./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-wmm/mix053_power.oepc_pso.oepc_rmo.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/mutex-meet-nonrel/mix053_power.oepc_pso.oepc_rmo.oepc.yml/witness.yml --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version eb4cb34f Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReachWitnessValidation.xml -i ../../../trunk/examples/svcomp/pthread-wmm/mix053_power.oepc_pso.oepc_rmo.oepc.i ./goblint.2024-06-19_11-23-25.files/mutex-meet-nonrel/mix053_power.oepc_pso.oepc_rmo.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-eb4cb34-m [2024-06-21 21:15:33,353 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-21 21:15:33,431 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-21 21:15:33,436 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-21 21:15:33,437 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-21 21:15:33,479 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-21 21:15:33,480 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-21 21:15:33,480 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-21 21:15:33,481 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-21 21:15:33,485 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-21 21:15:33,485 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-21 21:15:33,485 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-21 21:15:33,486 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-21 21:15:33,487 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-21 21:15:33,488 INFO L153 SettingsManager]: * Use SBE=true [2024-06-21 21:15:33,488 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-21 21:15:33,488 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-21 21:15:33,489 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-21 21:15:33,495 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-21 21:15:33,495 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-21 21:15:33,495 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-21 21:15:33,496 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-21 21:15:33,496 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-21 21:15:33,496 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-21 21:15:33,497 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-21 21:15:33,497 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-21 21:15:33,497 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-21 21:15:33,497 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-21 21:15:33,498 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-21 21:15:33,499 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-21 21:15:33,500 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-21 21:15:33,500 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-21 21:15:33,500 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-21 21:15:33,500 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-21 21:15:33,500 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-21 21:15:33,501 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-21 21:15:33,501 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-21 21:15:33,501 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-21 21:15:33,501 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-21 21:15:33,502 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-21 21:15:33,502 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-21 21:15:33,502 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-21 21:15:33,503 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-21 21:15:33,503 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false [2024-06-21 21:15:33,754 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-21 21:15:33,781 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-21 21:15:33,783 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-21 21:15:33,784 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-21 21:15:33,784 INFO L274 PluginConnector]: CDTParser initialized [2024-06-21 21:15:33,785 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/mix053_power.oepc_pso.oepc_rmo.oepc.i [2024-06-21 21:15:34,953 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-21 21:15:35,205 INFO L384 CDTParser]: Found 1 translation units. [2024-06-21 21:15:35,206 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/mix053_power.oepc_pso.oepc_rmo.oepc.i [2024-06-21 21:15:35,229 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8996318c7/7d7d817a1e2342f7807e9cf9f48025cb/FLAG359cb761f [2024-06-21 21:15:35,241 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8996318c7/7d7d817a1e2342f7807e9cf9f48025cb [2024-06-21 21:15:35,243 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-06-21 21:15:35,243 INFO L274 PluginConnector]: Witness Parser initialized [2024-06-21 21:15:35,244 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-06-19_11-23-25.files/mutex-meet-nonrel/mix053_power.oepc_pso.oepc_rmo.oepc.yml/witness.yml [2024-06-21 21:15:35,474 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-21 21:15:35,475 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-06-21 21:15:35,478 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-21 21:15:35,478 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-21 21:15:35,483 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-21 21:15:35,483 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.06 09:15:35" (1/2) ... [2024-06-21 21:15:35,484 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5fe3075f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 09:15:35, skipping insertion in model container [2024-06-21 21:15:35,485 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.06 09:15:35" (1/2) ... [2024-06-21 21:15:35,486 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@4bdacd53 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 09:15:35, skipping insertion in model container [2024-06-21 21:15:35,487 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 21.06 09:15:35" (2/2) ... [2024-06-21 21:15:35,487 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5fe3075f and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 09:15:35, skipping insertion in model container [2024-06-21 21:15:35,487 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 21.06 09:15:35" (2/2) ... [2024-06-21 21:15:35,488 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-06-21 21:15:35,609 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-06-21 21:15:35,610 INFO L97 edCorrectnessWitness]: Location invariant before [L867-L867] ((((((((((((((((((((! multithreaded || a$read_delayed == (_Bool)0) && (! multithreaded || (a$mem_tmp == 0 || a$mem_tmp == 1))) && (! multithreaded || a$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || ((((((((((((((((((((0 <= __unbuffered_cnt && a$flush_delayed == (_Bool)0) && a$r_buff0_thd0 == (_Bool)0) && a$r_buff0_thd2 == (_Bool)0) && a$r_buff0_thd3 == (_Bool)0) && a$r_buff0_thd4 == (_Bool)0) && a$r_buff1_thd0 == (_Bool)0) && a$r_buff1_thd2 == (_Bool)0) && a$r_buff1_thd3 == (_Bool)0) && a$r_buff1_thd4 == (_Bool)0) && a$read_delayed == (_Bool)0) && a$read_delayed_var == 0) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)) && (__unbuffered_p3_EAX == 0 || __unbuffered_p3_EAX == 1)) && (a == 0 || a == 1)) && (a$mem_tmp == 0 || a$mem_tmp == 1)) && (a$w_buff0 == 0 || a$w_buff0 == 1)) && (a$w_buff1 == 0 || a$w_buff1 == 1)) && (z == 0 || z == 1)) && ((x == 0 || x == 1) || x == 2)) && ((y == 0 || y == 1) || y == 2)))) && (! multithreaded || a$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || ((x == 0 || x == 1) || x == 2))) && (! multithreaded || (__unbuffered_p3_EAX == 0 || __unbuffered_p3_EAX == 1))) && (! multithreaded || (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1))) && (! multithreaded || (a == 0 || a == 1))) && (! multithreaded || a$r_buff0_thd4 == (_Bool)0)) && (! multithreaded || ((y == 0 || y == 1) || y == 2))) && (! multithreaded || a$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || (z == 0 || z == 1))) && (! multithreaded || a$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || a$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || (a$w_buff0 == 0 || a$w_buff0 == 1))) && (! multithreaded || a$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || (a$w_buff1 == 0 || a$w_buff1 == 1))) && (! multithreaded || a$r_buff1_thd4 == (_Bool)0)) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || a$read_delayed_var == 0) [2024-06-21 21:15:35,610 INFO L97 edCorrectnessWitness]: Location invariant before [L864-L864] ((((((((((((((((((((! multithreaded || a$read_delayed == (_Bool)0) && (! multithreaded || (a$mem_tmp == 0 || a$mem_tmp == 1))) && (! multithreaded || a$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || ((((((((((((((((((((0 <= __unbuffered_cnt && a$flush_delayed == (_Bool)0) && a$r_buff0_thd0 == (_Bool)0) && a$r_buff0_thd2 == (_Bool)0) && a$r_buff0_thd3 == (_Bool)0) && a$r_buff0_thd4 == (_Bool)0) && a$r_buff1_thd0 == (_Bool)0) && a$r_buff1_thd2 == (_Bool)0) && a$r_buff1_thd3 == (_Bool)0) && a$r_buff1_thd4 == (_Bool)0) && a$read_delayed == (_Bool)0) && a$read_delayed_var == 0) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)) && (__unbuffered_p3_EAX == 0 || __unbuffered_p3_EAX == 1)) && (a == 0 || a == 1)) && (a$mem_tmp == 0 || a$mem_tmp == 1)) && (a$w_buff0 == 0 || a$w_buff0 == 1)) && (a$w_buff1 == 0 || a$w_buff1 == 1)) && (z == 0 || z == 1)) && ((x == 0 || x == 1) || x == 2)) && ((y == 0 || y == 1) || y == 2)))) && (! multithreaded || a$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || ((x == 0 || x == 1) || x == 2))) && (! multithreaded || (__unbuffered_p3_EAX == 0 || __unbuffered_p3_EAX == 1))) && (! multithreaded || (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1))) && (! multithreaded || (a == 0 || a == 1))) && (! multithreaded || a$r_buff0_thd4 == (_Bool)0)) && (! multithreaded || ((y == 0 || y == 1) || y == 2))) && (! multithreaded || a$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || (z == 0 || z == 1))) && (! multithreaded || a$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || a$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || (a$w_buff0 == 0 || a$w_buff0 == 1))) && (! multithreaded || a$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || (a$w_buff1 == 0 || a$w_buff1 == 1))) && (! multithreaded || a$r_buff1_thd4 == (_Bool)0)) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || a$read_delayed_var == 0) [2024-06-21 21:15:35,611 INFO L97 edCorrectnessWitness]: Location invariant before [L862-L862] ((((((((((((((((((((! multithreaded || a$read_delayed == (_Bool)0) && (! multithreaded || (a$mem_tmp == 0 || a$mem_tmp == 1))) && (! multithreaded || a$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || ((((((((((((((((((((0 <= __unbuffered_cnt && a$flush_delayed == (_Bool)0) && a$r_buff0_thd0 == (_Bool)0) && a$r_buff0_thd2 == (_Bool)0) && a$r_buff0_thd3 == (_Bool)0) && a$r_buff0_thd4 == (_Bool)0) && a$r_buff1_thd0 == (_Bool)0) && a$r_buff1_thd2 == (_Bool)0) && a$r_buff1_thd3 == (_Bool)0) && a$r_buff1_thd4 == (_Bool)0) && a$read_delayed == (_Bool)0) && a$read_delayed_var == 0) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)) && (__unbuffered_p3_EAX == 0 || __unbuffered_p3_EAX == 1)) && (a == 0 || a == 1)) && (a$mem_tmp == 0 || a$mem_tmp == 1)) && (a$w_buff0 == 0 || a$w_buff0 == 1)) && (a$w_buff1 == 0 || a$w_buff1 == 1)) && (z == 0 || z == 1)) && ((x == 0 || x == 1) || x == 2)) && ((y == 0 || y == 1) || y == 2)))) && (! multithreaded || a$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || ((x == 0 || x == 1) || x == 2))) && (! multithreaded || (__unbuffered_p3_EAX == 0 || __unbuffered_p3_EAX == 1))) && (! multithreaded || (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1))) && (! multithreaded || (a == 0 || a == 1))) && (! multithreaded || a$r_buff0_thd4 == (_Bool)0)) && (! multithreaded || ((y == 0 || y == 1) || y == 2))) && (! multithreaded || a$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || (z == 0 || z == 1))) && (! multithreaded || a$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || a$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || (a$w_buff0 == 0 || a$w_buff0 == 1))) && (! multithreaded || a$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || (a$w_buff1 == 0 || a$w_buff1 == 1))) && (! multithreaded || a$r_buff1_thd4 == (_Bool)0)) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || a$read_delayed_var == 0) [2024-06-21 21:15:35,611 INFO L97 edCorrectnessWitness]: Location invariant before [L866-L866] ((((((((((((((((((((! multithreaded || a$read_delayed == (_Bool)0) && (! multithreaded || (a$mem_tmp == 0 || a$mem_tmp == 1))) && (! multithreaded || a$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || ((((((((((((((((((((0 <= __unbuffered_cnt && a$flush_delayed == (_Bool)0) && a$r_buff0_thd0 == (_Bool)0) && a$r_buff0_thd2 == (_Bool)0) && a$r_buff0_thd3 == (_Bool)0) && a$r_buff0_thd4 == (_Bool)0) && a$r_buff1_thd0 == (_Bool)0) && a$r_buff1_thd2 == (_Bool)0) && a$r_buff1_thd3 == (_Bool)0) && a$r_buff1_thd4 == (_Bool)0) && a$read_delayed == (_Bool)0) && a$read_delayed_var == 0) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)) && (__unbuffered_p3_EAX == 0 || __unbuffered_p3_EAX == 1)) && (a == 0 || a == 1)) && (a$mem_tmp == 0 || a$mem_tmp == 1)) && (a$w_buff0 == 0 || a$w_buff0 == 1)) && (a$w_buff1 == 0 || a$w_buff1 == 1)) && (z == 0 || z == 1)) && ((x == 0 || x == 1) || x == 2)) && ((y == 0 || y == 1) || y == 2)))) && (! multithreaded || a$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || ((x == 0 || x == 1) || x == 2))) && (! multithreaded || (__unbuffered_p3_EAX == 0 || __unbuffered_p3_EAX == 1))) && (! multithreaded || (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1))) && (! multithreaded || (a == 0 || a == 1))) && (! multithreaded || a$r_buff0_thd4 == (_Bool)0)) && (! multithreaded || ((y == 0 || y == 1) || y == 2))) && (! multithreaded || a$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || (z == 0 || z == 1))) && (! multithreaded || a$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || a$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || (a$w_buff0 == 0 || a$w_buff0 == 1))) && (! multithreaded || a$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || (a$w_buff1 == 0 || a$w_buff1 == 1))) && (! multithreaded || a$r_buff1_thd4 == (_Bool)0)) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || a$read_delayed_var == 0) [2024-06-21 21:15:35,611 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-06-21 21:15:35,612 INFO L106 edCorrectnessWitness]: ghost_update [L860-L860] multithreaded = 1; [2024-06-21 21:15:35,657 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-21 21:15:36,040 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-21 21:15:36,052 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-06-21 21:15:36,195 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-21 21:15:36,251 INFO L206 MainTranslator]: Completed translation [2024-06-21 21:15:36,252 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 09:15:36 WrapperNode [2024-06-21 21:15:36,252 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-21 21:15:36,253 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-21 21:15:36,253 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-21 21:15:36,253 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-21 21:15:36,260 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 09:15:36" (1/1) ... [2024-06-21 21:15:36,290 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 09:15:36" (1/1) ... [2024-06-21 21:15:36,330 INFO L138 Inliner]: procedures = 176, calls = 52, calls flagged for inlining = 6, calls inlined = 7, statements flattened = 137 [2024-06-21 21:15:36,330 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-21 21:15:36,331 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-21 21:15:36,331 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-21 21:15:36,332 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-21 21:15:36,342 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 09:15:36" (1/1) ... [2024-06-21 21:15:36,342 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 09:15:36" (1/1) ... [2024-06-21 21:15:36,360 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 09:15:36" (1/1) ... [2024-06-21 21:15:36,392 INFO L175 MemorySlicer]: Split 2 memory accesses to 1 slices as follows [2]. 100 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2]. The 0 writes are split as follows [0]. [2024-06-21 21:15:36,393 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 09:15:36" (1/1) ... [2024-06-21 21:15:36,393 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 09:15:36" (1/1) ... [2024-06-21 21:15:36,403 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 09:15:36" (1/1) ... [2024-06-21 21:15:36,418 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 09:15:36" (1/1) ... [2024-06-21 21:15:36,420 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 09:15:36" (1/1) ... [2024-06-21 21:15:36,428 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 09:15:36" (1/1) ... [2024-06-21 21:15:36,433 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-21 21:15:36,434 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-21 21:15:36,434 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-21 21:15:36,434 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-21 21:15:36,435 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 09:15:36" (1/1) ... [2024-06-21 21:15:36,442 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-21 21:15:36,449 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-21 21:15:36,481 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-06-21 21:15:36,497 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-06-21 21:15:36,522 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-06-21 21:15:36,522 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-21 21:15:36,523 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2024-06-21 21:15:36,523 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2024-06-21 21:15:36,523 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2024-06-21 21:15:36,524 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2024-06-21 21:15:36,524 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2024-06-21 21:15:36,524 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2024-06-21 21:15:36,524 INFO L130 BoogieDeclarations]: Found specification of procedure P3 [2024-06-21 21:15:36,524 INFO L138 BoogieDeclarations]: Found implementation of procedure P3 [2024-06-21 21:15:36,525 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-21 21:15:36,525 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-06-21 21:15:36,525 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-21 21:15:36,526 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-21 21:15:36,527 WARN L214 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2024-06-21 21:15:36,662 INFO L244 CfgBuilder]: Building ICFG [2024-06-21 21:15:36,664 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-21 21:15:37,043 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-21 21:15:37,043 INFO L293 CfgBuilder]: Performing block encoding [2024-06-21 21:15:37,231 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-21 21:15:37,232 INFO L320 CfgBuilder]: Removed 0 assume(true) statements. [2024-06-21 21:15:37,232 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.06 09:15:37 BoogieIcfgContainer [2024-06-21 21:15:37,232 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-21 21:15:37,236 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-21 21:15:37,236 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-21 21:15:37,239 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-21 21:15:37,239 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.06 09:15:35" (1/4) ... [2024-06-21 21:15:37,239 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@91e7442 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.06 09:15:37, skipping insertion in model container [2024-06-21 21:15:37,240 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 21.06 09:15:35" (2/4) ... [2024-06-21 21:15:37,240 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@91e7442 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 21.06 09:15:37, skipping insertion in model container [2024-06-21 21:15:37,240 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 09:15:36" (3/4) ... [2024-06-21 21:15:37,241 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@91e7442 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 21.06 09:15:37, skipping insertion in model container [2024-06-21 21:15:37,241 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.06 09:15:37" (4/4) ... [2024-06-21 21:15:37,242 INFO L112 eAbstractionObserver]: Analyzing ICFG mix053_power.oepc_pso.oepc_rmo.oepc.i [2024-06-21 21:15:37,258 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-21 21:15:37,258 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 4 error locations. [2024-06-21 21:15:37,258 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-21 21:15:37,314 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-06-21 21:15:37,370 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 64 places, 51 transitions, 118 flow [2024-06-21 21:15:37,409 INFO L124 PetriNetUnfolderBase]: 0/47 cut-off events. [2024-06-21 21:15:37,410 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-21 21:15:37,412 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60 conditions, 47 events. 0/47 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 89 event pairs, 0 based on Foata normal form. 0/43 useless extension candidates. Maximal degree in co-relation 0. Up to 1 conditions per place. [2024-06-21 21:15:37,412 INFO L82 GeneralOperation]: Start removeDead. Operand has 64 places, 51 transitions, 118 flow [2024-06-21 21:15:37,417 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 54 places, 41 transitions, 94 flow [2024-06-21 21:15:37,431 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-21 21:15:37,435 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;@7843282b, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-21 21:15:37,436 INFO L358 AbstractCegarLoop]: Starting to check reachability of 8 error locations. [2024-06-21 21:15:37,440 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-21 21:15:37,441 INFO L124 PetriNetUnfolderBase]: 0/5 cut-off events. [2024-06-21 21:15:37,441 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-21 21:15:37,441 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:15:37,441 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2024-06-21 21:15:37,442 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 21:15:37,446 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:15:37,447 INFO L85 PathProgramCache]: Analyzing trace with hash 394003208, now seen corresponding path program 1 times [2024-06-21 21:15:37,455 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:15:37,456 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1345143310] [2024-06-21 21:15:37,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:15:37,457 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:15:37,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:15:38,531 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:15:38,532 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:15:38,532 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1345143310] [2024-06-21 21:15:38,533 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1345143310] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:15:38,533 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:15:38,533 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-06-21 21:15:38,535 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [892918709] [2024-06-21 21:15:38,535 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:15:38,543 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-21 21:15:38,548 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:15:38,573 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-21 21:15:38,574 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-21 21:15:38,616 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 51 [2024-06-21 21:15:38,619 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 41 transitions, 94 flow. Second operand has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:15:38,620 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:15:38,620 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 51 [2024-06-21 21:15:38,621 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:15:40,690 INFO L124 PetriNetUnfolderBase]: 11639/15919 cut-off events. [2024-06-21 21:15:40,691 INFO L125 PetriNetUnfolderBase]: For 220/220 co-relation queries the response was YES. [2024-06-21 21:15:40,719 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32135 conditions, 15919 events. 11639/15919 cut-off events. For 220/220 co-relation queries the response was YES. Maximal size of possible extension queue 560. Compared 83871 event pairs, 9112 based on Foata normal form. 1/15700 useless extension candidates. Maximal degree in co-relation 32122. Up to 15753 conditions per place. [2024-06-21 21:15:40,808 INFO L140 encePairwiseOnDemand]: 42/51 looper letters, 44 selfloop transitions, 5 changer transitions 0/55 dead transitions. [2024-06-21 21:15:40,809 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 55 transitions, 229 flow [2024-06-21 21:15:40,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-21 21:15:40,812 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-21 21:15:40,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 92 transitions. [2024-06-21 21:15:40,820 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6013071895424836 [2024-06-21 21:15:40,822 INFO L175 Difference]: Start difference. First operand has 54 places, 41 transitions, 94 flow. Second operand 3 states and 92 transitions. [2024-06-21 21:15:40,823 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 55 transitions, 229 flow [2024-06-21 21:15:40,825 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 55 transitions, 222 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-06-21 21:15:40,828 INFO L231 Difference]: Finished difference. Result has 53 places, 45 transitions, 129 flow [2024-06-21 21:15:40,830 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=90, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=129, PETRI_PLACES=53, PETRI_TRANSITIONS=45} [2024-06-21 21:15:40,832 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, -1 predicate places. [2024-06-21 21:15:40,833 INFO L495 AbstractCegarLoop]: Abstraction has has 53 places, 45 transitions, 129 flow [2024-06-21 21:15:40,833 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:15:40,833 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:15:40,833 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:15:40,834 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-21 21:15:40,834 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 21:15:40,834 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:15:40,835 INFO L85 PathProgramCache]: Analyzing trace with hash 680618781, now seen corresponding path program 1 times [2024-06-21 21:15:40,835 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:15:40,835 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2120694769] [2024-06-21 21:15:40,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:15:40,836 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:15:40,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:15:41,662 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:15:41,663 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:15:41,663 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2120694769] [2024-06-21 21:15:41,663 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2120694769] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:15:41,664 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:15:41,664 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-21 21:15:41,664 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1249361465] [2024-06-21 21:15:41,664 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:15:41,666 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-21 21:15:41,666 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:15:41,667 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-21 21:15:41,667 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-06-21 21:15:41,711 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 51 [2024-06-21 21:15:41,711 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 45 transitions, 129 flow. Second operand has 4 states, 4 states have (on average 14.25) internal successors, (57), 4 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:15:41,712 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:15:41,712 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 51 [2024-06-21 21:15:41,712 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:15:43,652 INFO L124 PetriNetUnfolderBase]: 11629/15905 cut-off events. [2024-06-21 21:15:43,652 INFO L125 PetriNetUnfolderBase]: For 2878/2878 co-relation queries the response was YES. [2024-06-21 21:15:43,680 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36114 conditions, 15905 events. 11629/15905 cut-off events. For 2878/2878 co-relation queries the response was YES. Maximal size of possible extension queue 560. Compared 83851 event pairs, 8311 based on Foata normal form. 4/15908 useless extension candidates. Maximal degree in co-relation 36102. Up to 15718 conditions per place. [2024-06-21 21:15:43,750 INFO L140 encePairwiseOnDemand]: 41/51 looper letters, 54 selfloop transitions, 9 changer transitions 0/69 dead transitions. [2024-06-21 21:15:43,750 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 69 transitions, 321 flow [2024-06-21 21:15:43,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-21 21:15:43,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-21 21:15:43,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 119 transitions. [2024-06-21 21:15:43,755 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5833333333333334 [2024-06-21 21:15:43,755 INFO L175 Difference]: Start difference. First operand has 53 places, 45 transitions, 129 flow. Second operand 4 states and 119 transitions. [2024-06-21 21:15:43,756 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 69 transitions, 321 flow [2024-06-21 21:15:43,758 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 69 transitions, 316 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-21 21:15:43,759 INFO L231 Difference]: Finished difference. Result has 56 places, 49 transitions, 177 flow [2024-06-21 21:15:43,760 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=124, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=177, PETRI_PLACES=56, PETRI_TRANSITIONS=49} [2024-06-21 21:15:43,760 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 2 predicate places. [2024-06-21 21:15:43,761 INFO L495 AbstractCegarLoop]: Abstraction has has 56 places, 49 transitions, 177 flow [2024-06-21 21:15:43,763 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 14.25) internal successors, (57), 4 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:15:43,763 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:15:43,764 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:15:43,764 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-06-21 21:15:43,765 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 21:15:43,770 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:15:43,770 INFO L85 PathProgramCache]: Analyzing trace with hash -375652567, now seen corresponding path program 1 times [2024-06-21 21:15:43,771 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:15:43,771 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [7732367] [2024-06-21 21:15:43,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:15:43,772 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:15:43,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:15:44,550 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:15:44,551 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:15:44,551 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [7732367] [2024-06-21 21:15:44,551 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [7732367] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:15:44,551 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:15:44,552 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-21 21:15:44,552 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1076203573] [2024-06-21 21:15:44,552 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:15:44,552 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-21 21:15:44,553 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:15:44,554 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-21 21:15:44,555 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-06-21 21:15:44,629 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 51 [2024-06-21 21:15:44,630 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 49 transitions, 177 flow. Second operand has 5 states, 5 states have (on average 14.2) internal successors, (71), 5 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:15:44,631 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:15:44,631 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 51 [2024-06-21 21:15:44,631 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:15:46,428 INFO L124 PetriNetUnfolderBase]: 11647/15976 cut-off events. [2024-06-21 21:15:46,428 INFO L125 PetriNetUnfolderBase]: For 8291/8291 co-relation queries the response was YES. [2024-06-21 21:15:46,452 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40209 conditions, 15976 events. 11647/15976 cut-off events. For 8291/8291 co-relation queries the response was YES. Maximal size of possible extension queue 557. Compared 84601 event pairs, 6980 based on Foata normal form. 7/15982 useless extension candidates. Maximal degree in co-relation 40195. Up to 15639 conditions per place. [2024-06-21 21:15:46,519 INFO L140 encePairwiseOnDemand]: 39/51 looper letters, 72 selfloop transitions, 21 changer transitions 0/99 dead transitions. [2024-06-21 21:15:46,519 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 99 transitions, 537 flow [2024-06-21 21:15:46,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-21 21:15:46,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-21 21:15:46,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 156 transitions. [2024-06-21 21:15:46,521 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.611764705882353 [2024-06-21 21:15:46,521 INFO L175 Difference]: Start difference. First operand has 56 places, 49 transitions, 177 flow. Second operand 5 states and 156 transitions. [2024-06-21 21:15:46,521 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 99 transitions, 537 flow [2024-06-21 21:15:46,525 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 99 transitions, 518 flow, removed 3 selfloop flow, removed 2 redundant places. [2024-06-21 21:15:46,526 INFO L231 Difference]: Finished difference. Result has 61 places, 63 transitions, 308 flow [2024-06-21 21:15:46,527 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=158, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=308, PETRI_PLACES=61, PETRI_TRANSITIONS=63} [2024-06-21 21:15:46,528 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 7 predicate places. [2024-06-21 21:15:46,528 INFO L495 AbstractCegarLoop]: Abstraction has has 61 places, 63 transitions, 308 flow [2024-06-21 21:15:46,528 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 14.2) internal successors, (71), 5 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:15:46,528 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:15:46,529 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:15:46,529 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-06-21 21:15:46,529 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 21:15:46,530 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:15:46,530 INFO L85 PathProgramCache]: Analyzing trace with hash 657855814, now seen corresponding path program 1 times [2024-06-21 21:15:46,530 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:15:46,531 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2144733572] [2024-06-21 21:15:46,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:15:46,531 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:15:46,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:15:47,766 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:15:47,767 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:15:47,770 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2144733572] [2024-06-21 21:15:47,770 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2144733572] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:15:47,770 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:15:47,771 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 21:15:47,771 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1056167953] [2024-06-21 21:15:47,771 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:15:47,771 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 21:15:47,772 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:15:47,773 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 21:15:47,773 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-06-21 21:15:47,879 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 51 [2024-06-21 21:15:47,881 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 63 transitions, 308 flow. Second operand has 6 states, 6 states have (on average 14.166666666666666) internal successors, (85), 6 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:15:47,881 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:15:47,881 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 51 [2024-06-21 21:15:47,881 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:15:49,533 INFO L124 PetriNetUnfolderBase]: 11665/16006 cut-off events. [2024-06-21 21:15:49,533 INFO L125 PetriNetUnfolderBase]: For 19469/19473 co-relation queries the response was YES. [2024-06-21 21:15:49,570 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46456 conditions, 16006 events. 11665/16006 cut-off events. For 19469/19473 co-relation queries the response was YES. Maximal size of possible extension queue 557. Compared 84854 event pairs, 6185 based on Foata normal form. 11/16016 useless extension candidates. Maximal degree in co-relation 46439. Up to 15625 conditions per place. [2024-06-21 21:15:49,636 INFO L140 encePairwiseOnDemand]: 38/51 looper letters, 82 selfloop transitions, 26 changer transitions 0/114 dead transitions. [2024-06-21 21:15:49,637 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 114 transitions, 706 flow [2024-06-21 21:15:49,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 21:15:49,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 21:15:49,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 184 transitions. [2024-06-21 21:15:49,641 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6013071895424836 [2024-06-21 21:15:49,641 INFO L175 Difference]: Start difference. First operand has 61 places, 63 transitions, 308 flow. Second operand 6 states and 184 transitions. [2024-06-21 21:15:49,642 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 114 transitions, 706 flow [2024-06-21 21:15:49,651 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 114 transitions, 694 flow, removed 6 selfloop flow, removed 0 redundant places. [2024-06-21 21:15:49,654 INFO L231 Difference]: Finished difference. Result has 67 places, 68 transitions, 402 flow [2024-06-21 21:15:49,654 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=296, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=63, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=402, PETRI_PLACES=67, PETRI_TRANSITIONS=68} [2024-06-21 21:15:49,656 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 13 predicate places. [2024-06-21 21:15:49,656 INFO L495 AbstractCegarLoop]: Abstraction has has 67 places, 68 transitions, 402 flow [2024-06-21 21:15:49,656 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 14.166666666666666) internal successors, (85), 6 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:15:49,656 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:15:49,656 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:15:49,657 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-06-21 21:15:49,657 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 21:15:49,657 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:15:49,657 INFO L85 PathProgramCache]: Analyzing trace with hash -1081304482, now seen corresponding path program 1 times [2024-06-21 21:15:49,657 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:15:49,658 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1485979665] [2024-06-21 21:15:49,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:15:49,658 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:15:49,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:15:50,725 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:15:50,726 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:15:50,726 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1485979665] [2024-06-21 21:15:50,726 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1485979665] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:15:50,726 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:15:50,727 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 21:15:50,727 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1033399886] [2024-06-21 21:15:50,727 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:15:50,727 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 21:15:50,728 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:15:50,728 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 21:15:50,728 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2024-06-21 21:15:50,803 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 51 [2024-06-21 21:15:50,804 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 68 transitions, 402 flow. Second operand has 7 states, 7 states have (on average 14.142857142857142) internal successors, (99), 7 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:15:50,804 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:15:50,804 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 51 [2024-06-21 21:15:50,804 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:15:52,591 INFO L124 PetriNetUnfolderBase]: 11694/16050 cut-off events. [2024-06-21 21:15:52,592 INFO L125 PetriNetUnfolderBase]: For 30861/30865 co-relation queries the response was YES. [2024-06-21 21:15:52,630 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51366 conditions, 16050 events. 11694/16050 cut-off events. For 30861/30865 co-relation queries the response was YES. Maximal size of possible extension queue 557. Compared 85065 event pairs, 5263 based on Foata normal form. 18/16067 useless extension candidates. Maximal degree in co-relation 51346. Up to 15590 conditions per place. [2024-06-21 21:15:52,709 INFO L140 encePairwiseOnDemand]: 38/51 looper letters, 89 selfloop transitions, 30 changer transitions 0/125 dead transitions. [2024-06-21 21:15:52,709 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 125 transitions, 850 flow [2024-06-21 21:15:52,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 21:15:52,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 21:15:52,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 208 transitions. [2024-06-21 21:15:52,711 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5826330532212886 [2024-06-21 21:15:52,711 INFO L175 Difference]: Start difference. First operand has 67 places, 68 transitions, 402 flow. Second operand 7 states and 208 transitions. [2024-06-21 21:15:52,712 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 125 transitions, 850 flow [2024-06-21 21:15:52,726 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 125 transitions, 784 flow, removed 10 selfloop flow, removed 4 redundant places. [2024-06-21 21:15:52,728 INFO L231 Difference]: Finished difference. Result has 69 places, 71 transitions, 441 flow [2024-06-21 21:15:52,728 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=326, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=67, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=441, PETRI_PLACES=69, PETRI_TRANSITIONS=71} [2024-06-21 21:15:52,729 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 15 predicate places. [2024-06-21 21:15:52,729 INFO L495 AbstractCegarLoop]: Abstraction has has 69 places, 71 transitions, 441 flow [2024-06-21 21:15:52,729 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 14.142857142857142) internal successors, (99), 7 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:15:52,729 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:15:52,729 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:15:52,730 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-06-21 21:15:52,730 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 21:15:52,730 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:15:52,730 INFO L85 PathProgramCache]: Analyzing trace with hash 2090783415, now seen corresponding path program 1 times [2024-06-21 21:15:52,731 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:15:52,731 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [397254800] [2024-06-21 21:15:52,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:15:52,731 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:15:52,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:15:53,472 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:15:53,472 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:15:53,472 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [397254800] [2024-06-21 21:15:53,473 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [397254800] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:15:53,473 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:15:53,473 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 21:15:53,473 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [92602575] [2024-06-21 21:15:53,473 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:15:53,474 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 21:15:53,474 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:15:53,474 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 21:15:53,474 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-06-21 21:15:53,559 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 51 [2024-06-21 21:15:53,559 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 71 transitions, 441 flow. Second operand has 6 states, 6 states have (on average 12.5) internal successors, (75), 6 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:15:53,559 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:15:53,560 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 51 [2024-06-21 21:15:53,560 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:15:55,250 INFO L124 PetriNetUnfolderBase]: 11685/16030 cut-off events. [2024-06-21 21:15:55,250 INFO L125 PetriNetUnfolderBase]: For 43610/43610 co-relation queries the response was YES. [2024-06-21 21:15:55,290 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55154 conditions, 16030 events. 11685/16030 cut-off events. For 43610/43610 co-relation queries the response was YES. Maximal size of possible extension queue 557. Compared 84814 event pairs, 6112 based on Foata normal form. 3/16032 useless extension candidates. Maximal degree in co-relation 55132. Up to 15805 conditions per place. [2024-06-21 21:15:55,374 INFO L140 encePairwiseOnDemand]: 41/51 looper letters, 73 selfloop transitions, 10 changer transitions 0/88 dead transitions. [2024-06-21 21:15:55,374 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 88 transitions, 651 flow [2024-06-21 21:15:55,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-21 21:15:55,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-21 21:15:55,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 118 transitions. [2024-06-21 21:15:55,379 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4627450980392157 [2024-06-21 21:15:55,379 INFO L175 Difference]: Start difference. First operand has 69 places, 71 transitions, 441 flow. Second operand 5 states and 118 transitions. [2024-06-21 21:15:55,380 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 88 transitions, 651 flow [2024-06-21 21:15:55,396 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 88 transitions, 564 flow, removed 16 selfloop flow, removed 5 redundant places. [2024-06-21 21:15:55,398 INFO L231 Difference]: Finished difference. Result has 69 places, 71 transitions, 385 flow [2024-06-21 21:15:55,398 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=354, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=71, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=385, PETRI_PLACES=69, PETRI_TRANSITIONS=71} [2024-06-21 21:15:55,402 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 15 predicate places. [2024-06-21 21:15:55,402 INFO L495 AbstractCegarLoop]: Abstraction has has 69 places, 71 transitions, 385 flow [2024-06-21 21:15:55,402 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 12.5) internal successors, (75), 6 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:15:55,402 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:15:55,402 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:15:55,403 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-06-21 21:15:55,403 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 21:15:55,403 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:15:55,403 INFO L85 PathProgramCache]: Analyzing trace with hash 388854913, now seen corresponding path program 1 times [2024-06-21 21:15:55,404 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:15:55,405 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1158757166] [2024-06-21 21:15:55,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:15:55,406 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:15:55,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:15:56,281 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:15:56,281 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:15:56,282 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1158757166] [2024-06-21 21:15:56,282 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1158757166] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:15:56,282 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:15:56,282 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 21:15:56,282 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1989758078] [2024-06-21 21:15:56,283 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:15:56,283 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 21:15:56,283 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:15:56,284 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 21:15:56,284 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-21 21:15:56,358 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 51 [2024-06-21 21:15:56,359 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 71 transitions, 385 flow. Second operand has 7 states, 7 states have (on average 12.428571428571429) internal successors, (87), 7 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) [2024-06-21 21:15:56,359 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:15:56,359 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 51 [2024-06-21 21:15:56,359 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:15:58,245 INFO L124 PetriNetUnfolderBase]: 11751/16127 cut-off events. [2024-06-21 21:15:58,245 INFO L125 PetriNetUnfolderBase]: For 50290/50290 co-relation queries the response was YES. [2024-06-21 21:15:58,278 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56194 conditions, 16127 events. 11751/16127 cut-off events. For 50290/50290 co-relation queries the response was YES. Maximal size of possible extension queue 558. Compared 85018 event pairs, 5767 based on Foata normal form. 14/16139 useless extension candidates. Maximal degree in co-relation 56170. Up to 15681 conditions per place. [2024-06-21 21:15:58,346 INFO L140 encePairwiseOnDemand]: 39/51 looper letters, 91 selfloop transitions, 22 changer transitions 0/118 dead transitions. [2024-06-21 21:15:58,346 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 118 transitions, 835 flow [2024-06-21 21:15:58,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 21:15:58,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 21:15:58,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 153 transitions. [2024-06-21 21:15:58,348 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5 [2024-06-21 21:15:58,348 INFO L175 Difference]: Start difference. First operand has 69 places, 71 transitions, 385 flow. Second operand 6 states and 153 transitions. [2024-06-21 21:15:58,348 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 118 transitions, 835 flow [2024-06-21 21:15:58,367 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 118 transitions, 806 flow, removed 3 selfloop flow, removed 4 redundant places. [2024-06-21 21:15:58,369 INFO L231 Difference]: Finished difference. Result has 73 places, 85 transitions, 542 flow [2024-06-21 21:15:58,370 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=356, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=71, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=542, PETRI_PLACES=73, PETRI_TRANSITIONS=85} [2024-06-21 21:15:58,370 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 19 predicate places. [2024-06-21 21:15:58,370 INFO L495 AbstractCegarLoop]: Abstraction has has 73 places, 85 transitions, 542 flow [2024-06-21 21:15:58,371 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.428571428571429) internal successors, (87), 7 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) [2024-06-21 21:15:58,371 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:15:58,371 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:15:58,371 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-06-21 21:15:58,371 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 21:15:58,372 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:15:58,372 INFO L85 PathProgramCache]: Analyzing trace with hash -1694994892, now seen corresponding path program 1 times [2024-06-21 21:15:58,372 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:15:58,372 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1472882997] [2024-06-21 21:15:58,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:15:58,372 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:15:58,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:15:59,206 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:15:59,206 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:15:59,206 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1472882997] [2024-06-21 21:15:59,206 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1472882997] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:15:59,207 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:15:59,207 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 21:15:59,207 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1993485131] [2024-06-21 21:15:59,207 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:15:59,207 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 21:15:59,207 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:15:59,207 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 21:15:59,208 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-21 21:15:59,267 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 51 [2024-06-21 21:15:59,267 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 85 transitions, 542 flow. Second operand has 7 states, 7 states have (on average 12.428571428571429) internal successors, (87), 7 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) [2024-06-21 21:15:59,267 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:15:59,267 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 51 [2024-06-21 21:15:59,267 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:16:00,712 INFO L124 PetriNetUnfolderBase]: 11764/16149 cut-off events. [2024-06-21 21:16:00,712 INFO L125 PetriNetUnfolderBase]: For 70586/70594 co-relation queries the response was YES. [2024-06-21 21:16:00,762 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62512 conditions, 16149 events. 11764/16149 cut-off events. For 70586/70594 co-relation queries the response was YES. Maximal size of possible extension queue 558. Compared 85489 event pairs, 5928 based on Foata normal form. 14/16162 useless extension candidates. Maximal degree in co-relation 62486. Up to 15795 conditions per place. [2024-06-21 21:16:00,820 INFO L140 encePairwiseOnDemand]: 39/51 looper letters, 89 selfloop transitions, 25 changer transitions 0/119 dead transitions. [2024-06-21 21:16:00,820 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 119 transitions, 919 flow [2024-06-21 21:16:00,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 21:16:00,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 21:16:00,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 150 transitions. [2024-06-21 21:16:00,821 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49019607843137253 [2024-06-21 21:16:00,821 INFO L175 Difference]: Start difference. First operand has 73 places, 85 transitions, 542 flow. Second operand 6 states and 150 transitions. [2024-06-21 21:16:00,821 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 119 transitions, 919 flow [2024-06-21 21:16:00,868 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 119 transitions, 891 flow, removed 13 selfloop flow, removed 1 redundant places. [2024-06-21 21:16:00,870 INFO L231 Difference]: Finished difference. Result has 78 places, 89 transitions, 610 flow [2024-06-21 21:16:00,871 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=514, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=85, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=610, PETRI_PLACES=78, PETRI_TRANSITIONS=89} [2024-06-21 21:16:00,871 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 24 predicate places. [2024-06-21 21:16:00,871 INFO L495 AbstractCegarLoop]: Abstraction has has 78 places, 89 transitions, 610 flow [2024-06-21 21:16:00,872 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.428571428571429) internal successors, (87), 7 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) [2024-06-21 21:16:00,872 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:16:00,872 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:16:00,872 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-06-21 21:16:00,872 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 21:16:00,873 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:16:00,873 INFO L85 PathProgramCache]: Analyzing trace with hash -801086332, now seen corresponding path program 2 times [2024-06-21 21:16:00,873 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:16:00,873 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [187577387] [2024-06-21 21:16:00,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:16:00,874 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:16:00,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:16:01,659 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:16:01,660 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:16:01,660 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [187577387] [2024-06-21 21:16:01,660 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [187577387] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:16:01,660 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:16:01,661 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 21:16:01,661 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [156022661] [2024-06-21 21:16:01,661 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:16:01,661 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 21:16:01,662 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:16:01,662 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 21:16:01,662 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-21 21:16:01,796 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 51 [2024-06-21 21:16:01,797 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 89 transitions, 610 flow. Second operand has 7 states, 7 states have (on average 12.428571428571429) internal successors, (87), 7 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) [2024-06-21 21:16:01,797 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:16:01,797 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 51 [2024-06-21 21:16:01,797 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:16:03,296 INFO L124 PetriNetUnfolderBase]: 11734/16102 cut-off events. [2024-06-21 21:16:03,297 INFO L125 PetriNetUnfolderBase]: For 77749/77749 co-relation queries the response was YES. [2024-06-21 21:16:03,344 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63011 conditions, 16102 events. 11734/16102 cut-off events. For 77749/77749 co-relation queries the response was YES. Maximal size of possible extension queue 558. Compared 85054 event pairs, 5921 based on Foata normal form. 3/16104 useless extension candidates. Maximal degree in co-relation 62982. Up to 15851 conditions per place. [2024-06-21 21:16:03,402 INFO L140 encePairwiseOnDemand]: 40/51 looper letters, 94 selfloop transitions, 14 changer transitions 0/113 dead transitions. [2024-06-21 21:16:03,403 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 83 places, 113 transitions, 888 flow [2024-06-21 21:16:03,403 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 21:16:03,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 21:16:03,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 140 transitions. [2024-06-21 21:16:03,404 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45751633986928103 [2024-06-21 21:16:03,404 INFO L175 Difference]: Start difference. First operand has 78 places, 89 transitions, 610 flow. Second operand 6 states and 140 transitions. [2024-06-21 21:16:03,404 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 83 places, 113 transitions, 888 flow [2024-06-21 21:16:03,459 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 113 transitions, 845 flow, removed 7 selfloop flow, removed 3 redundant places. [2024-06-21 21:16:03,461 INFO L231 Difference]: Finished difference. Result has 81 places, 89 transitions, 606 flow [2024-06-21 21:16:03,461 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=567, PETRI_DIFFERENCE_MINUEND_PLACES=75, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=89, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=75, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=606, PETRI_PLACES=81, PETRI_TRANSITIONS=89} [2024-06-21 21:16:03,462 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 27 predicate places. [2024-06-21 21:16:03,462 INFO L495 AbstractCegarLoop]: Abstraction has has 81 places, 89 transitions, 606 flow [2024-06-21 21:16:03,462 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.428571428571429) internal successors, (87), 7 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) [2024-06-21 21:16:03,462 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:16:03,462 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:16:03,463 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-06-21 21:16:03,463 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 21:16:03,463 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:16:03,463 INFO L85 PathProgramCache]: Analyzing trace with hash -1005233052, now seen corresponding path program 1 times [2024-06-21 21:16:03,463 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:16:03,464 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [19400767] [2024-06-21 21:16:03,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:16:03,464 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:16:03,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:16:04,395 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:16:04,395 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:16:04,395 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [19400767] [2024-06-21 21:16:04,395 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [19400767] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:16:04,395 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:16:04,396 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 21:16:04,396 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [227909604] [2024-06-21 21:16:04,396 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:16:04,396 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 21:16:04,396 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:16:04,397 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 21:16:04,397 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-21 21:16:04,527 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 51 [2024-06-21 21:16:04,527 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 89 transitions, 606 flow. Second operand has 8 states, 8 states have (on average 12.375) internal successors, (99), 8 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:16:04,527 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:16:04,527 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 51 [2024-06-21 21:16:04,527 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:16:06,083 INFO L124 PetriNetUnfolderBase]: 12558/17200 cut-off events. [2024-06-21 21:16:06,083 INFO L125 PetriNetUnfolderBase]: For 94677/94681 co-relation queries the response was YES. [2024-06-21 21:16:06,136 INFO L83 FinitePrefix]: Finished finitePrefix Result has 68648 conditions, 17200 events. 12558/17200 cut-off events. For 94677/94681 co-relation queries the response was YES. Maximal size of possible extension queue 563. Compared 91176 event pairs, 5109 based on Foata normal form. 29/17226 useless extension candidates. Maximal degree in co-relation 68618. Up to 15868 conditions per place. [2024-06-21 21:16:06,204 INFO L140 encePairwiseOnDemand]: 35/51 looper letters, 121 selfloop transitions, 41 changer transitions 0/167 dead transitions. [2024-06-21 21:16:06,204 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 87 places, 167 transitions, 1424 flow [2024-06-21 21:16:06,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 21:16:06,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 21:16:06,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 190 transitions. [2024-06-21 21:16:06,205 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5322128851540616 [2024-06-21 21:16:06,206 INFO L175 Difference]: Start difference. First operand has 81 places, 89 transitions, 606 flow. Second operand 7 states and 190 transitions. [2024-06-21 21:16:06,206 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 87 places, 167 transitions, 1424 flow [2024-06-21 21:16:06,256 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 81 places, 167 transitions, 1364 flow, removed 4 selfloop flow, removed 6 redundant places. [2024-06-21 21:16:06,259 INFO L231 Difference]: Finished difference. Result has 85 places, 114 transitions, 912 flow [2024-06-21 21:16:06,259 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=546, PETRI_DIFFERENCE_MINUEND_PLACES=75, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=89, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=912, PETRI_PLACES=85, PETRI_TRANSITIONS=114} [2024-06-21 21:16:06,259 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 31 predicate places. [2024-06-21 21:16:06,260 INFO L495 AbstractCegarLoop]: Abstraction has has 85 places, 114 transitions, 912 flow [2024-06-21 21:16:06,260 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.375) internal successors, (99), 8 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:16:06,260 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:16:06,260 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:16:06,260 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-06-21 21:16:06,260 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 21:16:06,261 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:16:06,261 INFO L85 PathProgramCache]: Analyzing trace with hash 914022432, now seen corresponding path program 2 times [2024-06-21 21:16:06,261 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:16:06,261 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1336520428] [2024-06-21 21:16:06,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:16:06,262 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:16:06,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:16:07,061 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:16:07,062 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:16:07,062 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1336520428] [2024-06-21 21:16:07,062 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1336520428] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:16:07,062 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:16:07,062 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 21:16:07,062 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [294859583] [2024-06-21 21:16:07,062 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:16:07,063 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 21:16:07,063 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:16:07,063 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 21:16:07,063 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-21 21:16:07,185 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 51 [2024-06-21 21:16:07,185 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 85 places, 114 transitions, 912 flow. Second operand has 8 states, 8 states have (on average 12.375) internal successors, (99), 8 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:16:07,185 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:16:07,185 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 51 [2024-06-21 21:16:07,185 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:16:09,133 INFO L124 PetriNetUnfolderBase]: 12686/17401 cut-off events. [2024-06-21 21:16:09,133 INFO L125 PetriNetUnfolderBase]: For 130068/130068 co-relation queries the response was YES. [2024-06-21 21:16:09,168 INFO L83 FinitePrefix]: Finished finitePrefix Result has 80148 conditions, 17401 events. 12686/17401 cut-off events. For 130068/130068 co-relation queries the response was YES. Maximal size of possible extension queue 564. Compared 92380 event pairs, 5521 based on Foata normal form. 14/17413 useless extension candidates. Maximal degree in co-relation 80114. Up to 16979 conditions per place. [2024-06-21 21:16:09,228 INFO L140 encePairwiseOnDemand]: 36/51 looper letters, 130 selfloop transitions, 27 changer transitions 0/162 dead transitions. [2024-06-21 21:16:09,229 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 91 places, 162 transitions, 1508 flow [2024-06-21 21:16:09,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 21:16:09,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 21:16:09,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 173 transitions. [2024-06-21 21:16:09,231 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.484593837535014 [2024-06-21 21:16:09,231 INFO L175 Difference]: Start difference. First operand has 85 places, 114 transitions, 912 flow. Second operand 7 states and 173 transitions. [2024-06-21 21:16:09,231 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 91 places, 162 transitions, 1508 flow [2024-06-21 21:16:09,290 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 90 places, 162 transitions, 1450 flow, removed 28 selfloop flow, removed 1 redundant places. [2024-06-21 21:16:09,292 INFO L231 Difference]: Finished difference. Result has 94 places, 125 transitions, 1068 flow [2024-06-21 21:16:09,292 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=860, PETRI_DIFFERENCE_MINUEND_PLACES=84, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=114, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=90, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1068, PETRI_PLACES=94, PETRI_TRANSITIONS=125} [2024-06-21 21:16:09,293 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 40 predicate places. [2024-06-21 21:16:09,293 INFO L495 AbstractCegarLoop]: Abstraction has has 94 places, 125 transitions, 1068 flow [2024-06-21 21:16:09,293 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.375) internal successors, (99), 8 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:16:09,293 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:16:09,293 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:16:09,294 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-06-21 21:16:09,294 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 21:16:09,294 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:16:09,294 INFO L85 PathProgramCache]: Analyzing trace with hash 27205122, now seen corresponding path program 3 times [2024-06-21 21:16:09,294 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:16:09,295 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2029762988] [2024-06-21 21:16:09,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:16:09,295 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:16:09,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:16:10,094 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:16:10,095 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:16:10,095 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2029762988] [2024-06-21 21:16:10,095 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2029762988] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:16:10,095 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:16:10,095 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 21:16:10,095 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [411729215] [2024-06-21 21:16:10,095 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:16:10,096 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 21:16:10,096 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:16:10,096 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 21:16:10,097 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-21 21:16:10,219 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 51 [2024-06-21 21:16:10,219 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 94 places, 125 transitions, 1068 flow. Second operand has 8 states, 8 states have (on average 12.375) internal successors, (99), 8 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:16:10,219 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:16:10,219 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 51 [2024-06-21 21:16:10,219 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:16:12,032 INFO L124 PetriNetUnfolderBase]: 12752/17487 cut-off events. [2024-06-21 21:16:12,032 INFO L125 PetriNetUnfolderBase]: For 150557/150557 co-relation queries the response was YES. [2024-06-21 21:16:12,102 INFO L83 FinitePrefix]: Finished finitePrefix Result has 83095 conditions, 17487 events. 12752/17487 cut-off events. For 150557/150557 co-relation queries the response was YES. Maximal size of possible extension queue 565. Compared 92903 event pairs, 5514 based on Foata normal form. 14/17499 useless extension candidates. Maximal degree in co-relation 83055. Up to 16854 conditions per place. [2024-06-21 21:16:12,175 INFO L140 encePairwiseOnDemand]: 36/51 looper letters, 135 selfloop transitions, 36 changer transitions 0/176 dead transitions. [2024-06-21 21:16:12,175 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 100 places, 176 transitions, 1766 flow [2024-06-21 21:16:12,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 21:16:12,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 21:16:12,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 178 transitions. [2024-06-21 21:16:12,180 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49859943977591037 [2024-06-21 21:16:12,181 INFO L175 Difference]: Start difference. First operand has 94 places, 125 transitions, 1068 flow. Second operand 7 states and 178 transitions. [2024-06-21 21:16:12,181 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 100 places, 176 transitions, 1766 flow [2024-06-21 21:16:12,280 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 97 places, 176 transitions, 1696 flow, removed 16 selfloop flow, removed 3 redundant places. [2024-06-21 21:16:12,282 INFO L231 Difference]: Finished difference. Result has 99 places, 135 transitions, 1227 flow [2024-06-21 21:16:12,282 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=998, PETRI_DIFFERENCE_MINUEND_PLACES=91, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=125, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=93, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1227, PETRI_PLACES=99, PETRI_TRANSITIONS=135} [2024-06-21 21:16:12,283 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 45 predicate places. [2024-06-21 21:16:12,283 INFO L495 AbstractCegarLoop]: Abstraction has has 99 places, 135 transitions, 1227 flow [2024-06-21 21:16:12,283 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.375) internal successors, (99), 8 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:16:12,284 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:16:12,284 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:16:12,284 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-06-21 21:16:12,284 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 21:16:12,284 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:16:12,285 INFO L85 PathProgramCache]: Analyzing trace with hash -827855454, now seen corresponding path program 1 times [2024-06-21 21:16:12,285 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:16:12,285 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [471790944] [2024-06-21 21:16:12,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:16:12,285 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:16:12,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:16:13,585 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:16:13,585 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:16:13,585 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [471790944] [2024-06-21 21:16:13,585 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [471790944] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:16:13,585 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:16:13,585 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 21:16:13,586 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1404780061] [2024-06-21 21:16:13,586 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:16:13,586 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 21:16:13,586 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:16:13,587 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 21:16:13,587 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-21 21:16:13,691 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 51 [2024-06-21 21:16:13,691 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 99 places, 135 transitions, 1227 flow. Second operand has 9 states, 9 states have (on average 12.333333333333334) internal successors, (111), 9 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:16:13,691 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:16:13,691 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 51 [2024-06-21 21:16:13,691 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:16:15,817 INFO L124 PetriNetUnfolderBase]: 12933/17745 cut-off events. [2024-06-21 21:16:15,817 INFO L125 PetriNetUnfolderBase]: For 179873/179873 co-relation queries the response was YES. [2024-06-21 21:16:15,878 INFO L83 FinitePrefix]: Finished finitePrefix Result has 87663 conditions, 17745 events. 12933/17745 cut-off events. For 179873/179873 co-relation queries the response was YES. Maximal size of possible extension queue 571. Compared 94448 event pairs, 5396 based on Foata normal form. 30/17773 useless extension candidates. Maximal degree in co-relation 87621. Up to 17043 conditions per place. [2024-06-21 21:16:15,949 INFO L140 encePairwiseOnDemand]: 39/51 looper letters, 144 selfloop transitions, 34 changer transitions 0/183 dead transitions. [2024-06-21 21:16:15,949 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 105 places, 183 transitions, 1849 flow [2024-06-21 21:16:15,950 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 21:16:15,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 21:16:15,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 180 transitions. [2024-06-21 21:16:15,951 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5042016806722689 [2024-06-21 21:16:15,951 INFO L175 Difference]: Start difference. First operand has 99 places, 135 transitions, 1227 flow. Second operand 7 states and 180 transitions. [2024-06-21 21:16:15,951 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 105 places, 183 transitions, 1849 flow [2024-06-21 21:16:16,074 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 102 places, 183 transitions, 1779 flow, removed 24 selfloop flow, removed 3 redundant places. [2024-06-21 21:16:16,077 INFO L231 Difference]: Finished difference. Result has 103 places, 138 transitions, 1284 flow [2024-06-21 21:16:16,077 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=1157, PETRI_DIFFERENCE_MINUEND_PLACES=96, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=135, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=101, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1284, PETRI_PLACES=103, PETRI_TRANSITIONS=138} [2024-06-21 21:16:16,078 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 49 predicate places. [2024-06-21 21:16:16,078 INFO L495 AbstractCegarLoop]: Abstraction has has 103 places, 138 transitions, 1284 flow [2024-06-21 21:16:16,078 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.333333333333334) internal successors, (111), 9 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:16:16,078 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:16:16,078 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:16:16,079 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-06-21 21:16:16,079 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 21:16:16,079 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:16:16,079 INFO L85 PathProgramCache]: Analyzing trace with hash -1320893801, now seen corresponding path program 1 times [2024-06-21 21:16:16,079 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:16:16,080 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1202185866] [2024-06-21 21:16:16,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:16:16,080 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:16:16,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:16:16,763 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:16:16,763 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:16:16,763 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1202185866] [2024-06-21 21:16:16,763 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1202185866] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:16:16,763 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:16:16,764 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 21:16:16,764 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [836818104] [2024-06-21 21:16:16,764 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:16:16,764 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 21:16:16,764 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:16:16,764 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 21:16:16,765 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-06-21 21:16:16,857 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 51 [2024-06-21 21:16:16,858 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 103 places, 138 transitions, 1284 flow. Second operand has 6 states, 6 states have (on average 13.0) internal successors, (78), 6 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:16:16,858 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:16:16,858 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 51 [2024-06-21 21:16:16,858 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:16:18,684 INFO L124 PetriNetUnfolderBase]: 12919/17729 cut-off events. [2024-06-21 21:16:18,684 INFO L125 PetriNetUnfolderBase]: For 199459/199459 co-relation queries the response was YES. [2024-06-21 21:16:18,798 INFO L83 FinitePrefix]: Finished finitePrefix Result has 90571 conditions, 17729 events. 12919/17729 cut-off events. For 199459/199459 co-relation queries the response was YES. Maximal size of possible extension queue 571. Compared 94392 event pairs, 5541 based on Foata normal form. 4/17732 useless extension candidates. Maximal degree in co-relation 90527. Up to 17452 conditions per place. [2024-06-21 21:16:18,878 INFO L140 encePairwiseOnDemand]: 42/51 looper letters, 134 selfloop transitions, 13 changer transitions 0/152 dead transitions. [2024-06-21 21:16:18,879 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 107 places, 152 transitions, 1614 flow [2024-06-21 21:16:18,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-21 21:16:18,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-21 21:16:18,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 115 transitions. [2024-06-21 21:16:18,880 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45098039215686275 [2024-06-21 21:16:18,880 INFO L175 Difference]: Start difference. First operand has 103 places, 138 transitions, 1284 flow. Second operand 5 states and 115 transitions. [2024-06-21 21:16:18,880 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 107 places, 152 transitions, 1614 flow [2024-06-21 21:16:19,006 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 102 places, 152 transitions, 1493 flow, removed 29 selfloop flow, removed 5 redundant places. [2024-06-21 21:16:19,008 INFO L231 Difference]: Finished difference. Result has 103 places, 138 transitions, 1201 flow [2024-06-21 21:16:19,009 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=1163, PETRI_DIFFERENCE_MINUEND_PLACES=98, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=138, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=125, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1201, PETRI_PLACES=103, PETRI_TRANSITIONS=138} [2024-06-21 21:16:19,009 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 49 predicate places. [2024-06-21 21:16:19,009 INFO L495 AbstractCegarLoop]: Abstraction has has 103 places, 138 transitions, 1201 flow [2024-06-21 21:16:19,010 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 13.0) internal successors, (78), 6 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:16:19,010 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:16:19,010 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:16:19,010 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-06-21 21:16:19,010 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 21:16:19,010 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:16:19,011 INFO L85 PathProgramCache]: Analyzing trace with hash -1867458775, now seen corresponding path program 1 times [2024-06-21 21:16:19,011 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:16:19,011 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [439198629] [2024-06-21 21:16:19,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:16:19,011 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:16:19,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:16:20,126 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:16:20,126 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:16:20,126 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [439198629] [2024-06-21 21:16:20,126 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [439198629] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:16:20,126 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:16:20,126 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 21:16:20,127 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [375812795] [2024-06-21 21:16:20,127 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:16:20,127 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 21:16:20,127 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:16:20,127 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 21:16:20,127 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-21 21:16:20,242 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 51 [2024-06-21 21:16:20,242 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 103 places, 138 transitions, 1201 flow. Second operand has 8 states, 8 states have (on average 12.5) internal successors, (100), 8 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:16:20,242 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:16:20,242 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 51 [2024-06-21 21:16:20,242 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:16:22,177 INFO L124 PetriNetUnfolderBase]: 12941/17762 cut-off events. [2024-06-21 21:16:22,178 INFO L125 PetriNetUnfolderBase]: For 214803/214813 co-relation queries the response was YES. [2024-06-21 21:16:22,259 INFO L83 FinitePrefix]: Finished finitePrefix Result has 91280 conditions, 17762 events. 12941/17762 cut-off events. For 214803/214813 co-relation queries the response was YES. Maximal size of possible extension queue 571. Compared 94534 event pairs, 5427 based on Foata normal form. 13/17774 useless extension candidates. Maximal degree in co-relation 91235. Up to 17306 conditions per place. [2024-06-21 21:16:22,337 INFO L140 encePairwiseOnDemand]: 39/51 looper letters, 146 selfloop transitions, 35 changer transitions 0/186 dead transitions. [2024-06-21 21:16:22,338 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 109 places, 186 transitions, 1863 flow [2024-06-21 21:16:22,338 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 21:16:22,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 21:16:22,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 175 transitions. [2024-06-21 21:16:22,339 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49019607843137253 [2024-06-21 21:16:22,339 INFO L175 Difference]: Start difference. First operand has 103 places, 138 transitions, 1201 flow. Second operand 7 states and 175 transitions. [2024-06-21 21:16:22,340 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 109 places, 186 transitions, 1863 flow [2024-06-21 21:16:22,464 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 105 places, 186 transitions, 1814 flow, removed 10 selfloop flow, removed 4 redundant places. [2024-06-21 21:16:22,466 INFO L231 Difference]: Finished difference. Result has 106 places, 146 transitions, 1357 flow [2024-06-21 21:16:22,466 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=1152, PETRI_DIFFERENCE_MINUEND_PLACES=99, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=138, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=107, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1357, PETRI_PLACES=106, PETRI_TRANSITIONS=146} [2024-06-21 21:16:22,466 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 52 predicate places. [2024-06-21 21:16:22,466 INFO L495 AbstractCegarLoop]: Abstraction has has 106 places, 146 transitions, 1357 flow [2024-06-21 21:16:22,467 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.5) internal successors, (100), 8 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:16:22,467 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:16:22,467 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:16:22,467 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-06-21 21:16:22,467 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 21:16:22,467 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:16:22,467 INFO L85 PathProgramCache]: Analyzing trace with hash -1101177483, now seen corresponding path program 2 times [2024-06-21 21:16:22,468 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:16:22,468 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [733076767] [2024-06-21 21:16:22,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:16:22,468 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:16:22,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:16:23,505 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:16:23,505 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:16:23,505 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [733076767] [2024-06-21 21:16:23,507 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [733076767] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:16:23,508 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:16:23,508 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 21:16:23,508 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [415467838] [2024-06-21 21:16:23,508 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:16:23,508 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 21:16:23,509 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:16:23,509 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 21:16:23,509 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-21 21:16:23,602 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 51 [2024-06-21 21:16:23,603 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 106 places, 146 transitions, 1357 flow. Second operand has 8 states, 8 states have (on average 12.5) internal successors, (100), 8 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:16:23,603 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:16:23,603 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 51 [2024-06-21 21:16:23,603 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:16:25,654 INFO L124 PetriNetUnfolderBase]: 12932/17750 cut-off events. [2024-06-21 21:16:25,654 INFO L125 PetriNetUnfolderBase]: For 246036/246046 co-relation queries the response was YES. [2024-06-21 21:16:25,733 INFO L83 FinitePrefix]: Finished finitePrefix Result has 95064 conditions, 17750 events. 12932/17750 cut-off events. For 246036/246046 co-relation queries the response was YES. Maximal size of possible extension queue 571. Compared 94643 event pairs, 5427 based on Foata normal form. 13/17762 useless extension candidates. Maximal degree in co-relation 95019. Up to 17348 conditions per place. [2024-06-21 21:16:25,812 INFO L140 encePairwiseOnDemand]: 38/51 looper letters, 146 selfloop transitions, 29 changer transitions 0/180 dead transitions. [2024-06-21 21:16:25,813 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 112 places, 180 transitions, 1795 flow [2024-06-21 21:16:25,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 21:16:25,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 21:16:25,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 169 transitions. [2024-06-21 21:16:25,815 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4733893557422969 [2024-06-21 21:16:25,815 INFO L175 Difference]: Start difference. First operand has 106 places, 146 transitions, 1357 flow. Second operand 7 states and 169 transitions. [2024-06-21 21:16:25,815 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 112 places, 180 transitions, 1795 flow [2024-06-21 21:16:25,968 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 109 places, 180 transitions, 1678 flow, removed 46 selfloop flow, removed 3 redundant places. [2024-06-21 21:16:25,970 INFO L231 Difference]: Finished difference. Result has 110 places, 146 transitions, 1309 flow [2024-06-21 21:16:25,970 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=1240, PETRI_DIFFERENCE_MINUEND_PLACES=103, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=146, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=117, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1309, PETRI_PLACES=110, PETRI_TRANSITIONS=146} [2024-06-21 21:16:25,971 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 56 predicate places. [2024-06-21 21:16:25,971 INFO L495 AbstractCegarLoop]: Abstraction has has 110 places, 146 transitions, 1309 flow [2024-06-21 21:16:25,971 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.5) internal successors, (100), 8 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:16:25,971 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:16:25,971 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:16:25,971 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-06-21 21:16:25,972 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 21:16:25,972 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:16:25,972 INFO L85 PathProgramCache]: Analyzing trace with hash -1097458258, now seen corresponding path program 1 times [2024-06-21 21:16:25,972 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:16:25,972 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [151891245] [2024-06-21 21:16:25,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:16:25,973 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:16:25,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:16:26,820 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:16:26,821 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:16:26,821 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [151891245] [2024-06-21 21:16:26,821 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [151891245] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:16:26,821 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:16:26,821 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 21:16:26,821 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1443653005] [2024-06-21 21:16:26,821 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:16:26,822 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 21:16:26,822 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:16:26,822 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 21:16:26,823 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-21 21:16:26,906 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 51 [2024-06-21 21:16:26,906 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 110 places, 146 transitions, 1309 flow. Second operand has 8 states, 8 states have (on average 12.5) internal successors, (100), 8 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:16:26,906 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:16:26,906 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 51 [2024-06-21 21:16:26,906 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:16:28,815 INFO L124 PetriNetUnfolderBase]: 13060/17896 cut-off events. [2024-06-21 21:16:28,816 INFO L125 PetriNetUnfolderBase]: For 266981/266989 co-relation queries the response was YES. [2024-06-21 21:16:28,890 INFO L83 FinitePrefix]: Finished finitePrefix Result has 97232 conditions, 17896 events. 13060/17896 cut-off events. For 266981/266989 co-relation queries the response was YES. Maximal size of possible extension queue 575. Compared 95232 event pairs, 5066 based on Foata normal form. 18/17911 useless extension candidates. Maximal degree in co-relation 97185. Up to 16316 conditions per place. [2024-06-21 21:16:28,966 INFO L140 encePairwiseOnDemand]: 35/51 looper letters, 138 selfloop transitions, 64 changer transitions 0/207 dead transitions. [2024-06-21 21:16:28,966 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 116 places, 207 transitions, 2235 flow [2024-06-21 21:16:28,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 21:16:28,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 21:16:28,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 192 transitions. [2024-06-21 21:16:28,968 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5378151260504201 [2024-06-21 21:16:28,968 INFO L175 Difference]: Start difference. First operand has 110 places, 146 transitions, 1309 flow. Second operand 7 states and 192 transitions. [2024-06-21 21:16:28,968 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 116 places, 207 transitions, 2235 flow [2024-06-21 21:16:29,153 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 110 places, 207 transitions, 2163 flow, removed 4 selfloop flow, removed 6 redundant places. [2024-06-21 21:16:29,156 INFO L231 Difference]: Finished difference. Result has 113 places, 156 transitions, 1587 flow [2024-06-21 21:16:29,157 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=1237, PETRI_DIFFERENCE_MINUEND_PLACES=104, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=146, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=54, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=88, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1587, PETRI_PLACES=113, PETRI_TRANSITIONS=156} [2024-06-21 21:16:29,157 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 59 predicate places. [2024-06-21 21:16:29,157 INFO L495 AbstractCegarLoop]: Abstraction has has 113 places, 156 transitions, 1587 flow [2024-06-21 21:16:29,157 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.5) internal successors, (100), 8 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:16:29,157 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:16:29,158 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:16:29,158 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-06-21 21:16:29,158 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 21:16:29,158 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:16:29,158 INFO L85 PathProgramCache]: Analyzing trace with hash -1097452678, now seen corresponding path program 2 times [2024-06-21 21:16:29,158 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:16:29,159 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1548866713] [2024-06-21 21:16:29,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:16:29,159 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:16:29,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:16:29,937 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:16:29,937 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:16:29,938 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1548866713] [2024-06-21 21:16:29,938 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1548866713] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:16:29,938 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:16:29,938 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 21:16:29,938 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [486554937] [2024-06-21 21:16:29,938 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:16:29,939 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 21:16:29,939 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:16:29,939 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 21:16:29,939 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-21 21:16:30,025 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 51 [2024-06-21 21:16:30,025 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 113 places, 156 transitions, 1587 flow. Second operand has 8 states, 8 states have (on average 12.5) internal successors, (100), 8 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:16:30,025 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:16:30,025 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 51 [2024-06-21 21:16:30,026 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:16:31,987 INFO L124 PetriNetUnfolderBase]: 13188/18066 cut-off events. [2024-06-21 21:16:31,987 INFO L125 PetriNetUnfolderBase]: For 308430/308438 co-relation queries the response was YES. [2024-06-21 21:16:32,071 INFO L83 FinitePrefix]: Finished finitePrefix Result has 103638 conditions, 18066 events. 13188/18066 cut-off events. For 308430/308438 co-relation queries the response was YES. Maximal size of possible extension queue 580. Compared 96199 event pairs, 5003 based on Foata normal form. 18/18081 useless extension candidates. Maximal degree in co-relation 103588. Up to 16412 conditions per place. [2024-06-21 21:16:32,155 INFO L140 encePairwiseOnDemand]: 36/51 looper letters, 136 selfloop transitions, 66 changer transitions 0/207 dead transitions. [2024-06-21 21:16:32,155 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 119 places, 207 transitions, 2389 flow [2024-06-21 21:16:32,156 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 21:16:32,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 21:16:32,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 186 transitions. [2024-06-21 21:16:32,157 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5210084033613446 [2024-06-21 21:16:32,157 INFO L175 Difference]: Start difference. First operand has 113 places, 156 transitions, 1587 flow. Second operand 7 states and 186 transitions. [2024-06-21 21:16:32,157 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 119 places, 207 transitions, 2389 flow [2024-06-21 21:16:32,383 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 116 places, 207 transitions, 2257 flow, removed 33 selfloop flow, removed 3 redundant places. [2024-06-21 21:16:32,385 INFO L231 Difference]: Finished difference. Result has 117 places, 161 transitions, 1684 flow [2024-06-21 21:16:32,385 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=1465, PETRI_DIFFERENCE_MINUEND_PLACES=110, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=156, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=61, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=94, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1684, PETRI_PLACES=117, PETRI_TRANSITIONS=161} [2024-06-21 21:16:32,386 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 63 predicate places. [2024-06-21 21:16:32,386 INFO L495 AbstractCegarLoop]: Abstraction has has 117 places, 161 transitions, 1684 flow [2024-06-21 21:16:32,386 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.5) internal successors, (100), 8 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:16:32,386 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:16:32,386 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:16:32,386 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-06-21 21:16:32,386 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 21:16:32,387 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:16:32,387 INFO L85 PathProgramCache]: Analyzing trace with hash -1730074818, now seen corresponding path program 3 times [2024-06-21 21:16:32,387 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:16:32,387 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1221197556] [2024-06-21 21:16:32,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:16:32,387 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:16:32,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:16:33,105 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:16:33,106 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:16:33,106 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1221197556] [2024-06-21 21:16:33,106 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1221197556] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:16:33,106 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:16:33,106 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 21:16:33,106 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1594406211] [2024-06-21 21:16:33,106 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:16:33,106 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 21:16:33,107 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:16:33,107 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 21:16:33,107 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-21 21:16:33,188 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 51 [2024-06-21 21:16:33,189 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 117 places, 161 transitions, 1684 flow. Second operand has 8 states, 8 states have (on average 12.5) internal successors, (100), 8 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:16:33,189 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:16:33,189 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 51 [2024-06-21 21:16:33,189 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:16:35,526 INFO L124 PetriNetUnfolderBase]: 13254/18166 cut-off events. [2024-06-21 21:16:35,526 INFO L125 PetriNetUnfolderBase]: For 336594/336614 co-relation queries the response was YES. [2024-06-21 21:16:35,603 INFO L83 FinitePrefix]: Finished finitePrefix Result has 105265 conditions, 18166 events. 13254/18166 cut-off events. For 336594/336614 co-relation queries the response was YES. Maximal size of possible extension queue 585. Compared 96924 event pairs, 5480 based on Foata normal form. 24/18181 useless extension candidates. Maximal degree in co-relation 105214. Up to 17652 conditions per place. [2024-06-21 21:16:35,684 INFO L140 encePairwiseOnDemand]: 36/51 looper letters, 168 selfloop transitions, 30 changer transitions 0/203 dead transitions. [2024-06-21 21:16:35,685 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 123 places, 203 transitions, 2334 flow [2024-06-21 21:16:35,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 21:16:35,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 21:16:35,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 174 transitions. [2024-06-21 21:16:35,686 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48739495798319327 [2024-06-21 21:16:35,686 INFO L175 Difference]: Start difference. First operand has 117 places, 161 transitions, 1684 flow. Second operand 7 states and 174 transitions. [2024-06-21 21:16:35,687 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 123 places, 203 transitions, 2334 flow [2024-06-21 21:16:35,919 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 119 places, 203 transitions, 2200 flow, removed 21 selfloop flow, removed 4 redundant places. [2024-06-21 21:16:35,922 INFO L231 Difference]: Finished difference. Result has 120 places, 166 transitions, 1714 flow [2024-06-21 21:16:35,922 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=1554, PETRI_DIFFERENCE_MINUEND_PLACES=113, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=161, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=131, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1714, PETRI_PLACES=120, PETRI_TRANSITIONS=166} [2024-06-21 21:16:35,922 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 66 predicate places. [2024-06-21 21:16:35,922 INFO L495 AbstractCegarLoop]: Abstraction has has 120 places, 166 transitions, 1714 flow [2024-06-21 21:16:35,923 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.5) internal successors, (100), 8 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:16:35,923 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:16:35,923 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:16:35,923 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-06-21 21:16:35,923 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 21:16:35,923 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:16:35,924 INFO L85 PathProgramCache]: Analyzing trace with hash -1044576251, now seen corresponding path program 1 times [2024-06-21 21:16:35,924 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:16:35,924 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [754243422] [2024-06-21 21:16:35,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:16:35,924 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:16:35,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:16:36,938 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:16:36,939 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:16:36,939 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [754243422] [2024-06-21 21:16:36,939 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [754243422] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:16:36,939 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:16:36,939 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 21:16:36,939 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [178089375] [2024-06-21 21:16:36,939 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:16:36,939 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 21:16:36,940 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:16:36,940 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 21:16:36,940 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2024-06-21 21:16:37,024 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 51 [2024-06-21 21:16:37,024 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 120 places, 166 transitions, 1714 flow. Second operand has 9 states, 9 states have (on average 12.333333333333334) internal successors, (111), 9 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:16:37,025 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:16:37,025 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 51 [2024-06-21 21:16:37,025 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:16:39,897 INFO L124 PetriNetUnfolderBase]: 13287/18218 cut-off events. [2024-06-21 21:16:39,897 INFO L125 PetriNetUnfolderBase]: For 366025/366025 co-relation queries the response was YES. [2024-06-21 21:16:39,946 INFO L83 FinitePrefix]: Finished finitePrefix Result has 106618 conditions, 18218 events. 13287/18218 cut-off events. For 366025/366025 co-relation queries the response was YES. Maximal size of possible extension queue 587. Compared 97236 event pairs, 5445 based on Foata normal form. 7/18223 useless extension candidates. Maximal degree in co-relation 106566. Up to 17725 conditions per place. [2024-06-21 21:16:40,020 INFO L140 encePairwiseOnDemand]: 37/51 looper letters, 170 selfloop transitions, 39 changer transitions 0/214 dead transitions. [2024-06-21 21:16:40,020 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 126 places, 214 transitions, 2438 flow [2024-06-21 21:16:40,020 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 21:16:40,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 21:16:40,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 173 transitions. [2024-06-21 21:16:40,021 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.484593837535014 [2024-06-21 21:16:40,021 INFO L175 Difference]: Start difference. First operand has 120 places, 166 transitions, 1714 flow. Second operand 7 states and 173 transitions. [2024-06-21 21:16:40,022 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 126 places, 214 transitions, 2438 flow [2024-06-21 21:16:40,212 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 121 places, 214 transitions, 2340 flow, removed 22 selfloop flow, removed 5 redundant places. [2024-06-21 21:16:40,214 INFO L231 Difference]: Finished difference. Result has 124 places, 179 transitions, 1902 flow [2024-06-21 21:16:40,214 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=1616, PETRI_DIFFERENCE_MINUEND_PLACES=115, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=166, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=128, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1902, PETRI_PLACES=124, PETRI_TRANSITIONS=179} [2024-06-21 21:16:40,215 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 70 predicate places. [2024-06-21 21:16:40,215 INFO L495 AbstractCegarLoop]: Abstraction has has 124 places, 179 transitions, 1902 flow [2024-06-21 21:16:40,215 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.333333333333334) internal successors, (111), 9 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:16:40,215 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:16:40,216 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:16:40,216 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-06-21 21:16:40,216 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 21:16:40,216 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:16:40,216 INFO L85 PathProgramCache]: Analyzing trace with hash 220380359, now seen corresponding path program 1 times [2024-06-21 21:16:40,217 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:16:40,217 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2137588843] [2024-06-21 21:16:40,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:16:40,217 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:16:40,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:16:41,370 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:16:41,370 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:16:41,370 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2137588843] [2024-06-21 21:16:41,370 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2137588843] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:16:41,370 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:16:41,371 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 21:16:41,371 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2062616209] [2024-06-21 21:16:41,371 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:16:41,371 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 21:16:41,371 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:16:41,371 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 21:16:41,372 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-21 21:16:41,596 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 51 [2024-06-21 21:16:41,597 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 124 places, 179 transitions, 1902 flow. Second operand has 9 states, 9 states have (on average 12.444444444444445) internal successors, (112), 9 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:16:41,597 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:16:41,597 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 51 [2024-06-21 21:16:41,597 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:16:44,269 INFO L124 PetriNetUnfolderBase]: 13323/18277 cut-off events. [2024-06-21 21:16:44,269 INFO L125 PetriNetUnfolderBase]: For 408702/408712 co-relation queries the response was YES. [2024-06-21 21:16:44,341 INFO L83 FinitePrefix]: Finished finitePrefix Result has 113554 conditions, 18277 events. 13323/18277 cut-off events. For 408702/408712 co-relation queries the response was YES. Maximal size of possible extension queue 588. Compared 97582 event pairs, 4574 based on Foata normal form. 16/18292 useless extension candidates. Maximal degree in co-relation 113499. Up to 17668 conditions per place. [2024-06-21 21:16:44,532 INFO L140 encePairwiseOnDemand]: 39/51 looper letters, 185 selfloop transitions, 44 changer transitions 0/234 dead transitions. [2024-06-21 21:16:44,532 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 131 places, 234 transitions, 2746 flow [2024-06-21 21:16:44,533 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 21:16:44,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 21:16:44,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 198 transitions. [2024-06-21 21:16:44,534 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4852941176470588 [2024-06-21 21:16:44,534 INFO L175 Difference]: Start difference. First operand has 124 places, 179 transitions, 1902 flow. Second operand 8 states and 198 transitions. [2024-06-21 21:16:44,534 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 131 places, 234 transitions, 2746 flow [2024-06-21 21:16:44,815 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 128 places, 234 transitions, 2654 flow, removed 26 selfloop flow, removed 3 redundant places. [2024-06-21 21:16:44,818 INFO L231 Difference]: Finished difference. Result has 129 places, 185 transitions, 2058 flow [2024-06-21 21:16:44,818 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=1810, PETRI_DIFFERENCE_MINUEND_PLACES=121, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=179, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=138, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2058, PETRI_PLACES=129, PETRI_TRANSITIONS=185} [2024-06-21 21:16:44,819 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 75 predicate places. [2024-06-21 21:16:44,819 INFO L495 AbstractCegarLoop]: Abstraction has has 129 places, 185 transitions, 2058 flow [2024-06-21 21:16:44,819 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.444444444444445) internal successors, (112), 9 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:16:44,819 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:16:44,819 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:16:44,819 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-06-21 21:16:44,819 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 21:16:44,820 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:16:44,820 INFO L85 PathProgramCache]: Analyzing trace with hash 220440809, now seen corresponding path program 2 times [2024-06-21 21:16:44,820 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:16:44,820 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1769530299] [2024-06-21 21:16:44,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:16:44,820 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:16:44,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:16:45,930 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:16:45,931 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:16:45,931 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1769530299] [2024-06-21 21:16:45,931 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1769530299] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:16:45,931 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:16:45,931 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 21:16:45,931 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1744799957] [2024-06-21 21:16:45,931 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:16:45,931 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 21:16:45,932 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:16:45,932 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 21:16:45,932 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-21 21:16:46,122 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 51 [2024-06-21 21:16:46,123 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 129 places, 185 transitions, 2058 flow. Second operand has 9 states, 9 states have (on average 12.444444444444445) internal successors, (112), 9 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:16:46,123 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:16:46,123 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 51 [2024-06-21 21:16:46,123 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:16:48,666 INFO L124 PetriNetUnfolderBase]: 13359/18329 cut-off events. [2024-06-21 21:16:48,666 INFO L125 PetriNetUnfolderBase]: For 452615/452625 co-relation queries the response was YES. [2024-06-21 21:16:48,735 INFO L83 FinitePrefix]: Finished finitePrefix Result has 116855 conditions, 18329 events. 13359/18329 cut-off events. For 452615/452625 co-relation queries the response was YES. Maximal size of possible extension queue 588. Compared 97901 event pairs, 5244 based on Foata normal form. 16/18344 useless extension candidates. Maximal degree in co-relation 116799. Up to 17847 conditions per place. [2024-06-21 21:16:48,818 INFO L140 encePairwiseOnDemand]: 39/51 looper letters, 190 selfloop transitions, 38 changer transitions 0/233 dead transitions. [2024-06-21 21:16:48,819 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 136 places, 233 transitions, 2708 flow [2024-06-21 21:16:48,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 21:16:48,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 21:16:48,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 194 transitions. [2024-06-21 21:16:48,820 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47549019607843135 [2024-06-21 21:16:48,820 INFO L175 Difference]: Start difference. First operand has 129 places, 185 transitions, 2058 flow. Second operand 8 states and 194 transitions. [2024-06-21 21:16:48,820 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 136 places, 233 transitions, 2708 flow [2024-06-21 21:16:49,112 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 132 places, 233 transitions, 2555 flow, removed 57 selfloop flow, removed 4 redundant places. [2024-06-21 21:16:49,115 INFO L231 Difference]: Finished difference. Result has 133 places, 188 transitions, 2075 flow [2024-06-21 21:16:49,115 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=1929, PETRI_DIFFERENCE_MINUEND_PLACES=125, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=185, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=147, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2075, PETRI_PLACES=133, PETRI_TRANSITIONS=188} [2024-06-21 21:16:49,116 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 79 predicate places. [2024-06-21 21:16:49,116 INFO L495 AbstractCegarLoop]: Abstraction has has 133 places, 188 transitions, 2075 flow [2024-06-21 21:16:49,117 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.444444444444445) internal successors, (112), 9 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:16:49,117 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:16:49,117 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:16:49,117 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-06-21 21:16:49,117 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 21:16:49,118 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:16:49,118 INFO L85 PathProgramCache]: Analyzing trace with hash -2056646129, now seen corresponding path program 1 times [2024-06-21 21:16:49,118 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:16:49,118 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1653127240] [2024-06-21 21:16:49,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:16:49,118 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:16:49,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:16:50,394 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:16:50,394 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:16:50,394 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1653127240] [2024-06-21 21:16:50,394 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1653127240] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:16:50,394 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:16:50,394 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 21:16:50,394 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1152885492] [2024-06-21 21:16:50,394 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:16:50,395 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 21:16:50,395 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:16:50,395 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 21:16:50,395 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 21:16:50,528 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 51 [2024-06-21 21:16:50,528 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 133 places, 188 transitions, 2075 flow. Second operand has 9 states, 9 states have (on average 12.444444444444445) internal successors, (112), 9 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:16:50,528 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:16:50,529 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 51 [2024-06-21 21:16:50,529 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:16:53,425 INFO L124 PetriNetUnfolderBase]: 13625/18663 cut-off events. [2024-06-21 21:16:53,425 INFO L125 PetriNetUnfolderBase]: For 488311/488323 co-relation queries the response was YES. [2024-06-21 21:16:53,510 INFO L83 FinitePrefix]: Finished finitePrefix Result has 119965 conditions, 18663 events. 13625/18663 cut-off events. For 488311/488323 co-relation queries the response was YES. Maximal size of possible extension queue 602. Compared 100625 event pairs, 4551 based on Foata normal form. 22/18682 useless extension candidates. Maximal degree in co-relation 119907. Up to 15796 conditions per place. [2024-06-21 21:16:53,614 INFO L140 encePairwiseOnDemand]: 37/51 looper letters, 171 selfloop transitions, 100 changer transitions 0/276 dead transitions. [2024-06-21 21:16:53,614 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 140 places, 276 transitions, 3633 flow [2024-06-21 21:16:53,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 21:16:53,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 21:16:53,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 223 transitions. [2024-06-21 21:16:53,617 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5465686274509803 [2024-06-21 21:16:53,617 INFO L175 Difference]: Start difference. First operand has 133 places, 188 transitions, 2075 flow. Second operand 8 states and 223 transitions. [2024-06-21 21:16:53,617 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 140 places, 276 transitions, 3633 flow [2024-06-21 21:16:54,053 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 134 places, 276 transitions, 3519 flow, removed 21 selfloop flow, removed 6 redundant places. [2024-06-21 21:16:54,056 INFO L231 Difference]: Finished difference. Result has 138 places, 207 transitions, 2532 flow [2024-06-21 21:16:54,056 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=1961, PETRI_DIFFERENCE_MINUEND_PLACES=127, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=188, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=85, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=99, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2532, PETRI_PLACES=138, PETRI_TRANSITIONS=207} [2024-06-21 21:16:54,056 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 84 predicate places. [2024-06-21 21:16:54,056 INFO L495 AbstractCegarLoop]: Abstraction has has 138 places, 207 transitions, 2532 flow [2024-06-21 21:16:54,057 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.444444444444445) internal successors, (112), 9 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:16:54,057 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:16:54,057 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:16:54,057 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-06-21 21:16:54,057 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 21:16:54,057 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:16:54,057 INFO L85 PathProgramCache]: Analyzing trace with hash -2053844969, now seen corresponding path program 2 times [2024-06-21 21:16:54,058 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:16:54,058 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1393329749] [2024-06-21 21:16:54,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:16:54,058 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:16:54,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:16:55,251 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:16:55,252 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:16:55,252 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1393329749] [2024-06-21 21:16:55,252 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1393329749] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:16:55,252 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:16:55,252 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 21:16:55,252 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2140565484] [2024-06-21 21:16:55,252 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:16:55,253 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 21:16:55,253 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:16:55,253 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 21:16:55,253 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 21:16:55,426 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 51 [2024-06-21 21:16:55,426 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 138 places, 207 transitions, 2532 flow. Second operand has 9 states, 9 states have (on average 12.444444444444445) internal successors, (112), 9 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:16:55,426 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:16:55,426 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 51 [2024-06-21 21:16:55,426 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:16:58,423 INFO L124 PetriNetUnfolderBase]: 13891/19013 cut-off events. [2024-06-21 21:16:58,423 INFO L125 PetriNetUnfolderBase]: For 561918/561930 co-relation queries the response was YES. [2024-06-21 21:16:58,508 INFO L83 FinitePrefix]: Finished finitePrefix Result has 131570 conditions, 19013 events. 13891/19013 cut-off events. For 561918/561930 co-relation queries the response was YES. Maximal size of possible extension queue 614. Compared 102653 event pairs, 4751 based on Foata normal form. 22/19032 useless extension candidates. Maximal degree in co-relation 131508. Up to 16693 conditions per place. [2024-06-21 21:16:58,614 INFO L140 encePairwiseOnDemand]: 36/51 looper letters, 177 selfloop transitions, 103 changer transitions 0/285 dead transitions. [2024-06-21 21:16:58,614 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 145 places, 285 transitions, 4027 flow [2024-06-21 21:16:58,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 21:16:58,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 21:16:58,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 219 transitions. [2024-06-21 21:16:58,615 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5367647058823529 [2024-06-21 21:16:58,615 INFO L175 Difference]: Start difference. First operand has 138 places, 207 transitions, 2532 flow. Second operand 8 states and 219 transitions. [2024-06-21 21:16:58,615 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 145 places, 285 transitions, 4027 flow [2024-06-21 21:16:59,031 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 143 places, 285 transitions, 3859 flow, removed 69 selfloop flow, removed 2 redundant places. [2024-06-21 21:16:59,035 INFO L231 Difference]: Finished difference. Result has 147 places, 223 transitions, 2967 flow [2024-06-21 21:16:59,035 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=2386, PETRI_DIFFERENCE_MINUEND_PLACES=136, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=207, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=87, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=112, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2967, PETRI_PLACES=147, PETRI_TRANSITIONS=223} [2024-06-21 21:16:59,036 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 93 predicate places. [2024-06-21 21:16:59,036 INFO L495 AbstractCegarLoop]: Abstraction has has 147 places, 223 transitions, 2967 flow [2024-06-21 21:16:59,036 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.444444444444445) internal successors, (112), 9 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:16:59,036 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:16:59,036 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:16:59,037 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-06-21 21:16:59,037 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)] === [2024-06-21 21:16:59,037 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:16:59,037 INFO L85 PathProgramCache]: Analyzing trace with hash 223237319, now seen corresponding path program 3 times [2024-06-21 21:16:59,037 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:16:59,037 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [542577316] [2024-06-21 21:16:59,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:16:59,038 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:16:59,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:17:00,406 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:17:00,406 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:17:00,406 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [542577316] [2024-06-21 21:17:00,407 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [542577316] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:17:00,407 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:17:00,407 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 21:17:00,407 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [411984956] [2024-06-21 21:17:00,407 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:17:00,407 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 21:17:00,407 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:17:00,407 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 21:17:00,407 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-21 21:17:00,506 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 51 [2024-06-21 21:17:00,506 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 147 places, 223 transitions, 2967 flow. Second operand has 9 states, 9 states have (on average 12.444444444444445) internal successors, (112), 9 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:17:00,506 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:17:00,506 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 51 [2024-06-21 21:17:00,506 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand