./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-wmm/mix053.opt.i --full-output --witness-type correctness_witness --witnessparser.only.consider.loop.invariants false --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --validate ./goblint.2024-06-19_11-23-25.files/protection/mix053.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/mix053.opt.i ./goblint.2024-06-19_11-23-25.files/protection/mix053.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 17:00:44,347 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-21 17:00:44,408 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-21 17:00:44,414 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-21 17:00:44,414 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-21 17:00:44,448 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-21 17:00:44,448 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-21 17:00:44,449 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-21 17:00:44,449 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-21 17:00:44,452 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-21 17:00:44,453 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-21 17:00:44,453 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-21 17:00:44,453 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-21 17:00:44,454 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-21 17:00:44,454 INFO L153 SettingsManager]: * Use SBE=true [2024-06-21 17:00:44,455 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-21 17:00:44,455 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-21 17:00:44,455 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-21 17:00:44,455 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-21 17:00:44,455 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-21 17:00:44,456 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-21 17:00:44,456 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-21 17:00:44,456 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-21 17:00:44,456 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-21 17:00:44,456 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-21 17:00:44,457 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-21 17:00:44,457 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-21 17:00:44,457 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-21 17:00:44,457 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-21 17:00:44,458 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-21 17:00:44,458 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-21 17:00:44,459 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-21 17:00:44,459 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-21 17:00:44,459 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-21 17:00:44,459 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-21 17:00:44,459 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-21 17:00:44,459 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-21 17:00:44,460 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-21 17:00:44,460 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-21 17:00:44,466 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-21 17:00:44,466 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-21 17:00:44,467 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-21 17:00:44,467 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-21 17:00:44,467 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false [2024-06-21 17:00:44,681 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-21 17:00:44,709 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-21 17:00:44,711 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-21 17:00:44,712 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-06-21 17:00:44,713 INFO L274 PluginConnector]: Witness Parser initialized [2024-06-21 17:00:44,714 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-06-19_11-23-25.files/protection/mix053.opt.yml/witness.yml [2024-06-21 17:00:44,857 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-21 17:00:44,857 INFO L274 PluginConnector]: CDTParser initialized [2024-06-21 17:00:44,857 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/mix053.opt.i [2024-06-21 17:00:45,920 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-21 17:00:46,108 INFO L384 CDTParser]: Found 1 translation units. [2024-06-21 17:00:46,109 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/mix053.opt.i [2024-06-21 17:00:46,119 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1b68c08e5/26c68250289e4aa09a28748bf2c54827/FLAGf0b5f26e4 [2024-06-21 17:00:46,129 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1b68c08e5/26c68250289e4aa09a28748bf2c54827 [2024-06-21 17:00:46,129 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-21 17:00:46,130 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-06-21 17:00:46,132 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-21 17:00:46,132 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-21 17:00:46,136 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-21 17:00:46,137 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 21.06 05:00:44" (1/2) ... [2024-06-21 17:00:46,138 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1e9b2427 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 05:00:46, skipping insertion in model container [2024-06-21 17:00:46,138 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 21.06 05:00:44" (1/2) ... [2024-06-21 17:00:46,139 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@1484ccf1 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 05:00:46, skipping insertion in model container [2024-06-21 17:00:46,139 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.06 05:00:46" (2/2) ... [2024-06-21 17:00:46,140 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1e9b2427 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 05:00:46, skipping insertion in model container [2024-06-21 17:00:46,141 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.06 05:00:46" (2/2) ... [2024-06-21 17:00:46,141 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-06-21 17:00:46,228 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-06-21 17:00:46,230 INFO L97 edCorrectnessWitness]: Location invariant before [L852-L852] ((((((((((((((((((((! multithreaded || z$flush_delayed == (_Bool)0) && (! multithreaded || z$read_delayed == (_Bool)0)) && (! multithreaded || (z$w_buff1 == 0 || z$w_buff1 == 1))) && (! multithreaded || z$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || z$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || z$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || (__unbuffered_p3_EAX == 0 || __unbuffered_p3_EAX == 1))) && (! multithreaded || z$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || ((y == 0 || y == 1) || y == 2))) && (! multithreaded || (z == 0 || z == 1))) && (! multithreaded || (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1))) && (! multithreaded || z$read_delayed_var == 0)) && (! multithreaded || ((x == 0 || x == 1) || x == 2))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || (z$w_buff0 == 0 || z$w_buff0 == 1))) && (! multithreaded || z$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || (a == 0 || a == 1))) && (! multithreaded || (z$mem_tmp == 0 || z$mem_tmp == 1))) && (! multithreaded || z$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || z$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || z$r_buff1_thd2 == (_Bool)0) [2024-06-21 17:00:46,230 INFO L97 edCorrectnessWitness]: Location invariant before [L849-L849] ((((((((((((((((((((! multithreaded || z$flush_delayed == (_Bool)0) && (! multithreaded || z$read_delayed == (_Bool)0)) && (! multithreaded || (z$w_buff1 == 0 || z$w_buff1 == 1))) && (! multithreaded || z$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || z$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || z$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || (__unbuffered_p3_EAX == 0 || __unbuffered_p3_EAX == 1))) && (! multithreaded || z$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || ((y == 0 || y == 1) || y == 2))) && (! multithreaded || (z == 0 || z == 1))) && (! multithreaded || (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1))) && (! multithreaded || z$read_delayed_var == 0)) && (! multithreaded || ((x == 0 || x == 1) || x == 2))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || (z$w_buff0 == 0 || z$w_buff0 == 1))) && (! multithreaded || z$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || (a == 0 || a == 1))) && (! multithreaded || (z$mem_tmp == 0 || z$mem_tmp == 1))) && (! multithreaded || z$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || z$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || z$r_buff1_thd2 == (_Bool)0) [2024-06-21 17:00:46,230 INFO L97 edCorrectnessWitness]: Location invariant before [L847-L847] ((((((((((((((((((((! multithreaded || z$flush_delayed == (_Bool)0) && (! multithreaded || z$read_delayed == (_Bool)0)) && (! multithreaded || (z$w_buff1 == 0 || z$w_buff1 == 1))) && (! multithreaded || z$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || z$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || z$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || (__unbuffered_p3_EAX == 0 || __unbuffered_p3_EAX == 1))) && (! multithreaded || z$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || ((y == 0 || y == 1) || y == 2))) && (! multithreaded || (z == 0 || z == 1))) && (! multithreaded || (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1))) && (! multithreaded || z$read_delayed_var == 0)) && (! multithreaded || ((x == 0 || x == 1) || x == 2))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || (z$w_buff0 == 0 || z$w_buff0 == 1))) && (! multithreaded || z$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || (a == 0 || a == 1))) && (! multithreaded || (z$mem_tmp == 0 || z$mem_tmp == 1))) && (! multithreaded || z$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || z$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || z$r_buff1_thd2 == (_Bool)0) [2024-06-21 17:00:46,230 INFO L97 edCorrectnessWitness]: Location invariant before [L851-L851] ((((((((((((((((((((! multithreaded || z$flush_delayed == (_Bool)0) && (! multithreaded || z$read_delayed == (_Bool)0)) && (! multithreaded || (z$w_buff1 == 0 || z$w_buff1 == 1))) && (! multithreaded || z$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || z$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || z$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || (__unbuffered_p3_EAX == 0 || __unbuffered_p3_EAX == 1))) && (! multithreaded || z$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || ((y == 0 || y == 1) || y == 2))) && (! multithreaded || (z == 0 || z == 1))) && (! multithreaded || (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1))) && (! multithreaded || z$read_delayed_var == 0)) && (! multithreaded || ((x == 0 || x == 1) || x == 2))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || (z$w_buff0 == 0 || z$w_buff0 == 1))) && (! multithreaded || z$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || (a == 0 || a == 1))) && (! multithreaded || (z$mem_tmp == 0 || z$mem_tmp == 1))) && (! multithreaded || z$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || z$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || z$r_buff1_thd2 == (_Bool)0) [2024-06-21 17:00:46,230 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-06-21 17:00:46,231 INFO L106 edCorrectnessWitness]: ghost_update [L845-L845] multithreaded = 1; [2024-06-21 17:00:46,267 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-21 17:00:46,570 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-21 17:00:46,579 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 17:00:46,702 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-21 17:00:46,743 INFO L206 MainTranslator]: Completed translation [2024-06-21 17:00:46,743 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 05:00:46 WrapperNode [2024-06-21 17:00:46,743 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-21 17:00:46,745 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-21 17:00:46,745 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-21 17:00:46,745 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-21 17:00:46,752 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 05:00:46" (1/1) ... [2024-06-21 17:00:46,792 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 05:00:46" (1/1) ... [2024-06-21 17:00:46,835 INFO L138 Inliner]: procedures = 176, calls = 52, calls flagged for inlining = 6, calls inlined = 7, statements flattened = 137 [2024-06-21 17:00:46,839 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-21 17:00:46,840 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-21 17:00:46,840 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-21 17:00:46,841 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-21 17:00:46,849 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 05:00:46" (1/1) ... [2024-06-21 17:00:46,849 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 05:00:46" (1/1) ... [2024-06-21 17:00:46,860 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 05:00:46" (1/1) ... [2024-06-21 17:00:46,882 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 17:00:46,886 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 05:00:46" (1/1) ... [2024-06-21 17:00:46,886 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 05:00:46" (1/1) ... [2024-06-21 17:00:46,897 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 05:00:46" (1/1) ... [2024-06-21 17:00:46,913 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 05:00:46" (1/1) ... [2024-06-21 17:00:46,915 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 05:00:46" (1/1) ... [2024-06-21 17:00:46,916 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 05:00:46" (1/1) ... [2024-06-21 17:00:46,918 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-21 17:00:46,919 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-21 17:00:46,919 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-21 17:00:46,919 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-21 17:00:46,920 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 05:00:46" (1/1) ... [2024-06-21 17:00:46,930 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-21 17:00:46,936 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-21 17:00:46,949 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 17:00:46,967 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 17:00:46,981 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-06-21 17:00:46,981 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-21 17:00:46,981 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2024-06-21 17:00:46,982 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2024-06-21 17:00:46,982 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2024-06-21 17:00:46,982 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2024-06-21 17:00:46,982 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2024-06-21 17:00:46,982 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2024-06-21 17:00:46,982 INFO L130 BoogieDeclarations]: Found specification of procedure P3 [2024-06-21 17:00:46,982 INFO L138 BoogieDeclarations]: Found implementation of procedure P3 [2024-06-21 17:00:46,982 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-21 17:00:46,983 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-06-21 17:00:46,983 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-21 17:00:46,983 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-21 17:00:46,984 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 17:00:47,073 INFO L244 CfgBuilder]: Building ICFG [2024-06-21 17:00:47,075 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-21 17:00:47,407 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-21 17:00:47,407 INFO L293 CfgBuilder]: Performing block encoding [2024-06-21 17:00:47,540 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-21 17:00:47,541 INFO L320 CfgBuilder]: Removed 0 assume(true) statements. [2024-06-21 17:00:47,542 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.06 05:00:47 BoogieIcfgContainer [2024-06-21 17:00:47,542 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-21 17:00:47,544 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-21 17:00:47,544 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-21 17:00:47,547 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-21 17:00:47,547 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 21.06 05:00:44" (1/4) ... [2024-06-21 17:00:47,547 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4db474d and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 21.06 05:00:47, skipping insertion in model container [2024-06-21 17:00:47,548 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.06 05:00:46" (2/4) ... [2024-06-21 17:00:47,548 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4db474d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.06 05:00:47, skipping insertion in model container [2024-06-21 17:00:47,548 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 05:00:46" (3/4) ... [2024-06-21 17:00:47,549 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4db474d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.06 05:00:47, skipping insertion in model container [2024-06-21 17:00:47,549 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.06 05:00:47" (4/4) ... [2024-06-21 17:00:47,550 INFO L112 eAbstractionObserver]: Analyzing ICFG mix053.opt.i [2024-06-21 17:00:47,562 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-21 17:00:47,562 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 4 error locations. [2024-06-21 17:00:47,562 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-21 17:00:47,610 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-06-21 17:00:47,639 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 64 places, 51 transitions, 118 flow [2024-06-21 17:00:47,669 INFO L124 PetriNetUnfolderBase]: 0/47 cut-off events. [2024-06-21 17:00:47,669 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-21 17:00:47,672 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 83 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 17:00:47,672 INFO L82 GeneralOperation]: Start removeDead. Operand has 64 places, 51 transitions, 118 flow [2024-06-21 17:00:47,675 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 54 places, 41 transitions, 94 flow [2024-06-21 17:00:47,688 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-21 17:00:47,693 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;@6f1d492c, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-21 17:00:47,694 INFO L358 AbstractCegarLoop]: Starting to check reachability of 8 error locations. [2024-06-21 17:00:47,698 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-21 17:00:47,698 INFO L124 PetriNetUnfolderBase]: 0/5 cut-off events. [2024-06-21 17:00:47,698 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-21 17:00:47,698 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:00:47,699 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2024-06-21 17:00:47,699 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 17:00:47,703 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:00:47,703 INFO L85 PathProgramCache]: Analyzing trace with hash 372441680, now seen corresponding path program 1 times [2024-06-21 17:00:47,712 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:00:47,712 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1027557425] [2024-06-21 17:00:47,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:00:47,713 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:00:47,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:00:48,469 INFO 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 17:00:48,469 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:00:48,470 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1027557425] [2024-06-21 17:00:48,470 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1027557425] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:00:48,470 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:00:48,470 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-06-21 17:00:48,472 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [749806358] [2024-06-21 17:00:48,472 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:00:48,478 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-21 17:00:48,482 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:00:48,498 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-21 17:00:48,499 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-21 17:00:48,533 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 51 [2024-06-21 17:00:48,536 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 41 transitions, 94 flow. Second operand has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:00:48,536 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:00:48,536 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 51 [2024-06-21 17:00:48,537 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:00:49,543 INFO L124 PetriNetUnfolderBase]: 6742/9590 cut-off events. [2024-06-21 17:00:49,544 INFO L125 PetriNetUnfolderBase]: For 153/153 co-relation queries the response was YES. [2024-06-21 17:00:49,557 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19142 conditions, 9590 events. 6742/9590 cut-off events. For 153/153 co-relation queries the response was YES. Maximal size of possible extension queue 375. Compared 52856 event pairs, 5078 based on Foata normal form. 1/9336 useless extension candidates. Maximal degree in co-relation 19129. Up to 9223 conditions per place. [2024-06-21 17:00:49,596 INFO L140 encePairwiseOnDemand]: 42/51 looper letters, 41 selfloop transitions, 5 changer transitions 0/55 dead transitions. [2024-06-21 17:00:49,597 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 55 transitions, 223 flow [2024-06-21 17:00:49,598 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-21 17:00:49,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-21 17:00:49,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 98 transitions. [2024-06-21 17:00:49,605 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6405228758169934 [2024-06-21 17:00:49,607 INFO L175 Difference]: Start difference. First operand has 54 places, 41 transitions, 94 flow. Second operand 3 states and 98 transitions. [2024-06-21 17:00:49,607 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 55 transitions, 223 flow [2024-06-21 17:00:49,609 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 55 transitions, 216 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-06-21 17:00:49,611 INFO L231 Difference]: Finished difference. Result has 53 places, 45 transitions, 129 flow [2024-06-21 17:00:49,613 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 17:00:49,615 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, -1 predicate places. [2024-06-21 17:00:49,615 INFO L495 AbstractCegarLoop]: Abstraction has has 53 places, 45 transitions, 129 flow [2024-06-21 17:00:49,616 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:00:49,616 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:00:49,616 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:00:49,616 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-21 17:00:49,616 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 17:00:49,617 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:00:49,617 INFO L85 PathProgramCache]: Analyzing trace with hash 1435499765, now seen corresponding path program 1 times [2024-06-21 17:00:49,617 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:00:49,617 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [958690435] [2024-06-21 17:00:49,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:00:49,618 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:00:49,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:00:50,083 INFO 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 17:00:50,083 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:00:50,083 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [958690435] [2024-06-21 17:00:50,083 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [958690435] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:00:50,084 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:00:50,084 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-21 17:00:50,084 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1350150881] [2024-06-21 17:00:50,084 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:00:50,085 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-21 17:00:50,085 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:00:50,086 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-21 17:00:50,086 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-06-21 17:00:50,111 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 51 [2024-06-21 17:00:50,111 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 45 transitions, 129 flow. Second operand has 4 states, 4 states have (on average 16.25) internal successors, (65), 4 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:00:50,111 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:00:50,112 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 51 [2024-06-21 17:00:50,112 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:00:51,025 INFO L124 PetriNetUnfolderBase]: 7882/10901 cut-off events. [2024-06-21 17:00:51,025 INFO L125 PetriNetUnfolderBase]: For 2113/2113 co-relation queries the response was YES. [2024-06-21 17:00:51,037 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24939 conditions, 10901 events. 7882/10901 cut-off events. For 2113/2113 co-relation queries the response was YES. Maximal size of possible extension queue 422. Compared 58033 event pairs, 5323 based on Foata normal form. 4/10853 useless extension candidates. Maximal degree in co-relation 24927. Up to 10713 conditions per place. [2024-06-21 17:00:51,073 INFO L140 encePairwiseOnDemand]: 41/51 looper letters, 52 selfloop transitions, 9 changer transitions 0/69 dead transitions. [2024-06-21 17:00:51,074 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 69 transitions, 317 flow [2024-06-21 17:00:51,074 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-21 17:00:51,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-21 17:00:51,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 125 transitions. [2024-06-21 17:00:51,075 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6127450980392157 [2024-06-21 17:00:51,075 INFO L175 Difference]: Start difference. First operand has 53 places, 45 transitions, 129 flow. Second operand 4 states and 125 transitions. [2024-06-21 17:00:51,075 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 69 transitions, 317 flow [2024-06-21 17:00:51,076 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 69 transitions, 312 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-21 17:00:51,077 INFO L231 Difference]: Finished difference. Result has 56 places, 49 transitions, 177 flow [2024-06-21 17:00:51,078 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=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=177, PETRI_PLACES=56, PETRI_TRANSITIONS=49} [2024-06-21 17:00:51,078 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 2 predicate places. [2024-06-21 17:00:51,078 INFO L495 AbstractCegarLoop]: Abstraction has has 56 places, 49 transitions, 177 flow [2024-06-21 17:00:51,079 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 16.25) internal successors, (65), 4 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:00:51,079 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:00:51,079 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:00:51,079 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-06-21 17:00:51,079 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 17:00:51,080 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:00:51,080 INFO L85 PathProgramCache]: Analyzing trace with hash 1550820863, now seen corresponding path program 1 times [2024-06-21 17:00:51,080 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:00:51,080 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [751029274] [2024-06-21 17:00:51,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:00:51,080 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:00:51,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:00:51,579 INFO 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 17:00:51,579 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:00:51,580 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [751029274] [2024-06-21 17:00:51,580 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [751029274] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:00:51,580 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:00:51,580 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-21 17:00:51,580 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1739120785] [2024-06-21 17:00:51,580 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:00:51,581 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-21 17:00:51,581 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:00:51,581 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-21 17:00:51,581 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-21 17:00:51,655 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 51 [2024-06-21 17:00:51,656 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 49 transitions, 177 flow. Second operand has 5 states, 5 states have (on average 16.2) internal successors, (81), 5 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:00:51,656 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:00:51,656 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 51 [2024-06-21 17:00:51,656 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:00:52,602 INFO L124 PetriNetUnfolderBase]: 7900/10989 cut-off events. [2024-06-21 17:00:52,603 INFO L125 PetriNetUnfolderBase]: For 6160/6160 co-relation queries the response was YES. [2024-06-21 17:00:52,618 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28019 conditions, 10989 events. 7900/10989 cut-off events. For 6160/6160 co-relation queries the response was YES. Maximal size of possible extension queue 425. Compared 59132 event pairs, 4142 based on Foata normal form. 7/10978 useless extension candidates. Maximal degree in co-relation 28005. Up to 10634 conditions per place. [2024-06-21 17:00:52,666 INFO L140 encePairwiseOnDemand]: 39/51 looper letters, 70 selfloop transitions, 21 changer transitions 0/99 dead transitions. [2024-06-21 17:00:52,667 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 99 transitions, 533 flow [2024-06-21 17:00:52,667 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-21 17:00:52,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-21 17:00:52,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 164 transitions. [2024-06-21 17:00:52,671 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6431372549019608 [2024-06-21 17:00:52,672 INFO L175 Difference]: Start difference. First operand has 56 places, 49 transitions, 177 flow. Second operand 5 states and 164 transitions. [2024-06-21 17:00:52,672 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 99 transitions, 533 flow [2024-06-21 17:00:52,676 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 99 transitions, 514 flow, removed 3 selfloop flow, removed 2 redundant places. [2024-06-21 17:00:52,678 INFO L231 Difference]: Finished difference. Result has 61 places, 63 transitions, 308 flow [2024-06-21 17:00:52,678 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=158, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=308, PETRI_PLACES=61, PETRI_TRANSITIONS=63} [2024-06-21 17:00:52,679 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 7 predicate places. [2024-06-21 17:00:52,679 INFO L495 AbstractCegarLoop]: Abstraction has has 61 places, 63 transitions, 308 flow [2024-06-21 17:00:52,679 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 16.2) internal successors, (81), 5 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:00:52,679 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:00:52,680 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:00:52,680 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-06-21 17:00:52,680 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 17:00:52,680 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:00:52,680 INFO L85 PathProgramCache]: Analyzing trace with hash -9414076, now seen corresponding path program 1 times [2024-06-21 17:00:52,681 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:00:52,681 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [13500627] [2024-06-21 17:00:52,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:00:52,681 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:00:52,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:00:53,518 INFO 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 17:00:53,518 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:00:53,519 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [13500627] [2024-06-21 17:00:53,519 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [13500627] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:00:53,519 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:00:53,519 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 17:00:53,519 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1928780079] [2024-06-21 17:00:53,519 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:00:53,519 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 17:00:53,520 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:00:53,520 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 17:00:53,520 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-21 17:00:53,585 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 51 [2024-06-21 17:00:53,586 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 63 transitions, 308 flow. Second operand has 6 states, 6 states have (on average 16.166666666666668) internal successors, (97), 6 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:00:53,586 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:00:53,586 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 51 [2024-06-21 17:00:53,586 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:00:54,579 INFO L124 PetriNetUnfolderBase]: 7929/11036 cut-off events. [2024-06-21 17:00:54,579 INFO L125 PetriNetUnfolderBase]: For 14683/14688 co-relation queries the response was YES. [2024-06-21 17:00:54,599 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32942 conditions, 11036 events. 7929/11036 cut-off events. For 14683/14688 co-relation queries the response was YES. Maximal size of possible extension queue 426. Compared 59549 event pairs, 3337 based on Foata normal form. 18/11036 useless extension candidates. Maximal degree in co-relation 32925. Up to 10599 conditions per place. [2024-06-21 17:00:54,633 INFO L140 encePairwiseOnDemand]: 39/51 looper letters, 77 selfloop transitions, 25 changer transitions 0/110 dead transitions. [2024-06-21 17:00:54,634 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 110 transitions, 678 flow [2024-06-21 17:00:54,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 17:00:54,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 17:00:54,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 190 transitions. [2024-06-21 17:00:54,635 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6209150326797386 [2024-06-21 17:00:54,635 INFO L175 Difference]: Start difference. First operand has 61 places, 63 transitions, 308 flow. Second operand 6 states and 190 transitions. [2024-06-21 17:00:54,635 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 110 transitions, 678 flow [2024-06-21 17:00:54,643 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 110 transitions, 666 flow, removed 6 selfloop flow, removed 0 redundant places. [2024-06-21 17:00:54,645 INFO L231 Difference]: Finished difference. Result has 66 places, 66 transitions, 385 flow [2024-06-21 17:00:54,645 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=288, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=62, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=385, PETRI_PLACES=66, PETRI_TRANSITIONS=66} [2024-06-21 17:00:54,646 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 12 predicate places. [2024-06-21 17:00:54,646 INFO L495 AbstractCegarLoop]: Abstraction has has 66 places, 66 transitions, 385 flow [2024-06-21 17:00:54,646 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.166666666666668) internal successors, (97), 6 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:00:54,647 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:00:54,647 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:00:54,647 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-06-21 17:00:54,647 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 17:00:54,647 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:00:54,647 INFO L85 PathProgramCache]: Analyzing trace with hash -586491835, now seen corresponding path program 1 times [2024-06-21 17:00:54,648 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:00:54,648 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [823367120] [2024-06-21 17:00:54,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:00:54,648 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:00:54,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:00:55,177 INFO 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 17:00:55,177 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:00:55,177 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [823367120] [2024-06-21 17:00:55,178 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [823367120] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:00:55,178 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:00:55,178 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 17:00:55,178 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1323023042] [2024-06-21 17:00:55,178 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:00:55,178 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 17:00:55,179 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:00:55,179 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 17:00:55,179 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-06-21 17:00:55,242 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 51 [2024-06-21 17:00:55,242 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 66 transitions, 385 flow. Second operand has 6 states, 6 states have (on average 15.5) internal successors, (93), 6 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:00:55,242 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:00:55,242 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 51 [2024-06-21 17:00:55,242 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:00:56,123 INFO L124 PetriNetUnfolderBase]: 6770/9678 cut-off events. [2024-06-21 17:00:56,124 INFO L125 PetriNetUnfolderBase]: For 18698/18698 co-relation queries the response was YES. [2024-06-21 17:00:56,146 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31444 conditions, 9678 events. 6770/9678 cut-off events. For 18698/18698 co-relation queries the response was YES. Maximal size of possible extension queue 379. Compared 53991 event pairs, 3368 based on Foata normal form. 3/9620 useless extension candidates. Maximal degree in co-relation 31423. Up to 9250 conditions per place. [2024-06-21 17:00:56,184 INFO L140 encePairwiseOnDemand]: 41/51 looper letters, 65 selfloop transitions, 10 changer transitions 0/83 dead transitions. [2024-06-21 17:00:56,184 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 83 transitions, 579 flow [2024-06-21 17:00:56,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-21 17:00:56,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-21 17:00:56,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 130 transitions. [2024-06-21 17:00:56,186 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5098039215686274 [2024-06-21 17:00:56,186 INFO L175 Difference]: Start difference. First operand has 66 places, 66 transitions, 385 flow. Second operand 5 states and 130 transitions. [2024-06-21 17:00:56,186 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 83 transitions, 579 flow [2024-06-21 17:00:56,192 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 83 transitions, 510 flow, removed 12 selfloop flow, removed 4 redundant places. [2024-06-21 17:00:56,194 INFO L231 Difference]: Finished difference. Result has 67 places, 66 transitions, 347 flow [2024-06-21 17:00:56,194 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=316, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=66, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=347, PETRI_PLACES=67, PETRI_TRANSITIONS=66} [2024-06-21 17:00:56,194 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 13 predicate places. [2024-06-21 17:00:56,195 INFO L495 AbstractCegarLoop]: Abstraction has has 67 places, 66 transitions, 347 flow [2024-06-21 17:00:56,195 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.5) internal successors, (93), 6 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:00:56,195 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:00:56,195 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:00:56,195 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-06-21 17:00:56,195 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 17:00:56,196 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:00:56,196 INFO L85 PathProgramCache]: Analyzing trace with hash -1007863547, now seen corresponding path program 1 times [2024-06-21 17:00:56,196 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:00:56,196 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [915947998] [2024-06-21 17:00:56,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:00:56,196 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:00:56,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:00:56,801 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 17:00:56,801 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:00:56,802 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [915947998] [2024-06-21 17:00:56,802 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [915947998] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:00:56,802 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:00:56,802 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 17:00:56,803 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1637757938] [2024-06-21 17:00:56,803 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:00:56,803 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 17:00:56,803 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:00:56,804 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 17:00:56,804 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-21 17:00:56,890 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 51 [2024-06-21 17:00:56,891 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 66 transitions, 347 flow. Second operand has 7 states, 7 states have (on average 15.428571428571429) internal successors, (108), 7 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:00:56,891 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:00:56,891 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 51 [2024-06-21 17:00:56,891 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:00:58,111 INFO L124 PetriNetUnfolderBase]: 6803/9900 cut-off events. [2024-06-21 17:00:58,112 INFO L125 PetriNetUnfolderBase]: For 21782/21782 co-relation queries the response was YES. [2024-06-21 17:00:58,137 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32154 conditions, 9900 events. 6803/9900 cut-off events. For 21782/21782 co-relation queries the response was YES. Maximal size of possible extension queue 388. Compared 56210 event pairs, 3202 based on Foata normal form. 7/9897 useless extension candidates. Maximal degree in co-relation 32131. Up to 9164 conditions per place. [2024-06-21 17:00:58,177 INFO L140 encePairwiseOnDemand]: 39/51 looper letters, 81 selfloop transitions, 22 changer transitions 0/111 dead transitions. [2024-06-21 17:00:58,177 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 111 transitions, 753 flow [2024-06-21 17:00:58,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 17:00:58,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 17:00:58,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 166 transitions. [2024-06-21 17:00:58,179 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5424836601307189 [2024-06-21 17:00:58,179 INFO L175 Difference]: Start difference. First operand has 67 places, 66 transitions, 347 flow. Second operand 6 states and 166 transitions. [2024-06-21 17:00:58,179 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 111 transitions, 753 flow [2024-06-21 17:00:58,189 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 111 transitions, 724 flow, removed 3 selfloop flow, removed 4 redundant places. [2024-06-21 17:00:58,190 INFO L231 Difference]: Finished difference. Result has 71 places, 80 transitions, 492 flow [2024-06-21 17:00:58,191 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=318, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=66, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=492, PETRI_PLACES=71, PETRI_TRANSITIONS=80} [2024-06-21 17:00:58,191 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 17 predicate places. [2024-06-21 17:00:58,191 INFO L495 AbstractCegarLoop]: Abstraction has has 71 places, 80 transitions, 492 flow [2024-06-21 17:00:58,192 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.428571428571429) internal successors, (108), 7 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:00:58,192 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:00:58,192 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:00:58,192 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-06-21 17:00:58,192 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 17:00:58,192 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:00:58,193 INFO L85 PathProgramCache]: Analyzing trace with hash -1184719806, now seen corresponding path program 1 times [2024-06-21 17:00:58,193 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:00:58,193 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [9785243] [2024-06-21 17:00:58,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:00:58,193 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:00:58,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:00:58,843 INFO 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 17:00:58,843 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:00:58,843 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [9785243] [2024-06-21 17:00:58,843 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [9785243] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:00:58,844 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:00:58,844 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 17:00:58,844 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1506442914] [2024-06-21 17:00:58,844 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:00:58,844 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 17:00:58,845 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:00:58,845 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 17:00:58,845 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-21 17:00:58,910 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 51 [2024-06-21 17:00:58,910 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 80 transitions, 492 flow. Second operand has 7 states, 7 states have (on average 14.428571428571429) internal successors, (101), 7 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 17:00:58,910 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:00:58,910 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 51 [2024-06-21 17:00:58,910 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:01:00,099 INFO L124 PetriNetUnfolderBase]: 7966/11091 cut-off events. [2024-06-21 17:01:00,099 INFO L125 PetriNetUnfolderBase]: For 39120/39130 co-relation queries the response was YES. [2024-06-21 17:01:00,122 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41355 conditions, 11091 events. 7966/11091 cut-off events. For 39120/39130 co-relation queries the response was YES. Maximal size of possible extension queue 425. Compared 59496 event pairs, 3875 based on Foata normal form. 14/11093 useless extension candidates. Maximal degree in co-relation 41330. Up to 10721 conditions per place. [2024-06-21 17:01:00,160 INFO L140 encePairwiseOnDemand]: 39/51 looper letters, 82 selfloop transitions, 25 changer transitions 0/114 dead transitions. [2024-06-21 17:01:00,161 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 114 transitions, 849 flow [2024-06-21 17:01:00,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 17:01:00,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 17:01:00,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 160 transitions. [2024-06-21 17:01:00,162 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5228758169934641 [2024-06-21 17:01:00,162 INFO L175 Difference]: Start difference. First operand has 71 places, 80 transitions, 492 flow. Second operand 6 states and 160 transitions. [2024-06-21 17:01:00,162 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 114 transitions, 849 flow [2024-06-21 17:01:00,181 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 114 transitions, 825 flow, removed 11 selfloop flow, removed 1 redundant places. [2024-06-21 17:01:00,183 INFO L231 Difference]: Finished difference. Result has 76 places, 84 transitions, 564 flow [2024-06-21 17:01:00,183 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=468, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=80, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=564, PETRI_PLACES=76, PETRI_TRANSITIONS=84} [2024-06-21 17:01:00,184 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 22 predicate places. [2024-06-21 17:01:00,184 INFO L495 AbstractCegarLoop]: Abstraction has has 76 places, 84 transitions, 564 flow [2024-06-21 17:01:00,184 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 14.428571428571429) internal successors, (101), 7 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 17:01:00,184 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:01:00,184 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:01:00,184 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-06-21 17:01:00,185 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 17:01:00,185 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:01:00,185 INFO L85 PathProgramCache]: Analyzing trace with hash -977916636, now seen corresponding path program 2 times [2024-06-21 17:01:00,185 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:01:00,185 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [598620342] [2024-06-21 17:01:00,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:01:00,186 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:01:00,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:01:00,752 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:01:00,752 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:01:00,752 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [598620342] [2024-06-21 17:01:00,753 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [598620342] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:01:00,753 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:01:00,753 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 17:01:00,753 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1575524481] [2024-06-21 17:01:00,753 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:01:00,753 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 17:01:00,753 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:01:00,753 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 17:01:00,753 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-21 17:01:00,819 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 51 [2024-06-21 17:01:00,819 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 84 transitions, 564 flow. Second operand has 7 states, 7 states have (on average 14.428571428571429) internal successors, (101), 7 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 17:01:00,819 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:01:00,820 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 51 [2024-06-21 17:01:00,820 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:01:01,899 INFO L124 PetriNetUnfolderBase]: 7942/11043 cut-off events. [2024-06-21 17:01:01,900 INFO L125 PetriNetUnfolderBase]: For 43574/43574 co-relation queries the response was YES. [2024-06-21 17:01:01,927 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41698 conditions, 11043 events. 7942/11043 cut-off events. For 43574/43574 co-relation queries the response was YES. Maximal size of possible extension queue 425. Compared 59047 event pairs, 3895 based on Foata normal form. 3/11029 useless extension candidates. Maximal degree in co-relation 41670. Up to 10691 conditions per place. [2024-06-21 17:01:01,969 INFO L140 encePairwiseOnDemand]: 39/51 looper letters, 75 selfloop transitions, 26 changer transitions 0/108 dead transitions. [2024-06-21 17:01:01,969 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 81 places, 108 transitions, 828 flow [2024-06-21 17:01:01,970 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 17:01:01,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 17:01:01,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 155 transitions. [2024-06-21 17:01:01,970 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5065359477124183 [2024-06-21 17:01:01,971 INFO L175 Difference]: Start difference. First operand has 76 places, 84 transitions, 564 flow. Second operand 6 states and 155 transitions. [2024-06-21 17:01:01,971 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 81 places, 108 transitions, 828 flow [2024-06-21 17:01:02,000 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 108 transitions, 785 flow, removed 7 selfloop flow, removed 3 redundant places. [2024-06-21 17:01:02,002 INFO L231 Difference]: Finished difference. Result has 79 places, 84 transitions, 584 flow [2024-06-21 17:01:02,002 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=521, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=84, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=584, PETRI_PLACES=79, PETRI_TRANSITIONS=84} [2024-06-21 17:01:02,003 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 25 predicate places. [2024-06-21 17:01:02,003 INFO L495 AbstractCegarLoop]: Abstraction has has 79 places, 84 transitions, 584 flow [2024-06-21 17:01:02,003 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 14.428571428571429) internal successors, (101), 7 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 17:01:02,003 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:01:02,003 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:01:02,003 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-06-21 17:01:02,003 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 17:01:02,006 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:01:02,006 INFO L85 PathProgramCache]: Analyzing trace with hash -161430010, now seen corresponding path program 1 times [2024-06-21 17:01:02,006 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:01:02,006 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1481764166] [2024-06-21 17:01:02,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:01:02,007 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:01:02,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:01:02,727 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:01:02,727 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:01:02,727 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1481764166] [2024-06-21 17:01:02,727 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1481764166] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:01:02,727 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:01:02,727 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 17:01:02,727 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [508693739] [2024-06-21 17:01:02,727 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:01:02,727 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 17:01:02,728 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:01:02,728 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 17:01:02,728 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2024-06-21 17:01:02,820 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 51 [2024-06-21 17:01:02,821 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 84 transitions, 584 flow. Second operand has 8 states, 8 states have (on average 14.375) internal successors, (115), 8 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:01:02,821 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:01:02,821 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 51 [2024-06-21 17:01:02,821 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:01:04,064 INFO L124 PetriNetUnfolderBase]: 8752/12216 cut-off events. [2024-06-21 17:01:04,064 INFO L125 PetriNetUnfolderBase]: For 56130/56134 co-relation queries the response was YES. [2024-06-21 17:01:04,095 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47340 conditions, 12216 events. 8752/12216 cut-off events. For 56130/56134 co-relation queries the response was YES. Maximal size of possible extension queue 422. Compared 65899 event pairs, 3183 based on Foata normal form. 15/12217 useless extension candidates. Maximal degree in co-relation 47311. Up to 10613 conditions per place. [2024-06-21 17:01:04,138 INFO L140 encePairwiseOnDemand]: 34/51 looper letters, 126 selfloop transitions, 59 changer transitions 0/192 dead transitions. [2024-06-21 17:01:04,139 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 86 places, 192 transitions, 1678 flow [2024-06-21 17:01:04,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 17:01:04,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 17:01:04,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 233 transitions. [2024-06-21 17:01:04,140 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.571078431372549 [2024-06-21 17:01:04,140 INFO L175 Difference]: Start difference. First operand has 79 places, 84 transitions, 584 flow. Second operand 8 states and 233 transitions. [2024-06-21 17:01:04,140 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 86 places, 192 transitions, 1678 flow [2024-06-21 17:01:04,183 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 192 transitions, 1515 flow, removed 8 selfloop flow, removed 6 redundant places. [2024-06-21 17:01:04,185 INFO L231 Difference]: Finished difference. Result has 84 places, 120 transitions, 935 flow [2024-06-21 17:01:04,186 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=500, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=84, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=935, PETRI_PLACES=84, PETRI_TRANSITIONS=120} [2024-06-21 17:01:04,186 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 30 predicate places. [2024-06-21 17:01:04,186 INFO L495 AbstractCegarLoop]: Abstraction has has 84 places, 120 transitions, 935 flow [2024-06-21 17:01:04,186 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 14.375) internal successors, (115), 8 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:01:04,187 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:01:04,187 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:01:04,187 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-06-21 17:01:04,187 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 17:01:04,187 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:01:04,187 INFO L85 PathProgramCache]: Analyzing trace with hash 1928392582, now seen corresponding path program 2 times [2024-06-21 17:01:04,187 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:01:04,188 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2062926085] [2024-06-21 17:01:04,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:01:04,188 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:01:04,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:01:04,911 INFO 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 17:01:04,911 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:01:04,911 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2062926085] [2024-06-21 17:01:04,911 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2062926085] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:01:04,911 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:01:04,911 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 17:01:04,912 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1837463175] [2024-06-21 17:01:04,912 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:01:04,913 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 17:01:04,914 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:01:04,915 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 17:01:04,916 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-21 17:01:05,008 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 51 [2024-06-21 17:01:05,008 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 84 places, 120 transitions, 935 flow. Second operand has 8 states, 8 states have (on average 14.375) internal successors, (115), 8 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:01:05,008 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:01:05,008 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 51 [2024-06-21 17:01:05,008 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:01:06,508 INFO L124 PetriNetUnfolderBase]: 9368/13179 cut-off events. [2024-06-21 17:01:06,508 INFO L125 PetriNetUnfolderBase]: For 83908/83918 co-relation queries the response was YES. [2024-06-21 17:01:06,555 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58873 conditions, 13179 events. 9368/13179 cut-off events. For 83908/83918 co-relation queries the response was YES. Maximal size of possible extension queue 426. Compared 72785 event pairs, 3460 based on Foata normal form. 31/13196 useless extension candidates. Maximal degree in co-relation 58840. Up to 11015 conditions per place. [2024-06-21 17:01:06,612 INFO L140 encePairwiseOnDemand]: 37/51 looper letters, 104 selfloop transitions, 81 changer transitions 0/192 dead transitions. [2024-06-21 17:01:06,612 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 90 places, 192 transitions, 1817 flow [2024-06-21 17:01:06,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 17:01:06,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 17:01:06,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 200 transitions. [2024-06-21 17:01:06,613 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5602240896358543 [2024-06-21 17:01:06,614 INFO L175 Difference]: Start difference. First operand has 84 places, 120 transitions, 935 flow. Second operand 7 states and 200 transitions. [2024-06-21 17:01:06,614 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 90 places, 192 transitions, 1817 flow [2024-06-21 17:01:06,704 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 88 places, 192 transitions, 1723 flow, removed 38 selfloop flow, removed 2 redundant places. [2024-06-21 17:01:06,706 INFO L231 Difference]: Finished difference. Result has 91 places, 141 transitions, 1308 flow [2024-06-21 17:01:06,707 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=865, PETRI_DIFFERENCE_MINUEND_PLACES=82, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=120, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=60, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1308, PETRI_PLACES=91, PETRI_TRANSITIONS=141} [2024-06-21 17:01:06,707 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 37 predicate places. [2024-06-21 17:01:06,707 INFO L495 AbstractCegarLoop]: Abstraction has has 91 places, 141 transitions, 1308 flow [2024-06-21 17:01:06,707 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 14.375) internal successors, (115), 8 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:01:06,708 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:01:06,708 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:01:06,708 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-06-21 17:01:06,708 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 17:01:06,708 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:01:06,708 INFO L85 PathProgramCache]: Analyzing trace with hash -250406590, now seen corresponding path program 3 times [2024-06-21 17:01:06,708 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:01:06,709 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [162806168] [2024-06-21 17:01:06,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:01:06,709 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:01:06,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:01:07,401 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:01:07,401 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:01:07,401 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [162806168] [2024-06-21 17:01:07,401 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [162806168] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:01:07,401 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:01:07,401 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 17:01:07,401 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1011048035] [2024-06-21 17:01:07,401 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:01:07,402 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 17:01:07,402 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:01:07,402 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 17:01:07,402 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-21 17:01:07,496 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 51 [2024-06-21 17:01:07,496 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 91 places, 141 transitions, 1308 flow. Second operand has 8 states, 8 states have (on average 14.375) internal successors, (115), 8 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:01:07,496 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:01:07,496 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 51 [2024-06-21 17:01:07,496 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:01:09,027 INFO L124 PetriNetUnfolderBase]: 9562/13465 cut-off events. [2024-06-21 17:01:09,028 INFO L125 PetriNetUnfolderBase]: For 111335/111353 co-relation queries the response was YES. [2024-06-21 17:01:09,070 INFO L83 FinitePrefix]: Finished finitePrefix Result has 66379 conditions, 13465 events. 9562/13465 cut-off events. For 111335/111353 co-relation queries the response was YES. Maximal size of possible extension queue 431. Compared 74515 event pairs, 3451 based on Foata normal form. 21/13456 useless extension candidates. Maximal degree in co-relation 66342. Up to 11127 conditions per place. [2024-06-21 17:01:09,129 INFO L140 encePairwiseOnDemand]: 37/51 looper letters, 101 selfloop transitions, 108 changer transitions 0/216 dead transitions. [2024-06-21 17:01:09,130 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 97 places, 216 transitions, 2360 flow [2024-06-21 17:01:09,130 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 17:01:09,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 17:01:09,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 199 transitions. [2024-06-21 17:01:09,131 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5574229691876751 [2024-06-21 17:01:09,131 INFO L175 Difference]: Start difference. First operand has 91 places, 141 transitions, 1308 flow. Second operand 7 states and 199 transitions. [2024-06-21 17:01:09,131 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 97 places, 216 transitions, 2360 flow [2024-06-21 17:01:09,259 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 94 places, 216 transitions, 2227 flow, removed 20 selfloop flow, removed 3 redundant places. [2024-06-21 17:01:09,262 INFO L231 Difference]: Finished difference. Result has 97 places, 166 transitions, 1802 flow [2024-06-21 17:01:09,262 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=1193, PETRI_DIFFERENCE_MINUEND_PLACES=88, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=141, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=85, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1802, PETRI_PLACES=97, PETRI_TRANSITIONS=166} [2024-06-21 17:01:09,263 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 43 predicate places. [2024-06-21 17:01:09,263 INFO L495 AbstractCegarLoop]: Abstraction has has 97 places, 166 transitions, 1802 flow [2024-06-21 17:01:09,263 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 14.375) internal successors, (115), 8 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:01:09,263 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:01:09,263 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:01:09,263 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-06-21 17:01:09,264 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 17:01:09,264 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:01:09,264 INFO L85 PathProgramCache]: Analyzing trace with hash 2105524102, now seen corresponding path program 4 times [2024-06-21 17:01:09,264 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:01:09,264 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [774601768] [2024-06-21 17:01:09,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:01:09,264 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:01:09,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:01:09,899 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:01:09,899 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:01:09,899 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [774601768] [2024-06-21 17:01:09,899 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [774601768] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:01:09,899 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:01:09,899 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 17:01:09,899 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [884415620] [2024-06-21 17:01:09,900 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:01:09,900 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 17:01:09,900 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:01:09,900 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 17:01:09,900 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-21 17:01:09,985 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 51 [2024-06-21 17:01:09,985 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 97 places, 166 transitions, 1802 flow. Second operand has 8 states, 8 states have (on average 14.375) internal successors, (115), 8 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:01:09,985 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:01:09,985 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 51 [2024-06-21 17:01:09,986 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:01:11,627 INFO L124 PetriNetUnfolderBase]: 9538/13436 cut-off events. [2024-06-21 17:01:11,627 INFO L125 PetriNetUnfolderBase]: For 139498/139510 co-relation queries the response was YES. [2024-06-21 17:01:11,682 INFO L83 FinitePrefix]: Finished finitePrefix Result has 70798 conditions, 13436 events. 9538/13436 cut-off events. For 139498/139510 co-relation queries the response was YES. Maximal size of possible extension queue 431. Compared 74300 event pairs, 3538 based on Foata normal form. 17/13424 useless extension candidates. Maximal degree in co-relation 70758. Up to 11120 conditions per place. [2024-06-21 17:01:11,745 INFO L140 encePairwiseOnDemand]: 37/51 looper letters, 107 selfloop transitions, 100 changer transitions 0/214 dead transitions. [2024-06-21 17:01:11,745 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 103 places, 214 transitions, 2552 flow [2024-06-21 17:01:11,750 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 17:01:11,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 17:01:11,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 197 transitions. [2024-06-21 17:01:11,751 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5518207282913166 [2024-06-21 17:01:11,751 INFO L175 Difference]: Start difference. First operand has 97 places, 166 transitions, 1802 flow. Second operand 7 states and 197 transitions. [2024-06-21 17:01:11,752 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 103 places, 214 transitions, 2552 flow [2024-06-21 17:01:11,915 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 102 places, 214 transitions, 2458 flow, removed 46 selfloop flow, removed 1 redundant places. [2024-06-21 17:01:11,917 INFO L231 Difference]: Finished difference. Result has 103 places, 166 transitions, 1928 flow [2024-06-21 17:01:11,918 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=1712, PETRI_DIFFERENCE_MINUEND_PLACES=96, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=166, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=100, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1928, PETRI_PLACES=103, PETRI_TRANSITIONS=166} [2024-06-21 17:01:11,918 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 49 predicate places. [2024-06-21 17:01:11,918 INFO L495 AbstractCegarLoop]: Abstraction has has 103 places, 166 transitions, 1928 flow [2024-06-21 17:01:11,918 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 14.375) internal successors, (115), 8 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:01:11,919 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:01:11,919 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:01:11,919 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-06-21 17:01:11,919 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 17:01:11,919 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:01:11,919 INFO L85 PathProgramCache]: Analyzing trace with hash 2105770180, now seen corresponding path program 1 times [2024-06-21 17:01:11,919 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:01:11,919 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [132806302] [2024-06-21 17:01:11,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:01:11,920 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:01:11,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:01:12,641 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 17:01:12,641 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:01:12,641 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [132806302] [2024-06-21 17:01:12,641 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [132806302] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:01:12,641 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:01:12,641 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 17:01:12,642 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [80354807] [2024-06-21 17:01:12,642 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:01:12,642 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 17:01:12,642 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:01:12,642 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 17:01:12,642 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-21 17:01:12,749 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 51 [2024-06-21 17:01:12,749 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 103 places, 166 transitions, 1928 flow. Second operand has 8 states, 8 states have (on average 15.375) internal successors, (123), 8 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:01:12,749 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:01:12,750 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 51 [2024-06-21 17:01:12,750 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:01:14,329 INFO L124 PetriNetUnfolderBase]: 8534/12463 cut-off events. [2024-06-21 17:01:14,329 INFO L125 PetriNetUnfolderBase]: For 127378/127380 co-relation queries the response was YES. [2024-06-21 17:01:14,380 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64929 conditions, 12463 events. 8534/12463 cut-off events. For 127378/127380 co-relation queries the response was YES. Maximal size of possible extension queue 417. Compared 72295 event pairs, 3099 based on Foata normal form. 26/12479 useless extension candidates. Maximal degree in co-relation 64886. Up to 11286 conditions per place. [2024-06-21 17:01:14,437 INFO L140 encePairwiseOnDemand]: 39/51 looper letters, 179 selfloop transitions, 25 changer transitions 0/212 dead transitions. [2024-06-21 17:01:14,437 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 109 places, 212 transitions, 2602 flow [2024-06-21 17:01:14,437 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 17:01:14,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 17:01:14,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 195 transitions. [2024-06-21 17:01:14,438 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5462184873949579 [2024-06-21 17:01:14,438 INFO L175 Difference]: Start difference. First operand has 103 places, 166 transitions, 1928 flow. Second operand 7 states and 195 transitions. [2024-06-21 17:01:14,439 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 109 places, 212 transitions, 2602 flow [2024-06-21 17:01:14,586 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 103 places, 212 transitions, 2371 flow, removed 8 selfloop flow, removed 6 redundant places. [2024-06-21 17:01:14,589 INFO L231 Difference]: Finished difference. Result has 104 places, 169 transitions, 1804 flow [2024-06-21 17:01:14,589 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=1697, PETRI_DIFFERENCE_MINUEND_PLACES=97, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=166, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=141, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1804, PETRI_PLACES=104, PETRI_TRANSITIONS=169} [2024-06-21 17:01:14,589 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 50 predicate places. [2024-06-21 17:01:14,590 INFO L495 AbstractCegarLoop]: Abstraction has has 104 places, 169 transitions, 1804 flow [2024-06-21 17:01:14,590 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.375) internal successors, (123), 8 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:01:14,590 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:01:14,590 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:01:14,590 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-06-21 17:01:14,590 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 17:01:14,591 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:01:14,591 INFO L85 PathProgramCache]: Analyzing trace with hash 1721707586, now seen corresponding path program 1 times [2024-06-21 17:01:14,591 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:01:14,591 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1644894632] [2024-06-21 17:01:14,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:01:14,591 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:01:14,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:01:15,036 INFO 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 17:01:15,036 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:01:15,036 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1644894632] [2024-06-21 17:01:15,036 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1644894632] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:01:15,037 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:01:15,037 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 17:01:15,037 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1061110259] [2024-06-21 17:01:15,037 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:01:15,037 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 17:01:15,037 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:01:15,037 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 17:01:15,037 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-06-21 17:01:15,103 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 51 [2024-06-21 17:01:15,104 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 104 places, 169 transitions, 1804 flow. Second operand has 6 states, 6 states have (on average 16.0) internal successors, (96), 6 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:01:15,104 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:01:15,104 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 51 [2024-06-21 17:01:15,104 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:01:16,612 INFO L124 PetriNetUnfolderBase]: 8520/12447 cut-off events. [2024-06-21 17:01:16,612 INFO L125 PetriNetUnfolderBase]: For 131390/131392 co-relation queries the response was YES. [2024-06-21 17:01:16,657 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64927 conditions, 12447 events. 8520/12447 cut-off events. For 131390/131392 co-relation queries the response was YES. Maximal size of possible extension queue 416. Compared 72117 event pairs, 3221 based on Foata normal form. 4/12449 useless extension candidates. Maximal degree in co-relation 64884. Up to 11577 conditions per place. [2024-06-21 17:01:16,722 INFO L140 encePairwiseOnDemand]: 42/51 looper letters, 166 selfloop transitions, 10 changer transitions 0/184 dead transitions. [2024-06-21 17:01:16,723 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 108 places, 184 transitions, 2202 flow [2024-06-21 17:01:16,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-21 17:01:16,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-21 17:01:16,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 127 transitions. [2024-06-21 17:01:16,724 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4980392156862745 [2024-06-21 17:01:16,724 INFO L175 Difference]: Start difference. First operand has 104 places, 169 transitions, 1804 flow. Second operand 5 states and 127 transitions. [2024-06-21 17:01:16,724 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 108 places, 184 transitions, 2202 flow [2024-06-21 17:01:16,870 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 103 places, 184 transitions, 2119 flow, removed 19 selfloop flow, removed 5 redundant places. [2024-06-21 17:01:16,873 INFO L231 Difference]: Finished difference. Result has 104 places, 169 transitions, 1750 flow [2024-06-21 17:01:16,873 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=1721, PETRI_DIFFERENCE_MINUEND_PLACES=99, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=169, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=159, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1750, PETRI_PLACES=104, PETRI_TRANSITIONS=169} [2024-06-21 17:01:16,873 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 50 predicate places. [2024-06-21 17:01:16,874 INFO L495 AbstractCegarLoop]: Abstraction has has 104 places, 169 transitions, 1750 flow [2024-06-21 17:01:16,874 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.0) internal successors, (96), 6 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:01:16,874 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:01:16,874 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:01:16,874 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-06-21 17:01:16,874 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 17:01:16,874 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:01:16,875 INFO L85 PathProgramCache]: Analyzing trace with hash -1955356944, now seen corresponding path program 1 times [2024-06-21 17:01:16,875 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:01:16,875 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [846062607] [2024-06-21 17:01:16,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:01:16,875 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:01:16,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:01:17,521 INFO 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 17:01:17,522 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:01:17,522 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [846062607] [2024-06-21 17:01:17,522 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [846062607] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:01:17,522 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:01:17,522 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 17:01:17,522 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1575817032] [2024-06-21 17:01:17,522 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:01:17,523 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 17:01:17,523 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:01:17,523 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 17:01:17,523 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-21 17:01:17,599 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 51 [2024-06-21 17:01:17,599 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 104 places, 169 transitions, 1750 flow. Second operand has 8 states, 8 states have (on average 14.5) internal successors, (116), 8 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:01:17,599 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:01:17,599 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 51 [2024-06-21 17:01:17,600 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:01:19,350 INFO L124 PetriNetUnfolderBase]: 9798/13856 cut-off events. [2024-06-21 17:01:19,350 INFO L125 PetriNetUnfolderBase]: For 166205/166221 co-relation queries the response was YES. [2024-06-21 17:01:19,393 INFO L83 FinitePrefix]: Finished finitePrefix Result has 73332 conditions, 13856 events. 9798/13856 cut-off events. For 166205/166221 co-relation queries the response was YES. Maximal size of possible extension queue 451. Compared 77439 event pairs, 3598 based on Foata normal form. 27/13872 useless extension candidates. Maximal degree in co-relation 73288. Up to 11444 conditions per place. [2024-06-21 17:01:19,452 INFO L140 encePairwiseOnDemand]: 37/51 looper letters, 118 selfloop transitions, 112 changer transitions 0/237 dead transitions. [2024-06-21 17:01:19,453 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 110 places, 237 transitions, 2804 flow [2024-06-21 17:01:19,453 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 17:01:19,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 17:01:19,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 202 transitions. [2024-06-21 17:01:19,454 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5658263305322129 [2024-06-21 17:01:19,454 INFO L175 Difference]: Start difference. First operand has 104 places, 169 transitions, 1750 flow. Second operand 7 states and 202 transitions. [2024-06-21 17:01:19,454 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 110 places, 237 transitions, 2804 flow [2024-06-21 17:01:19,590 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 106 places, 237 transitions, 2771 flow, removed 5 selfloop flow, removed 4 redundant places. [2024-06-21 17:01:19,593 INFO L231 Difference]: Finished difference. Result has 108 places, 185 transitions, 2213 flow [2024-06-21 17:01:19,593 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=1717, PETRI_DIFFERENCE_MINUEND_PLACES=100, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=169, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=96, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2213, PETRI_PLACES=108, PETRI_TRANSITIONS=185} [2024-06-21 17:01:19,593 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 54 predicate places. [2024-06-21 17:01:19,593 INFO L495 AbstractCegarLoop]: Abstraction has has 108 places, 185 transitions, 2213 flow [2024-06-21 17:01:19,594 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 14.5) internal successors, (116), 8 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:01:19,594 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:01:19,594 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:01:19,594 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-06-21 17:01:19,594 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 17:01:19,594 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:01:19,594 INFO L85 PathProgramCache]: Analyzing trace with hash -349371384, now seen corresponding path program 2 times [2024-06-21 17:01:19,595 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:01:19,595 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1612027096] [2024-06-21 17:01:19,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:01:19,595 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:01:19,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:01:20,272 INFO 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 17:01:20,273 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:01:20,273 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1612027096] [2024-06-21 17:01:20,273 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1612027096] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:01:20,273 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:01:20,273 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 17:01:20,273 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1233190695] [2024-06-21 17:01:20,273 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:01:20,273 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 17:01:20,274 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:01:20,274 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 17:01:20,274 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-21 17:01:20,369 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 51 [2024-06-21 17:01:20,369 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 108 places, 185 transitions, 2213 flow. Second operand has 8 states, 8 states have (on average 14.5) internal successors, (116), 8 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:01:20,369 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:01:20,369 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 51 [2024-06-21 17:01:20,369 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:01:21,971 INFO L124 PetriNetUnfolderBase]: 9920/14066 cut-off events. [2024-06-21 17:01:21,971 INFO L125 PetriNetUnfolderBase]: For 197033/197063 co-relation queries the response was YES. [2024-06-21 17:01:22,056 INFO L83 FinitePrefix]: Finished finitePrefix Result has 78866 conditions, 14066 events. 9920/14066 cut-off events. For 197033/197063 co-relation queries the response was YES. Maximal size of possible extension queue 462. Compared 79251 event pairs, 3524 based on Foata normal form. 39/14094 useless extension candidates. Maximal degree in co-relation 78821. Up to 11556 conditions per place. [2024-06-21 17:01:22,129 INFO L140 encePairwiseOnDemand]: 38/51 looper letters, 117 selfloop transitions, 117 changer transitions 0/241 dead transitions. [2024-06-21 17:01:22,129 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 114 places, 241 transitions, 3139 flow [2024-06-21 17:01:22,130 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 17:01:22,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 17:01:22,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 196 transitions. [2024-06-21 17:01:22,131 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5490196078431373 [2024-06-21 17:01:22,131 INFO L175 Difference]: Start difference. First operand has 108 places, 185 transitions, 2213 flow. Second operand 7 states and 196 transitions. [2024-06-21 17:01:22,131 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 114 places, 241 transitions, 3139 flow [2024-06-21 17:01:22,412 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 111 places, 241 transitions, 2982 flow, removed 22 selfloop flow, removed 3 redundant places. [2024-06-21 17:01:22,415 INFO L231 Difference]: Finished difference. Result has 112 places, 194 transitions, 2450 flow [2024-06-21 17:01:22,415 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=2064, PETRI_DIFFERENCE_MINUEND_PLACES=105, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=185, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=108, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=76, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2450, PETRI_PLACES=112, PETRI_TRANSITIONS=194} [2024-06-21 17:01:22,415 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 58 predicate places. [2024-06-21 17:01:22,416 INFO L495 AbstractCegarLoop]: Abstraction has has 112 places, 194 transitions, 2450 flow [2024-06-21 17:01:22,416 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 14.5) internal successors, (116), 8 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:01:22,416 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:01:22,416 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:01:22,416 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-06-21 17:01:22,416 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 17:01:22,417 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:01:22,417 INFO L85 PathProgramCache]: Analyzing trace with hash 827331020, now seen corresponding path program 3 times [2024-06-21 17:01:22,417 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:01:22,417 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [476391093] [2024-06-21 17:01:22,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:01:22,417 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:01:22,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:01:23,046 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:01:23,046 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:01:23,047 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [476391093] [2024-06-21 17:01:23,047 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [476391093] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:01:23,047 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:01:23,047 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 17:01:23,047 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1149913151] [2024-06-21 17:01:23,047 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:01:23,047 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 17:01:23,047 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:01:23,047 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 17:01:23,047 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-21 17:01:23,139 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 51 [2024-06-21 17:01:23,140 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 112 places, 194 transitions, 2450 flow. Second operand has 8 states, 8 states have (on average 14.5) internal successors, (116), 8 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:01:23,140 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:01:23,140 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 51 [2024-06-21 17:01:23,140 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:01:24,800 INFO L124 PetriNetUnfolderBase]: 9966/14121 cut-off events. [2024-06-21 17:01:24,800 INFO L125 PetriNetUnfolderBase]: For 223038/223134 co-relation queries the response was YES. [2024-06-21 17:01:24,862 INFO L83 FinitePrefix]: Finished finitePrefix Result has 80933 conditions, 14121 events. 9966/14121 cut-off events. For 223038/223134 co-relation queries the response was YES. Maximal size of possible extension queue 471. Compared 79545 event pairs, 3520 based on Foata normal form. 71/14131 useless extension candidates. Maximal degree in co-relation 80887. Up to 11604 conditions per place. [2024-06-21 17:01:24,930 INFO L140 encePairwiseOnDemand]: 38/51 looper letters, 113 selfloop transitions, 124 changer transitions 0/244 dead transitions. [2024-06-21 17:01:24,930 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 118 places, 244 transitions, 3276 flow [2024-06-21 17:01:24,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 17:01:24,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 17:01:24,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 190 transitions. [2024-06-21 17:01:24,932 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5322128851540616 [2024-06-21 17:01:24,932 INFO L175 Difference]: Start difference. First operand has 112 places, 194 transitions, 2450 flow. Second operand 7 states and 190 transitions. [2024-06-21 17:01:24,932 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 118 places, 244 transitions, 3276 flow [2024-06-21 17:01:25,309 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 114 places, 244 transitions, 3070 flow, removed 22 selfloop flow, removed 4 redundant places. [2024-06-21 17:01:25,312 INFO L231 Difference]: Finished difference. Result has 115 places, 203 transitions, 2660 flow [2024-06-21 17:01:25,312 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=2252, PETRI_DIFFERENCE_MINUEND_PLACES=108, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=194, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=115, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=78, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2660, PETRI_PLACES=115, PETRI_TRANSITIONS=203} [2024-06-21 17:01:25,312 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 61 predicate places. [2024-06-21 17:01:25,313 INFO L495 AbstractCegarLoop]: Abstraction has has 115 places, 203 transitions, 2660 flow [2024-06-21 17:01:25,313 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 14.5) internal successors, (116), 8 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:01:25,313 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:01:25,313 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:01:25,313 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-06-21 17:01:25,313 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 17:01:25,314 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:01:25,314 INFO L85 PathProgramCache]: Analyzing trace with hash 37077409, now seen corresponding path program 1 times [2024-06-21 17:01:25,314 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:01:25,314 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [714894031] [2024-06-21 17:01:25,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:01:25,314 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:01:25,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:01:25,962 INFO 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 17:01:25,963 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:01:25,963 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [714894031] [2024-06-21 17:01:25,963 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [714894031] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:01:25,963 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:01:25,963 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 17:01:25,963 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1062811519] [2024-06-21 17:01:25,963 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:01:25,963 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 17:01:25,963 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:01:25,964 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 17:01:25,964 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-21 17:01:26,074 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 51 [2024-06-21 17:01:26,075 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 115 places, 203 transitions, 2660 flow. Second operand has 8 states, 8 states have (on average 14.5) internal successors, (116), 8 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:01:26,075 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:01:26,075 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 51 [2024-06-21 17:01:26,075 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:01:27,677 INFO L124 PetriNetUnfolderBase]: 10002/14184 cut-off events. [2024-06-21 17:01:27,677 INFO L125 PetriNetUnfolderBase]: For 245705/245741 co-relation queries the response was YES. [2024-06-21 17:01:27,735 INFO L83 FinitePrefix]: Finished finitePrefix Result has 82706 conditions, 14184 events. 10002/14184 cut-off events. For 245705/245741 co-relation queries the response was YES. Maximal size of possible extension queue 471. Compared 80102 event pairs, 2882 based on Foata normal form. 38/14219 useless extension candidates. Maximal degree in co-relation 82659. Up to 13166 conditions per place. [2024-06-21 17:01:27,803 INFO L140 encePairwiseOnDemand]: 40/51 looper letters, 201 selfloop transitions, 41 changer transitions 0/249 dead transitions. [2024-06-21 17:01:27,804 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 121 places, 249 transitions, 3482 flow [2024-06-21 17:01:27,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 17:01:27,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 17:01:27,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 184 transitions. [2024-06-21 17:01:27,821 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5154061624649859 [2024-06-21 17:01:27,821 INFO L175 Difference]: Start difference. First operand has 115 places, 203 transitions, 2660 flow. Second operand 7 states and 184 transitions. [2024-06-21 17:01:27,821 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 121 places, 249 transitions, 3482 flow [2024-06-21 17:01:28,174 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 117 places, 249 transitions, 3270 flow, removed 22 selfloop flow, removed 4 redundant places. [2024-06-21 17:01:28,177 INFO L231 Difference]: Finished difference. Result has 118 places, 209 transitions, 2658 flow [2024-06-21 17:01:28,177 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=2448, PETRI_DIFFERENCE_MINUEND_PLACES=111, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=203, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=165, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2658, PETRI_PLACES=118, PETRI_TRANSITIONS=209} [2024-06-21 17:01:28,177 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 64 predicate places. [2024-06-21 17:01:28,178 INFO L495 AbstractCegarLoop]: Abstraction has has 118 places, 209 transitions, 2658 flow [2024-06-21 17:01:28,178 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 14.5) internal successors, (116), 8 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:01:28,178 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:01:28,178 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:01:28,178 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-06-21 17:01:28,178 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 17:01:28,178 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:01:28,178 INFO L85 PathProgramCache]: Analyzing trace with hash 1938920809, now seen corresponding path program 2 times [2024-06-21 17:01:28,179 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:01:28,179 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1425836431] [2024-06-21 17:01:28,179 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:01:28,179 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:01:28,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:01:28,882 INFO 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 17:01:28,883 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:01:28,883 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1425836431] [2024-06-21 17:01:28,883 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1425836431] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:01:28,883 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:01:28,883 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 17:01:28,883 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1351371156] [2024-06-21 17:01:28,883 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:01:28,884 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 17:01:28,885 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:01:28,886 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 17:01:28,886 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-21 17:01:28,984 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 51 [2024-06-21 17:01:28,984 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 118 places, 209 transitions, 2658 flow. Second operand has 8 states, 8 states have (on average 14.5) internal successors, (116), 8 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:01:28,984 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:01:28,984 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 51 [2024-06-21 17:01:28,985 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:01:30,652 INFO L124 PetriNetUnfolderBase]: 9987/14142 cut-off events. [2024-06-21 17:01:30,652 INFO L125 PetriNetUnfolderBase]: For 267841/267861 co-relation queries the response was YES. [2024-06-21 17:01:30,725 INFO L83 FinitePrefix]: Finished finitePrefix Result has 82983 conditions, 14142 events. 9987/14142 cut-off events. For 267841/267861 co-relation queries the response was YES. Maximal size of possible extension queue 468. Compared 79330 event pairs, 3463 based on Foata normal form. 22/14157 useless extension candidates. Maximal degree in co-relation 82934. Up to 13281 conditions per place. [2024-06-21 17:01:30,797 INFO L140 encePairwiseOnDemand]: 39/51 looper letters, 200 selfloop transitions, 40 changer transitions 0/247 dead transitions. [2024-06-21 17:01:30,798 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 124 places, 247 transitions, 3268 flow [2024-06-21 17:01:30,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 17:01:30,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 17:01:30,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 181 transitions. [2024-06-21 17:01:30,807 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5070028011204482 [2024-06-21 17:01:30,807 INFO L175 Difference]: Start difference. First operand has 118 places, 209 transitions, 2658 flow. Second operand 7 states and 181 transitions. [2024-06-21 17:01:30,807 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 124 places, 247 transitions, 3268 flow [2024-06-21 17:01:31,290 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 121 places, 247 transitions, 3140 flow, removed 47 selfloop flow, removed 3 redundant places. [2024-06-21 17:01:31,293 INFO L231 Difference]: Finished difference. Result has 122 places, 209 transitions, 2622 flow [2024-06-21 17:01:31,294 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=2530, PETRI_DIFFERENCE_MINUEND_PLACES=115, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=209, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=169, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2622, PETRI_PLACES=122, PETRI_TRANSITIONS=209} [2024-06-21 17:01:31,294 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 68 predicate places. [2024-06-21 17:01:31,294 INFO L495 AbstractCegarLoop]: Abstraction has has 122 places, 209 transitions, 2622 flow [2024-06-21 17:01:31,294 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 14.5) internal successors, (116), 8 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:01:31,294 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:01:31,295 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:01:31,295 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-06-21 17:01:31,295 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 17:01:31,295 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:01:31,295 INFO L85 PathProgramCache]: Analyzing trace with hash -518870003, now seen corresponding path program 1 times [2024-06-21 17:01:31,295 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:01:31,295 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2139755952] [2024-06-21 17:01:31,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:01:31,296 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:01:31,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:01:31,926 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:01:31,927 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:01:31,927 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2139755952] [2024-06-21 17:01:31,927 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2139755952] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:01:31,927 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:01:31,927 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:01:31,927 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1341147612] [2024-06-21 17:01:31,927 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:01:31,927 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:01:31,928 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:01:31,928 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:01:31,928 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:01:31,993 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 51 [2024-06-21 17:01:31,994 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 122 places, 209 transitions, 2622 flow. Second operand has 9 states, 9 states have (on average 14.333333333333334) internal successors, (129), 9 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:01:31,994 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:01:31,994 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 51 [2024-06-21 17:01:31,994 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:01:33,953 INFO L124 PetriNetUnfolderBase]: 10795/15405 cut-off events. [2024-06-21 17:01:33,954 INFO L125 PetriNetUnfolderBase]: For 319850/319864 co-relation queries the response was YES. [2024-06-21 17:01:34,015 INFO L83 FinitePrefix]: Finished finitePrefix Result has 89337 conditions, 15405 events. 10795/15405 cut-off events. For 319850/319864 co-relation queries the response was YES. Maximal size of possible extension queue 535. Compared 89222 event pairs, 3407 based on Foata normal form. 127/15521 useless extension candidates. Maximal degree in co-relation 89286. Up to 11689 conditions per place. [2024-06-21 17:01:34,085 INFO L140 encePairwiseOnDemand]: 37/51 looper letters, 134 selfloop transitions, 132 changer transitions 0/273 dead transitions. [2024-06-21 17:01:34,085 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 129 places, 273 transitions, 3638 flow [2024-06-21 17:01:34,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 17:01:34,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 17:01:34,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 229 transitions. [2024-06-21 17:01:34,087 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5612745098039216 [2024-06-21 17:01:34,087 INFO L175 Difference]: Start difference. First operand has 122 places, 209 transitions, 2622 flow. Second operand 8 states and 229 transitions. [2024-06-21 17:01:34,087 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 129 places, 273 transitions, 3638 flow [2024-06-21 17:01:34,451 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 123 places, 273 transitions, 3546 flow, removed 3 selfloop flow, removed 6 redundant places. [2024-06-21 17:01:34,454 INFO L231 Difference]: Finished difference. Result has 124 places, 212 transitions, 2878 flow [2024-06-21 17:01:34,455 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=2530, PETRI_DIFFERENCE_MINUEND_PLACES=116, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=209, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=129, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=77, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2878, PETRI_PLACES=124, PETRI_TRANSITIONS=212} [2024-06-21 17:01:34,455 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 70 predicate places. [2024-06-21 17:01:34,455 INFO L495 AbstractCegarLoop]: Abstraction has has 124 places, 212 transitions, 2878 flow [2024-06-21 17:01:34,455 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 14.333333333333334) internal successors, (129), 9 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:01:34,455 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:01:34,455 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:01:34,455 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-06-21 17:01:34,456 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 17:01:34,456 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:01:34,456 INFO L85 PathProgramCache]: Analyzing trace with hash 605115235, now seen corresponding path program 1 times [2024-06-21 17:01:34,456 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:01:34,456 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1917180314] [2024-06-21 17:01:34,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:01:34,457 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:01:34,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:01:35,057 INFO 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 17:01:35,057 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:01:35,057 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1917180314] [2024-06-21 17:01:35,057 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1917180314] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:01:35,057 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:01:35,057 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 17:01:35,057 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1607586173] [2024-06-21 17:01:35,058 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:01:35,058 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 17:01:35,058 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:01:35,059 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 17:01:35,059 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-21 17:01:35,115 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 51 [2024-06-21 17:01:35,115 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 124 places, 212 transitions, 2878 flow. Second operand has 7 states, 7 states have (on average 14.857142857142858) internal successors, (104), 7 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 17:01:35,115 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:01:35,115 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 51 [2024-06-21 17:01:35,116 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:01:36,966 INFO L124 PetriNetUnfolderBase]: 10841/15405 cut-off events. [2024-06-21 17:01:36,967 INFO L125 PetriNetUnfolderBase]: For 334093/334103 co-relation queries the response was YES. [2024-06-21 17:01:37,038 INFO L83 FinitePrefix]: Finished finitePrefix Result has 94030 conditions, 15405 events. 10841/15405 cut-off events. For 334093/334103 co-relation queries the response was YES. Maximal size of possible extension queue 531. Compared 88184 event pairs, 3692 based on Foata normal form. 18/15418 useless extension candidates. Maximal degree in co-relation 93978. Up to 14681 conditions per place. [2024-06-21 17:01:37,113 INFO L140 encePairwiseOnDemand]: 41/51 looper letters, 215 selfloop transitions, 29 changer transitions 0/251 dead transitions. [2024-06-21 17:01:37,113 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 129 places, 251 transitions, 3687 flow [2024-06-21 17:01:37,114 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 17:01:37,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 17:01:37,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 156 transitions. [2024-06-21 17:01:37,114 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5098039215686274 [2024-06-21 17:01:37,114 INFO L175 Difference]: Start difference. First operand has 124 places, 212 transitions, 2878 flow. Second operand 6 states and 156 transitions. [2024-06-21 17:01:37,115 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 129 places, 251 transitions, 3687 flow [2024-06-21 17:01:37,704 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 123 places, 251 transitions, 3377 flow, removed 23 selfloop flow, removed 6 redundant places. [2024-06-21 17:01:37,707 INFO L231 Difference]: Finished difference. Result has 124 places, 219 transitions, 2773 flow [2024-06-21 17:01:37,707 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=2580, PETRI_DIFFERENCE_MINUEND_PLACES=118, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=212, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=190, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2773, PETRI_PLACES=124, PETRI_TRANSITIONS=219} [2024-06-21 17:01:37,707 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 70 predicate places. [2024-06-21 17:01:37,708 INFO L495 AbstractCegarLoop]: Abstraction has has 124 places, 219 transitions, 2773 flow [2024-06-21 17:01:37,708 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 14.857142857142858) internal successors, (104), 7 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 17:01:37,708 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:01:37,708 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:01:37,708 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-06-21 17:01:37,708 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 17:01:37,708 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:01:37,709 INFO L85 PathProgramCache]: Analyzing trace with hash -1869705783, now seen corresponding path program 2 times [2024-06-21 17:01:37,709 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:01:37,709 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1713596636] [2024-06-21 17:01:37,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:01:37,709 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:01:37,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:01:38,464 INFO 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 17:01:38,464 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:01:38,464 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1713596636] [2024-06-21 17:01:38,464 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1713596636] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:01:38,464 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:01:38,464 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:01:38,464 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1766659325] [2024-06-21 17:01:38,464 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:01:38,465 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:01:38,465 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:01:38,465 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:01:38,465 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:01:38,539 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 51 [2024-06-21 17:01:38,539 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 124 places, 219 transitions, 2773 flow. Second operand has 9 states, 9 states have (on average 14.333333333333334) internal successors, (129), 9 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:01:38,539 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:01:38,539 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 51 [2024-06-21 17:01:38,539 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:01:40,579 INFO L124 PetriNetUnfolderBase]: 11038/15730 cut-off events. [2024-06-21 17:01:40,579 INFO L125 PetriNetUnfolderBase]: For 347023/347045 co-relation queries the response was YES. [2024-06-21 17:01:40,657 INFO L83 FinitePrefix]: Finished finitePrefix Result has 92949 conditions, 15730 events. 11038/15730 cut-off events. For 347023/347045 co-relation queries the response was YES. Maximal size of possible extension queue 552. Compared 90911 event pairs, 3440 based on Foata normal form. 38/15728 useless extension candidates. Maximal degree in co-relation 92896. Up to 12932 conditions per place. [2024-06-21 17:01:40,733 INFO L140 encePairwiseOnDemand]: 37/51 looper letters, 124 selfloop transitions, 147 changer transitions 0/278 dead transitions. [2024-06-21 17:01:40,734 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 131 places, 278 transitions, 3735 flow [2024-06-21 17:01:40,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 17:01:40,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 17:01:40,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 223 transitions. [2024-06-21 17:01:40,735 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5465686274509803 [2024-06-21 17:01:40,735 INFO L175 Difference]: Start difference. First operand has 124 places, 219 transitions, 2773 flow. Second operand 8 states and 223 transitions. [2024-06-21 17:01:40,735 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 131 places, 278 transitions, 3735 flow [2024-06-21 17:01:41,269 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 125 places, 278 transitions, 3407 flow, removed 26 selfloop flow, removed 6 redundant places. [2024-06-21 17:01:41,272 INFO L231 Difference]: Finished difference. Result has 126 places, 222 transitions, 2824 flow [2024-06-21 17:01:41,272 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=2445, PETRI_DIFFERENCE_MINUEND_PLACES=118, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=219, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=144, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=72, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2824, PETRI_PLACES=126, PETRI_TRANSITIONS=222} [2024-06-21 17:01:41,272 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 72 predicate places. [2024-06-21 17:01:41,273 INFO L495 AbstractCegarLoop]: Abstraction has has 126 places, 222 transitions, 2824 flow [2024-06-21 17:01:41,273 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 14.333333333333334) internal successors, (129), 9 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:01:41,273 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:01:41,273 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:01:41,273 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-06-21 17:01:41,273 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 17:01:41,273 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:01:41,274 INFO L85 PathProgramCache]: Analyzing trace with hash 479095557, now seen corresponding path program 3 times [2024-06-21 17:01:41,274 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:01:41,274 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1343008821] [2024-06-21 17:01:41,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:01:41,274 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:01:41,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:01:41,982 INFO 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 17:01:41,983 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:01:41,983 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1343008821] [2024-06-21 17:01:41,983 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1343008821] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:01:41,983 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:01:41,983 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:01:41,983 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1815276053] [2024-06-21 17:01:41,983 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:01:41,984 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:01:41,984 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:01:41,984 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:01:41,984 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:01:42,069 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 51 [2024-06-21 17:01:42,069 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 126 places, 222 transitions, 2824 flow. Second operand has 9 states, 9 states have (on average 14.333333333333334) internal successors, (129), 9 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:01:42,069 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:01:42,069 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 51 [2024-06-21 17:01:42,070 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:01:44,120 INFO L124 PetriNetUnfolderBase]: 11235/16010 cut-off events. [2024-06-21 17:01:44,120 INFO L125 PetriNetUnfolderBase]: For 374034/374050 co-relation queries the response was YES. [2024-06-21 17:01:44,187 INFO L83 FinitePrefix]: Finished finitePrefix Result has 98207 conditions, 16010 events. 11235/16010 cut-off events. For 374034/374050 co-relation queries the response was YES. Maximal size of possible extension queue 568. Compared 92747 event pairs, 3539 based on Foata normal form. 30/15999 useless extension candidates. Maximal degree in co-relation 98154. Up to 13203 conditions per place. [2024-06-21 17:01:44,264 INFO L140 encePairwiseOnDemand]: 37/51 looper letters, 136 selfloop transitions, 139 changer transitions 0/282 dead transitions. [2024-06-21 17:01:44,264 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 133 places, 282 transitions, 3896 flow [2024-06-21 17:01:44,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 17:01:44,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 17:01:44,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 224 transitions. [2024-06-21 17:01:44,272 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5490196078431373 [2024-06-21 17:01:44,272 INFO L175 Difference]: Start difference. First operand has 126 places, 222 transitions, 2824 flow. Second operand 8 states and 224 transitions. [2024-06-21 17:01:44,272 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 133 places, 282 transitions, 3896 flow [2024-06-21 17:01:44,841 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 127 places, 282 transitions, 3553 flow, removed 28 selfloop flow, removed 6 redundant places. [2024-06-21 17:01:44,844 INFO L231 Difference]: Finished difference. Result has 128 places, 225 transitions, 2850 flow [2024-06-21 17:01:44,845 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=2481, PETRI_DIFFERENCE_MINUEND_PLACES=120, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=222, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=136, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=83, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2850, PETRI_PLACES=128, PETRI_TRANSITIONS=225} [2024-06-21 17:01:44,845 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 74 predicate places. [2024-06-21 17:01:44,845 INFO L495 AbstractCegarLoop]: Abstraction has has 128 places, 225 transitions, 2850 flow [2024-06-21 17:01:44,846 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 14.333333333333334) internal successors, (129), 9 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:01:44,846 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:01:44,846 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:01:44,846 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-06-21 17:01:44,847 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 17:01:44,847 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:01:44,847 INFO L85 PathProgramCache]: Analyzing trace with hash 715567587, now seen corresponding path program 4 times [2024-06-21 17:01:44,847 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:01:44,847 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1449979187] [2024-06-21 17:01:44,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:01:44,847 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:01:44,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:01:45,605 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:01:45,605 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:01:45,605 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1449979187] [2024-06-21 17:01:45,605 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1449979187] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:01:45,606 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:01:45,606 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:01:45,606 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [271420776] [2024-06-21 17:01:45,606 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:01:45,606 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:01:45,606 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:01:45,607 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:01:45,607 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:01:45,706 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 51 [2024-06-21 17:01:45,706 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 128 places, 225 transitions, 2850 flow. Second operand has 9 states, 9 states have (on average 14.333333333333334) internal successors, (129), 9 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:01:45,706 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:01:45,706 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 51 [2024-06-21 17:01:45,706 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:01:47,667 INFO L124 PetriNetUnfolderBase]: 11381/16226 cut-off events. [2024-06-21 17:01:47,667 INFO L125 PetriNetUnfolderBase]: For 404435/404459 co-relation queries the response was YES. [2024-06-21 17:01:47,762 INFO L83 FinitePrefix]: Finished finitePrefix Result has 100586 conditions, 16226 events. 11381/16226 cut-off events. For 404435/404459 co-relation queries the response was YES. Maximal size of possible extension queue 588. Compared 94313 event pairs, 3142 based on Foata normal form. 38/16223 useless extension candidates. Maximal degree in co-relation 100532. Up to 11653 conditions per place. [2024-06-21 17:01:47,842 INFO L140 encePairwiseOnDemand]: 37/51 looper letters, 124 selfloop transitions, 158 changer transitions 0/289 dead transitions. [2024-06-21 17:01:47,842 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 135 places, 289 transitions, 3878 flow [2024-06-21 17:01:47,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 17:01:47,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 17:01:47,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 228 transitions. [2024-06-21 17:01:47,843 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5588235294117647 [2024-06-21 17:01:47,843 INFO L175 Difference]: Start difference. First operand has 128 places, 225 transitions, 2850 flow. Second operand 8 states and 228 transitions. [2024-06-21 17:01:47,843 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 135 places, 289 transitions, 3878 flow [2024-06-21 17:01:48,435 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 129 places, 289 transitions, 3545 flow, removed 31 selfloop flow, removed 6 redundant places. [2024-06-21 17:01:48,439 INFO L231 Difference]: Finished difference. Result has 130 places, 228 transitions, 2927 flow [2024-06-21 17:01:48,439 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=2517, PETRI_DIFFERENCE_MINUEND_PLACES=122, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=225, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=155, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2927, PETRI_PLACES=130, PETRI_TRANSITIONS=228} [2024-06-21 17:01:48,439 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 76 predicate places. [2024-06-21 17:01:48,439 INFO L495 AbstractCegarLoop]: Abstraction has has 130 places, 228 transitions, 2927 flow [2024-06-21 17:01:48,439 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 14.333333333333334) internal successors, (129), 9 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:01:48,440 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:01:48,440 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:01:48,440 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-06-21 17:01:48,440 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 17:01:48,440 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:01:48,440 INFO L85 PathProgramCache]: Analyzing trace with hash 998630049, now seen corresponding path program 2 times [2024-06-21 17:01:48,440 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:01:48,440 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [345917132] [2024-06-21 17:01:48,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:01:48,441 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:01:48,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:01:48,985 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:01:48,985 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:01:48,985 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [345917132] [2024-06-21 17:01:48,985 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [345917132] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:01:48,985 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:01:48,985 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 17:01:48,986 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1189233230] [2024-06-21 17:01:48,986 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:01:48,986 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 17:01:48,986 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:01:48,986 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 17:01:48,986 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-21 17:01:49,063 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 51 [2024-06-21 17:01:49,064 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 130 places, 228 transitions, 2927 flow. Second operand has 7 states, 7 states have (on average 14.857142857142858) internal successors, (104), 7 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 17:01:49,064 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:01:49,064 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 51 [2024-06-21 17:01:49,064 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:01:51,063 INFO L124 PetriNetUnfolderBase]: 11359/16208 cut-off events. [2024-06-21 17:01:51,063 INFO L125 PetriNetUnfolderBase]: For 421316/421344 co-relation queries the response was YES. [2024-06-21 17:01:51,139 INFO L83 FinitePrefix]: Finished finitePrefix Result has 102316 conditions, 16208 events. 11359/16208 cut-off events. For 421316/421344 co-relation queries the response was YES. Maximal size of possible extension queue 591. Compared 94510 event pairs, 3812 based on Foata normal form. 26/16228 useless extension candidates. Maximal degree in co-relation 102261. Up to 15438 conditions per place. [2024-06-21 17:01:51,220 INFO L140 encePairwiseOnDemand]: 41/51 looper letters, 216 selfloop transitions, 29 changer transitions 0/252 dead transitions. [2024-06-21 17:01:51,220 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 135 places, 252 transitions, 3503 flow [2024-06-21 17:01:51,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 17:01:51,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 17:01:51,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 147 transitions. [2024-06-21 17:01:51,235 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4803921568627451 [2024-06-21 17:01:51,235 INFO L175 Difference]: Start difference. First operand has 130 places, 228 transitions, 2927 flow. Second operand 6 states and 147 transitions. [2024-06-21 17:01:51,235 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 135 places, 252 transitions, 3503 flow [2024-06-21 17:01:51,799 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 129 places, 252 transitions, 3099 flow, removed 46 selfloop flow, removed 6 redundant places. [2024-06-21 17:01:51,802 INFO L231 Difference]: Finished difference. Result has 130 places, 228 transitions, 2593 flow [2024-06-21 17:01:51,803 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=2523, PETRI_DIFFERENCE_MINUEND_PLACES=124, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=228, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=199, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2593, PETRI_PLACES=130, PETRI_TRANSITIONS=228} [2024-06-21 17:01:51,803 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 76 predicate places. [2024-06-21 17:01:51,803 INFO L495 AbstractCegarLoop]: Abstraction has has 130 places, 228 transitions, 2593 flow [2024-06-21 17:01:51,803 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 14.857142857142858) internal successors, (104), 7 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 17:01:51,804 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:01:51,804 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:01:51,804 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-06-21 17:01:51,804 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 17:01:51,804 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:01:51,804 INFO L85 PathProgramCache]: Analyzing trace with hash 162646911, now seen corresponding path program 1 times [2024-06-21 17:01:51,804 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:01:51,805 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [71417575] [2024-06-21 17:01:51,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:01:51,805 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:01:51,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:01:52,337 INFO 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 17:01:52,338 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:01:52,338 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [71417575] [2024-06-21 17:01:52,338 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [71417575] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:01:52,338 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:01:52,338 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 17:01:52,338 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [477635634] [2024-06-21 17:01:52,338 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:01:52,339 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 17:01:52,339 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:01:52,339 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 17:01:52,339 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-21 17:01:52,439 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 51 [2024-06-21 17:01:52,439 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 130 places, 228 transitions, 2593 flow. Second operand has 7 states, 7 states have (on average 15.857142857142858) internal successors, (111), 7 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:01:52,439 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:01:52,439 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 51 [2024-06-21 17:01:52,439 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:01:54,482 INFO L124 PetriNetUnfolderBase]: 10227/14957 cut-off events. [2024-06-21 17:01:54,483 INFO L125 PetriNetUnfolderBase]: For 364450/364452 co-relation queries the response was YES. [2024-06-21 17:01:54,560 INFO L83 FinitePrefix]: Finished finitePrefix Result has 89705 conditions, 14957 events. 10227/14957 cut-off events. For 364450/364452 co-relation queries the response was YES. Maximal size of possible extension queue 559. Compared 89776 event pairs, 3356 based on Foata normal form. 8/14956 useless extension candidates. Maximal degree in co-relation 89649. Up to 13898 conditions per place. [2024-06-21 17:01:54,635 INFO L140 encePairwiseOnDemand]: 40/51 looper letters, 225 selfloop transitions, 25 changer transitions 0/258 dead transitions. [2024-06-21 17:01:54,635 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 135 places, 258 transitions, 3321 flow [2024-06-21 17:01:54,635 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 17:01:54,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 17:01:54,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 160 transitions. [2024-06-21 17:01:54,636 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5228758169934641 [2024-06-21 17:01:54,636 INFO L175 Difference]: Start difference. First operand has 130 places, 228 transitions, 2593 flow. Second operand 6 states and 160 transitions. [2024-06-21 17:01:54,636 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 135 places, 258 transitions, 3321 flow [2024-06-21 17:01:55,263 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 130 places, 258 transitions, 3240 flow, removed 8 selfloop flow, removed 5 redundant places. [2024-06-21 17:01:55,268 INFO L231 Difference]: Finished difference. Result has 131 places, 232 transitions, 2627 flow [2024-06-21 17:01:55,269 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=2512, PETRI_DIFFERENCE_MINUEND_PLACES=125, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=228, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=206, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2627, PETRI_PLACES=131, PETRI_TRANSITIONS=232} [2024-06-21 17:01:55,270 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 77 predicate places. [2024-06-21 17:01:55,270 INFO L495 AbstractCegarLoop]: Abstraction has has 131 places, 232 transitions, 2627 flow [2024-06-21 17:01:55,270 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.857142857142858) internal successors, (111), 7 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:01:55,270 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:01:55,270 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:01:55,270 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-06-21 17:01:55,270 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 17:01:55,271 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:01:55,271 INFO L85 PathProgramCache]: Analyzing trace with hash 998636001, now seen corresponding path program 2 times [2024-06-21 17:01:55,271 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:01:55,271 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2083497733] [2024-06-21 17:01:55,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:01:55,271 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:01:55,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:01:55,838 INFO 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 17:01:55,838 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:01:55,838 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2083497733] [2024-06-21 17:01:55,839 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2083497733] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:01:55,839 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:01:55,839 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 17:01:55,839 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [947596759] [2024-06-21 17:01:55,839 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:01:55,841 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 17:01:55,841 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:01:55,841 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 17:01:55,842 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-21 17:01:55,921 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 51 [2024-06-21 17:01:55,921 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 131 places, 232 transitions, 2627 flow. Second operand has 7 states, 7 states have (on average 15.857142857142858) internal successors, (111), 7 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:01:55,921 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:01:55,921 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 51 [2024-06-21 17:01:55,921 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:01:57,700 INFO L124 PetriNetUnfolderBase]: 10075/14685 cut-off events. [2024-06-21 17:01:57,701 INFO L125 PetriNetUnfolderBase]: For 378883/378889 co-relation queries the response was YES. [2024-06-21 17:01:57,789 INFO L83 FinitePrefix]: Finished finitePrefix Result has 89355 conditions, 14685 events. 10075/14685 cut-off events. For 378883/378889 co-relation queries the response was YES. Maximal size of possible extension queue 538. Compared 87209 event pairs, 3276 based on Foata normal form. 5/14681 useless extension candidates. Maximal degree in co-relation 89298. Up to 13682 conditions per place. [2024-06-21 17:01:57,862 INFO L140 encePairwiseOnDemand]: 40/51 looper letters, 219 selfloop transitions, 26 changer transitions 0/253 dead transitions. [2024-06-21 17:01:57,863 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 136 places, 253 transitions, 3179 flow [2024-06-21 17:01:57,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 17:01:57,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 17:01:57,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 156 transitions. [2024-06-21 17:01:57,864 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5098039215686274 [2024-06-21 17:01:57,864 INFO L175 Difference]: Start difference. First operand has 131 places, 232 transitions, 2627 flow. Second operand 6 states and 156 transitions. [2024-06-21 17:01:57,864 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 136 places, 253 transitions, 3179 flow [2024-06-21 17:01:58,429 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 133 places, 253 transitions, 3124 flow, removed 13 selfloop flow, removed 3 redundant places. [2024-06-21 17:01:58,432 INFO L231 Difference]: Finished difference. Result has 134 places, 232 transitions, 2633 flow [2024-06-21 17:01:58,432 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=2572, PETRI_DIFFERENCE_MINUEND_PLACES=128, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=232, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=206, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2633, PETRI_PLACES=134, PETRI_TRANSITIONS=232} [2024-06-21 17:01:58,433 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 80 predicate places. [2024-06-21 17:01:58,433 INFO L495 AbstractCegarLoop]: Abstraction has has 134 places, 232 transitions, 2633 flow [2024-06-21 17:01:58,433 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.857142857142858) internal successors, (111), 7 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:01:58,433 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:01:58,433 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:01:58,433 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2024-06-21 17:01:58,434 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 17:01:58,434 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:01:58,434 INFO L85 PathProgramCache]: Analyzing trace with hash -111561921, now seen corresponding path program 1 times [2024-06-21 17:01:58,434 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:01:58,434 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1128640740] [2024-06-21 17:01:58,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:01:58,434 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:01:58,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:01:59,107 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:01:59,107 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:01:59,107 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1128640740] [2024-06-21 17:01:59,107 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1128640740] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:01:59,108 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:01:59,108 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:01:59,108 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1036117186] [2024-06-21 17:01:59,108 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:01:59,108 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:01:59,108 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:01:59,109 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:01:59,109 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:01:59,256 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 51 [2024-06-21 17:01:59,256 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 134 places, 232 transitions, 2633 flow. Second operand has 9 states, 9 states have (on average 14.444444444444445) internal successors, (130), 9 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 17:01:59,257 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:01:59,257 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 51 [2024-06-21 17:01:59,257 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:02:01,647 INFO L124 PetriNetUnfolderBase]: 13480/19548 cut-off events. [2024-06-21 17:02:01,647 INFO L125 PetriNetUnfolderBase]: For 616772/616778 co-relation queries the response was YES. [2024-06-21 17:02:01,788 INFO L83 FinitePrefix]: Finished finitePrefix Result has 122623 conditions, 19548 events. 13480/19548 cut-off events. For 616772/616778 co-relation queries the response was YES. Maximal size of possible extension queue 779. Compared 121717 event pairs, 3452 based on Foata normal form. 91/19626 useless extension candidates. Maximal degree in co-relation 122565. Up to 10646 conditions per place. [2024-06-21 17:02:01,889 INFO L140 encePairwiseOnDemand]: 37/51 looper letters, 174 selfloop transitions, 132 changer transitions 0/313 dead transitions. [2024-06-21 17:02:01,889 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 141 places, 313 transitions, 4093 flow [2024-06-21 17:02:01,890 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 17:02:01,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 17:02:01,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 238 transitions. [2024-06-21 17:02:01,890 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5833333333333334 [2024-06-21 17:02:01,890 INFO L175 Difference]: Start difference. First operand has 134 places, 232 transitions, 2633 flow. Second operand 8 states and 238 transitions. [2024-06-21 17:02:01,890 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 141 places, 313 transitions, 4093 flow [2024-06-21 17:02:02,685 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 134 places, 313 transitions, 4001 flow, removed 4 selfloop flow, removed 7 redundant places. [2024-06-21 17:02:02,689 INFO L231 Difference]: Finished difference. Result has 137 places, 240 transitions, 3095 flow [2024-06-21 17:02:02,689 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=2541, PETRI_DIFFERENCE_MINUEND_PLACES=127, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=232, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=125, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=103, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3095, PETRI_PLACES=137, PETRI_TRANSITIONS=240} [2024-06-21 17:02:02,697 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 83 predicate places. [2024-06-21 17:02:02,697 INFO L495 AbstractCegarLoop]: Abstraction has has 137 places, 240 transitions, 3095 flow [2024-06-21 17:02:02,698 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 14.444444444444445) internal successors, (130), 9 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 17:02:02,698 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:02:02,698 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:02:02,698 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2024-06-21 17:02:02,698 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 17:02:02,698 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:02:02,698 INFO L85 PathProgramCache]: Analyzing trace with hash -22996161, now seen corresponding path program 2 times [2024-06-21 17:02:02,699 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:02:02,699 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1728502554] [2024-06-21 17:02:02,699 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:02:02,699 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:02:02,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:02:03,565 INFO 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 17:02:03,565 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:02:03,566 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1728502554] [2024-06-21 17:02:03,566 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1728502554] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:02:03,566 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:02:03,566 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:02:03,566 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [938607095] [2024-06-21 17:02:03,566 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:02:03,566 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:02:03,567 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:02:03,567 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:02:03,567 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:02:03,657 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 51 [2024-06-21 17:02:03,658 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 137 places, 240 transitions, 3095 flow. Second operand has 9 states, 9 states have (on average 14.444444444444445) internal successors, (130), 9 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 17:02:03,658 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:02:03,658 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 51 [2024-06-21 17:02:03,658 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:02:06,741 INFO L124 PetriNetUnfolderBase]: 15028/21971 cut-off events. [2024-06-21 17:02:06,742 INFO L125 PetriNetUnfolderBase]: For 766571/766577 co-relation queries the response was YES. [2024-06-21 17:02:06,861 INFO L83 FinitePrefix]: Finished finitePrefix Result has 145313 conditions, 21971 events. 15028/21971 cut-off events. For 766571/766577 co-relation queries the response was YES. Maximal size of possible extension queue 941. Compared 142123 event pairs, 4836 based on Foata normal form. 91/22048 useless extension candidates. Maximal degree in co-relation 145253. Up to 15581 conditions per place. [2024-06-21 17:02:06,968 INFO L140 encePairwiseOnDemand]: 37/51 looper letters, 162 selfloop transitions, 142 changer transitions 0/311 dead transitions. [2024-06-21 17:02:06,968 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 144 places, 311 transitions, 4409 flow [2024-06-21 17:02:06,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 17:02:06,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 17:02:06,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 233 transitions. [2024-06-21 17:02:06,969 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.571078431372549 [2024-06-21 17:02:06,969 INFO L175 Difference]: Start difference. First operand has 137 places, 240 transitions, 3095 flow. Second operand 8 states and 233 transitions. [2024-06-21 17:02:06,969 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 144 places, 311 transitions, 4409 flow [2024-06-21 17:02:08,308 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 141 places, 311 transitions, 4200 flow, removed 43 selfloop flow, removed 3 redundant places. [2024-06-21 17:02:08,312 INFO L231 Difference]: Finished difference. Result has 143 places, 246 transitions, 3380 flow [2024-06-21 17:02:08,312 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=2886, PETRI_DIFFERENCE_MINUEND_PLACES=134, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=240, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=138, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=100, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3380, PETRI_PLACES=143, PETRI_TRANSITIONS=246} [2024-06-21 17:02:08,314 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 89 predicate places. [2024-06-21 17:02:08,314 INFO L495 AbstractCegarLoop]: Abstraction has has 143 places, 246 transitions, 3380 flow [2024-06-21 17:02:08,314 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 14.444444444444445) internal successors, (130), 9 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 17:02:08,315 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:02:08,315 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:02:08,315 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2024-06-21 17:02:08,315 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 17:02:08,315 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:02:08,315 INFO L85 PathProgramCache]: Analyzing trace with hash -1917358073, now seen corresponding path program 1 times [2024-06-21 17:02:08,315 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:02:08,315 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [957908154] [2024-06-21 17:02:08,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:02:08,316 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:02:08,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:02:09,138 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 17:02:09,138 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:02:09,138 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [957908154] [2024-06-21 17:02:09,138 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [957908154] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:02:09,138 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:02:09,139 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 17:02:09,139 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2047089617] [2024-06-21 17:02:09,139 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:02:09,139 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 17:02:09,139 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:02:09,140 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 17:02:09,140 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-21 17:02:09,218 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 51 [2024-06-21 17:02:09,218 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 143 places, 246 transitions, 3380 flow. Second operand has 8 states, 8 states have (on average 14.75) internal successors, (118), 8 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:02:09,218 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:02:09,218 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 51 [2024-06-21 17:02:09,218 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:02:12,904 INFO L124 PetriNetUnfolderBase]: 15220/22351 cut-off events. [2024-06-21 17:02:12,904 INFO L125 PetriNetUnfolderBase]: For 803066/803088 co-relation queries the response was YES. [2024-06-21 17:02:13,008 INFO L83 FinitePrefix]: Finished finitePrefix Result has 151241 conditions, 22351 events. 15220/22351 cut-off events. For 803066/803088 co-relation queries the response was YES. Maximal size of possible extension queue 947. Compared 145801 event pairs, 5125 based on Foata normal form. 43/22380 useless extension candidates. Maximal degree in co-relation 151178. Up to 19055 conditions per place. [2024-06-21 17:02:13,113 INFO L140 encePairwiseOnDemand]: 38/51 looper letters, 146 selfloop transitions, 148 changer transitions 0/301 dead transitions. [2024-06-21 17:02:13,114 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 149 places, 301 transitions, 4534 flow [2024-06-21 17:02:13,114 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 17:02:13,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 17:02:13,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 196 transitions. [2024-06-21 17:02:13,115 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5490196078431373 [2024-06-21 17:02:13,115 INFO L175 Difference]: Start difference. First operand has 143 places, 246 transitions, 3380 flow. Second operand 7 states and 196 transitions. [2024-06-21 17:02:13,115 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 149 places, 301 transitions, 4534 flow [2024-06-21 17:02:14,555 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 144 places, 301 transitions, 4158 flow, removed 46 selfloop flow, removed 5 redundant places. [2024-06-21 17:02:14,559 INFO L231 Difference]: Finished difference. Result has 145 places, 257 transitions, 3515 flow [2024-06-21 17:02:14,559 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=3024, PETRI_DIFFERENCE_MINUEND_PLACES=138, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=246, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=137, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=108, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3515, PETRI_PLACES=145, PETRI_TRANSITIONS=257} [2024-06-21 17:02:14,560 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 91 predicate places. [2024-06-21 17:02:14,560 INFO L495 AbstractCegarLoop]: Abstraction has has 145 places, 257 transitions, 3515 flow [2024-06-21 17:02:14,560 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 14.75) internal successors, (118), 8 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:02:14,560 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:02:14,560 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:02:14,560 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2024-06-21 17:02:14,560 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 17:02:14,561 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:02:14,561 INFO L85 PathProgramCache]: Analyzing trace with hash -743937187, now seen corresponding path program 3 times [2024-06-21 17:02:14,561 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:02:14,561 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1155882422] [2024-06-21 17:02:14,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:02:14,561 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:02:14,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:02:15,355 INFO 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 17:02:15,355 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:02:15,356 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1155882422] [2024-06-21 17:02:15,356 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1155882422] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:02:15,356 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:02:15,356 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:02:15,356 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1371249648] [2024-06-21 17:02:15,356 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:02:15,356 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:02:15,357 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:02:15,357 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:02:15,358 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:02:15,507 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 51 [2024-06-21 17:02:15,507 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 145 places, 257 transitions, 3515 flow. Second operand has 9 states, 9 states have (on average 14.444444444444445) internal successors, (130), 9 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 17:02:15,507 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:02:15,508 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 51 [2024-06-21 17:02:15,508 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:02:19,316 INFO L124 PetriNetUnfolderBase]: 16535/24432 cut-off events. [2024-06-21 17:02:19,316 INFO L125 PetriNetUnfolderBase]: For 909993/910015 co-relation queries the response was YES. [2024-06-21 17:02:19,441 INFO L83 FinitePrefix]: Finished finitePrefix Result has 163412 conditions, 24432 events. 16535/24432 cut-off events. For 909993/910015 co-relation queries the response was YES. Maximal size of possible extension queue 1061. Compared 163378 event pairs, 4821 based on Foata normal form. 97/24515 useless extension candidates. Maximal degree in co-relation 163348. Up to 18361 conditions per place. [2024-06-21 17:02:19,575 INFO L140 encePairwiseOnDemand]: 37/51 looper letters, 174 selfloop transitions, 151 changer transitions 0/332 dead transitions. [2024-06-21 17:02:19,575 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 152 places, 332 transitions, 4973 flow [2024-06-21 17:02:19,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 17:02:19,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 17:02:19,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 236 transitions. [2024-06-21 17:02:19,576 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5784313725490197 [2024-06-21 17:02:19,577 INFO L175 Difference]: Start difference. First operand has 145 places, 257 transitions, 3515 flow. Second operand 8 states and 236 transitions. [2024-06-21 17:02:19,577 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 152 places, 332 transitions, 4973 flow [2024-06-21 17:02:20,779 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 148 places, 332 transitions, 4710 flow, removed 20 selfloop flow, removed 4 redundant places. [2024-06-21 17:02:20,785 INFO L231 Difference]: Finished difference. Result has 150 places, 262 transitions, 3747 flow [2024-06-21 17:02:20,786 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=3252, PETRI_DIFFERENCE_MINUEND_PLACES=141, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=257, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=147, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=107, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3747, PETRI_PLACES=150, PETRI_TRANSITIONS=262} [2024-06-21 17:02:20,786 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 96 predicate places. [2024-06-21 17:02:20,786 INFO L495 AbstractCegarLoop]: Abstraction has has 150 places, 262 transitions, 3747 flow [2024-06-21 17:02:20,786 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 14.444444444444445) internal successors, (130), 9 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 17:02:20,786 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:02:20,787 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:02:20,787 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2024-06-21 17:02:20,787 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 17:02:20,787 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:02:20,787 INFO L85 PathProgramCache]: Analyzing trace with hash 1089178077, now seen corresponding path program 4 times [2024-06-21 17:02:20,787 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:02:20,787 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [347468170] [2024-06-21 17:02:20,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:02:20,788 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:02:20,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:02:21,456 INFO 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 17:02:21,456 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:02:21,456 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [347468170] [2024-06-21 17:02:21,456 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [347468170] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:02:21,456 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:02:21,456 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:02:21,457 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [375393907] [2024-06-21 17:02:21,457 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:02:21,457 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:02:21,457 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:02:21,457 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:02:21,457 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:02:21,534 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 51 [2024-06-21 17:02:21,534 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 150 places, 262 transitions, 3747 flow. Second operand has 9 states, 9 states have (on average 14.444444444444445) internal successors, (130), 9 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 17:02:21,535 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:02:21,535 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 51 [2024-06-21 17:02:21,535 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:02:25,807 INFO L124 PetriNetUnfolderBase]: 17146/25367 cut-off events. [2024-06-21 17:02:25,808 INFO L125 PetriNetUnfolderBase]: For 1004603/1004625 co-relation queries the response was YES. [2024-06-21 17:02:25,973 INFO L83 FinitePrefix]: Finished finitePrefix Result has 172377 conditions, 25367 events. 17146/25367 cut-off events. For 1004603/1004625 co-relation queries the response was YES. Maximal size of possible extension queue 1116. Compared 171216 event pairs, 5895 based on Foata normal form. 111/25464 useless extension candidates. Maximal degree in co-relation 172311. Up to 21044 conditions per place. [2024-06-21 17:02:26,094 INFO L140 encePairwiseOnDemand]: 37/51 looper letters, 170 selfloop transitions, 149 changer transitions 0/326 dead transitions. [2024-06-21 17:02:26,094 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 157 places, 326 transitions, 4915 flow [2024-06-21 17:02:26,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 17:02:26,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 17:02:26,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 228 transitions. [2024-06-21 17:02:26,095 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5588235294117647 [2024-06-21 17:02:26,096 INFO L175 Difference]: Start difference. First operand has 150 places, 262 transitions, 3747 flow. Second operand 8 states and 228 transitions. [2024-06-21 17:02:26,096 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 157 places, 326 transitions, 4915 flow [2024-06-21 17:02:27,728 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 153 places, 326 transitions, 4674 flow, removed 36 selfloop flow, removed 4 redundant places. [2024-06-21 17:02:27,732 INFO L231 Difference]: Finished difference. Result has 154 places, 264 transitions, 3900 flow [2024-06-21 17:02:27,732 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=3508, PETRI_DIFFERENCE_MINUEND_PLACES=146, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=262, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=147, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=113, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3900, PETRI_PLACES=154, PETRI_TRANSITIONS=264} [2024-06-21 17:02:27,732 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 100 predicate places. [2024-06-21 17:02:27,732 INFO L495 AbstractCegarLoop]: Abstraction has has 154 places, 264 transitions, 3900 flow [2024-06-21 17:02:27,733 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 14.444444444444445) internal successors, (130), 9 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 17:02:27,733 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:02:27,733 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:02:27,733 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2024-06-21 17:02:27,733 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 17:02:27,733 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:02:27,733 INFO L85 PathProgramCache]: Analyzing trace with hash -583613271, now seen corresponding path program 5 times [2024-06-21 17:02:27,733 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:02:27,733 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [726350236] [2024-06-21 17:02:27,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:02:27,734 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:02:27,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:02:28,488 INFO 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 17:02:28,489 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:02:28,489 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [726350236] [2024-06-21 17:02:28,489 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [726350236] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:02:28,489 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:02:28,489 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:02:28,489 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1912015585] [2024-06-21 17:02:28,490 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:02:28,490 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:02:28,490 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:02:28,490 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:02:28,490 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:02:28,607 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 51 [2024-06-21 17:02:28,607 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 154 places, 264 transitions, 3900 flow. Second operand has 9 states, 9 states have (on average 14.444444444444445) internal successors, (130), 9 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 17:02:28,607 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:02:28,607 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 51 [2024-06-21 17:02:28,608 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:02:32,952 INFO L124 PetriNetUnfolderBase]: 17757/26265 cut-off events. [2024-06-21 17:02:32,953 INFO L125 PetriNetUnfolderBase]: For 1062302/1062332 co-relation queries the response was YES. [2024-06-21 17:02:33,131 INFO L83 FinitePrefix]: Finished finitePrefix Result has 179493 conditions, 26265 events. 17757/26265 cut-off events. For 1062302/1062332 co-relation queries the response was YES. Maximal size of possible extension queue 1166. Compared 178373 event pairs, 6043 based on Foata normal form. 117/26368 useless extension candidates. Maximal degree in co-relation 179425. Up to 21957 conditions per place. [2024-06-21 17:02:33,284 INFO L140 encePairwiseOnDemand]: 38/51 looper letters, 173 selfloop transitions, 143 changer transitions 0/323 dead transitions. [2024-06-21 17:02:33,284 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 161 places, 323 transitions, 4928 flow [2024-06-21 17:02:33,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 17:02:33,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 17:02:33,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 222 transitions. [2024-06-21 17:02:33,286 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5441176470588235 [2024-06-21 17:02:33,286 INFO L175 Difference]: Start difference. First operand has 154 places, 264 transitions, 3900 flow. Second operand 8 states and 222 transitions. [2024-06-21 17:02:33,286 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 161 places, 323 transitions, 4928 flow [2024-06-21 17:02:35,143 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 155 places, 323 transitions, 4580 flow, removed 29 selfloop flow, removed 6 redundant places. [2024-06-21 17:02:35,147 INFO L231 Difference]: Finished difference. Result has 156 places, 266 transitions, 3936 flow [2024-06-21 17:02:35,147 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=3552, PETRI_DIFFERENCE_MINUEND_PLACES=148, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=264, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=141, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=121, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3936, PETRI_PLACES=156, PETRI_TRANSITIONS=266} [2024-06-21 17:02:35,147 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 102 predicate places. [2024-06-21 17:02:35,148 INFO L495 AbstractCegarLoop]: Abstraction has has 156 places, 266 transitions, 3936 flow [2024-06-21 17:02:35,148 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 14.444444444444445) internal successors, (130), 9 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 17:02:35,148 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:02:35,148 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:02:35,148 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2024-06-21 17:02:35,148 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 17:02:35,148 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:02:35,149 INFO L85 PathProgramCache]: Analyzing trace with hash -738211735, now seen corresponding path program 1 times [2024-06-21 17:02:35,149 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:02:35,149 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [305486793] [2024-06-21 17:02:35,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:02:35,149 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:02:35,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:02:35,807 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 17:02:35,807 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:02:35,808 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [305486793] [2024-06-21 17:02:35,808 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [305486793] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:02:35,808 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:02:35,808 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:02:35,808 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [61335705] [2024-06-21 17:02:35,808 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:02:35,808 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:02:35,809 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:02:35,809 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:02:35,809 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:02:35,920 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 51 [2024-06-21 17:02:35,920 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 156 places, 266 transitions, 3936 flow. Second operand has 9 states, 9 states have (on average 14.444444444444445) internal successors, (130), 9 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 17:02:35,920 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:02:35,920 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 51 [2024-06-21 17:02:35,920 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand