximal size of possible extension queue 362. Compared 49183 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. [2024-06-21 18:15:11,396 INFO L140 encePairwiseOnDemand]: 42/51 looper letters, 130 selfloop transitions, 33 changer transitions 0/176 dead transitions. [2024-06-21 18:15:11,397 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 124 places, 176 transitions, 1944 flow [2024-06-21 18:15:11,397 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-21 18:15:11,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-21 18:15:11,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 163 transitions. [2024-06-21 18:15:11,398 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6392156862745098 [2024-06-21 18:15:11,398 INFO L175 Difference]: Start difference. First operand has 120 places, 145 transitions, 1376 flow. Second operand 5 states and 163 transitions. [2024-06-21 18:15:11,398 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 124 places, 176 transitions, 1944 flow [2024-06-21 18:15:11,498 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 118 places, 176 transitions, 1855 flow, removed 8 selfloop flow, removed 6 redundant places. [2024-06-21 18:15:11,500 INFO L231 Difference]: Finished difference. Result has 119 places, 153 transitions, 1470 flow [2024-06-21 18:15:11,500 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=1287, PETRI_DIFFERENCE_MINUEND_PLACES=114, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=145, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=116, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1470, PETRI_PLACES=119, PETRI_TRANSITIONS=153} [2024-06-21 18:15:11,500 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 65 predicate places. [2024-06-21 18:15:11,500 INFO L495 AbstractCegarLoop]: Abstraction has has 119 places, 153 transitions, 1470 flow [2024-06-21 18:15:11,501 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 21.166666666666668) internal successors, (127), 6 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:15:11,501 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:15:11,501 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:15:11,501 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-06-21 18:15:11,501 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 18:15:11,501 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:15:11,501 INFO L85 PathProgramCache]: Analyzing trace with hash -210490184, now seen corresponding path program 2 times [2024-06-21 18:15:11,501 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:15:11,501 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [723320901] [2024-06-21 18:15:11,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:15:11,502 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:15:11,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:15:11,645 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:15:11,646 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:15:11,646 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [723320901] [2024-06-21 18:15:11,646 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [723320901] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:15:11,646 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:15:11,646 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 18:15:11,647 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1907795000] [2024-06-21 18:15:11,647 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:15:11,649 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 18:15:11,649 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:15:11,649 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 18:15:11,649 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-21 18:15:11,677 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 51 [2024-06-21 18:15:11,678 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 119 places, 153 transitions, 1470 flow. Second operand has 6 states, 6 states have (on average 21.166666666666668) internal successors, (127), 6 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:15:11,678 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:15:11,678 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 51 [2024-06-21 18:15:11,678 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:15:12,392 INFO L124 PetriNetUnfolderBase]: 5669/8371 cut-off events. [2024-06-21 18:15:12,392 INFO L125 PetriNetUnfolderBase]: For 154222/154504 co-relation queries the response was YES. [2024-06-21 18:15:12,432 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46122 conditions, 8371 events. 5669/8371 cut-off events. For 154222/154504 co-relation queries the response was YES. Maximal size of possible extension queue 362. Compared 49074 event pairs, 2029 based on Foata normal form. 34/8380 useless extension candidates. Maximal degree in co-relation 46069. Up to 7826 conditions per place. [2024-06-21 18:15:12,469 INFO L140 encePairwiseOnDemand]: 42/51 looper letters, 128 selfloop transitions, 29 changer transitions 0/170 dead transitions. [2024-06-21 18:15:12,469 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 122 places, 170 transitions, 1828 flow [2024-06-21 18:15:12,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-21 18:15:12,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-21 18:15:12,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 134 transitions. [2024-06-21 18:15:12,470 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6568627450980392 [2024-06-21 18:15:12,470 INFO L175 Difference]: Start difference. First operand has 119 places, 153 transitions, 1470 flow. Second operand 4 states and 134 transitions. [2024-06-21 18:15:12,470 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 122 places, 170 transitions, 1828 flow [2024-06-21 18:15:12,626 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 121 places, 170 transitions, 1735 flow, removed 36 selfloop flow, removed 1 redundant places. [2024-06-21 18:15:12,628 INFO L231 Difference]: Finished difference. Result has 122 places, 153 transitions, 1451 flow [2024-06-21 18:15:12,628 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=1377, PETRI_DIFFERENCE_MINUEND_PLACES=118, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=153, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=124, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=1451, PETRI_PLACES=122, PETRI_TRANSITIONS=153} [2024-06-21 18:15:12,628 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 68 predicate places. [2024-06-21 18:15:12,628 INFO L495 AbstractCegarLoop]: Abstraction has has 122 places, 153 transitions, 1451 flow [2024-06-21 18:15:12,628 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 21.166666666666668) internal successors, (127), 6 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:15:12,628 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:15:12,628 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:15:12,629 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-06-21 18:15:12,629 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 18:15:12,629 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:15:12,629 INFO L85 PathProgramCache]: Analyzing trace with hash 1999758960, now seen corresponding path program 1 times [2024-06-21 18:15:12,629 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:15:12,629 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [921213858] [2024-06-21 18:15:12,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:15:12,629 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:15:12,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:15:12,803 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:15:12,803 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:15:12,803 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [921213858] [2024-06-21 18:15:12,803 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [921213858] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:15:12,803 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:15:12,804 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 18:15:12,804 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1831315303] [2024-06-21 18:15:12,809 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:15:12,810 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 18:15:12,810 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:15:12,810 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 18:15:12,814 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-21 18:15:12,899 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 51 [2024-06-21 18:15:12,899 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 122 places, 153 transitions, 1451 flow. Second operand has 6 states, 6 states have (on average 21.166666666666668) internal successors, (127), 6 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:15:12,899 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:15:12,899 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 51 [2024-06-21 18:15:12,899 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:15:13,613 INFO L124 PetriNetUnfolderBase]: 5840/8643 cut-off events. [2024-06-21 18:15:13,614 INFO L125 PetriNetUnfolderBase]: For 160538/160593 co-relation queries the response was YES. [2024-06-21 18:15:13,652 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45627 conditions, 8643 events. 5840/8643 cut-off events. For 160538/160593 co-relation queries the response was YES. Maximal size of possible extension queue 391. Compared 51407 event pairs, 2282 based on Foata normal form. 63/8679 useless extension candidates. Maximal degree in co-relation 45572. Up to 7977 conditions per place. [2024-06-21 18:15:13,686 INFO L140 encePairwiseOnDemand]: 43/51 looper letters, 143 selfloop transitions, 17 changer transitions 0/176 dead transitions. [2024-06-21 18:15:13,687 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 126 places, 176 transitions, 1851 flow [2024-06-21 18:15:13,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-21 18:15:13,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-21 18:15:13,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 156 transitions. [2024-06-21 18:15:13,688 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.611764705882353 [2024-06-21 18:15:13,688 INFO L175 Difference]: Start difference. First operand has 122 places, 153 transitions, 1451 flow. Second operand 5 states and 156 transitions. [2024-06-21 18:15:13,688 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 126 places, 176 transitions, 1851 flow [2024-06-21 18:15:13,844 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 123 places, 176 transitions, 1793 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-06-21 18:15:13,846 INFO L231 Difference]: Finished difference. Result has 124 places, 156 transitions, 1467 flow [2024-06-21 18:15:13,846 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=1393, PETRI_DIFFERENCE_MINUEND_PLACES=119, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=153, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=136, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1467, PETRI_PLACES=124, PETRI_TRANSITIONS=156} [2024-06-21 18:15:13,847 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 70 predicate places. [2024-06-21 18:15:13,847 INFO L495 AbstractCegarLoop]: Abstraction has has 124 places, 156 transitions, 1467 flow [2024-06-21 18:15:13,847 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 21.166666666666668) internal successors, (127), 6 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:15:13,847 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:15:13,847 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:15:13,847 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-06-21 18:15:13,848 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 18:15:13,848 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:15:13,848 INFO L85 PathProgramCache]: Analyzing trace with hash -2144125132, now seen corresponding path program 1 times [2024-06-21 18:15:13,848 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:15:13,848 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1037334858] [2024-06-21 18:15:13,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:15:13,849 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:15:13,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:15:14,062 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:15:14,062 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:15:14,062 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1037334858] [2024-06-21 18:15:14,062 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1037334858] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:15:14,062 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:15:14,062 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 18:15:14,063 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1956661790] [2024-06-21 18:15:14,063 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:15:14,063 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 18:15:14,063 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:15:14,063 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 18:15:14,063 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-21 18:15:14,110 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 51 [2024-06-21 18:15:14,110 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 124 places, 156 transitions, 1467 flow. Second operand has 8 states, 8 states have (on average 17.875) internal successors, (143), 8 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:15:14,110 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:15:14,110 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 51 [2024-06-21 18:15:14,110 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:15:15,048 INFO L124 PetriNetUnfolderBase]: 7463/10908 cut-off events. [2024-06-21 18:15:15,048 INFO L125 PetriNetUnfolderBase]: For 207788/207798 co-relation queries the response was YES. [2024-06-21 18:15:15,096 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57861 conditions, 10908 events. 7463/10908 cut-off events. For 207788/207798 co-relation queries the response was YES. Maximal size of possible extension queue 441. Compared 63695 event pairs, 2649 based on Foata normal form. 10/10913 useless extension candidates. Maximal degree in co-relation 57804. Up to 10181 conditions per place. [2024-06-21 18:15:15,139 INFO L140 encePairwiseOnDemand]: 41/51 looper letters, 178 selfloop transitions, 26 changer transitions 0/212 dead transitions. [2024-06-21 18:15:15,140 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 129 places, 212 transitions, 2257 flow [2024-06-21 18:15:15,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 18:15:15,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 18:15:15,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 180 transitions. [2024-06-21 18:15:15,141 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5882352941176471 [2024-06-21 18:15:15,141 INFO L175 Difference]: Start difference. First operand has 124 places, 156 transitions, 1467 flow. Second operand 6 states and 180 transitions. [2024-06-21 18:15:15,141 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 129 places, 212 transitions, 2257 flow [2024-06-21 18:15:15,395 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 126 places, 212 transitions, 2200 flow, removed 10 selfloop flow, removed 3 redundant places. [2024-06-21 18:15:15,397 INFO L231 Difference]: Finished difference. Result has 130 places, 179 transitions, 1720 flow [2024-06-21 18:15:15,397 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=1417, PETRI_DIFFERENCE_MINUEND_PLACES=121, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=156, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=138, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1720, PETRI_PLACES=130, PETRI_TRANSITIONS=179} [2024-06-21 18:15:15,398 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 76 predicate places. [2024-06-21 18:15:15,398 INFO L495 AbstractCegarLoop]: Abstraction has has 130 places, 179 transitions, 1720 flow [2024-06-21 18:15:15,398 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 17.875) internal successors, (143), 8 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:15:15,398 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:15:15,398 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:15:15,398 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-06-21 18:15:15,399 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 18:15:15,399 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:15:15,399 INFO L85 PathProgramCache]: Analyzing trace with hash 3712110, now seen corresponding path program 2 times [2024-06-21 18:15:15,399 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:15:15,399 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2087135144] [2024-06-21 18:15:15,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:15:15,399 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:15:15,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:15:15,573 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:15:15,573 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:15:15,573 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2087135144] [2024-06-21 18:15:15,573 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2087135144] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:15:15,573 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:15:15,574 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 18:15:15,574 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [472265038] [2024-06-21 18:15:15,574 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:15:15,575 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 18:15:15,575 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:15:15,575 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 18:15:15,575 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-21 18:15:15,609 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 51 [2024-06-21 18:15:15,609 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 130 places, 179 transitions, 1720 flow. Second operand has 7 states, 7 states have (on average 19.0) internal successors, (133), 7 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:15:15,609 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:15:15,610 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 51 [2024-06-21 18:15:15,610 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:15:16,546 INFO L124 PetriNetUnfolderBase]: 7479/10932 cut-off events. [2024-06-21 18:15:16,546 INFO L125 PetriNetUnfolderBase]: For 226161/226177 co-relation queries the response was YES. [2024-06-21 18:15:16,605 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60283 conditions, 10932 events. 7479/10932 cut-off events. For 226161/226177 co-relation queries the response was YES. Maximal size of possible extension queue 441. Compared 63825 event pairs, 2654 based on Foata normal form. 9/10937 useless extension candidates. Maximal degree in co-relation 60223. Up to 10198 conditions per place. [2024-06-21 18:15:16,655 INFO L140 encePairwiseOnDemand]: 42/51 looper letters, 169 selfloop transitions, 30 changer transitions 0/208 dead transitions. [2024-06-21 18:15:16,655 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 134 places, 208 transitions, 2334 flow [2024-06-21 18:15:16,655 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-21 18:15:16,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-21 18:15:16,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 154 transitions. [2024-06-21 18:15:16,656 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6039215686274509 [2024-06-21 18:15:16,656 INFO L175 Difference]: Start difference. First operand has 130 places, 179 transitions, 1720 flow. Second operand 5 states and 154 transitions. [2024-06-21 18:15:16,656 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 134 places, 208 transitions, 2334 flow [2024-06-21 18:15:17,014 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 134 places, 208 transitions, 2302 flow, removed 16 selfloop flow, removed 0 redundant places. [2024-06-21 18:15:17,019 INFO L231 Difference]: Finished difference. Result has 136 places, 185 transitions, 1829 flow [2024-06-21 18:15:17,020 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=1692, PETRI_DIFFERENCE_MINUEND_PLACES=130, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=179, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=154, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1829, PETRI_PLACES=136, PETRI_TRANSITIONS=185} [2024-06-21 18:15:17,020 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 82 predicate places. [2024-06-21 18:15:17,021 INFO L495 AbstractCegarLoop]: Abstraction has has 136 places, 185 transitions, 1829 flow [2024-06-21 18:15:17,021 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.0) internal successors, (133), 7 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:15:17,021 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:15:17,021 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:15:17,021 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-06-21 18:15:17,031 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 18:15:17,031 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:15:17,031 INFO L85 PathProgramCache]: Analyzing trace with hash 3700950, now seen corresponding path program 3 times [2024-06-21 18:15:17,032 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:15:17,032 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [685015031] [2024-06-21 18:15:17,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:15:17,032 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:15:17,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:15:17,230 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:15:17,231 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:15:17,231 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [685015031] [2024-06-21 18:15:17,231 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [685015031] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:15:17,231 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:15:17,231 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 18:15:17,231 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [857833073] [2024-06-21 18:15:17,231 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:15:17,231 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 18:15:17,232 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:15:17,232 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 18:15:17,232 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-21 18:15:17,273 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 51 [2024-06-21 18:15:17,273 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 136 places, 185 transitions, 1829 flow. Second operand has 7 states, 7 states have (on average 19.0) internal successors, (133), 7 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:15:17,273 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:15:17,273 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 51 [2024-06-21 18:15:17,273 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:15:18,238 INFO L124 PetriNetUnfolderBase]: 7472/10925 cut-off events. [2024-06-21 18:15:18,238 INFO L125 PetriNetUnfolderBase]: For 241107/241127 co-relation queries the response was YES. [2024-06-21 18:15:18,301 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61037 conditions, 10925 events. 7472/10925 cut-off events. For 241107/241127 co-relation queries the response was YES. Maximal size of possible extension queue 441. Compared 63881 event pairs, 2649 based on Foata normal form. 18/10938 useless extension candidates. Maximal degree in co-relation 60973. Up to 10191 conditions per place. [2024-06-21 18:15:18,350 INFO L140 encePairwiseOnDemand]: 42/51 looper letters, 171 selfloop transitions, 31 changer transitions 0/211 dead transitions. [2024-06-21 18:15:18,350 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 140 places, 211 transitions, 2303 flow [2024-06-21 18:15:18,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-21 18:15:18,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-21 18:15:18,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 158 transitions. [2024-06-21 18:15:18,350 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6196078431372549 [2024-06-21 18:15:18,351 INFO L175 Difference]: Start difference. First operand has 136 places, 185 transitions, 1829 flow. Second operand 5 states and 158 transitions. [2024-06-21 18:15:18,351 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 140 places, 211 transitions, 2303 flow [2024-06-21 18:15:18,686 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 139 places, 211 transitions, 2243 flow, removed 17 selfloop flow, removed 1 redundant places. [2024-06-21 18:15:18,688 INFO L231 Difference]: Finished difference. Result has 140 places, 185 transitions, 1845 flow [2024-06-21 18:15:18,688 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=1769, PETRI_DIFFERENCE_MINUEND_PLACES=135, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=185, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=154, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1845, PETRI_PLACES=140, PETRI_TRANSITIONS=185} [2024-06-21 18:15:18,689 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 86 predicate places. [2024-06-21 18:15:18,689 INFO L495 AbstractCegarLoop]: Abstraction has has 140 places, 185 transitions, 1845 flow [2024-06-21 18:15:18,689 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.0) internal successors, (133), 7 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:15:18,689 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:15:18,689 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:15:18,689 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2024-06-21 18:15:18,690 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 18:15:18,690 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:15:18,690 INFO L85 PathProgramCache]: Analyzing trace with hash -936754310, now seen corresponding path program 1 times [2024-06-21 18:15:18,690 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:15:18,690 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1374223375] [2024-06-21 18:15:18,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:15:18,690 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:15:18,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:15:18,845 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:15:18,845 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:15:18,846 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1374223375] [2024-06-21 18:15:18,846 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1374223375] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:15:18,846 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:15:18,846 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 18:15:18,846 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [695362575] [2024-06-21 18:15:18,846 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:15:18,846 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 18:15:18,846 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:15:18,847 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 18:15:18,847 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-21 18:15:18,892 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 51 [2024-06-21 18:15:18,892 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 140 places, 185 transitions, 1845 flow. Second operand has 7 states, 7 states have (on average 20.0) internal successors, (140), 7 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:15:18,892 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:15:18,892 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 51 [2024-06-21 18:15:18,892 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:15:19,829 INFO L124 PetriNetUnfolderBase]: 6148/8990 cut-off events. [2024-06-21 18:15:19,829 INFO L125 PetriNetUnfolderBase]: For 216254/216258 co-relation queries the response was YES. [2024-06-21 18:15:19,869 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51951 conditions, 8990 events. 6148/8990 cut-off events. For 216254/216258 co-relation queries the response was YES. Maximal size of possible extension queue 388. Compared 51769 event pairs, 2307 based on Foata normal form. 6/8992 useless extension candidates. Maximal degree in co-relation 51885. Up to 8422 conditions per place. [2024-06-21 18:15:19,911 INFO L140 encePairwiseOnDemand]: 41/51 looper letters, 188 selfloop transitions, 33 changer transitions 0/231 dead transitions. [2024-06-21 18:15:19,911 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 145 places, 231 transitions, 2616 flow [2024-06-21 18:15:19,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 18:15:19,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 18:15:19,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 187 transitions. [2024-06-21 18:15:19,912 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6111111111111112 [2024-06-21 18:15:19,912 INFO L175 Difference]: Start difference. First operand has 140 places, 185 transitions, 1845 flow. Second operand 6 states and 187 transitions. [2024-06-21 18:15:19,912 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 145 places, 231 transitions, 2616 flow [2024-06-21 18:15:20,114 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 142 places, 231 transitions, 2568 flow, removed 4 selfloop flow, removed 3 redundant places. [2024-06-21 18:15:20,116 INFO L231 Difference]: Finished difference. Result has 145 places, 202 transitions, 2059 flow [2024-06-21 18:15:20,116 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=1801, PETRI_DIFFERENCE_MINUEND_PLACES=137, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=185, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=157, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2059, PETRI_PLACES=145, PETRI_TRANSITIONS=202} [2024-06-21 18:15:20,117 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 91 predicate places. [2024-06-21 18:15:20,117 INFO L495 AbstractCegarLoop]: Abstraction has has 145 places, 202 transitions, 2059 flow [2024-06-21 18:15:20,117 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 20.0) internal successors, (140), 7 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:15:20,117 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:15:20,117 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:15:20,118 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2024-06-21 18:15:20,118 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 18:15:20,118 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:15:20,118 INFO L85 PathProgramCache]: Analyzing trace with hash 2064746374, now seen corresponding path program 2 times [2024-06-21 18:15:20,118 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:15:20,118 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2039302044] [2024-06-21 18:15:20,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:15:20,119 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:15:20,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:15:20,333 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:15:20,333 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:15:20,333 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2039302044] [2024-06-21 18:15:20,333 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2039302044] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:15:20,333 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:15:20,333 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 18:15:20,333 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1041319239] [2024-06-21 18:15:20,333 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:15:20,334 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 18:15:20,334 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:15:20,334 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 18:15:20,334 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-21 18:15:20,384 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 51 [2024-06-21 18:15:20,384 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 145 places, 202 transitions, 2059 flow. Second operand has 7 states, 7 states have (on average 20.0) internal successors, (140), 7 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:15:20,384 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:15:20,384 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 51 [2024-06-21 18:15:20,384 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:15:21,441 INFO L124 PetriNetUnfolderBase]: 6164/9017 cut-off events. [2024-06-21 18:15:21,441 INFO L125 PetriNetUnfolderBase]: For 221395/221403 co-relation queries the response was YES. [2024-06-21 18:15:21,494 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53713 conditions, 9017 events. 6164/9017 cut-off events. For 221395/221403 co-relation queries the response was YES. Maximal size of possible extension queue 388. Compared 51990 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. [2024-06-21 18:15:21,543 INFO L140 encePairwiseOnDemand]: 41/51 looper letters, 197 selfloop transitions, 33 changer transitions 0/240 dead transitions. [2024-06-21 18:15:21,544 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 151 places, 240 transitions, 2775 flow [2024-06-21 18:15:21,544 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 18:15:21,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 18:15:21,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 212 transitions. [2024-06-21 18:15:21,545 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5938375350140056 [2024-06-21 18:15:21,545 INFO L175 Difference]: Start difference. First operand has 145 places, 202 transitions, 2059 flow. Second operand 7 states and 212 transitions. [2024-06-21 18:15:21,545 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 151 places, 240 transitions, 2775 flow [2024-06-21 18:15:21,804 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 149 places, 240 transitions, 2691 flow, removed 26 selfloop flow, removed 2 redundant places. [2024-06-21 18:15:21,807 INFO L231 Difference]: Finished difference. Result has 151 places, 208 transitions, 2125 flow [2024-06-21 18:15:21,807 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=1985, PETRI_DIFFERENCE_MINUEND_PLACES=143, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=202, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=174, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2125, PETRI_PLACES=151, PETRI_TRANSITIONS=208} [2024-06-21 18:15:21,807 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 97 predicate places. [2024-06-21 18:15:21,808 INFO L495 AbstractCegarLoop]: Abstraction has has 151 places, 208 transitions, 2125 flow [2024-06-21 18:15:21,808 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 20.0) internal successors, (140), 7 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:15:21,808 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:15:21,808 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:15:21,808 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2024-06-21 18:15:21,808 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 18:15:21,809 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:15:21,809 INFO L85 PathProgramCache]: Analyzing trace with hash 2064740794, now seen corresponding path program 3 times [2024-06-21 18:15:21,809 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:15:21,809 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [720384817] [2024-06-21 18:15:21,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:15:21,809 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:15:21,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:15:21,983 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:15:21,984 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:15:21,984 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [720384817] [2024-06-21 18:15:21,984 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [720384817] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:15:21,984 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:15:21,984 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 18:15:21,984 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [159882666] [2024-06-21 18:15:21,985 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:15:21,985 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 18:15:21,985 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:15:21,985 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 18:15:21,985 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-21 18:15:22,025 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 51 [2024-06-21 18:15:22,026 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 151 places, 208 transitions, 2125 flow. Second operand has 7 states, 7 states have (on average 20.0) internal successors, (140), 7 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:15:22,026 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:15:22,026 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 51 [2024-06-21 18:15:22,026 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:15:23,025 INFO L124 PetriNetUnfolderBase]: 6157/9007 cut-off events. [2024-06-21 18:15:23,025 INFO L125 PetriNetUnfolderBase]: For 233108/233114 co-relation queries the response was YES. [2024-06-21 18:15:23,074 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53815 conditions, 9007 events. 6157/9007 cut-off events. For 233108/233114 co-relation queries the response was YES. Maximal size of possible extension queue 388. Compared 51861 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. [2024-06-21 18:15:23,116 INFO L140 encePairwiseOnDemand]: 41/51 looper letters, 189 selfloop transitions, 31 changer transitions 0/230 dead transitions. [2024-06-21 18:15:23,116 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 155 places, 230 transitions, 2625 flow [2024-06-21 18:15:23,117 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-21 18:15:23,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-21 18:15:23,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 159 transitions. [2024-06-21 18:15:23,117 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6235294117647059 [2024-06-21 18:15:23,117 INFO L175 Difference]: Start difference. First operand has 151 places, 208 transitions, 2125 flow. Second operand 5 states and 159 transitions. [2024-06-21 18:15:23,117 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 155 places, 230 transitions, 2625 flow [2024-06-21 18:15:23,447 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 151 places, 230 transitions, 2515 flow, removed 23 selfloop flow, removed 4 redundant places. [2024-06-21 18:15:23,452 INFO L231 Difference]: Finished difference. Result has 152 places, 208 transitions, 2086 flow [2024-06-21 18:15:23,452 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=2015, PETRI_DIFFERENCE_MINUEND_PLACES=147, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=208, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=177, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=2086, PETRI_PLACES=152, PETRI_TRANSITIONS=208} [2024-06-21 18:15:23,452 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 98 predicate places. [2024-06-21 18:15:23,452 INFO L495 AbstractCegarLoop]: Abstraction has has 152 places, 208 transitions, 2086 flow [2024-06-21 18:15:23,453 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 20.0) internal successors, (140), 7 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:15:23,453 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:15:23,453 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:15:23,453 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2024-06-21 18:15:23,453 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 18:15:23,453 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:15:23,453 INFO L85 PathProgramCache]: Analyzing trace with hash 1711749199, now seen corresponding path program 1 times [2024-06-21 18:15:23,454 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:15:23,454 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1184295466] [2024-06-21 18:15:23,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:15:23,454 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:15:23,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:15:23,602 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:15:23,603 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:15:23,603 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1184295466] [2024-06-21 18:15:23,603 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1184295466] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:15:23,603 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:15:23,603 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 18:15:23,603 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1789426511] [2024-06-21 18:15:23,603 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:15:23,604 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 18:15:23,604 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:15:23,604 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 18:15:23,604 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-06-21 18:15:23,647 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 51 [2024-06-21 18:15:23,648 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 152 places, 208 transitions, 2086 flow. Second operand has 6 states, 6 states have (on average 20.666666666666668) internal successors, (124), 6 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:15:23,648 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:15:23,648 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 51 [2024-06-21 18:15:23,648 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:15:24,717 INFO L124 PetriNetUnfolderBase]: 6897/10157 cut-off events. [2024-06-21 18:15:24,717 INFO L125 PetriNetUnfolderBase]: For 318780/318947 co-relation queries the response was YES. [2024-06-21 18:15:24,770 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62317 conditions, 10157 events. 6897/10157 cut-off events. For 318780/318947 co-relation queries the response was YES. Maximal size of possible extension queue 447. Compared 60246 event pairs, 2392 based on Foata normal form. 45/9977 useless extension candidates. Maximal degree in co-relation 62245. Up to 9062 conditions per place. [2024-06-21 18:15:24,812 INFO L140 encePairwiseOnDemand]: 44/51 looper letters, 177 selfloop transitions, 18 changer transitions 0/238 dead transitions. [2024-06-21 18:15:24,814 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 155 places, 238 transitions, 2722 flow [2024-06-21 18:15:24,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-21 18:15:24,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-21 18:15:24,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 122 transitions. [2024-06-21 18:15:24,815 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5980392156862745 [2024-06-21 18:15:24,815 INFO L175 Difference]: Start difference. First operand has 152 places, 208 transitions, 2086 flow. Second operand 4 states and 122 transitions. [2024-06-21 18:15:24,815 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 155 places, 238 transitions, 2722 flow [2024-06-21 18:15:25,140 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 151 places, 238 transitions, 2652 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-06-21 18:15:25,142 INFO L231 Difference]: Finished difference. Result has 153 places, 225 transitions, 2309 flow [2024-06-21 18:15:25,142 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=2024, PETRI_DIFFERENCE_MINUEND_PLACES=148, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=208, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=191, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=2309, PETRI_PLACES=153, PETRI_TRANSITIONS=225} [2024-06-21 18:15:25,143 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 99 predicate places. [2024-06-21 18:15:25,143 INFO L495 AbstractCegarLoop]: Abstraction has has 153 places, 225 transitions, 2309 flow [2024-06-21 18:15:25,143 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 20.666666666666668) internal successors, (124), 6 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:15:25,143 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:15:25,143 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:15:25,143 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2024-06-21 18:15:25,143 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 18:15:25,144 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:15:25,144 INFO L85 PathProgramCache]: Analyzing trace with hash 1022527479, now seen corresponding path program 1 times [2024-06-21 18:15:25,144 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:15:25,144 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [645229166] [2024-06-21 18:15:25,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:15:25,144 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:15:25,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:15:25,308 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:15:25,308 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:15:25,308 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [645229166] [2024-06-21 18:15:25,308 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [645229166] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:15:25,309 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:15:25,309 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 18:15:25,309 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [92816441] [2024-06-21 18:15:25,309 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:15:25,309 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 18:15:25,309 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:15:25,310 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 18:15:25,310 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-21 18:15:25,384 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 51 [2024-06-21 18:15:25,385 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 153 places, 225 transitions, 2309 flow. Second operand has 7 states, 7 states have (on average 21.0) internal successors, (147), 7 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:15:25,385 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:15:25,385 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 51 [2024-06-21 18:15:25,385 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:15:26,417 INFO L124 PetriNetUnfolderBase]: 6790/10087 cut-off events. [2024-06-21 18:15:26,417 INFO L125 PetriNetUnfolderBase]: For 345582/346168 co-relation queries the response was YES. [2024-06-21 18:15:26,476 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65926 conditions, 10087 events. 6790/10087 cut-off events. For 345582/346168 co-relation queries the response was YES. Maximal size of possible extension queue 451. Compared 60429 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. [2024-06-21 18:15:26,520 INFO L140 encePairwiseOnDemand]: 42/51 looper letters, 174 selfloop transitions, 61 changer transitions 0/263 dead transitions. [2024-06-21 18:15:26,520 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 158 places, 263 transitions, 3089 flow [2024-06-21 18:15:26,521 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 18:15:26,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 18:15:26,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 194 transitions. [2024-06-21 18:15:26,521 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6339869281045751 [2024-06-21 18:15:26,521 INFO L175 Difference]: Start difference. First operand has 153 places, 225 transitions, 2309 flow. Second operand 6 states and 194 transitions. [2024-06-21 18:15:26,521 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 158 places, 263 transitions, 3089 flow [2024-06-21 18:15:26,894 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 158 places, 263 transitions, 3069 flow, removed 10 selfloop flow, removed 0 redundant places. [2024-06-21 18:15:26,897 INFO L231 Difference]: Finished difference. Result has 159 places, 231 transitions, 2537 flow [2024-06-21 18:15:26,897 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=2289, PETRI_DIFFERENCE_MINUEND_PLACES=153, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=225, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=58, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=167, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2537, PETRI_PLACES=159, PETRI_TRANSITIONS=231} [2024-06-21 18:15:26,897 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 105 predicate places. [2024-06-21 18:15:26,897 INFO L495 AbstractCegarLoop]: Abstraction has has 159 places, 231 transitions, 2537 flow [2024-06-21 18:15:26,897 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 21.0) internal successors, (147), 7 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:15:26,898 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:15:26,898 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:15:26,898 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2024-06-21 18:15:26,898 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 18:15:26,898 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:15:26,898 INFO L85 PathProgramCache]: Analyzing trace with hash 247081143, now seen corresponding path program 2 times [2024-06-21 18:15:26,898 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:15:26,898 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [575470763] [2024-06-21 18:15:26,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:15:26,898 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:15:26,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:15:27,088 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:15:27,088 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:15:27,088 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [575470763] [2024-06-21 18:15:27,088 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [575470763] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:15:27,088 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:15:27,088 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 18:15:27,089 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1043468803] [2024-06-21 18:15:27,089 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:15:27,089 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 18:15:27,089 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:15:27,089 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 18:15:27,089 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-21 18:15:27,152 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 51 [2024-06-21 18:15:27,153 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 159 places, 231 transitions, 2537 flow. Second operand has 7 states, 7 states have (on average 21.0) internal successors, (147), 7 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:15:27,153 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:15:27,153 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 51 [2024-06-21 18:15:27,153 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:15:28,224 INFO L124 PetriNetUnfolderBase]: 6833/10150 cut-off events. [2024-06-21 18:15:28,224 INFO L125 PetriNetUnfolderBase]: For 375978/376650 co-relation queries the response was YES. [2024-06-21 18:15:28,296 INFO L83 FinitePrefix]: Finished finitePrefix Result has 68447 conditions, 10150 events. 6833/10150 cut-off events. For 375978/376650 co-relation queries the response was YES. Maximal size of possible extension queue 452. Compared 60895 event pairs, 2203 based on Foata normal form. 58/9833 useless extension candidates. Maximal degree in co-relation 68371. Up to 9189 conditions per place. [2024-06-21 18:15:28,346 INFO L140 encePairwiseOnDemand]: 42/51 looper letters, 175 selfloop transitions, 57 changer transitions 0/260 dead transitions. [2024-06-21 18:15:28,346 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 164 places, 260 transitions, 3129 flow [2024-06-21 18:15:28,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 18:15:28,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 18:15:28,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 188 transitions. [2024-06-21 18:15:28,347 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6143790849673203 [2024-06-21 18:15:28,347 INFO L175 Difference]: Start difference. First operand has 159 places, 231 transitions, 2537 flow. Second operand 6 states and 188 transitions. [2024-06-21 18:15:28,347 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 164 places, 260 transitions, 3129 flow [2024-06-21 18:15:28,880 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 162 places, 260 transitions, 2987 flow, removed 41 selfloop flow, removed 2 redundant places. [2024-06-21 18:15:28,883 INFO L231 Difference]: Finished difference. Result has 163 places, 234 transitions, 2586 flow [2024-06-21 18:15:28,883 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=2413, PETRI_DIFFERENCE_MINUEND_PLACES=157, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=231, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=54, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=174, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2586, PETRI_PLACES=163, PETRI_TRANSITIONS=234} [2024-06-21 18:15:28,884 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 109 predicate places. [2024-06-21 18:15:28,884 INFO L495 AbstractCegarLoop]: Abstraction has has 163 places, 234 transitions, 2586 flow [2024-06-21 18:15:28,884 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 21.0) internal successors, (147), 7 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:15:28,884 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:15:28,884 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:15:28,884 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2024-06-21 18:15:28,884 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 18:15:28,884 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:15:28,884 INFO L85 PathProgramCache]: Analyzing trace with hash -417547849, now seen corresponding path program 3 times [2024-06-21 18:15:28,885 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:15:28,885 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1535616173] [2024-06-21 18:15:28,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:15:28,885 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:15:28,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:15:29,041 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:15:29,042 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:15:29,042 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1535616173] [2024-06-21 18:15:29,042 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1535616173] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:15:29,042 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:15:29,042 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 18:15:29,042 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [717941648] [2024-06-21 18:15:29,042 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:15:29,043 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 18:15:29,043 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:15:29,044 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 18:15:29,044 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-21 18:15:29,089 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 51 [2024-06-21 18:15:29,089 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 163 places, 234 transitions, 2586 flow. Second operand has 7 states, 7 states have (on average 21.0) internal successors, (147), 7 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:15:29,089 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:15:29,089 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 51 [2024-06-21 18:15:29,090 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:15:30,200 INFO L124 PetriNetUnfolderBase]: 6808/10117 cut-off events. [2024-06-21 18:15:30,200 INFO L125 PetriNetUnfolderBase]: For 390026/390674 co-relation queries the response was YES. [2024-06-21 18:15:30,263 INFO L83 FinitePrefix]: Finished finitePrefix Result has 68305 conditions, 10117 events. 6808/10117 cut-off events. For 390026/390674 co-relation queries the response was YES. Maximal size of possible extension queue 449. Compared 60475 event pairs, 2023 based on Foata normal form. 84/9830 useless extension candidates. Maximal degree in co-relation 68227. Up to 9116 conditions per place. [2024-06-21 18:15:30,308 INFO L140 encePairwiseOnDemand]: 42/51 looper letters, 178 selfloop transitions, 53 changer transitions 0/259 dead transitions. [2024-06-21 18:15:30,309 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 167 places, 259 transitions, 3112 flow [2024-06-21 18:15:30,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-21 18:15:30,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-21 18:15:30,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 165 transitions. [2024-06-21 18:15:30,310 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6470588235294118 [2024-06-21 18:15:30,310 INFO L175 Difference]: Start difference. First operand has 163 places, 234 transitions, 2586 flow. Second operand 5 states and 165 transitions. [2024-06-21 18:15:30,310 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 167 places, 259 transitions, 3112 flow [2024-06-21 18:15:30,859 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 163 places, 259 transitions, 2951 flow, removed 26 selfloop flow, removed 4 redundant places. [2024-06-21 18:15:30,862 INFO L231 Difference]: Finished difference. Result has 164 places, 234 transitions, 2545 flow [2024-06-21 18:15:30,862 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=2425, PETRI_DIFFERENCE_MINUEND_PLACES=159, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=234, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=181, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=2545, PETRI_PLACES=164, PETRI_TRANSITIONS=234} [2024-06-21 18:15:30,862 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 110 predicate places. [2024-06-21 18:15:30,863 INFO L495 AbstractCegarLoop]: Abstraction has has 164 places, 234 transitions, 2545 flow [2024-06-21 18:15:30,863 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 21.0) internal successors, (147), 7 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:15:30,863 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:15:30,863 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:15:30,863 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2024-06-21 18:15:30,863 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 18:15:30,863 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:15:30,864 INFO L85 PathProgramCache]: Analyzing trace with hash 1483325819, now seen corresponding path program 1 times [2024-06-21 18:15:30,864 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:15:30,864 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1198496908] [2024-06-21 18:15:30,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:15:30,864 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:15:30,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:15:31,009 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:15:31,009 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:15:31,009 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1198496908] [2024-06-21 18:15:31,009 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1198496908] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:15:31,009 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:15:31,009 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 18:15:31,010 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [31533884] [2024-06-21 18:15:31,010 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:15:31,010 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 18:15:31,010 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:15:31,010 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 18:15:31,011 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2024-06-21 18:15:31,076 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 51 [2024-06-21 18:15:31,076 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 164 places, 234 transitions, 2545 flow. Second operand has 8 states, 8 states have (on average 19.875) internal successors, (159), 8 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:15:31,076 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:15:31,076 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 51 [2024-06-21 18:15:31,077 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:15:32,221 INFO L124 PetriNetUnfolderBase]: 7307/10733 cut-off events. [2024-06-21 18:15:32,222 INFO L125 PetriNetUnfolderBase]: For 408773/409627 co-relation queries the response was YES. [2024-06-21 18:15:32,286 INFO L83 FinitePrefix]: Finished finitePrefix Result has 71229 conditions, 10733 events. 7307/10733 cut-off events. For 408773/409627 co-relation queries the response was YES. Maximal size of possible extension queue 464. Compared 63702 event pairs, 2253 based on Foata normal form. 123/10438 useless extension candidates. Maximal degree in co-relation 71150. Up to 9459 conditions per place. [2024-06-21 18:15:32,336 INFO L140 encePairwiseOnDemand]: 40/51 looper letters, 171 selfloop transitions, 93 changer transitions 0/289 dead transitions. [2024-06-21 18:15:32,336 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 170 places, 289 transitions, 3635 flow [2024-06-21 18:15:32,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 18:15:32,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 18:15:32,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 228 transitions. [2024-06-21 18:15:32,337 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6386554621848739 [2024-06-21 18:15:32,337 INFO L175 Difference]: Start difference. First operand has 164 places, 234 transitions, 2545 flow. Second operand 7 states and 228 transitions. [2024-06-21 18:15:32,337 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 170 places, 289 transitions, 3635 flow [2024-06-21 18:15:32,856 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 166 places, 289 transitions, 3518 flow, removed 3 selfloop flow, removed 4 redundant places. [2024-06-21 18:15:32,859 INFO L231 Difference]: Finished difference. Result has 167 places, 246 transitions, 2823 flow [2024-06-21 18:15:32,859 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=2428, PETRI_DIFFERENCE_MINUEND_PLACES=160, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=234, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=85, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=149, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2823, PETRI_PLACES=167, PETRI_TRANSITIONS=246} [2024-06-21 18:15:32,859 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 113 predicate places. [2024-06-21 18:15:32,859 INFO L495 AbstractCegarLoop]: Abstraction has has 167 places, 246 transitions, 2823 flow [2024-06-21 18:15:32,859 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 19.875) internal successors, (159), 8 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:15:32,860 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:15:32,860 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:15:32,860 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2024-06-21 18:15:32,860 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 18:15:32,860 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:15:32,860 INFO L85 PathProgramCache]: Analyzing trace with hash -186692563, now seen corresponding path program 2 times [2024-06-21 18:15:32,860 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:15:32,860 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [86635262] [2024-06-21 18:15:32,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:15:32,860 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:15:32,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:15:33,040 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:15:33,041 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:15:33,041 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [86635262] [2024-06-21 18:15:33,041 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [86635262] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:15:33,041 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:15:33,041 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 18:15:33,041 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1153953461] [2024-06-21 18:15:33,041 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:15:33,042 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 18:15:33,042 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:15:33,042 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 18:15:33,042 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-21 18:15:33,101 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 51 [2024-06-21 18:15:33,102 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 167 places, 246 transitions, 2823 flow. Second operand has 8 states, 8 states have (on average 19.875) internal successors, (159), 8 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:15:33,102 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:15:33,102 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 51 [2024-06-21 18:15:33,102 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:15:34,392 INFO L124 PetriNetUnfolderBase]: 7304/10740 cut-off events. [2024-06-21 18:15:34,392 INFO L125 PetriNetUnfolderBase]: For 439262/440208 co-relation queries the response was YES. [2024-06-21 18:15:34,441 INFO L83 FinitePrefix]: Finished finitePrefix Result has 73688 conditions, 10740 events. 7304/10740 cut-off events. For 439262/440208 co-relation queries the response was YES. Maximal size of possible extension queue 461. Compared 63893 event pairs, 2223 based on Foata normal form. 167/10500 useless extension candidates. Maximal degree in co-relation 73608. Up to 9660 conditions per place. [2024-06-21 18:15:34,488 INFO L140 encePairwiseOnDemand]: 40/51 looper letters, 193 selfloop transitions, 71 changer transitions 0/289 dead transitions. [2024-06-21 18:15:34,488 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 173 places, 289 transitions, 3552 flow [2024-06-21 18:15:34,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 18:15:34,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 18:15:34,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 218 transitions. [2024-06-21 18:15:34,489 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6106442577030813 [2024-06-21 18:15:34,489 INFO L175 Difference]: Start difference. First operand has 167 places, 246 transitions, 2823 flow. Second operand 7 states and 218 transitions. [2024-06-21 18:15:34,489 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 173 places, 289 transitions, 3552 flow [2024-06-21 18:15:34,889 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 171 places, 289 transitions, 3390 flow, removed 51 selfloop flow, removed 2 redundant places. [2024-06-21 18:15:34,892 INFO L231 Difference]: Finished difference. Result has 172 places, 254 transitions, 2931 flow [2024-06-21 18:15:34,892 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=2685, PETRI_DIFFERENCE_MINUEND_PLACES=165, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=246, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=63, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=179, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2931, PETRI_PLACES=172, PETRI_TRANSITIONS=254} [2024-06-21 18:15:34,892 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 118 predicate places. [2024-06-21 18:15:34,892 INFO L495 AbstractCegarLoop]: Abstraction has has 172 places, 254 transitions, 2931 flow [2024-06-21 18:15:34,893 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 19.875) internal successors, (159), 8 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:15:34,893 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:15:34,893 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:15:34,893 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2024-06-21 18:15:34,893 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 18:15:34,893 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:15:34,893 INFO L85 PathProgramCache]: Analyzing trace with hash -255980055, now seen corresponding path program 1 times [2024-06-21 18:15:34,893 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:15:34,893 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [822631296] [2024-06-21 18:15:34,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:15:34,894 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:15:34,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:15:35,047 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:15:35,048 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:15:35,048 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [822631296] [2024-06-21 18:15:35,048 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [822631296] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:15:35,048 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:15:35,048 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 18:15:35,048 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [282618801] [2024-06-21 18:15:35,048 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:15:35,049 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 18:15:35,049 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:15:35,049 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 18:15:35,049 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2024-06-21 18:15:35,101 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 51 [2024-06-21 18:15:35,101 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 172 places, 254 transitions, 2931 flow. Second operand has 8 states, 8 states have (on average 18.875) internal successors, (151), 8 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:15:35,101 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:15:35,101 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 51 [2024-06-21 18:15:35,101 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:15:36,283 INFO L124 PetriNetUnfolderBase]: 7766/11360 cut-off events. [2024-06-21 18:15:36,284 INFO L125 PetriNetUnfolderBase]: For 413491/413523 co-relation queries the response was YES. [2024-06-21 18:15:36,358 INFO L83 FinitePrefix]: Finished finitePrefix Result has 73926 conditions, 11360 events. 7766/11360 cut-off events. For 413491/413523 co-relation queries the response was YES. Maximal size of possible extension queue 440. Compared 66466 event pairs, 2556 based on Foata normal form. 30/11386 useless extension candidates. Maximal degree in co-relation 73844. Up to 10362 conditions per place. [2024-06-21 18:15:36,411 INFO L140 encePairwiseOnDemand]: 40/51 looper letters, 252 selfloop transitions, 63 changer transitions 0/324 dead transitions. [2024-06-21 18:15:36,411 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 178 places, 324 transitions, 4264 flow [2024-06-21 18:15:36,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 18:15:36,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 18:15:36,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 219 transitions. [2024-06-21 18:15:36,412 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6134453781512605 [2024-06-21 18:15:36,412 INFO L175 Difference]: Start difference. First operand has 172 places, 254 transitions, 2931 flow. Second operand 7 states and 219 transitions. [2024-06-21 18:15:36,412 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 178 places, 324 transitions, 4264 flow [2024-06-21 18:15:37,121 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 174 places, 324 transitions, 4062 flow, removed 21 selfloop flow, removed 4 redundant places. [2024-06-21 18:15:37,125 INFO L231 Difference]: Finished difference. Result has 178 places, 279 transitions, 3238 flow [2024-06-21 18:15:37,125 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=2758, PETRI_DIFFERENCE_MINUEND_PLACES=168, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=254, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=200, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3238, PETRI_PLACES=178, PETRI_TRANSITIONS=279} [2024-06-21 18:15:37,125 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 124 predicate places. [2024-06-21 18:15:37,125 INFO L495 AbstractCegarLoop]: Abstraction has has 178 places, 279 transitions, 3238 flow [2024-06-21 18:15:37,126 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.875) internal successors, (151), 8 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:15:37,126 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:15:37,126 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:15:37,126 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2024-06-21 18:15:37,126 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 18:15:37,126 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:15:37,126 INFO L85 PathProgramCache]: Analyzing trace with hash 1660577495, now seen corresponding path program 2 times [2024-06-21 18:15:37,126 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:15:37,126 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1701338199] [2024-06-21 18:15:37,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:15:37,127 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:15:37,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:15:37,289 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:15:37,289 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:15:37,289 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1701338199] [2024-06-21 18:15:37,289 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1701338199] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:15:37,289 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:15:37,289 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 18:15:37,289 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1662376172] [2024-06-21 18:15:37,290 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:15:37,290 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 18:15:37,290 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:15:37,290 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 18:15:37,290 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2024-06-21 18:15:37,329 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 51 [2024-06-21 18:15:37,329 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 178 places, 279 transitions, 3238 flow. Second operand has 8 states, 8 states have (on average 18.875) internal successors, (151), 8 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:15:37,329 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:15:37,329 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 51 [2024-06-21 18:15:37,329 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:15:38,667 INFO L124 PetriNetUnfolderBase]: 7860/11493 cut-off events. [2024-06-21 18:15:38,668 INFO L125 PetriNetUnfolderBase]: For 443234/443269 co-relation queries the response was YES. [2024-06-21 18:15:38,742 INFO L83 FinitePrefix]: Finished finitePrefix Result has 77372 conditions, 11493 events. 7860/11493 cut-off events. For 443234/443269 co-relation queries the response was YES. Maximal size of possible extension queue 440. Compared 67407 event pairs, 2556 based on Foata normal form. 33/11522 useless extension candidates. Maximal degree in co-relation 77286. Up to 10451 conditions per place. [2024-06-21 18:15:38,793 INFO L140 encePairwiseOnDemand]: 40/51 looper letters, 255 selfloop transitions, 77 changer transitions 0/341 dead transitions. [2024-06-21 18:15:38,793 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 184 places, 341 transitions, 4694 flow [2024-06-21 18:15:38,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 18:15:38,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 18:15:38,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 219 transitions. [2024-06-21 18:15:38,794 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6134453781512605 [2024-06-21 18:15:38,794 INFO L175 Difference]: Start difference. First operand has 178 places, 279 transitions, 3238 flow. Second operand 7 states and 219 transitions. [2024-06-21 18:15:38,794 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 184 places, 341 transitions, 4694 flow [2024-06-21 18:15:39,634 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 183 places, 341 transitions, 4598 flow, removed 39 selfloop flow, removed 1 redundant places. [2024-06-21 18:15:39,638 INFO L231 Difference]: Finished difference. Result has 186 places, 297 transitions, 3582 flow [2024-06-21 18:15:39,638 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=3166, PETRI_DIFFERENCE_MINUEND_PLACES=177, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=279, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=59, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=218, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3582, PETRI_PLACES=186, PETRI_TRANSITIONS=297} [2024-06-21 18:15:39,638 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 132 predicate places. [2024-06-21 18:15:39,639 INFO L495 AbstractCegarLoop]: Abstraction has has 186 places, 297 transitions, 3582 flow [2024-06-21 18:15:39,639 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.875) internal successors, (151), 8 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:15:39,639 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:15:39,639 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:15:39,639 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2024-06-21 18:15:39,639 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 18:15:39,640 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:15:39,640 INFO L85 PathProgramCache]: Analyzing trace with hash 1660814645, now seen corresponding path program 3 times [2024-06-21 18:15:39,640 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:15:39,640 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2039139283] [2024-06-21 18:15:39,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:15:39,640 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:15:39,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:15:39,794 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:15:39,794 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:15:39,794 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2039139283] [2024-06-21 18:15:39,794 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2039139283] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:15:39,794 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:15:39,794 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 18:15:39,794 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1828871102] [2024-06-21 18:15:39,794 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:15:39,795 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 18:15:39,795 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:15:39,795 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 18:15:39,795 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2024-06-21 18:15:39,848 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 51 [2024-06-21 18:15:39,849 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 186 places, 297 transitions, 3582 flow. Second operand has 8 states, 8 states have (on average 18.875) internal successors, (151), 8 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:15:39,849 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:15:39,849 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 51 [2024-06-21 18:15:39,849 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:15:41,153 INFO L124 PetriNetUnfolderBase]: 7853/11484 cut-off events. [2024-06-21 18:15:41,153 INFO L125 PetriNetUnfolderBase]: For 464421/464458 co-relation queries the response was YES. [2024-06-21 18:15:41,227 INFO L83 FinitePrefix]: Finished finitePrefix Result has 78317 conditions, 11484 events. 7853/11484 cut-off events. For 464421/464458 co-relation queries the response was YES. Maximal size of possible extension queue 440. Compared 67343 event pairs, 2556 based on Foata normal form. 35/11515 useless extension candidates. Maximal degree in co-relation 78227. Up to 10444 conditions per place. [2024-06-21 18:15:41,277 INFO L140 encePairwiseOnDemand]: 40/51 looper letters, 251 selfloop transitions, 81 changer transitions 0/341 dead transitions. [2024-06-21 18:15:41,278 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 192 places, 341 transitions, 4693 flow [2024-06-21 18:15:41,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 18:15:41,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 18:15:41,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 216 transitions. [2024-06-21 18:15:41,278 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6050420168067226 [2024-06-21 18:15:41,279 INFO L175 Difference]: Start difference. First operand has 186 places, 297 transitions, 3582 flow. Second operand 7 states and 216 transitions. [2024-06-21 18:15:41,279 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 192 places, 341 transitions, 4693 flow [2024-06-21 18:15:41,970 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 190 places, 341 transitions, 4556 flow, removed 26 selfloop flow, removed 2 redundant places. [2024-06-21 18:15:41,974 INFO L231 Difference]: Finished difference. Result has 192 places, 300 transitions, 3667 flow [2024-06-21 18:15:41,974 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=3449, PETRI_DIFFERENCE_MINUEND_PLACES=184, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=297, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=78, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=218, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3667, PETRI_PLACES=192, PETRI_TRANSITIONS=300} [2024-06-21 18:15:41,974 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 138 predicate places. [2024-06-21 18:15:41,974 INFO L495 AbstractCegarLoop]: Abstraction has has 192 places, 300 transitions, 3667 flow [2024-06-21 18:15:41,975 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.875) internal successors, (151), 8 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:15:41,975 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:15:41,975 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:15:41,975 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2024-06-21 18:15:41,975 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 18:15:41,975 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:15:41,975 INFO L85 PathProgramCache]: Analyzing trace with hash 1660577309, now seen corresponding path program 3 times [2024-06-21 18:15:41,975 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:15:41,975 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [723904553] [2024-06-21 18:15:41,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:15:41,975 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:15:41,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:15:42,147 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:15:42,147 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:15:42,147 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [723904553] [2024-06-21 18:15:42,147 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [723904553] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:15:42,147 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:15:42,148 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 18:15:42,148 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2121691692] [2024-06-21 18:15:42,148 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:15:42,148 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 18:15:42,148 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:15:42,148 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 18:15:42,148 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-21 18:15:42,201 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 51 [2024-06-21 18:15:42,202 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 192 places, 300 transitions, 3667 flow. Second operand has 8 states, 8 states have (on average 19.875) internal successors, (159), 8 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:15:42,202 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:15:42,202 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 51 [2024-06-21 18:15:42,202 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:15:43,515 INFO L124 PetriNetUnfolderBase]: 7523/11066 cut-off events. [2024-06-21 18:15:43,515 INFO L125 PetriNetUnfolderBase]: For 547457/548669 co-relation queries the response was YES. [2024-06-21 18:15:43,592 INFO L83 FinitePrefix]: Finished finitePrefix Result has 80744 conditions, 11066 events. 7523/11066 cut-off events. For 547457/548669 co-relation queries the response was YES. Maximal size of possible extension queue 464. Compared 66066 event pairs, 2209 based on Foata normal form. 70/10749 useless extension candidates. Maximal degree in co-relation 80652. Up to 9880 conditions per place. [2024-06-21 18:15:43,646 INFO L140 encePairwiseOnDemand]: 40/51 looper letters, 216 selfloop transitions, 108 changer transitions 0/358 dead transitions. [2024-06-21 18:15:43,646 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 199 places, 358 transitions, 4831 flow [2024-06-21 18:15:43,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 18:15:43,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 18:15:43,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 243 transitions. [2024-06-21 18:15:43,649 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5955882352941176 [2024-06-21 18:15:43,649 INFO L175 Difference]: Start difference. First operand has 192 places, 300 transitions, 3667 flow. Second operand 8 states and 243 transitions. [2024-06-21 18:15:43,649 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 199 places, 358 transitions, 4831 flow [2024-06-21 18:15:44,780 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 196 places, 358 transitions, 4694 flow, removed 9 selfloop flow, removed 3 redundant places. [2024-06-21 18:15:44,784 INFO L231 Difference]: Finished difference. Result has 199 places, 320 transitions, 4082 flow [2024-06-21 18:15:44,784 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=3530, PETRI_DIFFERENCE_MINUEND_PLACES=189, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=300, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=88, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=203, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4082, PETRI_PLACES=199, PETRI_TRANSITIONS=320} [2024-06-21 18:15:44,785 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 145 predicate places. [2024-06-21 18:15:44,785 INFO L495 AbstractCegarLoop]: Abstraction has has 199 places, 320 transitions, 4082 flow [2024-06-21 18:15:44,785 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 19.875) internal successors, (159), 8 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:15:44,785 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:15:44,785 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:15:44,785 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2024-06-21 18:15:44,785 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 18:15:44,786 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:15:44,786 INFO L85 PathProgramCache]: Analyzing trace with hash 1394787959, now seen corresponding path program 1 times [2024-06-21 18:15:44,786 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:15:44,786 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1703968890] [2024-06-21 18:15:44,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:15:44,786 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:15:44,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:15:44,997 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:15:44,997 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:15:44,997 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1703968890] [2024-06-21 18:15:44,997 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1703968890] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:15:44,997 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:15:44,997 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 18:15:44,997 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [893448205] [2024-06-21 18:15:44,997 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:15:44,998 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 18:15:44,998 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:15:44,998 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 18:15:44,998 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-21 18:15:45,044 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 51 [2024-06-21 18:15:45,044 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 199 places, 320 transitions, 4082 flow. Second operand has 8 states, 8 states have (on average 18.875) internal successors, (151), 8 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:15:45,044 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:15:45,044 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 51 [2024-06-21 18:15:45,044 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:15:46,585 INFO L124 PetriNetUnfolderBase]: 8132/11895 cut-off events. [2024-06-21 18:15:46,585 INFO L125 PetriNetUnfolderBase]: For 531397/531419 co-relation queries the response was YES. [2024-06-21 18:15:46,675 INFO L83 FinitePrefix]: Finished finitePrefix Result has 82204 conditions, 11895 events. 8132/11895 cut-off events. For 531397/531419 co-relation queries the response was YES. Maximal size of possible extension queue 462. Compared 70050 event pairs, 2067 based on Foata normal form. 30/11921 useless extension candidates. Maximal degree in co-relation 82109. Up to 10767 conditions per place. [2024-06-21 18:15:46,730 INFO L140 encePairwiseOnDemand]: 41/51 looper letters, 331 selfloop transitions, 39 changer transitions 0/379 dead transitions. [2024-06-21 18:15:46,730 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 205 places, 379 transitions, 5234 flow [2024-06-21 18:15:46,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 18:15:46,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 18:15:46,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 218 transitions. [2024-06-21 18:15:46,731 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6106442577030813 [2024-06-21 18:15:46,731 INFO L175 Difference]: Start difference. First operand has 199 places, 320 transitions, 4082 flow. Second operand 7 states and 218 transitions. [2024-06-21 18:15:46,731 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 205 places, 379 transitions, 5234 flow [2024-06-21 18:15:47,610 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 202 places, 379 transitions, 5027 flow, removed 41 selfloop flow, removed 3 redundant places. [2024-06-21 18:15:47,614 INFO L231 Difference]: Finished difference. Result has 205 places, 330 transitions, 4088 flow [2024-06-21 18:15:47,615 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=3875, PETRI_DIFFERENCE_MINUEND_PLACES=196, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=320, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=285, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4088, PETRI_PLACES=205, PETRI_TRANSITIONS=330} [2024-06-21 18:15:47,615 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 151 predicate places. [2024-06-21 18:15:47,615 INFO L495 AbstractCegarLoop]: Abstraction has has 205 places, 330 transitions, 4088 flow [2024-06-21 18:15:47,615 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.875) internal successors, (151), 8 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:15:47,615 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:15:47,615 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:15:47,615 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2024-06-21 18:15:47,615 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 18:15:47,616 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:15:47,616 INFO L85 PathProgramCache]: Analyzing trace with hash 1660485239, now seen corresponding path program 2 times [2024-06-21 18:15:47,616 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:15:47,616 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1593969646] [2024-06-21 18:15:47,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:15:47,616 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:15:47,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:15:47,815 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:15:47,816 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:15:47,816 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1593969646] [2024-06-21 18:15:47,816 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1593969646] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:15:47,816 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:15:47,816 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 18:15:47,816 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1892563510] [2024-06-21 18:15:47,816 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:15:47,816 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 18:15:47,816 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:15:47,816 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 18:15:47,817 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-21 18:15:47,868 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 51 [2024-06-21 18:15:47,868 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 205 places, 330 transitions, 4088 flow. Second operand has 8 states, 8 states have (on average 18.875) internal successors, (151), 8 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:15:47,868 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:15:47,868 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 51 [2024-06-21 18:15:47,868 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:15:49,410 INFO L124 PetriNetUnfolderBase]: 8372/12234 cut-off events. [2024-06-21 18:15:49,410 INFO L125 PetriNetUnfolderBase]: For 571741/571763 co-relation queries the response was YES. [2024-06-21 18:15:49,504 INFO L83 FinitePrefix]: Finished finitePrefix Result has 85850 conditions, 12234 events. 8372/12234 cut-off events. For 571741/571763 co-relation queries the response was YES. Maximal size of possible extension queue 479. Compared 72222 event pairs, 2557 based on Foata normal form. 30/12260 useless extension candidates. Maximal degree in co-relation 85753. Up to 11203 conditions per place. [2024-06-21 18:15:49,564 INFO L140 encePairwiseOnDemand]: 41/51 looper letters, 335 selfloop transitions, 36 changer transitions 0/380 dead transitions. [2024-06-21 18:15:49,564 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 211 places, 380 transitions, 5201 flow [2024-06-21 18:15:49,564 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 18:15:49,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 18:15:49,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 215 transitions. [2024-06-21 18:15:49,565 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6022408963585434 [2024-06-21 18:15:49,565 INFO L175 Difference]: Start difference. First operand has 205 places, 330 transitions, 4088 flow. Second operand 7 states and 215 transitions. [2024-06-21 18:15:49,565 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 211 places, 380 transitions, 5201 flow [2024-06-21 18:15:50,735 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 209 places, 380 transitions, 5147 flow, removed 11 selfloop flow, removed 2 redundant places. [2024-06-21 18:15:50,740 INFO L231 Difference]: Finished difference. Result has 211 places, 336 transitions, 4198 flow [2024-06-21 18:15:50,741 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=4038, PETRI_DIFFERENCE_MINUEND_PLACES=203, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=330, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=296, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4198, PETRI_PLACES=211, PETRI_TRANSITIONS=336} [2024-06-21 18:15:50,741 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 157 predicate places. [2024-06-21 18:15:50,742 INFO L495 AbstractCegarLoop]: Abstraction has has 211 places, 336 transitions, 4198 flow [2024-06-21 18:15:50,742 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.875) internal successors, (151), 8 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:15:50,742 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:15:50,742 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:15:50,742 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2024-06-21 18:15:50,742 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 18:15:50,742 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:15:50,743 INFO L85 PathProgramCache]: Analyzing trace with hash 1660811669, now seen corresponding path program 3 times [2024-06-21 18:15:50,743 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:15:50,743 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1956202175] [2024-06-21 18:15:50,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:15:50,743 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:15:50,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:15:50,936 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:15:50,936 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:15:50,936 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1956202175] [2024-06-21 18:15:50,936 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1956202175] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:15:50,937 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:15:50,937 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 18:15:50,937 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [501377629] [2024-06-21 18:15:50,937 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:15:50,937 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 18:15:50,937 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:15:50,938 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 18:15:50,938 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-21 18:15:51,001 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 51 [2024-06-21 18:15:51,001 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 211 places, 336 transitions, 4198 flow. Second operand has 8 states, 8 states have (on average 18.875) internal successors, (151), 8 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:15:51,001 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:15:51,001 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 51 [2024-06-21 18:15:51,002 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:15:52,524 INFO L124 PetriNetUnfolderBase]: 8328/12174 cut-off events. [2024-06-21 18:15:52,524 INFO L125 PetriNetUnfolderBase]: For 587648/587670 co-relation queries the response was YES. [2024-06-21 18:15:52,630 INFO L83 FinitePrefix]: Finished finitePrefix Result has 85839 conditions, 12174 events. 8328/12174 cut-off events. For 587648/587670 co-relation queries the response was YES. Maximal size of possible extension queue 473. Compared 71819 event pairs, 2556 based on Foata normal form. 34/12204 useless extension candidates. Maximal degree in co-relation 85739. Up to 11266 conditions per place. [2024-06-21 18:15:52,689 INFO L140 encePairwiseOnDemand]: 41/51 looper letters, 334 selfloop transitions, 33 changer transitions 0/376 dead transitions. [2024-06-21 18:15:52,689 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 217 places, 376 transitions, 5073 flow [2024-06-21 18:15:52,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 18:15:52,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 18:15:52,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 210 transitions. [2024-06-21 18:15:52,690 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5882352941176471 [2024-06-21 18:15:52,690 INFO L175 Difference]: Start difference. First operand has 211 places, 336 transitions, 4198 flow. Second operand 7 states and 210 transitions. [2024-06-21 18:15:52,690 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 217 places, 376 transitions, 5073 flow [2024-06-21 18:15:53,854 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 214 places, 376 transitions, 5027 flow, removed 6 selfloop flow, removed 3 redundant places. [2024-06-21 18:15:53,859 INFO L231 Difference]: Finished difference. Result has 215 places, 337 transitions, 4244 flow [2024-06-21 18:15:53,859 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=4154, PETRI_DIFFERENCE_MINUEND_PLACES=208, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=336, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=303, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4244, PETRI_PLACES=215, PETRI_TRANSITIONS=337} [2024-06-21 18:15:53,859 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 161 predicate places. [2024-06-21 18:15:53,860 INFO L495 AbstractCegarLoop]: Abstraction has has 215 places, 337 transitions, 4244 flow [2024-06-21 18:15:53,860 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.875) internal successors, (151), 8 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:15:53,860 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:15:53,860 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:15:53,860 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2024-06-21 18:15:53,860 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 18:15:53,860 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:15:53,860 INFO L85 PathProgramCache]: Analyzing trace with hash 762384793, now seen corresponding path program 4 times [2024-06-21 18:15:53,860 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:15:53,860 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [248442632] [2024-06-21 18:15:53,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:15:53,861 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:15:53,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:15:54,025 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:15:54,025 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:15:54,025 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [248442632] [2024-06-21 18:15:54,025 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [248442632] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:15:54,025 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:15:54,025 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 18:15:54,025 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [837992904] [2024-06-21 18:15:54,025 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:15:54,026 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 18:15:54,026 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:15:54,026 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 18:15:54,026 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-21 18:15:54,068 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 51 [2024-06-21 18:15:54,069 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 215 places, 337 transitions, 4244 flow. Second operand has 8 states, 8 states have (on average 19.875) internal successors, (159), 8 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:15:54,069 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:15:54,069 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 51 [2024-06-21 18:15:54,069 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:15:55,565 INFO L124 PetriNetUnfolderBase]: 7940/11684 cut-off events. [2024-06-21 18:15:55,565 INFO L125 PetriNetUnfolderBase]: For 669523/670798 co-relation queries the response was YES. [2024-06-21 18:15:55,656 INFO L83 FinitePrefix]: Finished finitePrefix Result has 87780 conditions, 11684 events. 7940/11684 cut-off events. For 669523/670798 co-relation queries the response was YES. Maximal size of possible extension queue 478. Compared 70332 event pairs, 2308 based on Foata normal form. 115/11416 useless extension candidates. Maximal degree in co-relation 87678. Up to 10312 conditions per place. [2024-06-21 18:15:55,713 INFO L140 encePairwiseOnDemand]: 40/51 looper letters, 237 selfloop transitions, 104 changer transitions 0/381 dead transitions. [2024-06-21 18:15:55,714 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 220 places, 381 transitions, 5490 flow [2024-06-21 18:15:55,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 18:15:55,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 18:15:55,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 198 transitions. [2024-06-21 18:15:55,714 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6470588235294118 [2024-06-21 18:15:55,715 INFO L175 Difference]: Start difference. First operand has 215 places, 337 transitions, 4244 flow. Second operand 6 states and 198 transitions. [2024-06-21 18:15:55,715 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 220 places, 381 transitions, 5490 flow [2024-06-21 18:15:57,140 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 218 places, 381 transitions, 5457 flow, removed 1 selfloop flow, removed 2 redundant places. [2024-06-21 18:15:57,144 INFO L231 Difference]: Finished difference. Result has 219 places, 345 transitions, 4568 flow [2024-06-21 18:15:57,145 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=4211, PETRI_DIFFERENCE_MINUEND_PLACES=213, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=337, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=96, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=241, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=4568, PETRI_PLACES=219, PETRI_TRANSITIONS=345} [2024-06-21 18:15:57,145 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 165 predicate places. [2024-06-21 18:15:57,145 INFO L495 AbstractCegarLoop]: Abstraction has has 219 places, 345 transitions, 4568 flow [2024-06-21 18:15:57,145 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 19.875) internal successors, (159), 8 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:15:57,145 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:15:57,146 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:15:57,146 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2024-06-21 18:15:57,146 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 18:15:57,146 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:15:57,146 INFO L85 PathProgramCache]: Analyzing trace with hash -1479359109, now seen corresponding path program 5 times [2024-06-21 18:15:57,146 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:15:57,146 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [774610544] [2024-06-21 18:15:57,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:15:57,147 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:15:57,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:15:57,363 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:15:57,363 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:15:57,363 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [774610544] [2024-06-21 18:15:57,363 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [774610544] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:15:57,363 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:15:57,363 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 18:15:57,363 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [93310372] [2024-06-21 18:15:57,363 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:15:57,364 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 18:15:57,364 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:15:57,364 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 18:15:57,364 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-21 18:15:57,422 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 51 [2024-06-21 18:15:57,422 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 219 places, 345 transitions, 4568 flow. Second operand has 9 states, 9 states have (on average 18.77777777777778) internal successors, (169), 9 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:15:57,422 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:15:57,422 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 51 [2024-06-21 18:15:57,422 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:15:59,002 INFO L124 PetriNetUnfolderBase]: 7917/11661 cut-off events. [2024-06-21 18:15:59,002 INFO L125 PetriNetUnfolderBase]: For 697225/698536 co-relation queries the response was YES. [2024-06-21 18:15:59,098 INFO L83 FinitePrefix]: Finished finitePrefix Result has 88414 conditions, 11661 events. 7917/11661 cut-off events. For 697225/698536 co-relation queries the response was YES. Maximal size of possible extension queue 477. Compared 70219 event pairs, 2277 based on Foata normal form. 75/11368 useless extension candidates. Maximal degree in co-relation 88309. Up to 10477 conditions per place. [2024-06-21 18:15:59,155 INFO L140 encePairwiseOnDemand]: 40/51 looper letters, 257 selfloop transitions, 77 changer transitions 0/373 dead transitions. [2024-06-21 18:15:59,155 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 224 places, 373 transitions, 5308 flow [2024-06-21 18:15:59,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 18:15:59,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 18:15:59,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 184 transitions. [2024-06-21 18:15:59,159 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6013071895424836 [2024-06-21 18:15:59,159 INFO L175 Difference]: Start difference. First operand has 219 places, 345 transitions, 4568 flow. Second operand 6 states and 184 transitions. [2024-06-21 18:15:59,159 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 224 places, 373 transitions, 5308 flow [2024-06-21 18:16:00,418 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 221 places, 373 transitions, 5022 flow, removed 46 selfloop flow, removed 3 redundant places. [2024-06-21 18:16:00,423 INFO L231 Difference]: Finished difference. Result has 222 places, 345 transitions, 4446 flow [2024-06-21 18:16:00,423 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=4282, PETRI_DIFFERENCE_MINUEND_PLACES=216, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=345, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=77, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=268, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=4446, PETRI_PLACES=222, PETRI_TRANSITIONS=345} [2024-06-21 18:16:00,423 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 168 predicate places. [2024-06-21 18:16:00,423 INFO L495 AbstractCegarLoop]: Abstraction has has 222 places, 345 transitions, 4446 flow [2024-06-21 18:16:00,423 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 18.77777777777778) internal successors, (169), 9 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:16:00,423 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:16:00,424 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:16:00,424 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2024-06-21 18:16:00,424 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 18:16:00,424 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:16:00,424 INFO L85 PathProgramCache]: Analyzing trace with hash -1479358923, now seen corresponding path program 4 times [2024-06-21 18:16:00,424 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:16:00,424 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1882978681] [2024-06-21 18:16:00,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:16:00,424 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:16:00,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:16:00,641 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:16:00,641 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:16:00,641 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1882978681] [2024-06-21 18:16:00,641 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1882978681] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:16:00,641 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:16:00,641 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 18:16:00,641 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [984580423] [2024-06-21 18:16:00,642 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:16:00,642 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 18:16:00,642 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:16:00,642 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 18:16:00,642 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-21 18:16:00,688 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 51 [2024-06-21 18:16:00,690 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 222 places, 345 transitions, 4446 flow. Second operand has 9 states, 9 states have (on average 17.77777777777778) internal successors, (160), 9 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:16:00,690 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:16:00,690 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 51 [2024-06-21 18:16:00,690 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:16:02,324 INFO L124 PetriNetUnfolderBase]: 8367/12230 cut-off events. [2024-06-21 18:16:02,325 INFO L125 PetriNetUnfolderBase]: For 652721/652758 co-relation queries the response was YES. [2024-06-21 18:16:02,421 INFO L83 FinitePrefix]: Finished finitePrefix Result has 88108 conditions, 12230 events. 8367/12230 cut-off events. For 652721/652758 co-relation queries the response was YES. Maximal size of possible extension queue 474. Compared 72179 event pairs, 2609 based on Foata normal form. 35/12261 useless extension candidates. Maximal degree in co-relation 88002. Up to 11247 conditions per place. [2024-06-21 18:16:02,477 INFO L140 encePairwiseOnDemand]: 40/51 looper letters, 314 selfloop transitions, 57 changer transitions 0/379 dead transitions. [2024-06-21 18:16:02,478 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 227 places, 379 transitions, 5466 flow [2024-06-21 18:16:02,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 18:16:02,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 18:16:02,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 184 transitions. [2024-06-21 18:16:02,479 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6013071895424836 [2024-06-21 18:16:02,479 INFO L175 Difference]: Start difference. First operand has 222 places, 345 transitions, 4446 flow. Second operand 6 states and 184 transitions. [2024-06-21 18:16:02,479 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 227 places, 379 transitions, 5466 flow [2024-06-21 18:16:03,933 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 221 places, 379 transitions, 5242 flow, removed 8 selfloop flow, removed 6 redundant places. [2024-06-21 18:16:03,937 INFO L231 Difference]: Finished difference. Result has 222 places, 345 transitions, 4352 flow [2024-06-21 18:16:03,937 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=4224, PETRI_DIFFERENCE_MINUEND_PLACES=216, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=345, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=57, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=288, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=4352, PETRI_PLACES=222, PETRI_TRANSITIONS=345} [2024-06-21 18:16:03,938 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 168 predicate places. [2024-06-21 18:16:03,938 INFO L495 AbstractCegarLoop]: Abstraction has has 222 places, 345 transitions, 4352 flow [2024-06-21 18:16:03,938 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 17.77777777777778) internal successors, (160), 9 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:16:03,938 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:16:03,938 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:16:03,938 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2024-06-21 18:16:03,938 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 18:16:03,938 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:16:03,938 INFO L85 PathProgramCache]: Analyzing trace with hash -1474116699, now seen corresponding path program 6 times [2024-06-21 18:16:03,938 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:16:03,939 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [933967250] [2024-06-21 18:16:03,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:16:03,939 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:16:03,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:16:04,126 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:16:04,126 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:16:04,126 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [933967250] [2024-06-21 18:16:04,126 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [933967250] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:16:04,126 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:16:04,126 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 18:16:04,126 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1424523040] [2024-06-21 18:16:04,126 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:16:04,127 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 18:16:04,127 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:16:04,127 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 18:16:04,127 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-21 18:16:04,183 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 51 [2024-06-21 18:16:04,183 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 222 places, 345 transitions, 4352 flow. Second operand has 9 states, 9 states have (on average 18.77777777777778) internal successors, (169), 9 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:16:04,183 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:16:04,183 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 51 [2024-06-21 18:16:04,183 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:16:05,798 INFO L124 PetriNetUnfolderBase]: 7937/11692 cut-off events. [2024-06-21 18:16:05,798 INFO L125 PetriNetUnfolderBase]: For 752617/753955 co-relation queries the response was YES. [2024-06-21 18:16:05,892 INFO L83 FinitePrefix]: Finished finitePrefix Result has 89464 conditions, 11692 events. 7937/11692 cut-off events. For 752617/753955 co-relation queries the response was YES. Maximal size of possible extension queue 476. Compared 70486 event pairs, 2277 based on Foata normal form. 155/11479 useless extension candidates. Maximal degree in co-relation 89358. Up to 10316 conditions per place. [2024-06-21 18:16:05,950 INFO L140 encePairwiseOnDemand]: 40/51 looper letters, 244 selfloop transitions, 116 changer transitions 0/399 dead transitions. [2024-06-21 18:16:05,950 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 229 places, 399 transitions, 5618 flow [2024-06-21 18:16:05,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 18:16:05,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 18:16:05,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 250 transitions. [2024-06-21 18:16:05,951 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6127450980392157 [2024-06-21 18:16:05,951 INFO L175 Difference]: Start difference. First operand has 222 places, 345 transitions, 4352 flow. Second operand 8 states and 250 transitions. [2024-06-21 18:16:05,951 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 229 places, 399 transitions, 5618 flow [2024-06-21 18:16:07,471 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 224 places, 399 transitions, 5468 flow, removed 0 selfloop flow, removed 5 redundant places. [2024-06-21 18:16:07,476 INFO L231 Difference]: Finished difference. Result has 225 places, 349 transitions, 4505 flow [2024-06-21 18:16:07,476 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=4202, PETRI_DIFFERENCE_MINUEND_PLACES=217, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=345, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=112, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=233, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4505, PETRI_PLACES=225, PETRI_TRANSITIONS=349} [2024-06-21 18:16:07,476 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 171 predicate places. [2024-06-21 18:16:07,476 INFO L495 AbstractCegarLoop]: Abstraction has has 225 places, 349 transitions, 4505 flow [2024-06-21 18:16:07,477 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 18.77777777777778) internal successors, (169), 9 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:16:07,477 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:16:07,477 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:16:07,477 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2024-06-21 18:16:07,477 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 18:16:07,477 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:16:07,477 INFO L85 PathProgramCache]: Analyzing trace with hash -1473818169, now seen corresponding path program 7 times [2024-06-21 18:16:07,477 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:16:07,477 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1014090548] [2024-06-21 18:16:07,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:16:07,477 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:16:07,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:16:07,651 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:16:07,651 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:16:07,651 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1014090548] [2024-06-21 18:16:07,652 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1014090548] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:16:07,652 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:16:07,652 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 18:16:07,652 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [660349400] [2024-06-21 18:16:07,652 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:16:07,652 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 18:16:07,652 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:16:07,653 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 18:16:07,653 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-21 18:16:07,710 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 51 [2024-06-21 18:16:07,711 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 225 places, 349 transitions, 4505 flow. Second operand has 9 states, 9 states have (on average 18.77777777777778) internal successors, (169), 9 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:16:07,711 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:16:07,711 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 51 [2024-06-21 18:16:07,711 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:16:09,353 INFO L124 PetriNetUnfolderBase]: 7960/11729 cut-off events. [2024-06-21 18:16:09,354 INFO L125 PetriNetUnfolderBase]: For 783711/785080 co-relation queries the response was YES. [2024-06-21 18:16:09,450 INFO L83 FinitePrefix]: Finished finitePrefix Result has 90597 conditions, 11729 events. 7960/11729 cut-off events. For 783711/785080 co-relation queries the response was YES. Maximal size of possible extension queue 478. Compared 70669 event pairs, 2276 based on Foata normal form. 189/11550 useless extension candidates. Maximal degree in co-relation 90490. Up to 10339 conditions per place. [2024-06-21 18:16:09,508 INFO L140 encePairwiseOnDemand]: 40/51 looper letters, 241 selfloop transitions, 123 changer transitions 0/403 dead transitions. [2024-06-21 18:16:09,508 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 233 places, 403 transitions, 5615 flow [2024-06-21 18:16:09,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 18:16:09,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 18:16:09,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 270 transitions. [2024-06-21 18:16:09,509 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5882352941176471 [2024-06-21 18:16:09,509 INFO L175 Difference]: Start difference. First operand has 225 places, 349 transitions, 4505 flow. Second operand 9 states and 270 transitions. [2024-06-21 18:16:09,509 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 233 places, 403 transitions, 5615 flow [2024-06-21 18:16:11,020 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 227 places, 403 transitions, 5270 flow, removed 31 selfloop flow, removed 6 redundant places. [2024-06-21 18:16:11,025 INFO L231 Difference]: Finished difference. Result has 228 places, 353 transitions, 4486 flow [2024-06-21 18:16:11,025 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=4178, PETRI_DIFFERENCE_MINUEND_PLACES=219, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=349, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=119, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=230, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4486, PETRI_PLACES=228, PETRI_TRANSITIONS=353} [2024-06-21 18:16:11,025 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 174 predicate places. [2024-06-21 18:16:11,025 INFO L495 AbstractCegarLoop]: Abstraction has has 228 places, 353 transitions, 4486 flow [2024-06-21 18:16:11,025 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 18.77777777777778) internal successors, (169), 9 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:16:11,025 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:16:11,025 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:16:11,025 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2024-06-21 18:16:11,026 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 18:16:11,026 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:16:11,026 INFO L85 PathProgramCache]: Analyzing trace with hash -525431883, now seen corresponding path program 5 times [2024-06-21 18:16:11,026 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:16:11,026 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [820175154] [2024-06-21 18:16:11,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:16:11,026 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:16:11,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:16:11,241 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:16:11,242 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:16:11,242 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [820175154] [2024-06-21 18:16:11,242 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [820175154] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:16:11,242 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:16:11,242 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 18:16:11,242 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [808678933] [2024-06-21 18:16:11,243 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:16:11,243 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 18:16:11,243 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:16:11,243 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 18:16:11,243 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-21 18:16:11,290 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 51 [2024-06-21 18:16:11,290 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 228 places, 353 transitions, 4486 flow. Second operand has 9 states, 9 states have (on average 17.77777777777778) internal successors, (160), 9 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:16:11,290 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:16:11,290 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 51 [2024-06-21 18:16:11,290 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:16:12,916 INFO L124 PetriNetUnfolderBase]: 8429/12333 cut-off events. [2024-06-21 18:16:12,917 INFO L125 PetriNetUnfolderBase]: For 734171/734208 co-relation queries the response was YES. [2024-06-21 18:16:13,013 INFO L83 FinitePrefix]: Finished finitePrefix Result has 90612 conditions, 12333 events. 8429/12333 cut-off events. For 734171/734208 co-relation queries the response was YES. Maximal size of possible extension queue 482. Compared 73021 event pairs, 2608 based on Foata normal form. 35/12364 useless extension candidates. Maximal degree in co-relation 90504. Up to 11324 conditions per place. [2024-06-21 18:16:13,070 INFO L140 encePairwiseOnDemand]: 41/51 looper letters, 318 selfloop transitions, 61 changer transitions 0/387 dead transitions. [2024-06-21 18:16:13,070 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 232 places, 387 transitions, 5581 flow [2024-06-21 18:16:13,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-21 18:16:13,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-21 18:16:13,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 159 transitions. [2024-06-21 18:16:13,071 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6235294117647059 [2024-06-21 18:16:13,071 INFO L175 Difference]: Start difference. First operand has 228 places, 353 transitions, 4486 flow. Second operand 5 states and 159 transitions. [2024-06-21 18:16:13,071 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 232 places, 387 transitions, 5581 flow [2024-06-21 18:16:14,936 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 226 places, 387 transitions, 5337 flow, removed 16 selfloop flow, removed 6 redundant places. [2024-06-21 18:16:14,940 INFO L231 Difference]: Finished difference. Result has 228 places, 358 transitions, 4493 flow [2024-06-21 18:16:14,941 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=4244, PETRI_DIFFERENCE_MINUEND_PLACES=222, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=353, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=56, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=296, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=4493, PETRI_PLACES=228, PETRI_TRANSITIONS=358} [2024-06-21 18:16:14,941 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 174 predicate places. [2024-06-21 18:16:14,941 INFO L495 AbstractCegarLoop]: Abstraction has has 228 places, 358 transitions, 4493 flow [2024-06-21 18:16:14,941 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 17.77777777777778) internal successors, (160), 9 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:16:14,941 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:16:14,941 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:16:14,941 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2024-06-21 18:16:14,941 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 18:16:14,942 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:16:14,942 INFO L85 PathProgramCache]: Analyzing trace with hash -525426489, now seen corresponding path program 8 times [2024-06-21 18:16:14,942 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:16:14,942 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [896746431] [2024-06-21 18:16:14,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:16:14,942 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:16:14,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:16:15,140 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:16:15,140 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:16:15,140 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [896746431] [2024-06-21 18:16:15,141 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [896746431] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:16:15,141 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:16:15,141 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 18:16:15,141 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [566622419] [2024-06-21 18:16:15,141 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:16:15,141 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 18:16:15,141 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:16:15,141 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 18:16:15,141 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 18:16:15,204 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 51 [2024-06-21 18:16:15,204 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 228 places, 358 transitions, 4493 flow. Second operand has 9 states, 9 states have (on average 18.77777777777778) internal successors, (169), 9 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:16:15,204 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:16:15,204 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 51 [2024-06-21 18:16:15,204 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:16:16,793 INFO L124 PetriNetUnfolderBase]: 7953/11724 cut-off events. [2024-06-21 18:16:16,793 INFO L125 PetriNetUnfolderBase]: For 829633/830934 co-relation queries the response was YES. [2024-06-21 18:16:16,885 INFO L83 FinitePrefix]: Finished finitePrefix Result has 91448 conditions, 11724 events. 7953/11724 cut-off events. For 829633/830934 co-relation queries the response was YES. Maximal size of possible extension queue 477. Compared 70707 event pairs, 2276 based on Foata normal form. 128/11484 useless extension candidates. Maximal degree in co-relation 91338. Up to 10388 conditions per place. [2024-06-21 18:16:16,942 INFO L140 encePairwiseOnDemand]: 40/51 looper letters, 250 selfloop transitions, 105 changer transitions 0/395 dead transitions. [2024-06-21 18:16:16,942 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 233 places, 395 transitions, 5489 flow [2024-06-21 18:16:16,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 18:16:16,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 18:16:16,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 195 transitions. [2024-06-21 18:16:16,943 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6372549019607843 [2024-06-21 18:16:16,944 INFO L175 Difference]: Start difference. First operand has 228 places, 358 transitions, 4493 flow. Second operand 6 states and 195 transitions. [2024-06-21 18:16:16,944 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 233 places, 395 transitions, 5489 flow [2024-06-21 18:16:18,795 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 229 places, 395 transitions, 5336 flow, removed 32 selfloop flow, removed 4 redundant places. [2024-06-21 18:16:18,799 INFO L231 Difference]: Finished difference. Result has 230 places, 358 transitions, 4574 flow [2024-06-21 18:16:18,799 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=4348, PETRI_DIFFERENCE_MINUEND_PLACES=224, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=358, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=105, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=253, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=4574, PETRI_PLACES=230, PETRI_TRANSITIONS=358} [2024-06-21 18:16:18,800 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 176 predicate places. [2024-06-21 18:16:18,800 INFO L495 AbstractCegarLoop]: Abstraction has has 230 places, 358 transitions, 4574 flow [2024-06-21 18:16:18,800 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 18.77777777777778) internal successors, (169), 9 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:16:18,800 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:16:18,800 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:16:18,800 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2024-06-21 18:16:18,800 INFO L420 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 18:16:18,800 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:16:18,800 INFO L85 PathProgramCache]: Analyzing trace with hash -525432069, now seen corresponding path program 9 times [2024-06-21 18:16:18,801 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:16:18,801 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [617416631] [2024-06-21 18:16:18,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:16:18,801 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:16:18,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:16:19,019 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:16:19,020 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:16:19,020 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [617416631] [2024-06-21 18:16:19,020 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [617416631] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:16:19,020 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:16:19,020 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 18:16:19,020 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [995015144] [2024-06-21 18:16:19,020 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:16:19,020 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 18:16:19,020 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:16:19,020 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 18:16:19,021 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 18:16:19,069 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 51 [2024-06-21 18:16:19,070 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 230 places, 358 transitions, 4574 flow. Second operand has 9 states, 9 states have (on average 18.77777777777778) internal successors, (169), 9 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:16:19,070 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:16:19,070 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 51 [2024-06-21 18:16:19,070 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:16:20,684 INFO L124 PetriNetUnfolderBase]: 7942/11710 cut-off events. [2024-06-21 18:16:20,685 INFO L125 PetriNetUnfolderBase]: For 803101/804395 co-relation queries the response was YES. [2024-06-21 18:16:20,780 INFO L83 FinitePrefix]: Finished finitePrefix Result has 90627 conditions, 11710 events. 7942/11710 cut-off events. For 803101/804395 co-relation queries the response was YES. Maximal size of possible extension queue 476. Compared 70739 event pairs, 2275 based on Foata normal form. 128/11470 useless extension candidates. Maximal degree in co-relation 90518. Up to 10378 conditions per place. [2024-06-21 18:16:20,839 INFO L140 encePairwiseOnDemand]: 40/51 looper letters, 255 selfloop transitions, 105 changer transitions 0/400 dead transitions. [2024-06-21 18:16:20,839 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 236 places, 400 transitions, 5404 flow [2024-06-21 18:16:20,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 18:16:20,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 18:16:20,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 221 transitions. [2024-06-21 18:16:20,844 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6190476190476191 [2024-06-21 18:16:20,844 INFO L175 Difference]: Start difference. First operand has 230 places, 358 transitions, 4574 flow. Second operand 7 states and 221 transitions. [2024-06-21 18:16:20,844 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 236 places, 400 transitions, 5404 flow [2024-06-21 18:16:22,456 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 229 places, 400 transitions, 5124 flow, removed 14 selfloop flow, removed 7 redundant places. [2024-06-21 18:16:22,460 INFO L231 Difference]: Finished difference. Result has 230 places, 358 transitions, 4526 flow [2024-06-21 18:16:22,460 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=4294, PETRI_DIFFERENCE_MINUEND_PLACES=223, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=358, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=105, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=253, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4526, PETRI_PLACES=230, PETRI_TRANSITIONS=358} [2024-06-21 18:16:22,461 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 176 predicate places. [2024-06-21 18:16:22,461 INFO L495 AbstractCegarLoop]: Abstraction has has 230 places, 358 transitions, 4526 flow [2024-06-21 18:16:22,461 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 18.77777777777778) internal successors, (169), 9 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:16:22,461 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:16:22,461 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:16:22,461 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2024-06-21 18:16:22,462 INFO L420 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 18:16:22,462 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:16:22,462 INFO L85 PathProgramCache]: Analyzing trace with hash -525420723, now seen corresponding path program 6 times [2024-06-21 18:16:22,462 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:16:22,462 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1471450852] [2024-06-21 18:16:22,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:16:22,462 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:16:22,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:16:22,649 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:16:22,649 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:16:22,649 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1471450852] [2024-06-21 18:16:22,649 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1471450852] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:16:22,649 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:16:22,649 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 18:16:22,649 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1050550667] [2024-06-21 18:16:22,650 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:16:22,650 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 18:16:22,650 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:16:22,651 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 18:16:22,652 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-21 18:16:22,699 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 51 [2024-06-21 18:16:22,700 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 230 places, 358 transitions, 4526 flow. Second operand has 9 states, 9 states have (on average 17.77777777777778) internal successors, (160), 9 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:16:22,700 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:16:22,700 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 51 [2024-06-21 18:16:22,700 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:16:24,341 INFO L124 PetriNetUnfolderBase]: 8400/12292 cut-off events. [2024-06-21 18:16:24,342 INFO L125 PetriNetUnfolderBase]: For 725986/726025 co-relation queries the response was YES. [2024-06-21 18:16:24,434 INFO L83 FinitePrefix]: Finished finitePrefix Result has 89932 conditions, 12292 events. 8400/12292 cut-off events. For 725986/726025 co-relation queries the response was YES. Maximal size of possible extension queue 479. Compared 72736 event pairs, 2591 based on Foata normal form. 37/12326 useless extension candidates. Maximal degree in co-relation 89823. Up to 11289 conditions per place. [2024-06-21 18:16:24,489 INFO L140 encePairwiseOnDemand]: 41/51 looper letters, 320 selfloop transitions, 66 changer transitions 0/394 dead transitions. [2024-06-21 18:16:24,489 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 236 places, 394 transitions, 5408 flow [2024-06-21 18:16:24,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 18:16:24,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 18:16:24,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 206 transitions. [2024-06-21 18:16:24,490 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5770308123249299 [2024-06-21 18:16:24,490 INFO L175 Difference]: Start difference. First operand has 230 places, 358 transitions, 4526 flow. Second operand 7 states and 206 transitions. [2024-06-21 18:16:24,490 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 236 places, 394 transitions, 5408 flow [2024-06-21 18:16:26,086 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 228 places, 394 transitions, 5164 flow, removed 11 selfloop flow, removed 8 redundant places. [2024-06-21 18:16:26,091 INFO L231 Difference]: Finished difference. Result has 229 places, 359 transitions, 4441 flow [2024-06-21 18:16:26,091 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=4284, PETRI_DIFFERENCE_MINUEND_PLACES=222, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=358, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=65, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=293, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4441, PETRI_PLACES=229, PETRI_TRANSITIONS=359} [2024-06-21 18:16:26,091 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 175 predicate places. [2024-06-21 18:16:26,091 INFO L495 AbstractCegarLoop]: Abstraction has has 229 places, 359 transitions, 4441 flow [2024-06-21 18:16:26,092 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 17.77777777777778) internal successors, (160), 9 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:16:26,092 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:16:26,092 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:16:26,092 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2024-06-21 18:16:26,092 INFO L420 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 18:16:26,092 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:16:26,093 INFO L85 PathProgramCache]: Analyzing trace with hash -727576499, now seen corresponding path program 7 times [2024-06-21 18:16:26,093 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:16:26,093 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [106217255] [2024-06-21 18:16:26,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:16:26,093 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:16:26,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:16:26,246 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:16:26,246 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:16:26,246 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [106217255] [2024-06-21 18:16:26,246 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [106217255] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:16:26,246 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:16:26,246 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 18:16:26,246 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [185522282] [2024-06-21 18:16:26,246 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:16:26,247 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 18:16:26,250 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:16:26,251 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 18:16:26,251 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2024-06-21 18:16:26,294 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 51 [2024-06-21 18:16:26,294 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 229 places, 359 transitions, 4441 flow. Second operand has 8 states, 8 states have (on average 18.875) internal successors, (151), 8 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:16:26,294 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:16:26,294 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 51 [2024-06-21 18:16:26,294 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:16:27,836 INFO L124 PetriNetUnfolderBase]: 8416/12313 cut-off events. [2024-06-21 18:16:27,836 INFO L125 PetriNetUnfolderBase]: For 699498/699524 co-relation queries the response was YES. [2024-06-21 18:16:27,929 INFO L83 FinitePrefix]: Finished finitePrefix Result has 89308 conditions, 12313 events. 8416/12313 cut-off events. For 699498/699524 co-relation queries the response was YES. Maximal size of possible extension queue 481. Compared 72889 event pairs, 2643 based on Foata normal form. 19/12328 useless extension candidates. Maximal degree in co-relation 89201. Up to 11216 conditions per place. [2024-06-21 18:16:27,984 INFO L140 encePairwiseOnDemand]: 41/51 looper letters, 292 selfloop transitions, 91 changer transitions 0/392 dead transitions. [2024-06-21 18:16:27,984 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 234 places, 392 transitions, 5533 flow [2024-06-21 18:16:27,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 18:16:27,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 18:16:27,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 182 transitions. [2024-06-21 18:16:27,985 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5947712418300654 [2024-06-21 18:16:27,985 INFO L175 Difference]: Start difference. First operand has 229 places, 359 transitions, 4441 flow. Second operand 6 states and 182 transitions. [2024-06-21 18:16:27,985 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 234 places, 392 transitions, 5533 flow [2024-06-21 18:16:29,474 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 229 places, 392 transitions, 5391 flow, removed 10 selfloop flow, removed 5 redundant places. [2024-06-21 18:16:29,478 INFO L231 Difference]: Finished difference. Result has 231 places, 365 transitions, 4607 flow [2024-06-21 18:16:29,478 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=4303, PETRI_DIFFERENCE_MINUEND_PLACES=224, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=359, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=85, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=273, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=4607, PETRI_PLACES=231, PETRI_TRANSITIONS=365} [2024-06-21 18:16:29,479 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 177 predicate places. [2024-06-21 18:16:29,479 INFO L495 AbstractCegarLoop]: Abstraction has has 231 places, 365 transitions, 4607 flow [2024-06-21 18:16:29,479 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.875) internal successors, (151), 8 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:16:29,479 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:16:29,479 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:16:29,479 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2024-06-21 18:16:29,480 INFO L420 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 18:16:29,480 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:16:29,480 INFO L85 PathProgramCache]: Analyzing trace with hash -738538409, now seen corresponding path program 8 times [2024-06-21 18:16:29,480 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:16:29,480 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [295016089] [2024-06-21 18:16:29,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:16:29,480 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:16:29,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:16:29,633 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:16:29,633 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:16:29,633 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [295016089] [2024-06-21 18:16:29,633 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [295016089] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:16:29,633 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:16:29,633 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 18:16:29,633 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1986413766] [2024-06-21 18:16:29,633 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:16:29,633 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 18:16:29,634 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:16:29,634 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 18:16:29,634 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2024-06-21 18:16:29,685 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 51 [2024-06-21 18:16:29,685 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 231 places, 365 transitions, 4607 flow. Second operand has 8 states, 8 states have (on average 18.875) internal successors, (151), 8 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:16:29,685 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:16:29,685 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 51 [2024-06-21 18:16:29,685 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:16:31,265 INFO L124 PetriNetUnfolderBase]: 8432/12338 cut-off events. [2024-06-21 18:16:31,266 INFO L125 PetriNetUnfolderBase]: For 698855/698892 co-relation queries the response was YES. [2024-06-21 18:16:31,363 INFO L83 FinitePrefix]: Finished finitePrefix Result has 89779 conditions, 12338 events. 8432/12338 cut-off events. For 698855/698892 co-relation queries the response was YES. Maximal size of possible extension queue 482. Compared 73126 event pairs, 2607 based on Foata normal form. 35/12369 useless extension candidates. Maximal degree in co-relation 89670. Up to 11233 conditions per place. [2024-06-21 18:16:31,419 INFO L140 encePairwiseOnDemand]: 41/51 looper letters, 300 selfloop transitions, 96 changer transitions 0/405 dead transitions. [2024-06-21 18:16:31,419 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 236 places, 405 transitions, 5740 flow [2024-06-21 18:16:31,419 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 18:16:31,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 18:16:31,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 192 transitions. [2024-06-21 18:16:31,419 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6274509803921569 [2024-06-21 18:16:31,420 INFO L175 Difference]: Start difference. First operand has 231 places, 365 transitions, 4607 flow. Second operand 6 states and 192 transitions. [2024-06-21 18:16:31,420 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 236 places, 405 transitions, 5740 flow [2024-06-21 18:16:33,160 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 234 places, 405 transitions, 5603 flow, removed 23 selfloop flow, removed 2 redundant places. [2024-06-21 18:16:33,164 INFO L231 Difference]: Finished difference. Result has 235 places, 369 transitions, 4741 flow [2024-06-21 18:16:33,165 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=4484, PETRI_DIFFERENCE_MINUEND_PLACES=229, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=365, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=92, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=273, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=4741, PETRI_PLACES=235, PETRI_TRANSITIONS=369} [2024-06-21 18:16:33,165 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 181 predicate places. [2024-06-21 18:16:33,165 INFO L495 AbstractCegarLoop]: Abstraction has has 235 places, 369 transitions, 4741 flow [2024-06-21 18:16:33,165 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.875) internal successors, (151), 8 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:16:33,165 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:16:33,165 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:16:33,165 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2024-06-21 18:16:33,165 INFO L420 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 18:16:33,166 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:16:33,166 INFO L85 PathProgramCache]: Analyzing trace with hash -738538595, now seen corresponding path program 10 times [2024-06-21 18:16:33,166 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:16:33,166 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [740603494] [2024-06-21 18:16:33,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:16:33,166 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:16:33,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:16:33,324 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:16:33,325 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:16:33,325 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [740603494] [2024-06-21 18:16:33,325 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [740603494] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:16:33,325 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:16:33,325 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 18:16:33,325 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [214601387] [2024-06-21 18:16:33,325 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:16:33,325 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 18:16:33,325 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:16:33,326 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 18:16:33,326 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-21 18:16:33,377 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 51 [2024-06-21 18:16:33,378 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 235 places, 369 transitions, 4741 flow. Second operand has 8 states, 8 states have (on average 19.875) internal successors, (159), 8 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:16:33,378 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:16:33,378 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 51 [2024-06-21 18:16:33,378 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:16:34,952 INFO L124 PetriNetUnfolderBase]: 7958/11736 cut-off events. [2024-06-21 18:16:34,952 INFO L125 PetriNetUnfolderBase]: For 798355/799649 co-relation queries the response was YES. [2024-06-21 18:16:35,050 INFO L83 FinitePrefix]: Finished finitePrefix Result has 90635 conditions, 11736 events. 7958/11736 cut-off events. For 798355/799649 co-relation queries the response was YES. Maximal size of possible extension queue 475. Compared 70880 event pairs, 2274 based on Foata normal form. 151/11519 useless extension candidates. Maximal degree in co-relation 90524. Up to 10297 conditions per place. [2024-06-21 18:16:35,108 INFO L140 encePairwiseOnDemand]: 40/51 looper letters, 226 selfloop transitions, 147 changer transitions 0/418 dead transitions. [2024-06-21 18:16:35,108 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 242 places, 418 transitions, 5615 flow [2024-06-21 18:16:35,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 18:16:35,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 18:16:35,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 257 transitions. [2024-06-21 18:16:35,109 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6299019607843137 [2024-06-21 18:16:35,109 INFO L175 Difference]: Start difference. First operand has 235 places, 369 transitions, 4741 flow. Second operand 8 states and 257 transitions. [2024-06-21 18:16:35,109 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 242 places, 418 transitions, 5615 flow [2024-06-21 18:16:37,072 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 237 places, 418 transitions, 5414 flow, removed 23 selfloop flow, removed 5 redundant places. [2024-06-21 18:16:37,077 INFO L231 Difference]: Finished difference. Result has 238 places, 369 transitions, 4862 flow [2024-06-21 18:16:37,077 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=4540, PETRI_DIFFERENCE_MINUEND_PLACES=230, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=369, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=147, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=222, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4862, PETRI_PLACES=238, PETRI_TRANSITIONS=369} [2024-06-21 18:16:37,078 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 184 predicate places. [2024-06-21 18:16:37,078 INFO L495 AbstractCegarLoop]: Abstraction has has 238 places, 369 transitions, 4862 flow [2024-06-21 18:16:37,078 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 19.875) internal successors, (159), 8 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:16:37,078 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:16:37,078 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:16:37,078 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2024-06-21 18:16:37,078 INFO L420 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 18:16:37,078 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:16:37,078 INFO L85 PathProgramCache]: Analyzing trace with hash -738301259, now seen corresponding path program 9 times [2024-06-21 18:16:37,079 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:16:37,079 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1963988155] [2024-06-21 18:16:37,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:16:37,079 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:16:37,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:16:37,231 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:16:37,231 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:16:37,232 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1963988155] [2024-06-21 18:16:37,232 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1963988155] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:16:37,232 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:16:37,232 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 18:16:37,232 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [202488648] [2024-06-21 18:16:37,232 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:16:37,232 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 18:16:37,232 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:16:37,233 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 18:16:37,233 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2024-06-21 18:16:37,279 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 51 [2024-06-21 18:16:37,279 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 238 places, 369 transitions, 4862 flow. Second operand has 8 states, 8 states have (on average 18.875) internal successors, (151), 8 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:16:37,279 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:16:37,279 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 51 [2024-06-21 18:16:37,279 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:16:38,858 INFO L124 PetriNetUnfolderBase]: 8414/12315 cut-off events. [2024-06-21 18:16:38,858 INFO L125 PetriNetUnfolderBase]: For 695795/695832 co-relation queries the response was YES. [2024-06-21 18:16:38,953 INFO L83 FinitePrefix]: Finished finitePrefix Result has 89603 conditions, 12315 events. 8414/12315 cut-off events. For 695795/695832 co-relation queries the response was YES. Maximal size of possible extension queue 482. Compared 72917 event pairs, 2606 based on Foata normal form. 35/12346 useless extension candidates. Maximal degree in co-relation 89493. Up to 11212 conditions per place. [2024-06-21 18:16:39,009 INFO L140 encePairwiseOnDemand]: 41/51 looper letters, 295 selfloop transitions, 96 changer transitions 0/400 dead transitions. [2024-06-21 18:16:39,010 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 243 places, 400 transitions, 5731 flow [2024-06-21 18:16:39,010 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 18:16:39,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 18:16:39,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 186 transitions. [2024-06-21 18:16:39,010 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6078431372549019 [2024-06-21 18:16:39,010 INFO L175 Difference]: Start difference. First operand has 238 places, 369 transitions, 4862 flow. Second operand 6 states and 186 transitions. [2024-06-21 18:16:39,010 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 243 places, 400 transitions, 5731 flow [2024-06-21 18:16:40,732 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 235 places, 400 transitions, 5405 flow, removed 13 selfloop flow, removed 8 redundant places. [2024-06-21 18:16:40,737 INFO L231 Difference]: Finished difference. Result has 236 places, 369 transitions, 4742 flow [2024-06-21 18:16:40,737 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=4536, PETRI_DIFFERENCE_MINUEND_PLACES=230, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=369, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=96, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=273, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=4742, PETRI_PLACES=236, PETRI_TRANSITIONS=369} [2024-06-21 18:16:40,737 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 182 predicate places. [2024-06-21 18:16:40,738 INFO L495 AbstractCegarLoop]: Abstraction has has 236 places, 369 transitions, 4742 flow [2024-06-21 18:16:40,738 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.875) internal successors, (151), 8 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:16:40,738 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:16:40,738 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:16:40,738 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2024-06-21 18:16:40,738 INFO L420 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 18:16:40,738 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:16:40,738 INFO L85 PathProgramCache]: Analyzing trace with hash -727579475, now seen corresponding path program 4 times [2024-06-21 18:16:40,738 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:16:40,739 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1763704374] [2024-06-21 18:16:40,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:16:40,739 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:16:40,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:16:40,910 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:16:40,910 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:16:40,910 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1763704374] [2024-06-21 18:16:40,910 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1763704374] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:16:40,910 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:16:40,910 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 18:16:40,910 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [342495609] [2024-06-21 18:16:40,911 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:16:40,911 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 18:16:40,911 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:16:40,911 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 18:16:40,911 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-21 18:16:40,957 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 51 [2024-06-21 18:16:40,957 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 236 places, 369 transitions, 4742 flow. Second operand has 8 states, 8 states have (on average 18.875) internal successors, (151), 8 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:16:40,957 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:16:40,957 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 51 [2024-06-21 18:16:40,957 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:16:42,587 INFO L124 PetriNetUnfolderBase]: 8512/12452 cut-off events. [2024-06-21 18:16:42,588 INFO L125 PetriNetUnfolderBase]: For 657013/657027 co-relation queries the response was YES. [2024-06-21 18:16:42,699 INFO L83 FinitePrefix]: Finished finitePrefix Result has 88898 conditions, 12452 events. 8512/12452 cut-off events. For 657013/657027 co-relation queries the response was YES. Maximal size of possible extension queue 493. Compared 73835 event pairs, 2577 based on Foata normal form. 21/12469 useless extension candidates. Maximal degree in co-relation 88788. Up to 11518 conditions per place. [2024-06-21 18:16:42,759 INFO L140 encePairwiseOnDemand]: 42/51 looper letters, 358 selfloop transitions, 33 changer transitions 0/400 dead transitions. [2024-06-21 18:16:42,759 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 241 places, 400 transitions, 5649 flow [2024-06-21 18:16:42,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 18:16:42,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 18:16:42,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 179 transitions. [2024-06-21 18:16:42,760 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5849673202614379 [2024-06-21 18:16:42,760 INFO L175 Difference]: Start difference. First operand has 236 places, 369 transitions, 4742 flow. Second operand 6 states and 179 transitions. [2024-06-21 18:16:42,760 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 241 places, 400 transitions, 5649 flow [2024-06-21 18:16:44,197 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 236 places, 400 transitions, 5454 flow, removed 2 selfloop flow, removed 5 redundant places. [2024-06-21 18:16:44,201 INFO L231 Difference]: Finished difference. Result has 237 places, 371 transitions, 4651 flow [2024-06-21 18:16:44,202 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=4547, PETRI_DIFFERENCE_MINUEND_PLACES=231, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=369, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=336, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=4651, PETRI_PLACES=237, PETRI_TRANSITIONS=371} [2024-06-21 18:16:44,202 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 183 predicate places. [2024-06-21 18:16:44,202 INFO L495 AbstractCegarLoop]: Abstraction has has 237 places, 371 transitions, 4651 flow [2024-06-21 18:16:44,202 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.875) internal successors, (151), 8 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:16:44,202 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:16:44,202 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:16:44,202 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2024-06-21 18:16:44,203 INFO L420 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 18:16:44,203 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:16:44,203 INFO L85 PathProgramCache]: Analyzing trace with hash -738304235, now seen corresponding path program 5 times [2024-06-21 18:16:44,203 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:16:44,203 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1390159377] [2024-06-21 18:16:44,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:16:44,203 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:16:44,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:16:44,377 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:16:44,378 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:16:44,378 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1390159377] [2024-06-21 18:16:44,378 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1390159377] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:16:44,378 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:16:44,378 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 18:16:44,378 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1589261418] [2024-06-21 18:16:44,378 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:16:44,378 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 18:16:44,378 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:16:44,378 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 18:16:44,379 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-21 18:16:44,419 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 51 [2024-06-21 18:16:44,420 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 237 places, 371 transitions, 4651 flow. Second operand has 8 states, 8 states have (on average 18.875) internal successors, (151), 8 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:16:44,420 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:16:44,420 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 51 [2024-06-21 18:16:44,420 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:16:46,080 INFO L124 PetriNetUnfolderBase]: 8571/12550 cut-off events. [2024-06-21 18:16:46,080 INFO L125 PetriNetUnfolderBase]: For 652281/652303 co-relation queries the response was YES. [2024-06-21 18:16:46,196 INFO L83 FinitePrefix]: Finished finitePrefix Result has 89051 conditions, 12550 events. 8571/12550 cut-off events. For 652281/652303 co-relation queries the response was YES. Maximal size of possible extension queue 500. Compared 74418 event pairs, 2578 based on Foata normal form. 34/12580 useless extension candidates. Maximal degree in co-relation 88941. Up to 11511 conditions per place. [2024-06-21 18:16:46,257 INFO L140 encePairwiseOnDemand]: 42/51 looper letters, 364 selfloop transitions, 35 changer transitions 0/408 dead transitions. [2024-06-21 18:16:46,257 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 242 places, 408 transitions, 5594 flow [2024-06-21 18:16:46,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 18:16:46,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 18:16:46,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 185 transitions. [2024-06-21 18:16:46,258 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6045751633986928 [2024-06-21 18:16:46,258 INFO L175 Difference]: Start difference. First operand has 237 places, 371 transitions, 4651 flow. Second operand 6 states and 185 transitions. [2024-06-21 18:16:46,258 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 242 places, 408 transitions, 5594 flow [2024-06-21 18:16:47,799 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 239 places, 408 transitions, 5539 flow, removed 4 selfloop flow, removed 3 redundant places. [2024-06-21 18:16:47,803 INFO L231 Difference]: Finished difference. Result has 240 places, 373 transitions, 4712 flow [2024-06-21 18:16:47,804 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=4596, PETRI_DIFFERENCE_MINUEND_PLACES=234, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=371, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=336, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=4712, PETRI_PLACES=240, PETRI_TRANSITIONS=373} [2024-06-21 18:16:47,804 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 186 predicate places. [2024-06-21 18:16:47,804 INFO L495 AbstractCegarLoop]: Abstraction has has 240 places, 373 transitions, 4712 flow [2024-06-21 18:16:47,804 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.875) internal successors, (151), 8 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:16:47,804 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:16:47,804 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:16:47,804 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2024-06-21 18:16:47,804 INFO L420 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 18:16:47,805 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:16:47,805 INFO L85 PathProgramCache]: Analyzing trace with hash -738630665, now seen corresponding path program 6 times [2024-06-21 18:16:47,805 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:16:47,805 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1281709181] [2024-06-21 18:16:47,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:16:47,805 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:16:47,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:16:47,972 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:16:47,973 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:16:47,973 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1281709181] [2024-06-21 18:16:47,973 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1281709181] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:16:47,973 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:16:47,973 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 18:16:47,973 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1327027413] [2024-06-21 18:16:47,973 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:16:47,973 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 18:16:47,973 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:16:47,973 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 18:16:47,974 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-21 18:16:48,024 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 51 [2024-06-21 18:16:48,024 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 240 places, 373 transitions, 4712 flow. Second operand has 8 states, 8 states have (on average 18.875) internal successors, (151), 8 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:16:48,024 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:16:48,025 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 51 [2024-06-21 18:16:48,025 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:16:49,689 INFO L124 PetriNetUnfolderBase]: 8539/12498 cut-off events. [2024-06-21 18:16:49,689 INFO L125 PetriNetUnfolderBase]: For 665406/665428 co-relation queries the response was YES. [2024-06-21 18:16:49,795 INFO L83 FinitePrefix]: Finished finitePrefix Result has 89005 conditions, 12498 events. 8539/12498 cut-off events. For 665406/665428 co-relation queries the response was YES. Maximal size of possible extension queue 492. Compared 74066 event pairs, 2070 based on Foata normal form. 30/12524 useless extension candidates. Maximal degree in co-relation 88893. Up to 11067 conditions per place. [2024-06-21 18:16:49,854 INFO L140 encePairwiseOnDemand]: 42/51 looper letters, 356 selfloop transitions, 51 changer transitions 0/416 dead transitions. [2024-06-21 18:16:49,854 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 245 places, 416 transitions, 5693 flow [2024-06-21 18:16:49,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 18:16:49,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 18:16:49,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 191 transitions. [2024-06-21 18:16:49,855 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6241830065359477 [2024-06-21 18:16:49,855 INFO L175 Difference]: Start difference. First operand has 240 places, 373 transitions, 4712 flow. Second operand 6 states and 191 transitions. [2024-06-21 18:16:49,855 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 245 places, 416 transitions, 5693 flow [2024-06-21 18:16:51,310 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 241 places, 416 transitions, 5615 flow, removed 8 selfloop flow, removed 4 redundant places. [2024-06-21 18:16:51,314 INFO L231 Difference]: Finished difference. Result has 243 places, 375 transitions, 4806 flow [2024-06-21 18:16:51,314 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=4636, PETRI_DIFFERENCE_MINUEND_PLACES=236, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=373, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=323, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=4806, PETRI_PLACES=243, PETRI_TRANSITIONS=375} [2024-06-21 18:16:51,315 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 189 predicate places. [2024-06-21 18:16:51,315 INFO L495 AbstractCegarLoop]: Abstraction has has 243 places, 375 transitions, 4806 flow [2024-06-21 18:16:51,315 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.875) internal successors, (151), 8 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:16:51,315 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:16:51,315 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:16:51,315 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2024-06-21 18:16:51,316 INFO L420 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 18:16:51,316 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:16:51,316 INFO L85 PathProgramCache]: Analyzing trace with hash -727179761, now seen corresponding path program 1 times [2024-06-21 18:16:51,316 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:16:51,316 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [609774207] [2024-06-21 18:16:51,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:16:51,316 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:16:51,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:16:51,483 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:16:51,483 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:16:51,483 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [609774207] [2024-06-21 18:16:51,484 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [609774207] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:16:51,484 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:16:51,484 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 18:16:51,484 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [114277457] [2024-06-21 18:16:51,484 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:16:51,484 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 18:16:51,484 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:16:51,484 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 18:16:51,484 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-21 18:16:51,537 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 51 [2024-06-21 18:16:51,537 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 243 places, 375 transitions, 4806 flow. Second operand has 8 states, 8 states have (on average 18.875) internal successors, (151), 8 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:16:51,537 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:16:51,537 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 51 [2024-06-21 18:16:51,537 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:16:53,147 INFO L124 PetriNetUnfolderBase]: 8507/12459 cut-off events. [2024-06-21 18:16:53,147 INFO L125 PetriNetUnfolderBase]: For 680921/680935 co-relation queries the response was YES. [2024-06-21 18:16:53,253 INFO L83 FinitePrefix]: Finished finitePrefix Result has 89382 conditions, 12459 events. 8507/12459 cut-off events. For 680921/680935 co-relation queries the response was YES. Maximal size of possible extension queue 496. Compared 73799 event pairs, 2505 based on Foata normal form. 17/12472 useless extension candidates. Maximal degree in co-relation 89268. Up to 11216 conditions per place. [2024-06-21 18:16:53,311 INFO L140 encePairwiseOnDemand]: 42/51 looper letters, 363 selfloop transitions, 41 changer transitions 0/413 dead transitions. [2024-06-21 18:16:53,311 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 248 places, 413 transitions, 5775 flow [2024-06-21 18:16:53,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 18:16:53,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 18:16:53,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 182 transitions. [2024-06-21 18:16:53,312 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5947712418300654 [2024-06-21 18:16:53,312 INFO L175 Difference]: Start difference. First operand has 243 places, 375 transitions, 4806 flow. Second operand 6 states and 182 transitions. [2024-06-21 18:16:53,312 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 248 places, 413 transitions, 5775 flow [2024-06-21 18:16:54,868 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 243 places, 413 transitions, 5679 flow, removed 11 selfloop flow, removed 5 redundant places. [2024-06-21 18:16:54,873 INFO L231 Difference]: Finished difference. Result has 245 places, 380 transitions, 4863 flow [2024-06-21 18:16:54,874 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=4710, PETRI_DIFFERENCE_MINUEND_PLACES=238, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=375, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=335, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=4863, PETRI_PLACES=245, PETRI_TRANSITIONS=380} [2024-06-21 18:16:54,874 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 191 predicate places. [2024-06-21 18:16:54,874 INFO L495 AbstractCegarLoop]: Abstraction has has 245 places, 380 transitions, 4863 flow [2024-06-21 18:16:54,874 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.875) internal successors, (151), 8 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:16:54,874 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:16:54,874 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:16:54,875 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2024-06-21 18:16:54,875 INFO L420 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 18:16:54,875 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:16:54,875 INFO L85 PathProgramCache]: Analyzing trace with hash -900760962, now seen corresponding path program 1 times [2024-06-21 18:16:54,875 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:16:54,875 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [300216338] [2024-06-21 18:16:54,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:16:54,875 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:16:54,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:16:55,022 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:16:55,022 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:16:55,022 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [300216338] [2024-06-21 18:16:55,023 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [300216338] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:16:55,023 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:16:55,023 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 18:16:55,023 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [888819495] [2024-06-21 18:16:55,023 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:16:55,023 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 18:16:55,023 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:16:55,024 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 18:16:55,024 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-21 18:16:55,062 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 51 [2024-06-21 18:16:55,063 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 245 places, 380 transitions, 4863 flow. Second operand has 6 states, 6 states have (on average 21.666666666666668) internal successors, (130), 6 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:16:55,063 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:16:55,063 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 51 [2024-06-21 18:16:55,063 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:16:56,585 INFO L124 PetriNetUnfolderBase]: 7752/11548 cut-off events. [2024-06-21 18:16:56,585 INFO L125 PetriNetUnfolderBase]: For 694253/694410 co-relation queries the response was YES. [2024-06-21 18:16:56,689 INFO L83 FinitePrefix]: Finished finitePrefix Result has 86279 conditions, 11548 events. 7752/11548 cut-off events. For 694253/694410 co-relation queries the response was YES. Maximal size of possible extension queue 487. Compared 70676 event pairs, 2364 based on Foata normal form. 65/11387 useless extension candidates. Maximal degree in co-relation 86165. Up to 10124 conditions per place. [2024-06-21 18:16:56,746 INFO L140 encePairwiseOnDemand]: 43/51 looper letters, 294 selfloop transitions, 41 changer transitions 0/395 dead transitions. [2024-06-21 18:16:56,747 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 248 places, 395 transitions, 5619 flow [2024-06-21 18:16:56,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-21 18:16:56,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-21 18:16:56,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 127 transitions. [2024-06-21 18:16:56,747 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6225490196078431 [2024-06-21 18:16:56,747 INFO L175 Difference]: Start difference. First operand has 245 places, 380 transitions, 4863 flow. Second operand 4 states and 127 transitions. [2024-06-21 18:16:56,747 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 248 places, 395 transitions, 5619 flow [2024-06-21 18:16:58,262 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 246 places, 395 transitions, 5569 flow, removed 8 selfloop flow, removed 2 redundant places. [2024-06-21 18:16:58,267 INFO L231 Difference]: Finished difference. Result has 247 places, 384 transitions, 4979 flow [2024-06-21 18:16:58,267 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=4813, PETRI_DIFFERENCE_MINUEND_PLACES=243, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=380, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=339, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=4979, PETRI_PLACES=247, PETRI_TRANSITIONS=384} [2024-06-21 18:16:58,268 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 193 predicate places. [2024-06-21 18:16:58,268 INFO L495 AbstractCegarLoop]: Abstraction has has 247 places, 384 transitions, 4979 flow [2024-06-21 18:16:58,268 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 21.666666666666668) internal successors, (130), 6 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:16:58,268 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:16:58,268 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:16:58,268 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2024-06-21 18:16:58,268 INFO L420 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 18:16:58,268 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:16:58,268 INFO L85 PathProgramCache]: Analyzing trace with hash 738876346, now seen corresponding path program 2 times [2024-06-21 18:16:58,268 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:16:58,268 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1075313630] [2024-06-21 18:16:58,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:16:58,269 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:16:58,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:16:58,453 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:16:58,453 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:16:58,453 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1075313630] [2024-06-21 18:16:58,453 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1075313630] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:16:58,453 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:16:58,453 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 18:16:58,454 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [471000040] [2024-06-21 18:16:58,454 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:16:58,454 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 18:16:58,454 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:16:58,454 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 18:16:58,454 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-21 18:16:58,503 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 51 [2024-06-21 18:16:58,504 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 247 places, 384 transitions, 4979 flow. Second operand has 7 states, 7 states have (on average 20.428571428571427) internal successors, (143), 7 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:16:58,504 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:16:58,504 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 51 [2024-06-21 18:16:58,504 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:17:00,096 INFO L124 PetriNetUnfolderBase]: 7736/11488 cut-off events. [2024-06-21 18:17:00,097 INFO L125 PetriNetUnfolderBase]: For 717198/717355 co-relation queries the response was YES. [2024-06-21 18:17:00,206 INFO L83 FinitePrefix]: Finished finitePrefix Result has 87909 conditions, 11488 events. 7736/11488 cut-off events. For 717198/717355 co-relation queries the response was YES. Maximal size of possible extension queue 485. Compared 70024 event pairs, 2364 based on Foata normal form. 65/11327 useless extension candidates. Maximal degree in co-relation 87792. Up to 10096 conditions per place. [2024-06-21 18:17:00,267 INFO L140 encePairwiseOnDemand]: 43/51 looper letters, 296 selfloop transitions, 45 changer transitions 0/400 dead transitions. [2024-06-21 18:17:00,267 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 251 places, 400 transitions, 5757 flow [2024-06-21 18:17:00,267 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-21 18:17:00,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-21 18:17:00,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 147 transitions. [2024-06-21 18:17:00,268 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5764705882352941 [2024-06-21 18:17:00,268 INFO L175 Difference]: Start difference. First operand has 247 places, 384 transitions, 4979 flow. Second operand 5 states and 147 transitions. [2024-06-21 18:17:00,268 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 251 places, 400 transitions, 5757 flow [2024-06-21 18:17:01,632 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 249 places, 400 transitions, 5637 flow, removed 27 selfloop flow, removed 2 redundant places. [2024-06-21 18:17:01,636 INFO L231 Difference]: Finished difference. Result has 250 places, 388 transitions, 5030 flow [2024-06-21 18:17:01,637 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=4865, PETRI_DIFFERENCE_MINUEND_PLACES=245, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=384, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=339, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=5030, PETRI_PLACES=250, PETRI_TRANSITIONS=388} [2024-06-21 18:17:01,637 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 196 predicate places. [2024-06-21 18:17:01,637 INFO L495 AbstractCegarLoop]: Abstraction has has 250 places, 388 transitions, 5030 flow [2024-06-21 18:17:01,637 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 20.428571428571427) internal successors, (143), 7 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:17:01,637 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:17:01,637 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:17:01,637 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2024-06-21 18:17:01,637 INFO L420 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 18:17:01,638 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:17:01,638 INFO L85 PathProgramCache]: Analyzing trace with hash 1633582683, now seen corresponding path program 1 times [2024-06-21 18:17:01,638 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:17:01,638 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [15574618] [2024-06-21 18:17:01,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:17:01,638 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:17:01,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:17:01,807 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:17:01,808 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:17:01,808 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [15574618] [2024-06-21 18:17:01,808 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [15574618] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:17:01,808 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:17:01,808 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 18:17:01,808 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [394638118] [2024-06-21 18:17:01,808 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:17:01,808 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 18:17:01,808 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:17:01,808 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 18:17:01,809 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-21 18:17:01,865 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 51 [2024-06-21 18:17:01,866 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 250 places, 388 transitions, 5030 flow. Second operand has 8 states, 8 states have (on average 19.875) internal successors, (159), 8 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:17:01,866 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:17:01,866 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 51 [2024-06-21 18:17:01,866 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:17:03,602 INFO L124 PetriNetUnfolderBase]: 8299/12392 cut-off events. [2024-06-21 18:17:03,603 INFO L125 PetriNetUnfolderBase]: For 716081/716087 co-relation queries the response was YES. [2024-06-21 18:17:03,725 INFO L83 FinitePrefix]: Finished finitePrefix Result has 92899 conditions, 12392 events. 8299/12392 cut-off events. For 716081/716087 co-relation queries the response was YES. Maximal size of possible extension queue 508. Compared 75972 event pairs, 2387 based on Foata normal form. 30/12417 useless extension candidates. Maximal degree in co-relation 92782. Up to 10750 conditions per place. [2024-06-21 18:17:03,789 INFO L140 encePairwiseOnDemand]: 41/51 looper letters, 383 selfloop transitions, 49 changer transitions 0/444 dead transitions. [2024-06-21 18:17:03,789 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 256 places, 444 transitions, 6355 flow [2024-06-21 18:17:03,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 18:17:03,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 18:17:03,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 221 transitions. [2024-06-21 18:17:03,790 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6190476190476191 [2024-06-21 18:17:03,790 INFO L175 Difference]: Start difference. First operand has 250 places, 388 transitions, 5030 flow. Second operand 7 states and 221 transitions. [2024-06-21 18:17:03,790 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 256 places, 444 transitions, 6355 flow [2024-06-21 18:17:05,142 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 253 places, 444 transitions, 6222 flow, removed 24 selfloop flow, removed 3 redundant places. [2024-06-21 18:17:05,147 INFO L231 Difference]: Finished difference. Result has 256 places, 399 transitions, 5174 flow [2024-06-21 18:17:05,148 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=4897, PETRI_DIFFERENCE_MINUEND_PLACES=247, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=388, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=342, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5174, PETRI_PLACES=256, PETRI_TRANSITIONS=399} [2024-06-21 18:17:05,148 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 202 predicate places. [2024-06-21 18:17:05,148 INFO L495 AbstractCegarLoop]: Abstraction has has 256 places, 399 transitions, 5174 flow [2024-06-21 18:17:05,148 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 19.875) internal successors, (159), 8 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:17:05,148 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:17:05,149 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:17:05,149 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2024-06-21 18:17:05,149 INFO L420 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 18:17:05,149 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:17:05,149 INFO L85 PathProgramCache]: Analyzing trace with hash -930417253, now seen corresponding path program 2 times [2024-06-21 18:17:05,149 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:17:05,149 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [731550949] [2024-06-21 18:17:05,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:17:05,150 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:17:05,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:17:05,340 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:17:05,340 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:17:05,340 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [731550949] [2024-06-21 18:17:05,341 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [731550949] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:17:05,341 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:17:05,341 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 18:17:05,341 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1366906312] [2024-06-21 18:17:05,341 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:17:05,341 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 18:17:05,341 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:17:05,342 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 18:17:05,342 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-21 18:17:05,405 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 51 [2024-06-21 18:17:05,405 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 256 places, 399 transitions, 5174 flow. Second operand has 8 states, 8 states have (on average 19.875) internal successors, (159), 8 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:17:05,405 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:17:05,405 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 51 [2024-06-21 18:17:05,405 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:17:07,286 INFO L124 PetriNetUnfolderBase]: 8639/12904 cut-off events. [2024-06-21 18:17:07,287 INFO L125 PetriNetUnfolderBase]: For 788286/788292 co-relation queries the response was YES. [2024-06-21 18:17:07,409 INFO L83 FinitePrefix]: Finished finitePrefix Result has 99134 conditions, 12904 events. 8639/12904 cut-off events. For 788286/788292 co-relation queries the response was YES. Maximal size of possible extension queue 547. Compared 79593 event pairs, 2635 based on Foata normal form. 30/12929 useless extension candidates. Maximal degree in co-relation 99014. Up to 11484 conditions per place. [2024-06-21 18:17:07,475 INFO L140 encePairwiseOnDemand]: 41/51 looper letters, 386 selfloop transitions, 45 changer transitions 0/443 dead transitions. [2024-06-21 18:17:07,476 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 262 places, 443 transitions, 6433 flow [2024-06-21 18:17:07,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 18:17:07,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 18:17:07,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 218 transitions. [2024-06-21 18:17:07,476 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6106442577030813 [2024-06-21 18:17:07,477 INFO L175 Difference]: Start difference. First operand has 256 places, 399 transitions, 5174 flow. Second operand 7 states and 218 transitions. [2024-06-21 18:17:07,478 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 262 places, 443 transitions, 6433 flow [2024-06-21 18:17:09,253 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 260 places, 443 transitions, 6346 flow, removed 22 selfloop flow, removed 2 redundant places. [2024-06-21 18:17:09,258 INFO L231 Difference]: Finished difference. Result has 262 places, 404 transitions, 5286 flow [2024-06-21 18:17:09,258 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=5091, PETRI_DIFFERENCE_MINUEND_PLACES=254, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=399, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=356, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5286, PETRI_PLACES=262, PETRI_TRANSITIONS=404} [2024-06-21 18:17:09,259 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 208 predicate places. [2024-06-21 18:17:09,259 INFO L495 AbstractCegarLoop]: Abstraction has has 262 places, 404 transitions, 5286 flow [2024-06-21 18:17:09,259 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 19.875) internal successors, (159), 8 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:17:09,259 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:17:09,259 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:17:09,259 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2024-06-21 18:17:09,260 INFO L420 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 18:17:09,260 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:17:09,260 INFO L85 PathProgramCache]: Analyzing trace with hash -930269383, now seen corresponding path program 3 times [2024-06-21 18:17:09,260 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:17:09,260 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1231859743] [2024-06-21 18:17:09,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:17:09,260 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:17:09,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:17:09,414 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:17:09,414 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:17:09,415 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1231859743] [2024-06-21 18:17:09,415 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1231859743] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:17:09,415 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:17:09,415 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 18:17:09,415 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1247504948] [2024-06-21 18:17:09,415 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:17:09,415 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 18:17:09,415 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:17:09,416 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 18:17:09,416 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-21 18:17:09,465 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 51 [2024-06-21 18:17:09,466 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 262 places, 404 transitions, 5286 flow. Second operand has 8 states, 8 states have (on average 19.875) internal successors, (159), 8 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:17:09,466 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:17:09,466 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 51 [2024-06-21 18:17:09,466 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:17:11,322 INFO L124 PetriNetUnfolderBase]: 8567/12800 cut-off events. [2024-06-21 18:17:11,322 INFO L125 PetriNetUnfolderBase]: For 791774/791780 co-relation queries the response was YES. [2024-06-21 18:17:11,443 INFO L83 FinitePrefix]: Finished finitePrefix Result has 97843 conditions, 12800 events. 8567/12800 cut-off events. For 791774/791780 co-relation queries the response was YES. Maximal size of possible extension queue 541. Compared 78825 event pairs, 2637 based on Foata normal form. 38/12833 useless extension candidates. Maximal degree in co-relation 97720. Up to 11626 conditions per place. [2024-06-21 18:17:11,506 INFO L140 encePairwiseOnDemand]: 41/51 looper letters, 385 selfloop transitions, 42 changer transitions 0/439 dead transitions. [2024-06-21 18:17:11,506 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 268 places, 439 transitions, 6264 flow [2024-06-21 18:17:11,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 18:17:11,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 18:17:11,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 213 transitions. [2024-06-21 18:17:11,507 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5966386554621849 [2024-06-21 18:17:11,507 INFO L175 Difference]: Start difference. First operand has 262 places, 404 transitions, 5286 flow. Second operand 7 states and 213 transitions. [2024-06-21 18:17:11,507 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 268 places, 439 transitions, 6264 flow [2024-06-21 18:17:12,691 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 265 places, 439 transitions, 6175 flow, removed 22 selfloop flow, removed 3 redundant places. [2024-06-21 18:17:12,696 INFO L231 Difference]: Finished difference. Result has 266 places, 405 transitions, 5309 flow [2024-06-21 18:17:12,696 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=5201, PETRI_DIFFERENCE_MINUEND_PLACES=259, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=404, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=362, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5309, PETRI_PLACES=266, PETRI_TRANSITIONS=405} [2024-06-21 18:17:12,696 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 212 predicate places. [2024-06-21 18:17:12,696 INFO L495 AbstractCegarLoop]: Abstraction has has 266 places, 405 transitions, 5309 flow [2024-06-21 18:17:12,697 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 19.875) internal successors, (159), 8 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:17:12,697 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:17:12,697 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:17:12,697 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64 [2024-06-21 18:17:12,697 INFO L420 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 18:17:12,697 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:17:12,697 INFO L85 PathProgramCache]: Analyzing trace with hash -58931655, now seen corresponding path program 4 times [2024-06-21 18:17:12,698 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:17:12,698 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1377438564] [2024-06-21 18:17:12,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:17:12,698 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:17:12,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:17:12,879 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:17:12,879 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:17:12,879 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1377438564] [2024-06-21 18:17:12,879 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1377438564] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:17:12,879 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:17:12,879 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 18:17:12,879 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [572577674] [2024-06-21 18:17:12,879 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:17:12,879 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 18:17:12,880 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:17:12,880 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 18:17:12,880 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-21 18:17:12,927 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 51 [2024-06-21 18:17:12,928 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 266 places, 405 transitions, 5309 flow. Second operand has 8 states, 8 states have (on average 19.875) internal successors, (159), 8 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:17:12,928 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:17:12,928 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 51 [2024-06-21 18:17:12,928 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:17:15,070 INFO L124 PetriNetUnfolderBase]: 8723/13056 cut-off events. [2024-06-21 18:17:15,070 INFO L125 PetriNetUnfolderBase]: For 820695/820701 co-relation queries the response was YES. [2024-06-21 18:17:15,175 INFO L83 FinitePrefix]: Finished finitePrefix Result has 99721 conditions, 13056 events. 8723/13056 cut-off events. For 820695/820701 co-relation queries the response was YES. Maximal size of possible extension queue 564. Compared 80980 event pairs, 2671 based on Foata normal form. 38/13089 useless extension candidates. Maximal degree in co-relation 99596. Up to 11898 conditions per place. [2024-06-21 18:17:15,235 INFO L140 encePairwiseOnDemand]: 41/51 looper letters, 390 selfloop transitions, 35 changer transitions 0/437 dead transitions. [2024-06-21 18:17:15,235 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 271 places, 437 transitions, 6299 flow [2024-06-21 18:17:15,236 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 18:17:15,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 18:17:15,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 187 transitions. [2024-06-21 18:17:15,236 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6111111111111112 [2024-06-21 18:17:15,236 INFO L175 Difference]: Start difference. First operand has 266 places, 405 transitions, 5309 flow. Second operand 6 states and 187 transitions. [2024-06-21 18:17:15,236 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 271 places, 437 transitions, 6299 flow [2024-06-21 18:17:16,759 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 266 places, 437 transitions, 6215 flow, removed 2 selfloop flow, removed 5 redundant places. [2024-06-21 18:17:16,764 INFO L231 Difference]: Finished difference. Result has 267 places, 407 transitions, 5351 flow [2024-06-21 18:17:16,764 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=5225, PETRI_DIFFERENCE_MINUEND_PLACES=261, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=405, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=370, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=5351, PETRI_PLACES=267, PETRI_TRANSITIONS=407} [2024-06-21 18:17:16,764 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 213 predicate places. [2024-06-21 18:17:16,764 INFO L495 AbstractCegarLoop]: Abstraction has has 267 places, 407 transitions, 5351 flow [2024-06-21 18:17:16,764 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 19.875) internal successors, (159), 8 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:17:16,764 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:17:16,765 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:17:16,765 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65 [2024-06-21 18:17:16,765 INFO L420 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 18:17:16,765 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:17:16,765 INFO L85 PathProgramCache]: Analyzing trace with hash -59079525, now seen corresponding path program 5 times [2024-06-21 18:17:16,765 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:17:16,766 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [96774947] [2024-06-21 18:17:16,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:17:16,766 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:17:16,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:17:16,941 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:17:16,941 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:17:16,941 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [96774947] [2024-06-21 18:17:16,941 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [96774947] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:17:16,941 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:17:16,941 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 18:17:16,941 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [178808012] [2024-06-21 18:17:16,941 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:17:16,942 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 18:17:16,942 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:17:16,942 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 18:17:16,942 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-21 18:17:17,028 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 51 [2024-06-21 18:17:17,028 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 267 places, 407 transitions, 5351 flow. Second operand has 8 states, 8 states have (on average 19.875) internal successors, (159), 8 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:17:17,028 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:17:17,028 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 51 [2024-06-21 18:17:17,028 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:17:19,024 INFO L124 PetriNetUnfolderBase]: 8835/13228 cut-off events. [2024-06-21 18:17:19,024 INFO L125 PetriNetUnfolderBase]: For 844852/844858 co-relation queries the response was YES. [2024-06-21 18:17:19,165 INFO L83 FinitePrefix]: Finished finitePrefix Result has 101518 conditions, 13228 events. 8835/13228 cut-off events. For 844852/844858 co-relation queries the response was YES. Maximal size of possible extension queue 577. Compared 82199 event pairs, 2471 based on Foata normal form. 30/13253 useless extension candidates. Maximal degree in co-relation 101392. Up to 11580 conditions per place. [2024-06-21 18:17:19,232 INFO L140 encePairwiseOnDemand]: 41/51 looper letters, 394 selfloop transitions, 42 changer transitions 0/448 dead transitions. [2024-06-21 18:17:19,232 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 272 places, 448 transitions, 6594 flow [2024-06-21 18:17:19,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 18:17:19,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 18:17:19,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 195 transitions. [2024-06-21 18:17:19,233 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6372549019607843 [2024-06-21 18:17:19,233 INFO L175 Difference]: Start difference. First operand has 267 places, 407 transitions, 5351 flow. Second operand 6 states and 195 transitions. [2024-06-21 18:17:19,233 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 272 places, 448 transitions, 6594 flow [2024-06-21 18:17:21,179 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 268 places, 448 transitions, 6508 flow, removed 10 selfloop flow, removed 4 redundant places. [2024-06-21 18:17:21,184 INFO L231 Difference]: Finished difference. Result has 270 places, 410 transitions, 5425 flow [2024-06-21 18:17:21,184 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=5265, PETRI_DIFFERENCE_MINUEND_PLACES=263, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=407, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=367, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=5425, PETRI_PLACES=270, PETRI_TRANSITIONS=410} [2024-06-21 18:17:21,184 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 216 predicate places. [2024-06-21 18:17:21,184 INFO L495 AbstractCegarLoop]: Abstraction has has 270 places, 410 transitions, 5425 flow [2024-06-21 18:17:21,184 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 19.875) internal successors, (159), 8 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:17:21,185 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:17:21,185 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:17:21,185 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66 [2024-06-21 18:17:21,185 INFO L420 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 18:17:21,185 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:17:21,185 INFO L85 PathProgramCache]: Analyzing trace with hash -53569275, now seen corresponding path program 6 times [2024-06-21 18:17:21,185 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:17:21,185 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1433011047] [2024-06-21 18:17:21,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:17:21,185 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:17:21,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:17:21,346 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:17:21,347 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:17:21,347 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1433011047] [2024-06-21 18:17:21,347 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1433011047] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:17:21,347 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:17:21,347 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 18:17:21,347 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2051340169] [2024-06-21 18:17:21,347 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:17:21,348 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 18:17:21,348 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:17:21,348 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 18:17:21,349 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-21 18:17:21,412 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 51 [2024-06-21 18:17:21,412 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 270 places, 410 transitions, 5425 flow. Second operand has 8 states, 8 states have (on average 19.875) internal successors, (159), 8 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:17:21,412 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:17:21,412 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 51 [2024-06-21 18:17:21,412 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:17:24,253 INFO L124 PetriNetUnfolderBase]: 8765/13128 cut-off events. [2024-06-21 18:17:24,254 INFO L125 PetriNetUnfolderBase]: For 843759/843767 co-relation queries the response was YES. [2024-06-21 18:17:24,363 INFO L83 FinitePrefix]: Finished finitePrefix Result has 100000 conditions, 13128 events. 8765/13128 cut-off events. For 843759/843767 co-relation queries the response was YES. Maximal size of possible extension queue 572. Compared 81611 event pairs, 2643 based on Foata normal form. 40/13165 useless extension candidates. Maximal degree in co-relation 99872. Up to 11966 conditions per place. [2024-06-21 18:17:24,424 INFO L140 encePairwiseOnDemand]: 41/51 looper letters, 398 selfloop transitions, 39 changer transitions 0/449 dead transitions. [2024-06-21 18:17:24,424 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 277 places, 449 transitions, 6437 flow [2024-06-21 18:17:24,425 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 18:17:24,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 18:17:24,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 238 transitions. [2024-06-21 18:17:24,425 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5833333333333334 [2024-06-21 18:17:24,425 INFO L175 Difference]: Start difference. First operand has 270 places, 410 transitions, 5425 flow. Second operand 8 states and 238 transitions. [2024-06-21 18:17:24,425 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 277 places, 449 transitions, 6437 flow [2024-06-21 18:17:25,852 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 272 places, 449 transitions, 6256 flow, removed 26 selfloop flow, removed 5 redundant places. [2024-06-21 18:17:25,857 INFO L231 Difference]: Finished difference. Result has 273 places, 411 transitions, 5354 flow [2024-06-21 18:17:25,857 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=5252, PETRI_DIFFERENCE_MINUEND_PLACES=265, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=410, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=371, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5354, PETRI_PLACES=273, PETRI_TRANSITIONS=411} [2024-06-21 18:17:25,857 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 219 predicate places. [2024-06-21 18:17:25,857 INFO L495 AbstractCegarLoop]: Abstraction has has 273 places, 411 transitions, 5354 flow [2024-06-21 18:17:25,858 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 19.875) internal successors, (159), 8 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:17:25,858 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:17:25,858 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:17:25,858 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67 [2024-06-21 18:17:25,858 INFO L420 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 18:17:25,858 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:17:25,858 INFO L85 PathProgramCache]: Analyzing trace with hash -53354073, now seen corresponding path program 1 times [2024-06-21 18:17:25,858 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:17:25,858 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1610523095] [2024-06-21 18:17:25,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:17:25,858 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:17:25,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:17:26,099 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:17:26,099 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:17:26,099 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1610523095] [2024-06-21 18:17:26,099 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1610523095] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:17:26,099 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:17:26,099 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 18:17:26,099 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1210048012] [2024-06-21 18:17:26,099 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:17:26,099 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 18:17:26,100 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:17:26,100 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 18:17:26,100 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-21 18:17:26,154 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 51 [2024-06-21 18:17:26,154 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 273 places, 411 transitions, 5354 flow. Second operand has 8 states, 8 states have (on average 19.875) internal successors, (159), 8 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:17:26,154 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:17:26,154 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 51 [2024-06-21 18:17:26,154 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:17:28,515 INFO L124 PetriNetUnfolderBase]: 8713/13044 cut-off events. [2024-06-21 18:17:28,515 INFO L125 PetriNetUnfolderBase]: For 824333/824341 co-relation queries the response was YES. [2024-06-21 18:17:28,629 INFO L83 FinitePrefix]: Finished finitePrefix Result has 97728 conditions, 13044 events. 8713/13044 cut-off events. For 824333/824341 co-relation queries the response was YES. Maximal size of possible extension queue 567. Compared 80674 event pairs, 2522 based on Foata normal form. 32/13073 useless extension candidates. Maximal degree in co-relation 97600. Up to 11476 conditions per place. [2024-06-21 18:17:28,690 INFO L140 encePairwiseOnDemand]: 41/51 looper letters, 394 selfloop transitions, 48 changer transitions 0/454 dead transitions. [2024-06-21 18:17:28,690 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 280 places, 454 transitions, 6410 flow [2024-06-21 18:17:28,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 18:17:28,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 18:17:28,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 241 transitions. [2024-06-21 18:17:28,691 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5906862745098039 [2024-06-21 18:17:28,691 INFO L175 Difference]: Start difference. First operand has 273 places, 411 transitions, 5354 flow. Second operand 8 states and 241 transitions. [2024-06-21 18:17:28,691 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 280 places, 454 transitions, 6410 flow [2024-06-21 18:17:30,503 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 274 places, 454 transitions, 6326 flow, removed 5 selfloop flow, removed 6 redundant places. [2024-06-21 18:17:30,508 INFO L231 Difference]: Finished difference. Result has 275 places, 413 transitions, 5417 flow [2024-06-21 18:17:30,508 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=5270, PETRI_DIFFERENCE_MINUEND_PLACES=267, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=411, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=363, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5417, PETRI_PLACES=275, PETRI_TRANSITIONS=413} [2024-06-21 18:17:30,509 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 221 predicate places. [2024-06-21 18:17:30,509 INFO L495 AbstractCegarLoop]: Abstraction has has 275 places, 413 transitions, 5417 flow [2024-06-21 18:17:30,509 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 19.875) internal successors, (159), 8 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:17:30,509 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:17:30,509 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:17:30,509 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68 [2024-06-21 18:17:30,509 INFO L420 AbstractCegarLoop]: === Iteration 70 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 18:17:30,509 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:17:30,509 INFO L85 PathProgramCache]: Analyzing trace with hash -1085796766, now seen corresponding path program 1 times [2024-06-21 18:17:30,509 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:17:30,509 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1675621173] [2024-06-21 18:17:30,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:17:30,510 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:17:30,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:17:30,681 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:17:30,681 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:17:30,681 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1675621173] [2024-06-21 18:17:30,681 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1675621173] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:17:30,681 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:17:30,681 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 18:17:30,681 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1140652027] [2024-06-21 18:17:30,681 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:17:30,682 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 18:17:30,682 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:17:30,682 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 18:17:30,682 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-21 18:17:30,734 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 51 [2024-06-21 18:17:30,735 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 275 places, 413 transitions, 5417 flow. Second operand has 7 states, 7 states have (on average 20.428571428571427) internal successors, (143), 7 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:17:30,735 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:17:30,735 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 51 [2024-06-21 18:17:30,735 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:17:33,044 INFO L124 PetriNetUnfolderBase]: 8413/12770 cut-off events. [2024-06-21 18:17:33,044 INFO L125 PetriNetUnfolderBase]: For 828464/828471 co-relation queries the response was YES. [2024-06-21 18:17:33,157 INFO L83 FinitePrefix]: Finished finitePrefix Result has 96430 conditions, 12770 events. 8413/12770 cut-off events. For 828464/828471 co-relation queries the response was YES. Maximal size of possible extension queue 566. Compared 80991 event pairs, 2591 based on Foata normal form. 9/12743 useless extension candidates. Maximal degree in co-relation 96300. Up to 11470 conditions per place. [2024-06-21 18:17:33,331 INFO L140 encePairwiseOnDemand]: 43/51 looper letters, 351 selfloop transitions, 48 changer transitions 0/437 dead transitions. [2024-06-21 18:17:33,331 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 279 places, 437 transitions, 6525 flow [2024-06-21 18:17:33,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-21 18:17:33,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-21 18:17:33,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 151 transitions. [2024-06-21 18:17:33,332 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.592156862745098 [2024-06-21 18:17:33,332 INFO L175 Difference]: Start difference. First operand has 275 places, 413 transitions, 5417 flow. Second operand 5 states and 151 transitions. [2024-06-21 18:17:33,332 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 279 places, 437 transitions, 6525 flow [2024-06-21 18:17:34,897 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 272 places, 437 transitions, 6389 flow, removed 14 selfloop flow, removed 7 redundant places. [2024-06-21 18:17:34,902 INFO L231 Difference]: Finished difference. Result has 273 places, 421 transitions, 5557 flow [2024-06-21 18:17:34,903 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=5281, PETRI_DIFFERENCE_MINUEND_PLACES=268, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=413, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=369, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=5557, PETRI_PLACES=273, PETRI_TRANSITIONS=421} [2024-06-21 18:17:34,903 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 219 predicate places. [2024-06-21 18:17:34,903 INFO L495 AbstractCegarLoop]: Abstraction has has 273 places, 421 transitions, 5557 flow [2024-06-21 18:17:34,903 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 20.428571428571427) internal successors, (143), 7 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:17:34,903 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:17:34,903 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:17:34,903 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69 [2024-06-21 18:17:34,903 INFO L420 AbstractCegarLoop]: === Iteration 71 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 18:17:34,904 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:17:34,904 INFO L85 PathProgramCache]: Analyzing trace with hash -1062583966, now seen corresponding path program 2 times [2024-06-21 18:17:34,904 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:17:34,904 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [735186573] [2024-06-21 18:17:34,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:17:34,904 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:17:34,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:17:35,138 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:17:35,139 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:17:35,139 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [735186573] [2024-06-21 18:17:35,139 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [735186573] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:17:35,139 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:17:35,139 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 18:17:35,140 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [822795404] [2024-06-21 18:17:35,140 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:17:35,140 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 18:17:35,140 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:17:35,140 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 18:17:35,141 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-21 18:17:35,188 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 51 [2024-06-21 18:17:35,188 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 273 places, 421 transitions, 5557 flow. Second operand has 7 states, 7 states have (on average 20.428571428571427) internal successors, (143), 7 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:17:35,188 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:17:35,188 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 51 [2024-06-21 18:17:35,189 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:17:37,502 INFO L124 PetriNetUnfolderBase]: 8399/12752 cut-off events. [2024-06-21 18:17:37,502 INFO L125 PetriNetUnfolderBase]: For 852951/852958 co-relation queries the response was YES. [2024-06-21 18:17:37,605 INFO L83 FinitePrefix]: Finished finitePrefix Result has 97258 conditions, 12752 events. 8399/12752 cut-off events. For 852951/852958 co-relation queries the response was YES. Maximal size of possible extension queue 565. Compared 80970 event pairs, 2591 based on Foata normal form. 9/12725 useless extension candidates. Maximal degree in co-relation 97128. Up to 11470 conditions per place. [2024-06-21 18:17:37,666 INFO L140 encePairwiseOnDemand]: 43/51 looper letters, 353 selfloop transitions, 44 changer transitions 0/435 dead transitions. [2024-06-21 18:17:37,666 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 276 places, 435 transitions, 6387 flow [2024-06-21 18:17:37,666 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-21 18:17:37,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-21 18:17:37,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 127 transitions. [2024-06-21 18:17:37,667 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6225490196078431 [2024-06-21 18:17:37,667 INFO L175 Difference]: Start difference. First operand has 273 places, 421 transitions, 5557 flow. Second operand 4 states and 127 transitions. [2024-06-21 18:17:37,667 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 276 places, 435 transitions, 6387 flow [2024-06-21 18:17:39,448 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 275 places, 435 transitions, 6230 flow, removed 62 selfloop flow, removed 1 redundant places. [2024-06-21 18:17:39,453 INFO L231 Difference]: Finished difference. Result has 276 places, 421 transitions, 5509 flow [2024-06-21 18:17:39,453 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=5400, PETRI_DIFFERENCE_MINUEND_PLACES=272, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=421, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=377, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=5509, PETRI_PLACES=276, PETRI_TRANSITIONS=421} [2024-06-21 18:17:39,453 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 222 predicate places. [2024-06-21 18:17:39,453 INFO L495 AbstractCegarLoop]: Abstraction has has 276 places, 421 transitions, 5509 flow [2024-06-21 18:17:39,453 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 20.428571428571427) internal successors, (143), 7 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:17:39,453 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:17:39,454 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:17:39,454 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70 [2024-06-21 18:17:39,454 INFO L420 AbstractCegarLoop]: === Iteration 72 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 18:17:39,454 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:17:39,454 INFO L85 PathProgramCache]: Analyzing trace with hash 738897178, now seen corresponding path program 1 times [2024-06-21 18:17:39,454 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:17:39,454 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1169868532] [2024-06-21 18:17:39,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:17:39,455 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:17:39,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:17:39,610 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:17:39,610 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:17:39,610 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1169868532] [2024-06-21 18:17:39,610 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1169868532] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:17:39,610 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:17:39,611 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 18:17:39,611 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [12384442] [2024-06-21 18:17:39,611 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:17:39,611 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 18:17:39,611 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:17:39,611 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 18:17:39,611 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-21 18:17:39,670 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 51 [2024-06-21 18:17:39,671 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 276 places, 421 transitions, 5509 flow. Second operand has 6 states, 6 states have (on average 21.666666666666668) internal successors, (130), 6 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:17:39,671 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:17:39,671 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 51 [2024-06-21 18:17:39,671 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:17:42,031 INFO L124 PetriNetUnfolderBase]: 8575/12759 cut-off events. [2024-06-21 18:17:42,032 INFO L125 PetriNetUnfolderBase]: For 948613/948752 co-relation queries the response was YES. [2024-06-21 18:17:42,132 INFO L83 FinitePrefix]: Finished finitePrefix Result has 99157 conditions, 12759 events. 8575/12759 cut-off events. For 948613/948752 co-relation queries the response was YES. Maximal size of possible extension queue 596. Compared 79270 event pairs, 2443 based on Foata normal form. 46/12572 useless extension candidates. Maximal degree in co-relation 99026. Up to 11396 conditions per place. [2024-06-21 18:17:42,193 INFO L140 encePairwiseOnDemand]: 44/51 looper letters, 357 selfloop transitions, 21 changer transitions 0/439 dead transitions. [2024-06-21 18:17:42,193 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 280 places, 439 transitions, 6373 flow [2024-06-21 18:17:42,194 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-21 18:17:42,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-21 18:17:42,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 149 transitions. [2024-06-21 18:17:42,194 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5843137254901961 [2024-06-21 18:17:42,194 INFO L175 Difference]: Start difference. First operand has 276 places, 421 transitions, 5509 flow. Second operand 5 states and 149 transitions. [2024-06-21 18:17:42,194 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 280 places, 439 transitions, 6373 flow [2024-06-21 18:17:43,763 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 277 places, 439 transitions, 6285 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-06-21 18:17:43,768 INFO L231 Difference]: Finished difference. Result has 278 places, 424 transitions, 5521 flow [2024-06-21 18:17:43,768 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=5421, PETRI_DIFFERENCE_MINUEND_PLACES=273, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=421, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=400, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=5521, PETRI_PLACES=278, PETRI_TRANSITIONS=424} [2024-06-21 18:17:43,769 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 224 predicate places. [2024-06-21 18:17:43,769 INFO L495 AbstractCegarLoop]: Abstraction has has 278 places, 424 transitions, 5521 flow [2024-06-21 18:17:43,769 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 21.666666666666668) internal successors, (130), 6 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:17:43,769 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:17:43,769 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:17:43,769 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71 [2024-06-21 18:17:43,769 INFO L420 AbstractCegarLoop]: === Iteration 73 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 18:17:43,769 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:17:43,769 INFO L85 PathProgramCache]: Analyzing trace with hash -641831537, now seen corresponding path program 1 times [2024-06-21 18:17:43,770 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:17:43,770 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [553803365] [2024-06-21 18:17:43,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:17:43,770 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:17:43,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:17:44,044 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:17:44,044 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:17:44,044 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [553803365] [2024-06-21 18:17:44,044 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [553803365] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:17:44,044 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:17:44,044 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 18:17:44,045 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1163048180] [2024-06-21 18:17:44,045 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:17:44,045 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 18:17:44,045 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:17:44,045 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 18:17:44,046 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2024-06-21 18:17:44,094 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 51 [2024-06-21 18:17:44,094 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 278 places, 424 transitions, 5521 flow. Second operand has 9 states, 9 states have (on average 18.77777777777778) internal successors, (169), 9 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:17:44,094 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:17:44,094 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 51 [2024-06-21 18:17:44,094 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:17:46,458 INFO L124 PetriNetUnfolderBase]: 9414/13785 cut-off events. [2024-06-21 18:17:46,458 INFO L125 PetriNetUnfolderBase]: For 899203/899233 co-relation queries the response was YES. [2024-06-21 18:17:46,579 INFO L83 FinitePrefix]: Finished finitePrefix Result has 104290 conditions, 13785 events. 9414/13785 cut-off events. For 899203/899233 co-relation queries the response was YES. Maximal size of possible extension queue 605. Compared 83152 event pairs, 2696 based on Foata normal form. 25/13805 useless extension candidates. Maximal degree in co-relation 104158. Up to 12220 conditions per place. [2024-06-21 18:17:46,655 INFO L140 encePairwiseOnDemand]: 39/51 looper letters, 373 selfloop transitions, 143 changer transitions 0/525 dead transitions. [2024-06-21 18:17:46,656 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 285 places, 525 transitions, 7648 flow [2024-06-21 18:17:46,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 18:17:46,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 18:17:46,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 251 transitions. [2024-06-21 18:17:46,657 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6151960784313726 [2024-06-21 18:17:46,657 INFO L175 Difference]: Start difference. First operand has 278 places, 424 transitions, 5521 flow. Second operand 8 states and 251 transitions. [2024-06-21 18:17:46,657 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 285 places, 525 transitions, 7648 flow [2024-06-21 18:17:48,669 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 282 places, 525 transitions, 7570 flow, removed 19 selfloop flow, removed 3 redundant places. [2024-06-21 18:17:48,675 INFO L231 Difference]: Finished difference. Result has 286 places, 465 transitions, 6352 flow [2024-06-21 18:17:48,675 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=5445, PETRI_DIFFERENCE_MINUEND_PLACES=275, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=424, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=106, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=290, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6352, PETRI_PLACES=286, PETRI_TRANSITIONS=465} [2024-06-21 18:17:48,675 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 232 predicate places. [2024-06-21 18:17:48,675 INFO L495 AbstractCegarLoop]: Abstraction has has 286 places, 465 transitions, 6352 flow [2024-06-21 18:17:48,675 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 18.77777777777778) internal successors, (169), 9 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:17:48,675 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:17:48,675 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:17:48,675 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72 [2024-06-21 18:17:48,676 INFO L420 AbstractCegarLoop]: === Iteration 74 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 18:17:48,676 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:17:48,676 INFO L85 PathProgramCache]: Analyzing trace with hash 654549027, now seen corresponding path program 2 times [2024-06-21 18:17:48,676 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:17:48,676 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1565354511] [2024-06-21 18:17:48,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:17:48,676 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:17:48,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:17:48,841 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:17:48,841 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:17:48,841 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1565354511] [2024-06-21 18:17:48,841 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1565354511] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:17:48,842 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:17:48,842 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 18:17:48,842 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1444862426] [2024-06-21 18:17:48,842 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:17:48,842 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 18:17:48,842 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:17:48,842 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 18:17:48,843 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2024-06-21 18:17:48,903 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 51 [2024-06-21 18:17:48,903 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 286 places, 465 transitions, 6352 flow. Second operand has 9 states, 9 states have (on average 18.77777777777778) internal successors, (169), 9 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:17:48,903 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:17:48,904 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 51 [2024-06-21 18:17:48,904 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:17:51,501 INFO L124 PetriNetUnfolderBase]: 9453/13853 cut-off events. [2024-06-21 18:17:51,501 INFO L125 PetriNetUnfolderBase]: For 942872/942909 co-relation queries the response was YES. [2024-06-21 18:17:51,618 INFO L83 FinitePrefix]: Finished finitePrefix Result has 108150 conditions, 13853 events. 9453/13853 cut-off events. For 942872/942909 co-relation queries the response was YES. Maximal size of possible extension queue 610. Compared 83826 event pairs, 2646 based on Foata normal form. 35/13884 useless extension candidates. Maximal degree in co-relation 108014. Up to 12656 conditions per place. [2024-06-21 18:17:51,693 INFO L140 encePairwiseOnDemand]: 39/51 looper letters, 404 selfloop transitions, 105 changer transitions 0/518 dead transitions. [2024-06-21 18:17:51,693 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 293 places, 518 transitions, 7853 flow [2024-06-21 18:17:51,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 18:17:51,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 18:17:51,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 244 transitions. [2024-06-21 18:17:51,694 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5980392156862745 [2024-06-21 18:17:51,694 INFO L175 Difference]: Start difference. First operand has 286 places, 465 transitions, 6352 flow. Second operand 8 states and 244 transitions. [2024-06-21 18:17:51,694 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 293 places, 518 transitions, 7853 flow [2024-06-21 18:17:53,352 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 291 places, 518 transitions, 7591 flow, removed 94 selfloop flow, removed 2 redundant places. [2024-06-21 18:17:53,358 INFO L231 Difference]: Finished difference. Result has 293 places, 474 transitions, 6472 flow [2024-06-21 18:17:53,358 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=6146, PETRI_DIFFERENCE_MINUEND_PLACES=284, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=465, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=100, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=364, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6472, PETRI_PLACES=293, PETRI_TRANSITIONS=474} [2024-06-21 18:17:53,358 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 239 predicate places. [2024-06-21 18:17:53,358 INFO L495 AbstractCegarLoop]: Abstraction has has 293 places, 474 transitions, 6472 flow [2024-06-21 18:17:53,358 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 18.77777777777778) internal successors, (169), 9 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:17:53,359 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:17:53,359 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:17:53,359 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73 [2024-06-21 18:17:53,359 INFO L420 AbstractCegarLoop]: === Iteration 75 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 18:17:53,359 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:17:53,359 INFO L85 PathProgramCache]: Analyzing trace with hash -1257813311, now seen corresponding path program 3 times [2024-06-21 18:17:53,359 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:17:53,359 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1644862948] [2024-06-21 18:17:53,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:17:53,359 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:17:53,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:17:53,552 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:17:53,552 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:17:53,553 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1644862948] [2024-06-21 18:17:53,553 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1644862948] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:17:53,553 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:17:53,553 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 18:17:53,553 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2056412492] [2024-06-21 18:17:53,553 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:17:53,553 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 18:17:53,553 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:17:53,553 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 18:17:53,553 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2024-06-21 18:17:53,606 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 51 [2024-06-21 18:17:53,606 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 293 places, 474 transitions, 6472 flow. Second operand has 9 states, 9 states have (on average 18.77777777777778) internal successors, (169), 9 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:17:53,606 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:17:53,606 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 51 [2024-06-21 18:17:53,607 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:17:56,296 INFO L124 PetriNetUnfolderBase]: 9446/13844 cut-off events. [2024-06-21 18:17:56,296 INFO L125 PetriNetUnfolderBase]: For 968967/969004 co-relation queries the response was YES. [2024-06-21 18:17:56,410 INFO L83 FinitePrefix]: Finished finitePrefix Result has 108592 conditions, 13844 events. 9446/13844 cut-off events. For 968967/969004 co-relation queries the response was YES. Maximal size of possible extension queue 610. Compared 83735 event pairs, 2646 based on Foata normal form. 35/13875 useless extension candidates. Maximal degree in co-relation 108453. Up to 12649 conditions per place. [2024-06-21 18:17:56,471 INFO L140 encePairwiseOnDemand]: 39/51 looper letters, 409 selfloop transitions, 107 changer transitions 0/525 dead transitions. [2024-06-21 18:17:56,471 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 302 places, 525 transitions, 7655 flow [2024-06-21 18:17:56,472 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 18:17:56,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 18:17:56,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 290 transitions. [2024-06-21 18:17:56,472 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5686274509803921 [2024-06-21 18:17:56,472 INFO L175 Difference]: Start difference. First operand has 293 places, 474 transitions, 6472 flow. Second operand 10 states and 290 transitions. [2024-06-21 18:17:56,472 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 302 places, 525 transitions, 7655 flow [2024-06-21 18:17:58,620 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 297 places, 525 transitions, 7473 flow, removed 35 selfloop flow, removed 5 redundant places. [2024-06-21 18:17:58,627 INFO L231 Difference]: Finished difference. Result has 298 places, 475 transitions, 6527 flow [2024-06-21 18:17:58,627 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=6296, PETRI_DIFFERENCE_MINUEND_PLACES=288, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=474, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=106, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=368, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=6527, PETRI_PLACES=298, PETRI_TRANSITIONS=475} [2024-06-21 18:17:58,627 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 244 predicate places. [2024-06-21 18:17:58,627 INFO L495 AbstractCegarLoop]: Abstraction has has 298 places, 475 transitions, 6527 flow [2024-06-21 18:17:58,627 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 18.77777777777778) internal successors, (169), 9 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:17:58,628 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:17:58,628 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:17:58,628 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74 [2024-06-21 18:17:58,628 INFO L420 AbstractCegarLoop]: === Iteration 76 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 18:17:58,628 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:17:58,628 INFO L85 PathProgramCache]: Analyzing trace with hash -54351837, now seen corresponding path program 4 times [2024-06-21 18:17:58,628 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:17:58,628 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [181604134] [2024-06-21 18:17:58,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:17:58,628 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:17:58,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:17:58,830 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:17:58,830 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:17:58,830 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [181604134] [2024-06-21 18:17:58,830 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [181604134] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:17:58,831 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:17:58,831 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 18:17:58,831 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1196567952] [2024-06-21 18:17:58,831 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:17:58,831 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 18:17:58,831 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:17:58,832 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 18:17:58,832 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2024-06-21 18:17:58,892 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 51 [2024-06-21 18:17:58,892 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 298 places, 475 transitions, 6527 flow. Second operand has 9 states, 9 states have (on average 18.77777777777778) internal successors, (169), 9 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:17:58,892 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:17:58,892 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 51 [2024-06-21 18:17:58,893 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand