./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-wmm/mix013.oepc.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/mix013.oepc.yml/witness.yml --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 7724a2de Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReachWitnessValidation.xml -i ../../../trunk/examples/svcomp/pthread-wmm/mix013.oepc.i ./goblint.2024-06-19_11-23-25.files/protection/mix013.oepc.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-7724a2d-m [2024-06-27 20:00:05,851 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-27 20:00:05,912 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-27 20:00:05,919 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-27 20:00:05,920 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-27 20:00:05,933 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-27 20:00:05,933 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-27 20:00:05,933 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-27 20:00:05,934 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-27 20:00:05,934 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-27 20:00:05,934 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-27 20:00:05,935 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-27 20:00:05,935 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-27 20:00:05,935 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-27 20:00:05,936 INFO L153 SettingsManager]: * Use SBE=true [2024-06-27 20:00:05,936 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-27 20:00:05,936 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-27 20:00:05,937 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-27 20:00:05,937 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-27 20:00:05,937 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-27 20:00:05,938 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-27 20:00:05,939 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-27 20:00:05,940 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-27 20:00:05,940 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-27 20:00:05,943 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-27 20:00:05,943 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-27 20:00:05,943 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-27 20:00:05,944 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-27 20:00:05,944 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-27 20:00:05,945 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-27 20:00:05,945 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-27 20:00:05,946 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-27 20:00:05,946 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-27 20:00:05,946 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-27 20:00:05,946 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-27 20:00:05,946 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-27 20:00:05,947 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-27 20:00:05,947 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-27 20:00:05,947 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-27 20:00:05,947 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-27 20:00:05,947 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-27 20:00:05,948 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-27 20:00:05,948 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-27 20:00:05,948 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false [2024-06-27 20:00:06,137 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-27 20:00:06,152 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-27 20:00:06,154 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-27 20:00:06,155 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-27 20:00:06,155 INFO L274 PluginConnector]: CDTParser initialized [2024-06-27 20:00:06,156 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/mix013.oepc.i [2024-06-27 20:00:07,259 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-27 20:00:07,449 INFO L384 CDTParser]: Found 1 translation units. [2024-06-27 20:00:07,450 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/mix013.oepc.i [2024-06-27 20:00:07,460 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8f3391779/818f56d655294eaea76ff800afea734b/FLAG2986d28d5 [2024-06-27 20:00:07,469 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8f3391779/818f56d655294eaea76ff800afea734b [2024-06-27 20:00:07,471 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-06-27 20:00:07,472 INFO L274 PluginConnector]: Witness Parser initialized [2024-06-27 20:00:07,473 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-06-19_11-23-25.files/protection/mix013.oepc.yml/witness.yml [2024-06-27 20:00:07,688 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-27 20:00:07,689 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-06-27 20:00:07,690 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-27 20:00:07,690 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-27 20:00:07,693 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-27 20:00:07,694 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.06 08:00:07" (1/2) ... [2024-06-27 20:00:07,694 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6d2a2f7c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 08:00:07, skipping insertion in model container [2024-06-27 20:00:07,694 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.06 08:00:07" (1/2) ... [2024-06-27 20:00:07,695 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@2b45dbf5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 08:00:07, skipping insertion in model container [2024-06-27 20:00:07,696 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 27.06 08:00:07" (2/2) ... [2024-06-27 20:00:07,696 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6d2a2f7c and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 08:00:07, skipping insertion in model container [2024-06-27 20:00:07,696 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 27.06 08:00:07" (2/2) ... [2024-06-27 20:00:07,696 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-06-27 20:00:07,795 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-06-27 20:00:07,796 INFO L97 edCorrectnessWitness]: Location invariant before [L881-L881] ((((((((((((((((((((((((! multithreaded || a$read_delayed == (_Bool)0) && (! multithreaded || (y == 0 || y == 1))) && (! multithreaded || (a$w_buff1 == 0 || a$w_buff1 == 1))) && (! multithreaded || (__unbuffered_p3_EBX == 0 || __unbuffered_p3_EBX == 1))) && (! multithreaded || a$read_delayed_var == 0)) && (! multithreaded || (__unbuffered_p3_EAX == 0 || __unbuffered_p3_EAX == 1))) && (! multithreaded || a$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1))) && (! multithreaded || a$r_buff1_thd4 == (_Bool)0)) && (! multithreaded || a$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || a$r_buff0_thd4 == (_Bool)0)) && (! multithreaded || a$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || a$flush_delayed == (_Bool)0)) && (! multithreaded || (x == 0 || x == 1))) && (! multithreaded || a$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || a$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1))) && (! multithreaded || a$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || (a == 0 || a == 1))) && (! multithreaded || (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || (a$w_buff0 == 0 || a$w_buff0 == 1))) && (! multithreaded || (__unbuffered_p1_EBX == 0 || __unbuffered_p1_EBX == 1))) && (! multithreaded || (a$mem_tmp == 0 || a$mem_tmp == 1))) && (! multithreaded || (z == 0 || z == 1)) [2024-06-27 20:00:07,797 INFO L97 edCorrectnessWitness]: Location invariant before [L880-L880] ((((((((((((((((((((((((! multithreaded || a$read_delayed == (_Bool)0) && (! multithreaded || (y == 0 || y == 1))) && (! multithreaded || (a$w_buff1 == 0 || a$w_buff1 == 1))) && (! multithreaded || (__unbuffered_p3_EBX == 0 || __unbuffered_p3_EBX == 1))) && (! multithreaded || a$read_delayed_var == 0)) && (! multithreaded || (__unbuffered_p3_EAX == 0 || __unbuffered_p3_EAX == 1))) && (! multithreaded || a$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1))) && (! multithreaded || a$r_buff1_thd4 == (_Bool)0)) && (! multithreaded || a$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || a$r_buff0_thd4 == (_Bool)0)) && (! multithreaded || a$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || a$flush_delayed == (_Bool)0)) && (! multithreaded || (x == 0 || x == 1))) && (! multithreaded || a$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || a$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1))) && (! multithreaded || a$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || (a == 0 || a == 1))) && (! multithreaded || (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || (a$w_buff0 == 0 || a$w_buff0 == 1))) && (! multithreaded || (__unbuffered_p1_EBX == 0 || __unbuffered_p1_EBX == 1))) && (! multithreaded || (a$mem_tmp == 0 || a$mem_tmp == 1))) && (! multithreaded || (z == 0 || z == 1)) [2024-06-27 20:00:07,797 INFO L97 edCorrectnessWitness]: Location invariant before [L876-L876] ((((((((((((((((((((((((! multithreaded || a$read_delayed == (_Bool)0) && (! multithreaded || (y == 0 || y == 1))) && (! multithreaded || (a$w_buff1 == 0 || a$w_buff1 == 1))) && (! multithreaded || (__unbuffered_p3_EBX == 0 || __unbuffered_p3_EBX == 1))) && (! multithreaded || a$read_delayed_var == 0)) && (! multithreaded || (__unbuffered_p3_EAX == 0 || __unbuffered_p3_EAX == 1))) && (! multithreaded || a$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1))) && (! multithreaded || a$r_buff1_thd4 == (_Bool)0)) && (! multithreaded || a$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || a$r_buff0_thd4 == (_Bool)0)) && (! multithreaded || a$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || a$flush_delayed == (_Bool)0)) && (! multithreaded || (x == 0 || x == 1))) && (! multithreaded || a$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || a$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1))) && (! multithreaded || a$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || (a == 0 || a == 1))) && (! multithreaded || (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || (a$w_buff0 == 0 || a$w_buff0 == 1))) && (! multithreaded || (__unbuffered_p1_EBX == 0 || __unbuffered_p1_EBX == 1))) && (! multithreaded || (a$mem_tmp == 0 || a$mem_tmp == 1))) && (! multithreaded || (z == 0 || z == 1)) [2024-06-27 20:00:07,797 INFO L97 edCorrectnessWitness]: Location invariant before [L878-L878] ((((((((((((((((((((((((! multithreaded || a$read_delayed == (_Bool)0) && (! multithreaded || (y == 0 || y == 1))) && (! multithreaded || (a$w_buff1 == 0 || a$w_buff1 == 1))) && (! multithreaded || (__unbuffered_p3_EBX == 0 || __unbuffered_p3_EBX == 1))) && (! multithreaded || a$read_delayed_var == 0)) && (! multithreaded || (__unbuffered_p3_EAX == 0 || __unbuffered_p3_EAX == 1))) && (! multithreaded || a$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1))) && (! multithreaded || a$r_buff1_thd4 == (_Bool)0)) && (! multithreaded || a$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || a$r_buff0_thd4 == (_Bool)0)) && (! multithreaded || a$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || a$flush_delayed == (_Bool)0)) && (! multithreaded || (x == 0 || x == 1))) && (! multithreaded || a$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || a$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1))) && (! multithreaded || a$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || (a == 0 || a == 1))) && (! multithreaded || (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || (a$w_buff0 == 0 || a$w_buff0 == 1))) && (! multithreaded || (__unbuffered_p1_EBX == 0 || __unbuffered_p1_EBX == 1))) && (! multithreaded || (a$mem_tmp == 0 || a$mem_tmp == 1))) && (! multithreaded || (z == 0 || z == 1)) [2024-06-27 20:00:07,797 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-06-27 20:00:07,798 INFO L106 edCorrectnessWitness]: ghost_update [L874-L874] multithreaded = 1; [2024-06-27 20:00:07,836 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-27 20:00:08,130 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-27 20:00:08,137 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-06-27 20:00:08,288 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-27 20:00:08,346 INFO L206 MainTranslator]: Completed translation [2024-06-27 20:00:08,346 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 08:00:08 WrapperNode [2024-06-27 20:00:08,347 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-27 20:00:08,347 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-27 20:00:08,347 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-27 20:00:08,348 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-27 20:00:08,352 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 08:00:08" (1/1) ... [2024-06-27 20:00:08,377 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 08:00:08" (1/1) ... [2024-06-27 20:00:08,414 INFO L138 Inliner]: procedures = 176, calls = 56, calls flagged for inlining = 6, calls inlined = 7, statements flattened = 141 [2024-06-27 20:00:08,414 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-27 20:00:08,415 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-27 20:00:08,415 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-27 20:00:08,415 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-27 20:00:08,423 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 08:00:08" (1/1) ... [2024-06-27 20:00:08,423 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 08:00:08" (1/1) ... [2024-06-27 20:00:08,434 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 08:00:08" (1/1) ... [2024-06-27 20:00:08,453 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]. [2024-06-27 20:00:08,453 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 08:00:08" (1/1) ... [2024-06-27 20:00:08,453 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 08:00:08" (1/1) ... [2024-06-27 20:00:08,460 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 08:00:08" (1/1) ... [2024-06-27 20:00:08,462 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 08:00:08" (1/1) ... [2024-06-27 20:00:08,463 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 08:00:08" (1/1) ... [2024-06-27 20:00:08,464 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 08:00:08" (1/1) ... [2024-06-27 20:00:08,467 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-27 20:00:08,467 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-27 20:00:08,467 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-27 20:00:08,467 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-27 20:00:08,468 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 08:00:08" (1/1) ... [2024-06-27 20:00:08,472 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-27 20:00:08,477 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 20:00:08,488 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) [2024-06-27 20:00:08,505 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 [2024-06-27 20:00:08,516 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-06-27 20:00:08,516 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-27 20:00:08,517 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2024-06-27 20:00:08,517 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2024-06-27 20:00:08,517 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2024-06-27 20:00:08,517 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2024-06-27 20:00:08,517 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2024-06-27 20:00:08,517 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2024-06-27 20:00:08,517 INFO L130 BoogieDeclarations]: Found specification of procedure P3 [2024-06-27 20:00:08,518 INFO L138 BoogieDeclarations]: Found implementation of procedure P3 [2024-06-27 20:00:08,518 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-27 20:00:08,518 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-06-27 20:00:08,518 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-27 20:00:08,518 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-27 20:00:08,519 WARN L214 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2024-06-27 20:00:08,614 INFO L244 CfgBuilder]: Building ICFG [2024-06-27 20:00:08,615 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-27 20:00:08,942 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-27 20:00:08,942 INFO L293 CfgBuilder]: Performing block encoding [2024-06-27 20:00:09,130 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-27 20:00:09,131 INFO L320 CfgBuilder]: Removed 0 assume(true) statements. [2024-06-27 20:00:09,132 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.06 08:00:09 BoogieIcfgContainer [2024-06-27 20:00:09,132 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-27 20:00:09,135 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-27 20:00:09,135 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-27 20:00:09,138 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-27 20:00:09,138 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.06 08:00:07" (1/4) ... [2024-06-27 20:00:09,139 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@316f9c74 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.06 08:00:09, skipping insertion in model container [2024-06-27 20:00:09,139 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 27.06 08:00:07" (2/4) ... [2024-06-27 20:00:09,139 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@316f9c74 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 27.06 08:00:09, skipping insertion in model container [2024-06-27 20:00:09,139 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 08:00:08" (3/4) ... [2024-06-27 20:00:09,140 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@316f9c74 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 27.06 08:00:09, skipping insertion in model container [2024-06-27 20:00:09,140 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.06 08:00:09" (4/4) ... [2024-06-27 20:00:09,141 INFO L112 eAbstractionObserver]: Analyzing ICFG mix013.oepc.i [2024-06-27 20:00:09,154 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-27 20:00:09,154 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 4 error locations. [2024-06-27 20:00:09,154 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-27 20:00:09,201 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-06-27 20:00:09,232 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 66 places, 53 transitions, 122 flow [2024-06-27 20:00:09,268 INFO L124 PetriNetUnfolderBase]: 0/49 cut-off events. [2024-06-27 20:00:09,269 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-27 20:00:09,271 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62 conditions, 49 events. 0/49 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 97 event pairs, 0 based on Foata normal form. 0/45 useless extension candidates. Maximal degree in co-relation 0. Up to 1 conditions per place. [2024-06-27 20:00:09,271 INFO L82 GeneralOperation]: Start removeDead. Operand has 66 places, 53 transitions, 122 flow [2024-06-27 20:00:09,275 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 56 places, 43 transitions, 98 flow [2024-06-27 20:00:09,287 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-27 20:00:09,293 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;@3b333f10, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-27 20:00:09,293 INFO L358 AbstractCegarLoop]: Starting to check reachability of 8 error locations. [2024-06-27 20:00:09,298 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-27 20:00:09,298 INFO L124 PetriNetUnfolderBase]: 0/5 cut-off events. [2024-06-27 20:00:09,299 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-27 20:00:09,299 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:00:09,299 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2024-06-27 20:00:09,300 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)] === [2024-06-27 20:00:09,303 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:00:09,304 INFO L85 PathProgramCache]: Analyzing trace with hash 406078723, now seen corresponding path program 1 times [2024-06-27 20:00:09,313 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:00:09,313 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [665895383] [2024-06-27 20:00:09,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:00:09,314 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:00:09,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:00:10,259 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:00:10,260 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:00:10,260 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [665895383] [2024-06-27 20:00:10,261 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [665895383] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:00:10,261 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:00:10,261 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-06-27 20:00:10,262 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [350796945] [2024-06-27 20:00:10,263 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:00:10,268 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-27 20:00:10,272 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:00:10,291 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-27 20:00:10,292 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-27 20:00:10,346 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 53 [2024-06-27 20:00:10,351 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 43 transitions, 98 flow. Second operand has 3 states, 3 states have (on average 18.333333333333332) internal successors, (55), 3 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:00:10,351 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:00:10,351 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 53 [2024-06-27 20:00:10,352 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:00:11,574 INFO L124 PetriNetUnfolderBase]: 7892/11114 cut-off events. [2024-06-27 20:00:11,575 INFO L125 PetriNetUnfolderBase]: For 153/153 co-relation queries the response was YES. [2024-06-27 20:00:11,593 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22191 conditions, 11114 events. 7892/11114 cut-off events. For 153/153 co-relation queries the response was YES. Maximal size of possible extension queue 440. Compared 62430 event pairs, 6010 based on Foata normal form. 1/10890 useless extension candidates. Maximal degree in co-relation 22178. Up to 10748 conditions per place. [2024-06-27 20:00:11,638 INFO L140 encePairwiseOnDemand]: 44/53 looper letters, 42 selfloop transitions, 5 changer transitions 0/57 dead transitions. [2024-06-27 20:00:11,639 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 57 transitions, 229 flow [2024-06-27 20:00:11,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-27 20:00:11,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-27 20:00:11,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 102 transitions. [2024-06-27 20:00:11,648 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6415094339622641 [2024-06-27 20:00:11,650 INFO L175 Difference]: Start difference. First operand has 56 places, 43 transitions, 98 flow. Second operand 3 states and 102 transitions. [2024-06-27 20:00:11,650 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 57 transitions, 229 flow [2024-06-27 20:00:11,653 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 57 transitions, 222 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-06-27 20:00:11,657 INFO L231 Difference]: Finished difference. Result has 55 places, 47 transitions, 133 flow [2024-06-27 20:00:11,659 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=94, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=133, PETRI_PLACES=55, PETRI_TRANSITIONS=47} [2024-06-27 20:00:11,661 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, -1 predicate places. [2024-06-27 20:00:11,661 INFO L495 AbstractCegarLoop]: Abstraction has has 55 places, 47 transitions, 133 flow [2024-06-27 20:00:11,662 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 18.333333333333332) internal successors, (55), 3 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:00:11,662 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:00:11,662 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:00:11,663 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-27 20:00:11,663 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)] === [2024-06-27 20:00:11,663 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:00:11,663 INFO L85 PathProgramCache]: Analyzing trace with hash -600328798, now seen corresponding path program 1 times [2024-06-27 20:00:11,664 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:00:11,664 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1114013417] [2024-06-27 20:00:11,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:00:11,664 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:00:11,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:00:12,262 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:00:12,262 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:00:12,262 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1114013417] [2024-06-27 20:00:12,262 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1114013417] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:00:12,263 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:00:12,263 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-27 20:00:12,263 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [534556261] [2024-06-27 20:00:12,263 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:00:12,264 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-27 20:00:12,264 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:00:12,265 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-27 20:00:12,265 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-06-27 20:00:12,331 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 53 [2024-06-27 20:00:12,331 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 47 transitions, 133 flow. Second operand has 4 states, 4 states have (on average 18.25) internal successors, (73), 4 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:00:12,331 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:00:12,331 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 53 [2024-06-27 20:00:12,332 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:00:13,339 INFO L124 PetriNetUnfolderBase]: 7882/11122 cut-off events. [2024-06-27 20:00:13,340 INFO L125 PetriNetUnfolderBase]: For 2157/2157 co-relation queries the response was YES. [2024-06-27 20:00:13,355 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25160 conditions, 11122 events. 7882/11122 cut-off events. For 2157/2157 co-relation queries the response was YES. Maximal size of possible extension queue 440. Compared 62420 event pairs, 5323 based on Foata normal form. 4/11061 useless extension candidates. Maximal degree in co-relation 25148. Up to 10713 conditions per place. [2024-06-27 20:00:13,401 INFO L140 encePairwiseOnDemand]: 43/53 looper letters, 52 selfloop transitions, 9 changer transitions 0/71 dead transitions. [2024-06-27 20:00:13,402 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 71 transitions, 321 flow [2024-06-27 20:00:13,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-27 20:00:13,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-27 20:00:13,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 133 transitions. [2024-06-27 20:00:13,406 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6273584905660378 [2024-06-27 20:00:13,406 INFO L175 Difference]: Start difference. First operand has 55 places, 47 transitions, 133 flow. Second operand 4 states and 133 transitions. [2024-06-27 20:00:13,407 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 71 transitions, 321 flow [2024-06-27 20:00:13,408 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 71 transitions, 316 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-27 20:00:13,409 INFO L231 Difference]: Finished difference. Result has 58 places, 51 transitions, 181 flow [2024-06-27 20:00:13,409 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=128, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=181, PETRI_PLACES=58, PETRI_TRANSITIONS=51} [2024-06-27 20:00:13,410 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 2 predicate places. [2024-06-27 20:00:13,411 INFO L495 AbstractCegarLoop]: Abstraction has has 58 places, 51 transitions, 181 flow [2024-06-27 20:00:13,412 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 18.25) internal successors, (73), 4 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:00:13,413 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:00:13,413 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:00:13,413 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-06-27 20:00:13,414 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)] === [2024-06-27 20:00:13,418 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:00:13,418 INFO L85 PathProgramCache]: Analyzing trace with hash -1390312895, now seen corresponding path program 1 times [2024-06-27 20:00:13,418 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:00:13,419 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [148826988] [2024-06-27 20:00:13,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:00:13,419 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:00:13,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:00:14,450 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:00:14,451 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:00:14,451 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [148826988] [2024-06-27 20:00:14,451 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [148826988] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:00:14,451 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:00:14,451 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 20:00:14,452 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [40301108] [2024-06-27 20:00:14,452 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:00:14,452 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 20:00:14,452 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:00:14,453 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 20:00:14,453 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-06-27 20:00:14,542 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 53 [2024-06-27 20:00:14,542 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 51 transitions, 181 flow. Second operand has 6 states, 6 states have (on average 17.166666666666668) internal successors, (103), 6 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:00:14,542 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:00:14,543 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 53 [2024-06-27 20:00:14,543 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:00:15,831 INFO L124 PetriNetUnfolderBase]: 9557/13417 cut-off events. [2024-06-27 20:00:15,831 INFO L125 PetriNetUnfolderBase]: For 7145/7145 co-relation queries the response was YES. [2024-06-27 20:00:15,847 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33656 conditions, 13417 events. 9557/13417 cut-off events. For 7145/7145 co-relation queries the response was YES. Maximal size of possible extension queue 516. Compared 75888 event pairs, 5407 based on Foata normal form. 4/13346 useless extension candidates. Maximal degree in co-relation 33642. Up to 12912 conditions per place. [2024-06-27 20:00:15,886 INFO L140 encePairwiseOnDemand]: 41/53 looper letters, 73 selfloop transitions, 17 changer transitions 0/99 dead transitions. [2024-06-27 20:00:15,886 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 99 transitions, 508 flow [2024-06-27 20:00:15,887 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 20:00:15,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 20:00:15,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 190 transitions. [2024-06-27 20:00:15,888 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5974842767295597 [2024-06-27 20:00:15,888 INFO L175 Difference]: Start difference. First operand has 58 places, 51 transitions, 181 flow. Second operand 6 states and 190 transitions. [2024-06-27 20:00:15,888 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 99 transitions, 508 flow [2024-06-27 20:00:15,890 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 99 transitions, 480 flow, removed 6 selfloop flow, removed 2 redundant places. [2024-06-27 20:00:15,891 INFO L231 Difference]: Finished difference. Result has 63 places, 59 transitions, 258 flow [2024-06-27 20:00:15,892 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=162, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=258, PETRI_PLACES=63, PETRI_TRANSITIONS=59} [2024-06-27 20:00:15,892 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 7 predicate places. [2024-06-27 20:00:15,892 INFO L495 AbstractCegarLoop]: Abstraction has has 63 places, 59 transitions, 258 flow [2024-06-27 20:00:15,892 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 17.166666666666668) internal successors, (103), 6 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:00:15,893 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:00:15,893 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:00:15,893 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-06-27 20:00:15,893 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)] === [2024-06-27 20:00:15,893 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:00:15,893 INFO L85 PathProgramCache]: Analyzing trace with hash 707065253, now seen corresponding path program 1 times [2024-06-27 20:00:15,894 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:00:15,894 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [84712614] [2024-06-27 20:00:15,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:00:15,894 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:00:15,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:00:16,919 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:00:16,919 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:00:16,919 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [84712614] [2024-06-27 20:00:16,920 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [84712614] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:00:16,920 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:00:16,920 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 20:00:16,920 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [809219985] [2024-06-27 20:00:16,920 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:00:16,921 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 20:00:16,921 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:00:16,921 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 20:00:16,921 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-27 20:00:17,040 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 53 [2024-06-27 20:00:17,041 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 59 transitions, 258 flow. Second operand has 7 states, 7 states have (on average 17.142857142857142) internal successors, (120), 7 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:00:17,041 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:00:17,041 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 53 [2024-06-27 20:00:17,041 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:00:18,371 INFO L124 PetriNetUnfolderBase]: 9541/13385 cut-off events. [2024-06-27 20:00:18,371 INFO L125 PetriNetUnfolderBase]: For 14418/14418 co-relation queries the response was YES. [2024-06-27 20:00:18,394 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37510 conditions, 13385 events. 9541/13385 cut-off events. For 14418/14418 co-relation queries the response was YES. Maximal size of possible extension queue 516. Compared 75452 event pairs, 4602 based on Foata normal form. 8/13320 useless extension candidates. Maximal degree in co-relation 37494. Up to 12846 conditions per place. [2024-06-27 20:00:18,444 INFO L140 encePairwiseOnDemand]: 41/53 looper letters, 80 selfloop transitions, 20 changer transitions 0/109 dead transitions. [2024-06-27 20:00:18,444 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 109 transitions, 598 flow [2024-06-27 20:00:18,445 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 20:00:18,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 20:00:18,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 216 transitions. [2024-06-27 20:00:18,446 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5822102425876011 [2024-06-27 20:00:18,446 INFO L175 Difference]: Start difference. First operand has 63 places, 59 transitions, 258 flow. Second operand 7 states and 216 transitions. [2024-06-27 20:00:18,446 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 109 transitions, 598 flow [2024-06-27 20:00:18,450 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 109 transitions, 559 flow, removed 6 selfloop flow, removed 3 redundant places. [2024-06-27 20:00:18,451 INFO L231 Difference]: Finished difference. Result has 66 places, 61 transitions, 291 flow [2024-06-27 20:00:18,452 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=211, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=291, PETRI_PLACES=66, PETRI_TRANSITIONS=61} [2024-06-27 20:00:18,452 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 10 predicate places. [2024-06-27 20:00:18,453 INFO L495 AbstractCegarLoop]: Abstraction has has 66 places, 61 transitions, 291 flow [2024-06-27 20:00:18,453 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.142857142857142) internal successors, (120), 7 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:00:18,453 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:00:18,453 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:00:18,453 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-06-27 20:00:18,453 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)] === [2024-06-27 20:00:18,454 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:00:18,454 INFO L85 PathProgramCache]: Analyzing trace with hash -953008957, now seen corresponding path program 1 times [2024-06-27 20:00:18,454 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:00:18,454 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [558738943] [2024-06-27 20:00:18,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:00:18,454 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:00:18,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:00:19,181 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:00:19,182 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:00:19,182 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [558738943] [2024-06-27 20:00:19,182 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [558738943] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:00:19,182 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:00:19,182 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 20:00:19,182 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1701679442] [2024-06-27 20:00:19,182 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:00:19,183 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 20:00:19,183 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:00:19,184 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 20:00:19,184 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-06-27 20:00:19,264 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 53 [2024-06-27 20:00:19,265 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 61 transitions, 291 flow. Second operand has 6 states, 6 states have (on average 14.5) internal successors, (87), 6 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:00:19,265 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:00:19,265 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 53 [2024-06-27 20:00:19,265 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:00:20,830 INFO L124 PetriNetUnfolderBase]: 11584/16171 cut-off events. [2024-06-27 20:00:20,836 INFO L125 PetriNetUnfolderBase]: For 26114/26114 co-relation queries the response was YES. [2024-06-27 20:00:20,870 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48057 conditions, 16171 events. 11584/16171 cut-off events. For 26114/26114 co-relation queries the response was YES. Maximal size of possible extension queue 560. Compared 90343 event pairs, 6342 based on Foata normal form. 3/16105 useless extension candidates. Maximal degree in co-relation 48039. Up to 15660 conditions per place. [2024-06-27 20:00:20,941 INFO L140 encePairwiseOnDemand]: 43/53 looper letters, 65 selfloop transitions, 10 changer transitions 0/82 dead transitions. [2024-06-27 20:00:20,941 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 82 transitions, 511 flow [2024-06-27 20:00:20,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 20:00:20,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 20:00:20,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 128 transitions. [2024-06-27 20:00:20,946 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4830188679245283 [2024-06-27 20:00:20,946 INFO L175 Difference]: Start difference. First operand has 66 places, 61 transitions, 291 flow. Second operand 5 states and 128 transitions. [2024-06-27 20:00:20,946 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 82 transitions, 511 flow [2024-06-27 20:00:20,954 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 82 transitions, 457 flow, removed 9 selfloop flow, removed 5 redundant places. [2024-06-27 20:00:20,956 INFO L231 Difference]: Finished difference. Result has 66 places, 65 transitions, 302 flow [2024-06-27 20:00:20,957 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=237, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=302, PETRI_PLACES=66, PETRI_TRANSITIONS=65} [2024-06-27 20:00:20,959 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 10 predicate places. [2024-06-27 20:00:20,959 INFO L495 AbstractCegarLoop]: Abstraction has has 66 places, 65 transitions, 302 flow [2024-06-27 20:00:20,959 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 14.5) internal successors, (87), 6 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:00:20,959 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:00:20,959 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:00:20,959 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-06-27 20:00:20,959 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)] === [2024-06-27 20:00:20,960 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:00:20,960 INFO L85 PathProgramCache]: Analyzing trace with hash 521494375, now seen corresponding path program 1 times [2024-06-27 20:00:20,960 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:00:20,960 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1394778278] [2024-06-27 20:00:20,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:00:20,960 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:00:20,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:00:21,725 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:00:21,726 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:00:21,726 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1394778278] [2024-06-27 20:00:21,726 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1394778278] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:00:21,726 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:00:21,726 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 20:00:21,726 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1708121704] [2024-06-27 20:00:21,726 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:00:21,726 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 20:00:21,727 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:00:21,727 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 20:00:21,727 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-27 20:00:21,819 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 53 [2024-06-27 20:00:21,819 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 65 transitions, 302 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) [2024-06-27 20:00:21,819 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:00:21,819 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 53 [2024-06-27 20:00:21,819 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:00:23,519 INFO L124 PetriNetUnfolderBase]: 11566/16146 cut-off events. [2024-06-27 20:00:23,519 INFO L125 PetriNetUnfolderBase]: For 37275/37275 co-relation queries the response was YES. [2024-06-27 20:00:23,542 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51669 conditions, 16146 events. 11566/16146 cut-off events. For 37275/37275 co-relation queries the response was YES. Maximal size of possible extension queue 560. Compared 90041 event pairs, 6091 based on Foata normal form. 6/16081 useless extension candidates. Maximal degree in co-relation 51649. Up to 15606 conditions per place. [2024-06-27 20:00:23,593 INFO L140 encePairwiseOnDemand]: 42/53 looper letters, 73 selfloop transitions, 14 changer transitions 0/94 dead transitions. [2024-06-27 20:00:23,593 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 94 transitions, 572 flow [2024-06-27 20:00:23,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 20:00:23,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 20:00:23,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 153 transitions. [2024-06-27 20:00:23,595 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4811320754716981 [2024-06-27 20:00:23,595 INFO L175 Difference]: Start difference. First operand has 66 places, 65 transitions, 302 flow. Second operand 6 states and 153 transitions. [2024-06-27 20:00:23,595 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 94 transitions, 572 flow [2024-06-27 20:00:23,600 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 94 transitions, 539 flow, removed 9 selfloop flow, removed 3 redundant places. [2024-06-27 20:00:23,601 INFO L231 Difference]: Finished difference. Result has 69 places, 69 transitions, 348 flow [2024-06-27 20:00:23,601 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=269, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=65, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=348, PETRI_PLACES=69, PETRI_TRANSITIONS=69} [2024-06-27 20:00:23,601 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 13 predicate places. [2024-06-27 20:00:23,602 INFO L495 AbstractCegarLoop]: Abstraction has has 69 places, 69 transitions, 348 flow [2024-06-27 20:00:23,602 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) [2024-06-27 20:00:23,602 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:00:23,602 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:00:23,602 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-06-27 20:00:23,602 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)] === [2024-06-27 20:00:23,603 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:00:23,603 INFO L85 PathProgramCache]: Analyzing trace with hash 844996688, now seen corresponding path program 1 times [2024-06-27 20:00:23,603 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:00:23,603 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1152712311] [2024-06-27 20:00:23,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:00:23,603 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:00:23,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:00:24,405 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:00:24,405 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:00:24,405 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1152712311] [2024-06-27 20:00:24,405 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1152712311] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:00:24,406 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:00:24,406 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 20:00:24,406 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [832021145] [2024-06-27 20:00:24,406 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:00:24,406 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 20:00:24,406 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:00:24,406 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 20:00:24,406 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-27 20:00:24,510 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 53 [2024-06-27 20:00:24,511 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 69 transitions, 348 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) [2024-06-27 20:00:24,511 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:00:24,511 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 53 [2024-06-27 20:00:24,511 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:00:25,869 INFO L124 PetriNetUnfolderBase]: 11588/16237 cut-off events. [2024-06-27 20:00:25,869 INFO L125 PetriNetUnfolderBase]: For 49772/49782 co-relation queries the response was YES. [2024-06-27 20:00:25,899 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55725 conditions, 16237 events. 11588/16237 cut-off events. For 49772/49782 co-relation queries the response was YES. Maximal size of possible extension queue 561. Compared 91105 event pairs, 6077 based on Foata normal form. 11/16176 useless extension candidates. Maximal degree in co-relation 55704. Up to 15612 conditions per place. [2024-06-27 20:00:25,961 INFO L140 encePairwiseOnDemand]: 42/53 looper letters, 79 selfloop transitions, 21 changer transitions 0/107 dead transitions. [2024-06-27 20:00:25,961 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 107 transitions, 732 flow [2024-06-27 20:00:25,962 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 20:00:25,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 20:00:25,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 160 transitions. [2024-06-27 20:00:25,963 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5031446540880503 [2024-06-27 20:00:25,963 INFO L175 Difference]: Start difference. First operand has 69 places, 69 transitions, 348 flow. Second operand 6 states and 160 transitions. [2024-06-27 20:00:25,963 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 107 transitions, 732 flow [2024-06-27 20:00:25,970 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 107 transitions, 685 flow, removed 12 selfloop flow, removed 4 redundant places. [2024-06-27 20:00:25,971 INFO L231 Difference]: Finished difference. Result has 71 places, 77 transitions, 434 flow [2024-06-27 20:00:25,971 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=301, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=434, PETRI_PLACES=71, PETRI_TRANSITIONS=77} [2024-06-27 20:00:25,971 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 15 predicate places. [2024-06-27 20:00:25,972 INFO L495 AbstractCegarLoop]: Abstraction has has 71 places, 77 transitions, 434 flow [2024-06-27 20:00:25,972 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) [2024-06-27 20:00:25,972 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:00:25,972 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:00:25,972 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-06-27 20:00:25,972 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)] === [2024-06-27 20:00:25,973 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:00:25,973 INFO L85 PathProgramCache]: Analyzing trace with hash -469268924, now seen corresponding path program 2 times [2024-06-27 20:00:25,973 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:00:25,973 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [948025183] [2024-06-27 20:00:25,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:00:25,973 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:00:25,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:00:26,731 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:00:26,731 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:00:26,732 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [948025183] [2024-06-27 20:00:26,732 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [948025183] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:00:26,732 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:00:26,732 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 20:00:26,732 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1942226672] [2024-06-27 20:00:26,732 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:00:26,733 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 20:00:26,733 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:00:26,733 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 20:00:26,733 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-27 20:00:26,814 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 53 [2024-06-27 20:00:26,814 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 77 transitions, 434 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) [2024-06-27 20:00:26,814 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:00:26,814 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 53 [2024-06-27 20:00:26,814 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:00:28,225 INFO L124 PetriNetUnfolderBase]: 11579/16223 cut-off events. [2024-06-27 20:00:28,226 INFO L125 PetriNetUnfolderBase]: For 65160/65160 co-relation queries the response was YES. [2024-06-27 20:00:28,262 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59435 conditions, 16223 events. 11579/16223 cut-off events. For 65160/65160 co-relation queries the response was YES. Maximal size of possible extension queue 561. Compared 91012 event pairs, 6070 based on Foata normal form. 3/16155 useless extension candidates. Maximal degree in co-relation 59413. Up to 15639 conditions per place. [2024-06-27 20:00:28,323 INFO L140 encePairwiseOnDemand]: 42/53 looper letters, 80 selfloop transitions, 14 changer transitions 0/101 dead transitions. [2024-06-27 20:00:28,324 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 101 transitions, 684 flow [2024-06-27 20:00:28,324 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 20:00:28,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 20:00:28,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 152 transitions. [2024-06-27 20:00:28,325 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4779874213836478 [2024-06-27 20:00:28,325 INFO L175 Difference]: Start difference. First operand has 71 places, 77 transitions, 434 flow. Second operand 6 states and 152 transitions. [2024-06-27 20:00:28,325 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 101 transitions, 684 flow [2024-06-27 20:00:28,347 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 101 transitions, 622 flow, removed 26 selfloop flow, removed 2 redundant places. [2024-06-27 20:00:28,348 INFO L231 Difference]: Finished difference. Result has 75 places, 77 transitions, 411 flow [2024-06-27 20:00:28,348 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=372, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=77, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=411, PETRI_PLACES=75, PETRI_TRANSITIONS=77} [2024-06-27 20:00:28,349 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 19 predicate places. [2024-06-27 20:00:28,349 INFO L495 AbstractCegarLoop]: Abstraction has has 75 places, 77 transitions, 411 flow [2024-06-27 20:00:28,349 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) [2024-06-27 20:00:28,349 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:00:28,349 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:00:28,349 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-06-27 20:00:28,350 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)] === [2024-06-27 20:00:28,350 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:00:28,350 INFO L85 PathProgramCache]: Analyzing trace with hash 424974366, now seen corresponding path program 1 times [2024-06-27 20:00:28,350 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:00:28,350 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [874936537] [2024-06-27 20:00:28,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:00:28,351 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:00:28,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:00:29,349 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:00:29,350 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:00:29,350 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [874936537] [2024-06-27 20:00:29,350 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [874936537] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:00:29,350 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:00:29,350 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 20:00:29,351 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1133585817] [2024-06-27 20:00:29,351 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:00:29,351 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 20:00:29,351 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:00:29,352 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 20:00:29,352 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-27 20:00:29,502 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 53 [2024-06-27 20:00:29,503 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 77 transitions, 411 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) [2024-06-27 20:00:29,503 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:00:29,503 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 53 [2024-06-27 20:00:29,503 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:00:31,372 INFO L124 PetriNetUnfolderBase]: 11601/16256 cut-off events. [2024-06-27 20:00:31,373 INFO L125 PetriNetUnfolderBase]: For 72970/72970 co-relation queries the response was YES. [2024-06-27 20:00:31,425 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60175 conditions, 16256 events. 11601/16256 cut-off events. For 72970/72970 co-relation queries the response was YES. Maximal size of possible extension queue 561. Compared 91182 event pairs, 5940 based on Foata normal form. 3/16184 useless extension candidates. Maximal degree in co-relation 60151. Up to 15642 conditions per place. [2024-06-27 20:00:31,498 INFO L140 encePairwiseOnDemand]: 41/53 looper letters, 93 selfloop transitions, 18 changer transitions 0/118 dead transitions. [2024-06-27 20:00:31,499 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 81 places, 118 transitions, 771 flow [2024-06-27 20:00:31,499 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 20:00:31,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 20:00:31,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 182 transitions. [2024-06-27 20:00:31,500 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49056603773584906 [2024-06-27 20:00:31,500 INFO L175 Difference]: Start difference. First operand has 75 places, 77 transitions, 411 flow. Second operand 7 states and 182 transitions. [2024-06-27 20:00:31,500 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 81 places, 118 transitions, 771 flow [2024-06-27 20:00:31,527 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 118 transitions, 727 flow, removed 3 selfloop flow, removed 6 redundant places. [2024-06-27 20:00:31,528 INFO L231 Difference]: Finished difference. Result has 76 places, 81 transitions, 464 flow [2024-06-27 20:00:31,528 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=367, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=77, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=464, PETRI_PLACES=76, PETRI_TRANSITIONS=81} [2024-06-27 20:00:31,529 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 20 predicate places. [2024-06-27 20:00:31,529 INFO L495 AbstractCegarLoop]: Abstraction has has 76 places, 81 transitions, 464 flow [2024-06-27 20:00:31,529 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) [2024-06-27 20:00:31,529 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:00:31,530 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:00:31,530 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-06-27 20:00:31,530 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)] === [2024-06-27 20:00:31,530 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:00:31,530 INFO L85 PathProgramCache]: Analyzing trace with hash -1532424978, now seen corresponding path program 2 times [2024-06-27 20:00:31,530 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:00:31,531 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1509843084] [2024-06-27 20:00:31,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:00:31,531 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:00:31,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:00:32,500 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:00:32,500 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:00:32,500 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1509843084] [2024-06-27 20:00:32,500 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1509843084] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:00:32,501 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:00:32,501 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 20:00:32,501 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2026000508] [2024-06-27 20:00:32,501 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:00:32,501 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 20:00:32,501 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:00:32,501 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 20:00:32,502 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 20:00:32,657 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 53 [2024-06-27 20:00:32,658 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 81 transitions, 464 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) [2024-06-27 20:00:32,658 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:00:32,658 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 53 [2024-06-27 20:00:32,658 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:00:34,125 INFO L124 PetriNetUnfolderBase]: 11623/16288 cut-off events. [2024-06-27 20:00:34,126 INFO L125 PetriNetUnfolderBase]: For 91609/91619 co-relation queries the response was YES. [2024-06-27 20:00:34,163 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64170 conditions, 16288 events. 11623/16288 cut-off events. For 91609/91619 co-relation queries the response was YES. Maximal size of possible extension queue 561. Compared 91223 event pairs, 5947 based on Foata normal form. 11/16223 useless extension candidates. Maximal degree in co-relation 64146. Up to 15594 conditions per place. [2024-06-27 20:00:34,221 INFO L140 encePairwiseOnDemand]: 41/53 looper letters, 84 selfloop transitions, 35 changer transitions 0/126 dead transitions. [2024-06-27 20:00:34,221 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 126 transitions, 950 flow [2024-06-27 20:00:34,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 20:00:34,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 20:00:34,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 186 transitions. [2024-06-27 20:00:34,223 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5013477088948787 [2024-06-27 20:00:34,223 INFO L175 Difference]: Start difference. First operand has 76 places, 81 transitions, 464 flow. Second operand 7 states and 186 transitions. [2024-06-27 20:00:34,223 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 126 transitions, 950 flow [2024-06-27 20:00:34,245 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 126 transitions, 885 flow, removed 17 selfloop flow, removed 5 redundant places. [2024-06-27 20:00:34,247 INFO L231 Difference]: Finished difference. Result has 78 places, 89 transitions, 588 flow [2024-06-27 20:00:34,247 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=399, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=81, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=588, PETRI_PLACES=78, PETRI_TRANSITIONS=89} [2024-06-27 20:00:34,248 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 22 predicate places. [2024-06-27 20:00:34,248 INFO L495 AbstractCegarLoop]: Abstraction has has 78 places, 89 transitions, 588 flow [2024-06-27 20:00:34,248 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) [2024-06-27 20:00:34,248 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:00:34,248 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:00:34,248 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-06-27 20:00:34,248 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)] === [2024-06-27 20:00:34,249 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:00:34,249 INFO L85 PathProgramCache]: Analyzing trace with hash -1532424792, now seen corresponding path program 1 times [2024-06-27 20:00:34,249 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:00:34,249 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [13293807] [2024-06-27 20:00:34,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:00:34,249 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:00:34,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:00:35,189 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:00:35,189 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:00:35,189 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [13293807] [2024-06-27 20:00:35,190 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [13293807] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:00:35,190 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:00:35,190 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 20:00:35,190 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [579698346] [2024-06-27 20:00:35,190 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:00:35,190 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 20:00:35,190 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:00:35,190 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 20:00:35,191 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 20:00:35,300 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 53 [2024-06-27 20:00:35,300 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 89 transitions, 588 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) [2024-06-27 20:00:35,300 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:00:35,300 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 53 [2024-06-27 20:00:35,300 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:00:36,841 INFO L124 PetriNetUnfolderBase]: 11698/16339 cut-off events. [2024-06-27 20:00:36,842 INFO L125 PetriNetUnfolderBase]: For 116792/116796 co-relation queries the response was YES. [2024-06-27 20:00:36,877 INFO L83 FinitePrefix]: Finished finitePrefix Result has 68484 conditions, 16339 events. 11698/16339 cut-off events. For 116792/116796 co-relation queries the response was YES. Maximal size of possible extension queue 561. Compared 91260 event pairs, 5606 based on Foata normal form. 7/16314 useless extension candidates. Maximal degree in co-relation 68459. Up to 15673 conditions per place. [2024-06-27 20:00:36,936 INFO L140 encePairwiseOnDemand]: 40/53 looper letters, 102 selfloop transitions, 31 changer transitions 0/140 dead transitions. [2024-06-27 20:00:36,936 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 84 places, 140 transitions, 1122 flow [2024-06-27 20:00:36,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 20:00:36,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 20:00:36,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 188 transitions. [2024-06-27 20:00:36,937 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5067385444743935 [2024-06-27 20:00:36,938 INFO L175 Difference]: Start difference. First operand has 78 places, 89 transitions, 588 flow. Second operand 7 states and 188 transitions. [2024-06-27 20:00:36,938 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 84 places, 140 transitions, 1122 flow [2024-06-27 20:00:36,968 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 81 places, 140 transitions, 1060 flow, removed 21 selfloop flow, removed 3 redundant places. [2024-06-27 20:00:36,970 INFO L231 Difference]: Finished difference. Result has 83 places, 101 transitions, 736 flow [2024-06-27 20:00:36,970 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=526, PETRI_DIFFERENCE_MINUEND_PLACES=75, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=89, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=736, PETRI_PLACES=83, PETRI_TRANSITIONS=101} [2024-06-27 20:00:36,971 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 27 predicate places. [2024-06-27 20:00:36,971 INFO L495 AbstractCegarLoop]: Abstraction has has 83 places, 101 transitions, 736 flow [2024-06-27 20:00:36,971 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) [2024-06-27 20:00:36,971 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:00:36,972 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:00:36,972 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-06-27 20:00:36,972 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)] === [2024-06-27 20:00:36,972 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:00:36,972 INFO L85 PathProgramCache]: Analyzing trace with hash -1662196636, now seen corresponding path program 2 times [2024-06-27 20:00:36,972 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:00:36,973 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [101176226] [2024-06-27 20:00:36,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:00:36,973 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:00:36,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:00:37,825 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:00:37,826 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:00:37,826 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [101176226] [2024-06-27 20:00:37,826 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [101176226] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:00:37,826 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:00:37,826 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 20:00:37,826 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1991411584] [2024-06-27 20:00:37,826 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:00:37,826 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 20:00:37,827 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:00:37,827 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 20:00:37,827 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-27 20:00:37,984 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 53 [2024-06-27 20:00:37,985 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 83 places, 101 transitions, 736 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) [2024-06-27 20:00:37,985 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:00:37,985 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 53 [2024-06-27 20:00:37,985 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:00:39,566 INFO L124 PetriNetUnfolderBase]: 11742/16408 cut-off events. [2024-06-27 20:00:39,566 INFO L125 PetriNetUnfolderBase]: For 141414/141414 co-relation queries the response was YES. [2024-06-27 20:00:39,619 INFO L83 FinitePrefix]: Finished finitePrefix Result has 73514 conditions, 16408 events. 11742/16408 cut-off events. For 141414/141414 co-relation queries the response was YES. Maximal size of possible extension queue 561. Compared 91648 event pairs, 5695 based on Foata normal form. 6/16385 useless extension candidates. Maximal degree in co-relation 73486. Up to 15831 conditions per place. [2024-06-27 20:00:39,691 INFO L140 encePairwiseOnDemand]: 40/53 looper letters, 112 selfloop transitions, 18 changer transitions 0/137 dead transitions. [2024-06-27 20:00:39,692 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 89 places, 137 transitions, 1136 flow [2024-06-27 20:00:39,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 20:00:39,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 20:00:39,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 177 transitions. [2024-06-27 20:00:39,693 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.477088948787062 [2024-06-27 20:00:39,693 INFO L175 Difference]: Start difference. First operand has 83 places, 101 transitions, 736 flow. Second operand 7 states and 177 transitions. [2024-06-27 20:00:39,693 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 89 places, 137 transitions, 1136 flow [2024-06-27 20:00:39,746 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 87 places, 137 transitions, 1089 flow, removed 20 selfloop flow, removed 2 redundant places. [2024-06-27 20:00:39,748 INFO L231 Difference]: Finished difference. Result has 88 places, 105 transitions, 800 flow [2024-06-27 20:00:39,748 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=689, PETRI_DIFFERENCE_MINUEND_PLACES=81, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=101, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=83, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=800, PETRI_PLACES=88, PETRI_TRANSITIONS=105} [2024-06-27 20:00:39,749 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 32 predicate places. [2024-06-27 20:00:39,749 INFO L495 AbstractCegarLoop]: Abstraction has has 88 places, 105 transitions, 800 flow [2024-06-27 20:00:39,749 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) [2024-06-27 20:00:39,749 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:00:39,749 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:00:39,749 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-06-27 20:00:39,749 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)] === [2024-06-27 20:00:39,750 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:00:39,750 INFO L85 PathProgramCache]: Analyzing trace with hash -1355293272, now seen corresponding path program 3 times [2024-06-27 20:00:39,750 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:00:39,750 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [484382583] [2024-06-27 20:00:39,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:00:39,750 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:00:39,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:00:40,587 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:00:40,587 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:00:40,587 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [484382583] [2024-06-27 20:00:40,587 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [484382583] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:00:40,587 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:00:40,588 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 20:00:40,588 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [746571828] [2024-06-27 20:00:40,588 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:00:40,588 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 20:00:40,588 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:00:40,588 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 20:00:40,588 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 20:00:40,700 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 53 [2024-06-27 20:00:40,700 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 88 places, 105 transitions, 800 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) [2024-06-27 20:00:40,700 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:00:40,700 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 53 [2024-06-27 20:00:40,700 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:00:42,289 INFO L124 PetriNetUnfolderBase]: 11724/16384 cut-off events. [2024-06-27 20:00:42,290 INFO L125 PetriNetUnfolderBase]: For 155649/155649 co-relation queries the response was YES. [2024-06-27 20:00:42,348 INFO L83 FinitePrefix]: Finished finitePrefix Result has 74613 conditions, 16384 events. 11724/16384 cut-off events. For 155649/155649 co-relation queries the response was YES. Maximal size of possible extension queue 561. Compared 91480 event pairs, 5692 based on Foata normal form. 6/16361 useless extension candidates. Maximal degree in co-relation 74582. Up to 15762 conditions per place. [2024-06-27 20:00:42,419 INFO L140 encePairwiseOnDemand]: 40/53 looper letters, 106 selfloop transitions, 25 changer transitions 0/138 dead transitions. [2024-06-27 20:00:42,419 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 94 places, 138 transitions, 1150 flow [2024-06-27 20:00:42,420 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 20:00:42,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 20:00:42,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 180 transitions. [2024-06-27 20:00:42,420 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48517520215633425 [2024-06-27 20:00:42,421 INFO L175 Difference]: Start difference. First operand has 88 places, 105 transitions, 800 flow. Second operand 7 states and 180 transitions. [2024-06-27 20:00:42,421 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 94 places, 138 transitions, 1150 flow [2024-06-27 20:00:42,494 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 89 places, 138 transitions, 1047 flow, removed 33 selfloop flow, removed 5 redundant places. [2024-06-27 20:00:42,495 INFO L231 Difference]: Finished difference. Result has 90 places, 105 transitions, 758 flow [2024-06-27 20:00:42,495 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=697, PETRI_DIFFERENCE_MINUEND_PLACES=83, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=105, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=80, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=758, PETRI_PLACES=90, PETRI_TRANSITIONS=105} [2024-06-27 20:00:42,497 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 34 predicate places. [2024-06-27 20:00:42,497 INFO L495 AbstractCegarLoop]: Abstraction has has 90 places, 105 transitions, 758 flow [2024-06-27 20:00:42,497 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) [2024-06-27 20:00:42,497 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:00:42,498 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:00:42,498 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-06-27 20:00:42,498 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-27 20:00:42,498 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:00:42,498 INFO L85 PathProgramCache]: Analyzing trace with hash 956142936, now seen corresponding path program 3 times [2024-06-27 20:00:42,498 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:00:42,499 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [802679726] [2024-06-27 20:00:42,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:00:42,499 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:00:42,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:00:43,330 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:00:43,331 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:00:43,331 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [802679726] [2024-06-27 20:00:43,331 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [802679726] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:00:43,331 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:00:43,331 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 20:00:43,331 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1617228892] [2024-06-27 20:00:43,331 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:00:43,331 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 20:00:43,331 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:00:43,332 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 20:00:43,332 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 20:00:43,442 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 53 [2024-06-27 20:00:43,443 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 90 places, 105 transitions, 758 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) [2024-06-27 20:00:43,443 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:00:43,443 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 53 [2024-06-27 20:00:43,443 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:00:45,052 INFO L124 PetriNetUnfolderBase]: 11715/16372 cut-off events. [2024-06-27 20:00:45,053 INFO L125 PetriNetUnfolderBase]: For 169130/169130 co-relation queries the response was YES. [2024-06-27 20:00:45,113 INFO L83 FinitePrefix]: Finished finitePrefix Result has 75630 conditions, 16372 events. 11715/16372 cut-off events. For 169130/169130 co-relation queries the response was YES. Maximal size of possible extension queue 561. Compared 91524 event pairs, 5692 based on Foata normal form. 3/16346 useless extension candidates. Maximal degree in co-relation 75599. Up to 15810 conditions per place. [2024-06-27 20:00:45,183 INFO L140 encePairwiseOnDemand]: 41/53 looper letters, 111 selfloop transitions, 18 changer transitions 0/136 dead transitions. [2024-06-27 20:00:45,184 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 96 places, 136 transitions, 1096 flow [2024-06-27 20:00:45,184 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 20:00:45,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 20:00:45,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 176 transitions. [2024-06-27 20:00:45,185 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4743935309973046 [2024-06-27 20:00:45,185 INFO L175 Difference]: Start difference. First operand has 90 places, 105 transitions, 758 flow. Second operand 7 states and 176 transitions. [2024-06-27 20:00:45,185 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 96 places, 136 transitions, 1096 flow [2024-06-27 20:00:45,264 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 90 places, 136 transitions, 981 flow, removed 26 selfloop flow, removed 6 redundant places. [2024-06-27 20:00:45,266 INFO L231 Difference]: Finished difference. Result has 91 places, 105 transitions, 690 flow [2024-06-27 20:00:45,266 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=643, PETRI_DIFFERENCE_MINUEND_PLACES=84, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=105, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=87, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=690, PETRI_PLACES=91, PETRI_TRANSITIONS=105} [2024-06-27 20:00:45,266 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 35 predicate places. [2024-06-27 20:00:45,266 INFO L495 AbstractCegarLoop]: Abstraction has has 91 places, 105 transitions, 690 flow [2024-06-27 20:00:45,267 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) [2024-06-27 20:00:45,267 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:00:45,267 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:00:45,267 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-06-27 20:00:45,267 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-27 20:00:45,267 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:00:45,267 INFO L85 PathProgramCache]: Analyzing trace with hash -1764043876, now seen corresponding path program 1 times [2024-06-27 20:00:45,268 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:00:45,268 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1167845593] [2024-06-27 20:00:45,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:00:45,268 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:00:45,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:00:45,828 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:00:45,828 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:00:45,828 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1167845593] [2024-06-27 20:00:45,829 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1167845593] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:00:45,829 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:00:45,829 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 20:00:45,829 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1328022125] [2024-06-27 20:00:45,829 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:00:45,829 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 20:00:45,829 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:00:45,830 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 20:00:45,830 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-06-27 20:00:45,905 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 53 [2024-06-27 20:00:45,905 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 91 places, 105 transitions, 690 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) [2024-06-27 20:00:45,905 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:00:45,905 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 53 [2024-06-27 20:00:45,905 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:00:47,660 INFO L124 PetriNetUnfolderBase]: 12579/18275 cut-off events. [2024-06-27 20:00:47,660 INFO L125 PetriNetUnfolderBase]: For 203122/203122 co-relation queries the response was YES. [2024-06-27 20:00:47,718 INFO L83 FinitePrefix]: Finished finitePrefix Result has 82527 conditions, 18275 events. 12579/18275 cut-off events. For 203122/203122 co-relation queries the response was YES. Maximal size of possible extension queue 654. Compared 109326 event pairs, 6688 based on Foata normal form. 4/18276 useless extension candidates. Maximal degree in co-relation 82495. Up to 16950 conditions per place. [2024-06-27 20:00:47,791 INFO L140 encePairwiseOnDemand]: 44/53 looper letters, 94 selfloop transitions, 10 changer transitions 0/124 dead transitions. [2024-06-27 20:00:47,792 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 95 places, 124 transitions, 978 flow [2024-06-27 20:00:47,792 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 20:00:47,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 20:00:47,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 129 transitions. [2024-06-27 20:00:47,793 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4867924528301887 [2024-06-27 20:00:47,793 INFO L175 Difference]: Start difference. First operand has 91 places, 105 transitions, 690 flow. Second operand 5 states and 129 transitions. [2024-06-27 20:00:47,793 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 95 places, 124 transitions, 978 flow [2024-06-27 20:00:47,894 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 89 places, 124 transitions, 919 flow, removed 6 selfloop flow, removed 6 redundant places. [2024-06-27 20:00:47,896 INFO L231 Difference]: Finished difference. Result has 90 places, 109 transitions, 710 flow [2024-06-27 20:00:47,896 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=631, PETRI_DIFFERENCE_MINUEND_PLACES=85, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=105, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=95, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=710, PETRI_PLACES=90, PETRI_TRANSITIONS=109} [2024-06-27 20:00:47,897 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 34 predicate places. [2024-06-27 20:00:47,897 INFO L495 AbstractCegarLoop]: Abstraction has has 90 places, 109 transitions, 710 flow [2024-06-27 20:00:47,897 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) [2024-06-27 20:00:47,897 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:00:47,897 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:00:47,897 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-06-27 20:00:47,897 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)] === [2024-06-27 20:00:47,898 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:00:47,898 INFO L85 PathProgramCache]: Analyzing trace with hash 289214063, now seen corresponding path program 1 times [2024-06-27 20:00:47,898 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:00:47,898 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [264049449] [2024-06-27 20:00:47,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:00:47,898 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:00:47,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:00:49,016 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:00:49,016 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:00:49,016 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [264049449] [2024-06-27 20:00:49,016 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [264049449] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:00:49,017 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:00:49,017 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:00:49,017 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [629875329] [2024-06-27 20:00:49,017 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:00:49,017 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:00:49,017 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:00:49,017 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:00:49,017 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:00:49,200 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 53 [2024-06-27 20:00:49,200 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 90 places, 109 transitions, 710 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) [2024-06-27 20:00:49,200 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:00:49,200 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 53 [2024-06-27 20:00:49,201 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:00:51,026 INFO L124 PetriNetUnfolderBase]: 11754/16699 cut-off events. [2024-06-27 20:00:51,026 INFO L125 PetriNetUnfolderBase]: For 202858/202858 co-relation queries the response was YES. [2024-06-27 20:00:51,069 INFO L83 FinitePrefix]: Finished finitePrefix Result has 80958 conditions, 16699 events. 11754/16699 cut-off events. For 202858/202858 co-relation queries the response was YES. Maximal size of possible extension queue 576. Compared 95163 event pairs, 5550 based on Foata normal form. 3/16699 useless extension candidates. Maximal degree in co-relation 80925. Up to 15798 conditions per place. [2024-06-27 20:00:51,134 INFO L140 encePairwiseOnDemand]: 40/53 looper letters, 137 selfloop transitions, 30 changer transitions 0/174 dead transitions. [2024-06-27 20:00:51,134 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 98 places, 174 transitions, 1398 flow [2024-06-27 20:00:51,135 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:00:51,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:00:51,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 237 transitions. [2024-06-27 20:00:51,136 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4968553459119497 [2024-06-27 20:00:51,136 INFO L175 Difference]: Start difference. First operand has 90 places, 109 transitions, 710 flow. Second operand 9 states and 237 transitions. [2024-06-27 20:00:51,136 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 98 places, 174 transitions, 1398 flow [2024-06-27 20:00:51,201 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 95 places, 174 transitions, 1349 flow, removed 17 selfloop flow, removed 3 redundant places. [2024-06-27 20:00:51,203 INFO L231 Difference]: Finished difference. Result has 96 places, 117 transitions, 860 flow [2024-06-27 20:00:51,203 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=661, PETRI_DIFFERENCE_MINUEND_PLACES=87, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=109, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=83, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=860, PETRI_PLACES=96, PETRI_TRANSITIONS=117} [2024-06-27 20:00:51,203 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 40 predicate places. [2024-06-27 20:00:51,204 INFO L495 AbstractCegarLoop]: Abstraction has has 96 places, 117 transitions, 860 flow [2024-06-27 20:00:51,204 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) [2024-06-27 20:00:51,204 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:00:51,204 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:00:51,204 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-06-27 20:00:51,204 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)] === [2024-06-27 20:00:51,205 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:00:51,205 INFO L85 PathProgramCache]: Analyzing trace with hash -1912444964, now seen corresponding path program 1 times [2024-06-27 20:00:51,205 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:00:51,205 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [638233814] [2024-06-27 20:00:51,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:00:51,205 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:00:51,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:00:52,169 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:00:52,169 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:00:52,169 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [638233814] [2024-06-27 20:00:52,169 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [638233814] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:00:52,169 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:00:52,169 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:00:52,170 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1836889792] [2024-06-27 20:00:52,170 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:00:52,170 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:00:52,170 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:00:52,171 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:00:52,171 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:00:52,313 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 53 [2024-06-27 20:00:52,313 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 96 places, 117 transitions, 860 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) [2024-06-27 20:00:52,313 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:00:52,313 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 53 [2024-06-27 20:00:52,313 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:00:54,227 INFO L124 PetriNetUnfolderBase]: 11798/16706 cut-off events. [2024-06-27 20:00:54,227 INFO L125 PetriNetUnfolderBase]: For 238063/238063 co-relation queries the response was YES. [2024-06-27 20:00:54,266 INFO L83 FinitePrefix]: Finished finitePrefix Result has 85098 conditions, 16706 events. 11798/16706 cut-off events. For 238063/238063 co-relation queries the response was YES. Maximal size of possible extension queue 575. Compared 94820 event pairs, 5466 based on Foata normal form. 6/16709 useless extension candidates. Maximal degree in co-relation 85064. Up to 15882 conditions per place. [2024-06-27 20:00:54,333 INFO L140 encePairwiseOnDemand]: 40/53 looper letters, 137 selfloop transitions, 22 changer transitions 0/166 dead transitions. [2024-06-27 20:00:54,333 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 103 places, 166 transitions, 1360 flow [2024-06-27 20:00:54,334 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:00:54,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:00:54,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 207 transitions. [2024-06-27 20:00:54,334 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4882075471698113 [2024-06-27 20:00:54,335 INFO L175 Difference]: Start difference. First operand has 96 places, 117 transitions, 860 flow. Second operand 8 states and 207 transitions. [2024-06-27 20:00:54,335 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 103 places, 166 transitions, 1360 flow [2024-06-27 20:00:54,439 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 98 places, 166 transitions, 1270 flow, removed 34 selfloop flow, removed 5 redundant places. [2024-06-27 20:00:54,441 INFO L231 Difference]: Finished difference. Result has 99 places, 121 transitions, 897 flow [2024-06-27 20:00:54,441 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=770, PETRI_DIFFERENCE_MINUEND_PLACES=91, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=117, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=95, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=897, PETRI_PLACES=99, PETRI_TRANSITIONS=121} [2024-06-27 20:00:54,442 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 43 predicate places. [2024-06-27 20:00:54,442 INFO L495 AbstractCegarLoop]: Abstraction has has 99 places, 121 transitions, 897 flow [2024-06-27 20:00:54,442 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) [2024-06-27 20:00:54,442 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:00:54,442 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:00:54,443 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-06-27 20:00:54,443 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)] === [2024-06-27 20:00:54,443 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:00:54,443 INFO L85 PathProgramCache]: Analyzing trace with hash -260677397, now seen corresponding path program 2 times [2024-06-27 20:00:54,444 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:00:54,444 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1909077673] [2024-06-27 20:00:54,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:00:54,444 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:00:54,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:00:55,788 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:00:55,788 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:00:55,788 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1909077673] [2024-06-27 20:00:55,788 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1909077673] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:00:55,789 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:00:55,789 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:00:55,789 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [703509400] [2024-06-27 20:00:55,789 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:00:55,789 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:00:55,789 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:00:55,789 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:00:55,789 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:00:55,911 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 53 [2024-06-27 20:00:55,912 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 99 places, 121 transitions, 897 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) [2024-06-27 20:00:55,912 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:00:55,912 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 53 [2024-06-27 20:00:55,912 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:00:57,899 INFO L124 PetriNetUnfolderBase]: 11789/16701 cut-off events. [2024-06-27 20:00:57,899 INFO L125 PetriNetUnfolderBase]: For 268108/268108 co-relation queries the response was YES. [2024-06-27 20:00:57,942 INFO L83 FinitePrefix]: Finished finitePrefix Result has 88776 conditions, 16701 events. 11789/16701 cut-off events. For 268108/268108 co-relation queries the response was YES. Maximal size of possible extension queue 575. Compared 94948 event pairs, 5473 based on Foata normal form. 3/16699 useless extension candidates. Maximal degree in co-relation 88740. Up to 15885 conditions per place. [2024-06-27 20:00:58,012 INFO L140 encePairwiseOnDemand]: 40/53 looper letters, 136 selfloop transitions, 22 changer transitions 0/165 dead transitions. [2024-06-27 20:00:58,012 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 106 places, 165 transitions, 1327 flow [2024-06-27 20:00:58,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:00:58,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:00:58,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 206 transitions. [2024-06-27 20:00:58,014 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4858490566037736 [2024-06-27 20:00:58,014 INFO L175 Difference]: Start difference. First operand has 99 places, 121 transitions, 897 flow. Second operand 8 states and 206 transitions. [2024-06-27 20:00:58,014 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 106 places, 165 transitions, 1327 flow [2024-06-27 20:00:58,096 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 100 places, 165 transitions, 1202 flow, removed 43 selfloop flow, removed 6 redundant places. [2024-06-27 20:00:58,098 INFO L231 Difference]: Finished difference. Result has 101 places, 121 transitions, 827 flow [2024-06-27 20:00:58,098 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=772, PETRI_DIFFERENCE_MINUEND_PLACES=93, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=121, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=99, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=827, PETRI_PLACES=101, PETRI_TRANSITIONS=121} [2024-06-27 20:00:58,098 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 45 predicate places. [2024-06-27 20:00:58,099 INFO L495 AbstractCegarLoop]: Abstraction has has 101 places, 121 transitions, 827 flow [2024-06-27 20:00:58,099 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) [2024-06-27 20:00:58,099 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:00:58,099 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:00:58,099 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-06-27 20:00:58,099 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)] === [2024-06-27 20:00:58,100 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:00:58,100 INFO L85 PathProgramCache]: Analyzing trace with hash -192767971, now seen corresponding path program 3 times [2024-06-27 20:00:58,100 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:00:58,100 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2012611447] [2024-06-27 20:00:58,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:00:58,100 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:00:58,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:00:59,228 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:00:59,228 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:00:59,228 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2012611447] [2024-06-27 20:00:59,228 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2012611447] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:00:59,228 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:00:59,228 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:00:59,228 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [169652882] [2024-06-27 20:00:59,228 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:00:59,229 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:00:59,229 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:00:59,229 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:00:59,229 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:00:59,421 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 53 [2024-06-27 20:00:59,421 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 101 places, 121 transitions, 827 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) [2024-06-27 20:00:59,421 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:00:59,421 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 53 [2024-06-27 20:00:59,421 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:01:01,230 INFO L124 PetriNetUnfolderBase]: 11811/16733 cut-off events. [2024-06-27 20:01:01,230 INFO L125 PetriNetUnfolderBase]: For 289883/289888 co-relation queries the response was YES. [2024-06-27 20:01:01,297 INFO L83 FinitePrefix]: Finished finitePrefix Result has 89975 conditions, 16733 events. 11811/16733 cut-off events. For 289883/289888 co-relation queries the response was YES. Maximal size of possible extension queue 575. Compared 95083 event pairs, 5480 based on Foata normal form. 7/16734 useless extension candidates. Maximal degree in co-relation 89938. Up to 15840 conditions per place. [2024-06-27 20:01:01,553 INFO L140 encePairwiseOnDemand]: 40/53 looper letters, 120 selfloop transitions, 39 changer transitions 0/166 dead transitions. [2024-06-27 20:01:01,554 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 108 places, 166 transitions, 1323 flow [2024-06-27 20:01:01,554 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:01:01,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:01:01,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 207 transitions. [2024-06-27 20:01:01,555 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4882075471698113 [2024-06-27 20:01:01,555 INFO L175 Difference]: Start difference. First operand has 101 places, 121 transitions, 827 flow. Second operand 8 states and 207 transitions. [2024-06-27 20:01:01,555 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 108 places, 166 transitions, 1323 flow [2024-06-27 20:01:01,631 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 101 places, 166 transitions, 1268 flow, removed 3 selfloop flow, removed 7 redundant places. [2024-06-27 20:01:01,632 INFO L231 Difference]: Finished difference. Result has 102 places, 125 transitions, 941 flow [2024-06-27 20:01:01,633 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=772, PETRI_DIFFERENCE_MINUEND_PLACES=94, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=121, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=82, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=941, PETRI_PLACES=102, PETRI_TRANSITIONS=125} [2024-06-27 20:01:01,633 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 46 predicate places. [2024-06-27 20:01:01,633 INFO L495 AbstractCegarLoop]: Abstraction has has 102 places, 125 transitions, 941 flow [2024-06-27 20:01:01,633 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) [2024-06-27 20:01:01,634 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:01:01,634 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:01:01,634 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-06-27 20:01:01,634 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)] === [2024-06-27 20:01:01,635 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:01:01,635 INFO L85 PathProgramCache]: Analyzing trace with hash -260533092, now seen corresponding path program 2 times [2024-06-27 20:01:01,635 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:01:01,635 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1251107597] [2024-06-27 20:01:01,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:01:01,635 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:01:01,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:01:02,625 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:01:02,625 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:01:02,625 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1251107597] [2024-06-27 20:01:02,625 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1251107597] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:01:02,625 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:01:02,625 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:01:02,625 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1144501978] [2024-06-27 20:01:02,625 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:01:02,626 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:01:02,626 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:01:02,626 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:01:02,626 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:01:02,746 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 53 [2024-06-27 20:01:02,746 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 102 places, 125 transitions, 941 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) [2024-06-27 20:01:02,746 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:01:02,746 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 53 [2024-06-27 20:01:02,746 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:01:04,534 INFO L124 PetriNetUnfolderBase]: 11948/16916 cut-off events. [2024-06-27 20:01:04,534 INFO L125 PetriNetUnfolderBase]: For 330825/330827 co-relation queries the response was YES. [2024-06-27 20:01:04,611 INFO L83 FinitePrefix]: Finished finitePrefix Result has 95294 conditions, 16916 events. 11948/16916 cut-off events. For 330825/330827 co-relation queries the response was YES. Maximal size of possible extension queue 575. Compared 96061 event pairs, 5292 based on Foata normal form. 6/16914 useless extension candidates. Maximal degree in co-relation 95256. Up to 15758 conditions per place. [2024-06-27 20:01:04,698 INFO L140 encePairwiseOnDemand]: 39/53 looper letters, 121 selfloop transitions, 60 changer transitions 0/188 dead transitions. [2024-06-27 20:01:04,698 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 109 places, 188 transitions, 1889 flow [2024-06-27 20:01:04,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:01:04,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:01:04,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 221 transitions. [2024-06-27 20:01:04,700 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5212264150943396 [2024-06-27 20:01:04,700 INFO L175 Difference]: Start difference. First operand has 102 places, 125 transitions, 941 flow. Second operand 8 states and 221 transitions. [2024-06-27 20:01:04,700 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 109 places, 188 transitions, 1889 flow [2024-06-27 20:01:04,857 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 103 places, 188 transitions, 1752 flow, removed 32 selfloop flow, removed 6 redundant places. [2024-06-27 20:01:04,859 INFO L231 Difference]: Finished difference. Result has 104 places, 137 transitions, 1171 flow [2024-06-27 20:01:04,859 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=804, PETRI_DIFFERENCE_MINUEND_PLACES=96, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=125, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=52, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1171, PETRI_PLACES=104, PETRI_TRANSITIONS=137} [2024-06-27 20:01:04,859 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 48 predicate places. [2024-06-27 20:01:04,859 INFO L495 AbstractCegarLoop]: Abstraction has has 104 places, 137 transitions, 1171 flow [2024-06-27 20:01:04,860 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) [2024-06-27 20:01:04,860 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:01:04,860 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:01:04,860 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-06-27 20:01:04,860 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-27 20:01:04,860 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:01:04,861 INFO L85 PathProgramCache]: Analyzing trace with hash -260527512, now seen corresponding path program 3 times [2024-06-27 20:01:04,861 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:01:04,861 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [473048661] [2024-06-27 20:01:04,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:01:04,861 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:01:04,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:01:05,830 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:01:05,830 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:01:05,830 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [473048661] [2024-06-27 20:01:05,831 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [473048661] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:01:05,831 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:01:05,831 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:01:05,831 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [8998948] [2024-06-27 20:01:05,831 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:01:05,831 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:01:05,832 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:01:05,832 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:01:05,832 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:01:06,002 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 53 [2024-06-27 20:01:06,002 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 104 places, 137 transitions, 1171 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) [2024-06-27 20:01:06,002 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:01:06,002 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 53 [2024-06-27 20:01:06,002 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:01:07,905 INFO L124 PetriNetUnfolderBase]: 11930/16892 cut-off events. [2024-06-27 20:01:07,905 INFO L125 PetriNetUnfolderBase]: For 369899/369901 co-relation queries the response was YES. [2024-06-27 20:01:07,969 INFO L83 FinitePrefix]: Finished finitePrefix Result has 98911 conditions, 16892 events. 11930/16892 cut-off events. For 369899/369901 co-relation queries the response was YES. Maximal size of possible extension queue 575. Compared 95961 event pairs, 5292 based on Foata normal form. 6/16890 useless extension candidates. Maximal degree in co-relation 98872. Up to 15743 conditions per place. [2024-06-27 20:01:08,050 INFO L140 encePairwiseOnDemand]: 39/53 looper letters, 116 selfloop transitions, 61 changer transitions 0/184 dead transitions. [2024-06-27 20:01:08,051 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 111 places, 184 transitions, 1767 flow [2024-06-27 20:01:08,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:01:08,052 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:01:08,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 216 transitions. [2024-06-27 20:01:08,053 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5094339622641509 [2024-06-27 20:01:08,053 INFO L175 Difference]: Start difference. First operand has 104 places, 137 transitions, 1171 flow. Second operand 8 states and 216 transitions. [2024-06-27 20:01:08,053 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 111 places, 184 transitions, 1767 flow [2024-06-27 20:01:08,256 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 108 places, 184 transitions, 1608 flow, removed 65 selfloop flow, removed 3 redundant places. [2024-06-27 20:01:08,260 INFO L231 Difference]: Finished difference. Result has 109 places, 137 transitions, 1145 flow [2024-06-27 20:01:08,260 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=1012, PETRI_DIFFERENCE_MINUEND_PLACES=101, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=137, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=61, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=76, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1145, PETRI_PLACES=109, PETRI_TRANSITIONS=137} [2024-06-27 20:01:08,260 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 53 predicate places. [2024-06-27 20:01:08,260 INFO L495 AbstractCegarLoop]: Abstraction has has 109 places, 137 transitions, 1145 flow [2024-06-27 20:01:08,261 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) [2024-06-27 20:01:08,261 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:01:08,261 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:01:08,261 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-06-27 20:01:08,261 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)] === [2024-06-27 20:01:08,261 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:01:08,261 INFO L85 PathProgramCache]: Analyzing trace with hash 11512620, now seen corresponding path program 4 times [2024-06-27 20:01:08,261 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:01:08,262 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1945126427] [2024-06-27 20:01:08,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:01:08,262 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:01:08,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:01:09,116 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:01:09,116 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:01:09,116 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1945126427] [2024-06-27 20:01:09,117 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1945126427] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:01:09,117 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:01:09,117 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:01:09,117 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [102523556] [2024-06-27 20:01:09,117 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:01:09,117 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:01:09,117 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:01:09,118 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:01:09,118 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:01:09,229 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 53 [2024-06-27 20:01:09,230 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 109 places, 137 transitions, 1145 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) [2024-06-27 20:01:09,230 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:01:09,230 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 53 [2024-06-27 20:01:09,230 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:01:11,194 INFO L124 PetriNetUnfolderBase]: 11974/16953 cut-off events. [2024-06-27 20:01:11,195 INFO L125 PetriNetUnfolderBase]: For 393776/393776 co-relation queries the response was YES. [2024-06-27 20:01:11,261 INFO L83 FinitePrefix]: Finished finitePrefix Result has 100592 conditions, 16953 events. 11974/16953 cut-off events. For 393776/393776 co-relation queries the response was YES. Maximal size of possible extension queue 575. Compared 96316 event pairs, 5492 based on Foata normal form. 6/16954 useless extension candidates. Maximal degree in co-relation 100551. Up to 16111 conditions per place. [2024-06-27 20:01:11,343 INFO L140 encePairwiseOnDemand]: 39/53 looper letters, 152 selfloop transitions, 22 changer transitions 0/181 dead transitions. [2024-06-27 20:01:11,344 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 116 places, 181 transitions, 1691 flow [2024-06-27 20:01:11,344 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:01:11,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:01:11,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 202 transitions. [2024-06-27 20:01:11,349 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47641509433962265 [2024-06-27 20:01:11,349 INFO L175 Difference]: Start difference. First operand has 109 places, 137 transitions, 1145 flow. Second operand 8 states and 202 transitions. [2024-06-27 20:01:11,349 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 116 places, 181 transitions, 1691 flow [2024-06-27 20:01:11,480 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 109 places, 181 transitions, 1550 flow, removed 3 selfloop flow, removed 7 redundant places. [2024-06-27 20:01:11,482 INFO L231 Difference]: Finished difference. Result has 110 places, 141 transitions, 1159 flow [2024-06-27 20:01:11,482 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=1012, PETRI_DIFFERENCE_MINUEND_PLACES=102, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=137, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=115, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1159, PETRI_PLACES=110, PETRI_TRANSITIONS=141} [2024-06-27 20:01:11,482 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 54 predicate places. [2024-06-27 20:01:11,482 INFO L495 AbstractCegarLoop]: Abstraction has has 110 places, 141 transitions, 1159 flow [2024-06-27 20:01:11,483 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) [2024-06-27 20:01:11,483 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:01:11,483 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:01:11,483 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-06-27 20:01:11,483 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)] === [2024-06-27 20:01:11,483 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:01:11,483 INFO L85 PathProgramCache]: Analyzing trace with hash 935582312, now seen corresponding path program 5 times [2024-06-27 20:01:11,484 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:01:11,484 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1203755603] [2024-06-27 20:01:11,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:01:11,484 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:01:11,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:01:12,419 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:01:12,419 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:01:12,419 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1203755603] [2024-06-27 20:01:12,419 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1203755603] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:01:12,419 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:01:12,419 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:01:12,419 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1994103084] [2024-06-27 20:01:12,419 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:01:12,420 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:01:12,420 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:01:12,420 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:01:12,420 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:01:12,565 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 53 [2024-06-27 20:01:12,565 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 110 places, 141 transitions, 1159 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) [2024-06-27 20:01:12,565 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:01:12,565 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 53 [2024-06-27 20:01:12,565 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:01:14,759 INFO L124 PetriNetUnfolderBase]: 12018/17021 cut-off events. [2024-06-27 20:01:14,760 INFO L125 PetriNetUnfolderBase]: For 421299/421299 co-relation queries the response was YES. [2024-06-27 20:01:14,826 INFO L83 FinitePrefix]: Finished finitePrefix Result has 102080 conditions, 17021 events. 12018/17021 cut-off events. For 421299/421299 co-relation queries the response was YES. Maximal size of possible extension queue 575. Compared 96619 event pairs, 5492 based on Foata normal form. 6/17022 useless extension candidates. Maximal degree in co-relation 102038. Up to 16034 conditions per place. [2024-06-27 20:01:14,910 INFO L140 encePairwiseOnDemand]: 39/53 looper letters, 143 selfloop transitions, 39 changer transitions 0/189 dead transitions. [2024-06-27 20:01:14,911 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 117 places, 189 transitions, 1861 flow [2024-06-27 20:01:14,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:01:14,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:01:14,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 210 transitions. [2024-06-27 20:01:14,912 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49528301886792453 [2024-06-27 20:01:14,912 INFO L175 Difference]: Start difference. First operand has 110 places, 141 transitions, 1159 flow. Second operand 8 states and 210 transitions. [2024-06-27 20:01:14,912 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 117 places, 189 transitions, 1861 flow [2024-06-27 20:01:15,129 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 111 places, 189 transitions, 1754 flow, removed 34 selfloop flow, removed 6 redundant places. [2024-06-27 20:01:15,132 INFO L231 Difference]: Finished difference. Result has 112 places, 145 transitions, 1233 flow [2024-06-27 20:01:15,132 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=1052, PETRI_DIFFERENCE_MINUEND_PLACES=104, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=141, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=106, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1233, PETRI_PLACES=112, PETRI_TRANSITIONS=145} [2024-06-27 20:01:15,133 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 56 predicate places. [2024-06-27 20:01:15,133 INFO L495 AbstractCegarLoop]: Abstraction has has 112 places, 145 transitions, 1233 flow [2024-06-27 20:01:15,133 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) [2024-06-27 20:01:15,133 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:01:15,134 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:01:15,134 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-06-27 20:01:15,134 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)] === [2024-06-27 20:01:15,134 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:01:15,134 INFO L85 PathProgramCache]: Analyzing trace with hash 935576732, now seen corresponding path program 6 times [2024-06-27 20:01:15,134 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:01:15,134 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [870390465] [2024-06-27 20:01:15,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:01:15,135 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:01:15,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:01:15,965 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:01:15,965 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:01:15,965 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [870390465] [2024-06-27 20:01:15,966 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [870390465] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:01:15,966 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:01:15,966 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:01:15,966 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1962126311] [2024-06-27 20:01:15,966 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:01:15,966 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:01:15,966 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:01:15,967 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:01:15,967 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:01:16,101 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 53 [2024-06-27 20:01:16,102 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 112 places, 145 transitions, 1233 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) [2024-06-27 20:01:16,102 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:01:16,102 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 53 [2024-06-27 20:01:16,102 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:01:18,277 INFO L124 PetriNetUnfolderBase]: 12000/16997 cut-off events. [2024-06-27 20:01:18,278 INFO L125 PetriNetUnfolderBase]: For 445289/445289 co-relation queries the response was YES. [2024-06-27 20:01:18,359 INFO L83 FinitePrefix]: Finished finitePrefix Result has 102918 conditions, 16997 events. 12000/16997 cut-off events. For 445289/445289 co-relation queries the response was YES. Maximal size of possible extension queue 575. Compared 96559 event pairs, 5481 based on Foata normal form. 6/16998 useless extension candidates. Maximal degree in co-relation 102875. Up to 16019 conditions per place. [2024-06-27 20:01:18,446 INFO L140 encePairwiseOnDemand]: 39/53 looper letters, 139 selfloop transitions, 40 changer transitions 0/186 dead transitions. [2024-06-27 20:01:18,446 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 119 places, 186 transitions, 1701 flow [2024-06-27 20:01:18,446 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:01:18,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:01:18,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 206 transitions. [2024-06-27 20:01:18,447 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4858490566037736 [2024-06-27 20:01:18,447 INFO L175 Difference]: Start difference. First operand has 112 places, 145 transitions, 1233 flow. Second operand 8 states and 206 transitions. [2024-06-27 20:01:18,447 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 119 places, 186 transitions, 1701 flow [2024-06-27 20:01:18,679 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 113 places, 186 transitions, 1459 flow, removed 73 selfloop flow, removed 6 redundant places. [2024-06-27 20:01:18,681 INFO L231 Difference]: Finished difference. Result has 114 places, 145 transitions, 1082 flow [2024-06-27 20:01:18,682 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=991, PETRI_DIFFERENCE_MINUEND_PLACES=106, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=145, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=105, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1082, PETRI_PLACES=114, PETRI_TRANSITIONS=145} [2024-06-27 20:01:18,682 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 58 predicate places. [2024-06-27 20:01:18,682 INFO L495 AbstractCegarLoop]: Abstraction has has 114 places, 145 transitions, 1082 flow [2024-06-27 20:01:18,682 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) [2024-06-27 20:01:18,683 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:01:18,683 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:01:18,683 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-06-27 20:01:18,683 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-27 20:01:18,683 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:01:18,683 INFO L85 PathProgramCache]: Analyzing trace with hash 6533819, now seen corresponding path program 4 times [2024-06-27 20:01:18,684 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:01:18,684 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1823034238] [2024-06-27 20:01:18,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:01:18,684 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:01:18,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:01:19,666 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:01:19,666 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:01:19,666 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1823034238] [2024-06-27 20:01:19,666 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1823034238] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:01:19,667 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:01:19,667 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:01:19,667 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1998632894] [2024-06-27 20:01:19,667 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:01:19,667 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:01:19,667 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:01:19,668 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:01:19,668 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:01:19,802 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 53 [2024-06-27 20:01:19,802 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 114 places, 145 transitions, 1082 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) [2024-06-27 20:01:19,802 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:01:19,802 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 53 [2024-06-27 20:01:19,802 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:01:22,193 INFO L124 PetriNetUnfolderBase]: 11991/16985 cut-off events. [2024-06-27 20:01:22,193 INFO L125 PetriNetUnfolderBase]: For 467626/467626 co-relation queries the response was YES. [2024-06-27 20:01:22,264 INFO L83 FinitePrefix]: Finished finitePrefix Result has 103464 conditions, 16985 events. 11991/16985 cut-off events. For 467626/467626 co-relation queries the response was YES. Maximal size of possible extension queue 575. Compared 96466 event pairs, 5497 based on Foata normal form. 3/16983 useless extension candidates. Maximal degree in co-relation 103420. Up to 16173 conditions per place. [2024-06-27 20:01:22,359 INFO L140 encePairwiseOnDemand]: 40/53 looper letters, 158 selfloop transitions, 22 changer transitions 0/187 dead transitions. [2024-06-27 20:01:22,360 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 121 places, 187 transitions, 1624 flow [2024-06-27 20:01:22,360 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:01:22,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:01:22,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 200 transitions. [2024-06-27 20:01:22,367 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4716981132075472 [2024-06-27 20:01:22,367 INFO L175 Difference]: Start difference. First operand has 114 places, 145 transitions, 1082 flow. Second operand 8 states and 200 transitions. [2024-06-27 20:01:22,368 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 121 places, 187 transitions, 1624 flow [2024-06-27 20:01:22,579 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 114 places, 187 transitions, 1533 flow, removed 3 selfloop flow, removed 7 redundant places. [2024-06-27 20:01:22,581 INFO L231 Difference]: Finished difference. Result has 115 places, 149 transitions, 1138 flow [2024-06-27 20:01:22,582 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=991, PETRI_DIFFERENCE_MINUEND_PLACES=107, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=145, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=123, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1138, PETRI_PLACES=115, PETRI_TRANSITIONS=149} [2024-06-27 20:01:22,582 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 59 predicate places. [2024-06-27 20:01:22,582 INFO L495 AbstractCegarLoop]: Abstraction has has 115 places, 149 transitions, 1138 flow [2024-06-27 20:01:22,582 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) [2024-06-27 20:01:22,583 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:01:22,583 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:01:22,583 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-06-27 20:01:22,583 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-27 20:01:22,583 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:01:22,583 INFO L85 PathProgramCache]: Analyzing trace with hash 943211009, now seen corresponding path program 1 times [2024-06-27 20:01:22,584 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:01:22,584 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1305852766] [2024-06-27 20:01:22,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:01:22,595 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:01:22,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:01:24,272 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:01:24,272 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:01:24,272 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1305852766] [2024-06-27 20:01:24,273 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1305852766] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:01:24,273 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:01:24,273 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:01:24,273 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [903459542] [2024-06-27 20:01:24,273 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:01:24,273 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:01:24,274 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:01:24,274 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:01:24,274 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:01:24,449 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 53 [2024-06-27 20:01:24,449 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 115 places, 149 transitions, 1138 flow. Second operand has 10 states, 10 states have (on average 13.3) internal successors, (133), 10 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:01:24,449 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:01:24,449 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 53 [2024-06-27 20:01:24,449 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:01:27,183 INFO L124 PetriNetUnfolderBase]: 14155/19894 cut-off events. [2024-06-27 20:01:27,184 INFO L125 PetriNetUnfolderBase]: For 592355/592355 co-relation queries the response was YES. [2024-06-27 20:01:27,238 INFO L83 FinitePrefix]: Finished finitePrefix Result has 122877 conditions, 19894 events. 14155/19894 cut-off events. For 592355/592355 co-relation queries the response was YES. Maximal size of possible extension queue 650. Compared 112050 event pairs, 6530 based on Foata normal form. 6/19895 useless extension candidates. Maximal degree in co-relation 122832. Up to 19032 conditions per place. [2024-06-27 20:01:27,499 INFO L140 encePairwiseOnDemand]: 41/53 looper letters, 165 selfloop transitions, 24 changer transitions 0/195 dead transitions. [2024-06-27 20:01:27,499 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 122 places, 195 transitions, 1718 flow [2024-06-27 20:01:27,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:01:27,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:01:27,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 194 transitions. [2024-06-27 20:01:27,501 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45754716981132076 [2024-06-27 20:01:27,501 INFO L175 Difference]: Start difference. First operand has 115 places, 149 transitions, 1138 flow. Second operand 8 states and 194 transitions. [2024-06-27 20:01:27,501 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 122 places, 195 transitions, 1718 flow [2024-06-27 20:01:27,737 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 116 places, 195 transitions, 1603 flow, removed 38 selfloop flow, removed 6 redundant places. [2024-06-27 20:01:27,739 INFO L231 Difference]: Finished difference. Result has 118 places, 156 transitions, 1196 flow [2024-06-27 20:01:27,739 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=1023, PETRI_DIFFERENCE_MINUEND_PLACES=109, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=149, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=128, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1196, PETRI_PLACES=118, PETRI_TRANSITIONS=156} [2024-06-27 20:01:27,739 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 62 predicate places. [2024-06-27 20:01:27,740 INFO L495 AbstractCegarLoop]: Abstraction has has 118 places, 156 transitions, 1196 flow [2024-06-27 20:01:27,740 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 13.3) internal successors, (133), 10 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:01:27,740 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:01:27,740 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:01:27,740 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-06-27 20:01:27,740 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-27 20:01:27,741 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:01:27,741 INFO L85 PathProgramCache]: Analyzing trace with hash -1685425719, now seen corresponding path program 1 times [2024-06-27 20:01:27,741 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:01:27,741 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [607461248] [2024-06-27 20:01:27,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:01:27,741 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:01:27,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:01:29,147 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:01:29,147 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:01:29,148 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [607461248] [2024-06-27 20:01:29,150 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [607461248] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:01:29,150 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:01:29,150 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:01:29,150 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [889259040] [2024-06-27 20:01:29,150 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:01:29,152 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:01:29,152 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:01:29,153 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:01:29,153 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:01:29,321 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 53 [2024-06-27 20:01:29,322 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 118 places, 156 transitions, 1196 flow. Second operand has 10 states, 10 states have (on average 14.3) internal successors, (143), 10 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:01:29,322 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:01:29,322 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 53 [2024-06-27 20:01:29,322 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:01:32,076 INFO L124 PetriNetUnfolderBase]: 13895/19576 cut-off events. [2024-06-27 20:01:32,076 INFO L125 PetriNetUnfolderBase]: For 646067/646067 co-relation queries the response was YES. [2024-06-27 20:01:32,149 INFO L83 FinitePrefix]: Finished finitePrefix Result has 126190 conditions, 19576 events. 13895/19576 cut-off events. For 646067/646067 co-relation queries the response was YES. Maximal size of possible extension queue 662. Compared 112368 event pairs, 5305 based on Foata normal form. 6/19575 useless extension candidates. Maximal degree in co-relation 126143. Up to 18553 conditions per place. [2024-06-27 20:01:32,238 INFO L140 encePairwiseOnDemand]: 40/53 looper letters, 182 selfloop transitions, 38 changer transitions 0/228 dead transitions. [2024-06-27 20:01:32,239 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 127 places, 228 transitions, 2130 flow [2024-06-27 20:01:32,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 20:01:32,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 20:01:32,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 262 transitions. [2024-06-27 20:01:32,240 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49433962264150944 [2024-06-27 20:01:32,240 INFO L175 Difference]: Start difference. First operand has 118 places, 156 transitions, 1196 flow. Second operand 10 states and 262 transitions. [2024-06-27 20:01:32,240 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 127 places, 228 transitions, 2130 flow [2024-06-27 20:01:32,595 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 122 places, 228 transitions, 2018 flow, removed 35 selfloop flow, removed 5 redundant places. [2024-06-27 20:01:32,597 INFO L231 Difference]: Finished difference. Result has 123 places, 162 transitions, 1348 flow [2024-06-27 20:01:32,597 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=1084, PETRI_DIFFERENCE_MINUEND_PLACES=113, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=156, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=121, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1348, PETRI_PLACES=123, PETRI_TRANSITIONS=162} [2024-06-27 20:01:32,597 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 67 predicate places. [2024-06-27 20:01:32,598 INFO L495 AbstractCegarLoop]: Abstraction has has 123 places, 162 transitions, 1348 flow [2024-06-27 20:01:32,598 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 14.3) internal successors, (143), 10 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:01:32,598 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:01:32,598 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:01:32,598 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2024-06-27 20:01:32,598 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)] === [2024-06-27 20:01:32,599 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:01:32,599 INFO L85 PathProgramCache]: Analyzing trace with hash 375702207, now seen corresponding path program 2 times [2024-06-27 20:01:32,599 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:01:32,599 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [166655685] [2024-06-27 20:01:32,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:01:32,599 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:01:32,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:01:34,032 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:01:34,032 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:01:34,032 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [166655685] [2024-06-27 20:01:34,032 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [166655685] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:01:34,033 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:01:34,033 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:01:34,033 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [39799027] [2024-06-27 20:01:34,033 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:01:34,034 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:01:34,034 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:01:34,035 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:01:34,035 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:01:34,195 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 53 [2024-06-27 20:01:34,195 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 123 places, 162 transitions, 1348 flow. Second operand has 10 states, 10 states have (on average 14.3) internal successors, (143), 10 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:01:34,195 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:01:34,195 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 53 [2024-06-27 20:01:34,196 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:01:37,184 INFO L124 PetriNetUnfolderBase]: 13931/19628 cut-off events. [2024-06-27 20:01:37,185 INFO L125 PetriNetUnfolderBase]: For 707144/707144 co-relation queries the response was YES. [2024-06-27 20:01:37,258 INFO L83 FinitePrefix]: Finished finitePrefix Result has 129984 conditions, 19628 events. 13931/19628 cut-off events. For 707144/707144 co-relation queries the response was YES. Maximal size of possible extension queue 662. Compared 112739 event pairs, 5975 based on Foata normal form. 6/19627 useless extension candidates. Maximal degree in co-relation 129936. Up to 18702 conditions per place. [2024-06-27 20:01:37,349 INFO L140 encePairwiseOnDemand]: 40/53 looper letters, 186 selfloop transitions, 33 changer transitions 0/227 dead transitions. [2024-06-27 20:01:37,349 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 132 places, 227 transitions, 2038 flow [2024-06-27 20:01:37,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 20:01:37,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 20:01:37,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 258 transitions. [2024-06-27 20:01:37,350 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4867924528301887 [2024-06-27 20:01:37,350 INFO L175 Difference]: Start difference. First operand has 123 places, 162 transitions, 1348 flow. Second operand 10 states and 258 transitions. [2024-06-27 20:01:37,350 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 132 places, 227 transitions, 2038 flow [2024-06-27 20:01:37,589 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 126 places, 227 transitions, 1871 flow, removed 66 selfloop flow, removed 6 redundant places. [2024-06-27 20:01:37,591 INFO L231 Difference]: Finished difference. Result has 127 places, 165 transitions, 1355 flow [2024-06-27 20:01:37,591 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=1207, PETRI_DIFFERENCE_MINUEND_PLACES=117, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=162, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=129, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1355, PETRI_PLACES=127, PETRI_TRANSITIONS=165} [2024-06-27 20:01:37,592 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 71 predicate places. [2024-06-27 20:01:37,592 INFO L495 AbstractCegarLoop]: Abstraction has has 127 places, 165 transitions, 1355 flow [2024-06-27 20:01:37,593 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 14.3) internal successors, (143), 10 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:01:37,593 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:01:37,593 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:01:37,593 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2024-06-27 20:01:37,593 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)] === [2024-06-27 20:01:37,593 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:01:37,593 INFO L85 PathProgramCache]: Analyzing trace with hash 375702331, now seen corresponding path program 1 times [2024-06-27 20:01:37,594 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:01:37,594 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [761215066] [2024-06-27 20:01:37,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:01:37,594 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:01:37,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:01:39,094 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:01:39,094 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:01:39,094 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [761215066] [2024-06-27 20:01:39,094 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [761215066] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:01:39,094 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:01:39,095 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:01:39,095 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [680075314] [2024-06-27 20:01:39,095 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:01:39,095 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:01:39,095 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:01:39,096 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:01:39,096 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:01:39,281 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 53 [2024-06-27 20:01:39,281 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 127 places, 165 transitions, 1355 flow. Second operand has 10 states, 10 states have (on average 14.3) internal successors, (143), 10 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:01:39,281 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:01:39,281 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 53 [2024-06-27 20:01:39,281 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:01:42,260 INFO L124 PetriNetUnfolderBase]: 14037/19720 cut-off events. [2024-06-27 20:01:42,261 INFO L125 PetriNetUnfolderBase]: For 758490/758490 co-relation queries the response was YES. [2024-06-27 20:01:42,340 INFO L83 FinitePrefix]: Finished finitePrefix Result has 132305 conditions, 19720 events. 14037/19720 cut-off events. For 758490/758490 co-relation queries the response was YES. Maximal size of possible extension queue 662. Compared 112905 event pairs, 5887 based on Foata normal form. 6/19721 useless extension candidates. Maximal degree in co-relation 132255. Up to 18761 conditions per place. [2024-06-27 20:01:42,553 INFO L140 encePairwiseOnDemand]: 39/53 looper letters, 192 selfloop transitions, 40 changer transitions 0/240 dead transitions. [2024-06-27 20:01:42,553 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 136 places, 240 transitions, 2349 flow [2024-06-27 20:01:42,554 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 20:01:42,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 20:01:42,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 266 transitions. [2024-06-27 20:01:42,555 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5018867924528302 [2024-06-27 20:01:42,555 INFO L175 Difference]: Start difference. First operand has 127 places, 165 transitions, 1355 flow. Second operand 10 states and 266 transitions. [2024-06-27 20:01:42,555 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 136 places, 240 transitions, 2349 flow [2024-06-27 20:01:42,866 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 128 places, 240 transitions, 2233 flow, removed 27 selfloop flow, removed 8 redundant places. [2024-06-27 20:01:42,868 INFO L231 Difference]: Finished difference. Result has 129 places, 173 transitions, 1526 flow [2024-06-27 20:01:42,868 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=1239, PETRI_DIFFERENCE_MINUEND_PLACES=119, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=165, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=129, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1526, PETRI_PLACES=129, PETRI_TRANSITIONS=173} [2024-06-27 20:01:42,869 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 73 predicate places. [2024-06-27 20:01:42,869 INFO L495 AbstractCegarLoop]: Abstraction has has 129 places, 173 transitions, 1526 flow [2024-06-27 20:01:42,869 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 14.3) internal successors, (143), 10 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:01:42,869 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:01:42,870 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:01:42,870 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2024-06-27 20:01:42,870 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-27 20:01:42,870 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:01:42,870 INFO L85 PathProgramCache]: Analyzing trace with hash 378498841, now seen corresponding path program 2 times [2024-06-27 20:01:42,870 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:01:42,871 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [588349958] [2024-06-27 20:01:42,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:01:42,871 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:01:42,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:01:44,239 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:01:44,239 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:01:44,239 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [588349958] [2024-06-27 20:01:44,239 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [588349958] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:01:44,239 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:01:44,239 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:01:44,239 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1936346069] [2024-06-27 20:01:44,239 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:01:44,240 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:01:44,240 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:01:44,240 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:01:44,240 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:01:44,460 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 53 [2024-06-27 20:01:44,460 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 129 places, 173 transitions, 1526 flow. Second operand has 10 states, 10 states have (on average 14.3) internal successors, (143), 10 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:01:44,460 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:01:44,460 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 53 [2024-06-27 20:01:44,461 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand